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MouseTouchAdaptor.h
/*
* Copyright (C) 2013, 2015 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 <QWindow>
#include <xcb/xcb.h>
class QMouseEvent;
class QTouchDevice;
// Transforms QMouseEvents into single-finger QTouchEvents.
class MouseTouchAdaptor : public QObject, public QAbstractNativeEventFilter {
Q_OBJECT
public:
virtual ~MouseTouchAdaptor();
static MouseTouchAdaptor* instance();
// Filters mouse events and posts the equivalent QTouchEvents.
bool nativeEventFilter(const QByteArray & eventType, void *message, long *result) override;
Q_PROPERTY(bool enabled READ enabled WRITE setEnabled NOTIFY enabledChanged)
bool enabled() const;
void setEnabled(bool value);
Q_SIGNALS:
void enabledChanged(bool value);
private:
MouseTouchAdaptor();
void fetchXInput2Info();
bool xi2HandleEvent(xcb_ge_event_t *event);
bool handleButtonPress(WId windowId, uint32_t detail, uint32_t modifiers, int x, int y);
bool handleButtonRelease(WId windowId, uint32_t detail, uint32_t modifiers, int x, int y);
bool handleMotionNotify(WId windowId, uint32_t modifiers, int x, int y);
QWindow *findQWindowWithXWindowID(WId windowId);
QTouchDevice *m_touchDevice;
bool m_leftButtonIsPressed;
bool m_triPressModifier;
bool m_quadPressModifier;
bool m_enabled;
bool m_xi2Enabled{false};
int m_xi2Minor{-1};
int m_xiOpCode, m_xiEventBase, m_xiErrorBase;
};
#endif // MOUSE_TOUCH_ADAPTOR_H