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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "chartview.h"
#include <QMouseEvent>
ChartView::ChartView(QChart *chart, QWidget *parent)
: QChartView(chart, parent)
{
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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