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QwtDialNeedle Class Reference

Inheritance diagram for QwtDialNeedle:

QwtCompassMagnetNeedle QwtCompassWindArrow QwtDialSimpleNeedle List of all members.

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


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.

QwtDialNeedle::~QwtDialNeedle  )  [virtual]
 

Destructor.


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.

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.

const QPalette & QwtDialNeedle::palette  )  const
 

Return the palette of the needle.

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

Sets the palette for the needle.

Parameters:
palette New Palette


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