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