Qwt User's Guide
QwtCompassMagnetNeedle Class Reference

A magnet needle for compass widgets. More...

#include <qwt_dial_needle.h>

Inheritance diagram for QwtCompassMagnetNeedle:

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.

Protected Member Functions

virtual void drawNeedle (QPainter *, double length, QPalette::ColorGroup) 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:

  • QPalette::Light
    Used for pointing south
  • QPalette::Dark
    Used for pointing north
  • QPalette::Base
    Knob (ThinStyle only)
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 [protected, virtual]

Draw the needle

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

Implements QwtDialNeedle.

List of all members.

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