File indexing completed on 2024-05-26 04:23:58

 /*
  * SPDX-FileCopyrightText: 2001-2015 Klaralvdalens Datakonsult AB. All rights reserved.
  *
  * This file is part of the KD Chart library.
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #ifndef KCHARTRINGDIAGRAM_H
 #define KCHARTRINGDIAGRAM_H
 
 #include "KChartAbstractPieDiagram.h"
 
 namespace KChart {
 
 /**
   * @brief RingDiagram defines a common ring diagram
   */
 class KCHART_EXPORT RingDiagram : public AbstractPieDiagram
 {
     Q_OBJECT
 
     Q_DISABLE_COPY( RingDiagram )
     KCHART_DECLARE_DERIVED_DIAGRAM( RingDiagram, PolarCoordinatePlane )
 
 public:
     explicit RingDiagram(
         QWidget* parent = nullptr, PolarCoordinatePlane* plane = nullptr );
     ~RingDiagram() override;
 
 protected:
     // Implement AbstractDiagram
     /** \reimpl */
     void paint( PaintContext* paintContext ) override;
 public:
     /** \reimpl */
     void resize( const QSizeF& area ) override;
 
     // Implement AbstractPolarDiagram
     /** \reimpl */
     qreal valueTotals() const override;
     /** \reimpl */
     qreal numberOfValuesPerDataset() const override;
     qreal numberOfDatasets() const override;
     /** \reimpl */
     qreal numberOfGridRings() const override;
 
     qreal valueTotals( int dataset ) const;
 
 
     /**
       * Creates an exact copy of this diagram.
       */
    virtual RingDiagram * clone() const;
 
     /**
      * Returns true if both diagrams have the same settings.
      */
     bool compare( const RingDiagram* other ) const;
 
     void setRelativeThickness( bool relativeThickness );
     bool relativeThickness() const;
 
     virtual void setExpandWhenExploded( bool expand );
     virtual bool expandWhenExploded() const;
 
 protected:
     /** \reimpl */
     const QPair<QPointF, QPointF> calculateDataBoundaries() const override;
     void paintEvent( QPaintEvent* ) override;
     void resizeEvent( QResizeEvent* ) override;
 
 private:
 
     /**
       \param painter the QPainter to draw in
       \param dataset the dataset to draw the slice for
       \param slice the slice to draw
       */
    void drawOneSlice( QPainter* painter, uint dataset, uint slice, qreal granularity );
 
     /**
       Internal method that draws the top surface of one of the slices in a ring chart.
 
       \param painter the QPainter to draw in
       \param dataset the dataset to draw the slice for
       \param slice the slice to draw
       */
    void drawPieSurface( QPainter* painter, uint dataset, uint slice, qreal granularity );
 
     /**
       * Auxiliary method returning a point to a given boundary
       * rectangle of the enclosed ellipse and an angle.
       */
    QPointF pointOnEllipse( const QRectF& rect, int dataset, int slice, bool outer, qreal angle,
                             qreal totalGapFactor, qreal totalExplodeFactor );
 }; // End of class RingDiagram
 
 }
 
 #endif // KCHARTRINGDIAGRAM_H