themewidget.h Example File

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  #ifndef THEMEWIDGET_H
  #define THEMEWIDGET_H

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

  class QComboBox;
  class QCheckBox;

  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;
      QComboBox *createThemeBox() const;
      QComboBox *createAnimationBox() const;
      QComboBox *createLegendBox() const;
      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;

      QComboBox *m_themeComboBox;
      QCheckBox *m_antialiasCheckBox;
      QComboBox *m_animatedComboBox;
      QComboBox *m_legendComboBox;
  };

  #endif /* THEMEWIDGET_H */