themewidget.h Example File

chartthemes/themewidget.h
 /****************************************************************************
 **
 ** 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.
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #ifndef THEMEWIDGET_H
 #define THEMEWIDGET_H

 #include <QtWidgets/QWidget>
 #include <QtCharts/QChartGlobal>

 class QComboBox;
 class QCheckBox;
 class Ui_ThemeWidgetForm;

 QT_CHARTS_BEGIN_NAMESPACE
 class QChartView;
 class QChart;
 QT_CHARTS_END_NAMESPACE

 typedef QPair<QPointF, QString> Data;
 typedef QList<Data> DataList;
 typedef QList<DataList> DataTable;

 QT_CHARTS_USE_NAMESPACE

 class ThemeWidget: public QWidget
 {
     Q_OBJECT
 public:
     explicit ThemeWidget(QWidget *parent = 0);
     ~ThemeWidget();

 private Q_SLOTS:
     void updateUI();

 private:
     DataTable generateRandomData(int listCount, int valueMax, int valueCount) const;
     void populateThemeBox();
     void populateAnimationBox();
     void populateLegendBox();
     void connectSignals();
     QChart *createAreaChart() const;
     QChart *createBarChart(int valueCount) const;
     QChart *createPieChart() const;
     QChart *createLineChart() const;
     QChart *createSplineChart() const;
     QChart *createScatterChart() const;

 private:
     int m_listCount;
     int m_valueMax;
     int m_valueCount;
     QList<QChartView *> m_charts;
     DataTable m_dataTable;

     Ui_ThemeWidgetForm *m_ui;
 };

 #endif /* THEMEWIDGET_H */