ground/gcs/src/libs/qwt/src/qwt_plot_intervalcurve.h

   1 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
   2  * Qwt Widget Library
   3  * Copyright (C) 1997   Josef Wilgen
   4  * Copyright (C) 2002   Uwe Rathmann
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the Qwt License, Version 1.0
   8  *****************************************************************************/
   9
  10 #ifndef QWT_PLOT_INTERVAL_CURVE_H
  11 #define QWT_PLOT_INTERVAL_CURVE_H
  12
  13 #include "qwt_global.h"
  14 #include "qwt_plot_seriesitem.h"
  15 #include "qwt_series_data.h"
  16
  17 class QwtIntervalSymbol;
  18
  19 /*!
  20   \brief QwtPlotIntervalCurve represents a series of samples, where each value
  21          is associated with an interval ( \f$[y1,y2] = f(x)\f$ ).
  22
  23   The representation depends on the style() and an optional symbol()
  24   that is displayed for each interval. QwtPlotIntervalCurve might be used
  25   to display error bars or the area between 2 curves.
  26 */
  27 class QWT_EXPORT QwtPlotIntervalCurve:
  28     public QwtPlotSeriesItem, public QwtSeriesStore<QwtIntervalSample>
  29 {
  30 public:
  31     /*!
  32         \brief Curve styles.
  33         The default setting is QwtPlotIntervalCurve::Tube.
  34
  35         \sa setStyle(), style()
  36     */
  37     enum CurveStyle
  38     {
  39         /*!
  40            Don't draw a curve. Note: This doesn't affect the symbols.
  41          */
  42         NoCurve,
  43
  44         /*!
  45            Build 2 curves from the upper and lower limits of the intervals
  46            and draw them with the pen(). The area between the curves is
  47            filled with the brush().
  48          */
  49         Tube,
  50
  51         /*!
  52            Styles >= QwtPlotIntervalCurve::UserCurve are reserved for derived
  53            classes that overload drawSeries() with
  54            additional application specific curve types.
  55          */
  56         UserCurve = 100
  57     };
  58
  59     /*!
  60         Attributes to modify the drawing algorithm.
  61         \sa setPaintAttribute(), testPaintAttribute()
  62     */
  63     enum PaintAttribute
  64     {
  65         /*!
  66           Clip polygons before painting them. In situations, where points
  67           are far outside the visible area (f.e when zooming deep) this
  68           might be a substantial improvement for the painting performance.
  69          */
  70         ClipPolygons = 0x01,
  71
  72         //! Check if a symbol is on the plot canvas before painting it.
  73         ClipSymbol   = 0x02
  74     };
  75
  76     //! Paint attributes
  77     typedef QFlags<PaintAttribute> PaintAttributes;
  78
  79     explicit QwtPlotIntervalCurve( const QString &title = QString::null );
  80     explicit QwtPlotIntervalCurve( const QwtText &title );
  81
  82     virtual ~QwtPlotIntervalCurve();
  83
  84     virtual int rtti() const;
  85
  86     void setPaintAttribute( PaintAttribute, bool on = true );
  87     bool testPaintAttribute( PaintAttribute ) const;
  88
  89     void setSamples( const QVector<QwtIntervalSample> & );
  90     void setSamples( QwtSeriesData<QwtIntervalSample> * );
  91
  92     void setPen( const QColor &, qreal width = 0.0, Qt::PenStyle = Qt::SolidLine );
  93     void setPen( const QPen & );
  94     const QPen &pen() const;
  95
  96     void setBrush( const QBrush & );
  97     const QBrush &brush() const;
  98
  99     void setStyle( CurveStyle style );
 100     CurveStyle style() const;
 101
 102     void setSymbol( const QwtIntervalSymbol * );
 103     const QwtIntervalSymbol *symbol() const;
 104
 105     virtual void drawSeries( QPainter *p,
 106         const QwtScaleMap &xMap, const QwtScaleMap &yMap,
 107         const QRectF &canvasRect, int from, int to ) const;
 108
 109     virtual QRectF boundingRect() const;
 110
 111     virtual QwtGraphic legendIcon( int index, const QSizeF & ) const;
 112
 113 protected:
 114
 115     void init();
 116
 117     virtual void drawTube( QPainter *,
 118         const QwtScaleMap &xMap, const QwtScaleMap &yMap,
 119         const QRectF &canvasRect, int from, int to ) const;
 120
 121     virtual void drawSymbols( QPainter *, const QwtIntervalSymbol &,
 122         const QwtScaleMap &xMap, const QwtScaleMap &yMap,
 123         const QRectF &canvasRect, int from, int to ) const;
 124
 125 private:
 126     class PrivateData;
 127     PrivateData *d_data;
 128 };
 129
 130 Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotIntervalCurve::PaintAttributes )
 131
 132 #endif