1 | /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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2 | * Qwt Widget Library
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3 | * Copyright (C) 1997 Josef Wilgen
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4 | * Copyright (C) 2002 Uwe Rathmann
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5 | *
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6 | * This library is free software; you can redistribute it and/or
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7 | * modify it under the terms of the Qwt License, Version 1.0
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8 | *****************************************************************************/
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9 |
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10 | // vim: expandtab
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11 |
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12 | #ifndef QWT_PLOT_MARKER_H
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13 | #define QWT_PLOT_MARKER_H
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14 |
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15 | #include <qpen.h>
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16 | #include <qfont.h>
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17 | #include <qstring.h>
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18 | #include <qbrush.h>
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19 | #include "qwt_global.h"
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20 | #include "qwt_plot_item.h"
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21 |
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22 | class QRect;
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23 | class QwtText;
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24 | class QwtSymbol;
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25 |
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26 | /*!
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27 | \brief A class for drawing markers
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28 |
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29 | A marker can be a horizontal line, a vertical line,
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30 | a symbol, a label or any combination of them, which can
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31 | be drawn around a center point inside a bounding rectangle.
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32 |
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33 | The QwtPlotMarker::setSymbol() member assigns a symbol to the marker.
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34 | The symbol is drawn at the specified point.
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35 |
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36 | With QwtPlotMarker::setLabel(), a label can be assigned to the marker.
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37 | The QwtPlotMarker::setLabelAlignment() member specifies where the label is
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38 | drawn. All the Align*-constants in Qt::AlignmentFlags (see Qt documentation)
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39 | are valid. The interpretation of the alignment depends on the marker's
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40 | line style. The alignment refers to the center point of
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41 | the marker, which means, for example, that the label would be printed
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42 | left above the center point if the alignment was set to AlignLeft|AlignTop.
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43 | */
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44 |
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45 | class QWT_EXPORT QwtPlotMarker: public QwtPlotItem
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46 | {
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47 | public:
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48 |
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49 | /*!
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50 | Line styles.
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51 | \sa setLineStyle(), lineStyle()
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52 | */
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53 | enum LineStyle
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54 | {
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55 | NoLine,
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56 | HLine,
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57 | VLine,
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58 | Cross
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59 | };
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60 |
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61 | explicit QwtPlotMarker();
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62 | virtual ~QwtPlotMarker();
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63 |
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64 | virtual int rtti() const;
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65 |
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66 | double xValue() const;
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67 | double yValue() const;
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68 | QwtDoublePoint value() const;
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69 |
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70 | void setXValue(double);
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71 | void setYValue(double);
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72 | void setValue(double, double);
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73 | void setValue(const QwtDoublePoint &);
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74 |
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75 | void setLineStyle(LineStyle st);
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76 | LineStyle lineStyle() const;
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77 |
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78 | void setLinePen(const QPen &p);
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79 | const QPen &linePen() const;
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80 |
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81 | void setSymbol(const QwtSymbol &s);
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82 | const QwtSymbol &symbol() const;
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83 |
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84 | void setLabel(const QwtText&);
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85 | QwtText label() const;
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86 |
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87 | #if QT_VERSION < 0x040000
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88 | void setLabelAlignment(int align);
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89 | int labelAlignment() const;
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90 | #else
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91 | void setLabelAlignment(Qt::Alignment);
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92 | Qt::Alignment labelAlignment() const;
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93 | #endif
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94 |
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95 | void setLabelOrientation(Qt::Orientation);
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96 | Qt::Orientation labelOrientation() const;
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97 |
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98 | void setSpacing(int);
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99 | int spacing() const;
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100 |
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101 | virtual void draw(QPainter *p,
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102 | const QwtScaleMap &xMap, const QwtScaleMap &yMap,
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103 | const QRect &) const;
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104 |
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105 | virtual QwtDoubleRect boundingRect() const;
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106 |
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107 | protected:
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108 | void drawAt(QPainter *,const QRect &, const QPoint &) const;
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109 |
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110 | private:
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111 | void drawLabel(QPainter *, const QRect &, const QPoint &) const;
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112 |
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113 | class PrivateData;
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114 | PrivateData *d_data;
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115 | };
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116 |
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117 | #endif
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