KDChartPieDiagram.h

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00001 /* -*- Mode: C++ -*-
00002    KDChart - a multi-platform charting engine
00003    */
00004 
00005 /****************************************************************************
00006  ** Copyright (C) 2005-2007 Klarälvdalens Datakonsult AB.  All rights reserved.
00007  **
00008  ** This file is part of the KD Chart library.
00009  **
00010  ** This file may be distributed and/or modified under the terms of the
00011  ** GNU General Public License version 2 as published by the Free Software
00012  ** Foundation and appearing in the file LICENSE.GPL included in the
00013  ** packaging of this file.
00014  **
00015  ** Licensees holding valid commercial KD Chart licenses may use this file in
00016  ** accordance with the KD Chart Commercial License Agreement provided with
00017  ** the Software.
00018  **
00019  ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
00020  ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
00021  **
00022  ** See http://www.kdab.net/kdchart for
00023  **   information about KD Chart Commercial License Agreements.
00024  **
00025  ** Contact info@kdab.net if any conditions of this
00026  ** licensing are not clear to you.
00027  **
00028  **********************************************************************/
00029 
00030 #ifndef KDCHARTPIEDIAGRAM_H
00031 #define KDCHARTPIEDIAGRAM_H
00032 
00033 #include "KDChartAbstractPieDiagram.h"
00034 
00035 namespace KDChart {
00036 
00040 class KDCHART_EXPORT PieDiagram : public AbstractPieDiagram
00041 {
00042     Q_OBJECT
00043 
00044     Q_DISABLE_COPY( PieDiagram )
00045     KDCHART_DECLARE_DERIVED_DIAGRAM( PieDiagram, PolarCoordinatePlane )
00046 
00047 public:
00048     explicit PieDiagram(
00049         QWidget* parent = 0, PolarCoordinatePlane* plane = 0 );
00050     virtual ~PieDiagram();
00051 
00052 protected:
00053     // Implement AbstractDiagram
00055     virtual void paint ( PaintContext* paintContext );
00056 
00057 public:
00059     virtual void resize ( const QSizeF& area );
00060 
00061     // Implement AbstractPolarDiagram
00063     virtual double valueTotals () const;
00065     virtual double numberOfValuesPerDataset() const;
00067     virtual double numberOfGridRings() const;
00068 
00069     virtual PieDiagram * clone() const;
00070 
00071 protected:
00073     virtual const QPair<QPointF, QPointF> calculateDataBoundaries() const;
00074     void paintEvent( QPaintEvent* );
00075     void resizeEvent( QResizeEvent* );
00076 
00077 private:
00078     QRectF piePosition( uint dataset, uint pie ) const;
00079     void drawOnePie( QPainter* painter,
00080         uint dataset, uint pie,
00081         qreal granularity,
00082         qreal threeDPieHeight );
00083     void drawPieSurface( QPainter* painter,
00084         uint dataset, uint pie,
00085         qreal granularity );
00086     void draw3DEffect( QPainter* painter,
00087         const QRectF& drawPosition,
00088         uint dataset, uint pie,
00089         qreal granularity,
00090         const ThreeDPieAttributes& threeDAttrs,
00091         bool /*explode*/ );
00092     void drawStraightEffectSegment( QPainter* painter,
00093         const QRectF& rect,
00094         qreal threeDHeight,
00095         qreal angle );
00096     void drawUpperBrinkEffect( QPainter* painter,
00097         const QRectF& rect,
00098         qreal angle );
00099     void drawArcEffectSegment( QPainter* painter,
00100         const QRectF& rect,
00101         qreal threeDHeight,
00102         qreal startAngle,
00103         qreal endAngle,
00104         qreal granularity );
00105     void drawArcUpperBrinkEffectSegment( QPainter* painter,
00106         const QRectF& rect,
00107         qreal startAngle,
00108         qreal endAngle,
00109         qreal granularity );
00110     uint findPieAt( qreal angle, int columnCount );
00111     uint findLeftPie( uint pie, int columnCount );
00112     uint findRightPie( uint pie, int columnCount );
00113     QPointF pointOnCircle( const QRectF& rect, qreal angle );
00114 }; // End of class KDChartPieDiagram
00115 
00116 }
00117 #endif // KDCHARTPIEDIAGRA_H

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