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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Charts module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** 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 https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\example chartthemes
\title Chart Themes Example
\ingroup qtcharts_examples
\brief The example shows the look and feel of the different built-in themes.
This example shows the look and feel of the different built-in themes for some of the supported
chart types.
\image examples_chartthemes_light.png
\image examples_chartthemes_brown_sand.png
\image examples_chartthemes_blue_cerulean.png
\include examples-run.qdocinc
\section1 Creating Charts
The charts of different types are generated and added to the layout separately. For example, the
line chart is created as follows. The creation of other chart types is similar.
First a chart is created.
\snippet chartthemes/themewidget.cpp 1
A common set of random data is generated and placed in a list. This list is used in each chart
type to add data to the series of the chart. For the line series, QLineSeries instances are
created and added to the chart.
\snippet chartthemes/themewidget.cpp 2
Default axes are created for the line series. We also specify ranges for the axes based on the
range of the data used for the series.
\snippet chartthemes/themewidget.cpp 3
We also want to add more space between the labels and the y-axes. For this we specify a label
format that adds space characters to the labels.
\snippet chartthemes/themewidget.cpp 4
Finally the line chart is added to the grid layout.
\snippet chartthemes/themewidget.cpp 5
\section1 Changing Theme
The user can select a built-in theme to be used in the example. This theme is then applied to
all charts in the layout.
\snippet chartthemes/themewidget.cpp 6
\snippet chartthemes/themewidget.cpp 7
In order to give the result a more harmonious look, the background palette of the application is
customized to match the selected theme. The QPalette::Window and QPalette::WindowText roles are
set based on the selected theme.
\snippet chartthemes/themewidget.cpp 8
\section1 Changing Animation, Legend and Anti-Aliasing
In this example, it is also possible to see how changing animation, legend and anti-aliasing
affects the appearance of the chart.
Based on the user's selection, the used animation type is set on each chart. It is possible to have
no animations in the chart, or have animations for grid axis or series, or both.
\snippet chartthemes/themewidget.cpp 9
The chart can be shown with a legend. The legend can be aligned to different sides of the chart.
\snippet chartthemes/themewidget.cpp 10
The user can also see how changing anti-aliasing option changes the appearance of the chart.
Anti-aliasing is updated based on the user's selection.
\snippet chartthemes/themewidget.cpp 11
*/
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