In our app a user can select an NLineShape connecting two other shapes and do certain things to that line.  The problem is that the slightest movement of the mouse while selecting the line can bump it enough to come unplugged to the shapes it was connected to.

I have noticed that the lineshapes in the designer have a certain amount of “stickyness” where it resists coming unplugged until the line has been drug beyond a certain threshold.  

This is the behaviour I want for my lineshapes but I have not figured out what I need to do.

Is there some kind of threshold property on the line or ports or plugs I need to set?

Thanks in advance,

Jason