SDL_active.c
1
2
/*
SDL - Simple DirectMedia Layer
3
Copyright (C) 1997-2006 Sam Lantinga
4
5
This library is free software; you can redistribute it and/or
6
modify it under the terms of the GNU Lesser General Public
7
License as published by the Free Software Foundation; either
8
version 2.1 of the License, or (at your option) any later version.
9
10
11
12
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13
Lesser General Public License for more details.
15
16
17
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19
Sam Lantinga
20
slouken@libsdl.org
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
*/
/* Application focus/iconification handling code for SDL */
#include <stdio.h>
#include <string.h>
#include "SDL_events.h"
#include "SDL_events_c.h"
/* These are static for our active event handling code */
static Uint8 SDL_appstate = 0;
/* Public functions */
int SDL_AppActiveInit(void)
{
/* Start completely active */
SDL_appstate = (SDL_APPACTIVE|SDL_APPINPUTFOCUS|SDL_APPMOUSEFOCUS);
/* That's it! */
return(0);
}
44
45
46
void SDL_AppActiveQuit(void)
{
}
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
Uint8 SDL_GetAppState(void)
{
return(SDL_appstate);
}
/* This is global for SDL_eventloop.c */
int SDL_PrivateAppActive(Uint8 gain, Uint8 state)
{
int posted;
Uint8 new_state;
/* Modify the current state with the given mask */
if ( gain ) {
new_state = (SDL_appstate | state);
} else {
new_state = (SDL_appstate & ~state);
}
/* Drop events that don't change state */
if ( new_state == SDL_appstate ) {
return(0);
}
/* Update internal active state */
SDL_appstate = new_state;
/* Post the event, if desired */
posted = 0;
if ( SDL_ProcessEvents[SDL_ACTIVEEVENT] == SDL_ENABLE ) {
SDL_Event event;
memset(&event, 0, sizeof(event));
event.type = SDL_ACTIVEEVENT;
event.active.gain = gain;
event.active.state = state;
if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
posted = 1;
SDL_PushEvent(&event);
}
}
/* If we lost keyboard focus, post key-up events */
if ( (state & SDL_APPINPUTFOCUS) && !gain ) {
SDL_ResetKeyboard();
}
return(posted);
}