Qwt User's Guide  6.1.0
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QwtCompassMagnetNeedle Class Reference

A magnet needle for compass widgets. More...

#include <qwt_dial_needle.h>

Inheritance diagram for QwtCompassMagnetNeedle:
Inheritance graph
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Public Types

enum  Style { TriangleStyle, ThinStyle }
 Style of the needle. More...
 

Public Member Functions

 QwtCompassMagnetNeedle (Style=TriangleStyle, const QColor &light=Qt::white, const QColor &dark=Qt::red)
 Constructor.
 
- Public Member Functions inherited from QwtDialNeedle
 QwtDialNeedle ()
 Constructor.
 
virtual ~QwtDialNeedle ()
 Destructor.
 
virtual void setPalette (const QPalette &)
 
const QPalette & palette () const
 
virtual void draw (QPainter *painter, const QPointF &center, double length, double direction, QPalette::ColorGroup=QPalette::Active) const
 

Protected Member Functions

virtual void drawNeedle (QPainter *, double length, QPalette::ColorGroup) const
 
- Protected Member Functions inherited from QwtDialNeedle
virtual void drawKnob (QPainter *, double width, const QBrush &, bool sunken) const
 Draw the knob.
 

Detailed Description

A magnet needle for compass widgets.

A magnet needle points to two opposite directions indicating north and south.

The following colors are used:

See Also
QwtDial, QwtCompass

Member Enumeration Documentation

Style of the needle.

Enumerator
TriangleStyle 

A needle with a triangular shape.

ThinStyle 

A thin needle.

Member Function Documentation

void QwtCompassMagnetNeedle::drawNeedle ( QPainter *  painter,
double  length,
QPalette::ColorGroup  colorGroup 
) const
protectedvirtual

Draw the needle

Parameters
painterPainter
lengthLength of the needle
colorGroupColor group, used for painting

Implements QwtDialNeedle.