Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_SetTimer.3 @ 3896:1a327643e741 SDL-1.2
X11 backend: tell app that mouse focus has been obtained when grabbing the
input. This allows us to enable DGA mode, even when the system cursor was
outside of the window when the grab was initiated.
Fixes Bugzilla #299, which has a more detailed explanation of the issue.
author | Ryan C. Gordon <icculus@icculus.org> |
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date | Mon, 13 Nov 2006 03:58:22 +0000 |
parents | e5bc29de3f0a |
children | 546f7c1eb755 |
rev | line source |
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Sam Lantinga <slouken@libsdl.org>
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1 .TH "SDL_SetTimer" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" |
0 | 2 .SH "NAME" |
3 SDL_SetTimer\- Set a callback to run after the specified number of milliseconds has elapsed\&. | |
4 .SH "SYNOPSIS" | |
5 .PP | |
6 \fB#include "SDL\&.h" | |
7 .sp | |
8 \fBint \fBSDL_SetTimer\fP\fR(\fBUint32 interval, SDL_TimerCallback callback\fR); | |
9 .SH "CALLBACK" | |
10 .PP | |
11 /* Function prototype for the timer callback function */ typedef Uint32 (*SDL_TimerCallback)(Uint32 interval); | |
12 .SH "DESCRIPTION" | |
13 .PP | |
14 Set a callback to run after the specified number of milliseconds has elapsed\&. The callback function is passed the current timer interval and returns the next timer interval\&. If the returned value is the same as the one passed in, the periodic alarm continues, otherwise a new alarm is scheduled\&. | |
15 .PP | |
16 To cancel a currently running timer, call \fBSDL_SetTimer(0, NULL);\fP | |
17 .PP | |
18 The timer callback function may run in a different thread than your main constant, and so shouldn\&'t call any functions from within itself\&. | |
19 .PP | |
20 The maximum resolution of this timer is 10 ms, which means that if you request a 16 ms timer, your callback will run approximately 20 ms later on an unloaded system\&. If you wanted to set a flag signaling a frame update at 30 frames per second (every 33 ms), you might set a timer for 30 ms (see example below)\&. | |
21 .PP | |
22 If you use this function, you need to pass \fBSDL_INIT_TIMER\fP to \fBSDL_Init()\fP\&. | |
23 .PP | |
24 .RS | |
25 \fBNote: | |
26 .PP | |
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Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
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27 This function is kept for compatibility but has been superseded by the new timer functions \fISDL_AddTimer\fR and \fISDL_RemoveTimer\fR which support multiple timers\&. |
0 | 28 .RE |
29 .SH "EXAMPLES" | |
30 .PP | |
31 .PP | |
32 .nf | |
33 \f(CWSDL_SetTimer((33/10)*10, my_callback);\fR | |
34 .fi | |
35 .PP | |
36 .SH "SEE ALSO" | |
37 .PP | |
38 \fI\fBSDL_AddTimer\fP\fR | |
181
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Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
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39 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01 |