text: /****************************************************************************
  **
  ** 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 VIEW_H
  #define VIEW_H
  #include <QtCharts/QChartGlobal>
  #include <QtWidgets/QGraphicsView>
  
  QT_BEGIN_NAMESPACE
  class QGraphicsScene;
  class QMouseEvent;
  class QResizeEvent;
  QT_END_NAMESPACE
  
  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
  