I've seen these added with limited interference for normal door operation and you can still lock it all the way open.
http://www.campingworld.com/shopping...or-closer/1139
Jayco was putting arms on the tops of the exit doors for some years that only allowed the doors to go about 110 deg while open. That type seemed dangerous as the lower point of the door was always hanging out over the site for some little ones to hit their heads. The only plus to having it was that the wind would not blow open the door and slam the side of the camper.
Door Closer
Linear Mode
