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dialogs.h

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00001 /* ScummVM - Graphic Adventure Engine
00002  *
00003  * ScummVM is the legal property of its developers, whose names
00004  * are too numerous to list here. Please refer to the COPYRIGHT
00005  * file distributed with this source distribution.
00006  *
00007  * This program is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU General Public License
00009  * as published by the Free Software Foundation; either version 2
00010  * of the License, or (at your option) any later version.
00011  *
00012  * This program is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with this program; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
00020  *
00021  */
00022 
00023 #ifndef COMMON_DIALOG_MANAGER_H
00024 #define COMMON_DIALOG_MANAGER_H
00025 
00026 #include "common/scummsys.h"
00027 
00028 #if defined(USE_SYSDIALOGS)
00029 
00030 #include "common/fs.h"
00031 #include "common/system.h"
00032 #include "common/events.h"
00033 
00034 namespace Common {
00035 
00039 class DialogManager {
00040 public:
00044     enum DialogResult {
00045         kDialogError = -1,  
00046         kDialogCancel = 0,  
00047         kDialogOk = 1       
00048     };
00049 
00050     DialogManager() : _wasFullscreen(false) {}
00051     virtual ~DialogManager() {}
00052 
00061     virtual DialogResult showFileBrowser(const char *title, FSNode &choice, bool isDirBrowser = false) { return kDialogError; }
00062 
00063 protected:
00064     bool _wasFullscreen;
00065 
00069     void beginDialog() {
00070         // If we were in fullscreen mode, switch back
00071         _wasFullscreen = g_system->getFeatureState(OSystem::kFeatureFullscreenMode);
00072         if (_wasFullscreen) {
00073             g_system->beginGFXTransaction();
00074             g_system->setFeatureState(OSystem::kFeatureFullscreenMode, false);
00075             g_system->endGFXTransaction();
00076         }
00077     }
00078 
00082     void endDialog() {
00083         // While the native file browser is open, any input events (e.g. keypresses) are
00084         // still received by the application. With SDL backend for example this results in the
00085         // events beeing queued and processed after we return, thus dispatching events that were
00086         // intended for the native file browser. For example: pressing Esc to cancel the native
00087         // file browser would cause the application to quit in addition to closing the
00088         // file browser. To avoid this happening clear all pending events.
00089         g_system->getEventManager()->getEventDispatcher()->clearEvents();
00090 
00091         // If we were in fullscreen mode, switch back
00092         if (_wasFullscreen) {
00093             g_system->beginGFXTransaction();
00094             g_system->setFeatureState(OSystem::kFeatureFullscreenMode, true);
00095             g_system->endGFXTransaction();
00096         }
00097     }
00098 };
00099 
00100 } // End of namespace Common
00101 
00102 #endif
00103 
00104 #endif // COMMON_DIALOG_MANAGER_H


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