QwtPlotSvgItem(3) Qwt User's Guide QwtPlotSvgItem(3)NAMEQwtPlotSvgItem-
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
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Version 5.2.2 Mon Aug 1 2011 QwtPlotSvgItem(3)
