Qt 5.9 | Qt Charts | Callout Example | view.h Example File

Qt 5.9.3 Reference Documentation

# view.h Example File

callout/view.h

      /****************************************************************************
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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.
      **
      ** $QT_BEGIN_LICENSE:GPL$
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      #ifndef VIEW_H
      #define VIEW_H
      #include <QtWidgets/QGraphicsView>
      #include <QtCharts/QChartGlobal>

      class QGraphicsScene;
      class QMouseEvent;
      class QResizeEvent;

      QT_CHARTS_BEGIN_NAMESPACE
      class QChart;
      QT_CHARTS_END_NAMESPACE

      class Callout;

      QT_CHARTS_USE_NAMESPACE

      class View: public QGraphicsView
      {
          Q_OBJECT

      public:
          View(QWidget *parent = 0);

      protected:
          void resizeEvent(QResizeEvent *event);
          void mouseMoveEvent(QMouseEvent *event);

      public slots:
          void keepCallout();
          void tooltip(QPointF point, bool state);

      private:
          QGraphicsSimpleTextItem *m_coordX;
          QGraphicsSimpleTextItem *m_coordY;
          QChart *m_chart;
          Callout *m_tooltip;
          QList<Callout *> m_callouts;
      };

      #endif