Oracle 10g Forms Lesson 10
- 2. Objectives 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 button Create a calculated item Create a hierarchical tree item Create a bean area item
- 3. Noninput Items Overview Item types that do not accept direct user input include: Display items Image items Buttons Calculated items Hierarchical tree items Bean area items
- 4. Display Items Display items: Are similar to text items. Cannot: Be edited Be queried Be navigated to Accept user input Can display: Nonbase table information Derived values
- 5. Creating a Display Item
- 6. Image Items Use image items to display images: From file system—supported file type From database—LONG RAW column or a BLOB column
- 8. Image File Formats Image item Image files Image files Read Write PICT TPIC CALS TIFF GIF JFIF BMP RAS CALS GIF BMP RAS JPEG TIFF JFIF JPEG PICT TPIC
- 9. Creating an Image Item
- 10. Setting Image-Specific Item Properties Image Format Image Depth Compression Quality Display Quality Sizing Style Show Horizontal Scroll Bar Show Vertical Scroll Bar
- 12. Push Buttons Push buttons: Cannot display or represent data Are used to initiate an action Display as: Text button Iconic
- 13. Push Button Actions Use buttons to: Move input focus Display an LOV Invoke an editor Invoke another window Commit data Issue a query Perform calculations
- 14. Creating a Push Button
- 15. Setting Push Button Properties Label Iconic Icon Filename Default Button Mouse Navigate Tooltip Tooltip Visual Attribute Group
- 16. Calculated Items What are calculated items? They accept item values that are based on calculations. They are read-only. They can be expressed as: Formula Summary
- 17. Creating a Calculated Item by Setting Properties 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.
- 18. Setting Item Properties for the Calculated Item Formula Calculation Mode Formula Summary Calculation Mode Summary Function Summarized Block Summarized Item
- 19. Summary Functions AVG COUNT MAX MIN STDDEV SUM VARIANCE
- 20. Calculated Item Based on a Formula ORDERS Item# Prod Id Unit Price Quantity Item Total 1 2 4 3 200 120 50 25 5 4 9 3 1,000 480 450 75 NVL((:order_items.unit_price * :order_items.quantity),0) Formula item Orders Items Description
- 21. Rules for Calculated Item Formulas Create calculated item formulas according to the following rules: 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.
- 22. Calculated Item Based on a Summary ORDERS 1 2 4 3 200 120 50 25 5 4 9 3 1,000 480 450 75 2,005 Order Total Summarized item Summary item Item# Prod Id Unit Price Quantity Item Total Description Orders Items
- 23. Rules 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
- 24. Creating a Hierarchical Tree Item
- 25. Setting Hierarchical Tree Item Properties Allow empty branches Multi selection Show lines Show symbols Record group Data query
- 26. Bean Area Items The Bean Area item enables you to: Add a JavaBean to a form Extend Forms functionality Interact with client machine Reduce network traffic
- 27. Creating a Bean Area Item Create bean area in Layout Editor Convert existing item to bean area
- 28. Setting Bean Area Item Properties
- 29. The JavaBean at Run Time
- 30. Summary In this lesson, you should have learned that: The following item types do not allow input: Display items Image items Push buttons Calculated items Hierarchical tree items Bean area items You create noninput items by: Changing the type of an existing item and setting certain properties Using the appropriate tool in the Layout Editor
- 31. Summary You can use: A display item to show nonbase table information An image item to display an image A push button to initiate action A calculated item to display the results of a formula or a summary function of another item A hierarchical tree item to display related data in a hierarchical fashion A bean area item to execute client-side Java code
- 32. Practice 10 Overview This practice covers the following topics: Creating display items Creating an image item Creating iconic buttons Creating calculated items: Formula Summary Creating a bean area item