QwtSymbol - Man Page
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
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
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
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
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 *painter, const QPoint &pos) const
Draw the symbol at a specified point. Parameters:
painter Painter
pos Center of the symbol
void QwtSymbol::draw (QPainter *p, intx, inty) 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:
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:
- 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
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