Lomiri
MouseTouchAdaptor.h
1 /*
2  * Copyright (C) 2013, 2015 Canonical Ltd.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; version 3.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  *
16  * Authored by: Daniel d'Andrada <daniel.dandrada@canonical.com>
17  */
18 
19 #ifndef MOUSE_TOUCH_ADAPTOR_H
20 #define MOUSE_TOUCH_ADAPTOR_H
21 
22 #include <QtCore/QAbstractNativeEventFilter>
23 #include <QWindow>
24 
25 #include <xcb/xcb.h>
26 
27 class QMouseEvent;
28 class QTouchDevice;
29 
30 // Transforms QMouseEvents into single-finger QTouchEvents.
31 class MouseTouchAdaptor : public QObject, public QAbstractNativeEventFilter {
32  Q_OBJECT
33 public:
34  virtual ~MouseTouchAdaptor();
35 
36  static MouseTouchAdaptor* instance();
37 
38  // Filters mouse events and posts the equivalent QTouchEvents.
39  bool nativeEventFilter(const QByteArray & eventType, void *message, long *result) override;
40 
41  Q_PROPERTY(bool enabled READ enabled WRITE setEnabled NOTIFY enabledChanged)
42 
43  bool enabled() const;
44  void setEnabled(bool value);
45 
46 Q_SIGNALS:
47  void enabledChanged(bool value);
48 
49 private:
50  MouseTouchAdaptor();
51  void fetchXInput2Info();
52  bool xi2HandleEvent(xcb_ge_event_t *event);
53 
54  bool handleButtonPress(WId windowId, uint32_t detail, uint32_t modifiers, int x, int y);
55  bool handleButtonRelease(WId windowId, uint32_t detail, uint32_t modifiers, int x, int y);
56  bool handleMotionNotify(WId windowId, uint32_t modifiers, int x, int y);
57  QWindow *findQWindowWithXWindowID(WId windowId);
58 
59  QTouchDevice *m_touchDevice;
60  bool m_leftButtonIsPressed;
61  bool m_triPressModifier;
62  bool m_quadPressModifier;
63 
64 
65  bool m_enabled;
66 
67  bool m_xi2Enabled{false};
68  int m_xi2Minor{-1};
69  int m_xiOpCode, m_xiEventBase, m_xiErrorBase;
70 };
71 
72 #endif // MOUSE_TOUCH_ADAPTOR_H