QwtCompassMagnetNeedle (3) Linux Manual Page

QwtCompassMagnetNeedle –

A magnet needle for compass widgets.

Synopsis

#include <qwt_dial_needle.h>

Inherits QwtDialNeedle.

Public Types

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

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

enum QwtCompassMagnetNeedle::Style

Style of the needle.

Enumerator

TriangleStyle

A needle with a triangular shape.

ThinStyle

A thin needle.

Member Function Documentation

void QwtCompassMagnetNeedle::drawNeedle (QPainter *painter, doublelength, QPalette::ColorGroupcolorGroup) const [protected], [virtual]

Draw the needle

Parameters:

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

Implements QwtDialNeedle.

Author

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