106 lines
2.8 KiB
C
106 lines
2.8 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_ABSTRACT_SCALE_H
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#define QWT_ABSTRACT_SCALE_H
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#include "qwt_global.h"
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#include <qwidget.h>
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class QwtScaleEngine;
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class QwtAbstractScaleDraw;
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class QwtScaleDiv;
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class QwtScaleMap;
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class QwtInterval;
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/*!
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\brief An abstract base class for widgets having a scale
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The scale of an QwtAbstractScale is determined by a QwtScaleDiv
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definition, that contains the boundaries and the ticks of the scale.
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The scale is painted using a QwtScaleDraw object.
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The scale division might be assigned explicitly - but usually
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it is calculated from the boundaries using a QwtScaleEngine.
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The scale engine also decides the type of transformation of the scale
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( linear, logarithmic ... ).
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*/
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class QWT_EXPORT QwtAbstractScale: public QWidget
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{
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Q_OBJECT
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Q_PROPERTY( double lowerBound READ lowerBound WRITE setLowerBound )
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Q_PROPERTY( double upperBound READ upperBound WRITE setUpperBound )
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Q_PROPERTY( int scaleMaxMajor READ scaleMaxMajor WRITE setScaleMaxMajor )
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Q_PROPERTY( int scaleMaxMinor READ scaleMaxMinor WRITE setScaleMaxMinor )
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Q_PROPERTY( double scaleStepSize READ scaleStepSize WRITE setScaleStepSize )
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public:
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QwtAbstractScale( QWidget *parent = NULL );
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virtual ~QwtAbstractScale();
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void setScale( double lowerBound, double upperBound );
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void setScale( const QwtInterval & );
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void setScale( const QwtScaleDiv & );
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const QwtScaleDiv& scaleDiv() const;
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void setLowerBound( double value );
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double lowerBound() const;
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void setUpperBound( double value );
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double upperBound() const;
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void setScaleStepSize( double stepSize );
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double scaleStepSize() const;
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void setScaleMaxMajor( int ticks );
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int scaleMaxMinor() const;
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void setScaleMaxMinor( int ticks );
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int scaleMaxMajor() const;
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void setScaleEngine( QwtScaleEngine * );
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const QwtScaleEngine *scaleEngine() const;
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QwtScaleEngine *scaleEngine();
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int transform( double ) const;
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double invTransform( int ) const;
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bool isInverted() const;
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double minimum() const;
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double maximum() const;
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const QwtScaleMap &scaleMap() const;
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protected:
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void rescale( double lowerBound,
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double upperBound, double stepSize );
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void setAbstractScaleDraw( QwtAbstractScaleDraw * );
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const QwtAbstractScaleDraw *abstractScaleDraw() const;
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QwtAbstractScaleDraw *abstractScaleDraw();
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virtual void scaleChange();
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private:
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void updateScaleDraw();
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class PrivateData;
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PrivateData *d_data;
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};
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#endif
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