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NAME

       QwtDialNeedle -

SYNOPSIS

       Inherited by QwtCompassMagnetNeedle, QwtCompassWindArrow, and
       QwtDialSimpleNeedle.

Detailed Description

       Base class for needles that can be used in a QwtDial.

       QwtDialNeedle is a pointer that indicates a value by pointing to a
       specific direction.

       Qwt is missing a set of good looking needles. Contributions are very
       welcome.

       See also:
           QwtDial, QwtCompass

       Definition at line 31 of file qwt_dial_needle.h.

   Public Member Functions
       QwtDialNeedle ()
       virtual ~QwtDialNeedle ()
       virtual void draw (QPainter *painter, const QPoint &center, int length,
           double direction, QPalette::ColorGroup cg=QPalette::Active) const
           =0
       virtual void setPalette (const QPalette &)
       const QPalette & palette () const

   Protected Member Functions
       const QColorGroup & colorGroup (QPalette::ColorGroup) const

   Static Protected Member Functions
       void drawKnob (QPainter *, const QPoint &pos, int width, const QBrush
           &, bool sunken)

Constructor & Destructor Documentation

   QwtDialNeedle::QwtDialNeedle ()
       Constructor.

       Definition at line 18 of file qwt_dial_needle.cpp.

   QwtDialNeedle::~QwtDialNeedle () [virtual]
       Destructor.

       Definition at line 24 of file qwt_dial_needle.cpp.

Member Function Documentation

   const QColorGroup & QwtDialNeedle::colorGroup (QPalette::ColorGroup cg)
       const [protected]
       Parameters:
           cg Identifier of the color group

       Returns:
           The color group of the palette.

       Definition at line 85 of file qwt_dial_needle.cpp.

       Referenced by QwtCompassWindArrow::draw(),
       QwtCompassMagnetNeedle::draw(), and QwtDialSimpleNeedle::draw().

   virtual void QwtDialNeedle::draw (QPainter * painter, const QPoint &
       center, int length, double direction, QPalette::ColorGroup cg =
       QPalette::Active) const [pure virtual]
       Draw the needle

       Parameters:
           painter Painter
           center Center of the dial, start position for the needle
           length Length of the needle
           direction Direction of the needle, in degrees counter clockwise
           cg Color group, used for painting

       Implemented in QwtDialSimpleNeedle, QwtCompassMagnetNeedle, and
       QwtCompassWindArrow.

       Referenced by QwtAnalogClock::drawHand(), and QwtDial::drawNeedle().

   void QwtDialNeedle::drawKnob (QPainter *, const QPoint & pos, int width,
       const QBrush &, bool sunken) [static, protected]
       Draw the knob.

       Definition at line 47 of file qwt_dial_needle.cpp.

       Referenced by QwtDialSimpleNeedle::drawArrowNeedle(),
       QwtDialSimpleNeedle::drawRayNeedle(), and
       QwtCompassMagnetNeedle::drawThinNeedle().

   const QPalette & QwtDialNeedle::palette () const
       Returns:
           the palette of the needle.

       Definition at line 41 of file qwt_dial_needle.cpp.

   void QwtDialNeedle::setPalette (const QPalette & palette) [virtual]
       Sets the palette for the needle.

       Parameters:
           palette New Palette

       Definition at line 33 of file qwt_dial_needle.cpp.

       Referenced by QwtCompassMagnetNeedle::QwtCompassMagnetNeedle(),
       QwtCompassWindArrow::QwtCompassWindArrow(), and
       QwtDialSimpleNeedle::QwtDialSimpleNeedle().

Author

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       code.