GWTCanvas's strange behavior : timer driven animation frozen when move the mouse. (in IE, also happen when directly write vml markups)

[Revv]

PROBLEM DESCRIPTION: In IE, even simple shape(meaning very short path
string) drawn with large pixel coordinate(meaning large shape), the
animation get frozen when I keep moving the mouse over the shape.

SOFTWARE: IE or host mode GWT Browser

HARDWARE: AMD Dual-core 2GHz

ATTACK THE PROBLEM: There are two possibilities why this kind of
things happen: 1) google do a not so good wrapper upon VML and/or 2)
M
$ make a not so good markup language.
Here is the experiment and result (both GWTCanvas code and directly
written VML code behave
the same way ):
1. make small(the size of the shape) and simple(the path string is
short) shape: animation is fast without any doubt, even when keeping
mouse moving.
2. make small and complex shape:animation is fast, even when keeping
mouse moving.
3. make large and simple shape: animation is fast, but when keeping
mouse moving over the shape, the animation stop.

At last, it turn out to be the problem of M$. What puzzle me: what do
the mouse-move event have to do with the timer event for the
animation. There are two guesses:
1) mousemove event is of more priority than timer event in IE.
2) When mousemove event trigged, IE will do some time-consuming things
(specially when the shape is large) even you didn't write any code in
javascript(or GWT's event handling function) to handle the event.

Does anyone have any idea about this strange behavior of IE.

[Emily Crutcher]

Could you create a in issue for this problem here:
   http://code.google.com/p/google-web-toolkit-incubator/issues/entry

Thanks!

     Emily

--
"There are only 10 types of people in the world: Those who understand binary, and those who don't"

[Revv]

OK, done! Check it here: http://code.google.com/p/google-web-toolkit-incubator/issues/detail?id=204

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