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Oracle Forms :Window and Canvases

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Oracle Forms :Window and Canvases

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Oracle Forms :Window and Canvases

  1. 1. Controlling Windows and Canvases Programmatically
  2. 2. Objectives • Display a form document in multiple windows • Write code to interact with windows • Manipulate windows programmatically • Window and Canvas Built-ins • Manipulate canvas views programmatically • Display large data blocks in a window
  3. 3. Window Interaction Triggers Trigger When-Window-Activated When-Window-Deactivated When-Window-Closed When-Window-Resized Use Enforces navigation Deactivates a window Closes a window Maintains visual standards
  4. 4. Example System Variable :SYSTEM.EVENT_WINDOW IF :SYSTEM.EVENT_WINDOW=‘EMP_WIN’ THEN GO_BLOCK(‘DEPT’); SET_WINDOW_PROPERTY(‘EMP_WIN’,VISIBLE, PROPERTY_FALSE); ELSE EXIT_FORM; END IF;
  5. 5. Window Built-ins • FIND_WINDOW • GET_WINDOW_PROPERTY • SET_WINDOW_PROPERTY • HIDE_WINDOW • SHOW_WINDOW • MOVE_WINDOW • RESIZE_WINDOW
  6. 6. Canvas Built-ins • FIND_CANVAS • GET_CANVAS_PROPERTY • SET_CANVAS_PROPERTY • FIND_VIEW • GET_VIEW_PROPERTY • SET_VIEW_PROPERTY • HIDE_VIEW • SHOW_VIEW • REPLACE_CONTENT_VIEW • SCROLL_VIEW
  7. 7. Working with Tab Style Canvas Page 1 Page 3Page 2click • Uses either function key • Next tab Page • Previous Tab page The When-Tab-Page-Changed trigger fires when a user: • Clicks a tab Previous Tab Page Next Tab Page
  8. 8. Working with Tab Style Canvas Tab canvas system variables: • :SYSTEM.TAB_NEW_PAGE • :SYSTEM.TAB_PREVIOUS_PAGE
  9. 9. Built-ins for Manipulating Tab Canvas • FIND_TAB_PAGE: Returns the tab page ID • GET_TAB_PAGE_PROPERTY: Returns the tab page label or the tab page canvas • SET_TAB_PAGE_PROPERTY: Enables changing of the tab page label
  10. 10. Example • Identify the topmost tab page • Bring a tab page to the top programmatically IF GET_CANVAS_PROPERTY(‘Dept_cv', TOPMOST_TAB_PAGE)= ‘Emp_page' THEN SET_CANVAS_PROPERTY(‘Dept_cv', TOPMOST_TAB_PAGE, ‘Dept_page'); END IF;
  11. 11. Windows and Blocks Window2 Block3 Active Window Nonactive Window Cursor Location Window1 Block2 Block1
  12. 12. Manipulating Windows Programmatically • Maximizing MDI Window SET_WINDOW_PROPERTY (forms_mdi_window, window_state, maximize); • Setting Title for the Window SET_WINDOW_PROPERTY (‘DEPT_WIN’, Title, ‘Department Application’); • Location the Cursor window GET_VIEW_PROPERTY (GET_ITEM_PROPERTY(NAME_IN (‘system.cursor_item’), item_canvas), window_name);
  13. 13. Summary • Controlling windows with system variable SYSTEM.EVENT_WINDOW • Window Interaction triggers • Working with Tab Style Canvas – SYSTEM.TAB_NEW_PAGE – SYSTEM.TAB_PREVIOUS_PAGE • Different Window and Canvas Built-ins

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