QwtDialNeedle Class Reference

#include <qwt_dial_needle.h>

Inherited by QwtCompassMagnetNeedle, QwtCompassWindArrow, and QwtDialSimpleNeedle.

List of all members.

Public Member Functions
virtual void	draw (QPainter *painter, const QPointF &center, double length, double direction, QPalette::ColorGroup=QPalette::Active) const
const QPalette &	palette () const
	QwtDialNeedle ()
virtual void	setPalette (const QPalette &)
virtual	~QwtDialNeedle ()
Protected Member Functions
virtual void	drawKnob (QPainter *, double width, const QBrush &, bool sunken) const
virtual void	drawNeedle (QPainter *painter, double length, QPalette::ColorGroup colorGroup) const =0

---

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

void QwtDialNeedle::draw	(	QPainter *	painter,
		const QPointF &	center,
		double	length,
		double	direction,
		QPalette::ColorGroup	colorGroup = QPalette::Active
	)		const [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
colorGroup	Color group, used for painting

void QwtDialNeedle::drawKnob	(	QPainter *	painter,
		double	width,
		const QBrush &	brush,
		bool	sunken
	)		const [protected, virtual]

Draw the knob.

virtual void QwtDialNeedle::drawNeedle	(	QPainter *	painter,
		double	length,
		QPalette::ColorGroup	colorGroup
	)		const [protected, pure virtual]

Draw the needle.

The origin of the needle is at position (0.0, 0.0 ) pointing in direction 0.0 ( = east ).

The painter is already initilaized with translation and rotation.

Parameters:

painter	Painter
length	Length of the needle
colorGroup	Color group, used for painting

See also:

setPalette(), palette()

Implemented in QwtCompassWindArrow, QwtCompassMagnetNeedle, and QwtDialSimpleNeedle.

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