Qwt User's Guide  6.1-rc3
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qwt_knob.h
1 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
2  * Qwt Widget Library
3  * Copyright (C) 1997 Josef Wilgen
4  * Copyright (C) 2002 Uwe Rathmann
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the Qwt License, Version 1.0
8  *****************************************************************************/
9 
10 #ifndef QWT_KNOB_H
11 #define QWT_KNOB_H
12 
13 #include "qwt_global.h"
14 #include "qwt_abstract_slider.h"
15 
16 class QwtRoundScaleDraw;
17 
42 class QWT_EXPORT QwtKnob: public QwtAbstractSlider
43 {
44  Q_OBJECT
45 
46  Q_ENUMS ( KnobStyle MarkerStyle )
47 
48  Q_PROPERTY( KnobStyle knobStyle READ knobStyle WRITE setKnobStyle )
49  Q_PROPERTY( int knobWidth READ knobWidth WRITE setKnobWidth )
50  Q_PROPERTY( Qt::Alignment alignment READ alignment WRITE setAlignment )
51  Q_PROPERTY( double totalAngle READ totalAngle WRITE setTotalAngle )
52  Q_PROPERTY( int numTurns READ numTurns WRITE setNumTurns )
53  Q_PROPERTY( MarkerStyle markerStyle READ markerStyle WRITE setMarkerStyle )
54  Q_PROPERTY( int markerSize READ markerSize WRITE setMarkerSize )
55  Q_PROPERTY( int borderWidth READ borderWidth WRITE setBorderWidth )
56 
57 public:
66  enum KnobStyle
67  {
70 
73 
78  Sunken
79  };
80 
89  enum MarkerStyle
90  {
92  NoMarker = -1,
93 
95  Tick,
96 
99 
101  Dot,
102 
107  Nub,
108 
113  Notch
114  };
115 
116  explicit QwtKnob( QWidget* parent = NULL );
117  virtual ~QwtKnob();
118 
119  void setAlignment( Qt::Alignment );
120  Qt::Alignment alignment() const;
121 
122  void setKnobWidth( int );
123  int knobWidth() const;
124 
125  void setNumTurns( int );
126  int numTurns() const;
127 
128  void setTotalAngle ( double angle );
129  double totalAngle() const;
130 
131  void setKnobStyle( KnobStyle );
132  KnobStyle knobStyle() const;
133 
134  void setBorderWidth( int bw );
135  int borderWidth() const;
136 
137  void setMarkerStyle( MarkerStyle );
138  MarkerStyle markerStyle() const;
139 
140  void setMarkerSize( int );
141  int markerSize() const;
142 
143  virtual QSize sizeHint() const;
144  virtual QSize minimumSizeHint() const;
145 
146  void setScaleDraw( QwtRoundScaleDraw * );
147 
148  const QwtRoundScaleDraw *scaleDraw() const;
149  QwtRoundScaleDraw *scaleDraw();
150 
151  QRect knobRect() const;
152 
153 protected:
154  virtual void paintEvent( QPaintEvent * );
155  virtual void changeEvent( QEvent * );
156 
157  virtual void drawKnob( QPainter *, const QRectF & ) const;
158 
159  virtual void drawFocusIndicator( QPainter * ) const;
160 
161  virtual void drawMarker( QPainter *,
162  const QRectF &, double arc ) const;
163 
164  virtual double scrolledTo( const QPoint & ) const;
165  virtual bool isScrollPosition( const QPoint & ) const;
166 
167 private:
168  class PrivateData;
169  PrivateData *d_data;
170 };
171 
172 #endif