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 
00037     class DataValueTextInfo;
00038     typedef class QVector<DataValueTextInfo> DataValueTextInfoList;
00039 
00043 class KDCHART_EXPORT PieDiagram : public AbstractPieDiagram
00044 {
00045     Q_OBJECT
00046 
00047     Q_DISABLE_COPY( PieDiagram )
00048     KDCHART_DECLARE_DERIVED_DIAGRAM( PieDiagram, PolarCoordinatePlane )
00049 
00050 public:
00051     explicit PieDiagram(
00052         QWidget* parent = 0, PolarCoordinatePlane* plane = 0 );
00053     virtual ~PieDiagram();
00054 
00055 protected:
00056     // Implement AbstractDiagram
00058     virtual void paint ( PaintContext* paintContext );
00059     void paintInternal(PaintContext* paintContext, QRectF& textBoundingRect);
00060 
00061 public:
00063     virtual void resize ( const QSizeF& area );
00064 
00065     // Implement AbstractPolarDiagram
00067     virtual double valueTotals () const;
00069     virtual double numberOfValuesPerDataset() const;
00071     virtual double numberOfGridRings() const;
00072 
00073     virtual PieDiagram * clone() const;
00074 
00075 protected:
00077     virtual const QPair<QPointF, QPointF> calculateDataBoundaries() const;
00078     void paintEvent( QPaintEvent* );
00079     void resizeEvent( QResizeEvent* );
00080 
00081 private:
00082     QRectF piePosition( uint dataset, uint pie ) const;
00083     void drawOnePie( QPainter* painter,
00084         DataValueTextInfoList* list,
00085         uint dataset, uint pie,
00086         qreal granularity,
00087         qreal threeDPieHeight );
00088     void drawPieSurface( QPainter* painter,
00089         DataValueTextInfoList* list,
00090         uint dataset, uint pie,
00091         qreal granularity );
00092     void draw3DEffect( QPainter* painter,
00093         const QRectF& drawPosition,
00094         uint dataset, uint pie,
00095         qreal granularity,
00096         const ThreeDPieAttributes& threeDAttrs,
00097         bool /*explode*/ );
00098     void drawStraightEffectSegment( QPainter* painter,
00099         const QRectF& rect,
00100         qreal threeDHeight,
00101         qreal angle );
00102     void drawUpperBrinkEffect( QPainter* painter,
00103         const QRectF& rect,
00104         qreal angle );
00105     void drawArcEffectSegment( QPainter* painter,
00106         const QRectF& rect,
00107         qreal threeDHeight,
00108         qreal startAngle,
00109         qreal endAngle,
00110         qreal granularity );
00111     void drawArcUpperBrinkEffectSegment( QPainter* painter,
00112         const QRectF& rect,
00113         qreal startAngle,
00114         qreal endAngle,
00115         qreal granularity );
00116     uint findPieAt( qreal angle, int columnCount );
00117     uint findLeftPie( uint pie, int columnCount );
00118     uint findRightPie( uint pie, int columnCount );
00119     QPointF pointOnCircle( const QRectF& rect, qreal angle );
00120 }; // End of class KDChartPieDiagram
00121 
00122 }
00123 #endif // KDCHARTPIEDIAGRAM_H

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