# QwtSimpleCompassRose Class Reference

A simple rose for QwtCompass. More...

`#include <qwt_compass_rose.h>`

Inheritance diagram for QwtSimpleCompassRose:

[legend]

List of all members.

## Public Member Functions
| QwtSimpleCompassRose (int numThorns=8, int numThornLevels=-1)
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 QPoint &center, int radius, double north, QPalette::ColorGroup=QPalette::Active) const
## Static Public Member Functions
static void | drawRose (QPainter *, const QPalette &, const QPoint &center, int 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:

  | numThorns | Number of thorns
  | numThornLevels | Number of thorn levels

## Member Function Documentation

void QwtSimpleCompassRose::draw | ( | QPainter * | painter,
|  | const QPoint & | center,
|  | int | radius,
|  | double | north,
|  | QPalette::ColorGroup | cg = `QPalette::Active` |
| ) |  |  | const`[virtual]`

Draw the rose

Parameters:

  | painter | Painter
  | center | Center point
  | radius | Radius of the rose
  | north | Position
  | cg | Color group

Implements QwtCompassRose.

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

Draw the rose

Parameters:

  | painter | Painter
  | palette | Palette
  | center | Center of the rose
  | radius | Radius of the rose
  | north | Position pointing to north
  | width | Width of the rose
  | numThorns | Number of thorns
  | numThornLevels | Number of thorn levels
  | shrinkFactor | Factor 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:

  | numThornLevels | Number 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:

  | numThorns | Number of thorns

See also:
  numThorns(), setNumThornLevels()

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:

  | width | Width

double QwtSimpleCompassRose::width | ( |  | ) | const`[inline]`

See also:
  setWidth()