QwtDialNeedle(3)

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

SYNOPSIS

#include <qwt_dial_needle.h>

Inherited by QwtCompassMagnetNeedle, QwtCompassWindArrow, and QwtDialSimpleNeedle.

  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

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

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

Constructor & Destructor Documentation

  QwtDialNeedle::QwtDialNeedle ()

Constructor.

  QwtDialNeedle::~QwtDialNeedle () [virtual]

Destructor.

Member Function Documentation

  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.

  void QwtDialNeedle::drawKnob (QPainter * painter, const QPoint & pos, int width, const QBrush & brush, bool sunken) [static, protected]

Draw the knob.

  const QPalette & QwtDialNeedle::palette () const

Returns:
    the palette of the needle.

  void QwtDialNeedle::setPalette (const QPalette & palette) [virtual]

Sets the palette for the needle.

Parameters:
    palette New Palette

Author

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