Qwt User's Guide 5.2.2
Public Types | Public Member Functions

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

const QBrush & brush () const
virtual QwtSymbolclone () 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
 QwtSymbol (Style st, const QBrush &bd, const QPen &pn, const QSize &s)
 QwtSymbol ()
void setBrush (const QBrush &b)
void setPen (const QPen &p)
void setSize (int a, int b=-1)
void setSize (const QSize &s)
void setStyle (Style s)
const QSize & size () const
Style style () const
virtual ~QwtSymbol ()

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 QSize &  size 
)

Constructor.

Parameters:
styleSymbol Style
brushbrush to fill the interior
penoutline pen
sizesize
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:
painterPainter
rBounding rectangle
void QwtSymbol::draw ( QPainter *  painter,
const QPoint &  pos 
) const

Draw the symbol at a specified point.

Parameters:
painterPainter
posCenter of the symbol
void QwtSymbol::draw ( QPainter *  p,
int  x,
int  y 
) const

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

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:
brushBrush
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:
penPen
See also:
pen(), setBrush(), QwtPainter::scaledPen()
void QwtSymbol::setSize ( const QSize &  size)

Set the symbol's size

Parameters:
sizeSize
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:
widthWidth
heightHeight (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:
sstyle
const QSize& QwtSymbol::size ( ) const [inline]

Return Size.

Style QwtSymbol::style ( ) const [inline]

Return Style.