Transcript
15 March 2010 TCS Confidential
Oracle Form Builder
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Basic TermsForm Development using form wizard.Creating LOV and Record group.Input ItemsNon-Input itemsTriggersNavigationSharing Objects and codes
Overview
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Description
Purpose
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Form Builder Modules
Form ModulesThis constitutes the main body of a Form Builder application. It includes the objects that end users interact with, to modify database information.
Menu ModulesA menu module is comprised of menus and menu code.
PL/SQL Library Modules
PL/SQL Libraries – is a module which contains various procedures and functions which can be reused by any form module.Procedures and Function becomes global to all forms.Just by invoking it,we can use them
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Objects of a Form ModuleWindow
A window is, by itself, an empty frame. Windows have a title bar and handles for interaction, allowing end users to scroll, move, and resize the window.
CanvasCanvases are background objects on which you place
the interface objects and graphic elements that end users interact with when they use a Form Builder application.
BlocksBlocks are logical containers for Form Builder items,
and are the basic unit of information in a form module. Items
Items are interface objects that display information to end users and allow them to interact with the application.
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CANVAS
Form Builder provides four types of canvases, all of which can be displayed in the same window at runtime. •Content Canvas - A content canvas is the "base" view that occupies the entire content pane of the window in which it is displayed.• Stacked Canvas - A stacked canvas is displayed atop—or stacked on—the content canvas assigned to the current window.•Tab Canvas - A tab canvas—made up of one or more tab pages—allows you to group and display a large amount of related information on a single dynamic Form Builder canvas object.•Toolbar Canvas - A toolbar canvas often is used to create toolbars for individual windows.
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Windows and CanvasesMDI MDI MDI parentparentparentwindowwindowwindow
DocumentDocumentDocumentwindowwindowwindow
CanvasCanvasCanvas
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Stacked Canvas Properties
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Tab Canvas Related Properties
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Property Pallette
ToolbarToolbar
Expand/Expand/CollapseCollapse
PropertyPropertynamename
Find fieldFind field
SearchSearchBackwardBackwardSearchSearchForwardForwardPropertyPropertyvaluevalue
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BLOCKS
Data BlocksA data block is associated with – or bound to – a database table or view, or a set of stored procedures.
Control BlocksA control block has no association with a database table or view; its objects do not relate to database columns.
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Input Items
• 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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Check Boxes
• Two-state interface object:– Checked– Unchecked– Checkbox mapping with other values– Column name mentioned in the property pallete– Database item set to yes.
• Block level property table name is mentioned.• Not limited to two values
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List Styles (Elements In List)
• List Items
TlistTlistGood
Poor
Excellent
Excellent PoplistPoplist
Excellent Combo BoxCombo Box
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Radio 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 boxEx:Radio group : initial value = cashRadio button value-1 = cashRadio button value-2= creditALERT:ALERT STYLE: STOP , CAUTION , NOTE
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Noninput
Items
• Item types that do not accept direct user input• include:• Display items• Image items• Sound items• Buttons
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Display 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
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Image Items
• Interface control• Use to display bitmapped images:
– From file system—supported file type– From database—LONG RAW column or a BLOB
column– Read_image_file– Write_image_file
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Image File Format
Image itemImage item
Write
CALS
GIF
CALS
GIF
BMPPICT
TPIC
TIFF
JFIF
RAS
JPG
Read
CALS
GIF
BMPTIFF
JFIF
JPEG
PICTTPIC
RAS
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Image Manipulation Palette
ZoomZoomPanPan
RotateRotate
SelectSelect
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Buttons
• 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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Trigger Scope Component
• Levels• Form• Block• Item
TypeScope
Code
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Trigger Type Component
• Pre-• Post-• When-• On-• Key-
TypeScope
Code
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Creating a Trigger
Smart Triggers
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PL/SQL Editor
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Navigation
• Navigation – Moving from one object to another is called as navigation or Entering or leaving an item is called as navigation.
Navigation TriggersPre_form Post_ItemPre_block Post_RecordPre_Record Post_BlockPre_Item Post_Form
Pre and Post navigational triggers fires during navigation.When the form enter an item or just after exiting from the
item.
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Some Built in Navigations
• go_form• go_block• Next_record• Previous_record• Next_block• Previous_block• Next_item• Previous_item• Up• Down• Scroll_up• Scroll_down
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Transactional Triggers
• Pre_delete• On_delete• Post_delete• Pre_insert• On_insert• Post_insert• Pre_update• On_update• Post_update• Post_form_commit• Post_database_commit• On-Suppresses the current processing and deletes a record according to a coding written inside the trigger.
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Sharing Objects and Codes
• There are four types of sharing objects• Property Classes• Object Groups• Object Libraries• PL/SQL Libraries
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Property Classes: Definition
Property Classes – These are form objects which contains a set ofproperty along with some.
1.Font name2.Font Size3.Foreground color4.Background colorItem->property palette->subclass information->dialog window comes->click on property class->specify your block name and property class name which you have created.
Note:Properties are of two types:1.Inherited( red arrow)2.Variant Changed (arrow cross).
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Object Groups• Object Groups are logical containers which contains different• logically related forms objects.• We can drag the objects such as blocks,canvases,LOV,• procedures,windows etc. and place them inside the object • groups.• We can drag the object group from 1st form and attach it to • the object group node of the second form created.• COPY – If we click on copy then there will be no relation • between the master and the child block.• SUBCLASS – If we click on subclass then any deletion from• the master block will affect the child block.
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PL/Sql
Libraries
• PL/SQL Libraries – is a module which contains various procedures and functions which can be reused by any form module.Procedures and Function becomes global to all forms.Just by invoking it,we can use them.
• We can attach our PL/sql library to the form.
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Object Libraries
Object Libraries – is a module which contains various forms objects and can be reused again and again.The lowest unit of object libraries is item.
1st form Object library->items->edit->Smart class->green arrow
comes.Save it in .olb format.
2nd formClick on necessary item->right click->smart class->select
whichever item you want from object library->red symbol comes.
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Difference between visual attribute and property class.
• Named visual attributes differ only font, color & pattern attributes, property clauses can contain this and any other properties. We can change the appearance of objects at run time by changing the named visual attributes programmatically , property clause assignments cannot be changed programmatically. When an object is inheriting from both a property clause and named visual attribute, the named visual attribute settings take precedence, and any visual attribute properties in the class are ignored.
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