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annotate docs/man3/SDL_SetEventFilter.3 @ 128:8f7b9d6be8cc
Avoid a compiler warning when configured with --disable-threads
| author | Sam Lantinga <slouken@libsdl.org> |
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| date | Tue, 31 Jul 2001 00:32:27 +0000 |
| parents | 55f1f1b3e27d |
| children | e5bc29de3f0a |
| rev | line source |
|---|---|
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55
55f1f1b3e27d
Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
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1 .TH "SDL_SetEventFilter" "3" "Sun 10 Jun 2001, 19:40" "SDL" "SDL API Reference" |
| 0 | 2 .SH "NAME" |
| 3 SDL_SetEventFilter\- Sets up a filter to process all events before they are posted to the event queue\&. | |
| 4 .SH "SYNOPSIS" | |
| 5 .PP | |
| 6 \fB#include "SDL\&.h" | |
| 7 .sp | |
| 8 \fBvoid \fBSDL_SetEventFilter\fP\fR(\fBSDL_EventFilter filter\fR); | |
| 9 .SH "DESCRIPTION" | |
| 10 .PP | |
| 11 This function sets up a filter to process all events before they are posted to the event queue\&. This is a very powerful and flexible feature\&. The filter is prototyped as: | |
| 12 .PP | |
| 13 .nf | |
| 14 \f(CWtypedef int (*SDL_EventFilter)(const SDL_Event *event);\fR | |
| 15 .fi | |
| 16 .PP | |
| 17 If the filter returns \fB1\fR, then the event will be added to the internal queue\&. If it returns \fB0\fR, then the event will be dropped from the queue\&. This allows selective filtering of dynamically\&. | |
| 18 .PP | |
| 19 There is one caveat when dealing with the \fBSDL_QUITEVENT\fP event type\&. The event filter is only called when the window manager desires to close the application window\&. If the event filter returns 1, then the window will be closed, otherwise the window will remain open if possible\&. If the quit event is generated by an interrupt signal, it will bypass the internal queue and be delivered to the application at the next event poll\&. | |
| 20 .PP | |
| 21 .RS | |
| 22 \fBNote: | |
| 23 .PP | |
| 24 Events pushed onto the queue with \fI\fBSDL_PushEvent\fP\fR or \fI\fBSDL_PeepEvents\fP\fR do not get passed through the event filter\&. | |
| 25 .RE | |
| 26 .PP | |
| 27 .RS | |
| 28 \fBNote: | |
| 29 .PP | |
| 30 \fIBe Careful!\fP The event filter function may run in a different thread so be careful what you do within it\&. | |
| 31 .RE | |
| 32 .SH "SEE ALSO" | |
| 33 .PP | |
| 34 \fI\fBSDL_Event\fR\fR, \fI\fBSDL_GetEventFilter\fP\fR, \fI\fBSDL_PushEvent\fP\fR | |
|
55
55f1f1b3e27d
Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
35 ...\" created by instant / docbook-to-man, Sun 10 Jun 2001, 19:40 |