annotate src/events/SDL_active.c @ 4928:930614179450 SDL-1.2

Patch from Haiku's Google Code-In student Daniel Marth, fixes an off-by-one issue in bwindow.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 03 Dec 2010 16:55:25 -0800
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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 /* If we were minimized, post button-up events */
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91 if ( (state & SDL_APPACTIVE) && !gain ) {
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92 SDL_ResetMouse();
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93 }
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94 return(posted);
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95 }