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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtBrowser project.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPLv2 included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/gpl-2.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef TOUCHTRACKER_H
#define TOUCHTRACKER_H
#include <QObject>
#include <QQuickItem>
class TouchTracker : public QQuickItem
{
Q_OBJECT
Q_PROPERTY(qreal touchX READ touchX NOTIFY touchChanged)
Q_PROPERTY(qreal touchY READ touchY NOTIFY touchChanged)
Q_PROPERTY(int xVelocity READ xVelocity NOTIFY velocityChanged)
Q_PROPERTY(int yVelocity READ yVelocity NOTIFY velocityChanged)
Q_PROPERTY(bool blockEvents READ blockEvents WRITE setBlockEvents NOTIFY blockEventsChanged)
Q_PROPERTY(QQuickItem* target READ target WRITE setTarget NOTIFY targetChanged)
struct PositionInfo
{
QPointF pos;
qint64 ts;
qreal x() const { return pos.x(); }
qreal y() const { return pos.y(); }
};
public:
TouchTracker(QQuickItem *parent = 0);
qreal touchX() const;
qreal touchY() const;
int xVelocity() const;
int yVelocity() const;
QQuickItem* target() const;
bool blockEvents() const;
void setBlockEvents(bool shouldBlock);
void setTarget(QQuickItem * target);
signals:
void touchChanged();
void blockEventsChanged();
void targetChanged();
void touchBegin();
void touchEnd();
void velocityChanged();
void scrollDirectionChanged();
protected:
bool eventFilter(QObject *obj, QEvent *event);
void touchEvent(QTouchEvent *event) override;
private:
bool m_blockEvents;
int m_diff;
int m_previousY;
PositionInfo m_startPoint;
PositionInfo m_currentPoint;
QQuickItem *m_target;
QQuickItem *m_delegate;
};
#endif // TOUCHTRACKER_H
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