NAME
QwtSymbol -
SYNOPSIS
Detailed Description
A class for drawing symbols.
Definition at line 22 of file qwt_symbol.h.
Public Types
enum Style { None, Ellipse, Rect, Diamond, Triangle, DTriangle,
UTriangle, LTriangle, RTriangle, Cross, XCross, 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 ’None’. 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
Return Brush.
Definition at line 47 of file qwt_symbol.h.
Referenced by QwtPlotPrintFilter::apply(),
QwtLegendItem::drawIdentifier(), QwtCurve::drawSymbols(), operator==(),
and QwtPlotPrintFilter::reset().
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 * painter, 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 198 of file qwt_symbol.cpp.
Referenced by draw(), QwtMarker::draw(),
QwtLegendItem::drawIdentifier(), and QwtCurve::drawSymbols().
bool QwtSymbol::operator!= (const QwtSymbol &) const
!= operator
Definition at line 240 of file qwt_symbol.cpp.
bool QwtSymbol::operator== (const QwtSymbol &) const
== operator
Definition at line 233 of file qwt_symbol.cpp.
References brush(), pen(), size(), and style().
const QPen& QwtSymbol::pen () const
Return Pen.
Definition at line 49 of file qwt_symbol.h.
Referenced by QwtPlotPrintFilter::apply(),
QwtLegendItem::drawIdentifier(), QwtCurve::drawSymbols(), operator==(),
and QwtPlotPrintFilter::reset().
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.
Referenced by QwtPlotPrintFilter::apply(), and
QwtPlotPrintFilter::reset().
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.
Referenced by QwtPlotPrintFilter::apply(), and
QwtPlotPrintFilter::reset().
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:
QwtSymbol::None<dd>No Style. The symbol cannot be drawn.
QwtSymbol::Ellipse<dd>Ellipse or circle
QwtSymbol::Rect<dd>Rectangle
QwtSymbol::Diamond<dd>Diamond
QwtSymbol::Triangle<dd>Triangle pointing upwards
QwtSymbol::DTriangle<dd>Triangle pointing downwards
QwtSymbol::UTriangle<dd>Triangle pointing upwards
QwtSymbol::LTriangle<dd>Triangle pointing left
QwtSymbol::RTriangle<dd>Triangle pointing right
QwtSymbol::Cross<dd>Cross
QwtSymbol::XCross<dd>Diagonal cross
Parameters:
s style
Definition at line 227 of file qwt_symbol.cpp.
const QSize& QwtSymbol::size () const
Return Size.
Definition at line 51 of file qwt_symbol.h.
Referenced by QwtMarker::draw(), QwtLegendItem::drawIdentifier(),
QwtCurve::drawSymbols(), and operator==().
Style QwtSymbol::style () const
Return Style.
Definition at line 53 of file qwt_symbol.h.
Referenced by QwtPlot::closestMarker(), QwtMarker::draw(),
QwtCurve::draw(), QwtLegendItem::drawIdentifier(), operator==(), and
QwtPlot::updateLegendItem().
Author
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