Comment #9 on issue 894 by benjamin...@gmail.com: Roassal revised ROSelection and example http://code.google.com/p/moose-technology/issues/detail?id=894
I'm not sure. I think I remember Alex integrating my contribution for CTRL and SHIFT key modifiers to do the multiple selection, but there is no record here, and its too long ago (wow! has it been that long). As far as I know the issue of resetting the selection to empty by clicking on the background (point 1. above) has not been addressed.
I think the multiple-selection would be a really good feature for Roassal, however... * I haven't been very attentive to it. I plan to have it in my application but its on the backburner until I finish a few other things. * I think Roassal has moved on a lot since then, so I'm not sure how much love it will need now.
So perhaps for now it should be closed again. Once I get my dissertation submitted, I plan to move my application to latest Moose. Then this will probably arise again, but I can open a new issue at that time once I have something more definite and time to assist.