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QwtSymbol(3) Qwt User's Guide QwtSymbol(3)

NAME

QwtSymbol -

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 ()
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()

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::Stylestyle, 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

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 (intwidth, intheight = -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::Styles)

Specify the symbol style. The following styles are defined:

No Style. The symbol cannot be drawn.
Ellipse or circle
Rectangle
Diamond
Triangle pointing upwards
Triangle pointing downwards
Triangle pointing upwards
Triangle pointing left
Triangle pointing right
Cross (+)
Diagonal cross (X)
Horizontal line
Vertical line
X combined with +
Six-pointed star
Hexagon

Parameters:

s style

Author

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Tue Nov 20 2012 Version 5.2.3