KD Chart 2  [rev.2.5]
KDChartRingDiagram.h
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00001 /****************************************************************************
00002 ** Copyright (C) 2001-2012 Klaralvdalens Datakonsult AB.  All rights reserved.
00003 **
00004 ** This file is part of the KD Chart library.
00005 **
00006 ** Licensees holding valid commercial KD Chart licenses may use this file in
00007 ** accordance with the KD Chart Commercial License Agreement provided with
00008 ** the Software.
00009 **
00010 **
00011 ** This file may be distributed and/or modified under the terms of the
00012 ** GNU General Public License version 2 and version 3 as published by the
00013 ** Free Software Foundation and appearing in the file LICENSE.GPL.txt included.
00014 **
00015 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
00016 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
00017 **
00018 ** Contact info@kdab.com if any conditions of this licensing are not
00019 ** clear to you.
00020 **
00021 **********************************************************************/
00022 
00023 #ifndef KDCHARTRINGDIAGRAM_H
00024 #define KDCHARTRINGDIAGRAM_H
00025 
00026 #include "KDChartAbstractPieDiagram.h"
00027 
00028 namespace KDChart {
00029 
00033 class KDCHART_EXPORT RingDiagram : public AbstractPieDiagram
00034 {
00035     Q_OBJECT
00036 
00037     Q_DISABLE_COPY( RingDiagram )
00038     KDCHART_DECLARE_DERIVED_DIAGRAM( RingDiagram, PolarCoordinatePlane )
00039 
00040 public:
00041     explicit RingDiagram(
00042         QWidget* parent = 0, PolarCoordinatePlane* plane = 0 );
00043     virtual ~RingDiagram();
00044 
00045 protected:
00046     // Implement AbstractDiagram
00048     virtual void paint( PaintContext* paintContext );
00049 public:
00051     virtual void resize( const QSizeF& area );
00052 
00053     // Implement AbstractPolarDiagram
00055     virtual qreal valueTotals() const;
00057     virtual qreal numberOfValuesPerDataset() const;
00058     virtual qreal numberOfDatasets() const;
00060     virtual qreal numberOfGridRings() const;
00061 
00062     qreal valueTotals( int dataset ) const;
00063 
00064     virtual RingDiagram * clone() const;
00065 
00069     bool compare( const RingDiagram* other ) const;
00070 
00071     void setRelativeThickness( bool relativeThickness );
00072     bool relativeThickness() const;
00073 
00074     virtual void setExpandWhenExploded( bool expand );
00075     virtual bool expandWhenExploded() const;
00076 
00077 protected:
00079     virtual const QPair<QPointF, QPointF> calculateDataBoundaries() const;
00080     void paintEvent( QPaintEvent* );
00081     void resizeEvent( QResizeEvent* );
00082 
00083 private:
00084     void drawOneSlice( QPainter* painter, uint dataset, uint slice, qreal granularity );
00085     void drawPieSurface( QPainter* painter, uint dataset, uint slice, qreal granularity );
00086     QPointF pointOnEllipse( const QRectF& rect, int dataset, int slice, bool outer, qreal angle,
00087                             qreal totalGapFactor, qreal totalExplodeFactor );
00088 }; // End of class RingDiagram
00089 
00090 }
00091 
00092 #endif // KDCHARTRINGDIAGRAM_H
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