Not sure how to get the correct size of Canvas

Hello everyone:

I am not sure how to get the correct size of a Canvas.

When I create the Canvas, it keeps telling me it is 300 x 150.
I get that size if I try to grab it in the onModuleLoad method
or from an attach event. They both keep telling me the Canvas
is 300 x 150.

But when I use a ClickEvent handler, the clicks are for an element
which is 900 x 450.

I tried extending the Canvas into a MyCanvas so I could add code
to the onload method, but its constructor is private so I can't override
it.

I am attaching my sample code.

You can see it running here:
https://dev.3dmathpuzzles.com/3dmp/play.html

Any guidance on this?

Thank you,
Neil

--
Neil Aggarwal, (972) 834-1565, http://www.propfinancing.com
We offer 30 year loans on single family houses!

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