Qwt User's Guide  6.1.0
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Public Member Functions | Protected Member Functions | List of all members
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:
Inheritance graph
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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...
 
QwtPlotplot () const
 Return attached plot.
 
void setTitle (const QString &title)
 
void setTitle (const QwtText &title)
 
const QwtTexttitle () 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< QwtLegendDatalegendData () 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< ItemAttributeItemAttributes
 Plot Item Attributes.
 
typedef QFlags< ItemInterestItemInterests
 Plot Item Interests.
 
typedef QFlags< RenderHintRenderHints
 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:

Parameters
titleTitle
QwtPlotSvgItem::QwtPlotSvgItem ( const QwtText title)
explicit

Constructor.

Sets the following item attributes:

Parameters
titleTitle

Member Function Documentation

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

Draw the SVG item

Parameters
painterPainter
xMapX-Scale Map
yMapY-Scale Map
canvasRectContents rect of the plot canvas

Implements QwtPlotItem.

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

Load SVG data

Parameters
rectBounding rectangle
datain 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
rectBounding rectangle
fileNameSVG 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
painterPainter
viewBoxView Box, see QSvgRenderer::viewBox()
rectTarget 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
rectRectangle in scale coordinates
Returns
View box, see QSvgRenderer::viewBox()