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_ROUND_SCALE_DRAW_H
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11 | #define QWT_ROUND_SCALE_DRAW_H
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12 |
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13 | #include <qpoint.h>
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14 | #include "qwt_global.h"
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15 | #include "qwt_abstract_scale_draw.h"
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16 |
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17 | class QPen;
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18 |
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19 | /*!
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20 | \brief A class for drawing round scales
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21 |
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22 | QwtRoundScaleDraw can be used to draw round scales.
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23 | The circle segment can be adjusted by QwtRoundScaleDraw::setAngleRange().
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24 | The geometry of the scale can be specified with
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25 | QwtRoundScaleDraw::moveCenter() and QwtRoundScaleDraw::setRadius().
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26 |
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27 | After a scale division has been specified as a QwtScaleDiv object
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28 | using QwtAbstractScaleDraw::setScaleDiv(const QwtScaleDiv &s),
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29 | the scale can be drawn with the QwtAbstractScaleDraw::draw() member.
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30 | */
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31 |
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32 | class QWT_EXPORT QwtRoundScaleDraw: public QwtAbstractScaleDraw
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33 | {
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34 | public:
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35 | QwtRoundScaleDraw();
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36 | QwtRoundScaleDraw(const QwtRoundScaleDraw &);
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37 |
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38 | virtual ~QwtRoundScaleDraw();
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39 |
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40 | QwtRoundScaleDraw &operator=(const QwtRoundScaleDraw &other);
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41 |
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42 | void setRadius(int radius);
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43 | int radius() const;
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44 |
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45 | void moveCenter(int x, int y);
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46 | void moveCenter(const QPoint &);
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47 | QPoint center() const;
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48 |
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49 | void setAngleRange(double angle1, double angle2);
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50 |
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51 | virtual int extent(const QPen &, const QFont &) const;
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52 |
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53 | protected:
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54 | virtual void drawTick(QPainter *p, double val, int len) const;
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55 | virtual void drawBackbone(QPainter *p) const;
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56 | virtual void drawLabel(QPainter *p, double val) const;
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57 |
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58 | private:
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59 | class PrivateData;
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60 | PrivateData *d_data;
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61 | };
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62 |
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63 | //! Move the center of the scale draw, leaving the radius unchanged
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64 | inline void QwtRoundScaleDraw::moveCenter(int x, int y)
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65 | {
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66 | moveCenter(QPoint(x, y));
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67 | }
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68 |
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69 | #endif
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