oracle ids forms: build internet applications i
TRANSCRIPT
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Oracle iDS Forms: Build Internet Applications IElectronic Presentation
40033GC11Production 1.1May 2001D32778
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Copyright Oracle Corporation, 2000, 2001. All rights reserved.
This documentation contains proprietary information of Oracle Corporation. It is provided under a license agreement containing restrictions on use and disclosure and is also protected by copyright law. Reverse engineering of the software is prohibited. If this documentation is delivered to a U.S. Government Agency of the Department of Defense, then it is delivered with Restricted Rights and the following legend is applicable:
Restricted Rights Legend
Use, duplication or disclosure by the Government is subject to restrictions for commercial computer software and shall be deemed to be Restricted Rights software under Federal law, as set forth in subparagraph (c) (1) (ii) of DFARS 252.227-7013, Rights in Technical Data and Computer Software (October 1988).
This material or any portion of it may not be copied in any form or by any means without the express prior written permission of Oracle Corporation. Any other copying is a violation of copyright law and may result in civil and/or criminal penalties.
If this documentation is delivered to a U.S. Government Agency not within the Department of Defense, then it is delivered with “Restricted Rights,” as defined in FAR 52.227-14, Rights in Data-General, including Alternate III (June 1987).
The information in this document is subject to change without notice. If you find any problems in the documentation, please report them in writing to Education Products, Oracle Corporation, 500 Oracle Parkway, Box SB-6, Redwood Shores, CA 94065. Oracle Corporation does not warrant that this document is error-free.
Oracle is a registered trademark and Oracle Forms Developer, Oracle Forms Server, Oracle Reports Developer, Oracle Reports Server, and PL/SQL are trademarks or registered trademarks of Oracle Corporation.
All other products or company names are used for identification purposes only and may be trademarks of their respective owners.
AuthorEllen Gravina
Technical Contributorsand ReviewersDavid Ball
Soley Celik
Kathy Cunningham
Ken Goetz
Andrey Ivkin
Kenji Makita
Jayne Marlow
Ian Purvis
Bryan Roberts
Rie Saitoh
Raza Siddiqui
Kajornsak Sungchareon
Ted Witiuk
PublisherRodney HartzellDon Griffin (UK)
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Copyright Oracle Corporation, 2000. All rights reserved.
IntroductionIntroduction
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II--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Identify the course objectives• Identify the course content and structure
After completing this lesson, you should be able to do the following:• Identify the course objectives• Identify the course content and structure
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II--33 Copyright Oracle Corporation, 2000. All rights reserved.
Release 6i CurriculumRelease 6i Curriculum
Oracle 9iAS Forms ServicesDeploy Internet Applications
Oracle iDS Reports :Build Internet Reports
Report Builder Library
Oracle iDS Forms:Build Internet Applications I
ILTCBT
Form Builder Library
Oracle iDS Forms: : Build Internet Applications II
Form Builder Library
Oracle 9iAS Reports Services:Deploy Internet Applications
5 days5 days
3 days3 days
5 days5 days
2 days2 days 1 day1 day
WBT
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II--44 Copyright Oracle Corporation, 2000. All rights reserved.
Course ObjectivesCourse ObjectivesAfter completing this course, you should be able todo the following:• Describe the capabilities of Oracle Forms Developer• Create form modules including components for
database interaction and GUI controls• Display form modules in multiple windows and a variety
of layout styles• Implement triggers to:
– Enhance functionality– Communicate with users– Supplement validation, control navigation, and
modify default transaction processing• Reuse objects and code
After completing this course, you should be able todo the following:• Describe the capabilities of Oracle Forms Developer• Create form modules including components for
database interaction and GUI controls• Display form modules in multiple windows and a variety
of layout styles• Implement triggers to:
– Enhance functionality– Communicate with users– Supplement validation, control navigation, and
modify default transaction processing• Reuse objects and code
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II--55 Copyright Oracle Corporation, 2000. All rights reserved.
Course ContentCourse Content
Day 1• Lesson 1 Course Introduction• Lesson 2 Running a Form Builder Application• Lesson 3 Working in the Form Builder
Environment• Lesson 4 Creating a Basic Form Module
Day 1• Lesson 1 Course Introduction• Lesson 2 Running a Form Builder Application• Lesson 3 Working in the Form Builder
Environment• Lesson 4 Creating a Basic Form Module
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II--66 Copyright Oracle Corporation, 2000. All rights reserved.
Course ContentCourse Content
Day 2• Lesson 5 Working with Data Blocks and Frames• Lesson 6 Working with Text Items• Lesson 7 Creating LOVs and Editors• Lesson 8 Creating Additional Input Items
Day 2• Lesson 5 Working with Data Blocks and Frames• Lesson 6 Working with Text Items• Lesson 7 Creating LOVs and Editors• Lesson 8 Creating Additional Input Items
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II--77 Copyright Oracle Corporation, 2000. All rights reserved.
Course ContentCourse Content
Day 3• Lesson 9 Creating Non-Input Items• Lesson 10 Creating Windows and Content
Canvases• Lesson 11 Working with Other Canvases• Lesson 12 Introduction to Triggers• Lesson 13 Producing Triggers• Lesson 14 Debugging Triggers
Day 3• Lesson 9 Creating Non-Input Items• Lesson 10 Creating Windows and Content
Canvases• Lesson 11 Working with Other Canvases• Lesson 12 Introduction to Triggers• Lesson 13 Producing Triggers• Lesson 14 Debugging Triggers
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II--88 Copyright Oracle Corporation, 2000. All rights reserved.
Course ContentCourse Content
Day 4• Lesson 15 Adding Functionality to Items• Lesson 16 Runform Messages and Alerts• Lesson 17 Query Triggers• Lesson 18 Validation• Lesson 19 Navigation
Day 4• Lesson 15 Adding Functionality to Items• Lesson 16 Runform Messages and Alerts• Lesson 17 Query Triggers• Lesson 18 Validation• Lesson 19 Navigation
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II--99 Copyright Oracle Corporation, 2000. All rights reserved.
Course ContentCourse Content
Day 5• Lesson 20 Transaction Processing• Lesson 21 Writing Flexible Code• Lesson 22 Sharing Objects and Code• Lesson 23 Introducing Multiple Form
Applications
Day 5• Lesson 20 Transaction Processing• Lesson 21 Writing Flexible Code• Lesson 22 Sharing Objects and Code• Lesson 23 Introducing Multiple Form
Applications
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Copyright Oracle Corporation, 2000. All rights reserved.
Introduction to Oracle Forms Developer and Oracle Forms Services
Introduction to Oracle Forms Developer and Oracle Forms Services
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11--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Describe Oracle Forms Developer and Oracle
Forms Services components• Describe the architecture of Oracle Forms
Services• Describe Form Builder components• Navigate around the builder interface• Customize the Oracle Forms Developer session• Describe the course application
After completing this lesson, you should be able to do the following:• Describe Oracle Forms Developer and Oracle
Forms Services components• Describe the architecture of Oracle Forms
Services• Describe Form Builder components• Navigate around the builder interface• Customize the Oracle Forms Developer session• Describe the course application
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11--33 Copyright Oracle Corporation, 2000. All rights reserved.
Internet Computing SolutionsInternet Computing Solutions
Application Typeand Audience
Enterprise applications,Business developers
Java components,Component developers
ProductApproach
Repository-basedmodeling & generation,
Declarative
OracleProducts
Oracle Designer,Oracle Forms Developer, &
Oracle Forms Services
Two-way coding,Java and JavaBeans
Oracle JDeveloper Oracle9i Application Server
Browser-based,Dynamic HTML
Self-service applications &content management,Web site developers
Oracle PortalOracle Database Server
Dynamic Web reporting, Drill, slice & dice, Forecasting
Reporting and analytical applications,MIS & business users
Oracle Reports Developer,Oracle Reports Services,
Oracle Discoverer, &Oracle Express
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11--44 Copyright Oracle Corporation, 2000. All rights reserved.
Oracle Internet PlatformOracle Internet Platform
InternetDeveloperSuite
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11--55 Copyright Oracle Corporation, 2000. All rights reserved.
What Is Oracle Forms Developer?What Is Oracle Forms Developer?
A productive development environment for Internet business applications
– Data entry – Query screens
A productive development environment for Internet business applications
– Data entry – Query screens
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11--66 Copyright Oracle Corporation, 2000. All rights reserved.
What Is Oracle Forms Services?What Is Oracle Forms Services?
A component of Oracle9i Application Server thatdeploys Forms applications to Java clients in a Webenvironment
A component of Oracle9i Application Server thatdeploys Forms applications to Java clients in a Webenvironment
Oracle Forms Services
Oracle HTTP Server
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11--77 Copyright Oracle Corporation, 2000. All rights reserved.
9iAS Major Elements9iAS Major Elements
Oracle8i
Oracle8iJVM
Oracle8iCache
Enterprise Manager, Internet Directory
Discoverer
OracleHTTPServer
PoweredBy
Apache
Communication Services
PresentationServices
Business LogicServices
Data MgmtServices
System Services
Oracle JSP
Portal
Oracle8iPL/SQL
BC4JRuntime
Oracle PSP
Apache JServ
PerlInterpreter
iFS(eMail,
Network)
Reports
Forms
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11--88 Copyright Oracle Corporation, 2000. All rights reserved.
JavaJavaformsforms
Oracle HTTP ServerOracle HTTP Server
Oracle8Oracle8iior other databaseor other database
FormsServices
Oracle Forms Services ArchitectureOracle Forms Services Architecture
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11--99 Copyright Oracle Corporation, 2000. All rights reserved.
Forms ServicesForms Services
JRE
Applicationlogic layer
Data manager/PL/SQL engine
User interface layer
Forms Listener
Forms CGI or Servlet
Forms Runtime
Client TierClient Tier Database TierDatabase TierMiddle Tier:Middle Tier:
Application ServerApplication Server
Incrementallydownloaded
FMX file
User interfacelayer
User interfacelayer
User interfacelayer
User interfacelayer
User interfacelayer
User interfacelayer
User interfacelayer
User interfacelayerUser interface
layerUser interfacelayerUser interface
layerUser interfacelayerUser interface
layerUser interfacelayerUser interfacelayerUser interfacelayerUser interfacelayerUser interfacelayerUser interfacelayer
SQL*Net
Java applet
DB
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11--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Key FeaturesKey Features
• Comprehensive GUI support• Distributed applications• Tools for rapid application development• Application partitioning• Flexible source control• Extended scalability• Object reuse
• Comprehensive GUI support• Distributed applications• Tools for rapid application development• Application partitioning• Flexible source control• Extended scalability• Object reuse
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11--1111 Copyright Oracle Corporation, 2000. All rights reserved.
Form Builder ComponentsForm Builder Components
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11--1212 Copyright Oracle Corporation, 2000. All rights reserved.
Form Builder Layout EditorForm Builder Layout Editor
ToolbarToolbar
Tool PaletteTool Palette
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11--1313 Copyright Oracle Corporation, 2000. All rights reserved.
Oracle Toolkit and MultimediaOracle Toolkit and Multimedia
ApplicationsForms
OSF/MotifOSF/Motif
MicrosoftMicrosoftWindows 95Windows 95Windows NTWindows NT
CharacterCharactermodemode
12
3
4
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11--1414 Copyright Oracle Corporation, 2000. All rights reserved.
Getting StartedGetting Started
• Start Form Builder.• See the Welcome page with several options.• Connect to the database.• Select File—>Connect.
• Start Form Builder.• See the Welcome page with several options.• Connect to the database.• Select File——>>Connect.
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11--1515 Copyright Oracle Corporation, 2000. All rights reserved.
Main Menu StructureMain Menu Structure
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11--1616 Copyright Oracle Corporation, 2000. All rights reserved.
Customizing Your Oracle Developer Session
Customizing Your Oracle Developer Session
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11--1717 Copyright Oracle Corporation, 2000. All rights reserved.
Saving Tools PreferencesSaving Tools Preferences
1 2
3
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11--1818 Copyright Oracle Corporation, 2000. All rights reserved.
Oracle Forms DeveloperEnvironment Variables
Oracle Forms DeveloperEnvironment Variables
• FORMS60_PATH• UI_ICON• ORACLE_PATHWindows NT: Modify in Registry (REGEDIT.EXE or REGEDT32.EXE)
• FORMS60_PATH• UI_ICON• ORACLE_PATHWindows NT: Modify in Registry (REGEDIT.EXE or REGEDT32.EXE)
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11--1919 Copyright Oracle Corporation, 2000. All rights reserved.
Environment Variables and Y2K Compliance
Environment Variables and Y2K Compliance
• NLS_DATE_FORMAT• FORMS60_USER_DATE_FORMAT• NLS_DATE_FORMAT• FORMS60_USER_DATE_FORMAT
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11--2020 Copyright Oracle Corporation, 2000. All rights reserved.
Using the Online Help SystemUsing the Online Help System
• Quick Tour: Built-in CBT package of technical information
• Cue Cards: Simple step-by-step instructions
• Quick Tour: Built-in CBT package of technical information
• Cue Cards: Simple step-by-step instructions
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11--2121 Copyright Oracle Corporation, 2000. All rights reserved.
Summit Sporting Goods SchemaSummit Sporting Goods Schema
s_item s_ord s_customer
s_emps_inventory
s_product s_warehouse s_dept
s_image s_region
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11--2222 Copyright Oracle Corporation, 2000. All rights reserved.
Summit ApplicationSummit Application
CV_Customer Canvas
S_CUSTOMER Block
CV_Order Canvas
S_ORD Block
S_ITEM BlockCV_Inventory Canvas
S_Inventory Block
S_INVENTORYTable
S_CUSTOMERTable
S_ORDTable
S_ITEMTable
CustomersCustomersFormForm
OrdersOrdersFormForm
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11--2323 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Oracle Forms Developer features• Oracle Forms Services components• Builder interface• Builder preferences• The Summit course application
• Oracle Forms Developer features• Oracle Forms Services components• Builder interface• Builder preferences• The Summit course application
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11--2424 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 1 OverviewPractice 1 Overview
This practice covers the following topics:• Becoming familiar with the Object Navigator and
Layout Editor• Modifying file access preferences
This practice covers the following topics:• Becoming familiar with the Object Navigator and
Layout Editor• Modifying file access preferences
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Copyright Oracle Corporation, 2000. All rights reserved.
Running a Form Builder Application
Running a Form Builder Application
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22--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Describe application deployment environments• Describe the run-time environment• Navigate a Form Builder application• Describe the two modes of operation• Retrieve both restricted and unrestricted data• Insert, update, and delete records• Display database errors
After completing this lesson, you should be able to do the following:• Describe application deployment environments• Describe the run-time environment• Navigate a Form Builder application• Describe the two modes of operation• Retrieve both restricted and unrestricted data• Insert, update, and delete records• Display database errors
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22--33 Copyright Oracle Corporation, 2000. All rights reserved.
• Oracle Forms Services Web deployment
• Oracle Forms Developer client-server environment
• Oracle Forms Services Web deployment
• Oracle Forms Developer client-server environment
Application DeploymentApplication Deployment
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22--44 Copyright Oracle Corporation, 2000. All rights reserved.
Web Form TesterWeb Form Tester
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22--55 Copyright Oracle Corporation, 2000. All rights reserved.
Web Deployment: Run-Time ComponentsWeb Deployment: Run-Time Components
5
13 4
2
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22--66 Copyright Oracle Corporation, 2000. All rights reserved.
Client-Server Run-Time ComponentsClient-Server Run-Time Components
4
1
23
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22--77 Copyright Oracle Corporation, 2000. All rights reserved.
Client-Server Run-Time ComponentsClient-Server Run-Time Components
4
1
23
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22--88 Copyright Oracle Corporation, 2000. All rights reserved.
Data ElementsData Elements
1 2 3 4
5
7 6
98
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22--99 Copyright Oracle Corporation, 2000. All rights reserved.
Navigating at Run TimeNavigating at Run Time
• Default menu• Menu toolbar• Mouse• Buttons• Function keys
• Default menu• Menu toolbar• Mouse• Buttons• Function keys
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22--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Navigating at Run TimeNavigating at Run Time
• Default menu• Menu toolbar• Mouse• Buttons• Function keys
• Default menu• Menu toolbar• Mouse• Buttons• Function keys
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22--1111 Copyright Oracle Corporation, 2000. All rights reserved.
Allows:• Unrestricted and
restricted queries• Record count by using
Query—>Count Hits
Allows:• Unrestricted and
restricted queries• Record count by using
Query——>>Count Hits
Enter Query ModeEnter Query Mode
Does not allow:• Navigation out of
current data block• Exiting run-time session• Certain functions• Insert, update, delete
Does not allow:• Navigation out of
current data block• Exiting run-time session• Certain functions• Insert, update, delete
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22--1212 Copyright Oracle Corporation, 2000. All rights reserved.
Normal ModeNormal Mode
Allows:• Unrestricted queries• Insert, update, delete• Commit (Save)• Navigation out of
current data block• Exiting run-time session
Allows:• Unrestricted queries• Insert, update, delete• Commit (Save)• Navigation out of
current data block• Exiting run-time session
Does Not Allow:• Restricted queries• Query/Where dialog box
Does Not Allow:• Restricted queries• Query/Where dialog box
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22--1313 Copyright Oracle Corporation, 2000. All rights reserved.
Retrieving DataRetrieving Data
A B C D1234
A B C D34
Unrestricted queryUnrestricted query Restricted queryRestricted query
A B C D1
34
2
A B C D1234
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22--1414 Copyright Oracle Corporation, 2000. All rights reserved.
Retrieving Restricted DataRetrieving Restricted Data
• Do not use quotation marks with character and date items.
• The LIKE operator is implied with % or _.• Use hash (#) in front of SQL operators.• Use Query/Where for complex query conditions.• Use default date format (DD-MON-YY) in
Query/Where.• Use quotes around literals in Query/Where.
• Do not use quotation marks with character and date items.
• The LIKE operator is implied with % or _.• Use hash (#) in front of SQL operators.• Use Query/Where for complex query conditions.• Use default date format (DD-MON-YY) in
Query/Where.• Use quotes around literals in Query/Where.
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22--1515 Copyright Oracle Corporation, 2000. All rights reserved.
Query/Where Dialog BoxQuery/Where Dialog Box
• Invoke by:– Entering :variable_name– Executing query
• Used to write:– Complex search conditions– Queries with OR predicates– ORDER BY clause
• Invoke by:– Entering :variable_name– Executing query
• Used to write:– Complex search conditions– Queries with OR predicates– ORDER BY clause
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22--1616 Copyright Oracle Corporation, 2000. All rights reserved.
Query/Where Dialog BoxQuery/Where Dialog Box
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22--1717 Copyright Oracle Corporation, 2000. All rights reserved.
Making Changes PermanentMaking Changes Permanent
Form moduleForm moduleORDERS
Order
Item
Action
Save
FORMS RUNTIME
DeletesDeletes
UpdatesUpdates
InsertsInserts
MemoryMemory
oror
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22--1818 Copyright Oracle Corporation, 2000. All rights reserved.
Making Permanent ChangesMaking Permanent Changes
• Select Action—>Save to make changes permanent.
• Select Action—>Clear All to discard changes.
• Select Action——>Save to make changes permanent.
• Select Action—>Clear All to discard changes.
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22--1919 Copyright Oracle Corporation, 2000. All rights reserved.
Display ErrorDisplay Error
• Use to view Oracle errors• Select Help—>Display Error• Shows:
– SQL statement in error– Error information
• Use to view Oracle errors• Select Help—>Display Error• Shows:
– SQL statement in error– Error information
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22--2020 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• The run-time environment for forms deployed on the Web
• The run-time environment for forms deployed in a client-server environment
• Data elements• Navigation methods• Modes of operation:
– Normal mode– Enter Query mode
• The run-time environment for forms deployed on the Web
• The run-time environment for forms deployed in a client-server environment
• Data elements• Navigation methods• Modes of operation:
– Normal mode– Enter Query mode
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22--2121 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Retrieving data:– Restricted queries– Unrestricted queries
• Inserting, updating, and deleting data• Displaying errors
• Retrieving data:– Restricted queries– Unrestricted queries
• Inserting, updating, and deleting data• Displaying errors
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22--2222 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 2 OverviewPractice 2 Overview
This practice covers the following topics:• Running a form application on the Web and in a
client-server environment• Executing unrestricted and restricted queries• Performing inserts, updates, and deletes in a form
application• Saving changes to the database
This practice covers the following topics:• Running a form application on the Web and in a
client-server environment• Executing unrestricted and restricted queries• Performing inserts, updates, and deletes in a form
application• Saving changes to the database
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Copyright Oracle Corporation, 2000. All rights reserved.
Working in the Form Builder EnvironmentWorking in the Form Builder Environment
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33--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Identify the main Form Builder executables• Identify the main components of Form Builder• Identify the main objects in a form module
After completing this lesson, you should be able to do the following:• Identify the main Form Builder executables• Identify the main components of Form Builder• Identify the main objects in a form module
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33--33 Copyright Oracle Corporation, 2000. All rights reserved.
Form Builder Key FeaturesForm Builder Key Features
With Form Builder you can: • Insert, update, delete, and query data• Present data as text, sound, video, image, and
ActiveX controls• Control forms across several windows and
database transactions• Access Graphics and OLE2 applications• Use integrated menus• Send data to Oracle Reports Builder
With Form Builder you can: • Insert, update, delete, and query data• Present data as text, sound, video, image, and
ActiveX controls• Control forms across several windows and
database transactions• Access Graphics and OLE2 applications• Use integrated menus• Send data to Oracle Reports Builder
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33--44 Copyright Oracle Corporation, 2000. All rights reserved.
Form Builder ExecutablesForm Builder Executables
Form Builder
Form Compiler FormsRuntime
DefinitionsDefinitions
Run filesRun files
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33--55 Copyright Oracle Corporation, 2000. All rights reserved.
Form Builder Module TypesForm Builder Module Types
PL/SQLLibrary
ObjectLibrary
Menus Forms
Oracle Forms Developercomponents,
Oracle Reports DeveloperACTIVEX
DDEOLE2
OtherOther
Data sourcesData sources DatabaseDatabase
Libraries
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33--66 Copyright Oracle Corporation, 2000. All rights reserved.
Blocks, Items, and CanvasesBlocks, Items, and Canvases
Canvas 1Canvas 1 Canvas 2Canvas 2
ItemsItems
Block ABlock ABlock BBlock B
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33--77 Copyright Oracle Corporation, 2000. All rights reserved.
Navigation in a BlockNavigation in a Block
Canvas 1Canvas 1 Canvas 2Canvas 2
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33--88 Copyright Oracle Corporation, 2000. All rights reserved.
Data BlocksData Blocks
A B C
A B C
Master Data Block
D
X Y Z
Detail Data BlockX Y Z
TableTable
TableTable
43
6
5
2
1
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33--99 Copyright Oracle Corporation, 2000. All rights reserved.
Data BlocksData Blocks
A B C
A B C
Master Data Block
D
X Y Z
Detail Data BlockX Y Z
TableTable
TableTable
43
6
5
2
1
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33--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Forms and Data BlocksForms and Data Blocks
Block 1
Block 2
Block 3
Block 4
Block 1
Block 2
Block 1
Block 1
Single FormSingle FormModuleModule
Multiple Form ModulesMultiple Form Modules
Form AForm A Form BForm B
OpenOpenFormForm
Open FormOpen Form
Form CForm C
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33--1111 Copyright Oracle Corporation, 2000. All rights reserved.
ColumnColumn
Canvas
TriggerTrigger
Item
Item
Item
Frame
Window
TableTable
DatabaseDatabase
Form Module HierarchyForm Module Hierarchy
Module DatabaseDatabase
TableTable
Block(s)BlocksColumn
ItemItemItem
FrameCanvas
Window
TriggerTrigger
Program UnitsProgram units
TriggerTrigger
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33--1212 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Form Builder allows screen-based querying, inserting, updating, and deleting of data.
• Form Builder has powerful GUI and integration features.
• Applications can consist of form modules, menu modules, and library documents.
• Form Builder allows screen-based querying, inserting, updating, and deleting of data.
• Form Builder has powerful GUI and integration features.
• Applications can consist of form modules, menu modules, and library documents.
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33--1313 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Form modules consist of logical data blocks, which are logical owners of items.
• Items in a data block can span several canvases.
• Form modules consist of logical data blocks, which are logical owners of items.
• Items in a data block can span several canvases.
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Copyright Oracle Corporation, 2000. All rights reserved.
Creating a Basic Form ModuleCreating a Basic Form Module
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44--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Create a form module• Create a data block• Modify a data block by using the Data Block
Wizard• Modify the layout by using the Layout Wizard• Save, compile, and run a form module• Identify file formats and their characteristics• Create data blocks with relationships• Run a master-detail form module
After completing this lesson, you should be able to do the following:• Create a form module• Create a data block• Modify a data block by using the Data Block
Wizard• Modify the layout by using the Layout Wizard• Save, compile, and run a form module• Identify file formats and their characteristics• Create data blocks with relationships• Run a master-detail form module
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44--33 Copyright Oracle Corporation, 2000. All rights reserved.
Create data blocks and items
Apply standards
Fine-tune layout
Set object properties
Add code
Creating a New Form ModuleCreating a New Form Module
Test form module
Create an empty module
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44--44 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a New Form ModuleCreating a New Form Module
Choose one of several methods:• Use wizards:
– Data Block Wizard– Layout Wizard
• Build module manually• Use template form
Choose one of several methods:• Use wizards:
– Data Block Wizard– Layout Wizard
• Build module manually• Use template form
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44--55 Copyright Oracle Corporation, 2000. All rights reserved.
Form Module PropertiesForm Module Properties
Nameproperty
CoordinateSystemproperty
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44--66 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a New Data BlockCreating a New Data Block
Use Form Builder Wizards:• Data Block Wizard: Create a data block with
associated data source quickly and easily• Layout Wizard: Lay out data block contents for
visual presentation• Create manually
Use Form Builder Wizards:• Data Block Wizard: Create a data block with
associated data source quickly and easily• Layout Wizard: Lay out data block contents for
visual presentation• Create manually
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44--77 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a New Data BlockCreating a New Data Block
Launch DataBlock Wizard
Enter datasource
Launch LayoutWizard
Lay out datablock contents
New Data BlockNew Data Block
Reentrant modeReentrant mode
Reentrant modeReentrant mode
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44--88 Copyright Oracle Corporation, 2000. All rights reserved.
Navigating the WizardsNavigating the Wizards
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44--99 Copyright Oracle Corporation, 2000. All rights reserved.
Launching the Data Block Wizard
Launching the Data Block Wizard
In Form Builder, do one of the following:• Select Tools—>Data Block Wizard.• Click the right mouse button.
Use the Data Block Wizard option.• Select the Data Blocks node and then click the
Create icon in Object Navigator.Use the Data Block Wizard option.
• Use the Data Block Wizard button on the toolbar in the Layout Editor
In Form Builder, do one of the following:• Select Tools—>Data Block Wizard.• Click the right mouse button.
Use the Data Block Wizard option.• Select the Data Blocks node and then click the
Create icon in Object Navigator.Use the Data Block Wizard option.
• Use the Data Block Wizard button on the toolbar in the Layout Editor
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44--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Data Block Wizard: Type PageData Block Wizard: : Type Page
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44--1111 Copyright Oracle Corporation, 2000. All rights reserved.
Data Block Wizard: Table PageData Block Wizard: : Table Page
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44--1212 Copyright Oracle Corporation, 2000. All rights reserved.
Layout Wizard: Items PageLayout Wizard: : Items Page
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44--1313 Copyright Oracle Corporation, 2000. All rights reserved.
Layout Wizard: Style PageLayout Wizard: : Style Page
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44--1414 Copyright Oracle Corporation, 2000. All rights reserved.
Layout Wizard: Rows PageLayout Wizard: : Rows Page
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44--1515 Copyright Oracle Corporation, 2000. All rights reserved.
Data Block FunctionalityData Block Functionality
Once you create a data block with the wizards, Form Builder automatically creates:• A form module with database functionality
including query, insert, update, delete• A frame object• Items in the data block• A prompt for each item
Once you create a data block with the wizards, Form Builder automatically creates:• A form module with database functionality
including query, insert, update, delete• A frame object• Items in the data block• A prompt for each item
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44--1616 Copyright Oracle Corporation, 2000. All rights reserved.
Modifying the LayoutModifying the Layout
• Reentrant Layout Wizard:– Select frame in Object Navigator.– Select Tools—>Layout Wizard.or
– Select frame in Layout Editor.– Click Layout Wizard button.
• Layout Editor:– Select Tools—>Layout Editor.– Make changes manually.
• Frame Property Palette: Change property values.
• Reentrant Layout Wizard:– Select frame in Object Navigator.– Select Tools—>Layout Wizard.or
– Select frame in Layout Editor.– Click Layout Wizard button.
• Layout Editor:– Select Tools—>Layout Editor.– Make changes manually.
• Frame Property Palette: Change property values.
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44--1717 Copyright Oracle Corporation, 2000. All rights reserved.
Template FormTemplate Form
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44--1818 Copyright Oracle Corporation, 2000. All rights reserved.
Saving a Form ModuleSaving a Form Module
• Save the form module:– Select File—>Save.– Click the Save icon.
• Enter a filename.• Save to one of the following:
– File system– Database
• Save the form module:– Select File—>Save.– Click the Save icon.
• Enter a filename.• Save to one of the following:
– File system– Database
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44--1919 Copyright Oracle Corporation, 2000. All rights reserved.
Compiling a Form ModuleCompiling a Form Module
• Compile explicitly:– Select File—>Administration—>Compile File.– Launch the Form Compiler component.– Initiate from Command line interface.
• Compile implicitly:– Select Tools—>Preferences.– Set the Build Before Running preference.
• Compile explicitly:– Select File—>Administration—>Compile File.– Launch the Form Compiler component.– Initiate from Command line interface.
• Compile implicitly:– Select Tools—>Preferences.– Set the Build Before Running preference.
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44--2020 Copyright Oracle Corporation, 2000. All rights reserved.
Running a Form ModuleRunning a Form Module
• Web browser• Forms Runtime component• Command line interface• Form Builder component
– Select Program—>Run Form and then select the desired option.
– Click one of the Run icons.
• Web browser• Forms Runtime component• Command line interface• Form Builder component
– Select Program—>Run Form and then select the desired option.
– Click one of the Run icons.
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44--2121 Copyright Oracle Corporation, 2000. All rights reserved.
Running a Form Module on the WebRunning a Form Module on the Web
• Create an HTML file.
• View the URL in a browser.
• Create an HTML file.
• View the URL in a browser.
<EMBED type="application/x-jinit-applet"
CODE="oracle.forms.engine.Main"
CODEBASE="/web_frms/"
ARCHIVE="f60all.jar"
WIDTH=750 HEIGHT=400
serverPort="5555"
serverArgs="module=customers.fmxuserid=scott/tiger@mydatabase"
serverApp="/web_html/summit"
pluginspage="http://mymachine/jinit_download.htm">
<NOEMBED>
</NOEMBED></EMBED>
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44--2222 Copyright Oracle Corporation, 2000. All rights reserved.
Text Files and DocumentationText Files and Documentation
• Convert a binary file to a text file.• Create an ASCII file for a form module.• Convert a binary file to a text file.• Create an ASCII file for a form module.
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44--2323 Copyright Oracle Corporation, 2000. All rights reserved.
Module TypesModule Types
.fmb .fmx .fmtForm Module
.mmb .mmx .mmtMenuModule
.pll .plx .pldPL/SQLLibrary
.olb .oltObjectLibrary
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44--2424 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 4-1 OverviewPractice 4-1 Overview
This practice covers the following topics:• Creating a new form module• Creating a data block by using Form Builder
wizards• Saving and running the form module
This practice covers the following topics:• Creating a new form module• Creating a data block by using Form Builder
wizards• Saving and running the form module
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44--2525 Copyright Oracle Corporation, 2000. All rights reserved.
Form Block RelationshipsForm Block Relationships
Master
Detail
Master
Detail
Detail
Master
Detail Detail
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44--2626 Copyright Oracle Corporation, 2000. All rights reserved.
Data Block Wizard: Master-Detail PageData Block Wizard: Master-Detail Page
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44--2727 Copyright Oracle Corporation, 2000. All rights reserved.
Relation ObjectRelation Object
• New relation object created in Object Navigator under master data block node
• Default name assigned:MasterDataBlock_DetailDataBlock
• Triggers and program units generated automatically
• New relation object created in Object Navigator under master data block node
• Default name assigned:MasterDataBlock_DetailDataBlock
• Triggers and program units generated automatically
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44--2828 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a Relation ManuallyCreating a Relation Manually
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44--2929 Copyright Oracle Corporation, 2000. All rights reserved.
Deletion PropertiesDeletion Properties
IsolatedIsolated
CascadingCascading
NonisolatedNonisolatedNo Detail RecNo Detail Rec
NonisolatedNonisolatedDetail RecDetail Rec
= Deleted= Deleted
MasterMaster--DetailDetailRecordsRecords
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44--3030 Copyright Oracle Corporation, 2000. All rights reserved.
Coordination PropertiesCoordination Properties
DefaultDefault DeferredDeferredwith autowith auto
queryquery
DeferredDeferredwithoutwithout
auto queryauto query
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44--3131 Copyright Oracle Corporation, 2000. All rights reserved.
Join ConditionJoin Condition
• Creates primary-foreign key link between blocks• Define using:
– Block and item names– SQL equijoin syntax
• Creates primary-foreign key link between blocks• Define using:
– Block and item names– SQL equijoin syntax
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44--3232 Copyright Oracle Corporation, 2000. All rights reserved.
Running a Master-Detail Form ModuleRunning a Master-Detail Form Module
• Automatic block linking for:– Querying– Inserting
• Default deletion rules: Cannot delete master record if detail records exist
• Automatic block linking for:– Querying– Inserting
• Default deletion rules: Cannot delete master record if detail records exist
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44--3333 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Build a new form module: – Using Form Builder wizards – Manually– Using a template form
• Use the Data Block Wizard—data source.• Use the Layout Wizard—visual presentation.
• Build a new form module: – Using Form Builder wizards – Manually– Using a template form
• Use the Data Block Wizard—data source.• Use the Layout Wizard—visual presentation.
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44--3434 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Modify layout—reentrant wizards.• Save, compile, and run a form module.• Use module types and storage formats.• Create master-detail form module.
• Modify layout—reentrant wizards.• Save, compile, and run a form module.• Use module types and storage formats.• Create master-detail form module.
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44--3535 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 4-2 OverviewPractice 4-2 Overview
This practice covers the following topics:• Creating a master-detail form module • Modifying data block layout by using the Layout
Wizard in reentrant mode• Saving and running the form module
This practice covers the following topics:• Creating a master-detail form module • Modifying data block layout by using the Layout
Wizard in reentrant mode• Saving and running the form module
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Copyright Oracle Corporation, 2000. All rights reserved.
Working with Data Blocks and FramesWorking with Data Blocks and Frames
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55--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Identify the components of the Property Palette• Manipulate properties through the Property Palette• Control the behavior and appearance of data
blocks
After completing this lesson, you should be able to do the following:• Identify the components of the Property Palette• Manipulate properties through the Property Palette• Control the behavior and appearance of data
blocks
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55--33 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
• Control frame properties• Create blocks that do not directly correspond to
the database• Delete data blocks and their components
• Control frame properties• Create blocks that do not directly correspond to
the database• Delete data blocks and their components
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55--44 Copyright Oracle Corporation, 2000. All rights reserved.
Modifying the Appearance and Behavior of Data Blocks
Modifying the Appearance and Behavior of Data Blocks
• Reentrant wizards• Layout Editor• Data Block Property Palette• Frame Property Palette
• Reentrant wizards• Layout Editor• Data Block Property Palette• Frame Property Palette
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55--55 Copyright Oracle Corporation, 2000. All rights reserved.
Displaying the Property PaletteDisplaying the Property Palette
Use one of several methods:• Select Tools—>Property Palette.• Double-click the object icon in the Object
Navigator.• Double-click the object in Layout Editor.• Click the right mouse button.
Use one of several methods:• Select Tools—>Property Palette.• Double-click the object icon in the Object
Navigator.• Double-click the object in Layout Editor.• Click the right mouse button.
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55--66 Copyright Oracle Corporation, 2000. All rights reserved.
Property Palette FeaturesProperty Palette Features
PropertyPropertynamename
PropertyPropertyvaluevalue
ToolbarToolbar
Expand/Expand/CollapseCollapse
Find fieldFind field
SearchSearchBackwardBackwardSearchSearchForwardForward
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55--77 Copyright Oracle Corporation, 2000. All rights reserved.
Property ControlsProperty Controls
• Text field• Pop-up list• LOV window• More button
• Text field• Pop-up list• LOV window• More button
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55--88 Copyright Oracle Corporation, 2000. All rights reserved.
Visual AttributesVisual Attributes
• Visual attributes: – Are font, color, and pattern properties– Can be set for form and menu objects
• A visual attribute is a form object with font, color, and pattern properties.
• Set the Visual Attribute Group property to the visual attribute object.
• Visual attributes: – Are font, color, and pattern properties– Can be set for form and menu objects
• A visual attribute is a form object with font, color, and pattern properties.
• Set the Visual Attribute Group property to the visual attribute object.
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55--99 Copyright Oracle Corporation, 2000. All rights reserved.
Font, Pattern, and Color PickerFont, Pattern, and Color Picker
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55--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Data Block PropertiesData Block Properties
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55--1111 Copyright Oracle Corporation, 2000. All rights reserved.
Data Block Property GroupsData Block Property Groups
• General• Navigation• Records• Database• Advanced Database• Scrollbar• Font and Color• Character Mode• International
• General• Navigation• Records• Database• Advanced Database• Scrollbar• Font and Color• Character Mode• International
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55--1212 Copyright Oracle Corporation, 2000. All rights reserved.
Navigation PropertiesNavigation Properties
ORDERSOrder
ItemSameRecordNextRecord
Previous NavigationData Block
Next NavigationData Block
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55--1313 Copyright Oracle Corporation, 2000. All rights reserved.
Database PropertiesDatabase Properties
Use properties in the Database group to control:• Type of block—data or control block• Query, insert, update, and delete operations on the
data block• Data block’s data source• Query search criteria and default sort order• Maximum query time• Maximum number of records fetched
Use properties in the Database group to control:• Type of block—data or control block• Query, insert, update, and delete operations on the
data block• Data block’s data source• Query search criteria and default sort order• Maximum query time• Maximum number of records fetched
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55--1414 Copyright Oracle Corporation, 2000. All rights reserved.
SELECT ....
WHERE Clause
[ORDER BY Clause]
Database PropertiesDatabase Properties
Work fileWork file
Block displayBlock display
RecordsRecordsfetchedfetched
Records bufferedRecords buffered
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55--1515 Copyright Oracle Corporation, 2000. All rights reserved.
Records PropertiesRecords Properties
Vertical Record OrientationVertical Record Orientation
Horizontal Record OrientationHorizontal Record Orientation
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55--1616 Copyright Oracle Corporation, 2000. All rights reserved.
Records PropertiesRecords Properties
Item
Number
of Records
Displayed
Current Record
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55--1717 Copyright Oracle Corporation, 2000. All rights reserved.
Scroll Bar PropertiesScroll Bar Properties
Item Scroll Bar X/YPosition
Scroll Bar Width
ScrollBarHeight
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55--1818 Copyright Oracle Corporation, 2000. All rights reserved.
Frame PropertiesFrame PropertiesORDERS
Order
Item
FormLayoutStyle
TabularLayoutStyle
Distancebetweenrecords
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55--1919 Copyright Oracle Corporation, 2000. All rights reserved.
Multiple Property PalettesMultiple Property Palettes
• Display multiple Property Palettes for an object: 1 Open a Property Palette for the object.2 Hold down the [Shift] key and double-click the
object icon for an additional palette. • Display Property Palettes for multiple objects:
1 Open the Property Palette for first object.2 Click the Freeze/Unfreeze button on the
toolbar.3 Invoke Property Palette for the next object.
• Display multiple Property Palettes for an object: 1 Open a Property Palette for the object.2 Hold down the [Shift] key and double-click the
object icon for an additional palette. • Display Property Palettes for multiple objects:
1 Open the Property Palette for first object.2 Click the Freeze/Unfreeze button on the
toolbar.3 Invoke Property Palette for the next object.
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55--2020 Copyright Oracle Corporation, 2000. All rights reserved.
Setting Properties on Multiple ObjectsSetting Properties on Multiple Objects
Intersection/Union
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55--2121 Copyright Oracle Corporation, 2000. All rights reserved.
Copying PropertiesCopying PropertiesCopyCopy PastePaste
Source objectsSource objects Destination objectsDestination objects
PropertiesProperties
Name S_ITEMName S_ITEMQuery All Records NoQuery Allowed YesInsert Allowed YesUpdate Allowed YesDelete Allowed Yes
Query All Records YesQuery Allowed YesInsert Allowed YesUpdate Allowed NoDelete Allowed Yes
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55--2222 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a Control BlockCreating a Control Block
• Click the Data Blocks node and click the Create icon. or Select Navigator—>Create.
• Select the “Build a new data block manually” option in the New Data Block dialog box.
• Click the Data Blocks node and click the Create icon. or Select Navigator—>Create.
• Select the “Build a new data block manually” option in the New Data Block dialog box.
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55--2323 Copyright Oracle Corporation, 2000. All rights reserved.
Deleting a Data BlockDeleting a Data Block
• Select a data block for deletion and click the Delete icon. or Select Navigator—>Delete.
• Click Yes in the alert box.
• Select a data block for deletion and click the Delete icon. or Select Navigator—>Delete.
• Click Yes in the alert box.
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55--2424 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Modify the data block properties in its Property Palette to change its behavior.
• Data blocks have Navigation, Database, Records, Scrollbar, and other properties.
• Database properties include WHERE Clause, Query Data Source, and Maximum Records Fetched.
• Change frame properties to modify the arrangements of items within a data block.
• Modify the data block properties in its Property Palette to change its behavior.
• Data blocks have Navigation, Database, Records, Scrollbar, and other properties.
• Database properties include WHERE Clause, Query Data Source, and Maximum Records Fetched.
• Change frame properties to modify the arrangements of items within a data block.
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55--2525 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• A control block is not associated with the database.
• Copy properties between data blocks and other objects.
• View and change properties of several objects together (Intersection/Union).
• A control block is not associated with the database.
• Copy properties between data blocks and other objects.
• View and change properties of several objects together (Intersection/Union).
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55--2626 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 5 OverviewPractice 5 Overview
This practice covers the following topics:• Creating a control block• Creating a visual attribute• Modifying data block properties• Modifying frame properties
This practice covers the following topics:• Creating a control block• Creating a visual attribute• Modifying data block properties• Modifying frame properties
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Copyright Oracle Corporation, 2000. All rights reserved.
Working with Text ItemsWorking with Text Items
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66--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following :• Describe text items• Create a text item• Modify the appearance of a text item• Control the data in a text item
After completing this lesson, you should be able to do the following :• Describe text items• Create a text item• Modify the appearance of a text item• Control the data in a text item
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66--33 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
• Modify the navigational behavior of a text item• Enhance the relationship between the text item
and the database• Modify the functionality of a text item• Include Help messages
• Modify the navigational behavior of a text item• Enhance the relationship between the text item
and the database• Modify the functionality of a text item• Include Help messages
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66--44 Copyright Oracle Corporation, 2000. All rights reserved.
Text ItemsText Items
• Default item type• Interface object for:
– Querying– Inserting– Updating– Deleting
• Behavior defined in the Property Palette
• Default item type• Interface object for:
– Querying– Inserting– Updating– Deleting
• Behavior defined in the Property Palette
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66--55 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a Text ItemCreating a Text ItemCanvas selectionCanvas selection Block selectionBlock selection
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66--66 Copyright Oracle Corporation, 2000. All rights reserved.
Modifying the Appearance of a Text ItemModifying the Appearance of a Text Item
Order
Item
Distancebetweenrecords
Numberof itemsdisplayed
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66--77 Copyright Oracle Corporation, 2000. All rights reserved.
Font and Color PropertiesFont and Color Properties
Use properties in the Font and Color group to specifyan item’s:• Visual attributes• Font name, size, weight, style, color, and pattern
Use properties in the Font and Color group to specifyan item’s:• Visual attributes• Font name, size, weight, style, color, and pattern
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66--88 Copyright Oracle Corporation, 2000. All rights reserved.
PromptsPrompts
• Prompts specify the text label that is associated with an item.
• Several properties are available to arrange and manage prompts.
• Use prompt properties of an item to change the prompt’s display style, justification, alignment, color, and font.
• Prompts specify the text label that is associated with an item.
• Several properties are available to arrange and manage prompts.
• Use prompt properties of an item to change the prompt’s display style, justification, alignment, color, and font.
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66--99 Copyright Oracle Corporation, 2000. All rights reserved.
Associating Text with an Item PromptAssociating Text with an Item Prompt
1
2
3
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66--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Synchronize with Item PropertySynchronize with Item Property
1 2
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66--1111 Copyright Oracle Corporation, 2000. All rights reserved.
Copy Value from Item PropertyCopy Value from Item Property
ORDERS
Sales
Dept1Region Id
Name
Id Last Name First Name Title Dept Id3 Nagayama Midori VP, Sales 3111 Magee Colin Sales Rep 31
Employee
31Id
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66--1212 Copyright Oracle Corporation, 2000. All rights reserved.
Format MasksFormat Masks
• Standard SQL formats– Dates FXDD-MON-YY– Numbers L099G99D99
• Nonstandard formatsUse double quotes for embedded characters"("099")"099"-"0999
Note: Allow for format mask’s embedded characters when defining Width property.
• Standard SQL formats– Dates FXDD-MON-YY– Numbers L099G99D99
• Nonstandard formatsUse double quotes for embedded characters"("099")"099"-"0999
Note: Allow for format mask’s embedded characters when defining Width property.
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66--1313 Copyright Oracle Corporation, 2000. All rights reserved.
Initial ValuesInitial Values
• Are used for every new record• Can be overwritten• Must be compatible with item’s data type• Use:
– Raw value– System variable– Global variable– Form parameter– Form item– Sequence
• Are used for every new record• Can be overwritten• Must be compatible with item’s data type• Use:
– Raw value– System variable– Global variable– Form parameter– Form item– Sequence
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66--1414 Copyright Oracle Corporation, 2000. All rights reserved.
Navigational Behavior of Text ItemsNavigational Behavior of Text Items
• Established by order of entries in Object Navigator• Controlled by:
– Keyboard Navigable– Previous Navigation Item– Next Navigation Item
• Established by order of entries in Object Navigator• Controlled by:
– Keyboard Navigable– Previous Navigation Item– Next Navigation Item
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66--1515 Copyright Oracle Corporation, 2000. All rights reserved.
Database PropertiesDatabase Properties
Use properties in the Database group to control:• Item’s data source—base table item or control item• Query, insert, and update operations on an item• Maximum query length • Query case
Use properties in the Database group to control:• Item’s data source——base table item or control item• Query, insert, and update operations on an item• Maximum query length • Query case
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66--1616 Copyright Oracle Corporation, 2000. All rights reserved.
Functional PropertiesFunctional Properties
Item
Id Product Id Price Shipped Item Total10011 135 500 67,500.00
10013 380 400 152,000.00
12
Order
CREDIT
Order Id DateOrdered
DateShipped
PaymentType
100
Enabled=No
31-aug-1992
10-sep-1992
CaseRestriction=Upper
Justification =Start
Justification =Right
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66--1717 Copyright Oracle Corporation, 2000. All rights reserved.
Conceal Data PropertyConceal Data Property
Enter Userid:
Enter Password:
scott
*****
Log Screen
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66--1818 Copyright Oracle Corporation, 2000. All rights reserved.
Keyboard Navigable and Enabled Properties
Keyboard Navigable and Enabled Properties
• Set both properties to allow or disallow navigation and interaction with text item.
• When Enabled is set to Yes, Keyboard Navigable can be set to Yes or No.
• When Enabled is set to No, the item is always nonnavigable.
• Set both properties to allow or disallow navigation and interaction with text item.
• When Enabled is set to Yes, Keyboard Navigable can be set to Yes or No.
• When Enabled is set to No, the item is always nonnavigable.
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66--1919 Copyright Oracle Corporation, 2000. All rights reserved.
Multiline Text ItemsMultiline Text Items
Text
Text
Text
Text
WidthWidth
HeightHeight
Total text = Maximum lengthTotal text = Maximum length
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66--2020 Copyright Oracle Corporation, 2000. All rights reserved.
Help PropertiesHelp Properties
HintHint
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66--2121 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Creating a text item• Modifying appearance• Controlling data• Altering navigational behavior• Enhancing relationship with database• Adding functionality• Including context-sensitive Help
• Creating a text item• Modifying appearance• Controlling data• Altering navigational behavior• Enhancing relationship with database• Adding functionality• Including context-sensitive Help
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66--2222 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 6 OverviewPractice 6 Overview
This practice covers the following topics:• Deleting text items• Modifying text item properties• Creating text items
This practice covers the following topics:• Deleting text items• Modifying text item properties• Creating text items
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Copyright Oracle Corporation, 2000. All rights reserved.
Creating LOVs and EditorsCreating LOVs and Editors
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Copyright Oracle Corporation, 2000. All rights reserved.77--22
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Describe LOVs and editors• Design, create, and associate LOVs with text items
in a form module• Create editors and associate them with text items
in a form module
After completing this lesson, you should be able to do the following:• Describe LOVs and editors• Design, create, and associate LOVs with text items
in a form module• Create editors and associate them with text items
in a form module
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Copyright Oracle Corporation, 2000. All rights reserved.77--33
LOVs and EditorsLOVs and Editors
Text item
Editor
Text item Text item
LOV
Supporting dataSupporting datarecord grouprecord group
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Copyright Oracle Corporation, 2000. All rights reserved.77--44
LOVs and EditorsLOVs and Editors
• LOVs– List of values for text items– Dynamic or static list– Independent of single text items– Flexible and efficient
• Editors– Override default editor– Used for special requirements such as larger
editing window, position, color, and title– System editor available as an option
• LOVs– List of values for text items– Dynamic or static list– Independent of single text items– Flexible and efficient
• Editors– Override default editor– Used for special requirements such as larger
editing window, position, color, and title– System editor available as an option
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Copyright Oracle Corporation, 2000. All rights reserved.77--55
LOVs and Record GroupsLOVs and Record Groups
Text item
LOV
Text item
LOV
Record group
SQL
DatabaseDatabase
Record groupRecord groupRecord groupbased onbased onstatic datastatic data
QueryQuery--basedbasedrecordrecordgroupgroup
OROR
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Copyright Oracle Corporation, 2000. All rights reserved.77--66
LOVsLOVs
S_CUSTOMERS_CUSTOMER tabletableSELECT name, id, phone, cityFROM s_customerORDER BY name
SELECT name, id, phone, cityFROM s_customerORDER BY name
name id phone cityCustomersCustomersrecord grouprecord group
CustomersCustomersLOVLOV
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Copyright Oracle Corporation, 2000. All rights reserved.77--77
Creating an LOV Using the LOV Wizard: SQL Query Page
Creating an LOV Using the LOV Wizard: SQL Query Page
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Copyright Oracle Corporation, 2000. All rights reserved.77--88
Creating an LOV Using the LOV Wizard: Column Selection Page
Creating an LOV Using the LOV Wizard: Column Selection Page
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Copyright Oracle Corporation, 2000. All rights reserved.77--99
Creating an LOV Using the LOV Wizard: Column Properties Page
Creating an LOV Using the LOV Wizard: Column Properties Page
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Copyright Oracle Corporation, 2000. All rights reserved.77--1010
Creating an LOV Using the LOV Wizard: Display Page
Creating an LOV Using the LOV Wizard: Display Page
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Copyright Oracle Corporation, 2000. All rights reserved.77--1111
Creating an LOV Using the LOV Wizard: Advanced Properties Page
Creating an LOV Using the LOV Wizard: Advanced Properties Page
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Copyright Oracle Corporation, 2000. All rights reserved.77--1212
LOV PropertiesLOV Properties
Filter BeforeDisplay
?
(X,Y)(X,Y)
AutomaticAutomaticSelectSelect
AutomaticAutomaticSkipSkip
Automatic DisplayAutomatic Display
WidthWidth
HeightHeight
LOV
Column MappingColumn Mapping
Return ItemsReturn Items
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Copyright Oracle Corporation, 2000. All rights reserved.77--1313
LOV PropertiesLOV Properties
LOV
Column MappingColumn Mapping
Return ItemsReturn Items
AutomaticAutomaticPositionPosition
AutomaticAutomaticColumn WidthColumn Width
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Copyright Oracle Corporation, 2000. All rights reserved.77--1414
LOV Column MappingLOV Column Mapping
S_CUSTOMER tableS_CUSTOMER tableSELECT name, id, phone, cityFROM s_customerORDER BY name
SELECT name, id, phone, cityFROM s_customerORDER BY name
name id phone cityCustomersCustomersrecord grouprecord group
CustomersCustomersLOVLOV
customer.name customer.id
Phone City809-352689 San Pedro De 1-415-555-6281 San Francisco91-1031 New Delhi52-404562 Nogales
Hidden columnsHidden columns
customer.phone customer.city
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Copyright Oracle Corporation, 2000. All rights reserved.77--1515
EditorsEditors
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Copyright Oracle Corporation, 2000. All rights reserved.77--1616
EditorsEditors
• Associate one of three types of editors with a text item.
• Set text item’s Editor property to one of the following:– Null (default Form Builder editor)– editor_name (customized editor)– SYSTEM_EDITOR (external editor)
• Associate one of three types of editors with a text item.
• Set text item’s Editor property to one of the following:– Null (default Form Builder editor)– editor_name (customized editor)– SYSTEM_EDITOR (external editor)
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Copyright Oracle Corporation, 2000. All rights reserved.77--1717
SummarySummary
• LOVs and editors are form objects.• LOVs and editors can be shared across text items.• There are three steps to implement an LOV.• Text items can use the default editor, a custom
editor, or a system editor.
• LOVs and editors are form objects.• LOVs and editors can be shared across text items.• There are three steps to implement an LOV.• Text items can use the default editor, a custom
editor, or a system editor.
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Copyright Oracle Corporation, 2000. All rights reserved.77--1818
Practice 7 OverviewPractice 7 Overview
This practice covers the following topics:• Creating an LOV and attaching the LOV
to a text item• Creating an editor and attaching the editor
to a text item
This practice covers the following topics:• Creating an LOV and attaching the LOV
to a text item• Creating an editor and attaching the editor
to a text item
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Copyright Oracle Corporation, 2000. All rights reserved.
Creating Additional Input ItemsCreating Additional Input Items
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88--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Identify the item types that allow input• Create a check box• Create a list item• Create a radio group
After completing this lesson, you should be able to do the following:• Identify the item types that allow input• Create a check box• Create a list item• Create a radio group
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88--33 Copyright Oracle Corporation, 2000. All rights reserved.
Input ItemsInput Items
• Item types that accept user input include:– Check boxes– List items– Radio groups
• Input items enable insert, update, delete, and query.
• Item types that accept user input include:– Check boxes– List items– Radio groups
• Input items enable insert, update, delete, and query.
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88--44 Copyright Oracle Corporation, 2000. All rights reserved.
Check BoxesCheck Boxes
• Two-state interface object:– Checked– Unchecked
• Not limited to two values
• Two-state interface object:– Checked– Unchecked
• Not limited to two values
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88--55 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a Check BoxCreating a Check Box
• Convert an existing item.• Use the Check Box tool in the Layout Editor.• Use the Create icon in the Object Navigator.
• Convert an existing item.• Use the Check Box tool in the Layout Editor.• Use the Create icon in the Object Navigator.
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88--66 Copyright Oracle Corporation, 2000. All rights reserved.
Check Box Specific PropertiesCheck Box Specific Properties
• Data Type• Label• Access Key• Value When Checked
• Data Type• Label• Access Key• Value When Checked
• Value When Unchecked
• Check Box Mapping of Other Values
• Mouse Navigate
• Value When Unchecked
• Check Box Mapping of Other Values
• Mouse Navigate
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88--77 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a Check BoxCreating a Check Box
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88--88 Copyright Oracle Corporation, 2000. All rights reserved.
Check Box Mapping of Other Values
Check Box Mapping of Other Values
YY
YY
NN
NullNull
AA
Order_FilledOrder_Filled CheckedChecked
UncheckedUnchecked
Check Box Mapping ofCheck Box Mapping ofOther ValuesOther Values
UncheckedUnchecked
YY
NN
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88--99 Copyright Oracle Corporation, 2000. All rights reserved.
List ItemsList Items
• Set of mutually exclusive choices, each representing a different value
• Three list styles available• Space-saving alternative to a radio group• Smaller-scale alternative to an LOV
• Set of mutually exclusive choices, each representing a different value
• Three list styles available• Space-saving alternative to a radio group• Smaller-scale alternative to an LOV
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88--1010 Copyright Oracle Corporation, 2000. All rights reserved.
List StylesList Styles
Excellent PoplistPoplist
TlistTlistGood
Poor
Excellent
Excellent Combo BoxCombo Box
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88--1111 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a List ItemCreating a List Item
• Convert an existing item.• Use the List Item tool in the Layout Editor.• Use the Create icon in the Object Navigator.
• Convert an existing item.• Use the List Item tool in the Layout Editor.• Use the Create icon in the Object Navigator.
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88--1212 Copyright Oracle Corporation, 2000. All rights reserved.
List Item Specific PropertiesList Item Specific Properties
• Elements in List:– List elements– List item value
• List Style• Mapping of Other Values• Mouse Navigate
• Elements in List:– List elements– List item value
• List Style• Mapping of Other Values• Mouse Navigate
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88--1313 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a List ItemCreating a List Item
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88--1414 Copyright Oracle Corporation, 2000. All rights reserved.
List Item Mapping of Other Values
List Item Mapping of Other Values
Credit_RatingCredit_Rating
EXCELLENTEXCELLENT
GOODGOOD
POORPOORFAIRFAIR
EXCELLENTEXCELLENT
Excellent
Good
Poor
List ElementsList Elements
Mapping of Other Mapping of Other Values = PoorValues = Poor
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88--1515 Copyright Oracle Corporation, 2000. All rights reserved.
Radio GroupsRadio Groups
• Set of mutually exclusive radio buttons, each representing a value
• Use:– To display two or more static choices– As an alternative to a list item– As an alternative to a check box
• Set of mutually exclusive radio buttons, each representing a value
• Use:– To display two or more static choices– As an alternative to a list item– As an alternative to a check box
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88--1616 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a Radio GroupCreating a Radio Group
• Convert an existing item.• Create a new radio group item in the Layout
Editor.• Use the Create icon in the Object Navigator.
• Convert an existing item.• Create a new radio group item in the Layout
Editor.• Use the Create icon in the Object Navigator.
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88--1717 Copyright Oracle Corporation, 2000. All rights reserved.
Radio Group and Radio Button Specific Properties
Radio Group and Radio Button Specific Properties
Radio group• Data Type • Mapping of Other
Values• Mouse Navigate
Radio group• Data Type • Mapping of Other
Values• Mouse Navigate
Radio button• Access Key• Label• Radio Button Value
Radio button• Access Key• Label• Radio Button Value
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88--1818 Copyright Oracle Corporation, 2000. All rights reserved.
Creating Radio ButtonsCreating Radio Buttons
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88--1919 Copyright Oracle Corporation, 2000. All rights reserved.
Radio Group Mapping of Other Values
Radio Group Mapping of Other Values
Payment_TypePayment_Type
CASHCASH
CHECKCHECKCREDITCREDIT
NullNull
List ElementsList Elements
BUTTON1Cash
BUTTON2Credit
BUTTON3
Mapping ofOther Values
BUTTON1
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88--2020 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Check boxes• List items• Radio groups
• Check boxes• List items• Radio groups
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88--2121 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 8 OverviewPractice 8 Overview
This practice covers the following topics:• Converting a text item into a list item• Converting a text item into a check box item• Converting a text item into a radio group• Adding radio buttons to the radio group
This practice covers the following topics:• Converting a text item into a list item• Converting a text item into a check box item• Converting a text item into a radio group• Adding radio buttons to the radio group
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Copyright Oracle Corporation, 2000. All rights reserved.
Creating Noninput ItemsCreating Noninput Items
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99--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Identify item types that do not allow input• Create a display item• Create an image item• Create a sound item• Create a button• Create a calculated item• Create a hierarchical tree item
After completing this lesson, you should be able to do the following:• Identify item types that do not allow input• Create a display item• Create an image item• Create a sound item• Create a button• Create a calculated item• Create a hierarchical tree item
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99--33 Copyright Oracle Corporation, 2000. All rights reserved.
Noninput ItemsNoninput Items
Item types that do not accept direct user inputinclude:• Display items• Image items• Sound items• Buttons• Calculated items• Hierarchical tree items
Item types that do not accept direct user inputinclude:• Display items• Image items• Sound items• Buttons• Calculated items• Hierarchical tree items
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99--44 Copyright Oracle Corporation, 2000. All rights reserved.
Display ItemsDisplay Items
• Display items are similar to text items.• Display items cannot:
– Be edited– Be queried– Be navigated to– Accept user input
• Display items can:– Display data– Conserve resources
• Display items are similar to text items.• Display items cannot:
– Be edited– Be queried– Be navigated to– Accept user input
• Display items can:– Display data– Conserve resources
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99--55 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a Display ItemCreating a Display Item
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99--66 Copyright Oracle Corporation, 2000. All rights reserved.
Image ItemsImage Items
• Interface control• Use to display bitmapped images:
– From file system—supported file type– From database—LONG RAW column or a
BLOB column
• Interface control• Use to display bitmapped images:
– From file system——supported file type– From database——LONG RAW column or a
BLOB column
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99--77 Copyright Oracle Corporation, 2000. All rights reserved.
Image File FormatsImage File Formats
PICT
TPIC
CALS
TIFF
GIF
JFIF
BMP
RAS
Image itemImage item
Image filesImage files Image filesImage files
Read Write
CALS
GIF
BMP
RAS
JPG
TIFF
JFIF
JPEG
PICT
TPIC
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99--88 Copyright Oracle Corporation, 2000. All rights reserved.
Image-Specific Item PropertiesImage-Specific Item Properties
• Image Format• Image Depth• Compression Quality• Display Quality• Show Palette• Sizing Style• Show Horizontal Scrollbar• Show Vertical Scrollbar
• Image Format• Image Depth• Compression Quality• Display Quality• Show Palette• Sizing Style• Show Horizontal Scrollbar• Show Vertical Scrollbar
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99--99 Copyright Oracle Corporation, 2000. All rights reserved.
Image Manipulation PaletteImage Manipulation Palette
ZoomZoomPanPan
RotateRotate
SelectSelect
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99--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Creating an Image ItemCreating an Image Item
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99--1111 Copyright Oracle Corporation, 2000. All rights reserved.
Sound ItemsSound Items
• Interface control• Use to play and record sound:
– From file system—supported sound types– From database—LONG RAW column or BLOB
column
• Interface control• Use to play and record sound:
– From file system——supported sound types– From database——LONG RAW column or BLOB
column
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99--1212 Copyright Oracle Corporation, 2000. All rights reserved.
Sound Item Control Sound Item Control
PlayPlayPlay
RecordRecordRecord
RewindRewindRewind
FastFastFastForwardForwardForward
VolumeVolumeVolume
Time IndicatorTime IndicatorTime Indicator
SliderSliderSlider
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99--1313 Copyright Oracle Corporation, 2000. All rights reserved.
Sound TypesSound Types
AUAU
AIFFAIFF
AIFFAIFF--CC
WAVWAV
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99--1414 Copyright Oracle Corporation, 2000. All rights reserved.
Sound-Specific Item PropertiesSound-Specific Item Properties
• Sound Format• Audio Channels• Compress• Sound Quality• Show Play/Record/Rewind/Fast Forward/Volume
Control/Time Indicator/Slider Button
• Sound Format• Audio Channels• Compress• Sound Quality• Show Play/Record/Rewind/Fast Forward/Volume
Control/Time Indicator/Slider Button
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99--1515 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a Sound ItemCreating a Sound Item
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99--1616 Copyright Oracle Corporation, 2000. All rights reserved.
ButtonsButtons
• Interface control• Cannot display/represent data• Use to initiate an action• Display as:
– Text button– Iconic
• Interface control• Cannot display/represent data• Use to initiate an action• Display as:
– Text button– Iconic
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99--1717 Copyright Oracle Corporation, 2000. All rights reserved.
ButtonsButtons
• Use buttons to:– Move input focus– Display an LOV– Invoke an editor– Invoke another window– Commit data– Issue a query– Perform calculations
• Use buttons to:– Move input focus– Display an LOV– Invoke an editor– Invoke another window– Commit data– Issue a query– Perform calculations
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99--1818 Copyright Oracle Corporation, 2000. All rights reserved.
Button-Specific Item PropertiesButton-Specific Item Properties
• Label• Mouse Navigate• Default Button• Iconic• Icon Filename• Tooltip• Tooltip Visual Attribute Group
• Label• Mouse Navigate• Default Button• Iconic• Icon Filename• Tooltip• Tooltip Visual Attribute Group
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99--1919 Copyright Oracle Corporation, 2000. All rights reserved.
Tool TipTool Tip
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99--2020 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a ButtonCreating a Button
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99--2121 Copyright Oracle Corporation, 2000. All rights reserved.
Calculated ItemsCalculated Items
• They accept item values that are based on calculations.
• They are read-only.• They can be expressed as:
– Formula– Summary
• They accept item values that are based on calculations.
• They are read-only.• They can be expressed as:
– Formula– Summary
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99--2222 Copyright Oracle Corporation, 2000. All rights reserved.
Calculation ModesCalculation Modes
• Formula– A calculated item value is the result of a
horizontal calculation.– It involves bind variables.
• Summary– A calculated item value is a vertical
calculation.– A summary is performed on values of a single
item over all rows in a block.
• Formula– A calculated item value is the result of a
horizontal calculation.– It involves bind variables.
• Summary– A calculated item value is a vertical
calculation.– A summary is performed on values of a single
item over all rows in a block.
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99--2323 Copyright Oracle Corporation, 2000. All rights reserved.
Item Properties Specific to the Calculated Item
Item Properties Specific to the Calculated Item
Formula• Calculation Mode• Formula
Formula• Calculation Mode• Formula
Summary• Calculation Mode• Summary Function• Summarized Block• Summarized Item
Summary• Calculation Mode• Summary Function• Summarized Block• Summarized Item
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99--2424 Copyright Oracle Corporation, 2000. All rights reserved.
Summary FunctionsSummary Functions
• AVG• COUNT• MAX• MIN• STDDEV• SUM• VARIANCE
• AVG• COUNT• MAX• MIN• STDDEV• SUM• VARIANCE
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99--2525 Copyright Oracle Corporation, 2000. All rights reserved.
Item Based on a FormulaItem Based on a Formula
ORDERSOrder
Item id Product id Price Qty ShippedItemTotal
12
43
2001205025
5493
1,00048045075
NVL((:s_item.price * :s_item.quantity_shipped),0)NVL((:s_item.price * :s_item.quantity_shipped),0)
Item
Formulaitem
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99--2626 Copyright Oracle Corporation, 2000. All rights reserved.
Rules for Formula ItemsRules for Formula Items
• A formula item must not invoke restricted built-ins.• A formula item cannot execute any DML
statements.• Do not terminate a PL/SQL expression with a
semicolon.• Do not enter a complete PL/SQL statement in
assignment expressions.
• A formula item must not invoke restricted built-ins.• A formula item cannot execute any DML
statements.• Do not terminate a PL/SQL expression with a
semicolon.• Do not enter a complete PL/SQL statement in
assignment expressions.
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99--2727 Copyright Oracle Corporation, 2000. All rights reserved.
Item Based on a Summary Item Based on a Summary
ORDERSOrder
Item id Product id Price Qty ShippedItemTotal
12
43
2001205025
5493
1,00048045075
Item
2,005Order Total
Summarizeditem
Summaryitem
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99--2828 Copyright Oracle Corporation, 2000. All rights reserved.
Rules for Summary ItemsRules for Summary Items
• Summary item must reside in: – The same block as the summarized item– A control block with Single Record property
set to Yes• Summarized item must reside in:
– A data block with Query All Records property or Precompute Summaries property set to Yes
– A control block• Datatype of summary item must be Number,
unless using MAX or MIN
• Summary item must reside in: – The same block as the summarized item– A control block with Single Record property
set to Yes• Summarized item must reside in:
– A data block with Query All Records property or Precompute Summaries property set to Yes
– A control block• Datatype of summary item must be Number,
unless using MAX or MIN
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99--2929 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a Hierarchical TreeCreating a Hierarchical Tree
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99--3030 Copyright Oracle Corporation, 2000. All rights reserved.
Hierarchical Tree PropertiesHierarchical Tree Properties
• Allow empty branches• Multi selection• Show lines• Show symbols• Record group• Data query
• Allow empty branches• Multi selection• Show lines• Show symbols• Record group• Data query
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99--3131 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Display items• Image items• Sound items• Buttons• Calculated items• Hierarchical tree items
• Display items• Image items• Sound items• Buttons• Calculated items• Hierarchical tree items
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99--3232 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 9 OverviewPractice 9 Overview
This practice covers the following topics:• Creating display items• Creating an image item• Creating iconic buttons• Creating calculated items:
– Formula– Summary
This practice covers the following topics:• Creating display items• Creating an image item• Creating iconic buttons• Creating calculated items:
– Formula– Summary
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Copyright Oracle Corporation, 2000. All rights reserved.
Creating Windows and Content CanvasesCreating Windows and Content Canvases
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1010--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Describe windows and content canvases• Describe the relationship between windows and
content canvases
After completing this lesson, you should be able to do the following:• Describe windows and content canvases• Describe the relationship between windows and
content canvases
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1010--33 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
• Identify window and content canvas properties• Display a form module in multiple windows• Display a form module on multiple layouts
• Identify window and content canvas properties• Display a form module in multiple windows• Display a form module on multiple layouts
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1010--44 Copyright Oracle Corporation, 2000. All rights reserved.
Windows and CanvasesWindows and Canvases
• Window: Container for Form Builder visual objects
• Canvas: Surface on which you “paint” visual objectsTo see a canvas and its objects, display the canvas in a window.
• Window: Container for Form Builder visual objects
• Canvas: Surface on which you “paint” visual objectsTo see a canvas and its objects, display the canvas in a window.
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1010--55 Copyright Oracle Corporation, 2000. All rights reserved.
Window, Canvas, and ViewportWindow, Canvas, and Viewport
MDI MDI MDI parentparentparentwindowwindowwindow
DocumentDocumentDocumentwindowwindowwindow
CanvasCanvasCanvas
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1010--66 Copyright Oracle Corporation, 2000. All rights reserved.
Content CanvasContent Canvas
• “Base” canvas• View occupies entire window• Default canvas type• Each window should have at least one content
canvas
• “Base” canvas• View occupies entire window• Default canvas type• Each window should have at least one content
canvas
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1010--77 Copyright Oracle Corporation, 2000. All rights reserved.
Windows and Content CanvasesWindows and Content Canvases
Canvas 2Canvas 2 Canvas 3Canvas 3
Canvas 1Canvas 1
WindowWindow
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1010--88 Copyright Oracle Corporation, 2000. All rights reserved.
WindowsWindows
• WINDOW1:– It is created by default with each new form
module.– It is modeless.– You can delete, rename, or change its
attributes.
• WINDOW1:– It is created by default with each new form
module.– It is modeless.– You can delete, rename, or change its
attributes.
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1010--99 Copyright Oracle Corporation, 2000. All rights reserved.
WindowsWindows
• Use additional windows to:– Display two or more content canvases at once– Modularize form contents– Switch between canvases without replacing
the initial one– Take advantage of the window manager
• Two types of windows:– Modal – Modeless
• Use additional windows to:– Display two or more content canvases at once– Modularize form contents– Switch between canvases without replacing
the initial one– Take advantage of the window manager
• Two types of windows:– Modal – Modeless
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1010--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Window PropertiesWindow Properties
4
5
6
7
2
13
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1010--1111 Copyright Oracle Corporation, 2000. All rights reserved.
GUI HintsGUI Hints
• GUI hints are recommendations to the window manager about window appearance and functionality.
• If the window manager supports a specific GUI Hint and its property is set to Yes, it will be used.
• Functional properties for GUI Hints:- Close Allowed - Maximize Allowed- Move Allowed - Minimize Allowed- Resize Allowed - Inherit Menu
• GUI hints are recommendations to the window manager about window appearance and functionality.
• If the window manager supports a specific GUI Hint and its property is set to Yes, it will be used.
• Functional properties for GUI Hints:- Close Allowed - Maximize Allowed- Move Allowed - Minimize Allowed- Resize Allowed - Inherit Menu
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1010--1212 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a Content CanvasCreating a Content Canvas
• Implicitly:– Using the Layout Wizard– Using the Layout Editor
• Explicitly: Using the Create icon in theObject Navigator
• Implicitly:– Using the Layout Wizard– Using the Layout Editor
• Explicitly: Using the Create icon in theObject Navigator
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1010--1313 Copyright Oracle Corporation, 2000. All rights reserved.
Content Canvas PropertiesContent Canvas Properties
HeightHeight
WidthWidth
CanvasCanvas
Viewport X/YViewport X/YPositionPositionon canvason canvas
ViewportViewport
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1010--1414 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Describing windows and content canvases• Creating a new window• Creating a new content canvas
• Describing windows and content canvases• Creating a new window• Creating a new content canvas
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1010--1515 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 10 OverviewPractice 10 Overview
This practice covers the following topics:• Changing a window size, position, name, and title• Creating a new window• Displaying data block contents in the new window
This practice covers the following topics:• Changing a window size, position, name, and title• Creating a new window• Displaying data block contents in the new window
![Page 240: Oracle iDS Forms: Build Internet Applications I](https://reader034.vdocuments.mx/reader034/viewer/2022052301/5468ccf1af795979338b5df7/html5/thumbnails/240.jpg)
Copyright Oracle Corporation, 2000. All rights reserved.
Working with Other CanvasesWorking with Other Canvases
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1111--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Describe the different types of canvases and their
relationships to each other• Identify the appropriate canvas type for different
scenarios• Create an overlay effect by using stacked
canvases• Create a toolbar• Create a tabbed interface
After completing this lesson, you should be able to do the following:• Describe the different types of canvases and their
relationships to each other• Identify the appropriate canvas type for different
scenarios• Create an overlay effect by using stacked
canvases• Create a toolbar• Create a tabbed interface
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1111--33 Copyright Oracle Corporation, 2000. All rights reserved.
Content canvasContent canvas
Canvas TypesCanvas Types
StackedStackedcanvascanvas
Horizontal toolbarHorizontal toolbar
VerticalVerticaltoolbartoolbar
x y zTabTab
TabTabpagepage
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1111--44 Copyright Oracle Corporation, 2000. All rights reserved.
Stacked CanvasStacked Canvas
• Displayed on top of a content canvas• Shares a window with a content canvas• Size:
– Usually smaller than the content canvas in the same window
– Determined by viewport size• Created in:
– Object Navigator– Layout Editor
• Displayed on top of a content canvas• Shares a window with a content canvas• Size:
– Usually smaller than the content canvas in the same window
– Determined by viewport size• Created in:
– Object Navigator– Layout Editor
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1111--55 Copyright Oracle Corporation, 2000. All rights reserved.
Stacked Canvas PropertiesStacked Canvas Properties
1 2
3
5
4
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1111--66 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a Stacked CanvasCreating a Stacked Canvas
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1111--77 Copyright Oracle Corporation, 2000. All rights reserved.
ToolbarsToolbars
• Special type of canvas for tool items• Three types:
– Vertical toolbar– Horizontal toolbar– MDI toolbar
• Provide:– Standard look and feel– Alternative to menu or function key operation
• Special type of canvas for tool items• Three types:
– Vertical toolbar– Horizontal toolbar– MDI toolbar
• Provide:– Standard look and feel– Alternative to menu or function key operation
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1111--88 Copyright Oracle Corporation, 2000. All rights reserved.
Toolbar Related PropertiesToolbar Related Properties
• Canvas properties:– Canvas Type– Window– Width– Height
• Canvas properties:– Canvas Type– Window– Width– Height
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1111--99 Copyright Oracle Corporation, 2000. All rights reserved.
Toolbar Related PropertiesToolbar Related Properties
• Window properties:– Horizontal Toolbar Canvas– Vertical Toolbar Canvas
• Form Module properties:– Form Horizontal Toolbar Canvas– Form Vertical Toolbar Canvas
• Window properties:– Horizontal Toolbar Canvas– Vertical Toolbar Canvas
• Form Module properties:– Form Horizontal Toolbar Canvas– Form Vertical Toolbar Canvas
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1111--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Tab CanvasTab Canvas
• Enables you to organize and display related information on separate tabs
• Consists of one or more tab pages• Provides easy access to data• Created in:
– Object Navigator– Layout Editor
• Enables you to organize and display related information on separate tabs
• Consists of one or more tab pages• Provides easy access to data• Created in:
– Object Navigator– Layout Editor
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1111--1111 Copyright Oracle Corporation, 2000. All rights reserved.
Tab Canvas Related PropertiesTab Canvas Related Properties
1
2
3
4
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1111--1212 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a Tab CanvasCreating a Tab Canvas
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1111--1313 Copyright Oracle Corporation, 2000. All rights reserved.
Placing Items on a Tab CanvasPlacing Items on a Tab Canvas
• Place items on each tab page for user interaction.• Set the item properties:
– Canvas– Tab Page
• Place items on each tab page for user interaction.• Set the item properties:
– Canvas– Tab Page
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1111--1414 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Creating an overlay effect with a stacked canvas• Creating a toolbar• Creating a tab canvas
• Creating an overlay effect with a stacked canvas• Creating a toolbar• Creating a tab canvas
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1111--1515 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 11 OverviewPractice 11 Overview
This practice covers the following topics:• Creating a toolbar canvas• Creating a stacked canvas• Creating a tab canvas• Adding tab pages to the tab canvas
This practice covers the following topics:• Creating a toolbar canvas• Creating a stacked canvas• Creating a tab canvas• Adding tab pages to the tab canvas
![Page 255: Oracle iDS Forms: Build Internet Applications I](https://reader034.vdocuments.mx/reader034/viewer/2022052301/5468ccf1af795979338b5df7/html5/thumbnails/255.jpg)
Copyright Oracle Corporation, 2000. All rights reserved.
Introduction to TriggersIntroduction to Triggers
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1212--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Define triggers• Identify the different trigger categories• Plan the type and scope of triggers in a form• Describe the properties that affect the behavior of
a trigger
After completing this lesson, you should be able to do the following:• Define triggers• Identify the different trigger categories• Plan the type and scope of triggers in a form• Describe the properties that affect the behavior of
a trigger
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1212--33 Copyright Oracle Corporation, 2000. All rights reserved.
Form Builder TriggersForm Builder Triggers
EventEvent
Trigger typesTrigger types
QueriesQueries
ValidationValidation
NavigationNavigation
InteractionInteraction
Internal eventInternal event
Errors/MessagesErrors/Messages
OthersOthers
PL/SQL
FireFirePL/SQL
PL/SQL
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1212--44 Copyright Oracle Corporation, 2000. All rights reserved.
Trigger Scope ComponentTrigger Scope Component
Type
CodeLevels• Form• Block• Item
Levels• Form• Block• Item
Scope
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1212--55 Copyright Oracle Corporation, 2000. All rights reserved.
Trigger ScopeTrigger Scope
EventEvent
Event
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1212--66 Copyright Oracle Corporation, 2000. All rights reserved.
Trigger Type ComponentTrigger Type Component
TypeScope
Code
• Pre-• Post-• When-• On-• Key-
• Pre-• Post-• When-• On-• Key-
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1212--77 Copyright Oracle Corporation, 2000. All rights reserved.
Trigger Code ComponentTrigger Code Component
TypeScopeCode
• Statements• PL/SQL• User subprograms• Built-in subprograms
• Statements• PL/SQL• User subprograms• Built-in subprograms
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1212--88 Copyright Oracle Corporation, 2000. All rights reserved.
Execution HierarchyExecution Hierarchy
Formlevel
Blocklevel
Itemlevel
Event
On-Message
On-Message
On-Message
On-Error
On-Error
EH = After
EH = After
EH = Before
EH = Override
1
2
3
Event 4
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1212--99 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Trigger: Event-activated program units• Type: Defines the event that fires it• Prefixes:
– Key-– On-– Pre-– Post-– When-
• Code: PL/SQL anonymous block• Scope: Form, block, or item level
• Trigger: Event-activated program units• Type: Defines the event that fires it• Prefixes:
– Key-– On-– Pre-– Post-– When-
• Code: PL/SQL anonymous block• Scope: Form, block, or item level
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Copyright Oracle Corporation, 2000. All rights reserved.
Producing TriggersProducing Triggers
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1313--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Write trigger code• Explain the use of built-in subprograms in Oracle
Forms Developer applications• Describe the When-Button-Pressed trigger• Describe the When-Window-Closed trigger
After completing this lesson, you should be able to do the following:• Write trigger code• Explain the use of built-in subprograms in Oracle
Forms Developer applications• Describe the When-Button-Pressed trigger• Describe the When-Window-Closed trigger
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1313--33 Copyright Oracle Corporation, 2000. All rights reserved.
Creating a TriggerCreating a Trigger
Smart Triggers
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1313--44 Copyright Oracle Corporation, 2000. All rights reserved.
Trigger PropertiesTrigger Properties
GeneralGeneral
FunctionalFunctional
HelpHelp
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1313--55 Copyright Oracle Corporation, 2000. All rights reserved.
PL/SQL EditorPL/SQL Editor
Split viewSplit view
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1313--66 Copyright Oracle Corporation, 2000. All rights reserved.
PL/SQL Editor Syntax PalettePL/SQL Editor Syntax Palette
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1313--77 Copyright Oracle Corporation, 2000. All rights reserved.
Database Trigger EditorDatabase Trigger Editor
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1313--88 Copyright Oracle Corporation, 2000. All rights reserved.
Trigger PL/SQL BlocksTrigger PL/SQL Blocks.BEGIN
.END;
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1313--99 Copyright Oracle Corporation, 2000. All rights reserved.
Variables in Form BuilderVariables in Form Builder
• PL/SQL variables must be declared in a trigger or defined in a package
• Form Builder variables– Are not formally declared in PL/SQL– Need a colon prefix in reference
• PL/SQL variables must be declared in a trigger or defined in a package
• Form Builder variables– Are not formally declared in PL/SQL– Need a colon prefix in reference
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1313--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Form Builder VariablesForm Builder Variables
• ItemsFor presentation and user interaction
• Global variablesSession-wide character variable
• System variablesForm status and control
• ParametersPassing values in and out of module
• ItemsFor presentation and user interaction
• Global variablesSession-wide character variable
• System variablesForm status and control
• ParametersPassing values in and out of module
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1313--1111 Copyright Oracle Corporation, 2000. All rights reserved.
Syntax of VariablesSyntax of Variables
• :block_name.item_name• :GLOBAL.variable_name• :SYSTEM.variable_name• :PARAMETER.name
• :block_name.item_name• :GLOBAL.variable_name• :SYSTEM.variable_name• :PARAMETER.name
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1313--1212 Copyright Oracle Corporation, 2000. All rights reserved.
Form Builder Built-in Subprograms
Form Builder Built-in Subprograms
Built-ins belong to either:• The Standard Extensions package where no prefix
is required• Another Form Builder package where a prefix is
required
Built-ins belong to either:• The Standard Extensions package where no prefix
is required• Another Form Builder package where a prefix is
required
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1313--1313 Copyright Oracle Corporation, 2000. All rights reserved.
Limits of UseLimits of Use
• Unrestricted built-ins are allowed in any trigger or subprogram.
• Restricted built-ins are allowed only in certain triggers and subprograms called from such triggers.
• Consult the Help system.
• Unrestricted built-ins are allowed in any trigger or subprogram.
• Restricted built-ins are allowed only in certain triggers and subprograms called from such triggers.
• Consult the Help system.
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1313--1414 Copyright Oracle Corporation, 2000. All rights reserved.
1
Using Built-in DefinitionsUsing Built-in Definitions
2
3
4
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1313--1515 Copyright Oracle Corporation, 2000. All rights reserved.
Useful Built-InsUseful Built-Ins
• EDIT_TEXTITEM• ENTER_QUERY, EXECUTE_QUERY• EXIT_FORM• GO_BLOCK, GO_ ITEM• GET_ITEM_PROPERTY, SET_ITEM_PROPERTY• MESSAGE• SHOW_ALERT, SHOW_ EDITOR, SHOW_ LOV• SHOW_VIEW, HIDE_VIEW
• EDIT_TEXTITEM• ENTER_QUERY, EXECUTE_QUERY• EXIT_FORM• GO_BLOCK, GO_ ITEM• GET_ITEM_PROPERTY, SET_ITEM_PROPERTY• MESSAGE• SHOW_ALERT, SHOW_ EDITOR, SHOW_ LOV• SHOW_VIEW, HIDE_VIEW
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1313--1616 Copyright Oracle Corporation, 2000. All rights reserved.
When-Button-Pressed Trigger
When-Button-Pressed Trigger
• Fires when the operator clicks a button.• Accepts restricted and unrestricted
built-ins.• Use to provide convenient navigation, to display
LOVs and many other frequently used functions.
• Fires when the operator clicks a button.• Accepts restricted and unrestricted
built-ins.• Use to provide convenient navigation, to display
LOVs and many other frequently used functions.
ExampleExampleGO_BLOCK(‘Stock’);EXECUTE_QUERY;
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1313--1717 Copyright Oracle Corporation, 2000. All rights reserved.
When-Window-ClosedTrigger
When-Window-ClosedTrigger
• Fires when the operator closes a window by using a window manager-specific close command.
• Accepts restricted and unrestricted built-ins.• Used to programmatically close a window when
the operator issues a window manager-specific close command. You can close a window by using built-ins.
• Fires when the operator closes a window by using a window manager-specific close command.
• Accepts restricted and unrestricted built-ins.• Used to programmatically close a window when
the operator issues a window manager-specific close command. You can close a window by using built-ins.
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1313--1818 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
To produce a trigger:1. Select a scope in the Object Navigator.2. Create a trigger and select a Name from the LOV,
or use the SmartTriggers menu option.3. Define code in the PL/SQL Editor.4. Compile.
To produce a trigger:1. Select a scope in the Object Navigator.2. Create a trigger and select a Name from the LOV,
or use the SmartTriggers menu option.3. Define code in the PL/SQL Editor.4. Compile.
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1313--1919 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Find built-ins in the Navigator under Built-in Packages: – Paste built-in name and arguments to your
code by using the Paste Name and Arguments option.
– Refer to online Help.• The When-Button-Pressed trigger provides a wide
range of functionality to users.• Use the When-Window-Closed trigger to provide
functionality when the user issues a window manager-specific close command.
• Find built-ins in the Navigator under Built-in Packages: – Paste built-in name and arguments to your
code by using the Paste Name and Arguments option.
– Refer to online Help.• The When-Button-Pressed trigger provides a wide
range of functionality to users.• Use the When-Window-Closed trigger to provide
functionality when the user issues a window manager-specific close command.
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1313--2020 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 13 OverviewPractice 13 Overview
This practice covers the following topics:• Using built-ins to display LOVs• Using the When-Button-Pressed and
When-Window-Closed triggers to add functionality to items
• Using built-ins to display and hide the Help stack canvas
This practice covers the following topics:• Using built-ins to display LOVs• Using the When-Button-Pressed and
When-Window-Closed triggers to add functionality to items
• Using built-ins to display and hide the Help stack canvas
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Copyright Oracle Corporation, 2000. All rights reserved.
Debugging TriggersDebugging Triggers
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1414--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Describe the components of the Debugger• Run a form module in debug mode• Debug PL/SQL code
After completing this lesson, you should be able to do the following:• Describe the components of the Debugger• Run a form module in debug mode• Debug PL/SQL code
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1414--33 Copyright Oracle Corporation, 2000. All rights reserved.
Debugging TriggersDebugging Triggers
Monitor and debug triggers by:• Compiling correct errors in the PL/SQL Editor• Displaying debug messages at run time• Invoking the PL/SQL Debugger
Monitor and debug triggers by:• Compiling correct errors in the PL/SQL Editor• Displaying debug messages at run time• Invoking the PL/SQL Debugger
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1414--44 Copyright Oracle Corporation, 2000. All rights reserved.
Debugging TipsDebugging Tips
• Connect to the database for SQL compilation.• The line that fails is not always responsible.• Watch for missing semicolons and quotation
marks.• Define triggers at the correct level.• Place triggers where the event will happen.
• Connect to the database for SQL compilation.• The line that fails is not always responsible.• Watch for missing semicolons and quotation
marks.• Define triggers at the correct level.• Place triggers where the event will happen.
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1414--55 Copyright Oracle Corporation, 2000. All rights reserved.
Running a Form in Debug ModeRunning a Form in Debug Mode
Run FormRun FormDebugDebug
Contains source Contains source code andcode andexecutable run fileexecutable run file
.FMX
(Compiles automatically)(Compiles automatically)
(Runs automatically)(Runs automatically)
Run Form inRun Form inDebug ModeDebug Mode
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1414--66 Copyright Oracle Corporation, 2000. All rights reserved.
PL/SQL DebuggerPL/SQL Debugger
1
2
3
4
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1414--77 Copyright Oracle Corporation, 2000. All rights reserved.
PL/SQL DebuggerPL/SQL Debugger
6 7 8 9 105
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1414--88 Copyright Oracle Corporation, 2000. All rights reserved.
Invoking the Debugger and BreakpointsInvoking the Debugger and Breakpoints
Debug Debug modemode
1
2
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1414--99 Copyright Oracle Corporation, 2000. All rights reserved.
Breakpoint and Debug TriggersBreakpoint and Debug Triggers
EveryEverystatementstatement
Debugger
Program UnitProgram Unit
Statement
Statement
Statement
Debugtrigger
Breakpointtrigger
Fire
Fire
Fire
Breakpoint
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1414--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Debug TriggersDebug Triggers
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1414--1111 Copyright Oracle Corporation, 2000. All rights reserved.
Debug CommandsDebug Commands
Step overStep over
StepStepoutout
ResetReset
GOGO
1
2 StepStepintointo
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1414--1212 Copyright Oracle Corporation, 2000. All rights reserved.
Debug ExampleDebug Example
…calls...…calls...
Debug Example
The results are: ??WHENWHEN--BUTTONBUTTON--PRESSEDPRESSED
1
Procedure XYZ;
Function ABC;
23
4
5
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1414--1313 Copyright Oracle Corporation, 2000. All rights reserved.
Debugger: Setting a BreakpointDebugger: Setting a Breakpoint
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1414--1414 Copyright Oracle Corporation, 2000. All rights reserved.
Debugger: Stepping into CodeDebugger: Stepping into Code
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1414--1515 Copyright Oracle Corporation, 2000. All rights reserved.
Debugger: Checking VariablesDebugger: Checking Variables
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1414--1616 Copyright Oracle Corporation, 2000. All rights reserved.
Corrected CodeCorrected Code
FUNCTION abc (abc_param IN NUMBER) RETURN NUMBER
IS
v_total NUMBER := 0;
v_num3 NUMBER := 3;
v_num6 NUMBER := 6;
/*-- changed value to 6
*/
BEGIN
v_total := v_num3 * v_num6;
v_total := v_total + abc_param;
RETURN v_total;
END abc;
FUNCTION abc (abc_param IN NUMBER) RETURN NUMBER
IS
v_total NUMBER := 0;
v_num3 NUMBER := 3;
v_num6 NUMBER := 6;
/*-- changed value to 6
*/
BEGIN
v_total := v_num3 * v_num6;
v_total := v_total + abc_param;
RETURN v_total;
END abc;
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1414--1717 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• To debug a form: Use the Run Form Debug button, and set breakpoints.
• Debug commands can be entered in the Interpreter pane or by using buttons.
• Set breakpoints to invoke the Debugger.• Break and Debug triggers are available to program
Debug Actions on events in the form.
• To debug a form: Use the Run Form Debug button, and set breakpoints.
• Debug commands can be entered in the Interpreter pane or by using buttons.
• Set breakpoints to invoke the Debugger.• Break and Debug triggers are available to program
Debug Actions on events in the form.
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1414--1818 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 14 OverviewPractice 14 Overview
This practice covers using the Debugger to help solve problems at run time.This practice covers using the Debugger to help solve problems at run time.
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Copyright Oracle Corporation, 2000. All rights reserved.
Adding Functionality to ItemsAdding Functionality to Items
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1515--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Supplement the functionality of input items by
using triggers and built-ins• Supplement the functionality of
noninput items by using triggers and built-ins
After completing this lesson, you should be able to do the following:• Supplement the functionality of input items by
using triggers and built-ins• Supplement the functionality of
noninput items by using triggers and built-ins
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1515--33 Copyright Oracle Corporation, 2000. All rights reserved.
Item Interaction TriggersItem Interaction Triggers
When-Button-Pressed
When-Checkbox-Changed
When-Radio-Changed
When-Image-Pressed
When-Image-Activated
When-List-Changed
When-List-Activated
When-Tree-Node-Activated
When-Tree-Node-Expanded
When-Tree-Node-Selected
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1515--44 Copyright Oracle Corporation, 2000. All rights reserved.
Coding Item Interaction TriggersCoding Item Interaction Triggers
• Valid commands:– SELECT statements– Standard PL/SQL constructs– All built-in subprograms
• Use When-Validate-“object” to trap the operator during validation.
• Valid commands:– SELECT statements– Standard PL/SQL constructs– All built-in subprograms
• Use When-Validate-“object” to trap the operator during validation.
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1515--55 Copyright Oracle Corporation, 2000. All rights reserved.
When-Checkbox-ChangedWhen-Checkbox-Changed
Interacting with Check BoxesInteracting with Check Boxes
IF CHECKBOX_CHECKED(’S_ORD.order_filled’) THEN
SET_ITEM_PROPERTY(’S_ORD.date_shipped’,
UPDATE_ALLOWED, PROPERTY_FALSE);
ELSE
SET_ITEM_PROPERTY(’S_ORD.date_shipped’,
UPDATE_ALLOWED, PROPERTY_TRUE);
END IF;
IF CHECKBOX_CHECKED(’S_ORD.order_filled’) THEN
SET_ITEM_PROPERTY(’S_ORD.date_shipped’,
UPDATE_ALLOWED, PROPERTY_FALSE);
ELSE
SET_ITEM_PROPERTY(’S_ORD.date_shipped’,
UPDATE_ALLOWED, PROPERTY_TRUE);
END IF;
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1515--66 Copyright Oracle Corporation, 2000. All rights reserved.
Changing List Items at Run TimeChanging List Items at Run Time
ADD_LIST_ELEMENTADD_LIST_ELEMENT
DELETE_LIST_ELEMENTDELETE_LIST_ELEMENT
Excellent
Excellent
Good
Poor
Index
1
2
3
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1515--77 Copyright Oracle Corporation, 2000. All rights reserved.
Displaying LOVs from ButtonsDisplaying LOVs from Buttons
• Uses:– Convenient alternative for accessing LOVs– Can display independently of text items
• Needs:– When-Button-Pressed trigger– LIST_VALUES or SHOW_LOV built-in
• Uses:– Convenient alternative for accessing LOVs– Can display independently of text items
• Needs:– When-Button-Pressed trigger– LIST_VALUES or SHOW_LOV built-in
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1515--88 Copyright Oracle Corporation, 2000. All rights reserved.
LOVs and ButtonsLOVs and Buttons
Employee_IdLOV button
IF SHOW_LOV(’myLov’)
THEN...
IF SHOW_LOV(’myLov’)
THEN...
When-Button-PressedName DarylJayne ChristianClaudiaSergeiLisaPam
ID 101102 103104105106107
105
Employees (LOV)
105
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1515--99 Copyright Oracle Corporation, 2000. All rights reserved.
v
^
Populating Image ItemsPopulating Image Items
DatabaseDatabase
Fetch on query
Image file in the Image file in the file systemfile system
WRITE_IMAGE_FILE
READ_IMAGE_FILE
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1515--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Loading the Right ImageLoading the Right Image
READ_IMAGE_FILE(
’F_’||TO_CHAR(:S_ITEM.product_id)||’.BMP’,
’BMP’,
’S_ITEM.product_image’ );
READ_IMAGE_FILE(
’F_’||TO_CHAR(:S_ITEM.product_id)||’.BMP’,
’BMP’,
’S_ITEM.product_image’ );
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1515--1111 Copyright Oracle Corporation, 2000. All rights reserved.
Interacting with Sound ItemsInteracting with Sound Items
GET_ITEM_PROPERTY and SET_ITEM_PROPERTY:• SHOW_FAST_FORWARD_BUTTON• SHOW_PLAY_BUTTON• SHOW_RECORD_BUTTON• SHOW_REWIND_BUTTON• SHOW_SLIDER• SHOW_TIME_INDICATOR• SHOW_VOLUME_CONTROL
GET_ITEM_PROPERTY and SET_ITEM_PROPERTY:• SHOW_FAST_FORWARD_BUTTON• SHOW_PLAY_BUTTON• SHOW_RECORD_BUTTON• SHOW_REWIND_BUTTON• SHOW_SLIDER• SHOW_TIME_INDICATOR• SHOW_VOLUME_CONTROL
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1515--1212 Copyright Oracle Corporation, 2000. All rights reserved.
Populating Hierarchy TreesPopulating Hierarchy Trees
SET_TREE_PROPERTY
DatabaseDatabase
WhenWhen--NewNew--FormForm--InstanceInstance
CREATE_GROUP_FROM_QUERY
Record GroupRecord Group
CarFordVolvoVWToyota
-
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1515--1313 Copyright Oracle Corporation, 2000. All rights reserved.
Displaying Hierarchy TreesDisplaying Hierarchy Trees
WHEN-NEW-FORM-INSTANCEWHEN-NEW-FORM-INSTANCE
rg_emps := create_group_from_query(‘rg_emps’
‘select 1, level, last_name, NULL,
to_char(id) ‘ ||
‘from s_emp ‘ ||
‘connect by prior id= manager_id ‘||
‘start with title = ‘‘President’’’);
v_ignore := populate_group(rg_emps);
ftree.set_tree_property(‘block4.tree5’,
ftree.record_group, rg_emps);
rg_emps := create_group_from_query(‘rg_emps’
‘select 1, level, last_name, NULL,
to_char(id) ‘ ||
‘from s_emp ‘ ||
‘connect by prior id= manager_id ‘||
‘start with title = ‘‘President’’’);
v_ignore := populate_group(rg_emps);
ftree.set_tree_property(‘block4.tree5’,
ftree.record_group, rg_emps);
create_group_from_query(‘rg_emps’,
‘select 1, level, last_name, NULL,
to_char(id) ‘ ||
‘from s_emp ‘ ||
‘connect by prior id= manager_id ‘||
‘start with title = ‘‘President’’’);
set_tree_property
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1515--1414 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Item interaction triggers accept SELECT statements and other standard PL/SQL constructs.
• You use built-ins for check boxes, LOV control, list item control, image file reading, hierarchical tree, and sound item control.
• Item interaction triggers accept SELECT statements and other standard PL/SQL constructs.
• You use built-ins for check boxes, LOV control, list item control, image file reading, hierarchical tree, and sound item control.
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1515--1515 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 15 OverviewPractice 15 Overview
This practice covers the following topics:• Writing a trigger to check whether the customer’s
credit rating forces him to pay cash• Creating a toolbar button to display and hide
product images
This practice covers the following topics:• Writing a trigger to check whether the customer’s
credit rating forces him to pay cash• Creating a toolbar button to display and hide
product images
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Copyright Oracle Corporation, 2000. All rights reserved.
Runform Messages and AlertsRunform Messages and Alerts
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1616--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Describe the default messaging • Handle errors using built-in subprograms• Identify the different types of Form Builder
messages• Control system messages• Create and control alerts
After completing this lesson, you should be able to do the following:• Describe the default messaging • Handle errors using built-in subprograms• Identify the different types of Form Builder
messages• Control system messages• Create and control alerts
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1616--33 Copyright Oracle Corporation, 2000. All rights reserved.
Communicating with the OperatorCommunicating with the Operator
System Application
AlertsAlerts
MessagesMessagesInformative
ErrorWorking
Application
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1616--44 Copyright Oracle Corporation, 2000. All rights reserved.
Detecting Run Time ErrorsDetecting Run Time Errors
• FORM_SUCCESS– TRUE: Action successful– FALSE: Error/Fatal error occurred
• FORM_FAILURE– TRUE: A nonfatal error occurred– FALSE: No error/No fatal error
• FORM_FATAL– TRUE: A fatal error occurred– FALSE: No error/No nonfatal error
• FORM_SUCCESS– TRUE: Action successful– FALSE: Error/Fatal error occurred
• FORM_FAILURE– TRUE: A nonfatal error occurred– FALSE: No error/No fatal error
• FORM_FATAL– TRUE: A fatal error occurred– FALSE: No error/No nonfatal error
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1616--55 Copyright Oracle Corporation, 2000. All rights reserved.
Errors and Built-insErrors and Built-ins
• Built-in failure does not cause an exception.• Test built-in success with FORM_SUCCESS
function.IF FORM_SUCCESS THEN . . .
• What went wrong?– ERROR_CODE, ERROR_TEXT, ERROR_TYPE– MESSAGE _CODE, MESSAGE _TEXT,
MESSAGE _TYPE
• Built-in failure does not cause an exception.• Test built-in success with FORM_SUCCESS
function.IF FORM_SUCCESS THEN . . .
• What went wrong?– ERROR_CODE, ERROR_TEXT, ERROR_TYPE– MESSAGE _CODE, MESSAGE _TEXT,
MESSAGE _TYPE
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1616--66 Copyright Oracle Corporation, 2000. All rights reserved.
Message Severity LevelsMessage Severity Levels
>25
2020
1515
1010
55
00
2525
All (default)All (default)
More criticalMore critical
Define by:Define by:
:SYSTEM.MESSAGE_LEVEL:SYSTEM.MESSAGE_LEVEL
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1616--77 Copyright Oracle Corporation, 2000. All rights reserved.
Suppressing MessagesSuppressing Messages
:SYSTEM.MESSAGE_LEVEL := ’5’;
UP;
IF NOT FORM_SUCCESS THEN
MESSAGE(’Already at the first Order’);
END IF;
:SYSTEM.MESSAGE_LEVEL := ’0’;
:SYSTEM.MESSAGE_LEVEL := ’5’;
UP;
IF NOT FORM_SUCCESS THEN
MESSAGE(’Already at the first Order’);
END IF;
:SYSTEM.MESSAGE_LEVEL := ’0’;
:SYSTEM.SUPPRESS_WORKING := ’TRUE’;:SYSTEM.SUPPRESS_WORKING := ’TRUE’;
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1616--88 Copyright Oracle Corporation, 2000. All rights reserved.
FORM_TRIGGER_FAILUREFORM_TRIGGER_FAILUREBEGINBEGIN
--RAISE form_trigger_failure;--
--RAISE form_trigger_failure;--
EXCEPTIONEXCEPTION
--WHEN <exception> THENRAISE form_trigger_failure;--
--WHEN <exception> THENRAISE form_trigger_failure;--
Fail trigger
END;END;
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1616--99 Copyright Oracle Corporation, 2000. All rights reserved.
Error TriggersError Triggers
• On-Error:– Fires when a system error message is issued– Is used to trap Form Builder and Oracle Server
errors, and to customize error messages• On-Message:
– Fires when an informative system message is issued
– Is used to suppress or customize specific messages
• On-Error:– Fires when a system error message is issued– Is used to trap Form Builder and Oracle Server
errors, and to customize error messages• On-Message:
– Fires when an informative system message is issued
– Is used to suppress or customize specific messages
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1616--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Handling Informative MessagesHandling Informative Messages
• On-Message trigger• Built-in functions:
– MESSAGE_CODE– MESSAGE_TEXT– MESSAGE_TYPE
• On-Message trigger• Built-in functions:
– MESSAGE_CODE– MESSAGE_TEXT– MESSAGE_TYPE
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1616--1111 Copyright Oracle Corporation, 2000. All rights reserved.
Alert PropertiesAlert Properties
654
21
3
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1616--1212 Copyright Oracle Corporation, 2000. All rights reserved.
Planning AlertsPlanning Alerts
Yes/NoYes/Noquestionsquestions
Yes/No/CancelYes/No/Cancelquestionsquestions
CautionCautionmessagesmessages
InformativeInformativemessagesmessages
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1616--1313 Copyright Oracle Corporation, 2000. All rights reserved.
Controlling AlertsControlling Alerts
SET_ALERT_PROPERTYSET_ALERT_PROPERTYSET_ALERT_BUTTON_PROPERTYSET_ALERT_BUTTON_PROPERTY
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1616--1414 Copyright Oracle Corporation, 2000. All rights reserved.
SHOW_ALERT FunctionSHOW_ALERT Function
•IF SHOW_ALERT(’del_Check’)=ALERT_BUTTON1 THEN
. . .
•IF SHOW_ALERT(’del_Check’)=ALERT_BUTTON1 THEN
. . .
Alert_Button1Alert_Button1
Alert_Button2Alert_Button2Alert_Button3Alert_Button3
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1616--1515 Copyright Oracle Corporation, 2000. All rights reserved.
Directing Errors to an AlertDirecting Errors to an Alert
PROCEDURE Alert_On_Failure IS
n NUMBER;
BEGIN
SET_ALERT_PROPERTY(’error_alert’,
ALERT_MESSAGE_TEXT,ERROR_TYPE||
’-’||TO_CHAR(ERROR_CODE)||
’: ’||ERROR_TEXT);
n := SHOW_ALERT(’error_alert’);
END;
PROCEDURE Alert_On_Failure IS
n NUMBER;
BEGIN
SET_ALERT_PROPERTY(’error_alert’,
ALERT_MESSAGE_TEXT,ERROR_TYPE||
’-’||TO_CHAR(ERROR_CODE)||
’: ’||ERROR_TEXT);
n := SHOW_ALERT(’error_alert’);
END;
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1616--1616 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Application and system messages appear on message line.
• Test for built-in failure by using FORM_SUCCESS or other built-in functions.
• Set system variables to suppress system messages: MESSAGE_LEVEL and SUPPRESS_WORKING.
• Application and system messages appear on message line.
• Test for built-in failure by using FORM_SUCCESS or other built-in functions.
• Set system variables to suppress system messages: MESSAGE_LEVEL and SUPPRESS_WORKING.
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1616--1717 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• On-Error trigger intercepts system error messages.
• On-Message trigger intercepts system informative messages.
• Alert types: Stop, Caution, and Note• Up to three buttons are available for operator
response.• Display alerts with SHOW_ALERT.• Change alert message with
SET_ALERT_PROPERTY.
• On-Error trigger intercepts system error messages.
• On-Message trigger intercepts system informative messages.
• Alert types: Stop, Caution, and Note• Up to three buttons are available for operator
response.• Display alerts with SHOW_ALERT.• Change alert message with
SET_ALERT_PROPERTY.
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1616--1818 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 16 OverviewPractice 16 Overview
This practice covers the following topics:• Using an alert to inform the operator that the
customer must pay cash• Using a generic alert to ask the operator to
confirm that the form should terminate
This practice covers the following topics:• Using an alert to inform the operator that the
customer must pay cash• Using a generic alert to ask the operator to
confirm that the form should terminate
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Copyright Oracle Corporation, 2000. All rights reserved.
Query TriggersQuery Triggers
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Copyright Oracle Corporation, 2000. All rights reserved.1717--22
ObjectivesObjectives
After completing this lesson, you should be able to do the following: • Explain the processes involved in querying a data
block• Describe query triggers and their scope• Write triggers to supplement query results and
screen query conditions• Control trigger action based on the form query
status
After completing this lesson, you should be able to do the following: • Explain the processes involved in querying a data
block• Describe query triggers and their scope•• Write triggers Write triggers to supplement query results and
screen query conditionsscreen query conditions• Control trigger action based on the form query
status
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Copyright Oracle Corporation, 2000. All rights reserved.1717--33
Construct SELECT...Construct SELECT...
Perform queryPerform query
Fetch a row into a new recordFetch a row into a new record
Mark record as validMark record as valid
Fire Post-Query triggerFire Post-Query trigger
Validate any record changesValidate any record changes
Abort queryAbort queryon failureon failure
Query ProcessingQuery Processing
FlushFlushrecordrecord
on failureon failure
Fire Pre-Query triggerFire Pre-Query trigger
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Copyright Oracle Corporation, 2000. All rights reserved.1717--44
SELECT Statements IssuedSELECT Statements Issued
SELECT base_column, ..., ROWID
INTO :base_item, ..., :ROWID
FROM base_table
WHERE default_where_clause
AND (example_record_conditions)
AND (query_where_conditions)
ORDER BY default_order_by_clause |
query_where_order_by
SELECT base_column, ..., ROWID
INTO :base_item, ..., :ROWID
FROM base_table
WHERE default_where_clause
AND (example_record_conditions)
AND (query_where_conditions)
ORDER BY default_order_by_clause |
query_where_order_by
Slightly different for COUNTSlightly different for COUNT
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Copyright Oracle Corporation, 2000. All rights reserved.1717--55
WHERE ClauseWHERE Clause
• Three sources for the WHERE clause:– WHERE clause block property– Example Record– Query/Where dialog box
• WHERE clauses are combined by the AND operator
• Three sources for the WHERE clause:– WHERE clause block property– Example Record– Query/Where dialog box
• WHERE clauses are combined by the AND operator
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Copyright Oracle Corporation, 2000. All rights reserved.1717--66
ORDER BY ClauseORDER BY Clause
• Two sources for the ORDER BY clause:– ORDER BY clause block property– Query/Where dialog box
• Second source for ORDER BY clause overrides the first one
• Two sources for the ORDER BY clause:– ORDER BY clause block property– Query/Where dialog box
• Second source for ORDER BY clause overrides the first one
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Copyright Oracle Corporation, 2000. All rights reserved.1717--77
Pre-Query TriggerPre-Query Trigger
IF TO_CHAR(:S_ORD.ID)||
TO_CHAR(:S_ORD.DATE_ORDERED)||
TO_CHAR(:S_ORD.DATE_SHIPPED)
IS NULL THEN
MESSAGE(’You must query by
Order ID or Date’);
RAISE form_trigger_failure;
END IF;
IF TO_CHAR(:S_ORD.ID)||
TO_CHAR(:S_ORD.DATE_ORDERED)||
TO_CHAR(:S_ORD.DATE_SHIPPED)
IS NULL THEN
MESSAGE(’You must query by
Order ID or Date’);
RAISE form_trigger_failure;
END IF;
• Defined at block level• Fires once, before query is performed• Defined at block level• Fires once, before query is performed
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Copyright Oracle Corporation, 2000. All rights reserved.1717--88
Post-Query TriggerPost-Query Trigger
SELECT COUNT(ord_id)
INTO :S_ORD.lineitem_count
FROM S_ITEM
WHERE ord_id = :S_ORD.id;
SELECT COUNT(ord_id)
INTO :S_ORD.lineitem_count
FROM S_ITEM
WHERE ord_id = :S_ORD.id;
• Fires for each fetched record (except during array processing)
• Use to populate nondatabase items and calculate statistics
• Fires for each fetched record (except during array processing)
• Use to populate nondatabase items and calculate statistics
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Copyright Oracle Corporation, 2000. All rights reserved.1717--99
Using SELECT Statements in TriggersUsing SELECT Statements in Triggers
• Form Builder variables are preceded by a colon.• The query must return one row for success.• Code exception handlers.• The INTO clause is mandatory, with a variable for
each selected column or expression.• ORDER BY is not relevant.
• Form Builder variables are preceded by a colon.• The query must return one row for success.• Code exception handlers.• The INTO clause is mandatory, with a variable for
each selected column or expression.• ORDER BY is not relevant.
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Copyright Oracle Corporation, 2000. All rights reserved.1717--1010
Query Array ProcessingQuery Array Processing
• Reduces network traffic• Enables Query Array processing:
– Enable Array Processing option– Set Query Array Size property
• Query Array Size property• Query All Records property
• Reduces network traffic• Enables Query Array processing:
– Enable Array Processing option– Set Query Array Size property
• Query Array Size property• Query All Records property
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Copyright Oracle Corporation, 2000. All rights reserved.1717--1111
Coding for ENTER-QUERY Mode
Coding for ENTER-QUERY Mode
• Some triggers may fire in Enter-Query mode.• Set to fire in Enter-Query Mode property.• Test mode during execution with :SYSTEM.MODE
– NORMAL– ENTER-QUERY– QUERY
• Some triggers may fire in Enter-Query mode.• Set to fire in Enter-Query Mode property.• Test mode during execution with :SYSTEM.MODE
– NORMAL– ENTER-QUERY– QUERY
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Copyright Oracle Corporation, 2000. All rights reserved.1717--1212
Coding for ENTER-QUERY Mode
Coding for ENTER-QUERY Mode
• Example
• Some built-ins are illegal.• Consult online Help.• You cannot navigate to another record in the
current form.
• Example
• Some built-ins are illegal.• Consult online Help.• You cannot navigate to another record in the
current form.
IF :SYSTEM.MODE = ’NORMAL’
THEN ENTER_QUERY;
ELSE EXECUTE_QUERY;
END IF;
IF :SYSTEM.MODE = ’NORMAL’
THEN ENTER_QUERY;
ELSE EXECUTE_QUERY;
END IF;
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Copyright Oracle Corporation, 2000. All rights reserved.1717--1313
Overriding Default Query ProcessingOverriding Default Query Processing
Do-the-Right-Thing Built-in
COUNT_QUERY
FETCH_RECORDS
SELECT_RECORDS
Trigger
On-Close
On-Count
On-Fetch
Pre-Select
On-Select
Post-Select
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Copyright Oracle Corporation, 2000. All rights reserved.1717--1414
Overriding Default Query ProcessingOverriding Default Query Processing
• On-Fetch continues to fire until:– It fires without executing
CREATE_QUERIED_RECORD.– The query is closed by the user or by
ABORT_QUERY.– It raises FORM_TRIGGER_FAILURE.
• On-Select replaces open cursor, parse, and execute phases.
• On-Fetch continues to fire until:– It fires without executing
CREATE_QUERIED_RECORD.– The query is closed by the user or by
ABORT_QUERY.– It raises FORM_TRIGGER_FAILURE.
• On-Select replaces open cursor, parse, and execute phases.
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Copyright Oracle Corporation, 2000. All rights reserved.1717--1515
Obtaining Query Information at Run TimeObtaining Query Information at Run Time
• SYSTEM.MODE• SYSTEM.LAST_QUERY
– Contains bind variables (ORD_ID = :1) before SELECT_RECORDS
– Contains actual values (ORD_ID = 102) after SELECT_RECORDS
• SYSTEM.MODE• SYSTEM.LAST_QUERY
– Contains bind variables (ORD_ID = :1) before SELECT_RECORDS
– Contains actual values (ORD_ID = 102) after SELECT_RECORDS
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Copyright Oracle Corporation, 2000. All rights reserved.1717--1616
Obtaining Query Information at Run TimeObtaining Query Information at Run Time
• GET_BLOCK_PROPERTY SET_BLOCK_PROPERTY– Get and set:
DEFAULT_WHEREORDER_BYQUERY_ALLOWEDQUERY_HITS
– Get only:QUERY_OPTIONSRECORDS_TO_FETCH
• GET_BLOCK_PROPERTY SET_BLOCK_PROPERTY– Get and set:
DEFAULT_WHEREORDER_BYQUERY_ALLOWEDQUERY_HITS
– Get only:QUERY_OPTIONSRECORDS_TO_FETCH
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Copyright Oracle Corporation, 2000. All rights reserved.1717--1717
Obtaining Query Information at Run TimeObtaining Query Information at Run Time
• GET_ITEM_PROPERTY SET_ITEM_PROPERTY– Get and set:
CASE_INSENSITIVE_QUERYQUERYABLEQUERY_ONLY
– Get only:QUERY_LENGTH
• GET_ITEM_PROPERTY SET_ITEM_PROPERTY– Get and set:
CASE_INSENSITIVE_QUERYQUERYABLEQUERY_ONLY
– Get only:QUERY_LENGTH
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Copyright Oracle Corporation, 2000. All rights reserved.1717--1818
SummarySummary
• A Pre-Query trigger fires before a query executes. Use it to check or modify query conditions.
• A Post-Query trigger fires as each record is fetched (except array processing). Use it to perform calculations and populate additional items.
• A Pre-Query trigger fires before a query executes. Use it to check or modify query conditions.
• A Post-Query trigger fires as each record is fetched (except array processing). Use it to perform calculations and populate additional items.
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Copyright Oracle Corporation, 2000. All rights reserved.1717--1919
SummarySummary
• Some triggers can fire in both Normal and Enter Query modes:– Test the current mode with SYSTEM.MODE.– Some built-ins are illegal in Enter Query mode.
• Obtain query information at run time:– SYSTEM.MODE – SYSTEM.LAST_QUERY
• Some triggers can fire in both Normal and Enter Query modes:– Test the current mode with SYSTEM.MODE.– Some built-ins are illegal in Enter Query mode.
• Obtain query information at run time:– SYSTEM.MODE – SYSTEM.LAST_QUERY
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Copyright Oracle Corporation, 2000. All rights reserved.1717--2020
Practice 17 OverviewPractice 17 Overview
This practice covers the following topics:• Populating customer names and sales
representative names for each row of the S_ORD block
• Populating descriptions for each row of the S_ITEM block
• Disabling the effect of the Exit button in Enter Query mode
• Adding two check boxes to enable case-sensitive and exact match query
This practice covers the following topics:• Populating customer names and sales
representative names for each row of the S_ORD block
• Populating descriptions for each row of the S_ITEM block
• Disabling the effect of the Exit button in Enter Query mode
• Adding two check boxes to enable case-sensitive and exact match query
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Copyright Oracle Corporation, 2000. All rights reserved.
ValidationValidation
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1818--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following: • Explain the effects of the validation unit upon a
form• List Form Builder validation properties• Control validation by using triggers
After completing this lesson, you should be able to do the following: • Explain the effects of the validation unit upon a
form• List Form Builder validation properties• Control validation by using triggers
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1818--33 Copyright Oracle Corporation, 2000. All rights reserved.
ValidationValidation
• Form Builder validates at the following levels:• Form Builder validates at the following levels:
Form level
Block level
Record level Item level
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1818--44 Copyright Oracle Corporation, 2000. All rights reserved.
ValidationValidation
• Validation occurs when:– [Enter] key or ENTER Built-in is
obeyed– Operator or trigger leaves the validation unit
(includes a Commit)
• Validation occurs when:– [Enter] key or ENTER Built-in is
obeyed– Operator or trigger leaves the validation unit
(includes a Commit)
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1818--55 Copyright Oracle Corporation, 2000. All rights reserved.
Validation Unit PropertyValidation Unit Property
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1818--66 Copyright Oracle Corporation, 2000. All rights reserved.
LOV for ValidationLOV for Validation
LOVTERRY
Full listFull list
MARTPartial listPartial list
WARDValidValid
Auto Auto completecomplete
AL
ALAN
HDATE---------------
20-FEB-198122-FEB-198106-MAR-199606-FEB-1995
08-SEP-1981
ENAME---------------
MARTIN MARTINEZSEDATWARD
ALAN
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1818--77 Copyright Oracle Corporation, 2000. All rights reserved.
Validation TriggersValidation Triggers
IF :S_ORD.date_shipped < :S_ORD.date_ordered THEN
MESSAGE(’Ship Date is before Order Date!’);
RAISE form_trigger_failure;
END IF;
IF :S_ORD.date_shipped < :S_ORD.date_ordered THEN
MESSAGE(’Ship Date is before Order Date!’);
RAISE form_trigger_failure;
END IF;
• Item levelWhen-Validate-Item
• Block levelWhen-Validate-Record
• Item levelWhen-Validate-Item
• Block levelWhen-Validate-Record
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1818--88 Copyright Oracle Corporation, 2000. All rights reserved.
Validating User InputValidating User Input
Trigger failure?Trigger failure?
WW--VV--II
Customer IDCustomer ID
998
SELECT . . .
WHERE id = :S_ORD.customer_id
SELECT . . .
WHERE id = :S_ORD.customer_id
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1818--99 Copyright Oracle Corporation, 2000. All rights reserved.
Tracking Validation StatusTracking Validation Status
• NEW– When a record is created– Also for Copy Value from Item or Initial Value
• CHANGED– When changed by user or trigger– When any item in new record is changed
• NEW– When a record is created– Also for Copy Value from Item or Initial Value
• CHANGED– When changed by user or trigger– When any item in new record is changed
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1818--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Tracking Validation StatusTracking Validation Status
• VALID– When validation has been successful– After records are fetched from database– After a successful post or commit– Duplicated record inherits status of source
• VALID– When validation has been successful– After records are fetched from database– After a successful post or commit– Duplicated record inherits status of source
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1818--1111 Copyright Oracle Corporation, 2000. All rights reserved.
Built-ins for ValidationBuilt-ins for Validation
• CLEAR_BLOCK, CLEAR_ FORM, EXIT_FORM• ENTER• SET_FORM_PROPERTY
– (..., VALIDATION)– (..., VALIDATION_UNIT)
• ITEM_IS_VALID item property• VALIDATE (VALIDATION_ UNIT)
• CLEAR_BLOCK, CLEAR_ FORM, EXIT_FORM• ENTER• SET_FORM_PROPERTY
– (..., VALIDATION)– (..., VALIDATION_UNIT)
• ITEM_IS_VALID item property• VALIDATE (VALIDATION_ UNIT)
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1818--1212 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Validation occurs at item, record, block, and form levels.
• Validation happens when:– [Enter] Key or ENTER built-in is activated– Control leaves the validation unit due to
navigation or commit
• Validation occurs at item, record, block, and form levels.
• Validation happens when:– [Enter] Key or ENTER built-in is activated– Control leaves the validation unit due to
navigation or commit
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1818--1313 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Standard validation occurs before trigger validation.
• Default validation unit is item level.• Validation status
– NEW– CHANGED– VALID
• When-Validate-“object” triggers to supplement validation.
• Standard validation occurs before trigger validation.
• Default validation unit is item level.• Validation status
– NEW– CHANGED– VALID
• When-Validate-“object” triggers to supplement validation.
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1818--1414 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 18 OverviewPractice 18 Overview
This practice covers the following topics:• Validating the Sales Representative item value by
using an LOV• Writing a validation trigger to check that the
shipped date is not before the ordered date• Populating customer names, sales representative
names, and IDs when a customer ID is changed• Writing a validation trigger to populate the name
and the price of the product when the product ID is changed
This practice covers the following topics:• Validating the Sales Representative item value by
using an LOV• Writing a validation trigger to check that the
shipped date is not before the ordered date• Populating customer names, sales representative
names, and IDs when a customer ID is changed• Writing a validation trigger to populate the name
and the price of the product when the product ID is changed
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Copyright Oracle Corporation, 2000. All rights reserved.
NavigationNavigation
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1919--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following: • Distinguish between internal and external
navigation• Describe and use navigation triggers• Identify built-ins that cause navigation
After completing this lesson, you should be able to do the following: • Distinguish between internal and external
navigation• Describe and use navigation triggers• Identify built-ins that cause navigation
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1919--33 Copyright Oracle Corporation, 2000. All rights reserved.
About NavigationAbout Navigation
• What is the navigational unit?– Outside the form– Form– Block– Record– Item
• Entering and leaving objects• What happens if navigation fails?
• What is the navigational unit?– Outside the form– Form– Block– Record– Item
• Entering and leaving objects• What happens if navigation fails?
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1919--44 Copyright Oracle Corporation, 2000. All rights reserved.
Navigation PropertiesNavigation Properties
• Form module– Mouse navigation limit– First navigation data block
• Block– Navigation style– Previous navigation data block– Next navigation data block
• Form module– Mouse navigation limit– First navigation data block
• Block– Navigation style– Previous navigation data block– Next navigation data block
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1919--55 Copyright Oracle Corporation, 2000. All rights reserved.
Navigation PropertiesNavigation Properties
• Item– Enabled– Keyboard navigable– Mouse navigate – Previous navigation item– Next navigation item
• Item– Enabled– Keyboard navigable– Mouse navigate – Previous navigation item– Next navigation item
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1919--66 Copyright Oracle Corporation, 2000. All rights reserved.
v
^
Mouse Navigate Property = YesMouse Navigate Property = YesMouse Navigate Property = Yes
x
Exit item
Exit record
Exit block
Enter block
Enter record
Enter item
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1919--77 Copyright Oracle Corporation, 2000. All rights reserved.
v
^x
Internal NavigationInternal NavigationInternal Navigation
Next Record
Exit item
Exit record
Enter record
Enter item
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1919--88 Copyright Oracle Corporation, 2000. All rights reserved.
v
^x
Navigation TriggersNavigation Triggers
Pre- and Post-
When-New-“object”-Instance
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1919--99 Copyright Oracle Corporation, 2000. All rights reserved.
Navigation TriggersNavigation Triggers
When-New-“object”-Instance
Fire after navigation
Does fire when validation unit is higher than the trigger object
Allow restricted and unrestricted built-ins
Are not affected by failure
Pre- and Post-
Fire during navigation
Does not fire if validation unit is higher than trigger object
Allow unrestricted built-ins
Handle failure by returning to initial object
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1919--1010 Copyright Oracle Corporation, 2000. All rights reserved.
When-New-“object”-Instance TriggersWhen-New-“object”-Instance Triggers
• When-New-Form-Instance• When-New-Block-Instance• When-New-Record-Instance• When-New-Item-Instance
• When-New-Form-Instance• When-New-Block-Instance• When-New-Record-Instance• When-New-Item-Instance
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1919--1111 Copyright Oracle Corporation, 2000. All rights reserved.
SET_“object”_PROPERTY ExamplesSET_SET_“object”“object”_PROPERTY Examples_PROPERTY Examples
SET_FORM_PROPERTY(FIRST_NAVIGATION_BLOCK, ’S_ITEM’);SET_FORM_PROPERTY(FIRST_NAVIGATION_BLOCK, ’S_ITEM’);
SET_BLOCK_PROPERTY(’S_ORD’, ORDER_BY,
’CUSTOMER_ID’);
SET_BLOCK_PROPERTY(’S_ORD’, ORDER_BY,
’CUSTOMER_ID’);
SET_RECORD_PROPERTY(3, ’S_ITEM’, STATUS,
QUERY_STATUS);
SET_RECORD_PROPERTY(3, ’S_ITEM’, STATUS,
QUERY_STATUS);
SET_ITEM_PROPERTY(’CONTROL.stock_button’, ICON_NAME,
’stock’);
SET_ITEM_PROPERTY(’CONTROL.stock_button’, ICON_NAME,
’stock’);
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1919--1212 Copyright Oracle Corporation, 2000. All rights reserved.
The Pre- and Post-TriggersThe Pre- and Post-Triggers
• Pre/Post-Form • Pre/Post-Block • Pre/Post-Record• Pre/Post-Text-Item
• Pre/Post-Form • Pre/Post-Block • Pre/Post-Record• Pre/Post-Text-Item
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1919--1313 Copyright Oracle Corporation, 2000. All rights reserved.
Post-Block Trigger ExamplePost-Block Trigger Example
SET_ITEM_PROPERTY(’CONTROL.stock_button’, enabled,
property_false);
SET_ITEM_PROPERTY(’CONTROL.stock_button’, enabled,
property_false);
Disabling Stock_Button when leaving the S_ITEM block:Disabling Stock_Button when leaving the S_ITEM block:
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1919--1414 Copyright Oracle Corporation, 2000. All rights reserved.
v
^
The Navigation TrapThe Navigation Trap
A Post-Text-Item
Pre-Text-Item
Pre-Text-Item
B
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1919--1515 Copyright Oracle Corporation, 2000. All rights reserved.
• When-New-Item-Instance
• Pre-Text-Item
• When-New-Item-Instance
• Pre-Text-Item
IF CHECKBOX_CHECKED(’S_ORD.order_filled’)THEN
SET_ITEM_PROPERTY(’S_ORD.date_shipped’,
UPDATE_ALLOWED, property_false);
END IF;
IF CHECKBOX_CHECKED(’S_ORD.order_filled’)THEN
SET_ITEM_PROPERTY(’S_ORD.date_shipped’,
UPDATE_ALLOWED, property_false);
END IF;
Navigation in TriggersNavigation in Triggers
IF CHECKBOX_CHECKED(’S_ORD.order_filled’) THEN
SET_ITEM_PROPERTY(’S_ORD.date_shipped’,
UPDATE_ALLOWED, property_false);
END IF;
IF CHECKBOX_CHECKED(’S_ORD.order_filled’) THEN
SET_ITEM_PROPERTY(’S_ORD.date_shipped’,
UPDATE_ALLOWED, property_false);
END IF;
GO_ITEM(’S_ORD.date_shipped’);
GO_ITEM(’S_ORD.date_shipped’);
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1919--1616 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Controlling navigation through properties• Internal navigation• Navigation triggers
– When-New-“object”-Instance– Pre-– Post-
• Navigation trap• Navigation in triggers
• Controlling navigation through properties• Internal navigation• Navigation triggers
– When-New-“object”-Instance– Pre-– Post-
• Navigation trap• Navigation in triggers
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1919--1717 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 19 OverviewPractice 19 Overview
This practice covers the following topics:• Executing a query at form startup• Populating product images when cursor arrives on
each record of the S_ITEM block
This practice covers the following topics:• Executing a query at form startup• Populating product images when cursor arrives on
each record of the S_ITEM block
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Copyright Oracle Corporation, 2000. All rights reserved.
Transaction ProcessingTransaction Processing
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2020--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following: • Describe details of commit processing and commit
triggers • Supplement transaction processing by using
triggers• Allocate sequence numbers to records as they are
applied to tables• Implement array DML
After completing this lesson, you should be able to do the following: • Describe details of commit processing and commit
triggers • Supplement transaction processing by using
triggers• Allocate sequence numbers to records as they are
applied to tables• Implement array DML
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2020--33 Copyright Oracle Corporation, 2000. All rights reserved.
Transaction ProcessingTransaction Processing
SaveTransaction (Begin)Transaction (Begin)
FORM AAction Edit
Block#1
Block#2
New RecordUpdated Record
Deleted RecordUpdated Record
Commit work;Commit work;
INSERT INTO Table1INSERT INTO Table1
UPDATE Table1UPDATE Table1
DELETE FROM Table2DELETE FROM Table2
UPDATE Table2UPDATE Table2
Transaction (End)Transaction (End)
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2020--44 Copyright Oracle Corporation, 2000. All rights reserved.
Transaction ProcessingTransaction Processing
Transaction processing includes two phases:• Post:
– Writes record changes to base tables– Fires transactional triggers
• Commit: Performs database commitErrors result in:• Rollback of the database changes• Error message
Transaction processing includes two phases:• Post:
– Writes record changes to base tables– Fires transactional triggers
• Commit: Performs database commitErrors result in:• Rollback of the database changes• Error message
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2020--55 Copyright Oracle Corporation, 2000. All rights reserved.
1
The Commit Sequence of EventsThe Commit Sequence of EventsValidate the form
Validate the block
Pre-Commit
Pre-Delete
On-Delete Delete row
Post-Delete
2
More More records?records?
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2020--66 Copyright Oracle Corporation, 2000. All rights reserved.
The Commit Sequence of EventsThe Commit Sequence of Events
Check uniquenessCheck uniqueness
Pre-Insert
Copy value from item
Pre-Update
On-Insert Insert row
Post-Insert
On-Update Update row
Post-Update
MoreMoreblocks?blocks?
Post-Database-Commit
Post-Forms-Commit
1INSERT UPDATE
Stop
2
Commit changes
More More records?records?
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2020--77 Copyright Oracle Corporation, 2000. All rights reserved.
Characteristics of Commit Triggers
Characteristics of Commit Triggers
• Pre-Commit: Fires once if form changes are made or uncommitted changes are posted
• Pre- and Post-DML• On-DML: Fires per record, replacing default DML
on rowUse DELETE_RECORD, INSERT_RECORD, UPDATE_RECORD built-ins
• Pre-Commit: Fires once if form changes are made or uncommitted changes are posted
• Pre- and Post-DML• On-DML: Fires per record, replacing default DML
on rowUse DELETE_RECORD, INSERT_RECORD, UPDATE_RECORD built-ins
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2020--88 Copyright Oracle Corporation, 2000. All rights reserved.
Characteristics of Commit Triggers
Characteristics of Commit Triggers
• Post-Forms-Commit: Fires once even if no changes are made
• Post-Database-Commit: Fires once even if no changes are made
Note: A commit-trigger failure causes a rollback to the savepoint.
• Post-Forms-Commit: Fires once even if no changes are made
•• PostPost--DatabaseDatabase--Commit: Fires once even if no Commit: Fires once even if no changes are madechanges are made
Note: A commit-trigger failure causes a rollback to the savepoint.
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2020--99 Copyright Oracle Corporation, 2000. All rights reserved.
Commit Triggers UsesCommit Triggers Uses
Pre-Commit
Pre-Delete
Pre-Insert
Pre-Update
Check user authorization; set up special locking
Journaling; implement foreign-key delete rule
Generate sequence numbers; journaling; automatically generated columns; check constraints
Journaling; implement foreign-key update rule; auto-generated columns; check constraints
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2020--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Commit Triggers Uses Commit Triggers Uses
On-Insert/Update/Delete
Post-Forms-Commit
Post-Database-Commit
Replace default blockDML statements
Check complex multirow constraints
Test commit success;test uncommitted posts
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2020--1111 Copyright Oracle Corporation, 2000. All rights reserved.
ColumnColumnItemItemLife of an UpdateLife of an Update
QueryRollbackRollback
DataData20 20
LockedLockedQuery
30 20Update record in form
[Save] 30 20[Save]
Pre-Update 30 20Pre-Update
Row Updated 30 30 20Row updated
Post-Update 30 30 20Post-Update
Commit 30 30
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2020--1212 Copyright Oracle Corporation, 2000. All rights reserved.
Delete ValidationDelete Validation
DECLARE
CURSOR C1 IS
SELECT ’anything’ FROM S_ORD
WHERE customer_id = :S_CUSTOMER.id;
BEGIN
OPEN C1;
FETCH C1 INTO :GLOBAL.dummy;
IF C1%FOUND THEN
CLOSE C1;
MESSAGE(’There are orders for this customer!’);
RAISE form_trigger_failure;
ELSE
CLOSE C1;
END IF;
END;
DECLARE
CURSOR C1 IS
SELECT ’anything’ FROM S_ORD
WHERE customer_id = :S_CUSTOMER.id;
BEGIN
OPEN C1;
FETCH C1 INTO :GLOBAL.dummy;
IF C1%FOUND THEN
CLOSE C1;
MESSAGE(’There are orders for this customer!’);
RAISE form_trigger_failure;
ELSE
CLOSE C1;
END IF;
END;
• Pre-Delete trigger• Final checks before row deletion• Pre-Delete trigger• Final checks before row deletion
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2020--1313 Copyright Oracle Corporation, 2000. All rights reserved.
Assigning Sequence NumbersAssigning Sequence Numbers
PrePre--InsertInsertInsertInsert
601
602
602
DatabaseDatabase
601 Value Value
IDID
SequenceSequence
SELECT S_ORD_ID.nextval
INTO :S_ORD.id
FROM SYS.dual;
SELECT S_ORD_ID.nextval
INTO :S_ORD.id
FROM SYS.dual;
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2020--1414 Copyright Oracle Corporation, 2000. All rights reserved.
Keeping an Audit TrailKeeping an Audit Trail
:GLOBAL.insert_tot :=
TO_CHAR(TO_NUMBER(:GLOBAL.insert_tot)+1);
:GLOBAL.insert_tot :=
TO_CHAR(TO_NUMBER(:GLOBAL.insert_tot)+1);
• Write changes to nonbase tables.• Gather statistics on applied changes.
Post-Insert example:
• Write changes to nonbase tables.• Gather statistics on applied changes.
Post-Insert example:
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2020--1515 Copyright Oracle Corporation, 2000. All rights reserved.
Testing the Resultof Trigger DML
Testing the Resultof Trigger DML
• SQL%FOUND• SQL%NOTFOUND• SQL%ROWCOUNT
• SQL%FOUND• SQL%NOTFOUND• SQL%ROWCOUNT
UPDATE S_ORD
SET date_shipped = SYSDATE
WHERE id = :S_ORD.id;
IF SQL%NOTFOUND THEN
MESSAGE(’Record not found in database’);
RAISE form_trigger_failure;
END IF;
UPDATE S_ORD
SET date_shipped = SYSDATE
WHERE id = :S_ORD.id;
IF SQL%NOTFOUND THEN
MESSAGE(’Record not found in database’);
RAISE form_trigger_failure;
END IF;
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2020--1616 Copyright Oracle Corporation, 2000. All rights reserved.
DML Statements Issued During Commit Processing
DML Statements Issued During Commit Processing
INSERT INTO base_table (base_column, base_column,...)
VALUES (:base_item, :base_item, ...)
UPDATE base_table
SET base_column = :base_item, base_column =
:base_item, ...
WHERE ROWID = :ROWID
DELETE FROM base_table
WHERE ROWID = :ROWID
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2020--1717 Copyright Oracle Corporation, 2000. All rights reserved.
DML Statements Issued During Commit Processing
DML Statements Issued During Commit Processing
Rules:• DML statements may fire database triggers.• Form Builder uses and retrieves ROWID.• The Update Changed Columns Only and Enforce
Column Security properties affect UPDATE statements.
• Locking statements are not issued.
Rules:• DML statements may fire database triggers.• Form Builder uses and retrieves ROWID.• The Update Changed Columns Only and Enforce
Column Security properties affect UPDATE statements.
• Locking statements are not issued.
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2020--1818 Copyright Oracle Corporation, 2000. All rights reserved.
Overriding Default TransactionOverriding Default Transaction
Additional transactional triggers:Additional transactional triggers:
On-Check-Unique
On-Column-Security
On-Commit
On-Rollback
On-Savepoint
On-Sequence-Number
CHECK_RECORD_UNIQUENESS
ENFORCE_COLUMN_SECURITY
COMMIT_FORM
ISSUE_ROLLBACK
ISSUE_SAVEPOINT
GENERATE_SEQUENCE_NUMBER
Trigger Do-the-Right-Thing Built-in
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2020--1919 Copyright Oracle Corporation, 2000. All rights reserved.
Overriding Default TransactionOverriding Default Transaction
Transactional triggers for logging on and off:Transactional triggers for logging on and off:
Pre-Logon
Pre-Logout
On-Logon
On-Logout
Post-Logon
Post-Logout
-
-
LOGON
LOGOUT
-
-
Trigger Do-the-Right-Thing Built-in
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2020--2020 Copyright Oracle Corporation, 2000. All rights reserved.
Running with Data SourcesOther than Oracle
Running with Data SourcesOther than Oracle
• Three ways to run against data sources other than Oracle:– Oracle Open Gateways– Oracle Open Client Adapter for ODBC– Write appropriate transactional triggers
• Three ways to run against data sources other than Oracle:– Oracle Open Gateways– Oracle Open Client Adapter for ODBC– Write appropriate transactional triggers
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2020--2121 Copyright Oracle Corporation, 2000. All rights reserved.
Running with Data SourcesOther than Oracle
Running with Data SourcesOther than Oracle
• Connecting with Open Gateway:– Cursor and Savepoint mode form module
properties– Key mode and Locking mode block properties
• Using transactional triggers:– Call 3GL programs– Database data block property
• Connecting with Open Gateway:– Cursor and Savepoint mode form module
properties– Key mode and Locking mode block properties
• Using transactional triggers:– Call 3GL programs– Database data block property
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2020--2222 Copyright Oracle Corporation, 2000. All rights reserved.
Getting and Setting the Commit Status
Getting and Setting the Commit Status
• What is commit status?• SYSTEM.RECORD_STATUS:
– NEW– INSERT (also caused by control items)– QUERY– CHANGED
• What is commit status?• SYSTEM.RECORD_STATUS:
– NEW– INSERT (also caused by control items)– QUERY– CHANGED
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2020--2323 Copyright Oracle Corporation, 2000. All rights reserved.
Getting and Setting the Commit Status
Getting and Setting the Commit Status
• SYSTEM.BLOCK_STATUS:– NEW (may contain records with status
INSERT)– QUERY (also possible for control block)– CHANGED (block will be committed)
• SYSTEM.BLOCK_STATUS:– NEW (may contain records with status
INSERT)– QUERY (also possible for control block)– CHANGED (block will be committed)
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2020--2424 Copyright Oracle Corporation, 2000. All rights reserved.
Getting and Setting the Commit Status
Getting and Setting the Commit Status
• SYSTEM.FORM_STATUS:– NEW– QUERY– CHANGED
• SYSTEM.FORM_STATUS:– NEW– QUERY– CHANGED
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2020--2525 Copyright Oracle Corporation, 2000. All rights reserved.
Getting and Setting the Commit Status
Getting and Setting the Commit Status
• System variables versus built-ins for commit status
• Built-ins for getting and setting commit status:– GET_BLOCK_PROPERTY– GET_RECORD_PROPERTY– SET_ RECORD _PROPERTY
• System variables versus built-ins for commit status
• Built-ins for getting and setting commit status:– GET_BLOCK_PROPERTY– GET_RECORD_PROPERTY– SET_ RECORD _PROPERTY
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2020--2626 Copyright Oracle Corporation, 2000. All rights reserved.
Getting and Setting the Commit Status
Getting and Setting the Commit Status
• Example: If the third record of block S_ORD is a changed database record, set the status back to QUERY.
• Warnings:– Do not confuse commit status with validation
status.– The commit status is updated during
validation.
• Example: If the third record of block S_ORD is a changed database record, set the status back to QUERY.
• Warnings:– Do not confuse commit status with validation
status.– The commit status is updated during
validation.
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2020--2727 Copyright Oracle Corporation, 2000. All rights reserved.
Array DMLArray DML
• Performs array inserts, updates, and deletes• Vastly reduces network traffic• Performs array inserts, updates, and deletes• Vastly reduces network traffic
Fewer round trips Fewer round trips (exact number depends(exact number depends
on array size)on array size)2 inserts2 inserts
2 updates2 updates
1 delete1 deleteDatabaseDatabase
Empno Ename Job Hiredate
1234 Jones Clerk 01-Jan-19951235 Smith Clerk 01-Jan-1995
1236 Adams Clerk 01-Jan-19951237 Clark Clerk 01-Jan-1995
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2020--2828 Copyright Oracle Corporation, 2000. All rights reserved.
Effect of Array DML on Transactional Triggers
Effect of Array DML on Transactional Triggers
Array DML Size = 1Array DML Size = 1 Array DML Size > 1Array DML Size > 1
FiresFiresFires for each Fires for each insert, update,insert, update,deletedelete
Fires for each Fires for each insert, update, insert, update, deletedelete
RepeatedRepeatedfor eachfor eachinsert,insert,update,update,deletedelete
POSTPOST--
PREPRE--
DML
FiresFires
DML
POSTPOST--
PREPRE--
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2020--2929 Copyright Oracle Corporation, 2000. All rights reserved.
Implementing Array DMLImplementing Array DML
1. Enable the Array Processing option.2. Specify a DML Array Size of greater than 1.3. Specify block primary keys.
1. Enable the Array Processing option.2. Specify a DML Array Size of greater than 1.3. Specify block primary keys.
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2020--3030 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Post and commit phases• Flow of commit processing• DML statements issued during commit
processing• Characteristics and common uses of commit
triggers• Overriding default transaction processing• Getting and setting the commit status• Implementing Array DML
• Post and commit phases• Flow of commit processing• DML statements issued during commit
processing• Characteristics and common uses of commit
triggers• Overriding default transaction processing• Getting and setting the commit status• Implementing Array DML
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2020--3131 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 20 OverviewPractice 20 Overview
This practice covers the following topics:• Automatically populating order IDs by using a
sequence• Automatically populating item IDs by adding the
current highest order ID• Customizing the commit messages in the
CUSTOMERS form• Customizing the login screen in the CUSTOMERS
form
This practice covers the following topics:• Automatically populating order IDs by using a
sequence• Automatically populating item IDs by adding the
current highest order ID• Customizing the commit messages in the
CUSTOMERS form• Customizing the login screen in the CUSTOMERS
form
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Copyright Oracle Corporation, 2000. All rights reserved.
Writing Flexible CodeWriting Flexible Code
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2121--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following: • Describe flexible code• State the advantages of using system variables• Identify built-in subprograms that assist flexible
coding• Write code to reference objects by internal ID• Write code to reference objects indirectly
After completing this lesson, you should be able to do the following: • Describe flexible code• State the advantages of using system variables• Identify built-in subprograms that assist flexible
coding• Write code to reference objects by internal ID• Write code to reference objects indirectly
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2121--33 Copyright Oracle Corporation, 2000. All rights reserved.
Flexible CodeFlexible Code
• Is reusable code• Is generic code• Avoids hard-coded object names• Makes maintenance easier• Increases productivity
• Is reusable code• Is generic code• Avoids hard-coded object names• Makes maintenance easier• Increases productivity
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2121--44 Copyright Oracle Corporation, 2000. All rights reserved.
System Variables for Current ContextSystem Variables for Current Context
• Input focus:– SYSTEM.CURSOR_BLOCK– SYSTEM.CURSOR_RECORD– SYSTEM.CURSOR_ITEM– SYSTEM.CURSOR_VALUE
• Input focus:– SYSTEM.CURSOR_BLOCK– SYSTEM.CURSOR_RECORD– SYSTEM.CURSOR_ITEM– SYSTEM.CURSOR_VALUE
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2121--55 Copyright Oracle Corporation, 2000. All rights reserved.
System Variables for Current ContextSystem Variables for Current Context
• Trigger focus:– SYSTEM.TRIGGER_BLOCK– SYSTEM.TRIGGER_RECORD– SYSTEM.TRIGGER_ITEM
• Trigger focus:– SYSTEM.TRIGGER_BLOCK– SYSTEM.TRIGGER_RECORD– SYSTEM.TRIGGER_ITEM
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2121--66 Copyright Oracle Corporation, 2000. All rights reserved.
System Status VariablesSystem Status Variables
ENTER;
IF :SYSTEM.BLOCK_STATUS = ’CHANGED’ THEN
COMMIT_FORM;
END IF;
CLEAR_BLOCK;
ENTER;
IF :SYSTEM.BLOCK_STATUS = ’CHANGED’ THEN
COMMIT_FORM;
END IF;
CLEAR_BLOCK;
IF :SYSTEM.CURSOR_BLOCK = ’S_ORD’ THEN
GO_BLOCK(’S_ITEM’);
ELSIF :SYSTEM.CURSOR_BLOCK = ’S_ITEM’ THEN
GO_BLOCK(’S_INVENTORY’);
ELSIF :SYSTEM.CURSOR_BLOCK =’S_INVENTORY’ THEN
GO_BLOCK(’S_ORD’);
END IF;
IF :SYSTEM.CURSOR_BLOCK = ’S_ORD’ THEN
GO_BLOCK(’S_ITEM’);
ELSIF :SYSTEM.CURSOR_BLOCK = ’S_ITEM’ THEN
GO_BLOCK(’S_INVENTORY’);
ELSIF :SYSTEM.CURSOR_BLOCK =’S_INVENTORY’ THEN
GO_BLOCK(’S_ORD’);
END IF;
WhenWhen--ButtonButton--PressedPressed
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2121--77 Copyright Oracle Corporation, 2000. All rights reserved.
GET_object_PROPERTY Built-Ins
GET_object_PROPERTY Built-Ins
• GET_APPLICATION_PROPERTY• GET_FORM_PROPERTY• GET_BLOCK_PROPERTY• GET_RELATION_PROPERTY • GET_RECORD_PROPERTY• GET_ITEM_PROPERTY• GET_ITEM_INSTANCE_PROPERTY
• GET_APPLICATION_PROPERTY• GET_FORM_PROPERTY• GET_BLOCK_PROPERTY• GET_RELATION_PROPERTY • GET_RECORD_PROPERTY• GET_ITEM_PROPERTY• GET_ITEM_INSTANCE_PROPERTY
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2121--88 Copyright Oracle Corporation, 2000. All rights reserved.
GET_object_PROPERTY Built-Ins
GET_object_PROPERTY Built-Ins
• GET_LOV_PROPERTY• GET_RADIO_BUTTON_PROPERTY• GET_MENU_ITEM_PROPERTY• GET_CANVAS_PROPERTY • GET_TAB_PAGE_PROPERTY• GET_VIEW_PROPERTY• GET_WINDOW_PROPERTY
• GET_LOV_PROPERTY• GET_RADIO_BUTTON_PROPERTY• GET_MENU_ITEM_PROPERTY• GET_CANVAS_PROPERTY • GET_TAB_PAGE_PROPERTY• GET_VIEW_PROPERTY• GET_WINDOW_PROPERTY
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2121--99 Copyright Oracle Corporation, 2000. All rights reserved.
SET_object_PROPERTY Built-Ins
SET_object_PROPERTY Built-Ins
• SET_APPLICATION_PROPERTY• SET_FORM_PROPERTY• SET_BLOCK_PROPERTY• SET_RELATION_PROPERTY • SET_RECORD_PROPERTY• SET_ITEM_PROPERTY• SET_ITEM_INSTANCE_PROPERTY
• SET_APPLICATION_PROPERTY• SET_FORM_PROPERTY• SET_BLOCK_PROPERTY• SET_RELATION_PROPERTY • SET_RECORD_PROPERTY• SET_ITEM_PROPERTY• SET_ITEM_INSTANCE_PROPERTY
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2121--1010 Copyright Oracle Corporation, 2000. All rights reserved.
SET_object_PROPERTY Built-Ins
SET_object_PROPERTY Built-Ins
• SET_LOV_PROPERTY• SET_RADIO_BUTTON_PROPERTY• SET_MENU_ITEM_PROPERTY• SET_CANVAS_PROPERTY • SET_TAB_PAGE_PROPERTY• SET_VIEW_PROPERTY• SET_WINDOW_PROPERTY
• SET_LOV_PROPERTY• SET_RADIO_BUTTON_PROPERTY• SET_MENU_ITEM_PROPERTY• SET_CANVAS_PROPERTY • SET_TAB_PAGE_PROPERTY• SET_VIEW_PROPERTY• SET_WINDOW_PROPERTY
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2121--1111 Copyright Oracle Corporation, 2000. All rights reserved.
Object IDsObject IDs
ID
lov_id := FIND_LOV(’my_lov’)lov_id := FIND_LOV(’my_lov’)
...SHOW_LOV(lov_id)...SHOW_LOV(lov_id)
ID
...SHOW_LOV(’my_lov’)...SHOW_LOV(’my_lov’)
Finding the object ID:Finding the object ID:
Referencing an object by ID:Referencing an object by ID:
Referencing an object by name:Referencing an object by name:
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2121--1212 Copyright Oracle Corporation, 2000. All rights reserved.
FIND_ Built-InsFIND_ Built-Ins
• FIND_FORM • FIND_BLOCK • FIND_ITEM • FIND_RELATION • FIND_LOV
• FIND_FORM • FIND_BLOCK • FIND_ITEM • FIND_RELATION • FIND_LOV
ID
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2121--1313 Copyright Oracle Corporation, 2000. All rights reserved.
FIND_ Built-InsFIND_ Built-Ins
• FIND_WINDOW• FIND_VIEW • FIND_CANVAS• FIND_ALERT• FIND_EDITOR
• FIND_WINDOW• FIND_VIEW • FIND_CANVAS• FIND_ALERT• FIND_EDITOR
ID
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2121--1414 Copyright Oracle Corporation, 2000. All rights reserved.
Using Object IDsUsing Object IDs
• Declare a PL/SQL variable of the same data type.• Use the variable for any later reference to the
object.• Use the variable within the current PL/SQL block
only.
• Declare a PL/SQL variable of the same data type.• Use the variable for any later reference to the
object.• Use the variable within the current PL/SQL block
only.
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2121--1515 Copyright Oracle Corporation, 2000. All rights reserved.
Using Object IDsUsing Object IDs
Example:Example:
DECLARE
item_var item;
BEGIN
item_var := FIND_ITEM(:SYSTEM.CURSOR_ITEM);
SET_ITEM_PROPERTY(item_var,position,30,55);
SET_ITEM_PROPERTY(item_var,prompt_text,’Current’);
END;
DECLARE
item_var item;
BEGIN
item_var := FIND_ITEM(:SYSTEM.CURSOR_ITEM);
SET_ITEM_PROPERTY(item_var,position,30,55);
SET_ITEM_PROPERTY(item_var,prompt_text,’Current’);
END;
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2121--1616 Copyright Oracle Corporation, 2000. All rights reserved.
Using Object IDsUsing Object IDs
• A PL/SQL variable has limited scope.• An .id extension:
– Broadens the scope– Converts to a numeric format– Enables assignment to a global variable– Converts back to the object data type
• A PL/SQL variable has limited scope.• An .id extension:
– Broadens the scope– Converts to a numeric format– Enables assignment to a global variable– Converts back to the object data type
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2121--1717 Copyright Oracle Corporation, 2000. All rights reserved.
Referencing Objects IndirectlyReferencing Objects Indirectly
Direct referenceDirect reference
Indirect referenceIndirect reference
ITEM AITEM AKIDSPORT
ITEM BITEM BITEM A
ITEM AITEM AKidsport
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2121--1818 Copyright Oracle Corporation, 2000. All rights reserved.
Referencing Objects IndirectlyReferencing Objects Indirectly
The NAME_IN function:• Returns:
– The contents of variable– Character string
• Use conversion functions for NUMBER and DATE
The NAME_IN function:• Returns:
– The contents of variable– Character string
• Use conversion functions for NUMBER and DATE
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2121--1919 Copyright Oracle Corporation, 2000. All rights reserved.
Referencing Objects IndirectlyReferencing Objects Indirectly
The COPY procedure allows:• Direct copy
• Indirect copy
The COPY procedure allows:• Direct copy
• Indirect copy
COPY(’Kidsport’,’S_CUSTOMER.name’);COPY(’Kidsport’,’S_CUSTOMER.name’);
COPY(’Kidsport’,:GLOBAL.customer_name);COPY(’Kidsport’,:GLOBAL.customer_name);
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2121--2020 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Use system variables:– To avoid hard-coding object names– To return information about the current state
of the form• Use GET_object_PROPERTY built-ins to return
current property values for Form Builder objects.
• Use system variables:– To avoid hard-coding object names– To return information about the current state
of the form• Use GET_object_PROPERTY built-ins to return
current property values for Form Builder objects.
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2121--2121 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Use object IDs to improve performance.• Use indirect referencing to allow form module
variables to be referenced in library and menu modules.
• Use object IDs to improve performance.• Use indirect referencing to allow form module
variables to be referenced in library and menu modules.
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2121--2222 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 21 OverviewPractice 21 Overview
This practices covers the following topics:• Populating product images only when the image
item is displayed• Modifying the When-Button-Pressed trigger of the
Image_Button in order to use object IDs instead of object names
This practices covers the following topics:• Populating product images only when the image
item is displayed• Modifying the When-Button-Pressed trigger of the
Image_Button in order to use object IDs instead of object names
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Copyright Oracle Corporation, 2000. All rights reserved.
Sharing Objects and CodeSharing Objects and Code
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2222--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following: • Describe the various methods for reusing objects
and code• Inherit properties from property classes• Group related objects for reuse• Reuse objects from an object library• Reuse PL/SQL code
After completing this lesson, you should be able to do the following: • Describe the various methods for reusing objects
and code• Inherit properties from property classes• Group related objects for reuse• Reuse objects from an object library• Reuse PL/SQL code
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2222--33 Copyright Oracle Corporation, 2000. All rights reserved.
Sharing and Reusing CodeSharing and Reusing Code
• Increases productivity• Decreases maintenance• Increases modularity• Maintains standards
• Increases productivity• Decreases maintenance• Increases modularity• Maintains standards
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2222--44 Copyright Oracle Corporation, 2000. All rights reserved.
Property ClassesProperty Classes
LOV
properties
Block
properties
Canvas
properties
Relation
properties
Item
properties
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2222--55 Copyright Oracle Corporation, 2000. All rights reserved.
Property Class IconsProperty Class Icons
Add PropertyAdd Property Inherit PropertyInherit Property
Property ClassProperty ClassDelete PropertyDelete Property
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2222--66 Copyright Oracle Corporation, 2000. All rights reserved.
Property palette
Default property
Inherited and Variant PropertiesInherited and Variant Properties
Default propertyDefault property
Property palette
Default propertyDefault property
Changed propertyChangeChangeDefault property
Property class
Apply
Property palette
Inherited property
Inherited property
Property palette
Inherited property
Inherited property
Variant propertyChangeChange
Inherited propertyInheritInherit
Inherited property
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2222--77 Copyright Oracle Corporation, 2000. All rights reserved.
Inheriting PropertiesInheriting Properties
• Set the Subclass Information property.• Convert an inherited property to a variant
property.• Convert a variant property to an inherited
property.
• Set the Subclass Information property.• Convert an inherited property to a variant
property.• Convert a variant property to an inherited
property.
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2222--88 Copyright Oracle Corporation, 2000. All rights reserved.
Object GroupObject Group
• Is a logical container• Enables you to:
– Group related objects– Copy multiple objects in one operation
• Is a logical container• Enables you to:
– Group related objects– Copy multiple objects in one operation
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2222--99 Copyright Oracle Corporation, 2000. All rights reserved.
Using Object GroupsUsing Object Groups
• Blocks include:– Items– Item-level triggers– Block-level triggers– Relations
• Object groups cannot include other object groups• Deleting:
– An object group does not affect the objects– An object affects the object group
• Blocks include:– Items– Item-level triggers– Block-level triggers– Relations
• Object groups cannot include other object groups• Deleting:
– An object group does not affect the objects– An object affects the object group
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2222--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Copying ObjectsCopying Objects
Ability to Ability to make exactmake exactcopy of objectcopy of object
Company Name:
Company Code:
Balance:
Company Name:
Company Code:
Balance:
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2222--1111 Copyright Oracle Corporation, 2000. All rights reserved.
What Is Subclassing?What Is Subclassing?
Ability to Ability to make exactmake exactcopy of objectcopy of object
Ability to add Ability to add to objectto object
Company Name:
Company Code:
Balance:
Company Name:
Company Code:
Balance:
Address:
Code:
Company Name:
Company Code:
Balance:
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2222--1212 Copyright Oracle Corporation, 2000. All rights reserved.
SubclassingSubclassing
Ability to Ability to make exactmake exactcopy of objectcopy of object
Ability to add Ability to add to objectto object
AbilityAbilityto alterto alterpropertiesproperties
Company Name:
Company Code:
Balance:
Company Name:
Company Code:
Balance:
Address:
Code:
Company Name:
Company Code:
Balance:
Company Name:
Company Code:
Balance:
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2222--1313 Copyright Oracle Corporation, 2000. All rights reserved.
Inheriting ChangesInheriting Changes
Company Name:
Company Code:
Balance:
Company Name:
Company Code:
Balance:
Company Name:
Company Code:
Balance:
Company Name:
Company Code:
Balance:
Address:
Code:
Make changes to parentMake changes to parent
AbilityAbilityto inheritto inheritchangeschanges
AbilityAbilityto inheritto inheritchangeschanges
AbilityAbilityto inheritto inheritchangeschanges
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2222--1414 Copyright Oracle Corporation, 2000. All rights reserved.
An Object LibraryAn Object Library
• Is a convenient container of objects for reuse• Simplifies reuse in complex environments• Supports corporate, project, and personal
standards• Simplifies the sharing of reusable components
• Is a convenient container of objects for reuse• Simplifies reuse in complex environments• Supports corporate, project, and personal
standards• Simplifies the sharing of reusable components
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2222--1515 Copyright Oracle Corporation, 2000. All rights reserved.
Object LibrariesObject Libraries
• Appear in the Navigator if they are open• Are used with a simple tabbed interface• Are saved to .olb file or to
database
• Appear in the Navigator if they are open• Are used with a simple tabbed interface• Are saved to .olb file or to
database
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2222--1616 Copyright Oracle Corporation, 2000. All rights reserved.
Benefits of the Object LibraryBenefits of the Object Library
• Simplifies the sharing and reuse of objects• Provides control and enforcement of standards• Eliminates the need to maintain multiple
referenced forms
• Simplifies the sharing and reuse of objects• Provides control and enforcement of standards• Eliminates the need to maintain multiple
referenced forms
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2222--1717 Copyright Oracle Corporation, 2000. All rights reserved.
A SmartClassA SmartClass
• Is an object in an object library that is frequently used as a class
• Can be applied easily and rapidly to existing objects
• Can be defined in many object libraries
You can have many SmartClasses of a given object type.
• Is an object in an object library that is frequently used as a class
• Can be applied easily and rapidly to existing objects
• Can be defined in many object libraries
You can have many SmartClasses of a given object type.
Check indicates a SmartClass.Check indicates a SmartClass.Check indicates a SmartClass.
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2222--1818 Copyright Oracle Corporation, 2000. All rights reserved.
Working with SmartClassesWorking with SmartClasses
1. Select an object in theLayout Editor or Navigator.
2. From the pop-up menu,select SmartClasses.
3. Select a class from the list.
1. Select an object in theLayout Editor or Navigator.
2. From the pop-up menu,select SmartClasses.
3. Select a class from the list.
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2222--1919 Copyright Oracle Corporation, 2000. All rights reserved.
Reusing PL/SQLReusing PL/SQL
• Triggers:– Copy and paste text– Copy and paste within a module– Copy to or subclass from another module– Move to an object library
• PL/SQL program units:– Copy and paste text– Copy and paste within a module– Copy to or subclass in another module– Create a library module– Move to an object library
• Triggers:– Copy and paste text– Copy and paste within a module– Copy to or subclass from another module– Move to an object library
• PL/SQL program units:– Copy and paste text– Copy and paste within a module– Copy to or subclass in another module– Create a library module– Move to an object library
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2222--2020 Copyright Oracle Corporation, 2000. All rights reserved.
PL/SQL LibrariesPL/SQL Libraries
ApplicationsApplications
Form modulesForm modulesMenu modulesMenu modules
Report modulesReport modulesGraphic modulesGraphic modules
.pll.pll ororDatabaseDatabase
Procedures
Functions
Packages
LibraryLibrary
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2222--2121 Copyright Oracle Corporation, 2000. All rights reserved.
Writing Code for LibrariesWriting Code for Libraries
• A library is a separate module, holding procedures, functions, and packages.
• Direct references to bind variables are not allowed.• Use subprogram parameters for passing bind
variables.• Use functions, where appropriate,
to return values.
• A library is a separate module, holding procedures, functions, and packages.
• Direct references to bind variables are not allowed.• Use subprogram parameters for passing bind
variables.• Use functions, where appropriate,
to return values.
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2222--2222 Copyright Oracle Corporation, 2000. All rights reserved.
Creating Library Program UnitsCreating Library Program Units
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2222--2323 Copyright Oracle Corporation, 2000. All rights reserved.
Attach Library Dialog BoxAttach Library Dialog Box
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2222--2424 Copyright Oracle Corporation, 2000. All rights reserved.
Calls and SearchesCalls and Searches
procedure ( );
...function...
package.call ( );
procedure ( );
...function...
package.call ( );•Program Units
PROCA
PROCB
•Attached Libraries•Database
CallsCalls
SearchesSearches
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2222--2525 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Reasons to share objects and code:– Increased productivity– Increased modularity– Decreased maintenance– Maintaining standards
• Reasons to share objects and code:– Increased productivity– Increased modularity– Decreased maintenance– Maintaining standards
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2222--2626 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Methods of sharing objects and code:– Using property classes– Using object groups– Copying– Subclassing– Creating a library module– Using object libraries
• Methods of sharing objects and code:– Using property classes– Using object groups– Copying– Subclassing– Creating a library module– Using object libraries
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2222--2727 Copyright Oracle Corporation, 2000. All rights reserved.
Practice 22 OverviewPractice 22 Overview
This practice covers the following topics:• Creating an object group and using this object
group in a new form module• Using property classes• Creating an object library and using this object
library in a new form module• Setting and using SmartClasses
This practice covers the following topics:• Creating an object group and using this object
group in a new form module• Using property classes• Creating an object library and using this object
library in a new form module• Setting and using SmartClasses
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Copyright Oracle Corporation, 2000. All rights reserved.
Introducing Multiple Form ApplicationsIntroducing Multiple Form Applications
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Copyright Oracle Corporation, 2000. All rights reserved.2323--22
ObjectivesObjectives
After completing this lesson, you should be able to do the following: • Call one form from another form module• Define multiple form functionality
After completing this lesson, you should be able to do the following: • Call one form from another form module• Define multiple form functionality
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Copyright Oracle Corporation, 2000. All rights reserved.2323--33
Multiple Form ApplicationsMultiple Form Applications
• Behavior:– Flexible navigation between windows– Single or multiple database connections– Transactions may span forms, if required– Commits in order of opening forms, starting
with current form• Links:
– Data is exchanged by global variables or parameter lists
– Code is shared as required, through libraries and the database
• Behavior:– Flexible navigation between windows– Single or multiple database connections– Transactions may span forms, if required– Commits in order of opening forms, starting
with current form• Links:
– Data is exchanged by global variables or parameter lists
– Code is shared as required, through libraries and the database
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Copyright Oracle Corporation, 2000. All rights reserved.2323--44
Multiple Form SessionMultiple Form Session
Form A
Forms Forms RuntimeRuntime
Global variablesGlobal variables
Form BOpenOpen
Form C
OpenOpen
Form D
OpenOpen
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Copyright Oracle Corporation, 2000. All rights reserved.2323--55
OPEN_FORMOPEN_FORM
MDI
FORM A
MDI
FORM A
Modeless
FORM BOPEN_FORM
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Copyright Oracle Corporation, 2000. All rights reserved.2323--66
OPEN_FORM and the Summit ApplicationOPEN_FORM and the Summit Application
• Scenario:Run the CUSTOMERS and ORDERS forms in the same session, navigating freely between them. You can make changes in the same transaction across forms. All forms are visible together.
• Scenario:Run the CUSTOMERS and ORDERS forms in the same session, navigating freely between them. You can make changes in the same transaction across forms. All forms are visible together.
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Copyright Oracle Corporation, 2000. All rights reserved.2323--77
OPEN_FORM and the Summit ApplicationOPEN_FORM and the Summit Application
• Actions:1. Define windows and positions for each form.2. Plan global variables and their names.3. Implement triggers to:– Open other forms– Initialize globals from calling forms– Use globals in opened forms
• Actions:1. Define windows and positions for each form.2. Plan global variables and their names.3. Implement triggers to:– Open other forms– Initialize globals from calling forms– Use globals in opened forms
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Copyright Oracle Corporation, 2000. All rights reserved.2323--88
Linking by Global VariablesLinking by Global Variables
ORDERS
Customer_IDOrder
CUSTOMERS
Customer
ID
GLOBAL.CUSTOMERID
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Copyright Oracle Corporation, 2000. All rights reserved.2323--99
Opening Another FormOpening Another Form
Example:
Notes• Control passes immediately to the ORDERS
form—no statements after OPEN_FORM are processed.
• If the Activate_Mode argument is set to NO_ACTIVATE, you retain control in the current form.
• The transaction continues unless it was explicitly committed before.
Example:
Notes• Control passes immediately to the ORDERS
form—no statements after OPEN_FORM are processed.
• If the Activate_Mode argument is set to NO_ACTIVATE, you retain control in the current form.
• The transaction continues unless it was explicitly committed before.
:GLOBAL.customerid := :S_CUSTOMER.id;
OPEN_FORM(’ORDERS’);
:GLOBAL.customerid := :S_CUSTOMER.id;
OPEN_FORM(’ORDERS’);
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Copyright Oracle Corporation, 2000. All rights reserved.2323--1010
Restricted Query at StartupRestricted Query at Startup
Execute_Query;Execute_Query;
:S_ORD.customer_id := :GLOBAL.customerid;:S_ORD.customer_id := :GLOBAL.customerid;
WhenWhen--NewNew--FormForm--InstanceInstance
PrePre--QueryQuery
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Copyright Oracle Corporation, 2000. All rights reserved.2323--1111
Assigning Global Variables in the Opened Form
Assigning Global Variables in the Opened Form
• DEFAULT_VALUE ensures the existence of globals.
• You can use globals to communicate that the form is running.
• DEFAULT_VALUE ensures the existence of globals.
• You can use globals to communicate that the form is running.
DEFAULT_VALUE(’’, ’GLOBAL.customerid’);DEFAULT_VALUE(’’, ’GLOBAL.customerid’);
Pre-Form example:Pre-Form example:
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Copyright Oracle Corporation, 2000. All rights reserved.2323--1212
Conditional OpeningConditional Opening
Example:Example:
:GLOBAL.customerid := :S_CUSTOMER.id;
IF ID_NULL(FIND_FORM(’ORDERS’)) THEN
OPEN_FORM(’ORDERS’);
ELSE
GO_FORM(’ORDERS’);
END IF;
:GLOBAL.customerid := :S_CUSTOMER.id;
IF ID_NULL(FIND_FORM(’ORDERS’)) THEN
OPEN_FORM(’ORDERS’);
ELSE
GO_FORM(’ORDERS’);
END IF;
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Copyright Oracle Corporation, 2000. All rights reserved.2323--1313
Closing the SessionClosing the Session
“Will the last one out please turn off the lights”“Will the last one out please turn off the lights”
RuntimeForm A
Form B
Form C
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Copyright Oracle Corporation, 2000. All rights reserved.2323--1414
Closing a Form with EXIT_FORM
Closing a Form with EXIT_FORM
• The default functionality is the same as for the Exit key.
• The Commit_Mode argument defines action on uncommitted changes.
• The default functionality is the same as for the Exit key.
• The Commit_Mode argument defines action on uncommitted changes.
ENTER;
IF :SYSTEM.FORM_STATUS = ’CHANGED’ THEN
EXIT_FORM( DO_COMMIT );
ELSE
EXIT_FORM( NO_COMMIT );
END IF;
ENTER;
IF :SYSTEM.FORM_STATUS = ’CHANGED’ THEN
EXIT_FORM( DO_COMMIT );
ELSE
EXIT_FORM( NO_COMMIT );
END IF;
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Copyright Oracle Corporation, 2000. All rights reserved.2323--1515
Other Useful TriggersOther Useful Triggers
Maintain referential links between forms throughglobal variables:• In the parent form:
– When-Validate-Item– When-New-Record-Instance
• In opened forms: When-Create-Record
Maintain referential links between forms throughglobal variables:• In the parent form:
– When-Validate-Item– When-New-Record-Instance
• In opened forms: When-Create-Record
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Copyright Oracle Corporation, 2000. All rights reserved.2323--1616
SummarySummary
• The OPEN_FORM built-in provides multiple concurrent forms in a session.
• Forms communicate through global variables:– Load key values in the parent form– Use global values in opened forms for
When-New-Form-Instance and Pre-Query
• The OPEN_FORM built-in provides multiple concurrent forms in a session.
• Forms communicate through global variables:– Load key values in the parent form– Use global values in opened forms for
When-New-Form-Instance and Pre-Query
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Copyright Oracle Corporation, 2000. All rights reserved.2323--1717
Practice 23 OverviewPractice 23 Overview
This practice covers the following topics:• Linking ORDERS and CUSTOMERS forms by using
a global variable• Using built-ins to check whether the ORDERS form
is running• Using global variables to restrict a query in the
ORDERS form
This practice covers the following topics:• Linking ORDERS and CUSTOMERS forms by using
a global variable• Using built-ins to check whether the ORDERS form
is running• Using global variables to restrict a query in the
ORDERS form
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Copyright Oracle Corporation, 2000. All rights reserved.
Locking in Form BuilderLocking in Form Builder
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DD--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Identify the locking mechanisms in Form Builder• Write triggers to invoke or intercept the locking
process• Plan trigger code to minimize overheads
on locking
After completing this lesson, you should be able to do the following:• Identify the locking mechanisms in Form Builder• Write triggers to invoke or intercept the locking
process• Plan trigger code to minimize overheads
on locking
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DD--33 Copyright Oracle Corporation, 2000. All rights reserved.
LockingLocking
Table in (RX)
Row in (X)
Row in (X)
Insert, update, or delete
Insert, update, or delete
Query
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DD--44 Copyright Oracle Corporation, 2000. All rights reserved.
Default Locking in Form BuilderDefault Locking in Form Builder
Insert record
Update record
Delete record
SaveAction
No locks
RS on table
RS on table
RX on above
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DD--55 Copyright Oracle Corporation, 2000. All rights reserved.
Concurrent Updates and DeletesConcurrent Updates and Deletes
• When users compete for the same record, normal locking protection applies.
• Form Builder tells the operator if another user has already locked the record.
• When users compete for the same record, normal locking protection applies.
• Form Builder tells the operator if another user has already locked the record.
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DD--66 Copyright Oracle Corporation, 2000. All rights reserved.
User A: Step 1User A: Step 1
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DD--77 Copyright Oracle Corporation, 2000. All rights reserved.
User B: Step 2User B: Step 2
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DD--88 Copyright Oracle Corporation, 2000. All rights reserved.
User A: Step 3User A: Step 3
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DD--99 Copyright Oracle Corporation, 2000. All rights reserved.
User B: Step 4User B: Step 4
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DD--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Concurrent Updates and DeletesConcurrent Updates and Deletes
Achieved by:• SQL data manipulation language• SQL explicit locking statements• Built-in subprograms• DML statements
Achieved by:• SQL data manipulation language• SQL explicit locking statements• Built-in subprograms• DML statements
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DD--1111 Copyright Oracle Corporation, 2000. All rights reserved.
Locking with Built-insLocking with Built-ins
• ENTER_QUERY (FOR_UPDATE)• EXECUTE_QUERY (FOR_UPDATE)• ENTER_QUERY (FOR_UPDATE)• EXECUTE_QUERY (FOR_UPDATE)
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DD--1212 Copyright Oracle Corporation, 2000. All rights reserved.
On-Lock TriggerOn-Lock Trigger
ExampleIF USER = 'MANAGER' THEN
LOCK_RECORD;
ELSE
MESSAGE('You are not authorized to change recordshere');
RAISE form_trigger_failure;
END IF;
ExampleIF USER = 'MANAGER' THEN
LOCK_RECORD;
ELSE
MESSAGE('You are not authorized to change recordshere');
RAISE form_trigger_failure;
END IF;
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DD--1313 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Default locking – Locks rows during update and delete– Informs user of concurrent update and delete
• Locking in triggers – Use SQL and certain built-ins– On-Lock trigger: LOCK_RECORD built-in
available
• Default locking – Locks rows during update and delete– Informs user of concurrent update and delete
• Locking in triggers – Use SQL and certain built-ins– On-Lock trigger: LOCK_RECORD built-in
available
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Copyright Oracle Corporation, 2000. All rights reserved.
Oracle8 Object FeaturesOracle8 Object Features
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EE--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Describe the Oracle8 scalar datatypes• Describe object types and objects• Describe object tables, object columns, and object
views• Describe the INSTEAD-OF triggers• Describe object REFs• Identify the display of objects in the Object
Navigator
After completing this lesson, you should be able to do the following:• Describe the Oracle8 scalar datatypes• Describe object types and objects• Describe object tables, object columns, and object
views• Describe the INSTEAD-OF triggers• Describe object REFs• Identify the display of objects in the Object
Navigator
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EE--33 Copyright Oracle Corporation, 2000. All rights reserved.
Oracle8 Scalar DatatypesOracle8 Scalar Datatypes
• NCHAR• NVARCHAR2• FLOAT• NLS types
• NCHAR• NVARCHAR2• FLOAT• NLS types
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EE--44 Copyright Oracle Corporation, 2000. All rights reserved.
Object TypesObject Types
AttributesAttributes
po_nocustinfo
line_itemsamount
MethodsMethods
ShipShip
CancelCancel
HoldHold
Check Check statusstatus
ORDER
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EE--55 Copyright Oracle Corporation, 2000. All rights reserved.
Object TablesObject Tables
Object table based on object typeObject table based on object type
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EE--66 Copyright Oracle Corporation, 2000. All rights reserved.
Object ColumnsObject Columns
Object column based on object typeObject column based on object type
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EE--77 Copyright Oracle Corporation, 2000. All rights reserved.
Object ViewsObject Views
Object views based on object typesObject views based on object types
ObjectObjectviewviewObjectObject--oriented oriented
applicationapplicationRelationalRelational
tabletable
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EE--88 Copyright Oracle Corporation, 2000. All rights reserved.
INSTEAD-OF TriggersINSTEAD-OF Triggers
INSTEADINSTEAD--OF OF TriggerTrigger
Nonupdatable Nonupdatable viewview
DECLAREDECLARE
BEGINBEGIN
EXCEPTIONEXCEPTION
END;END;
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EE--99 Copyright Oracle Corporation, 2000. All rights reserved.
References to ObjectsReferences to Objects
OIDOID
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EE--1010 Copyright Oracle Corporation, 2000. All rights reserved.
Object Types in Object NavigatorObject Types in Object Navigator
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EE--1111 Copyright Oracle Corporation, 2000. All rights reserved.
Object Type Wizard Object Type Wizard
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EE--1212 Copyright Oracle Corporation, 2000. All rights reserved.
Object Tables in Object NavigatorObject Tables in Object Navigator
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EE--1313 Copyright Oracle Corporation, 2000. All rights reserved.
Object Columns in Object NavigatorObject Columns in Object Navigator
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EE--1414 Copyright Oracle Corporation, 2000. All rights reserved.
Object Views in Object NavigatorObject Views in Object Navigator
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EE--1515 Copyright Oracle Corporation, 2000. All rights reserved.
INSTEAD-OF Trigger Dialog BoxINSTEAD-OF Trigger Dialog Box
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EE--1616 Copyright Oracle Corporation, 2000. All rights reserved.
Object REFs in Object NavigatorObject REFs in Object Navigator
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EE--1717 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• Oracle8 introduced three scalar datatypes.• Objects and object types allow representation of
complex data.• Three kinds of objects are object tables, object
columns, and object views.
• Oracle8 introduced three scalar datatypes.• Objects and object types allow representation of
complex data.• Three kinds of objects are object tables, object
columns, and object views.
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EE--1818 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• INSTEAD-OF triggers allow DML on object views.• Object REFs store the object identifier of certain
types of objects.• The Object Navigator can display certain types of
objects.
• INSTEAD-OF triggers allow DML on object views.• Object REFs store the object identifier of certain
types of objects.• The Object Navigator can display certain types of
objects.
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Copyright Oracle Corporation, 2000. All rights reserved.
Using the Layout EditorUsing the Layout Editor
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FF--22 Copyright Oracle Corporation, 2000. All rights reserved.
ObjectivesObjectives
After completing this lesson, you should be able to do the following:• Control the position and size of objects in a layout• Add lines and geometric shapes• Define the colors and fonts used for text• Color the body and boundaries of objects• Import images onto the layout
After completing this lesson, you should be able to do the following:• Control the position and size of objects in a layout• Add lines and geometric shapes• Define the colors and fonts used for text• Color the body and boundaries of objects• Import images onto the layout
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Using the Layout EditorUsing the Layout Editor
Common features:• Moving and resizing objects and text• Defining colors and fonts• Importing and manipulating images and drawings• Creating geometric lines and shapes
Common features:• Moving and resizing objects and text• Defining colors and fonts• Importing and manipulating images and drawings• Creating geometric lines and shapes
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Using the Layout EditorUsing the Layout Editor
Layout types:• Canvases in Forms• Report layouts
Layout types:• Canvases in Forms• Report layouts
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Invoking the Layout EditorInvoking the Layout EditorInvoking the Layout Editor
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Layout Editor: ComponentsLayout Editor: ComponentsLayout Editor: Components1
6
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3
2
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Tool PaletteTool PaletteTool Palette
1234567
89
10111213
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Selecting ObjectsSelecting ObjectsSelecting Objects
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Manipulating ObjectsManipulating ObjectsManipulating Objects
Expand/contractExpand/contractin one directionin one direction
Expand/contractExpand/contractdiagonallydiagonally
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Moving, Aligning, and OverlappingMoving, Aligning, and OverlappingMoving, Aligning, and Overlapping
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Groups in the LayoutGroups in the Layout
• Groups allow several objects to be repeatedly treated as one.
• Groups can be colored, moved, or resized.• Tool-specific operations exist for groups.• Groups have a single set of selection handles.• Members can be added or removed.
• Groups allow several objects to be repeatedly treated as one.
• Groups can be colored, moved, or resized.• Tool-specific operations exist for groups.• Groups have a single set of selection handles.• Members can be added or removed.
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Format MenuFormat MenuFormat Menu
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Color and Pattern ToolsColor and Pattern ToolsColor and Pattern Tools
23
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1
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Importing ImagesImporting ImagesImporting Images
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FF--1515 Copyright Oracle Corporation, 2000. All rights reserved.
SummarySummary
• You can create objects by:– Choosing a palette tool– Clicking and dragging on a layout region
• There are color palette tools for fill area, lines, and text.
• View, Arrange, and Format menus are available for layout.
• Objects can be grouped for operations.• You can import images and drawings by using
File—>Import.
• You can create objects by:– Choosing a palette tool– Clicking and dragging on a layout region
• There are color palette tools for fill area, lines, and text.
• View, Arrange, and Format menus are available for layout.
• Objects can be grouped for operations.• You can import images and drawings by using
File—>Import.
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Copyright Oracle Corporation, 2000. All rights reserved.
Introduction to Query BuilderIntroduction to Query Builder
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GG--22 Copyright Oracle Corporation, 2000. All rights reserved.
Query Builder FeaturesQuery Builder Features
• Easy-to-use data access tool• Point-and-click graphical user interface• Distributed data access• Powerful query building
• Easy-to-use data access tool• Point-and-click graphical user interface• Distributed data access• Powerful query building
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Query Builder WindowQuery Builder Window
1
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Building a New QueryBuilding a New Query
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Datasource ComponentsDatasource Components
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Refining a QueryRefining a Query
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Sorting DataSorting Data
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Viewing and Saving QueriesViewing and Saving Queries
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Including Additional TablesIncluding Additional Tables
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Viewing CommentsViewing Comments
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Including Related TablesIncluding Related Tables
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Creating a User-Defined RelationshipCreating a User-Defined Relationship
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Unmatched RowsUnmatched Rows
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ConditionsConditions
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OperatorsOperators
Arithmetic• Perform calculations on numeric and date columns• Examples: +, -, x, /
Logical• Combine conditions• Examples: AND, OR, NOT
Comparison• Compare one expression with another• Examples: =, <>, <, IN, IS NULL,
BETWEEN ... AND
Arithmetic• Perform calculations on numeric and date columns• Examples: +, -, x, /
Logical• Combine conditions• Examples: AND, OR, NOT
Comparison• Compare one expression with another• Examples: =, <>, <, IN, IS NULL,
BETWEEN ... AND
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Multiple ConditionsMultiple Conditions
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Deactivating a ConditionDeactivating a Condition
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Defining Columns Using an ExpressionDefining Columns Using an Expression
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GG--1919 Copyright Oracle Corporation, 2000. All rights reserved.
Defining Columns Using a FunctionDefining Columns Using a Function