Possible threading bug with a resized event

Hi!

Let me introduce a problem first. I'm creating a library with
custom-animated SVG images. The most animations implemented by dynamic
DOM modifications are handled by Batik pretty well, but some are not.
There are some cases (see applied example) when it is impossible to
identify what elements need to be repainted upon dynamically changing
a DOM. The most "elegant" decision I found to eliminate this problem
is to force a complete GVT tree rebuild by removing and adding back a
root element of SVG document. This cause a repaint of the entire SVG,
capturing all DOM changes and showing correct image on the canvas.
But there is another problem appeared. After the canvas image is
"refreshed" by removing/adding the root element, resizing the canvas
occasionally cause paint transformation to break. The image became
misplaced.
The applied example visually demonstrates this situation. There is a
frame with a rotating knob.
When the "Root replace" check box is disabled, no actions are
performed except setting a transform attribute of appropriate nodes.
Batik handle changes automatically and the knob is rotated, but you
can see the shadow is not rotated.
When the "Root replace" is enabled, the remove/add root node operation
is performed each animation frame. In this case the animation is
perfect.
Now, with enabled "Root replace" press the bottom 'Send "resized"
event' button. This will send the 'COMPONENT_RESIZED' event to
JSVGCanvas. Bang: the image will slightly move out of the drawing
canvas!

Finally, when you played enough with the animation), here are my questions:

1. Is it acceptable to remove and add the SVG document root element to
make all DOM-modifications visible?
2. Any ideas to avoid image jumping with "add/remove refresh" and a
resized event (if it is a bug)?

PS: I used Batik 1.7 and 1.8pre with the same result.

Thanks.


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