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 | #ifndef QWT_PLOT_SCALE_ITEM_H
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11 | #define QWT_PLOT_SCALE_ITEM_H
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12 |
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13 | #include "qwt_global.h"
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14 | #include "qwt_plot_item.h"
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15 | #include "qwt_scale_draw.h"
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16 |
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17 | #if QT_VERSION < 0x040000
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18 | class QColorGroup;
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19 | #else
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20 | class QPalette;
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21 | #endif
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22 |
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23 | /*!
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24 | \brief A class which draws a scale inside the plot canvas
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25 |
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26 | QwtPlotScaleItem can be used to draw an axis inside the plot canvas.
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27 | It might by synchronized to one of the axis of the plot, but can
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28 | also display its own ticks and labels.
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29 |
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30 | It is allowed to synchronize the scale item with a disabled axis.
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31 | In plots with vertical and horizontal scale items, it might be
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32 | necessary to remove ticks at the intersections, by overloading
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33 | updateScaleDiv().
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34 |
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35 | The scale might be at a specific position (f.e 0.0) or it might be
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36 | aligned to a canvas border.
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37 |
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38 | \par Example
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39 | The following example shows how to replace the left axis, by a scale item
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40 | at the x position 0.0.
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41 | \verbatim
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42 | QwtPlotScaleItem *scaleItem =
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43 | new QwtPlotScaleItem(QwtScaleDraw::RightScale, 0.0);
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44 | scaleItem->setFont(plot->axisWidget(QwtPlot::yLeft)->font());
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45 | scaleItem->attach(plot);
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46 |
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47 | plot->enableAxis(QwtPlot::yLeft, false);
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48 | \endverbatim
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49 | */
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50 |
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51 | class QWT_EXPORT QwtPlotScaleItem: public QwtPlotItem
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52 | {
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53 | public:
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54 | explicit QwtPlotScaleItem(
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55 | QwtScaleDraw::Alignment = QwtScaleDraw::BottomScale,
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56 | const double pos = 0.0);
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57 | virtual ~QwtPlotScaleItem();
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58 |
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59 | virtual int rtti() const;
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60 |
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61 | void setScaleDiv(const QwtScaleDiv& );
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62 | const QwtScaleDiv& scaleDiv() const;
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63 |
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64 | void setScaleDivFromAxis(bool on);
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65 | bool isScaleDivFromAxis() const;
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66 |
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67 | #if QT_VERSION < 0x040000
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68 | void setColorGroup(const QColorGroup &);
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69 | QColorGroup colorGroup() const;
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70 | #else
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71 | void setPalette(const QPalette &);
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72 | QPalette palette() const;
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73 | #endif
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74 |
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75 | void setFont(const QFont&);
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76 | QFont font() const;
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77 |
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78 | void setScaleDraw(QwtScaleDraw *);
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79 |
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80 | const QwtScaleDraw *scaleDraw() const;
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81 | QwtScaleDraw *scaleDraw();
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82 |
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83 | void setPosition(double pos);
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84 | double position() const;
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85 |
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86 | void setBorderDistance(int numPixels);
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87 | int borderDistance() const;
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88 |
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89 | void setAlignment(QwtScaleDraw::Alignment);
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90 |
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91 | virtual void draw(QPainter *p,
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92 | const QwtScaleMap &xMap, const QwtScaleMap &yMap,
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93 | const QRect &rect) const;
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94 |
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95 | virtual void updateScaleDiv(const QwtScaleDiv&,
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96 | const QwtScaleDiv&);
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97 |
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98 | private:
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99 | void updateBorders();
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100 |
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101 | class PrivateData;
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102 | PrivateData *d_data;
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103 | };
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104 |
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105 | #endif
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