|
|
/****************************************************************************
|
|
|
**
|
|
|
** 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
|
|
|
** $QT_END_LICENSE$
|
|
|
**
|
|
|
****************************************************************************/
|
|
|
|
|
|
#include "scroller_p.h"
|
|
|
#include "qlegend.h"
|
|
|
#include <QGraphicsSceneMouseEvent>
|
|
|
#include <QDebug>
|
|
|
|
|
|
QTCOMMERCIALCHART_BEGIN_NAMESPACE
|
|
|
|
|
|
Scroller::Scroller()
|
|
|
: m_ticker(this),
|
|
|
m_state(Idle),
|
|
|
m_moveThreshold(10),
|
|
|
m_timeTreshold(50)
|
|
|
{
|
|
|
|
|
|
}
|
|
|
|
|
|
Scroller::~Scroller()
|
|
|
{
|
|
|
}
|
|
|
|
|
|
void Scroller::mousePressEvent(QGraphicsSceneMouseEvent *event)
|
|
|
{
|
|
|
if (event->button() == Qt::LeftButton) {
|
|
|
switch (m_state) {
|
|
|
case Idle:
|
|
|
m_state = Pressed;
|
|
|
m_offset = offset();
|
|
|
m_press = event->pos();
|
|
|
m_timeStamp = QTime::currentTime();
|
|
|
event->accept();
|
|
|
break;
|
|
|
case Scroll:
|
|
|
m_state = Stop;
|
|
|
m_speed = QPointF(0, 0);
|
|
|
m_offset = offset();
|
|
|
m_press = event->pos();
|
|
|
event->accept();
|
|
|
break;
|
|
|
case Pressed:
|
|
|
case Move:
|
|
|
case Stop:
|
|
|
qWarning() << __FUNCTION__ << "Scroller unexpected state" << m_state;
|
|
|
event->ignore();
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
void Scroller::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
|
|
|
{
|
|
|
QPointF delta = event->pos() - m_press;
|
|
|
|
|
|
switch (m_state) {
|
|
|
case Pressed:
|
|
|
case Stop:
|
|
|
if (qAbs(delta.x()) > m_moveThreshold || qAbs(delta.y()) > m_moveThreshold) {
|
|
|
m_state = Move;
|
|
|
m_timeStamp = QTime::currentTime();
|
|
|
m_distance = QPointF(0, 0);
|
|
|
m_press = event->pos();
|
|
|
event->accept();
|
|
|
} else {
|
|
|
event->ignore();
|
|
|
}
|
|
|
break;
|
|
|
case Move:
|
|
|
setOffset(m_offset - delta);
|
|
|
calculateSpeed(event->pos());
|
|
|
event->accept();
|
|
|
break;
|
|
|
case Idle:
|
|
|
case Scroll:
|
|
|
qWarning() << __FUNCTION__ << "Scroller unexpected state" << m_state;
|
|
|
event->ignore();
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
void Scroller::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
|
|
|
{
|
|
|
if (event->button() == Qt::LeftButton) {
|
|
|
|
|
|
switch (m_state) {
|
|
|
|
|
|
case Scroll:
|
|
|
m_state = Stop;
|
|
|
m_speed = QPointF(0, 0);
|
|
|
m_offset = offset();
|
|
|
event->accept();
|
|
|
break;
|
|
|
case Pressed:
|
|
|
m_state = Idle;
|
|
|
//if (m_timeStamp.elapsed() < m_clickedPressDelay) {
|
|
|
|
|
|
//emit clicked(m_offset.toPoint());
|
|
|
//}
|
|
|
event->accept();
|
|
|
break;
|
|
|
case Move:
|
|
|
calculateSpeed(event->pos());
|
|
|
m_offset = offset();
|
|
|
m_press = event->pos();
|
|
|
if (m_speed == QPointF(0, 0)) {
|
|
|
m_state = Idle;
|
|
|
} else {
|
|
|
m_speed /= 3.75;
|
|
|
m_state = Scroll;
|
|
|
m_ticker.start(25);
|
|
|
}
|
|
|
event->accept();
|
|
|
break;
|
|
|
case Stop:
|
|
|
case Idle:
|
|
|
qWarning() << __FUNCTION__ << "Scroller unexpected state" << m_state;
|
|
|
event->ignore();
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
void Scroller::scrollTick()
|
|
|
{
|
|
|
switch (m_state) {
|
|
|
case Scroll:
|
|
|
lowerSpeed(m_speed);
|
|
|
setOffset(m_offset - m_speed);
|
|
|
m_offset = offset();
|
|
|
if (m_speed == QPointF(0, 0)) {
|
|
|
m_state = Idle;
|
|
|
m_ticker.stop();
|
|
|
}
|
|
|
break;
|
|
|
case Stop:
|
|
|
m_ticker.stop();
|
|
|
break;
|
|
|
case Idle:
|
|
|
case Move:
|
|
|
case Pressed:
|
|
|
qWarning() << __FUNCTION__ << "Scroller unexpected state" << m_state;
|
|
|
m_ticker.stop();
|
|
|
break;
|
|
|
|
|
|
}
|
|
|
}
|
|
|
|
|
|
void Scroller::lowerSpeed(QPointF &speed, qreal maxSpeed)
|
|
|
{
|
|
|
qreal x = qBound(-maxSpeed, speed.x(), maxSpeed);
|
|
|
qreal y = qBound(-maxSpeed, speed.y(), maxSpeed);
|
|
|
|
|
|
x = (x == 0) ? x :
|
|
|
(x > 0) ? qMax(qreal(0), x - m_fraction.x()) : qMin(qreal(0), x + m_fraction.x());
|
|
|
y = (y == 0) ? y :
|
|
|
(y > 0) ? qMax(qreal(0), y - m_fraction.y()) : qMin(qreal(0), y + m_fraction.y());
|
|
|
speed.setX(x);
|
|
|
speed.setY(y);
|
|
|
}
|
|
|
|
|
|
void Scroller::calculateSpeed(const QPointF &position)
|
|
|
{
|
|
|
if (m_timeStamp.elapsed() > m_timeTreshold) {
|
|
|
|
|
|
QPointF distance = position - m_press;
|
|
|
|
|
|
m_timeStamp = QTime::currentTime();
|
|
|
m_speed = distance - m_distance;
|
|
|
m_distance = distance;
|
|
|
|
|
|
qreal fraction = qMax(qAbs(m_speed.x()), qAbs(m_speed.y()));
|
|
|
|
|
|
if (fraction != 0) {
|
|
|
m_fraction.setX(qAbs(m_speed.x() / fraction));
|
|
|
m_fraction.setY(qAbs(m_speed.y() / fraction));
|
|
|
} else {
|
|
|
m_fraction.setX(1);
|
|
|
m_fraction.setY(1);
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
ScrollTicker::ScrollTicker(Scroller *scroller, QObject *parent)
|
|
|
: QObject(parent),
|
|
|
m_scroller(scroller)
|
|
|
{
|
|
|
|
|
|
}
|
|
|
|
|
|
void ScrollTicker::start(int interval)
|
|
|
{
|
|
|
if (!m_timer.isActive())
|
|
|
m_timer.start(interval, this);
|
|
|
}
|
|
|
|
|
|
void ScrollTicker::stop()
|
|
|
{
|
|
|
m_timer.stop();
|
|
|
}
|
|
|
|
|
|
void ScrollTicker::timerEvent(QTimerEvent *event)
|
|
|
{
|
|
|
Q_UNUSED(event);
|
|
|
m_scroller->scrollTick();
|
|
|
}
|
|
|
|
|
|
#include "moc_scroller_p.cpp"
|
|
|
|
|
|
QTCOMMERCIALCHART_END_NAMESPACE
|
|
|
|
