Qt 5.7 | Qt Charts | Legend Example | mainwidget.h Example File

Qt 5.7.1 Reference Documentation

# mainwidget.h Example File

legend/mainwidget.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
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      ** Alternatively, this file may be used under the terms of the GNU
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      #ifndef MAINWIDGET_H
      #define MAINWIDGET_H

      #include <QtCharts/QChartGlobal>
      #include <QtCharts/QChart>
      #include <QtCharts/QChartView>
      #include <QtWidgets/QWidget>
      #include <QtWidgets/QGraphicsWidget>
      #include <QtWidgets/QGridLayout>
      #include <QtWidgets/QGraphicsGridLayout>
      #include <QtWidgets/QDoubleSpinBox>
      #include <QtWidgets/QGroupBox>
      #include <QtCharts/QBarSeries>

      QT_CHARTS_USE_NAMESPACE

      class MainWidget : public QWidget
      {
          Q_OBJECT
      public:
          explicit MainWidget(QWidget *parent = 0);
          void createSeries();
          void showLegendSpinbox();
          void hideLegendSpinbox();

      public Q_SLOTS:
          void toggleAttached();
          void addBarset();
          void removeBarset();

          void setLegendAlignment();

          void toggleBold();
          void toggleItalic();
          void fontSizeChanged();

          void updateLegendLayout();

      private:
          QChart *m_chart;
          QBarSeries *m_series;

          QChartView *m_chartView;
          QGridLayout *m_mainLayout;
          QGridLayout *m_buttonLayout;
          QGridLayout *m_fontLayout;

          QDoubleSpinBox *m_fontSize;

          // For detached layout
          QGroupBox *m_legendSettings;
          QDoubleSpinBox *m_legendPosX;
          QDoubleSpinBox *m_legendPosY;
          QDoubleSpinBox *m_legendWidth;
          QDoubleSpinBox *m_legendHeight;
      };

      #endif // MAINWIDGET_H