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. More...
virtual	~QwtPlotZoneItem ()
	Destructor.
virtual int	rtti () const
void	setOrientation (Qt::Orientation)
	Set the orientation of the zone. More...
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. More...
const QPen &	pen () const
void	setBrush (const QBrush &)
	Assign a brush. More...
const QBrush &	brush () const
virtual void	draw (QPainter *, const QwtScaleMap &, const QwtScaleMap &, const QRectF &) const
virtual QRectF	boundingRect () const
Public Member Functions inherited from QwtPlotItem
	QwtPlotItem (const QwtText &title=QwtText())
virtual	~QwtPlotItem ()
	Destroy the QwtPlotItem.
void	attach (QwtPlot *plot)
	Attach the item to a plot. More...
void	detach ()
	This method detaches a QwtPlotItem from any QwtPlot it has been associated with. More...
QwtPlot *	plot () const
	Return attached plot.
void	setTitle (const QString &title)
void	setTitle (const QwtText &title)
const QwtText &	title () const
void	setItemAttribute (ItemAttribute, bool on=true)
bool	testItemAttribute (ItemAttribute) const
void	setItemInterest (ItemInterest, bool on=true)
bool	testItemInterest (ItemInterest) const
void	setRenderHint (RenderHint, bool on=true)
bool	testRenderHint (RenderHint) const
void	setRenderThreadCount (uint numThreads)
uint	renderThreadCount () const
void	setLegendIconSize (const QSize &)
QSize	legendIconSize () const
double	z () const
void	setZ (double z)
	Set the z value. More...
void	show ()
	Show the item.
void	hide ()
	Hide the item.
virtual void	setVisible (bool)
bool	isVisible () const
void	setAxes (int xAxis, int yAxis)
void	setXAxis (int axis)
int	xAxis () const
	Return xAxis.
void	setYAxis (int axis)
int	yAxis () const
	Return yAxis.
virtual void	itemChanged ()
virtual void	legendChanged ()
virtual void	getCanvasMarginHint (const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasSize, double &left, double &top, double &right, double &bottom) const
	Calculate a hint for the canvas margin. More...
virtual void	updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &)
	Update the item to changes of the axes scale division. More...
virtual void	updateLegend (const QwtPlotItem *, const QList< QwtLegendData > &)
	Update the item to changes of the legend info. More...
QRectF	scaleRect (const QwtScaleMap &, const QwtScaleMap &) const
	Calculate the bounding scale rectangle of 2 maps. More...
QRectF	paintRect (const QwtScaleMap &, const QwtScaleMap &) const
	Calculate the bounding paint rectangle of 2 maps. More...
virtual QList< QwtLegendData >	legendData () const
	Return all information, that is needed to represent the item on the legend. More...
virtual QwtGraphic	legendIcon (int index, const QSizeF &) const

Additional Inherited Members
Public Types inherited from QwtPlotItem
enum	RttiValues {   Rtti_PlotItem = 0, Rtti_PlotGrid, Rtti_PlotScale, Rtti_PlotLegend,   Rtti_PlotMarker, Rtti_PlotCurve, Rtti_PlotSpectroCurve, Rtti_PlotIntervalCurve,   Rtti_PlotHistogram, Rtti_PlotSpectrogram, Rtti_PlotSVG, Rtti_PlotTradingCurve,   Rtti_PlotBarChart, Rtti_PlotMultiBarChart, Rtti_PlotShape, Rtti_PlotTextLabel,   Rtti_PlotZone, Rtti_PlotUserItem = 1000 }
	Runtime type information. More...
enum	ItemAttribute { Legend = 0x01, AutoScale = 0x02, Margins = 0x04 }
	Plot Item Attributes. More...
enum	ItemInterest { ScaleInterest = 0x01, LegendInterest = 0x02 }
	Plot Item Interests. More...
enum	RenderHint { RenderAntialiased = 0x1 }
	Render hints. More...
typedef QFlags< ItemAttribute >	ItemAttributes
	Plot Item Attributes.
typedef QFlags< ItemInterest >	ItemInterests
	Plot Item Interests.
typedef QFlags< RenderHint >	RenderHints
	Render hints.
Protected Member Functions inherited from QwtPlotItem
QwtGraphic	defaultIcon (const QBrush &, const QSizeF &) const
	Return a default icon from a brush. More...

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()