Wimp_RedrawWindow (changes)
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WindowManager
» SWI Calls
» Wimp_RedrawWindow
Wimp_RedrawWindow
(SWI &400C8)
| Entry | |
|---|---|
| R1 | Pointer to block to containing window handle |
| Exit | |
|---|---|
| - | Exits through Wimp_GetRectangle |
Use
The purpose of this call is to redraw parts of a window that needs updating.
Notes
This call is normally used after receiving a Redraw_Window_Request via Wimp_Poll.
This call must be the first Wimp operation after receiving a Redraw_Window_Request. This mans means you cannot, for example, create or delete other windows until after the redraw is complete.
Windows in need of updating are divided into discrete rectangular areas, and thus many rectangles may need redrawing. To ensure all necessary rectangle are updated, this call is used as part of a loop with Wimp_GetRectangle.
See also
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