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/****************************************************************************
**
** Copyright (C) 2014 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 Enterprise Charts Add-on.
**
** $QT_BEGIN_LICENSE$
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise 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 "chartview.h"
#include <QMouseEvent>
ChartView::ChartView(QChart *chart, QWidget *parent) :
QChartView(chart, parent),
m_isTouching(false)
{
setRubberBand(QChartView::RectangleRubberBand);
}
bool ChartView::viewportEvent(QEvent *event)
{
if (event->type() == QEvent::TouchBegin) {
// By default touch events are converted to mouse events. So
// after this event we will get a mouse event also but we want
// to handle touch events as gestures only. So we need this safeguard
// to block mouse events that are actually generated from touch.
m_isTouching = true;
// Turn off animations when handling gestures they
// will only slow us down.
chart()->setAnimationOptions(QChart::NoAnimation);
}
return QChartView::viewportEvent(event);
}
void ChartView::mousePressEvent(QMouseEvent *event)
{
if (m_isTouching)
return;
QChartView::mousePressEvent(event);
}
void ChartView::mouseMoveEvent(QMouseEvent *event)
{
if (m_isTouching)
return;
QChartView::mouseMoveEvent(event);
}
void ChartView::mouseReleaseEvent(QMouseEvent *event)
{
if (m_isTouching)
m_isTouching = false;
// Because we disabled animations when touch event was detected
// we must put them back on.
chart()->setAnimationOptions(QChart::SeriesAnimations);
QChartView::mouseReleaseEvent(event);
}
//![1]
void ChartView::keyPressEvent(QKeyEvent *event)
{
switch (event->key()) {
case Qt::Key_Plus:
chart()->zoomIn();
break;
case Qt::Key_Minus:
chart()->zoomOut();
break;
//![1]
case Qt::Key_Left:
chart()->scroll(-10, 0);
break;
case Qt::Key_Right:
chart()->scroll(10, 0);
break;
case Qt::Key_Up:
chart()->scroll(0, 10);
break;
case Qt::Key_Down:
chart()->scroll(0, -10);
break;
default:
QGraphicsView::keyPressEvent(event);
break;
}
}
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