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unity8/plugins/Ubuntu/Gestures/PressedOutsideNotifier.h
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1/*
2 * Copyright (C) 2013 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 */
17#ifndef PRESSED_OUTSIDE_NOTIFIER_H
18#define PRESSED_OUTSIDE_NOTIFIER_H
20#include <QQuickItem>
22#include <QQuickWindow>
23#include <QPointer>
24#include <QTimer>
26#include <ubuntugesturesglobal.h>
28/*
29 Notifies when a point, mouse or touch, is pressed outside its area.
31 Only enable it while needed.
32 */
33class UBUNTUGESTURES_EXPORT PressedOutsideNotifier : public QQuickItem {
34 Q_OBJECT
36public:
37 PressedOutsideNotifier(QQuickItem * parent = nullptr);
39 // From QObject
40 bool eventFilter(QObject *watched, QEvent *event) override;
42Q_SIGNALS:
43 void pressedOutside();
45protected:
46 void itemChange(ItemChange change, const ItemChangeData &value) override;
48private Q_SLOTS:
49 void setupOrTearDownEventFiltering();
51private:
52 void setupEventFiltering();
53 void tearDownEventFiltering();
54 void processFilteredTouchBegin(QTouchEvent *event);
56 QPointer<QQuickWindow> m_filteredWindow;
58 // Emits pressedOutside() signal on timeout
59 QTimer m_signalEmissionTimer;
60};
62#endif // PRESSED_OUTSIDE_NOTIFIER_H