qwt_plot_multi_barchart.h

/******************************************************************************
 * 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
 *
 * Modified by ChenZongYan in 2024 <czy.t@163.com>
 *   Summary of major modifications (see ChangeLog.md for full history):
 *   1. CMake build system & C++11 throughout.
 *   2. Core panner/ zoomer refactored:
 *        - QwtPanner → QwtCachePanner (pixmap-cache version)
 *        - New real-time QwtPlotPanner derived from QwtPicker.
 *   3. Zoomer supports multi-axis.
 *   4. Parasite-plot framework:
 *        - QwtFigure, QwtPlotParasiteLayout, QwtPlotTransparentCanvas,
 *        - QwtPlotScaleEventDispatcher, built-in pan/zoom on axis.
 *   5. New picker: QwtPlotSeriesDataPicker (works with date axis).
 *   6. Raster & color-map extensions:
 *        - QwtGridRasterData (2-D table + interpolation)
 *        - QwtLinearColorMap::stopColors(), stopPos() API rename.
 *   7. Bar-chart: expose pen/brush control.
 *   8. Amalgamated build: single QwtPlot.h / QwtPlot.cpp pair in src-amalgamate.
 *****************************************************************************/
 
#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