1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2012 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 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22 #include "SDL_config.h"
23
24 /* Application focus/iconification handling code for SDL */
25
26 #include "SDL_events.h"
27 #include "SDL_events_c.h"
28
29
30 /* These are static for our active event handling code */
31 static Uint8 SDL_appstate = 0;
32
33 /* Public functions */
SDL_AppActiveInit(void)34 int SDL_AppActiveInit(void)
35 {
36 /* Start completely active */
37 SDL_appstate = (SDL_APPACTIVE|SDL_APPINPUTFOCUS|SDL_APPMOUSEFOCUS);
38
39 /* That's it! */
40 return(0);
41 }
SDL_AppActiveQuit(void)42 void SDL_AppActiveQuit(void)
43 {
44 }
45
SDL_GetAppState(void)46 Uint8 SDL_GetAppState(void)
47 {
48 return(SDL_appstate);
49 }
50
51 /* This is global for SDL_eventloop.c */
SDL_PrivateAppActive(Uint8 gain,Uint8 state)52 int SDL_PrivateAppActive(Uint8 gain, Uint8 state)
53 {
54 int posted;
55 Uint8 new_state;
56
57 /* Modify the current state with the given mask */
58 if ( gain ) {
59 new_state = (SDL_appstate | state);
60 } else {
61 new_state = (SDL_appstate & ~state);
62 }
63
64 /* Drop events that don't change state */
65 if ( new_state == SDL_appstate ) {
66 return(0);
67 }
68
69 /* Update internal active state */
70 SDL_appstate = new_state;
71
72 /* Post the event, if desired */
73 posted = 0;
74 if ( SDL_ProcessEvents[SDL_ACTIVEEVENT] == SDL_ENABLE ) {
75 SDL_Event event;
76 SDL_memset(&event, 0, sizeof(event));
77 event.type = SDL_ACTIVEEVENT;
78 event.active.gain = gain;
79 event.active.state = state;
80 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
81 posted = 1;
82 SDL_PushEvent(&event);
83 }
84 }
85
86 /* If we lost keyboard focus, post key-up events */
87 if ( (state & SDL_APPINPUTFOCUS) && !gain ) {
88 SDL_ResetKeyboard();
89 }
90 /* If we were minimized, post button-up events */
91 if ( (state & SDL_APPACTIVE) && !gain ) {
92 SDL_ResetMouse();
93 }
94 return(posted);
95 }
96