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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2006 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 Lesser General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2.1 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 Lesser 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 Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 #include "SDL_config.h" |
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23 |
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24 /* Application focus/iconification handling code for SDL */ |
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25 |
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26 #include "SDL_events.h" |
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27 #include "SDL_events_c.h" |
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28 |
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29 |
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30 /* These are static for our active event handling code */ |
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31 static Uint8 SDL_appstate = 0; |
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32 |
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33 /* Public functions */ |
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34 int SDL_AppActiveInit(void) |
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35 { |
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36 /* Start completely active */ |
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37 SDL_appstate = (SDL_APPACTIVE|SDL_APPINPUTFOCUS|SDL_APPMOUSEFOCUS); |
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38 |
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39 /* That's it! */ |
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40 return(0); |
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41 } |
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42 void SDL_AppActiveQuit(void) |
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43 { |
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44 } |
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45 |
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46 Uint8 SDL_GetAppState(void) |
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47 { |
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48 return(SDL_appstate); |
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49 } |
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50 |
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51 /* This is global for SDL_eventloop.c */ |
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52 int SDL_PrivateAppActive(Uint8 gain, Uint8 state) |
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53 { |
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54 int posted; |
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55 Uint8 new_state; |
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56 |
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57 /* Modify the current state with the given mask */ |
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58 if ( gain ) { |
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59 new_state = (SDL_appstate | state); |
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60 } else { |
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61 new_state = (SDL_appstate & ~state); |
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62 } |
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63 |
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64 /* Drop events that don't change state */ |
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65 if ( new_state == SDL_appstate ) { |
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66 return(0); |
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67 } |
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68 |
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69 /* Update internal active state */ |
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70 SDL_appstate = new_state; |
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71 |
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72 /* Post the event, if desired */ |
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73 posted = 0; |
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74 if ( SDL_ProcessEvents[SDL_ACTIVEEVENT] == SDL_ENABLE ) { |
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75 SDL_Event event; |
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76 SDL_memset(&event, 0, sizeof(event)); |
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77 event.type = SDL_ACTIVEEVENT; |
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78 event.active.gain = gain; |
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79 event.active.state = state; |
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80 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) { |
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81 posted = 1; |
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82 SDL_PushEvent(&event); |
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83 } |
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84 } |
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85 |
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86 /* If we lost keyboard focus, post key-up events */ |
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87 if ( (state & SDL_APPINPUTFOCUS) && !gain ) { |
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88 SDL_ResetKeyboard(); |
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89 } |
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90 return(posted); |
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91 } |