Hi Yasmin,
[EMAIL PROTECTED] wrote on 02/28/2006 05:00:41 PM:
> Sorry, should had given the complete code, so you can see:
>
> canvas.setDocumentState(JSVGCanvas.ALWAYS_DYNAMIC);
>
> canvas.getUpdateManager().getUpdateRunnableQueue().invokeLater(new
> Runnable() {
The UpdateManager and RunnableQueue only become available after the
first
rendering completes. Alternately you could put your code to create the
Circles in the SVG onload event callback. There are good examples in the
JavaScripting and JSVGCanvas sections of the Batik web site that covers
how
to do this (I would tend towards registering an 'onload' event handler).
http://xmlgraphics.apache.org/batik/javaScripting.html
http://xmlgraphics.apache.org/batik/svgcanvas.html
>
> public void run()
> {
> SVGDocument doc = canvas.getSVGDocument();
> String SVGNS = "http://www.w3.org/2000/svg";;
> Iterator i = spots.iterator();
> Element g; // =
doc.getElementById("circleGroup");
> g = doc.createElementNS(SVGNS,"g");
> g.setAttributeNS(null, "id", "circleGroup");
> doc.getRootElement().appendChild(g);
>
> while (i.hasNext())
> {
> Point2D pt2d = (Point2D) i.next();
> Element e =
doc.createElementNS(SVGNS,"circle");
> e.setAttributeNS(null,"cx",""+pt2d.getX());
> e.setAttributeNS(null,"cy",""+pt2d.getY());
> e.setAttributeNS(null,"r","8");
> e.setAttributeNS(null,"fill","Red");
> g.appendChild(e);
> }
> }
> });
>
> Many thx
>
> yasmin
>
>
> > Hi Yasmin,
> >
> > [EMAIL PROTECTED] wrote on 02/28/2006 03:37:12 PM:
> >
> >> ...yes you are right I haven't created a group with attribute 'id'
set
> > to
> >> 'circlegroup', not sure how to :( I'm a complete novice to SVG and
have
> >> embarked on this ambitiouse project I'm finding it very difficult and
> > time
> >> is running out, pls ELP!
> >
> > I would add something like:
> >
> > if (g == null) {
> > g = doc.createElementNS(SVGNS,"g");
> > g.setAttributeNS(null, "id", "circleGroup");
> > doc.getRootElement().appendChild(g);
> > }
> >
> > Right after you call getElementById.
> > In your case you could probably also just skip the
> > 'getElementById' and 'if' and just create the element in all cases
> > (but you should avoid creating it twice - it's bad to have two
> > elements with the same 'id' in one document).
> >
> > BTW If at some point you want to remove the group (and
> > consiquently all it's children) you can use:
> > g.getParentNode().removeChild(g);
> >
> > Good luck!
> >
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> >
> >
> >
>
>
>
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