Documentation: Wimp_ForceRedraw (mark invalid area syntax)
Programmer’s Reference Manuals
» Part 7 – The Desktop
» The Window Manager
» SWI Calls
» Wimp_ForceRedraw
» Wimp_ForceRedraw (mark invalid area syntax)
Wimp_ForceRedraw (mark invalid area syntax)
(SWI &400D1)
| Entry | |
|---|---|
| R0 | Window handle, or |
| -1 for absolute screen co-ordinates | |
| -2 for icon bar | |
| R1 | Minimum x of area |
| R2 | Minimum y of area |
| R3 | Maximum x of area |
| R4 | Maximum y of area |
| Exit | |
|---|---|
| R0 | Corrupt |
Use
This syntax form marks an area of a screen as invalid, so it can be redrawn later.
Notes
Co-ordinates are relative to the window’s work area, unless R0 = -1 on entry, in which case absolute screen co-ordinates should be provided.
This call should not be used for animation, or other temporary changes. Under these circumstances Wimp_UpdateWindow should be used instead.
Under the nested wimp, windows belonging to other applications can be marked as invalid.
