QwtSymbol Class Reference

#include <qwt_symbol.h>

List of all members.

Public Types
enum	Style {   NoSymbol = -1,   Ellipse,   Rect,   Diamond,   Triangle,   DTriangle,   UTriangle,   LTriangle,   RTriangle,   Cross,   XCross,   HLine,   VLine,   Star1,   Star2,   Hexagon,   StyleCnt }

Public Member Functions
	QwtSymbol ()
	QwtSymbol (Style st, const QBrush &bd, const QPen &pn, const QSize &s)
virtual	~QwtSymbol ()
const QBrush &	brush () const
virtual QwtSymbol *	clone () const
void	draw (QPainter *p, const QPoint &pt) const
void	draw (QPainter *p, int x, int y) const
virtual void	draw (QPainter *p, const QRect &r) const
bool	operator!= (const QwtSymbol &) const
virtual bool	operator== (const QwtSymbol &) const
const QPen &	pen () const
void	setBrush (const QBrush &b)
void	setPen (const QPen &p)
void	setSize (const QSize &s)
void	setSize (int a, int b=-1)
void	setStyle (Style s)
const QSize &	size () const
Style	style () const

---

Detailed Description

A class for drawing symbols.

---

Member Enumeration Documentation

enum QwtSymbol::Style

Style

See also:

setStyle(), style()

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Constructor & Destructor Documentation

QwtSymbol::QwtSymbol

(

)

Default Constructor

The symbol is constructed with gray interior, black outline with zero width, no size and style 'NoSymbol'.

QwtSymbol::QwtSymbol	(	QwtSymbol::Style	style,
		const QBrush &	brush,
		const QPen &	pen,
		const QSize &	size
	)

Constructor.

Parameters:

style	Symbol Style
brush	brush to fill the interior
pen	outline pen
size	size

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Member Function Documentation

QwtSymbol * QwtSymbol::clone ( ) const

virtual

Allocate and return a symbol with the same attributes

Returns:

Cloned symbol

void QwtSymbol::draw	(	QPainter *	painter,
		const QPoint &	pos
	)		const

Draw the symbol at a specified point.

Parameters:

painter	Painter
pos	Center of the symbol

void QwtSymbol::draw ( QPainter *  painter, const QRect &  r  ) const

virtual

Draw the symbol into a bounding rectangle.

This function assumes that the painter has been initialized with brush and pen before. This allows a much more performant implementation when painting many symbols with the same brush and pen like in curves.

Parameters:

painter	Painter
r	Bounding rectangle

void QwtSymbol::setBrush

(

const QBrush &

brush

)

Assign a brush.

The brush is used to draw the interior of the symbol.

Parameters:

brush

Brush

void QwtSymbol::setPen

(

const QPen &

pen

)

Assign a pen

The pen is used to draw the symbol's outline.

The width of non cosmetic pens is scaled according to the resolution of the paint device.

Parameters:

pen

Pen

See also:

pen(), setBrush(), QwtPainter::scaledPen()

void QwtSymbol::setSize

(

const QSize &

size

)

Set the symbol's size

Parameters:

size

Size

void QwtSymbol::setSize	(	int	width,
		int	height = -1
	)

Specify the symbol's size.

If the 'h' parameter is left out or less than 0, and the 'w' parameter is greater than or equal to 0, the symbol size will be set to (w,w).

Parameters:

width	Width
height	Height (defaults to -1)

void QwtSymbol::setStyle

(

QwtSymbol::Style

s

)

Specify the symbol style.

The following styles are defined:

NoSymbol

No Style. The symbol cannot be drawn.

Ellipse

Ellipse or circle

Rect

Rectangle

Diamond

Diamond

Triangle

Triangle pointing upwards

DTriangle

Triangle pointing downwards

UTriangle

Triangle pointing upwards

LTriangle

Triangle pointing left

RTriangle

Triangle pointing right

Cross

Cross (+)

XCross

Diagonal cross (X)

HLine

Horizontal line

VLine

Vertical line

Star1

X combined with +

Star2

Six-pointed star

Hexagon

Hexagon

Parameters:

s

style