/*
 * Copyright (C) 2013 Canonical, Ltd.
 *
 * 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; version 3.
 *
 * 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/>.
 *
 * Authored by: Daniel d'Andrada <daniel.dandrada@canonical.com>
 */

#ifndef MOUSE_TOUCH_ADAPTOR_H
#define MOUSE_TOUCH_ADAPTOR_H

#include <QtCore/QAbstractNativeEventFilter>
#include <xcb/xcb.h>

class QMouseEvent;
class QTouchDevice;
class QWindow;

// Transforms QMouseEvents into single-finger QTouchEvents.
class MouseTouchAdaptor : public QAbstractNativeEventFilter {

public:
    MouseTouchAdaptor();

    // The window that will receive the generated QTouchEvents
    void setTargetWindow(QWindow *window);

    // Filters mouse events and posts the equivalent QTouchEvents.
    virtual bool nativeEventFilter(const QByteArray & eventType, void *message, long *result);

private:

    bool handleButtonPress(xcb_button_press_event_t *pressEvent);
    bool handleButtonRelease(xcb_button_release_event_t *releaseEvent);
    bool handleMotionNotify(xcb_motion_notify_event_t *event);

    QWindow *m_targetWindow;
    QTouchDevice *m_touchDevice;
    bool m_leftButtonIsPressed;
};

#endif // MOUSE_TOUCH_ADAPTOR_H