A plot item, which displays a recorded sequence of QPainter commands. More...

#include <qwt_plot_graphicitem.h>

Inheritance diagram for QwtPlotGraphicItem:

Classes
class	PrivateData

Public Member Functions
	QwtPlotGraphicItem (const QString &title=QString())
	Constructor.

	QwtPlotGraphicItem (const QwtText &title)
	Constructor.

virtual	~QwtPlotGraphicItem ()
	Destructor.

void	setGraphic (const QRectF &rect, const QwtGraphic &)
	Set the graphic to be displayed.

QwtGraphic	graphic () const

virtual QRectF	boundingRect () const QWT_OVERRIDE
	Bounding rectangle of the item.

virtual void	draw (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect) const QWT_OVERRIDE
	Draw the item.

virtual int	rtti () const QWT_OVERRIDE

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 recorded sequence of QPainter commands.

QwtPlotGraphicItem renders a sequence of recorded painter commands into a specific plot area. Recording of painter commands can be done manually by QPainter or e.g. QSvgRenderer.

See also: QwtPlotShapeItem, QwtPlotSvgItem

Constructor & Destructor Documentation

◆ QwtPlotGraphicItem() [1/2]

QwtPlotGraphicItem::QwtPlotGraphicItem ( const QString & title = QString() )

explicit

Constructor.

Sets the following item attributes:

QwtPlotItem::AutoScale: true
QwtPlotItem::Legend: false

Parameters

title Title

◆ QwtPlotGraphicItem() [2/2]

QwtPlotGraphicItem::QwtPlotGraphicItem ( const QwtText & title )

explicit

Constructor.

Sets the following item attributes:

QwtPlotItem::AutoScale: true
QwtPlotItem::Legend: false

Parameters

title Title

Member Function Documentation

◆ boundingRect()

QRectF QwtPlotGraphicItem::boundingRect ( ) const

virtual

Bounding rectangle of the item.

Reimplemented from QwtPlotItem.

◆ draw()

void QwtPlotGraphicItem::draw	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect
	)		const

virtual

Draw the item.

Parameters

painter	Painter
xMap	X-Scale Map
yMap	Y-Scale Map
canvasRect	Contents rect of the plot canvas

Implements QwtPlotItem.

◆ graphic()

QwtGraphic QwtPlotGraphicItem::graphic ( ) const

Returns: Recorded sequence of painter commands

See also: setGraphic()

◆ rtti()

int QwtPlotGraphicItem::rtti ( ) const

virtual

Returns: QwtPlotItem::Rtti_PlotGraphic

Reimplemented from QwtPlotItem.

◆ setGraphic()

void QwtPlotGraphicItem::setGraphic	(	const QRectF &	rect,
		const QwtGraphic &	graphic
	)

Set the graphic to be displayed.

Parameters

rect	Rectangle in plot coordinates
graphic	Recorded sequence of painter commands

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

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

Classes

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QwtPlotGraphicItem() [1/2]

◆ QwtPlotGraphicItem() [2/2]

Member Function Documentation

◆ boundingRect()

◆ draw()

◆ graphic()

◆ rtti()

◆ setGraphic()