1 files changed, 63 insertions, 0 deletions
diff --git a/examples/charts/zoomlinechart/chart.cpp b/examples/charts/zoomlinechart/chart.cpp
new file mode 100644
index 00000000..890c6c03
--- /dev/null
+++ b/examples/charts/zoomlinechart/chart.cpp
@@ -0,0 +1,63 @@
+/****************************************************************************
+**
+** 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 "chart.h"
+#include <QGesture>
+#include <QGraphicsScene>
+#include <QGraphicsView>
+
+Chart::Chart(QGraphicsItem *parent, Qt::WindowFlags wFlags)
+    : QChart(QChart::ChartTypeCartesian, parent, wFlags)
+{
+    // Seems that QGraphicsView (QChartView) does not grab gestures.
+    // They can only be grabbed here in the QGraphicsWidget (QChart).
+    grabGesture(Qt::PanGesture);
+    grabGesture(Qt::PinchGesture);
+}
+
+Chart::~Chart()
+{
+
+}
+
+//![1]
+bool Chart::sceneEvent(QEvent *event)
+{
+    if (event->type() == QEvent::Gesture)
+        return gestureEvent(static_cast<QGestureEvent *>(event));
+    return QChart::event(event);
+}
+
+bool Chart::gestureEvent(QGestureEvent *event)
+{
+    if (QGesture *gesture = event->gesture(Qt::PanGesture)) {
+        QPanGesture *pan = static_cast<QPanGesture *>(gesture);
+        QChart::scroll(-(pan->delta().x()), pan->delta().y());
+    }
+
+    if (QGesture *gesture = event->gesture(Qt::PinchGesture)) {
+        QPinchGesture *pinch = static_cast<QPinchGesture *>(gesture);
+        if (pinch->changeFlags() & QPinchGesture::ScaleFactorChanged)
+            QChart::zoom(pinch->scaleFactor());
+    }
+
+    return true;
+}
+//![1]