qwt_plot_multi_barchart.h

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/******************************************************************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/

#ifndef QWT_PLOT_MULTI_BAR_CHART_H
#define QWT_PLOT_MULTI_BAR_CHART_H

#include "qwt_global.h"
#include "qwt_plot_abstract_barchart.h"

class QwtColumnRect;
class QwtColumnSymbol;
template< typename T > class QwtSeriesData;

class QWT_EXPORT QwtPlotMultiBarChart
    : public QwtPlotAbstractBarChart
    , public QwtSeriesStore< QwtSetSample >
{
  public:
    enum ChartStyle
    {
        Grouped,

        Stacked
    };

    explicit QwtPlotMultiBarChart( const QString& title = QString() );
    explicit QwtPlotMultiBarChart( const QwtText& title );

    virtual ~QwtPlotMultiBarChart();

    virtual int rtti() const QWT_OVERRIDE;

    void setBarTitles( const QList< QwtText >& );
    QList< QwtText > barTitles() const;

    void setSamples( const QVector< QwtSetSample >& );
    void setSamples( const QVector< QVector< double > >& );
    void setSamples( QwtSeriesData< QwtSetSample >* );

    void setStyle( ChartStyle style );
    ChartStyle style() const;

    void setSymbol( int valueIndex, QwtColumnSymbol* );
    const QwtColumnSymbol* symbol( int valueIndex ) const;

    void resetSymbolMap();

    virtual void drawSeries( QPainter*,
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect, int from, int to ) const QWT_OVERRIDE;

    virtual QRectF boundingRect() const QWT_OVERRIDE;

    virtual QList< QwtLegendData > legendData() const QWT_OVERRIDE;

    virtual QwtGraphic legendIcon(
        int index, const QSizeF& ) const QWT_OVERRIDE;

  protected:
    QwtColumnSymbol* symbol( int valueIndex );

    virtual QwtColumnSymbol* specialSymbol(
        int sampleIndex, int valueIndex ) const;

    virtual void drawSample( QPainter*,
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect, const QwtInterval& boundingInterval,
        int index, const QwtSetSample& ) const;

    virtual void drawBar( QPainter*, int sampleIndex,
        int valueIndex, const QwtColumnRect& ) const;

    void drawStackedBars( QPainter*,
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect, int index,
        double sampleWidth, const QwtSetSample& ) const;

    void drawGroupedBars( QPainter*,
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect, int index,
        double sampleWidth, const QwtSetSample& ) const;

  private:
    void init();

    class PrivateData;
    PrivateData* m_data;
};

#endif