QwtSymbol Class Reference
A class for drawing symbols. More...
#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 | |
| QwtSymbol () | |
| QwtSymbol (Style st, const QBrush &bd, const QPen &pn, const QSize &s) | |
| virtual | ~QwtSymbol () |
| bool | operator!= (const QwtSymbol &) const |
| virtual bool | operator== (const QwtSymbol &) const |
| virtual QwtSymbol * | clone () 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 |
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::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
| 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 * | p, | |
| int | x, | |||
| int | y | |||
| ) | const |
Draw the symbol at a point (x,y).
| void QwtSymbol::draw | ( | QPainter * | painter, | |
| const QPoint & | 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::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 | ( | 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:
-
width Width height Height (defaults to -1)
| void QwtSymbol::setSize | ( | const QSize & | 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 QSize& QwtSymbol::size | ( | ) | const [inline] |
Return Size.
| Style QwtSymbol::style | ( | ) | const [inline] |
Return Style.
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