QwtDialNeedle (3)

#include <qwt_dial_needle.h>

Inherited by QwtCompassMagnetNeedle, QwtCompassWindArrow, and QwtDialSimpleNeedle.

Public Member Functions

QwtDialNeedle ()

virtual ~QwtDialNeedle ()

virtual void draw (QPainter *painter, const QPoint ¢er, int length, double direction, QPalette::ColorGroup cg=QPalette::Active) const =0

const QPalette & palette () const

virtual void setPalette (const QPalette &)

Static Protected Member Functions

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

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

virtual void QwtDialNeedle::draw (QPainter *painter, const QPoint ¢er, intlength, doubledirection, QPalette::ColorGroupcg = \fCQPalette::Active\fP) const\fC [pure virtual]\fP

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 QwtCompassWindArrow, QwtCompassMagnetNeedle, and QwtDialSimpleNeedle.

const QPalette & QwtDialNeedle::palette () const

Returns:

the palette of the needle.

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

Sets the palette for the needle.

Parameters:

palette New Palette

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