Qwt User's Guide  6.1.3
QwtSimpleCompassRose Class Reference

A simple rose for QwtCompass. More...

#include <qwt_compass_rose.h>

Inheritance diagram for QwtSimpleCompassRose:

Public Member Functions

 QwtSimpleCompassRose (int numThorns=8, int numThornLevels=-1)
 
virtual ~QwtSimpleCompassRose ()
 Destructor.
 
void setWidth (double w)
 
double width () const
 
void setNumThorns (int count)
 
int numThorns () const
 
void setNumThornLevels (int count)
 
int numThornLevels () const
 
void setShrinkFactor (double factor)
 
double shrinkFactor () const
 
virtual void draw (QPainter *, const QPointF &center, double radius, double north, QPalette::ColorGroup=QPalette::Active) const
 
- Public Member Functions inherited from QwtCompassRose
virtual ~QwtCompassRose ()
 Destructor.
 
virtual void setPalette (const QPalette &p)
 Assign a palette.
 
const QPalette & palette () const
 

Static Public Member Functions

static void drawRose (QPainter *, const QPalette &, const QPointF &center, double radius, double origin, double width, int numThorns, int numThornLevels, double shrinkFactor)
 

Detailed Description

A simple rose for QwtCompass.

Constructor & Destructor Documentation

QwtSimpleCompassRose::QwtSimpleCompassRose ( int  numThorns = 8,
int  numThornLevels = -1 
)

Constructor

Parameters
numThornsNumber of thorns
numThornLevelsNumber of thorn levels

Member Function Documentation

void QwtSimpleCompassRose::draw ( QPainter *  painter,
const QPointF &  center,
double  radius,
double  north,
QPalette::ColorGroup  cg = QPalette::Active 
) const
virtual

Draw the rose

Parameters
painterPainter
centerCenter point
radiusRadius of the rose
northPosition
cgColor group

Implements QwtCompassRose.

void QwtSimpleCompassRose::drawRose ( QPainter *  painter,
const QPalette &  palette,
const QPointF &  center,
double  radius,
double  north,
double  width,
int  numThorns,
int  numThornLevels,
double  shrinkFactor 
)
static

Draw the rose

Parameters
painterPainter
palettePalette
centerCenter of the rose
radiusRadius of the rose
northPosition pointing to north
widthWidth of the rose
numThornsNumber of thorns
numThornLevelsNumber of thorn levels
shrinkFactorFactor to shrink the thorns with each level
int QwtSimpleCompassRose::numThornLevels ( ) const
Returns
Number of thorn levels
See also
setNumThorns(), setNumThornLevels()
int QwtSimpleCompassRose::numThorns ( ) const
Returns
Number of thorns
See also
setNumThorns(), setNumThornLevels()
void QwtSimpleCompassRose::setNumThornLevels ( int  numThornLevels)

Set the of thorns levels

Parameters
numThornLevelsNumber of thorns levels
See also
setNumThorns(), numThornLevels()
void QwtSimpleCompassRose::setNumThorns ( int  numThorns)

Set the number of thorns on one level The number is aligned to a multiple of 4, with a minimum of 4

Parameters
numThornsNumber of thorns
See also
numThorns(), setNumThornLevels()
void QwtSimpleCompassRose::setShrinkFactor ( double  factor)

Set the Factor how to shrink the thorns with each level The default value is 0.9.

Parameters
factorShrink factor
See also
shrinkFactor()
void QwtSimpleCompassRose::setWidth ( double  width)

Set the width of the rose heads. Lower value make thinner heads. The range is limited from 0.03 to 0.4.

Parameters
widthWidth
double QwtSimpleCompassRose::shrinkFactor ( ) const
Returns
Factor how to shrink the thorns with each level
See also
setShrinkFactor()
double QwtSimpleCompassRose::width ( ) const
Returns
Width of the rose
See also
setWidth()