qwt_plot_curve.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_CURVE_H
#define QWT_PLOT_CURVE_H
 
#include "qwt_global.h"
#include "qwt_plot_seriesitem.h"
 
#include <qstring.h>
 
class QwtScaleMap;
class QwtSymbol;
class QwtCurveFitter;
template< typename T > class QwtSeriesData;
class QwtText;
class QPainter;
class QPolygonF;
class QPen;
 
class QWT_EXPORT QwtPlotCurve
    : public QwtPlotSeriesItem
    , public QwtSeriesStore< QPointF >
{
  public:
    enum CurveStyle
    {
        NoCurve = -1,
 
        Lines,
 
        Sticks,
 
        Steps,
 
        Dots,
 
        LinesAndDots,
 
        UserCurve = 100
    };
 
    enum CurveAttribute
    {
        Inverted = 0x01,
 
        Fitted = 0x02
    };
 
    Q_DECLARE_FLAGS( CurveAttributes, CurveAttribute )
 
    
    enum LegendAttribute
    {
        LegendNoAttribute = 0x00,
 
        LegendShowLine = 0x01,
 
        LegendShowSymbol = 0x02,
 
        LegendShowBrush = 0x04
    };
 
    Q_DECLARE_FLAGS( LegendAttributes, LegendAttribute )
 
    
    enum PaintAttribute
    {
        ClipPolygons = 0x01,
 
        FilterPoints = 0x02,
 
        MinimizeMemory = 0x04,
 
        ImageBuffer = 0x08,
 
        FilterPointsAggressive = 0x10,
    };
 
    Q_DECLARE_FLAGS( PaintAttributes, PaintAttribute )
 
    explicit QwtPlotCurve( const QString& title = QString() );
    explicit QwtPlotCurve( const QwtText& title );
 
    virtual ~QwtPlotCurve();
 
    virtual int rtti() const QWT_OVERRIDE;
 
    void setPaintAttribute( PaintAttribute, bool on = true );
    bool testPaintAttribute( PaintAttribute ) const;
 
    void setLegendAttribute( LegendAttribute, bool on = true );
    bool testLegendAttribute( LegendAttribute ) const;
 
    void setLegendAttributes( LegendAttributes );
    LegendAttributes legendAttributes() const;
 
    void setRawSamples( const double* xData, const double* yData, int size );
    void setRawSamples( const float* xData, const float* yData, int size );
 
    void setRawSamples( const double* yData, int size );
    void setRawSamples( const float* yData, int size );
 
    void setSamples( const double* xData, const double* yData, int size );
    void setSamples( const float* xData, const float* yData, int size );
 
    void setSamples( const double* yData, int size );
    void setSamples( const float* yData, int size );
 
    void setSamples( const QVector< double >& yData );
    void setSamples( const QVector< float >& yData );
 
    void setSamples( const QVector< double >& xData, const QVector< double >& yData );
    void setSamples( const QVector< float >& xData, const QVector< float >& yData );
 
    void setSamples( const QVector< QPointF >& );
    void setSamples( QwtSeriesData< QPointF >* );
 
    virtual int closestPoint( const QPointF& pos, double* dist = NULL ) const;
    virtual int adjacentPoint( Qt::Orientation orientation, qreal value ) const;
 
    qreal interpolatedValueAt( Qt::Orientation, double ) const;
 
    double minXValue() const;
    double maxXValue() const;
    double minYValue() const;
    double maxYValue() const;
 
    void setCurveAttribute( CurveAttribute, bool on = true );
    bool testCurveAttribute( CurveAttribute ) 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 setBaseline( double );
    double baseline() const;
 
    void setStyle( CurveStyle style );
    CurveStyle style() const;
 
    void setSymbol( QwtSymbol* );
    const QwtSymbol* symbol() const;
 
    void setCurveFitter( QwtCurveFitter* );
    QwtCurveFitter* curveFitter() const;
 
    virtual void drawSeries( QPainter*,
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect, int from, int to ) const QWT_OVERRIDE;
 
    virtual QwtGraphic legendIcon( int index, const QSizeF& ) const QWT_OVERRIDE;
 
  protected:
 
    void init();
 
    virtual void drawCurve( QPainter*, int style,
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect, int from, int to ) const;
 
    virtual void drawSymbols( QPainter*, const QwtSymbol&,
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect, int from, int to ) const;
 
    virtual void drawLines( QPainter*,
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect, int from, int to ) const;
 
    virtual void drawSticks( QPainter*,
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect, int from, int to ) const;
 
    virtual void drawDots( QPainter*,
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect, int from, int to ) const;
 
    virtual void drawSteps( QPainter*,
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect, int from, int to ) const;
 
    virtual void fillCurve( QPainter*,
        const QwtScaleMap&, const QwtScaleMap&,
        const QRectF& canvasRect, QPolygonF& ) const;
 
    void closePolyline( QPainter*,
        const QwtScaleMap&, const QwtScaleMap&, QPolygonF& ) const;
 
  private:
    class PrivateData;
    PrivateData* m_data;
};
 
inline double QwtPlotCurve::minXValue() const
{
    return boundingRect().left();
}
 
inline double QwtPlotCurve::maxXValue() const
{
    return boundingRect().right();
}
 
inline double QwtPlotCurve::minYValue() const
{
    return boundingRect().top();
}
 
inline double QwtPlotCurve::maxYValue() const
{
    return boundingRect().bottom();
}
 
Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotCurve::PaintAttributes )
Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotCurve::LegendAttributes )
Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotCurve::CurveAttributes )
 
#endif