NAME
QwtIntervalSymbol - A drawing primitive for displaying an interval like an error bar.
SYNOPSIS
#include <qwt_interval_symbol.h>
Public Types
enum Style { NoSymbol = -1, Bar, Box, UserSymbol = 1000 }
Symbol style.
Public Member Functions
QwtIntervalSymbol (Style=NoSymbol)
QwtIntervalSymbol (const QwtIntervalSymbol &)
Copy constructor. virtual ~QwtIntervalSymbol ()
Destructor. QwtIntervalSymbol & operator= (const QwtIntervalSymbol &)
Assignment operator. bool operator== (const QwtIntervalSymbol &) const
Compare two symbols. bool operator!= (const QwtIntervalSymbol &) const
Compare two symbols. void setWidth (int)
int width () const
void setBrush (const QBrush &)
Assign a brush. const QBrush & brush () const
void setPen (const QColor &, qreal width=0.0, Qt::PenStyle=Qt::SolidLine)
void setPen (const QPen &)
const QPen & pen () const
void setStyle (Style)
Style style () const
virtual void draw (QPainter *, Qt::Orientation, const QPointF &from, const QPointF &to) const
Detailed Description
A drawing primitive for displaying an interval like an error bar.
See also:
QwtPlotIntervalCurve
Member Enumeration Documentation
enum QwtIntervalSymbol::Style
Symbol style.
Enumerator
- NoSymbol
-
No Style. The symbol cannot be drawn.
- Bar
-
The symbol displays a line with caps at the beginning/end. The size of the caps depends on the symbol width().
- Box
-
The symbol displays a plain rectangle using pen() and brush(). The size of the rectangle depends on the translated interval and the width(),
- UserSymbol
-
Styles >= UserSymbol are reserved for derived classes of QwtIntervalSymbol that overload draw() with additional application specific symbol types.
Constructor & Destructor Documentation
QwtIntervalSymbol::QwtIntervalSymbol (Style style = NoSymbol)
Constructor
Parameters:
style Style of the symbol
See also:
setStyle(), style(), Style
Member Function Documentation
const QBrush & QwtIntervalSymbol::brush () const
Returns:
Brush
See also:
setBrush()
void QwtIntervalSymbol::draw (QPainter * painter, Qt::Orientation orientation, const QPointF & from, const QPointF & to) const [virtual]
Draw a symbol depending on its style
Parameters:
painter Painter
orientation Orientation
from Start point of the interval in target device coordinates
to End point of the interval in target device coordinates
See also:
setStyle()
const QPen & QwtIntervalSymbol::pen () const
Returns:
Pen
See also:
setPen(), brush()
void QwtIntervalSymbol::setBrush (const QBrush & brush)
Assign a brush. The brush is used for the Box style.
Parameters:
brush Brush
See also:
brush()
void QwtIntervalSymbol::setPen (const QColor & color, qreal width = 0.0, Qt::PenStyle style = Qt::SolidLine)
Build and assign a pen
In Qt5 the default pen width is 1.0 ( 0.0 in Qt4 ) what makes it non cosmetic ( see QPen::isCosmetic() ). This method has been introduced to hide this incompatibility.
Parameters:
color Pen color
width Pen width
style Pen style
See also:
pen(), brush()
void QwtIntervalSymbol::setPen (const QPen & pen)
Assign a pen
Parameters:
pen Pen
See also:
pen(), setBrush()
void QwtIntervalSymbol::setStyle (Style style)
Specify the symbol style
Parameters:
style Style
See also:
style(), Style
void QwtIntervalSymbol::setWidth (int width)
Specify the width of the symbol It is used depending on the style.
Parameters:
width Width
See also:
width(), setStyle()
QwtIntervalSymbol::Style QwtIntervalSymbol::style () const
Returns:
Current symbol style
See also:
setStyle()
int QwtIntervalSymbol::width () const
Returns:
Width of the symbol.
See also:
setWidth(), setStyle()
Author
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