annotate src/events/SDL_active.c @ 4249:429c8dd3175d SDL-1.2

Fixed bug #713 Don't clamp the mouse coordinates to the video surface size, instead clamp them to the last known window size. This allows users to get the correct mouse coordinates even if they don't call SDL_SetVideoMode() in response to an SDL_VIDEORESIZE event (used as a hack to retain the OpenGL context on Windows and Linux after a window resize)
author Sam Lantinga <slouken@libsdl.org>
date Sun, 27 Sep 2009 05:18:43 +0000
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children 052dc40d917f
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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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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 }