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.
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/
  
  //  W A R N I N G
  //  -------------
  //
  // This file is not part of the Qt Chart API.  It exists purely as an
  // implementation detail.  This header file may change from version to
  // version without notice, or even be removed.
  //
  // We mean it.
  
  #ifndef QLEGEND_P_H
  #define QLEGEND_P_H
  
  #include <QtCharts/QLegend>
  
  QT_CHARTS_BEGIN_NAMESPACE
  
  class QChart;
  class ChartPresenter;
  class QAbstractSeries;
  class LegendLayout;
  class QLegendMarker;
  
  class QLegendPrivate : public QObject
  {
      Q_OBJECT
  public:
      QLegendPrivate(ChartPresenter *presenter, QChart *chart, QLegend *q);
      ~QLegendPrivate();
  
      void setOffset(const QPointF &offset);
      QPointF offset() const;
      int roundness(qreal size);
  
      QGraphicsItemGroup* items() { return m_items; }
  
      QList<QLegendMarker*> markers(QAbstractSeries *series = 0);
  
  public Q_SLOTS:
      void handleSeriesAdded(QAbstractSeries *series);
      void handleSeriesRemoved(QAbstractSeries *series);
      void handleSeriesVisibleChanged();
      void handleCountChanged();
  
  private:
      // Internal helpers
      void addMarkers(QList<QLegendMarker *> markers);
      void removeMarkers(QList<QLegendMarker *> markers);
      void decorateMarkers(QList<QLegendMarker *> markers);
      void updateToolTips();
  
  private:
      QLegend *q_ptr;
      ChartPresenter *m_presenter;
      LegendLayout *m_layout;
      QChart *m_chart;
      QGraphicsItemGroup *m_items;
      Qt::Alignment m_alignment;
      QBrush m_brush;
      QPen m_pen;
      QFont m_font;
      QBrush m_labelBrush;
  
      qreal m_diameter;
      bool m_attachedToChart;
      bool m_backgroundVisible;
      bool m_reverseMarkers;
      bool m_showToolTips;
  
      QList<QLegendMarker *> m_markers;
      QList<QAbstractSeries *> m_series;
  
      QHash<QGraphicsItem *, QLegendMarker *> m_markerHash;
  
      friend class QLegend;
      friend class LegendMarkerItem;
      friend class LegendLayout;
      friend class QLegendMarkerPrivate;
      friend class LegendScroller;
  };
  
  QT_CHARTS_END_NAMESPACE
  
  #endif
  