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::null)
	Constructor. More...
	QwtPlotSvgItem (const QwtText &title)
	Constructor. More...
virtual	~QwtPlotSvgItem ()
	Destructor.
bool	loadFile (const QRectF &, const QString &fileName)
bool	loadData (const QRectF &, const QByteArray &)
virtual QRectF	boundingRect () const
	Bounding rectangle of the item.
virtual void	draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &rect) const
virtual int	rtti () 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

Protected Member Functions
const QSvgRenderer &	renderer () const
QSvgRenderer &	renderer ()
void	render (QPainter *painter, const QRectF &viewBox, const QRectF &rect) const
QRectF	viewBox (const QRectF &area) const
Protected Member Functions inherited from QwtPlotItem
QwtGraphic	defaultIcon (const QBrush &, const QSizeF &) const
	Return a default icon from a brush. More...

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.

Detailed Description

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

SVG images are often used to display maps

Constructor & Destructor Documentation

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

explicit

Constructor.

Sets the following item attributes:

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

Parameters

title

Title

QwtPlotSvgItem::QwtPlotSvgItem ( const QwtText &  title )

explicit

Constructor.

Sets the following item attributes:

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

Parameters

title

Title

Member Function Documentation

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

virtual

Draw the SVG item

Parameters

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

Implements QwtPlotItem.

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

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

void QwtPlotSvgItem::render ( QPainter *  painter, const QRectF &  viewBox, const QRectF &  rect  ) const

protected

Render the SVG data

Parameters

painter	Painter
viewBox	View Box, see QSvgRenderer::viewBox()
rect	Target rectangle on the paint device

const QSvgRenderer & QwtPlotSvgItem::renderer ( ) const

protected

Returns

Renderer used to render the SVG data

QSvgRenderer & QwtPlotSvgItem::renderer ( )

protected

Returns

Renderer used to render the SVG data

int QwtPlotSvgItem::rtti ( ) const

virtual

Returns

QwtPlotItem::Rtti_PlotSVG

Reimplemented from QwtPlotItem.

QRectF QwtPlotSvgItem::viewBox ( const QRectF &  rect ) const

protected

Calculate the view box from rect and boundingRect().

Parameters

rect	Rectangle in scale coordinates

Returns

View box, see QSvgRenderer::viewBox()