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QwtPlotSvgItem

NAME

QwtPlotSvgItem -

SYNOPSIS

Inherits QwtPlotItem.

Detailed Description

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

SVG images are often used to display maps

Definition at line 31 of file qwt_plot_svgitem.h.

Public Member Functions

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

QwtPlotSvgItem (const QwtText &title)

virtual ~QwtPlotSvgItem ()

bool loadFile (const QwtDoubleRect &, const QString &fileName)

bool loadData (const QwtDoubleRect &, const QByteArray &)

virtual QwtDoubleRect boundingRect () const

virtual void draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRect &rect) const

virtual int rtti () const

Protected Member Functions

void render (QPainter *painter, const QwtDoubleRect &viewBox, const QRect &rect) const

QwtDoubleRect viewBox (const QwtDoubleRect &area) const

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

Definition at line 51 of file qwt_plot_svgitem.cpp.

QwtPlotSvgItem::QwtPlotSvgItem (const QwtText & title) [explicit]

Constructor.

Sets the following item attributes:

•

QwtPlotItem::AutoScale: true

•

QwtPlotItem::Legend: false

Parameters:

title Title

Definition at line 66 of file qwt_plot_svgitem.cpp.

QwtPlotSvgItem::~QwtPlotSvgItem () [virtual]

Destructor.

Definition at line 73 of file qwt_plot_svgitem.cpp.

Member Function Documentation

bool QwtPlotSvgItem::loadFile (const QwtDoubleRect & 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

Definition at line 102 of file qwt_plot_svgitem.cpp.

References QwtPlotItem::itemChanged().

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

Load SVG data

Parameters:

rect Bounding rectangle
data in SVG format

Returns:

true, if the SVG data could be loaded

Definition at line 123 of file qwt_plot_svgitem.cpp.

References QwtPlotItem::itemChanged().

QwtDoubleRect QwtPlotSvgItem::boundingRect () const [virtual]

Bounding rect of the item.

Reimplemented from QwtPlotItem.

Definition at line 142 of file qwt_plot_svgitem.cpp.

Referenced by draw(), and viewBox().

void QwtPlotSvgItem::draw (QPainter * painter, const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRect & 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.

Definition at line 170 of file qwt_plot_svgitem.cpp.

References boundingRect(), QwtPlotItem::invTransform(), render(), QwtPlotItem::transform(), and viewBox().

int QwtPlotSvgItem::rtti () const [virtual]

Returns:

QwtPlotItem::Rtti_PlotSVG

Reimplemented from QwtPlotItem.

Definition at line 89 of file qwt_plot_svgitem.cpp.

void QwtPlotSvgItem::render (QPainter * painter, const QwtDoubleRect & viewBox, const QRect & rect) const [protected]

Render the SVG data

Parameters:

painter Painter
viewBox View Box, see QSvgRenderer::viewBox
rect Traget rectangle on the paint device

Definition at line 194 of file qwt_plot_svgitem.cpp.

Referenced by draw().

QwtDoubleRect QwtPlotSvgItem::viewBox (const QwtDoubleRect & rect) const [protected]

Calculate the viewBox from an rect and boundingRect().

Parameters:

rect Rectangle in scale coordinates

Returns:

viewBox View Box, see QSvgRenderer::viewBox

Definition at line 254 of file qwt_plot_svgitem.cpp.

References boundingRect(), QwtScaleMap::setPaintInterval(), QwtScaleMap::setScaleInterval(), and QwtScaleMap::xTransform().

Referenced by draw().

Author

Generated automatically by Doxygen for Qwt User's Guide from the source code.