1 files changed, 93 insertions, 0 deletions
diff --git a/examples/charts/chartsgallery/polarchartview.cpp b/examples/charts/chartsgallery/polarchartview.cpp
new file mode 100644
index 00000000..751ae45f
--- /dev/null
+++ b/examples/charts/chartsgallery/polarchartview.cpp
@@ -0,0 +1,93 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#include "polarchartview.h"
+
+#include <QAbstractAxis>
+#include <QMouseEvent>
+#include <QPolarChart>
+#include <QValueAxis>
+
+PolarChartView::PolarChartView(QWidget *parent)
+    : QChartView(parent)
+{
+}
+
+//![1]
+void PolarChartView::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 PolarChartView::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) {
+        auto 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]