Scroll to navigation

QwtIntervalSymbol(3) Qwt User's Guide QwtIntervalSymbol(3)

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

Generated automatically by Doxygen for Qwt User's Guide from the source code.
Wed Jan 2 2019 Version 6.1.4