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QwtSymbol

NAME

QwtSymbol -

SYNOPSIS

Detailed Description

A class for drawing symbols.

Definition at line 22 of file 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

bool operator== (const QwtSymbol &) 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

Member Enumeration Documentation

enum QwtSymbol::Style

Style

See also:

QwtSymbol::setStyle, QwtSymbol::style

Definition at line 29 of file qwt_symbol.h.

Constructor & Destructor Documentation

QwtSymbol::QwtSymbol ()

Default Constructor

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

Definition at line 22 of file qwt_symbol.cpp.

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

Definition at line 37 of file qwt_symbol.cpp.

QwtSymbol::~QwtSymbol () [virtual]

Destructor.

Definition at line 47 of file qwt_symbol.cpp.

Member Function Documentation

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

Return Brush.

Definition at line 67 of file qwt_symbol.h.

Referenced by QwtPlotCurve::drawSymbols(), and operator==().

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

Definition at line 116 of file qwt_symbol.cpp.

References QwtPainter::drawEllipse(), QwtPainter::drawLine(), QwtPainter::drawPolygon(), and QwtPainter::drawRect().

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

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

Definition at line 100 of file qwt_symbol.cpp.

References draw().

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

Draw the symbol at a specified point.

Parameters:

painter Painter
pos Center of the symbol

Definition at line 294 of file qwt_symbol.cpp.

References QwtPainter::metricsMap().

Referenced by draw(), and QwtPlotCurve::drawSymbols().

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

!= operator

Definition at line 342 of file qwt_symbol.cpp.

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

== operator

Definition at line 335 of file qwt_symbol.cpp.

References brush(), pen(), size(), and style().

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

Return Pen.

Definition at line 69 of file qwt_symbol.h.

Referenced by QwtPlotCurve::drawSymbols(), and operator==().

void QwtSymbol::setBrush (const QBrush & br)

Assign a brush.

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

Parameters:

br brush

Definition at line 80 of file qwt_symbol.cpp.

void QwtSymbol::setPen (const QPen & pn)

Assign a pen.

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

Parameters:

pn pen

Definition at line 92 of file qwt_symbol.cpp.

void QwtSymbol::setSize (int w, int h = -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:

w width
h height (defaults to -1)

Definition at line 60 of file qwt_symbol.cpp.

void QwtSymbol::setSize (const QSize & s)

Set the symbol's size.

Definition at line 68 of file qwt_symbol.cpp.

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

Definition at line 329 of file qwt_symbol.cpp.

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

Return Size.

Definition at line 71 of file qwt_symbol.h.

Referenced by QwtPlotCurve::drawSymbols(), and operator==().

Style QwtSymbol::style () const [inline]

Return Style.

Definition at line 73 of file qwt_symbol.h.

Referenced by operator==().

Author

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