Qwt User's Guide 5.2.2
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A plot item, which displays data in Scalable Vector Graphics (SVG) format. More...
#include <qwt_plot_svgitem.h>
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 |
A plot item, which displays data in Scalable Vector Graphics (SVG) format.
SVG images are often used to display maps
enum QwtPlotItem::ItemAttribute [inherited] |
Plot Item Attributes
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.
QwtPlotSvgItem::QwtPlotSvgItem | ( | const QString & | title = QString::null | ) | [explicit] |
Constructor.
Sets the following item attributes:
title | Title |
QwtPlotSvgItem::QwtPlotSvgItem | ( | const QwtText & | title | ) | [explicit] |
Constructor.
Sets the following item attributes:
title | Title |
QwtPlotSvgItem::~QwtPlotSvgItem | ( | ) | [virtual] |
Destructor.
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.
plot | Plot widget |
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 )
void QwtPlotSvgItem::draw | ( | QPainter * | painter, |
const QwtScaleMap & | xMap, | ||
const QwtScaleMap & | yMap, | ||
const QRect & | canvasRect | ||
) | const [virtual] |
Draw the SVG item
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
xMap | X map |
yMap | Y map |
rect | Rectangle in paint coordinates |
bool QwtPlotItem::isVisible | ( | ) | const [inherited] |
void QwtPlotItem::itemChanged | ( | ) | [virtual, inherited] |
Update the legend and call QwtPlot::autoRefresh for the parent plot.
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().
Implements QwtLegendItemManager.
bool QwtPlotSvgItem::loadData | ( | const QwtDoubleRect & | rect, |
const QByteArray & | data | ||
) |
Load SVG data
rect | Bounding rectangle |
data | in SVG format |
bool QwtPlotSvgItem::loadFile | ( | const QwtDoubleRect & | rect, |
const QString & | fileName | ||
) |
Load a SVG file
rect | Bounding rectangle |
fileName | SVG file name |
QRect QwtPlotItem::paintRect | ( | const QwtScaleMap & | xMap, |
const QwtScaleMap & | yMap | ||
) | const [inherited] |
Calculate the bounding paint rect of 2 maps.
xMap | X map |
yMap | X map |
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
painter | Painter |
viewBox | View Box, see QSvgRenderer::viewBox |
rect | Traget rectangle on the paint device |
int QwtPlotSvgItem::rtti | ( | ) | const [virtual] |
Reimplemented from QwtPlotItem.
QwtDoubleRect QwtPlotItem::scaleRect | ( | const QwtScaleMap & | xMap, |
const QwtScaleMap & | yMap | ||
) | const [inherited] |
Calculate the bounding scale rect of 2 maps.
xMap | X map |
yMap | X map |
void QwtPlotItem::setAxis | ( | int | xAxis, |
int | yAxis | ||
) | [inherited] |
Set X and Y axis
The item will painted according to the coordinates its Axes.
xAxis | X Axis |
yAxis | Y Axis |
void QwtPlotItem::setItemAttribute | ( | ItemAttribute | attribute, |
bool | on = true |
||
) | [inherited] |
Toggle an item attribute
attribute | Attribute type |
on | true/false |
void QwtPlotItem::setRenderHint | ( | RenderHint | hint, |
bool | on = true |
||
) | [inherited] |
Toggle an render hint
hint | Render hint |
on | true/false |
void QwtPlotItem::setTitle | ( | const QString & | title | ) | [inherited] |
void QwtPlotItem::setTitle | ( | const QwtText & | title | ) | [inherited] |
void QwtPlotItem::setVisible | ( | bool | on | ) | [virtual, inherited] |
void QwtPlotItem::setXAxis | ( | int | axis | ) | [inherited] |
Set the X axis
The item will painted according to the coordinates its Axes.
axis | X Axis |
void QwtPlotItem::setYAxis | ( | int | axis | ) | [inherited] |
Set the Y axis
The item will painted according to the coordinates its Axes.
axis | Y Axis |
void QwtPlotItem::setZ | ( | double | z | ) | [inherited] |
Set the z value.
Plot items are painted in increasing z-order.
z | Z-value |
void QwtPlotItem::show | ( | ) | [inherited] |
Show the item.
bool QwtPlotItem::testItemAttribute | ( | ItemAttribute | attribute | ) | const [inherited] |
Test an item attribute
attribute | Attribute type |
bool QwtPlotItem::testRenderHint | ( | RenderHint | hint | ) | const [inherited] |
Test a render hint
hint | Render hint |
const QwtText & QwtPlotItem::title | ( | ) | const [inherited] |
QRect QwtPlotItem::transform | ( | const QwtScaleMap & | xMap, |
const QwtScaleMap & | yMap, | ||
const QwtDoubleRect & | rect | ||
) | const [inherited] |
Transform a rectangle
xMap | X map |
yMap | Y map |
rect | Rectangle in scale coordinates |
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().
legend | Legend |
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()
xScaleDiv | Scale division of the x-axis |
yScaleDiv | Scale division of the y-axis |
Reimplemented in QwtPlotGrid, and QwtPlotScaleItem.
QwtDoubleRect QwtPlotSvgItem::viewBox | ( | const QwtDoubleRect & | rect | ) | const [protected] |
Calculate the viewBox from an rect and boundingRect().
rect | Rectangle in scale coordinates |
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.