SYNOPSIS

#include <qwt_dial_needle.h>

Inherits QwtDialNeedle.

Public Types

enum Style { TriangleStyle, ThinStyle }

Public Member Functions

virtual void draw (QPainter *, const QPoint &, int length, double direction, QPalette::ColorGroup=QPalette::Active) const

const QPalette & palette () const

QwtCompassMagnetNeedle (Style=TriangleStyle, const QColor &light=Qt::white, const QColor &dark=Qt::red)

virtual void setPalette (const QPalette &)

Static Public Member Functions

static void drawThinNeedle (QPainter *, const QPalette &, QPalette::ColorGroup, const QPoint &, int length, double direction)

static void drawTriangleNeedle (QPainter *, const QPalette &, QPalette::ColorGroup, const QPoint &, int length, double direction)

Static Protected Member Functions

static void drawKnob (QPainter *, const QPoint &pos, int width, const QBrush &, bool sunken)

static void drawPointer (QPainter *painter, const QBrush &brush, int colorOffset, const QPoint &center, int length, int width, double direction)

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:

• QColorGroup::Light
  
   Used for pointing south
• QColorGroup::Dark
  
   Used for pointing north
• QColorGroup::Base
  
   Knob (ThinStyle only)

See also:

QwtDial, QwtCompass

Member Enumeration Documentation

enum QwtCompassMagnetNeedle::Style

Style of the needle.

Constructor & Destructor Documentation

QwtCompassMagnetNeedle::QwtCompassMagnetNeedle (Stylestyle = TriangleStyle, const QColor &light = Qt::white, const QColor &dark = Qt::red)

Constructor.

Member Function Documentation

void QwtCompassMagnetNeedle::draw (QPainter *painter, const QPoint &center, intlength, doubledirection, QPalette::ColorGroupcolorGroup = QPalette::Active) const [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
colorGroup Color group, used for painting

Implements QwtDialNeedle.

void QwtDialNeedle::drawKnob (QPainter *painter, const QPoint &pos, intwidth, const QBrush &brush, boolsunken) [static, protected, inherited]

Draw the knob.

void QwtCompassMagnetNeedle::drawPointer (QPainter *painter, const QBrush &brush, intcolorOffset, const QPoint &center, intlength, intwidth, doubledirection) [static, protected]Draw a compass needle

Parameters:

painter Painter
brush Brush
colorOffset Color offset
center Center, where the needle starts
length Length of the needle
width Width of the needle
direction Direction

void QwtCompassMagnetNeedle::drawThinNeedle (QPainter *painter, const QPalette &palette, QPalette::ColorGroupcolorGroup, const QPoint &center, intlength, doubledirection) [static]Draw a compass needle

Parameters:

painter Painter
palette Palette
colorGroup Color group
center Center, where the needle starts
length Length of the needle
direction Direction

void QwtCompassMagnetNeedle::drawTriangleNeedle (QPainter *painter, const QPalette &palette, QPalette::ColorGroupcolorGroup, const QPoint &center, intlength, doubledirection) [static]Draw a compass needle

Parameters:

painter Painter
palette Palette
colorGroup Color group
center Center, where the needle starts
length Length of the needle
direction Direction

const QPalette & QwtDialNeedle::palette () const [inherited]Returns:

the palette of the needle.

void QwtDialNeedle::setPalette (const QPalette &palette) [virtual, inherited]Sets the palette for the needle.

Parameters:

palette New Palette

Author

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