annotate include/SDL_active.h @ 4391:07b330419439 SDL-1.2

Fixed bug #849 some more: Tim Angus 2009-11-26 14:41:04 PST Fix to the cursor not being responsive when the app doesn't have SDL_APPINPUTFOCUS The problems with the directx driver are similar to the ones I introduced in the windib driver with r4478. Basically if the application did not have focus, the mouse position is not updated. It's not really that the mouse cursor was invisible, it's that it is stuck underneath another window where you can't see it. This behaviour predates my r4478 changes and is the reason I unwittingly broke the windib driver as I had been replicating the way the directx driver deals with focus. Prior to r4478 the directx driver could not be used in windowed mode, so the broken focusing would not have actually been observable. Anyway, the attached patch makes the directx driver behaves like the windib driver in terms of focus. Time for 1.2.15? ;) I've added an additional change of moving the calls to WIN_GrabInput that are made on WM_ACTIVATE messages so that they only occur when the state is SDL_APPINPUTFOCUS. When a fullscreen application is minimised using alt-tab, it still receives WM_ACTIVATE messages when other applications are selected. If WIN_GrabInput is called when the SDL application doesn't have input focus, bad things happen; it shouldn't be being called at all. I've also added a line to make sure that SDL_APPMOUSEFOCUS state is dropped when the application is minimised following an alt-tab.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 11 Dec 2009 15:24:53 +0000
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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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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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23 /**
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24 * @file SDL_active.h
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25 * Include file for SDL application focus event handling
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26 */
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28 #ifndef _SDL_active_h
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29 #define _SDL_active_h
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30
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31 #include "SDL_stdinc.h"
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32 #include "SDL_error.h"
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34 #include "begin_code.h"
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35 /* Set up for C function definitions, even when using C++ */
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36 #ifdef __cplusplus
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37 extern "C" {
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38 #endif
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39
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40 /** @name The available application states */
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41 /*@{*/
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42 #define SDL_APPMOUSEFOCUS 0x01 /**< The app has mouse coverage */
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43 #define SDL_APPINPUTFOCUS 0x02 /**< The app has input focus */
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44 #define SDL_APPACTIVE 0x04 /**< The application is active */
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45 /*@}*/
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47 /* Function prototypes */
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48 /**
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49 * This function returns the current state of the application, which is a
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50 * bitwise combination of SDL_APPMOUSEFOCUS, SDL_APPINPUTFOCUS, and
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51 * SDL_APPACTIVE. If SDL_APPACTIVE is set, then the user is able to
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52 * see your application, otherwise it has been iconified or disabled.
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53 */
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54 extern DECLSPEC Uint8 SDLCALL SDL_GetAppState(void);
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57 /* Ends C function definitions when using C++ */
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58 #ifdef __cplusplus
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59 }
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60 #endif
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61 #include "close_code.h"
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63 #endif /* _SDL_active_h */