This document discusses controlling windows and canvases programmatically in ABAP. It describes using triggers and system variables to interact with windows, manipulating multiple windows and views, and navigating tab style canvases. It provides examples of window and canvas built-ins for tasks like finding, getting and setting properties of windows and canvases, hiding, showing, moving and resizing windows, and working with tab pages.

1. Controlling Windows and Canvases
Programmatically

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. 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. 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. Window Built-ins
• FIND_WINDOW
• GET_WINDOW_PROPERTY
• SET_WINDOW_PROPERTY
• HIDE_WINDOW
• SHOW_WINDOW
• MOVE_WINDOW
• RESIZE_WINDOW

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. 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. Working with Tab Style Canvas
Tab canvas system variables:
• :SYSTEM.TAB_NEW_PAGE
• :SYSTEM.TAB_PREVIOUS_PAGE

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. 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. Windows and Blocks
Window2
Block3
Active Window
Nonactive
Window
Cursor
Location
Window1
Block2
Block1

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. 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