[bembleton]

This doesn't seem to do anything other than update the display of the ZoomPanel temporarily. I did this:
override void StartAnimation(...) { viewbox.Viewbox = to; }
override void StopAnimation() {}

But the next time I check zoomPanel.Viewbox or ZoomFactor, they still have the original values before calling the zoom functions, so it looks like the base.StartAnimation method is doing more than just setting the viewbox.Viewbox property. Is there anything else I should be doing?

Thanks again