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QwtKnob(3)                     Qwt User's Guide                     QwtKnob(3)

NAME
       QwtKnob -

SYNOPSIS
       #include <qwt_knob.h>

       Inherits QwtAbstractSlider, and QwtAbstractScale.

   Public Types
       enum Symbol { Line, Dot }

   Public Member Functions
       QwtKnob (QWidget *parent=NULL)
       virtual ~QwtKnob ()
       int borderWidth () const
       int knobWidth () const
       virtual QSize minimumSizeHint () const
       const QwtRoundScaleDraw * scaleDraw () const
       QwtRoundScaleDraw * scaleDraw ()
       void setBorderWidth (int bw)
       void setKnobWidth (int w)
       void setScaleDraw (QwtRoundScaleDraw *)
       void setSymbol (Symbol)
       void setTotalAngle (double angle)
       virtual QSize sizeHint () const
       Symbol symbol () const
       double totalAngle () const

   Protected Member Functions
       void draw (QPainter *p, const QRect &ur)
       void drawKnob (QPainter *p, const QRect &r)
       void drawMarker (QPainter *p, double arc, const QColor &c)
       virtual void paintEvent (QPaintEvent *e)
       virtual void resizeEvent (QResizeEvent *e)

   Additional Inherited Members

Detailed Description
       The Knob Widget.

       The QwtKnob widget imitates look and behaviour of a volume knob on a
       radio. It contains a scale around the knob which is set up
       automatically or can be configured manually (see QwtAbstractScale).
       Automatic scrolling is enabled when the user presses a mouse button on
       the scale. For a description of signals, slots and other members, see
       QwtAbstractSlider.

       See also:
           QwtAbstractSlider and QwtAbstractScale for the descriptions of the
           inherited members.

Member Enumeration Documentation
   enum QwtKnob::Symbol
       Symbol

       See also:
           QwtKnob::QwtKnob()

Constructor & Destructor Documentation
   QwtKnob::QwtKnob (QWidget *parent = NULL) [explicit]
       Constructor

       Parameters:
           parent Parent widget

Member Function Documentation
   void QwtKnob::draw (QPainter *painter, const QRect &rect) [protected]
       Repaint the knob

       Parameters:
           painter Painter
           rect Update rectangle

   void QwtKnob::drawKnob (QPainter *painter, const QRect &r) [protected]
       Draw the knob. Parameters:
           painter painter
           r Bounding rectangle of the knob (without scale)

   void QwtKnob::drawMarker (QPainter *p, doublearc, const QColor &c)
       [protected]
       Draw the marker at the knob's front. Parameters:
           p Painter
           arc Angle of the marker
           c Marker color

   QSize QwtKnob::minimumSizeHint () const [virtual]
       Return a minimum size hint. Warning:
           The return value of QwtKnob::minimumSizeHint() depends on the font
           and the scale.

   void QwtKnob::paintEvent (QPaintEvent *e) [protected],  [virtual]
       Repaint the knob

       Parameters:
           e Paint event

   void QwtKnob::resizeEvent (QResizeEvent *e) [protected],  [virtual]
       Qt Resize Event

   const QwtRoundScaleDraw * QwtKnob::scaleDraw () const
       Returns:
           the scale draw of the knob

       See also:
           setScaleDraw()

   QwtRoundScaleDraw * QwtKnob::scaleDraw ()
       Returns:
           the scale draw of the knob

       See also:
           setScaleDraw()

   void QwtKnob::setBorderWidth (intbw)
       Set the knob's border width. Parameters:
           bw new border width

   void QwtKnob::setKnobWidth (intw)
       Change the knob's width. The specified width must be >= 5, or it will
       be clipped.

       Parameters:
           w New width

   void QwtKnob::setScaleDraw (QwtRoundScaleDraw *scaleDraw)
       Change the scale draw of the knob

       For changing the labels of the scales, it is necessary to derive from
       QwtRoundScaleDraw and overload QwtRoundScaleDraw::label().

       See also:
           scaleDraw()

   void QwtKnob::setSymbol (QwtKnob::Symbols)
       Set the symbol of the knob. See also:
           symbol()

   void QwtKnob::setTotalAngle (doubleangle)
       Set the total angle by which the knob can be turned. Parameters:
           angle Angle in degrees.

       The default angle is 270 degrees. It is possible to specify an angle of
       more than 360 degrees so that the knob can be turned several times
       around its axis.

   QSize QwtKnob::sizeHint () const [virtual]
       Returns:
           minimumSizeHint()

   QwtKnob::Symbol QwtKnob::symbol () const
       Returns:
           symbol of the knob

       See also:
           setSymbol()

Author
       Generated automatically by Doxygen for Qwt User's Guide from the source
       code.

Version 5.2.3                   Tue Nov 20 2012                     QwtKnob(3)