|
|
/****************************************************************************
|
|
|
**
|
|
|
** Copyright (C) 2012 Digia Plc
|
|
|
** All rights reserved.
|
|
|
** For any questions to Digia, please use contact form at http://qt.digia.com
|
|
|
**
|
|
|
** This file is part of the Qt Commercial Charts Add-on.
|
|
|
**
|
|
|
** $QT_BEGIN_LICENSE$
|
|
|
** Licensees holding valid Qt Commercial licenses may use this file in
|
|
|
** accordance with the Qt Commercial License Agreement provided with the
|
|
|
** Software or, alternatively, in accordance with the terms contained in
|
|
|
** a written agreement between you and Digia.
|
|
|
**
|
|
|
** If you have questions regarding the use of this file, please use
|
|
|
** contact form at http://qt.digia.com
|
|
|
** $QT_END_LICENSE$
|
|
|
**
|
|
|
****************************************************************************/
|
|
|
|
|
|
// W A R N I N G
|
|
|
// -------------
|
|
|
//
|
|
|
// This file is not part of the QtCommercial Chart API. It exists purely as an
|
|
|
// implementation detail. This header file may change from version to
|
|
|
// version without notice, or even be removed.
|
|
|
//
|
|
|
// We mean it.
|
|
|
|
|
|
#ifndef SCROLLER_P_H
|
|
|
#define SCROLLER_P_H
|
|
|
|
|
|
#include "qchartglobal.h"
|
|
|
#include <QBasicTimer>
|
|
|
#include <QTime>
|
|
|
#include <QPointF>
|
|
|
|
|
|
class QGraphicsSceneMouseEvent;
|
|
|
|
|
|
QTCOMMERCIALCHART_BEGIN_NAMESPACE
|
|
|
|
|
|
class Scroller;
|
|
|
class QLegend;
|
|
|
|
|
|
class ScrollTicker : public QObject
|
|
|
{
|
|
|
Q_OBJECT
|
|
|
public:
|
|
|
explicit ScrollTicker(Scroller *scroller, QObject *parent = 0);
|
|
|
void start(int interval);
|
|
|
void stop();
|
|
|
protected:
|
|
|
void timerEvent(QTimerEvent *event);
|
|
|
|
|
|
private:
|
|
|
QBasicTimer m_timer;
|
|
|
Scroller *m_scroller;
|
|
|
};
|
|
|
|
|
|
class Scroller
|
|
|
{
|
|
|
public:
|
|
|
enum State {
|
|
|
Idle,
|
|
|
Pressed,
|
|
|
Move,
|
|
|
Scroll,
|
|
|
Stop
|
|
|
};
|
|
|
|
|
|
Scroller();
|
|
|
virtual ~Scroller();
|
|
|
|
|
|
virtual void setOffset(const QPointF &point) = 0;
|
|
|
virtual QPointF offset() const = 0;
|
|
|
|
|
|
public:
|
|
|
void scrollTick();
|
|
|
|
|
|
public:
|
|
|
void mousePressEvent(QGraphicsSceneMouseEvent *event);
|
|
|
void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
|
|
|
void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
|
|
|
|
|
|
private:
|
|
|
void calculateSpeed(const QPointF &position);
|
|
|
void lowerSpeed(QPointF &speed, qreal maxSpeed = 100);
|
|
|
|
|
|
private:
|
|
|
ScrollTicker m_ticker;
|
|
|
State m_state;
|
|
|
QTime m_timeStamp;
|
|
|
QPointF m_press;
|
|
|
QPointF m_offset;
|
|
|
QPointF m_speed;
|
|
|
QPointF m_distance;
|
|
|
QPointF m_fraction;
|
|
|
int m_moveThreshold;
|
|
|
int m_timeTreshold;
|
|
|
};
|
|
|
|
|
|
QTCOMMERCIALCHART_END_NAMESPACE
|
|
|
|
|
|
#endif /* SCROLLER_P_H */
|
|
|
|
