qwt_plot_abstract_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_ABSTRACT_BAR_CHART_H
#define QWT_PLOT_ABSTRACT_BAR_CHART_H

#include "qwt_global.h"
#include "qwt_plot_seriesitem.h"

class QWT_EXPORT QwtPlotAbstractBarChart : public QwtPlotSeriesItem
{
  public:
    enum LayoutPolicy
    {
        AutoAdjustSamples,

        ScaleSamplesToAxes,

        ScaleSampleToCanvas,

        FixedSampleSize
    };

    explicit QwtPlotAbstractBarChart( const QwtText& title );
    virtual ~QwtPlotAbstractBarChart();

    void setLayoutPolicy( LayoutPolicy );
    LayoutPolicy layoutPolicy() const;

    void setLayoutHint( double );
    double layoutHint() const;

    void setSpacing( int );
    int spacing() const;

    void setMargin( int );
    int margin() const;

    void setBaseline( double );
    double baseline() const;

    virtual void getCanvasMarginHint(
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect, double& left, double& top,
        double& right, double& bottom) const QWT_OVERRIDE;


  protected:
    double sampleWidth( const QwtScaleMap& map,
        double canvasSize, double boundingSize,
        double value ) const;

  private:
    class PrivateData;
    PrivateData* m_data;
};

#endif