Hello again,
and thanks for the quick response. But I am already using the
UpdateManager's thread to perform the change of the viewBox attribute. So
that does not seem to be the problem. I found out, that the update is indeed
done but not correctly and it seems to have something to do with the fact
that I bound the update to the OnScrollAction and/or to the OnZoomAction.
When I scroll (using SHIFT+LMB) it updates only the area that was visible
before the operation. The rest of the windows remains in the canvas'
background-color. Similar effect, when zooming out by using SHIFT+RMB: not
the whole canvas is used for the new view - only the box what used to be the
old viewport is being updated.
The idea for the application is, that the user should get additional
information (that is dynamically loaded from a server) when he scrolls or
zooms to a special area. To ensure, that he notices the added information,
the viewBox attribute is updated, so the updated information is completely
visible.
I pasted a small example below, which shows the problem or you can see where
I am wrong. I also pasted a svg-file, that can be used with the example.
Thank you in Advance,
Kai.
----Java Code----
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import org.apache.batik.swing.JSVGCanvas;
import org.apache.batik.bridge.UpdateManager;
import org.apache.batik.swing.svg.SVGLoadEventDispatcherAdapter;
import org.apache.batik.swing.svg.SVGLoadEventDispatcherEvent;
import org.w3c.dom.events.EventListener;
import org.w3c.dom.Element;
import org.w3c.dom.events.Event;
import org.w3c.dom.events.EventTarget;
import org.w3c.dom.svg.SVGDocument;
public class CanvasScripting {
public static void main(String[] args) {
new CanvasScripting();
}
JFrame frame;
JSVGCanvas canvas;
SVGDocument svgDocument;
UpdateManager um;
public CanvasScripting() {
frame = new JFrame();
canvas = new JSVGCanvas();
canvas.setDocumentState(JSVGCanvas.ALWAYS_DYNAMIC);
canvas.addSVGLoadEventDispatcherListener
(new SVGLoadEventDispatcherAdapter() {
public void svgLoadEventDispatchStarted
(SVGLoadEventDispatcherEvent e) {
svgDocument = canvas.getSVGDocument();
registerListeners();
um = canvas.getUpdateManager();
}
});
frame.addWindowListener(new WindowAdapter() {
public void windowOpened(WindowEvent e) {
canvas.setURI("doc.svg");
}
});
frame.getContentPane().add(canvas);
frame.setSize(800, 600);
canvas.setSize(700,550);
frame.show();
}
public void registerListeners() {
Element elt = svgDocument.getRootElement();
EventTarget t = (EventTarget)elt;
t.addEventListener("click", new OnClickAction(), false);
t.addEventListener("SVGScroll", new OnScrollAction(),
false);
t.addEventListener("SVGZoom", new OnZoomAction(), false);
}
public class OnClickAction implements EventListener{
public void handleEvent(Event evt) {
um.getUpdateRunnableQueue().invokeLater(new
Animation());
}
}
public class OnScrollAction implements EventListener {
public void handleEvent(Event evt) {
System.out.println("OnScrollAction");
um.getUpdateRunnableQueue().invokeLater(new
Animation());
}
}
public class OnZoomAction implements EventListener {
public void handleEvent(Event evt) {
um.getUpdateRunnableQueue().invokeLater(new
Animation());
}
}
public class Animation implements Runnable {
public void run() {
svgDocument.getRootElement().setAttribute("viewBox",
"30 30 30 30");
}
}
}
----SVG File------
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN"
"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd";>
<svg
id="svg909"
xmlns="http://www.w3.org/2000/svg";
viewBox="0 0 50 50">
<defs
id="defs911" />
<rect
style="fill:#ffaac8;"
id="rect1"
width="50"
height="50"
x="0"
y="0" />
<rect
style="fill:#ff0000;"
id="rect1"
width="55"
height="55"
x="49"
y="49" />
</svg>
-----------------
-----Original Message-----
From: Thomas DeWeese [mailto:[EMAIL PROTECTED]
Sent: Montag, 15. November 2004 12:25
To: Batik Users
Subject: Re: Resized viewBox Attribute
Hi Meves,
This should work. I suspect that you need to read the FAQ:
http://xml.apache.org/batik/faqs.html#faq-21
Meves Kai (ext) wrote:
> Hi there,
>
> I'm currently working with a document, that is displayed by a JSVGCanvas
and
> gets modified by my application. There are some elements being added to
the
> document by my application. I'm also changing the documents' viewBox
> attribute by myDoc.getRootElement().setAttribute("viewBox", ...) in order
to
> see the added elements (they are placed outside the current viewBox). But
> the JSVGCanvas seems not to notice the change of the viewBox attribute.
The
> Elements are added correctly and visible if they appear inside the old
> viewBox. When I reload the SVGDocument by JSVGCanvas.setSVGDocument(myDoc)
> all shows up correctly, but since the document is very large I don't want
to
> reload the document every time I add some elements.
>
> Am I doing something wrong or is a change of the viewBox attribute not
> supported?
>
> Thank you in advance,
> Kai.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
