How to keep a panel from dragging offscreen?

[heliosprime]

I have a panel that has been made draggable.   How do I keep the panel from being allowed to be dragged offscreen?  I'd like to enforce the panel to always have at least X pixels onscreen.  Ideally, if it is dragged too far, I'd like to have it spring back on screen within the set bounds.  I can't seem to figure out where in the UIDraggablePanel script to check the bounds.

Thanks in advance for any hints.

[dlewis]

There is a bool on the inspector which is 'keep inside bounds' or something. If that is ticked then the contents will stay within the clipping area of the panel (must be clipped)