Appreciate your response.
However my problem is a bit different. User have buttons to move around.
So I move to the right and the most right shape is in the center of screen (first screenshot). And when I press zoom in, I would expect this shape (which was in the middle of screen) to stay in the middle of screen, but it does not (second screenshot).
I cannot use .bringIntoView(), because user might not have any shape selected.
Is there any way to find out coordinates of visible part of diagram on screen to user?
1. <a href="http://imgur.com/UfKU0LQ">http://imgur.com/UfKU0LQ</a>
2. <a href="http://imgur.com/v6Sn04U">http://imgur.com/v6Sn04U</a>