Qwt User's Guide

NAME¶

QwtPlotSvgItem -

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

SYNOPSIS¶

#include <qwt_plot_svgitem.h>

Inherits QwtPlotItem.

Public Types¶

enum ItemAttribute { Legend = 1, AutoScale = 2 }

enum RenderHint { RenderAntialiased = 1 }

enum RttiValues { Rtti_PlotItem = 0, Rtti_PlotGrid, Rtti_PlotScale, Rtti_PlotMarker, Rtti_PlotCurve, Rtti_PlotHistogram, Rtti_PlotSpectrogram, Rtti_PlotSVG, Rtti_PlotUserItem = 1000 }

Public Member Functions¶

void attach (QwtPlot *plot)

virtual QwtDoubleRect boundingRect () const

void detach ()

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

void hide ()

QwtDoubleRect invTransform (const QwtScaleMap &, const QwtScaleMap &, const QRect &) const

bool isVisible () const

virtual void itemChanged ()

virtual QWidget * legendItem () const

bool loadData (const QwtDoubleRect &, const QByteArray &)

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

QRect paintRect (const QwtScaleMap &, const QwtScaleMap &) const

QwtPlot * plot () const

QwtPlotSvgItem (const QwtText &title)

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

virtual int rtti () const

QwtDoubleRect scaleRect (const QwtScaleMap &, const QwtScaleMap &) const

void setAxis (int xAxis, int yAxis)

void setItemAttribute (ItemAttribute, bool on=true)

void setRenderHint (RenderHint, bool on=true)

void setTitle (const QString &title)

void setTitle (const QwtText &title)

virtual void setVisible (bool)

void setXAxis (int axis)

void setYAxis (int axis)

void setZ (double z)

void show ()

bool testItemAttribute (ItemAttribute) const

bool testRenderHint (RenderHint) const

const QwtText & title () const

QRect transform (const QwtScaleMap &, const QwtScaleMap &, const QwtDoubleRect &) const

virtual void updateLegend (QwtLegend *) const

virtual void updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &)

int xAxis () const

int yAxis () const

double z () const

virtual ~QwtPlotSvgItem ()

Protected Member Functions¶

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

QwtDoubleRect viewBox (const QwtDoubleRect &area) const

Detailed Description¶

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

SVG images are often used to display maps

Member Enumeration Documentation¶

enum QwtPlotItem::ItemAttribute [inherited] Plot Item Attributes¶

•: Legend

The item is represented on the legend.

•: AutoScale

The boundingRect() of the item is included in the autoscaling calculation.

See also:

setItemAttribute(), testItemAttribute()

enum QwtPlotItem::RenderHint [inherited]¶

Render hints.

enum QwtPlotItem::RttiValues [inherited]¶

Runtime type information. RttiValues is used to cast plot items, without having to enable runtime type information of the compiler.

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

QwtPlotSvgItem::~QwtPlotSvgItem () [virtual]¶

Destructor.

Member Function Documentation¶

void QwtPlotItem::attach (QwtPlot *plot) [inherited]¶

Attach the item to a plot. This method will attach a QwtPlotItem to the QwtPlot argument. It will first detach the QwtPlotItem from any plot from a previous call to attach (if necessary). If a NULL argument is passed, it will detach from any QwtPlot it was attached to.

Parameters:

plot Plot widget

See also:

QwtPlotItem::detach()

QwtDoubleRect QwtPlotSvgItem::boundingRect () const [virtual]¶

Bounding rect of the item.

Reimplemented from QwtPlotItem.

void QwtPlotItem::detach () [inline, inherited]¶

This method detaches a QwtPlotItem from any QwtPlot it has been associated with. detach() is equivalent to calling attach( NULL )

See also:

attach( QwtPlot* plot )

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.

void QwtPlotItem::hide () [inherited]¶

Hide the item.

QwtDoubleRect QwtPlotItem::invTransform (const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRect &rect) const [inherited] Transform a rectangle from paint to scale coordinates¶

Parameters:

xMap X map

yMap Y map

rect Rectangle in paint coordinates

Returns:

Rectangle in scale coordinates

See also:

transform()

bool QwtPlotItem::isVisible () const [inherited] Returns:¶

true if visible

See also:

setVisible(), show(), hide()

void QwtPlotItem::itemChanged () [virtual, inherited] Update the legend and call QwtPlot::autoRefresh for the parent plot.¶

See also:

updateLegend()

QWidget * QwtPlotItem::legendItem () const [virtual, inherited]¶

Allocate the widget that represents the item on the legend. The default implementation is made for QwtPlotCurve and returns a QwtLegendItem(), but an item could be represented by any type of widget, by overloading legendItem() and updateLegend().

Returns:

QwtLegendItem()

See also:

updateLegend() QwtLegend()

Implements QwtLegendItemManager.

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

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

QRect QwtPlotItem::paintRect (const QwtScaleMap &xMap, const QwtScaleMap &yMap) const [inherited]¶

Calculate the bounding paint rect of 2 maps. Parameters:

xMap X map

yMap X map

Returns:

Bounding rect of the scale maps

QwtPlot * QwtPlotItem::plot () const [inherited]¶

Return attached plot.

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

int QwtPlotSvgItem::rtti () const [virtual] Returns:¶

QwtPlotItem::Rtti_PlotSVG

Reimplemented from QwtPlotItem.

QwtDoubleRect QwtPlotItem::scaleRect (const QwtScaleMap &xMap, const QwtScaleMap &yMap) const [inherited]¶

Calculate the bounding scale rect of 2 maps. Parameters:

xMap X map

yMap X map

Returns:

Bounding rect of the scale maps

void QwtPlotItem::setAxis (intxAxis, intyAxis) [inherited] Set X and Y axis¶

The item will painted according to the coordinates its Axes.

Parameters:

xAxis X Axis

yAxis Y Axis

See also:

setXAxis(), setYAxis(), xAxis(), yAxis()

void QwtPlotItem::setItemAttribute (ItemAttributeattribute, boolon = true) [inherited] Toggle an item attribute¶

Parameters:

attribute Attribute type

on true/false

See also:

testItemAttribute(), ItemAttribute

void QwtPlotItem::setRenderHint (RenderHinthint, boolon = true) [inherited] Toggle an render hint¶

Parameters:

hint Render hint

on true/false

See also:

testRenderHint(), RenderHint

void QwtPlotItem::setTitle (const QString &title) [inherited] Set a new title¶

Parameters:

title Title

See also:

title()

void QwtPlotItem::setTitle (const QwtText &title) [inherited] Set a new title¶

Parameters:

title Title

See also:

title()

void QwtPlotItem::setVisible (boolon) [virtual, inherited] Show/Hide the item¶

Parameters:

on Show if true, otherwise hide

See also:

isVisible(), show(), hide()

void QwtPlotItem::setXAxis (intaxis) [inherited] Set the X axis¶

The item will painted according to the coordinates its Axes.

Parameters:

axis X Axis

See also:

setAxis(), setYAxis(), xAxis()

void QwtPlotItem::setYAxis (intaxis) [inherited] Set the Y axis¶

The item will painted according to the coordinates its Axes.

Parameters:

axis Y Axis

See also:

setAxis(), setXAxis(), yAxis()

void QwtPlotItem::setZ (doublez) [inherited]¶

Set the z value. Plot items are painted in increasing z-order.

Parameters:

z Z-value

See also:

z(), QwtPlotDict::itemList()

void QwtPlotItem::show () [inherited]¶

Show the item.

bool QwtPlotItem::testItemAttribute (ItemAttributeattribute) const [inherited] Test an item attribute¶

Parameters:

attribute Attribute type

Returns:

true/false

See also:

setItemAttribute(), ItemAttribute

bool QwtPlotItem::testRenderHint (RenderHinthint) const [inherited] Test a render hint¶

Parameters:

hint Render hint

Returns:

true/false

See also:

setRenderHint(), RenderHint

const QwtText & QwtPlotItem::title () const [inherited] Returns:¶

Title of the item

See also:

setTitle()

QRect QwtPlotItem::transform (const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QwtDoubleRect &rect) const [inherited] Transform a rectangle¶

Parameters:

xMap X map

yMap Y map

rect Rectangle in scale coordinates

Returns:

Rectangle in paint coordinates

See also:

invTransform()

void QwtPlotItem::updateLegend (QwtLegend *legend) const [virtual, inherited]¶

Update the widget that represents the item on the legend. updateLegend() is called from itemChanged() to adopt the widget representing the item on the legend to its new configuration.

The default implementation is made for QwtPlotCurve and updates a QwtLegendItem(), but an item could be represented by any type of widget, by overloading legendItem() and updateLegend().

Parameters:

legend Legend

See also:

legendItem(), itemChanged(), QwtLegend()

Implements QwtLegendItemManager.

Reimplemented in QwtPlotCurve.

void QwtPlotItem::updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &) [virtual, inherited]¶

Update the item to changes of the axes scale division. Update the item, when the axes of plot have changed. The default implementation does nothing, but items that depend on the scale division (like QwtPlotGrid()) have to reimplement updateScaleDiv()

Parameters:

xScaleDiv Scale division of the x-axis

yScaleDiv Scale division of the y-axis

See also:

QwtPlot::updateAxes()

Reimplemented in QwtPlotGrid, and QwtPlotScaleItem.

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

int QwtPlotItem::xAxis () const [inherited]¶

Return xAxis.

int QwtPlotItem::yAxis () const [inherited]¶

Return yAxis.

double QwtPlotItem::z () const [inherited] Plot items are painted in increasing z-order.¶

Returns:

setZ(), QwtPlotDict::itemList()

Author¶

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

Mon Aug 1 2011

Version 5.2.2

Source file:	QwtPlotSvgItem.3.en.gz (from libqwt5-doc 5.2.2-3)
Source last updated:	2012-05-16T15:00:00Z
Converted to HTML:	2017-06-07T16:48:54Z