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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "chartview.h"
#include <QtGui/QMouseEvent>
#include <QtCore/QDebug>
#include <QtCharts/QAbstractAxis>
#include <QtCharts/QValueAxis>
QT_USE_NAMESPACE
ChartView::ChartView(QWidget *parent)
: QChartView(parent)
{
}
//![1]
void ChartView::keyPressEvent(QKeyEvent *event)
{
switch (event->key()) {
case Qt::Key_Plus:
chart()->zoomIn();
break;
case Qt::Key_Minus:
chart()->zoomOut();
break;
case Qt::Key_Left:
chart()->scroll(-1.0, 0);
break;
case Qt::Key_Right:
chart()->scroll(1.0, 0);
break;
case Qt::Key_Up:
chart()->scroll(0, 1.0);
break;
case Qt::Key_Down:
chart()->scroll(0, -1.0);
break;
case Qt::Key_Space:
switchChartType();
break;
default:
QGraphicsView::keyPressEvent(event);
break;
}
}
//![1]
//![2]
void ChartView::switchChartType()
{
QChart *newChart;
QChart *oldChart = chart();
if (oldChart->chartType() == QChart::ChartTypeCartesian)
newChart = new QPolarChart();
else
newChart = new QChart();
// Move series and axes from old chart to new one
const QList<QAbstractSeries *> seriesList = oldChart->series();
const QList<QAbstractAxis *> axisList = oldChart->axes();
QList<QPair<qreal, qreal> > axisRanges;
for (QAbstractAxis *axis : axisList) {
QValueAxis *valueAxis = static_cast<QValueAxis *>(axis);
axisRanges.append(QPair<qreal, qreal>(valueAxis->min(), valueAxis->max()));
}
for (QAbstractSeries *series : seriesList)
oldChart->removeSeries(series);
for (QAbstractAxis *axis : axisList) {
oldChart->removeAxis(axis);
newChart->addAxis(axis, axis->alignment());
}
for (QAbstractSeries *series : seriesList) {
newChart->addSeries(series);
for (QAbstractAxis *axis : axisList)
series->attachAxis(axis);
}
int count = 0;
for (QAbstractAxis *axis : axisList) {
axis->setRange(axisRanges[count].first, axisRanges[count].second);
count++;
}
newChart->setTitle(oldChart->title());
setChart(newChart);
delete oldChart;
}
//![2]
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