67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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* Qwt Widget Library
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* Copyright (C) 1997 Josef Wilgen
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* Copyright (C) 2002 Uwe Rathmann
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the Qwt License, Version 1.0
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*****************************************************************************/
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#ifndef QWT_ROUND_SCALE_DRAW_H
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#define QWT_ROUND_SCALE_DRAW_H
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#include "qwt_global.h"
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#include "qwt_abstract_scale_draw.h"
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#include <qpoint.h>
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/*!
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\brief A class for drawing round scales
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QwtRoundScaleDraw can be used to draw round scales.
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The circle segment can be adjusted by setAngleRange().
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The geometry of the scale can be specified with
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moveCenter() and setRadius().
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After a scale division has been specified as a QwtScaleDiv object
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using QwtAbstractScaleDraw::setScaleDiv(const QwtScaleDiv &s),
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the scale can be drawn with the QwtAbstractScaleDraw::draw() member.
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*/
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class QWT_EXPORT QwtRoundScaleDraw: public QwtAbstractScaleDraw
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{
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public:
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QwtRoundScaleDraw();
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virtual ~QwtRoundScaleDraw();
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void setRadius( double radius );
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double radius() const;
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void moveCenter( double x, double y );
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void moveCenter( const QPointF & );
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QPointF center() const;
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void setAngleRange( double angle1, double angle2 );
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virtual double extent( const QFont & ) const;
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protected:
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virtual void drawTick( QPainter *, double value, double len ) const;
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virtual void drawBackbone( QPainter * ) const;
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virtual void drawLabel( QPainter *, double val ) const;
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private:
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QwtRoundScaleDraw( const QwtRoundScaleDraw & );
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QwtRoundScaleDraw &operator=( const QwtRoundScaleDraw &other );
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class PrivateData;
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PrivateData *d_data;
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};
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//! Move the center of the scale draw, leaving the radius unchanged
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inline void QwtRoundScaleDraw::moveCenter( double x, double y )
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{
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moveCenter( QPointF( x, y ) );
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}
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#endif
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