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100 lines
2.8 KiB
100 lines
2.8 KiB
/* -*- 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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Q_OBJECT |
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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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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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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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