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QwtSymbol

NAME

QwtSymbol -

A class for drawing symbols.

SYNOPSIS

#include <qwt_symbol.h>

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 ()

bool operator!= (const QwtSymbol &) const

virtual bool operator== (const QwtSymbol &) const

virtual QwtSymbol * clone () const

void setSize (const QSize &s)

void setSize (int a, int b=-1)

void setBrush (const QBrush &b)

void setPen (const QPen &p)

void setStyle (Style s)

const QBrush & brush () const

const QPen & pen () const

const QSize & size () const

Style style () 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

Detailed Description

A class for drawing symbols.

Member Enumeration Documentation

enum QwtSymbol::StyleStyle

See also:

setStyle(), style()

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

QwtSymbol::~QwtSymbol () [virtual]

Destructor.

Member Function Documentation

const QBrush& QwtSymbol::brush () const [inline]

Return Brush.

QwtSymbol * QwtSymbol::clone () const [virtual]Allocate and return a symbol with the same attributes

Returns:

Cloned 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::draw (QPainter * p, int x, int y) const

Draw the symbol at a point (x,y).

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

Draw the symbol at a specified point. Parameters:

painter Painter
pos Center of the symbol

bool QwtSymbol::operator!= (const QwtSymbol & other) const

!= operator

bool QwtSymbol::operator== (const QwtSymbol & other) const [virtual]

== operator

const QPen& QwtSymbol::pen () const [inline]

Return Pen.

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 (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::setSize (const QSize & size)Set the symbol's size

Parameters:

size Size

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

const QSize& QwtSymbol::size () const [inline]

Return Size.

Style QwtSymbol::style () const [inline]

Return Style.

Author

Generated automatically by Doxygen for Qwt User's Guide from the source code.