dialogs.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 
#ifndef COMMON_DIALOG_MANAGER_H
#define COMMON_DIALOG_MANAGER_H
 
#include "common/scummsys.h"
 
#if defined(USE_SYSDIALOGS)
 
#include "common/fs.h"
#include "common/system.h"
#include "common/events.h"
 
namespace Common {
 
class DialogManager {
public:
    enum DialogResult {
        kDialogError = -1,  
        kDialogCancel = 0,  
        kDialogOk = 1       
    };
 
    DialogManager() : _wasFullscreen(false) {}
    virtual ~DialogManager() {}
 
    virtual DialogResult showFileBrowser(const Common::U32String &title, FSNode &choice, bool isDirBrowser = false) { return kDialogError; }
 
protected:
    bool _wasFullscreen;
 
    void beginDialog() {
        // If we were in fullscreen mode, switch back
        _wasFullscreen = g_system->getFeatureState(OSystem::kFeatureFullscreenMode);
        if (_wasFullscreen) {
            g_system->beginGFXTransaction();
            g_system->setFeatureState(OSystem::kFeatureFullscreenMode, false);
            g_system->endGFXTransaction();
        }
    }
 
    void endDialog() {
        // While the native file browser is open, any input events (e.g. keypresses) are
        // still received by the application. With SDL backend for example this results in the
        // events being queued and processed after we return, thus dispatching events that were
        // intended for the native file browser. For example: pressing Esc to cancel the native
        // file browser would cause the application to quit in addition to closing the
        // file browser. To avoid this happening clear all pending events.
        g_system->getEventManager()->getEventDispatcher()->clearEvents();
 
        // If we were in fullscreen mode, switch back
        if (_wasFullscreen) {
            g_system->beginGFXTransaction();
            g_system->setFeatureState(OSystem::kFeatureFullscreenMode, true);
            g_system->endGFXTransaction();
        }
    }
};
 
} // End of namespace Common
 
#endif
 
#endif // COMMON_DIALOG_MANAGER_H