desiredSize binding causing issue with PartResized event

The problem is that you are resizing a Shape that is the main element of an “Auto” Panel – the border. That’s not what you want to do. I think you just want to do what the first sample does in GoJS Tools -- Northwoods Software. Because the user will be modifying the desiredSize of the whole Node, you will want to put the TwoWay Binding of “desiredSize” on the whole Node.