QwtSymbol Class Reference

A class for drawing symbols. More...

#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, const QBrush &, const QPen &, const QSizeF &)
virtual ~QwtSymbol ()
bool operator!= (const QwtSymbol &) const
virtual bool operator== (const QwtSymbol &) const
virtual QwtSymbolclone () const
void setSize (const QSizeF &)
void setSize (double width, double height=-1.0)
const QSizeF & size () const
virtual void setColor (const QColor &)
void setBrush (const QBrush &b)
const QBrush & brush () const
void setPen (const QPen &)
const QPen & pen () const
void setStyle (Style)
Style style () const
void draw (QPainter *p, const QPointF &) const
void draw (QPainter *p, double x, double y) const
virtual void draw (QPainter *p, const QRectF &r) const

Detailed Description

A class for drawing symbols.


Member Enumeration Documentation

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::Style  style,
const QBrush &  brush,
const QPen &  pen,
const QSizeF &  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 QRectF &  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,
double  x,
double  y 
) const

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

void QwtSymbol::draw ( QPainter *  painter,
const QPointF &  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::setColor ( const QColor &  color  )  [virtual]

Set the color of the symbol.

Change the color of the brush for symbol types with a filled area. For all other symbol types the color will be assigned to the pen.

Parameters:
color Color
See also:
setBrush(), setPen(), brush(), pen()
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 ( double  width,
double  height = -1.0 
)

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 -1.0)
void QwtSymbol::setSize ( const QSizeF &  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 QSizeF & QwtSymbol::size (  )  const [inline]

Return Size.

QwtSymbol::Style QwtSymbol::style (  )  const [inline]

Return Style.


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