QwtIntervalSymbol - Man Page

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

Generated automatically by Doxygen for Qwt User's Guide from the source code.

Info

Mon Jun 1 2020 Version 6.1.5 Qwt User's Guide