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Wimp_GetRectangle
Programmer's Reference Manuals
» Part 7 - The Desktop
» The Window Manager
» SWI Calls
» Wimp_GetRectangle
Wimp_GetRectangle
(SWI &400CA)
| Entry | |
|---|---|
| R1 | Pointer to block to return result |
| Exit | |
|---|---|
| R0 | 0 if no more rectangles |
| R1 | Block is updated with Rectangle Data |
Use
The purpose of this call is to return the details of the next rectangle of the work area to be drawn.
Notes
This call is used repeatedly immediately following a call of either Wimp_RedrawWindow or Wimp_UpdateWindow.
If this call follows an earlier Wimp_RedrawWindow, then the rectangles is also cleared to the background colour of the window. If, however, it follows a Wimp_UpdateWindow call, then the rectangle’s contents are preserved.