QwtPlotSvgItem Class Reference

A plot item, which displays data in Scalable Vector Graphics (SVG) format. More...

#include <qwt_plot_svgitem.h>

Inheritance diagram for QwtPlotSvgItem:

Public Member Functions
	QwtPlotSvgItem (const QString &title=QString())
	Constructor.
	QwtPlotSvgItem (const QwtText &title)
	Constructor.
virtual	~QwtPlotSvgItem ()
	Destructor.
bool	loadFile (const QRectF &, const QString &fileName)
	Load a SVG file.
bool	loadData (const QRectF &, const QByteArray &)
	Load SVG data.
Public Member Functions inherited from QwtPlotGraphicItem
	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 data in Scalable Vector Graphics (SVG) format.

SVG images are often used to display maps

QwtPlotSvgItem is only a small convenience wrapper class for QwtPlotGraphicItem, that creates a QwtGraphic from SVG data.

Constructor & Destructor Documentation

QwtPlotSvgItem() [1/2]

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

explicit

Constructor.

Parameters

title

Title

QwtPlotSvgItem() [2/2]

QwtPlotSvgItem::QwtPlotSvgItem ( const QwtText &  title )

explicit

Constructor.

Parameters

title

Title

Member Function Documentation

loadData()

bool QwtPlotSvgItem::loadData	(	const QRectF &	rect,
		const QByteArray &	data
	)

Load SVG data.

Parameters

rect	Bounding rectangle
data	in SVG format

Returns

true, if the SVG data could be loaded

loadFile()

bool QwtPlotSvgItem::loadFile	(	const QRectF &	rect,
		const QString &	fileName
	)

Load a SVG file.

Parameters

rect	Bounding rectangle
fileName	SVG file name

Returns

true, if the SVG file could be loaded

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

• /home/runner/work/QWT/QWT/src/qwt_plot_svgitem.h
• /home/runner/work/QWT/QWT/src/qwt_plot_svgitem.cpp