annotate src/events/SDL_active.c @ 1358:c71e05b4dc2e

More header massaging... works great on Windows. ;-)
author Sam Lantinga <slouken@libsdl.org>
date Fri, 10 Feb 2006 06:48:43 +0000
parents 3692456e7b0f
children d910939febfa
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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
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23 /* Application focus/iconification handling code for SDL */
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24
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25 #include "SDL_events.h"
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26 #include "SDL_events_c.h"
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27
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28
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29 /* These are static for our active event handling code */
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30 static Uint8 SDL_appstate = 0;
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31
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32 /* Public functions */
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33 int SDL_AppActiveInit(void)
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34 {
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35 /* Start completely active */
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36 SDL_appstate = (SDL_APPACTIVE|SDL_APPINPUTFOCUS|SDL_APPMOUSEFOCUS);
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37
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38 /* That's it! */
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39 return(0);
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40 }
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41 void SDL_AppActiveQuit(void)
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42 {
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43 }
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44
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45 Uint8 SDL_GetAppState(void)
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46 {
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47 return(SDL_appstate);
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48 }
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49
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50 /* This is global for SDL_eventloop.c */
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51 int SDL_PrivateAppActive(Uint8 gain, Uint8 state)
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52 {
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53 int posted;
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54 Uint8 new_state;
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55
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56 /* Modify the current state with the given mask */
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57 if ( gain ) {
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58 new_state = (SDL_appstate | state);
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59 } else {
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60 new_state = (SDL_appstate & ~state);
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61 }
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62
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63 /* Drop events that don't change state */
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64 if ( new_state == SDL_appstate ) {
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65 return(0);
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66 }
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67
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68 /* Update internal active state */
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69 SDL_appstate = new_state;
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70
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71 /* Post the event, if desired */
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72 posted = 0;
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73 if ( SDL_ProcessEvents[SDL_ACTIVEEVENT] == SDL_ENABLE ) {
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74 SDL_Event event;
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75 SDL_memset(&event, 0, sizeof(event));
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76 event.type = SDL_ACTIVEEVENT;
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77 event.active.gain = gain;
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78 event.active.state = state;
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79 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
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80 posted = 1;
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81 SDL_PushEvent(&event);
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82 }
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83 }
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84
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85 /* If we lost keyboard focus, post key-up events */
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86 if ( (state & SDL_APPINPUTFOCUS) && !gain ) {
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87 SDL_ResetKeyboard();
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88 }
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89 return(posted);
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90 }