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

#include <qwt_plot_zoneitem.h>

Inheritance diagram for QwtPlotZoneItem:

Classes
class	PrivateData

Public Member Functions
	QwtPlotZoneItem ()
	Constructor.

virtual	~QwtPlotZoneItem ()
	Destructor.

virtual int	rtti () const QWT_OVERRIDE

void	setOrientation (Qt::Orientation)
	Set the orientation of the zone.

Qt::Orientation	orientation () const

void	setInterval (double min, double max)
	Set the interval of the zone.

void	setInterval (const QwtInterval &)
	Set the interval of the zone.

QwtInterval	interval () const

void	setPen (const QColor &, qreal width=0.0, Qt::PenStyle=Qt::SolidLine)
	Build and assign a pen.

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 &canvasRect) const QWT_OVERRIDE
	Draw the zone.

virtual QRectF	boundingRect () const QWT_OVERRIDE
	The bounding rectangle is build from the interval in one direction and something invalid for the opposite direction.

Public Member Functions inherited from QwtPlotItem
	QwtPlotItem ()
	Constructor.

	QwtPlotItem (const QString &title)
	Constructor.

	QwtPlotItem (const QwtText &title)
	Constructor.

virtual	~QwtPlotItem ()
	Destroy the QwtPlotItem.

void	attach (QwtPlot *plot)
	Attach the item to a plot.

void	detach ()
	This method detaches a QwtPlotItem from any QwtPlot it has been associated with.

QwtPlot *	plot () const
	Return attached plot.

void	setTitle (const QString &title)
	Set a new title.

void	setTitle (const QwtText &title)
	Set a new title.

const QwtText &	title () const

void	setItemAttribute (ItemAttribute, bool on=true)
	Toggle an item attribute.

bool	testItemAttribute (ItemAttribute) const
	Test an item attribute.

void	setItemInterest (ItemInterest, bool on=true)
	Toggle an item interest.

bool	testItemInterest (ItemInterest) const
	Test an item interest.

void	setRenderHint (RenderHint, bool on=true)
	Toggle an render hint.

bool	testRenderHint (RenderHint) const
	Test a render hint.

void	setRenderThreadCount (uint numThreads)
	On multi core systems rendering of certain plot item ( f.e QwtPlotRasterItem ) can be done in parallel in several threads.

uint	renderThreadCount () const

void	setLegendIconSize (const QSize &)
	Set the size of the legend icon.

QSize	legendIconSize () const

double	z () const
	Plot items are painted in increasing z-order.

void	setZ (double z)
	Set the z value.

void	show ()
	Show the item.

void	hide ()
	Hide the item.

virtual void	setVisible (bool)
	Show/Hide the item.

bool	isVisible () const

void	setAxes (QwtAxisId xAxis, QwtAxisId yAxis)
	Set X and Y axis.

void	setXAxis (QwtAxisId)
	Set the X axis.

QwtAxisId	xAxis () const
	Return xAxis.

void	setYAxis (QwtAxisId)
	Set the Y axis.

QwtAxisId	yAxis () const
	Return yAxis.

virtual void	itemChanged ()
	Update the legend and call QwtPlot::autoRefresh() for the parent plot.

virtual void	legendChanged ()
	Update the legend of the parent plot.

virtual void	getCanvasMarginHint (const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, double &left, double &top, double &right, double &bottom) const
	Calculate a hint for the canvas margin.

virtual void	updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &)
	Update the item to changes of the axes scale division.

virtual void	updateLegend (const QwtPlotItem *, const QList< QwtLegendData > &)
	Update the item to changes of the legend info.

QRectF	scaleRect (const QwtScaleMap &, const QwtScaleMap &) const
	Calculate the bounding scale rectangle of 2 maps.

QRectF	paintRect (const QwtScaleMap &, const QwtScaleMap &) const
	Calculate the bounding paint rectangle of 2 maps.

virtual QList< QwtLegendData >	legendData () const
	Return all information, that is needed to represent the item on the legend.

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_PlotGraphic , Rtti_PlotTradingCurve , Rtti_PlotBarChart , Rtti_PlotMultiBarChart , Rtti_PlotShape , Rtti_PlotTextLabel , Rtti_PlotZone , Rtti_PlotVectorField , 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/绘图项关注的事件类型 More...

enum	RenderHint { RenderAntialiased = 0x1 }
	Render hints. More...

Protected Member Functions inherited from QwtPlotItem
QwtGraphic	defaultIcon (const QBrush &, const QSizeF &) const
	Return a default icon from a brush.

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::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

◆ boundingRect()

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.

◆ brush()

const QBrush & QwtPlotZoneItem::brush ( ) const

Returns: Brush used to fill the zone

See also: setPen(), brush()

◆ draw()

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.

◆ interval()

QwtInterval QwtPlotZoneItem::interval ( ) const

Returns: Zone interval

See also: setInterval(), orientation()

◆ orientation()

Qt::Orientation QwtPlotZoneItem::orientation ( ) const

Returns: Orientation of the zone

See also: setOrientation()

◆ pen()

const QPen & QwtPlotZoneItem::pen ( ) const

Returns: Pen used to draw the border lines

See also: setPen(), brush()

◆ rtti()

int QwtPlotZoneItem::rtti ( ) const

virtual

Returns: QwtPlotItem::Rtti_PlotZone

Reimplemented from QwtPlotItem.

◆ setBrush()

void QwtPlotZoneItem::setBrush ( const QBrush & brush )

Assign a brush.

The brush is used to fill the zone

Parameters

brush Brush

See also: pen(), setBrush()

◆ setInterval() [1/2]

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()

◆ setInterval() [2/2]

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()

◆ 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()

◆ setPen() [1/2]

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()

◆ setPen() [2/2]

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()

The documentation for this class was generated from the following files:

/home/runner/work/QWT/QWT/src/qwt_plot_zoneitem.h
/home/runner/work/QWT/QWT/src/qwt_plot_zoneitem.cpp

Classes

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QwtPlotZoneItem()

Member Function Documentation

◆ boundingRect()

◆ brush()

◆ draw()

◆ interval()

◆ orientation()

◆ pen()

◆ rtti()

◆ setBrush()

◆ setInterval() [1/2]

◆ setInterval() [2/2]

◆ setOrientation()

◆ setPen() [1/2]

◆ setPen() [2/2]