QwtDialNeedle Class Reference

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

#include <qwt_dial_needle.h>

Inheritance diagram for QwtDialNeedle:

Public Member Functions
	QwtDialNeedle ()
	Constructor.
virtual	~QwtDialNeedle ()
	Destructor.
virtual void	setPalette (const QPalette &)
	Set the palette for the needle.
const QPalette &	palette () const
	Return the palette of the needle.
void	setFlatStyle (bool)
	Set flat style.
bool	flatStyle () const
	Return flat style.
virtual void	draw (QPainter *, const QPointF &center, double length, double direction, QPalette::ColorGroup=QPalette::Active) const
	Draw the needle.

Protected Member Functions
virtual void	drawNeedle (QPainter *painter, double length, QPalette::ColorGroup colorGroup) const =0
	Draw the needle.
virtual void	drawKnob (QPainter *, double width, const QBrush &, bool sunken) const
	Draw the knob.

Protected Attributes
QPalette	m_palette
bool	m_flatStyle

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.

See also

QwtDial, QwtCompass

Member Function Documentation

draw()

void QwtDialNeedle::draw ( QPainter *  painter, const QPointF &  center, double  length, double  direction, QPalette::ColorGroup  colorGroup = QPalette::Active  ) const

virtual

Draw the needle.

Parameters

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

drawNeedle()

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

protectedpure 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 initialized with translation and rotation.

Parameters

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

See also

setPalette(), palette()

Implemented in QwtDialSimpleNeedle, QwtCompassMagnetNeedle, and QwtCompassWindArrow.

flatStyle()

bool QwtDialNeedle::flatStyle

(

)

const

Return flat style.

Return whether flat style is enabled.

See also

setFlatStyle()

palette()

const QPalette & QwtDialNeedle::palette

(

)

const

Return the palette of the needle.

Returns

Palette of the needle

setFlatStyle()

void QwtDialNeedle::setFlatStyle

(

bool

on

)

Set flat style.

When enabled (default), needles and knobs are drawn with flat colors instead of 3D shaded effects (Light/Dark gradients).

Parameters

on	true for flat style, false for classic 3D style

See also

flatStyle()

setPalette()

void QwtDialNeedle::setPalette ( const QPalette &  palette )

virtual

Set the palette for the needle.

Sets the palette for the needle.

Parameters

[in]

palette

New Palette

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The documentation for this class was generated from the following files:

• /home/runner/work/QWT/QWT/src/plot/qwt_dial_needle.h
• /home/runner/work/QWT/QWT/src/plot/qwt_dial_needle.cpp