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101 lines
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101 lines
0 B
15 years ago
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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_KNOB_H
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#define QWT_KNOB_H
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#include "qwt_global.h"
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#include "qwt_abstract_slider.h"
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#include "qwt_abstract_scale.h"
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class QwtRoundScaleDraw;
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/*!
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\brief The Knob Widget
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The QwtKnob widget imitates look and behaviour of a volume knob on a radio.
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It contains a scale around the knob which is set up automatically or can
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be configured manually (see QwtAbstractScale).
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Automatic scrolling is enabled when the user presses a mouse
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button on the scale. For a description of signals, slots and other
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members, see QwtAbstractSlider.
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\image html knob.png
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\sa QwtAbstractSlider and QwtAbstractScale for the descriptions
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of the inherited members.
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*/
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class QWT_EXPORT QwtKnob : public QwtAbstractSlider, public QwtAbstractScale
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{
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14 years ago
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Q_OBJECT
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15 years ago
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Q_ENUMS (Symbol)
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Q_PROPERTY( int knobWidth READ knobWidth WRITE setKnobWidth )
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Q_PROPERTY( int borderWidth READ borderWidth WRITE setBorderWidth )
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Q_PROPERTY( double totalAngle READ totalAngle WRITE setTotalAngle )
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Q_PROPERTY( Symbol symbol READ symbol WRITE setSymbol )
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public:
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/*!
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Symbol
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\sa QwtKnob::QwtKnob()
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*/
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enum Symbol { Line, Dot };
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explicit QwtKnob(QWidget* parent = NULL);
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#if QT_VERSION < 0x040000
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explicit QwtKnob(QWidget* parent, const char *name);
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#endif
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virtual ~QwtKnob();
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void setKnobWidth(int w);
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int knobWidth() const;
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void setTotalAngle (double angle);
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double totalAngle() const;
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void setBorderWidth(int bw);
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int borderWidth() const;
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void setSymbol(Symbol);
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Symbol symbol() const;
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virtual QSize sizeHint() const;
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virtual QSize minimumSizeHint() const;
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14 years ago
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void setScaleDraw(QwtRoundScaleDraw *);
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const QwtRoundScaleDraw *scaleDraw() const;
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QwtRoundScaleDraw *scaleDraw();
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protected:
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virtual void paintEvent(QPaintEvent *e);
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virtual void resizeEvent(QResizeEvent *e);
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void draw(QPainter *p, const QRect& ur);
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void drawKnob(QPainter *p, const QRect &r);
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void drawMarker(QPainter *p, double arc, const QColor &c);
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private:
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void initKnob();
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void layoutKnob( bool update = true );
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double getValue(const QPoint &p);
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void getScrollMode( const QPoint &p, int &scrollMode, int &direction );
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void recalcAngle();
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14 years ago
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virtual void valueChange();
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virtual void rangeChange();
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virtual void scaleChange();
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virtual void fontChange(const QFont &oldFont);
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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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