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qwt_plot_histogram.h
/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
* 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_HISTOGRAM_H
#define QWT_PLOT_HISTOGRAM_H
#include "qwt_global.h"
#include "qwt_plot_seriesitem.h"
#include "qwt_column_symbol.h"
#include <qcolor.h>
#include <qvector.h>
class QwtIntervalData;
class QString;
class QPolygonF;
class QWT_EXPORT QwtPlotHistogram:
public QwtPlotSeriesItem, public QwtSeriesStore<QwtIntervalSample>
{
public:
enum HistogramStyle
{
Outline,
Columns,
Lines,
UserStyle = 100
};
explicit QwtPlotHistogram( const QString &title = QString::null );
explicit QwtPlotHistogram( const QwtText &title );
virtual ~QwtPlotHistogram();
virtual int rtti() const;
void setPen( const QColor &, qreal width = 0.0, Qt::PenStyle = Qt::SolidLine );
void setPen( const QPen & );
const QPen &pen() const;
void setBrush( const QBrush & );
const QBrush &brush() const;
void setSamples( const QVector<QwtIntervalSample> & );
void setSamples( QwtSeriesData<QwtIntervalSample> * );
void setBaseline( double reference );
double baseline() const;
void setStyle( HistogramStyle style );
HistogramStyle style() const;
void setSymbol( const QwtColumnSymbol * );
const QwtColumnSymbol *symbol() const;
virtual void drawSeries( QPainter *p,
const QwtScaleMap &xMap, const QwtScaleMap &yMap,
const QRectF &canvasRect, int from, int to ) const;
virtual QRectF boundingRect() const;
virtual QwtGraphic legendIcon( int index, const QSizeF & ) const;
protected:
virtual QwtColumnRect columnRect( const QwtIntervalSample &,
const QwtScaleMap &, const QwtScaleMap & ) const;
virtual void drawColumn( QPainter *, const QwtColumnRect &,
const QwtIntervalSample & ) const;
void drawColumns( QPainter *,
const QwtScaleMap &xMap, const QwtScaleMap &yMap,
int from, int to ) const;
void drawOutline( QPainter *,
const QwtScaleMap &xMap, const QwtScaleMap &yMap,
int from, int to ) const;
void drawLines( QPainter *,
const QwtScaleMap &xMap, const QwtScaleMap &yMap,
int from, int to ) const;
private:
void init();
void flushPolygon( QPainter *, double baseLine, QPolygonF & ) const;
class PrivateData;
PrivateData *d_data;
};
#endif