QwtIntervalSymbol Class Reference

A drawing primitive for displaying an interval like an error bar. More...

#include <qwt_interval_symbol.h>

Public Types
enum	Style { NoSymbol = -1, Bar, Box, UserSymbol = 1000 }
	Symbol style. More...

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. More...
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

Style

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::QwtIntervalSymbol

(

Style

style = NoSymbol

)

Constructor

Parameters

style

Style of the symbol

See also

setStyle(), style(), Style

Member Function Documentation

brush()

const QBrush & QwtIntervalSymbol::brush

(

)

const

Returns

Brush

See also

setBrush()

draw()

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()

pen()

const QPen & QwtIntervalSymbol::pen

(

)

const

Returns

Pen

See also

setPen(), brush()

setBrush()

void QwtIntervalSymbol::setBrush

(

const QBrush &

brush

)

Assign a brush.

The brush is used for the Box style.

Parameters

brush

Brush

See also

brush()

setPen() [1/2]

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()

setPen() [2/2]

void QwtIntervalSymbol::setPen

(

const QPen &

pen

)

Assign a pen

Parameters

pen

Pen

See also

pen(), setBrush()

setStyle()

void QwtIntervalSymbol::setStyle

(

Style

style

)

Specify the symbol style

Parameters

style

Style

See also

style(), Style

setWidth()

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()

style()

QwtIntervalSymbol::Style QwtIntervalSymbol::style

(

)

const

Returns

Current symbol style

See also

setStyle()

width()

int QwtIntervalSymbol::width

(

)

const

Returns

Width of the symbol.

See also

setWidth(), setStyle()