QwtPlotZoneItem Class Reference

A plot item, which displays a zone. More...

#include <qwt_plot_zoneitem.h>

Inheritance diagram for QwtPlotZoneItem:

Public Member Functions
	QwtPlotZoneItem ()
	Constructor.
virtual	~QwtPlotZoneItem ()
	Destructor.
virtual int	rtti () const
void	setOrientation (Qt::Orientation)
	Set the orientation of the zone.
Qt::Orientation	orientation ()
void	setInterval (double min, double max)
void	setInterval (const QwtInterval &)
QwtInterval	interval () const
void	setPen (const QColor &, qreal width=0.0, Qt::PenStyle=Qt::SolidLine)
void	setPen (const QPen &)
	Assign a pen.
const QPen &	pen () const
void	setBrush (const QBrush &)
	Assign a brush.
const QBrush &	brush () const
virtual void	draw (QPainter *, const QwtScaleMap &, const QwtScaleMap &, const QRectF &) const
virtual QRectF	boundingRect () const

---

Detailed Description

A plot item, which displays a zone.

A horizontal zone highlights an interval of the y axis - a vertical zone an interval of the x axis - and is unbounded in the opposite direction. It is filled with a brush and its border lines are optionally displayed with a pen.

Note:

For displaying an area that is bounded for x and y coordinates use QwtPlotShapeItem

---

Constructor & Destructor Documentation

QwtPlotZoneItem::QwtPlotZoneItem

(

)

[explicit]

Constructor.

Initializes the zone with no pen and a semi transparent gray brush

Sets the following item attributes:

• QwtPlotItem::AutoScale: false
• QwtPlotItem::Legend: false

The z value is initialized by 5

See also:

QwtPlotItem::setItemAttribute(), QwtPlotItem::setZ()

---

Member Function Documentation

QRectF QwtPlotZoneItem::boundingRect

(

)

const [virtual]

The bounding rectangle is build from the interval in one direction and something invalid for the opposite direction.

Returns:

An invalid rectangle with valid boundaries in one direction

Reimplemented from QwtPlotItem.

const QBrush & QwtPlotZoneItem::brush

(

)

const

Returns:

Brush used to fill the zone

See also:

setPen(), brush()

void QwtPlotZoneItem::draw	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect
	)		const [virtual]

Draw the zone

Parameters:

painter	Painter
xMap	x Scale Map
yMap	y Scale Map
canvasRect	Contents rectangle of the canvas in painter coordinates

Implements QwtPlotItem.

QwtInterval QwtPlotZoneItem::interval

(

)

const

Returns:

Zone interval

See also:

setInterval(), orientation()

Qt::Orientation QwtPlotZoneItem::orientation

(

)

Returns:

Orientation of the zone

See also:

setOrientation()

const QPen & QwtPlotZoneItem::pen

(

)

const

Returns:

Pen used to draw the border lines

See also:

setPen(), brush()

int QwtPlotZoneItem::rtti

(

)

const [virtual]

Returns:

QwtPlotItem::Rtti_PlotZone

Reimplemented from QwtPlotItem.

void QwtPlotZoneItem::setBrush

(

const QBrush &

brush

)

Assign a brush.

The brush is used to fill the zone

Parameters:

brush

Brush

See also:

pen(), setBrush()

void QwtPlotZoneItem::setInterval	(	double	min,
		double	max
	)

Set the interval of the zone

For a horizontal zone the interval is related to the y axis, for a vertical zone it is related to the x axis.

Parameters:

min	Minimum of the interval
max	Maximum of the interval

See also:

interval(), setOrientation()

void QwtPlotZoneItem::setInterval

(

const QwtInterval &

interval

)

Set the interval of the zone

For a horizontal zone the interval is related to the y axis, for a vertical zone it is related to the x axis.

Parameters:

interval

Zone interval

See also:

interval(), setOrientation()

void QwtPlotZoneItem::setOrientation

(

Qt::Orientation

orientation

)

Set the orientation of the zone.

A horizontal zone highlights an interval of the y axis, a vertical zone of the x axis. It is unbounded in the opposite direction.

See also:

orientation(), QwtPlotItem::setAxes()

void QwtPlotZoneItem::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 QwtPlotZoneItem::setPen

(

const QPen &

pen

)

Assign a pen.

The pen is used to draw the border lines of the zone

Parameters:

pen

Pen

See also:

pen(), setBrush()

List of all members.