Qwt User's Guide  6.0.2
Public Types | Public Member Functions | Protected Member Functions
QwtCompassMagnetNeedle Class Reference

#include <qwt_dial_needle.h>

Inheritance diagram for QwtCompassMagnetNeedle:
Inheritance graph
[legend]

List of all members.

Public Types

enum  Style {
  TriangleStyle,
  ThinStyle
}

Public Member Functions

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

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

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.