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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@devolution.com
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* Application focus/iconification handling code for SDL */
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29
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30 #include <stdio.h>
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31 #include <string.h>
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32
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33 #include "SDL_events.h"
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34 #include "SDL_events_c.h"
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35
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36
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37 /* These are static for our active event handling code */
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38 static Uint8 SDL_appstate = 0;
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39
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40 /* Public functions */
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41 int SDL_AppActiveInit(void)
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42 {
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43 /* Start completely active */
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44 SDL_appstate = (SDL_APPACTIVE|SDL_APPINPUTFOCUS|SDL_APPMOUSEFOCUS);
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45
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46 /* That's it! */
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47 return(0);
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48 }
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49
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50 Uint8 SDL_GetAppState(void)
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51 {
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52 return(SDL_appstate);
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53 }
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54
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55 /* This is global for SDL_eventloop.c */
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56 int SDL_PrivateAppActive(Uint8 gain, Uint8 state)
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57 {
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58 int posted;
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59 Uint8 new_state;
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60
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61 /* Modify the current state with the given mask */
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62 if ( gain ) {
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63 new_state = (SDL_appstate | state);
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64 } else {
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65 new_state = (SDL_appstate & ~state);
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66 }
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67
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68 /* Drop events that don't change state */
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69 if ( new_state == SDL_appstate ) {
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70 return(0);
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71 }
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72
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73 /* Update internal active state */
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74 SDL_appstate = new_state;
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75
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76 /* Post the event, if desired */
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77 posted = 0;
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78 if ( SDL_ProcessEvents[SDL_ACTIVEEVENT] == SDL_ENABLE ) {
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79 SDL_Event event;
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80 memset(&event, 0, sizeof(event));
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81 event.type = SDL_ACTIVEEVENT;
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82 event.active.gain = gain;
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83 event.active.state = state;
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84 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
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85 posted = 1;
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86 SDL_PushEvent(&event);
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87 }
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88 }
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89
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90 /* If we lost keyboard focus, post key-up events */
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91 if ( (state & SDL_APPINPUTFOCUS) && !gain ) {
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92 SDL_ResetKeyboard();
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93 }
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94 return(posted);
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95 }
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