Helper function that creates a default "pan by" handler.
The resulting pan by handler takes in a delta that is in "stage/context/world" space.
The default pan by handler will first restrict the pan by the view port, then clamp the pan by the boundaries, and then pan by the delta.
Helper function that creates a default "pan by" handler. The resulting pan by handler takes in a delta that is in "stage/context/world" space. The default pan by handler will first restrict the pan by the view port, then clamp the pan by the boundaries, and then pan by the delta.