|
|
/****************************************************************************
|
|
|
**
|
|
|
** Copyright (C) 2013 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;
|
|
|
}
|
|
|
}
|
|
|
|
