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_PICKER_H
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13 | #define QWT_PLOT_PICKER_H
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14 |
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15 | #include "qwt_double_rect.h"
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16 | #include "qwt_plot_canvas.h"
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17 | #include "qwt_picker.h"
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18 |
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19 | class QwtPlot;
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20 |
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21 | /*!
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22 | \brief QwtPlotPicker provides selections on a plot canvas
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23 |
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24 | QwtPlotPicker is a QwtPicker tailored for selections on
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25 | a plot canvas. It is set to a x-Axis and y-Axis and
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26 | translates all pixel coordinates into this coodinate system.
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27 | */
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28 |
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29 | class QWT_EXPORT QwtPlotPicker: public QwtPicker
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30 | {
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31 | Q_OBJECT
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32 |
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33 | public:
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34 | explicit QwtPlotPicker(QwtPlotCanvas *);
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35 | virtual ~QwtPlotPicker();
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36 |
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37 | explicit QwtPlotPicker(int xAxis, int yAxis,
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38 | QwtPlotCanvas *);
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39 |
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40 | explicit QwtPlotPicker(int xAxis, int yAxis, int selectionFlags,
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41 | RubberBand rubberBand, DisplayMode trackerMode,
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42 | QwtPlotCanvas *);
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43 |
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44 | virtual void setAxis(int xAxis, int yAxis);
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45 |
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46 | int xAxis() const;
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47 | int yAxis() const;
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48 |
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49 | QwtPlot *plot();
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50 | const QwtPlot *plot() const;
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51 |
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52 | QwtPlotCanvas *canvas();
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53 | const QwtPlotCanvas *canvas() const;
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54 |
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55 | signals:
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56 |
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57 | /*!
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58 | A signal emitted in case of selectionFlags() & PointSelection.
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59 | \param pos Selected point
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60 | */
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61 | void selected(const QwtDoublePoint &pos);
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62 |
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63 | /*!
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64 | A signal emitted in case of selectionFlags() & RectSelection.
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65 | \param rect Selected rectangle
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66 | */
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67 | void selected(const QwtDoubleRect &rect);
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68 |
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69 | /*!
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70 | A signal emitting the selected points,
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71 | at the end of a selection.
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72 |
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73 | \param pa Selected points
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74 | */
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75 | void selected(const QwtArray<QwtDoublePoint> &pa);
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76 |
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77 | /*!
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78 | A signal emitted when a point has been appended to the selection
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79 |
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80 | \param pos Position of the appended point.
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81 | \sa append(). moved()
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82 | */
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83 | void appended(const QwtDoublePoint &pos);
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84 |
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85 | /*!
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86 | A signal emitted whenever the last appended point of the
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87 | selection has been moved.
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88 |
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89 | \param pos Position of the moved last point of the selection.
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90 | \sa move(), appended()
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91 | */
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92 | void moved(const QwtDoublePoint &pos);
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93 |
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94 | protected:
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95 | QwtDoubleRect scaleRect() const;
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96 |
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97 | QwtDoubleRect invTransform(const QRect &) const;
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98 | QRect transform(const QwtDoubleRect &) const;
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99 |
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100 | QwtDoublePoint invTransform(const QPoint &) const;
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101 | QPoint transform(const QwtDoublePoint &) const;
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102 |
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103 | virtual QwtText trackerText(const QPoint &) const;
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104 | virtual QwtText trackerText(const QwtDoublePoint &) const;
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105 |
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106 | virtual void move(const QPoint &);
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107 | virtual void append(const QPoint &);
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108 | virtual bool end(bool ok = true);
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109 |
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110 | private:
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111 | int d_xAxis;
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112 | int d_yAxis;
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113 | };
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114 |
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115 | #endif
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