qwt_plot_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_BAR_CHART_H
#define QWT_PLOT_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 QwtPlotBarChart
    : public QwtPlotAbstractBarChart
    , public QwtSeriesStore< QPointF >
{
  public:
    enum LegendMode
    {
        LegendChartTitle,

        LegendBarTitles
    };

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

    virtual ~QwtPlotBarChart();

    virtual int rtti() const QWT_OVERRIDE;

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

    void setSymbol( QwtColumnSymbol* );
    const QwtColumnSymbol* symbol() const;

    void setLegendMode( LegendMode );
    LegendMode legendMode() const;

    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 QwtColumnSymbol* specialSymbol(
        int sampleIndex, const QPointF& ) const;

    virtual QwtText barTitle( int sampleIndex ) const;

  protected:
    virtual void drawSample( QPainter* painter,
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect, const QwtInterval& boundingInterval,
        int index, const QPointF& sample ) const;

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

    QwtColumnRect columnRect(
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect, const QwtInterval& boundingInterval,
        const QPointF& sample ) const;

    QList< QwtLegendData > legendData() const QWT_OVERRIDE;
    QwtGraphic legendIcon( int index, const QSizeF& ) const QWT_OVERRIDE;

  private:
    void init();

    class PrivateData;
    PrivateData* m_data;
};

#endif