# 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