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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.io
**
** This file is part of the Qt Charts module.
**
** Licensees holding valid commercial license for Qt may use this file in
** accordance with the Qt 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.io
**
****************************************************************************/
/*!
\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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