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() );
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 );
double baseline() const;
void setStyle( HistogramStyle style );
HistogramStyle style() const;
void setSymbol( const QwtColumnSymbol * );
const QwtColumnSymbol *symbol() const;
virtual void drawSeries( QPainter *,
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
QwtPlotHistogram::Columns
@ Columns
Definition: qwt_plot_histogram.h:64
QwtPlotSeriesItem::boundingRect
virtual QRectF boundingRect() const
Definition: qwt_plot_seriesitem.cpp:95
QwtPlotSeriesItem
Base class for plot items representing a series of samples.
Definition: qwt_plot_seriesitem.h:24
QwtSeriesStore
Class storing a QwtSeriesData object.
Definition: qwt_series_store.h:66
QwtPlotHistogram::Outline
@ Outline
Definition: qwt_plot_histogram.h:57
QwtPlotItem::rtti
virtual int rtti() const
Definition: qwt_plot_item.cpp:120
QwtSeriesData< QwtIntervalSample >
QwtColumnSymbol
A drawing primitive for columns.
Definition: qwt_column_symbol.h:94
QwtText
A class representing a text.
Definition: qwt_text.h:52
QwtPlotSeriesItem::drawSeries
virtual void drawSeries(QPainter *painter, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const =0
QwtPlotHistogram
QwtPlotHistogram represents a series of samples, where an interval is associated with a value ( ).
Definition: qwt_plot_histogram.h:41
QwtPlotHistogram::HistogramStyle
HistogramStyle
Definition: qwt_plot_histogram.h:50
QwtPlotHistogram::Lines
@ Lines
Definition: qwt_plot_histogram.h:69
QwtGraphic
A paint device for scalable graphics.
Definition: qwt_graphic.h:75
QwtScaleMap
A scale map.
Definition: qwt_scale_map.h:31
QwtPlotItem::legendIcon
virtual QwtGraphic legendIcon(int index, const QSizeF &) const
Definition: qwt_plot_item.cpp:371
QwtColumnRect
Directed rectangle representing bounding rectangle and orientation of a column.
Definition: qwt_column_symbol.h:29
QwtIntervalSample
A sample of the types (x1-x2, y) or (x, y1-y2)
Definition: qwt_samples.h:20