QwtSimpleCompassRose Class Reference

A simple rose for QwtCompass. More...

#include <qwt_compass_rose.h>

Inheritance diagram for QwtSimpleCompassRose:

Classes
class	PrivateData

Public Member Functions
	QwtSimpleCompassRose (int numThorns=8, int numThornLevels=-1)
	Constructor.
void	setWidth (double)
	Set the width of the rose heads.
double	width () const
	Get the width of the rose heads.
void	setNumThorns (int)
	Set the number of thorns on one level.
int	numThorns () const
	Get the number of thorns.
void	setNumThornLevels (int)
	Set the number of thorn levels.
int	numThornLevels () const
	Get the number of thorn levels.
void	setShrinkFactor (double factor)
	Set the shrink factor for thorns with each level.
double	shrinkFactor () const
	Get the shrink factor for thorns with each level.
void	setFlatStyle (bool)
	Set flat style.
bool	flatStyle () const
	Return whether flat style is enabled.
virtual void	draw (QPainter *, const QPointF &center, double radius, double north, QPalette::ColorGroup=QPalette::Active) const override
	Draw the rose.
Public Member Functions inherited from QwtCompassRose
	QwtCompassRose ()
	Constructor.
virtual	~QwtCompassRose ()
	Destructor.
virtual void	setPalette (const QPalette &)
	Assign a palette.
const QPalette &	palette () const
	Get the current palette.

Static Public Member Functions
static void	drawRose (QPainter *, const QPalette &, const QPointF &center, double radius, double north, double width, int numThorns, int numThornLevels, double shrinkFactor, bool flatStyle=true)
	Static helper to draw a rose with specified parameters.

Detailed Description

A simple rose for QwtCompass.

QwtSimpleCompassRose provides a simple compass rose implementation with configurable thorn count and levels.

Constructor & Destructor Documentation

QwtSimpleCompassRose()

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

Constructor.

Parameters

[in]	numThorns	Number of thorns
[in]	numThornLevels	Number of thorn levels (-1 means auto)

Destructor

Member Function Documentation

draw()

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

overridevirtual

Draw the rose.

Parameters

[in]	painter	Painter
[in]	center	Center point
[in]	radius	Radius of the rose
[in]	north	Position pointing north
[in]	cg	Color group

Implements QwtCompassRose.

drawRose()

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

static

Static helper to draw a rose with specified parameters.

Parameters

[in]	painter	Painter
[in]	palette	Palette for drawing
[in]	center	Center of the rose
[in]	radius	Radius of the rose
[in]	north	Position pointing to north
[in]	width	Width of the rose heads
[in]	numThorns	Number of thorns
[in]	numThornLevels	Number of thorn levels
[in]	shrinkFactor	Factor to shrink the thorns with each level

flatStyle()

bool QwtSimpleCompassRose::flatStyle

(

)

const

Return whether flat style is enabled.

See also

setFlatStyle()

numThornLevels()

int QwtSimpleCompassRose::numThornLevels

(

)

const

Get the number of thorn levels.

Returns

Number of thorn levels

See also

setNumThorns(), setNumThornLevels()

numThorns()

int QwtSimpleCompassRose::numThorns

(

)

const

Get the number of thorns.

Returns

Number of thorns

See also

setNumThorns(), setNumThornLevels()

setFlatStyle()

void QwtSimpleCompassRose::setFlatStyle

(

bool

on

)

Set flat style.

When enabled (default), thorns are drawn with a single solid color instead of the two-tone Light/Dark 3D effect.

Parameters

on	true for flat style, false for classic 3D style

See also

flatStyle()

setNumThornLevels()

void QwtSimpleCompassRose::setNumThornLevels

(

int

numThornLevels

)

Set the number of thorn levels.

Parameters

[in]

numThornLevels

Number of thorn levels

See also

setNumThorns(), numThornLevels()

setNumThorns()

void QwtSimpleCompassRose::setNumThorns

(

int

numThorns

)

Set the number of thorns on one level.

Parameters

[in]

numThorns

Number of thorns (aligned to multiple of 4, minimum 4)

See also

numThorns(), setNumThornLevels()

setShrinkFactor()

void QwtSimpleCompassRose::setShrinkFactor

(

double

factor

)

Set the shrink factor for thorns with each level.

Parameters

[in]

factor

Shrink factor (default: 0.9)

See also

shrinkFactor()

setWidth()

void QwtSimpleCompassRose::setWidth

(

double

width

)

Set the width of the rose heads.

Parameters

[in]

width

Width (range: 0.03 to 0.4, lower values make thinner heads)

shrinkFactor()

double QwtSimpleCompassRose::shrinkFactor

(

)

const

Get the shrink factor for thorns with each level.

Returns

Shrink factor

See also

setShrinkFactor()

width()

double QwtSimpleCompassRose::width

(

)

const

Get the width of the rose heads.

Returns

Width of the rose heads

See also

setWidth()

---

The documentation for this class was generated from the following files:

• /home/runner/work/QWT/QWT/src/plot/qwt_compass_rose.h
• /home/runner/work/QWT/QWT/src/plot/qwt_compass_rose.cpp