Qwt User's Guide 6.0.1

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# qwt_plot_curve.h

    00001 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
    00002  * Qwt Widget Library
    00003  * Copyright (C) 1997   Josef Wilgen
    00004  * Copyright (C) 2002   Uwe Rathmann
    00005  *
    00006  * This library is free software; you can redistribute it and/or
    00007  * modify it under the terms of the Qwt License, Version 1.0
    00008  *****************************************************************************/
    00009
    00010 #ifndef QWT_PLOT_CURVE_H
    00011 #define QWT_PLOT_CURVE_H
    00012
    00013 #include "qwt_global.h"
    00014 #include "qwt_plot_seriesitem.h"
    00015 #include "qwt_series_data.h"
    00016 #include "qwt_text.h"
    00017 #include <qpen.h>
    00018 #include <qstring.h>
    00019
    00020 class QPainter;
    00021 class QPolygonF;
    00022 class QwtScaleMap;
    00023 class QwtSymbol;
    00024 class QwtCurveFitter;
    00025
    00055 class QWT_EXPORT QwtPlotCurve: public QwtPlotSeriesItem<QPointF>
    00056 {
    00057 public:
    00062     enum CurveStyle
    00063     {
    00067         NoCurve = -1,
    00068
    00074         Lines,
    00075
    00080         Sticks,
    00081
    00087         Steps,
    00088
    00095         Dots,
    00096
    00102         UserCurve = 100
    00103     };
    00104
    00109     enum CurveAttribute
    00110     {
    00115         Inverted = 0x01,
    00116
    00127         Fitted = 0x02
    00128     };
    00129
    00131     typedef QFlags<CurveAttribute> CurveAttributes;
    00132
    00140     enum LegendAttribute
    00141     {
    00146         LegendNoAttribute = 0x00,
    00147
    00152         LegendShowLine = 0x01,
    00153
    00157         LegendShowSymbol = 0x02,
    00158
    00163         LegendShowBrush = 0x04
    00164     };
    00165
    00167     typedef QFlags<LegendAttribute> LegendAttributes;
    00168
    00175     enum PaintAttribute
    00176     {
    00182         ClipPolygons = 0x01,
    00183
    00190         CacheSymbols = 0x02
    00191     };
    00192
    00194     typedef QFlags<PaintAttribute> PaintAttributes;
    00195
    00196     explicit QwtPlotCurve( const QString &title = QString::null );
    00197     explicit QwtPlotCurve( const QwtText &title );
    00198
    00199     virtual ~QwtPlotCurve();
    00200
    00201     virtual int rtti() const;
    00202
    00203     void setPaintAttribute( PaintAttribute, bool on = true );
    00204     bool testPaintAttribute( PaintAttribute ) const;
    00205
    00206     void setLegendAttribute( LegendAttribute, bool on = true );
    00207     bool testLegendAttribute( LegendAttribute ) const;
    00208
    00209 #ifndef QWT_NO_COMPAT
    00210     void setRawSamples( const double *xData, const double *yData, int size );
    00211     void setSamples( const double *xData, const double *yData, int size );
    00212     void setSamples( const QVector<double> &xData, const QVector<double> &yData );
    00213 #endif
    00214     void setSamples( const QVector<QPointF> & );
    00215
    00216     int closestPoint( const QPoint &pos, double *dist = NULL ) const;
    00217
    00218     double minXValue() const;
    00219     double maxXValue() const;
    00220     double minYValue() const;
    00221     double maxYValue() const;
    00222
    00223     void setCurveAttribute( CurveAttribute, bool on = true );
    00224     bool testCurveAttribute( CurveAttribute ) const;
    00225
    00226     void setPen( const QPen & );
    00227     const QPen &pen() const;
    00228
    00229     void setBrush( const QBrush & );
    00230     const QBrush &brush() const;
    00231
    00232     void setBaseline( double ref );
    00233     double baseline() const;
    00234
    00235     void setStyle( CurveStyle style );
    00236     CurveStyle style() const;
    00237
    00238     void setSymbol( const QwtSymbol *s );
    00239     const QwtSymbol *symbol() const;
    00240
    00241     void setCurveFitter( QwtCurveFitter * );
    00242     QwtCurveFitter *curveFitter() const;
    00243
    00244     virtual void drawSeries( QPainter *,
    00245         const QwtScaleMap &xMap, const QwtScaleMap &yMap,
    00246         const QRectF &canvasRect, int from, int to ) const;
    00247
    00248     virtual void updateLegend( QwtLegend * ) const;
    00249     virtual void drawLegendIdentifier( QPainter *, const QRectF & ) const;
    00250
    00251 protected:
    00252
    00253     void init();
    00254
    00255     virtual void drawCurve( QPainter *p, int style,
    00256         const QwtScaleMap &xMap, const QwtScaleMap &yMap,
    00257         const QRectF &canvasRect, int from, int to ) const;
    00258
    00259     virtual void drawSymbols( QPainter *p, const QwtSymbol &,
    00260         const QwtScaleMap &xMap, const QwtScaleMap &yMap,
    00261         const QRectF &canvasRect, int from, int to ) const;
    00262
    00263     void drawLines( QPainter *p,
    00264         const QwtScaleMap &xMap, const QwtScaleMap &yMap,
    00265         const QRectF &canvasRect, int from, int to ) const;
    00266
    00267     void drawSticks( QPainter *p,
    00268         const QwtScaleMap &xMap, const QwtScaleMap &yMap,
    00269         const QRectF &canvasRect, int from, int to ) const;
    00270
    00271     void drawDots( QPainter *p,
    00272         const QwtScaleMap &xMap, const QwtScaleMap &yMap,
    00273         const QRectF &canvasRect, int from, int to ) const;
    00274
    00275     void drawSteps( QPainter *p,
    00276         const QwtScaleMap &xMap, const QwtScaleMap &yMap,
    00277         const QRectF &canvasRect, int from, int to ) const;
    00278
    00279     virtual void fillCurve( QPainter *,
    00280         const QwtScaleMap &, const QwtScaleMap &,
    00281         const QRectF &canvasRect, QPolygonF & ) const;
    00282
    00283     void closePolyline( QPainter *,
    00284         const QwtScaleMap &, const QwtScaleMap &, QPolygonF & ) const;
    00285
    00286 private:
    00287     class PrivateData;
    00288     PrivateData *d_data;
    00289 };
    00290
    00292 inline double QwtPlotCurve::minXValue() const
    00293 {
    00294     return boundingRect().left();
    00295 }
    00296
    00298 inline double QwtPlotCurve::maxXValue() const
    00299 {
    00300     return boundingRect().right();
    00301 }
    00302
    00304 inline double QwtPlotCurve::minYValue() const
    00305 {
    00306     return boundingRect().top();
    00307 }
    00308
    00310 inline double QwtPlotCurve::maxYValue() const
    00311 {
    00312     return boundingRect().bottom();
    00313 }
    00314
    00315 Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotCurve::PaintAttributes )
    00316 Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotCurve::LegendAttributes )
    00317 Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotCurve::CurveAttributes )
    00318
    00319 #endif