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
[legend]

List of all members.

Public Types

enum  ItemAttribute {
  Legend = 0x01,
  AutoScale = 0x02
}
typedef QFlags< ItemAttributeItemAttributes
enum  RenderHint { RenderAntialiased = 1 }
typedef QFlags< RenderHintRenderHints
enum  RttiValues {
  Rtti_PlotItem = 0,
  Rtti_PlotGrid,
  Rtti_PlotScale,
  Rtti_PlotMarker,
  Rtti_PlotCurve,
  Rtti_PlotSpectroCurve,
  Rtti_PlotIntervalCurve,
  Rtti_PlotHistogram,
  Rtti_PlotSpectrogram,
  Rtti_PlotSVG,
  Rtti_PlotUserItem = 1000
}

Public Member Functions

void attach (QwtPlot *plot)
virtual QRectF boundingRect () const
void detach ()
virtual void draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &rect) const
virtual void drawLegendIdentifier (QPainter *, const QRectF &) const
void hide ()
bool isVisible () const
virtual void itemChanged ()
virtual QWidget * legendItem () const
bool loadData (const QRectF &, const QByteArray &)
bool loadFile (const QRectF &, const QString &fileName)
QRectF paintRect (const QwtScaleMap &, const QwtScaleMap &) const
QwtPlotplot () const
 QwtPlotSvgItem (const QwtText &title)
 QwtPlotSvgItem (const QString &title=QString::null)
virtual int rtti () const
QRectF scaleRect (const QwtScaleMap &, const QwtScaleMap &) const
void setAxes (int xAxis, int yAxis)
void setItemAttribute (ItemAttribute, bool on=true)
void setRenderHint (RenderHint, bool on=true)
void setTitle (const QwtText &title)
void setTitle (const QString &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 QwtTexttitle () 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 QRectF &viewBox, const QRectF &rect) const
QSvgRenderer & renderer ()
const QSvgRenderer & renderer () const
QRectF viewBox (const QRectF &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 Typedef Documentation

typedef QFlags<ItemAttribute> QwtPlotItem::ItemAttributes [inherited]

Plot Item Attributes.

typedef QFlags<RenderHint> QwtPlotItem::RenderHints [inherited]

Render hints.


Member Enumeration Documentation

enum QwtPlotItem::ItemAttribute [inherited]

Plot Item Attributes

See also:
setItemAttribute(), testItemAttribute()
Enumerator:
Legend  The item is represented on the legend.
AutoScale  The boundingRect() of the item is included in the autoscaling calculation.

enum QwtPlotItem::RenderHint [inherited]

Render hints.

Enumerator:
RenderAntialiased  Enable antialiasing.

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:

Parameters:
title Title

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

Constructor.

Sets the following item attributes:

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:
detach()

QRectF QwtPlotSvgItem::boundingRect (  )  const [virtual]

Bounding rect of the item.

Reimplemented from QwtPlotItem.

void QwtPlotItem::detach (  )  [inherited]

This method detaches a QwtPlotItem from any QwtPlot it has been associated with.

detach() is equivalent to calling attach( NULL )

See also:
attach()

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.

virtual void QwtLegendItemManager::drawLegendIdentifier ( QPainter *  ,
const QRectF &   
) const [inline, virtual, inherited]

QwtLegendItem can display an icon-identifier followed by a text. The icon helps to identify a plot item on the plot canvas and depends on the type of information, that is displayed.

The default implementation paints nothing.

Reimplemented in QwtPlotCurve, QwtPlotHistogram, QwtPlotIntervalCurve, and QwtPlotMarker.

void QwtPlotItem::hide (  )  [inherited]

Hide the item.

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 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 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

QRectF 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 paint rect of the scale maps, normalized

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

Return attached plot.

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 Traget rectangle on the paint device

QSvgRenderer & QwtPlotSvgItem::renderer (  )  [protected]

Returns:
Renderer used to render the SVG data

const QSvgRenderer & QwtPlotSvgItem::renderer (  )  const [protected]

Returns:
Renderer used to render the SVG data

int QwtPlotSvgItem::rtti (  )  const [virtual]

Returns:
QwtPlotItem::Rtti_PlotSVG

Reimplemented from QwtPlotItem.

QRectF 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 scale rect of the scale maps, normalized

void QwtPlotItem::setAxes ( int  xAxis,
int  yAxis 
) [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 ( ItemAttribute  attribute,
bool  on = true 
) [inherited]

Toggle an item attribute

Parameters:
attribute Attribute type
on true/false
See also:
testItemAttribute(), ItemAttribute

void QwtPlotItem::setRenderHint ( RenderHint  hint,
bool  on = true 
) [inherited]

Toggle an render hint

Parameters:
hint Render hint
on true/false
See also:
testRenderHint(), RenderHint

void QwtPlotItem::setTitle ( const QwtText title  )  [inherited]

Set a new title

Parameters:
title Title
See also:
title()

void QwtPlotItem::setTitle ( const QString &  title  )  [inherited]

Set a new title

Parameters:
title Title
See also:
title()

void QwtPlotItem::setVisible ( bool  on  )  [virtual, inherited]

Show/Hide the item

Parameters:
on Show if true, otherwise hide
See also:
isVisible(), show(), hide()

void QwtPlotItem::setXAxis ( int  axis  )  [inherited]

Set the X axis

The item will painted according to the coordinates its Axes.

Parameters:
axis X Axis
See also:
setAxes(), setYAxis(), xAxis()

void QwtPlotItem::setYAxis ( int  axis  )  [inherited]

Set the Y axis

The item will painted according to the coordinates its Axes.

Parameters:
axis Y Axis
See also:
setAxes(), setXAxis(), yAxis()

void QwtPlotItem::setZ ( double  z  )  [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 ( ItemAttribute  attribute  )  const [inherited]

Test an item attribute

Parameters:
attribute Attribute type
Returns:
true/false
See also:
setItemAttribute(), ItemAttribute

bool QwtPlotItem::testRenderHint ( RenderHint  hint  )  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()

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 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, and QwtPlotMarker.

void QwtPlotItem::updateScaleDiv ( const QwtScaleDiv xScaleDiv,
const QwtScaleDiv yScaleDiv 
) [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, QwtPlotScaleItem, QwtPlotSeriesItem< T >, QwtPlotSeriesItem< QwtPoint3D >, QwtPlotSeriesItem< QPointF >, and QwtPlotSeriesItem< QwtIntervalSample >.

QRectF QwtPlotSvgItem::viewBox ( const QRectF &  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()


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