Qwt User's Guide 5.2.2
Public Types | Public Member Functions | Static Public Member Functions | Static Protected Member Functions

QwtCompassMagnetNeedle Class Reference

A magnet needle for compass widgets. More...

#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

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:

See also:
QwtDial, QwtCompass

Member Enumeration Documentation

Style of the needle.


Constructor & Destructor Documentation

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

Constructor.


Member Function Documentation

void QwtCompassMagnetNeedle::draw ( QPainter *  painter,
const QPoint &  center,
int  length,
double  direction,
QPalette::ColorGroup  colorGroup = QPalette::Active 
) const [virtual]

Draw the needle

Parameters:
painterPainter
centerCenter of the dial, start position for the needle
lengthLength of the needle
directionDirection of the needle, in degrees counter clockwise
colorGroupColor group, used for painting

Implements QwtDialNeedle.

void QwtDialNeedle::drawKnob ( QPainter *  painter,
const QPoint &  pos,
int  width,
const QBrush &  brush,
bool  sunken 
) [static, protected, inherited]

Draw the knob.

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

Draw a compass needle

Parameters:
painterPainter
brushBrush
colorOffsetColor offset
centerCenter, where the needle starts
lengthLength of the needle
widthWidth of the needle
directionDirection
void QwtCompassMagnetNeedle::drawThinNeedle ( QPainter *  painter,
const QPalette &  palette,
QPalette::ColorGroup  colorGroup,
const QPoint &  center,
int  length,
double  direction 
) [static]

Draw a compass needle

Parameters:
painterPainter
palettePalette
colorGroupColor group
centerCenter, where the needle starts
lengthLength of the needle
directionDirection
void QwtCompassMagnetNeedle::drawTriangleNeedle ( QPainter *  painter,
const QPalette &  palette,
QPalette::ColorGroup  colorGroup,
const QPoint &  center,
int  length,
double  direction 
) [static]

Draw a compass needle

Parameters:
painterPainter
palettePalette
colorGroupColor group
centerCenter, where the needle starts
lengthLength of the needle
directionDirection
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:
paletteNew Palette