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KDChartPieDiagram.h

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00001 /* -*- Mode: C++ -*-
00002    KDChart - a multi-platform charting engine
00003    */
00004 
00005 /****************************************************************************
00006  ** Copyright (C) 2005-2006 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 KDCHART_EXPORT PieDiagram : public AbstractPieDiagram
00038 {
00039     Q_OBJECT
00040 
00041     Q_DISABLE_COPY( PieDiagram )
00042     KDCHART_DECLARE_DERIVED_DIAGRAM( PieDiagram, PolarCoordinatePlane )
00043 
00044 public:
00045     explicit PieDiagram(
00046         QWidget* parent = 0, PolarCoordinatePlane* plane = 0 );
00047     virtual ~PieDiagram();
00048 
00049 protected:
00050     // Implement AbstractDiagram
00052     virtual void paint ( PaintContext* paintContext );
00053 
00054 public:
00056     virtual void resize ( const QSizeF& area );
00057 
00058     // Implement AbstractPolarDiagram
00060     virtual double valueTotals () const;
00062     virtual double numberOfValuesPerDataset() const;
00064     virtual double numberOfGridRings() const;
00065 
00066     virtual PieDiagram * clone() const;
00067 
00068 protected:
00070     virtual const QPair<QPointF, QPointF> calculateDataBoundaries() const;
00071     void paintEvent( QPaintEvent* );
00072     void resizeEvent( QResizeEvent* );
00073 
00074 private:
00075     QRectF piePosition( uint dataset, uint pie ) const;
00076     void drawOnePie( QPainter* painter,
00077         uint dataset, uint pie,
00078         qreal granularity,
00079         qreal threeDPieHeight );
00080     void drawPieSurface( QPainter* painter,
00081         uint dataset, uint pie,
00082         qreal granularity );
00083     void draw3DEffect( QPainter* painter,
00084         const QRectF& drawPosition,
00085         uint dataset, uint pie,
00086         qreal granularity,
00087         const ThreeDPieAttributes& threeDAttrs,
00088         bool /*explode*/ );
00089     void drawStraightEffectSegment( QPainter* painter,
00090         const QRectF& rect,
00091         qreal threeDHeight,
00092         qreal angle );
00093     void drawUpperBrinkEffect( QPainter* painter,
00094         const QRectF& rect,
00095         qreal angle );
00096     void drawArcEffectSegment( QPainter* painter,
00097         const QRectF& rect,
00098         qreal threeDHeight,
00099         qreal startAngle,
00100         qreal endAngle,
00101         qreal granularity );
00102     void drawArcUpperBrinkEffectSegment( QPainter* painter,
00103         const QRectF& rect,
00104         qreal startAngle,
00105         qreal endAngle,
00106         qreal granularity );
00107     uint findPieAt( qreal angle, int columnCount );
00108     uint findLeftPie( uint pie, int columnCount );
00109     uint findRightPie( uint pie, int columnCount );
00110     QPointF pointOnCircle( const QRectF& rect, qreal angle );
00111 }; // End of class KDChartPieDiagram
00112 
00113 }
00114 #endif // KDCHARTPIEDIAGRA_H

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