Unity 8
inputwatcher.h
1 /*
2  * Copyright (C) 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  */
17 
18 #ifndef UNITY_INPUTWATCHER_H
19 #define UNITY_INPUTWATCHER_H
20 
21 #include <QObject>
22 #include <QPointer>
23 
24 /*
25  Monitors the target object for input events to figure out whether it's pressed
26  or not.
27  */
28 class InputWatcher : public QObject
29 {
30  Q_OBJECT
31  Q_PROPERTY(QObject* target READ target WRITE setTarget NOTIFY targetChanged)
32 
33  // Whether the target object is pressed (by either touch or mouse)
34  Q_PROPERTY(bool targetPressed READ targetPressed NOTIFY targetPressedChanged)
35 public:
36  InputWatcher(QObject *parent = nullptr);
37 
38  QObject *target() const;
39  void setTarget(QObject *value);
40 
41  bool targetPressed() const;
42 
43  bool eventFilter(QObject *watched, QEvent *event) override;
44 
45 Q_SIGNALS:
46  void targetChanged(QObject *value);
47  void targetPressedChanged(bool value);
48 
49 private:
50  void setMousePressed(bool value);
51  void setTouchPressed(bool value);
52 
53  bool m_mousePressed;
54  bool m_touchPressed;
55  QPointer<QObject> m_target;
56 };
57 
58 #endif // UNITY_INPUTWATCHER_H