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/******************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Charts module.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
******************************************************************************/
/*!
\example zoomlinechart
\title Zoom Line Example
\ingroup qtcharts_examples
\brief The example shows how to create your own custom zooming effect
The example shows how to create your own custom zooming effect with QRubberBand by using a mouse
and how to use touch gestures for paning and zooming.
\image examples_zoomlinechart1.png
\image examples_zoomlinechart2.png
Let's first create a line series with some example data.
\snippet zoomlinechart/main.cpp 1
Then we create a custom chart view by deriving from QChartView:
\snippet zoomlinechart/chartview.h 1
We override mouse and key event handling
\snippet zoomlinechart/chartview.h 2
Then we implement a custom logic for mouse and key events. For example pressing the '+' key will zoom in and pressing
the '-' key will zoom out.
\snippet zoomlinechart/chartview.cpp 1
We also create our own QChart:
\snippet zoomlinechart/chart.h 1
Where we can handle the gestures:
\snippet zoomlinechart/chart.cpp 1
Note that you will need to call grabGesture() to both QMainWindow and QChart.
*/
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