Wimp_GetRectangle (changes)
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WindowManager
» 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 used, repeatedly repeatedly, immediately following a call of eitherWimp_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.
See also
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