OK, I will have to use another gesture. My goal is to build something like the "grouping" functionality in PowerPoint/Word/etc.
The vocabulary I have in mind is "n" - -adds a new square to the canvas, at the mouse point mouse-down mouse-up -- selects the current shape mouse-down "a" -- adds the current shape to the current selection "g" -- turns the shapes in the current selection into a single shape "u" -- ungroups the shapes in the current selection Do you see anything problematic there? --Mitch On Thu, Mar 14, 2013 at 10:46 PM, Matthias Felleisen <matth...@ccs.neu.edu>wrote: > > No. And what you got is a coincidence. big-bang wasn't designed with > these subtleties in mind. Quite the opposite, the original intent was to > move people on to Racket's real GUI toolbox. It just so happens that people > use big-bang and universe far beyond the original intent. -- Matthias > > > > On Mar 14, 2013, at 10:42 PM, Mitchell Wand wrote: > > OK, it's quicker to experiment: > > On my windows 7 machine in racket 5.3.3, holding the shift key followed by > a wheel down yields the sequence "shift" "wheel-down" "shift". > > So the way to detect shift-click and the like is to look for a button-up > FOLLOWED by shift. > > Is there any better way to do this? > > --Mitch > > > On Thu, Mar 14, 2013 at 9:56 PM, Mitchell Wand <w...@ccs.neu.edu> wrote: > >> Does releasing a shift key cause a key event in 2htdp/universe ? I want >> to distinguish between ordinary mouse click and shift click. What I'd like >> is to have a sequence like >> >> keyevent: "shift" (or "rshift") >> mouse-event: button-down [or whatever] >> keyevent: ??? (I release the shift key) >> >> I suppose I could experiment to find out, but it's quicker to ask :) >> >> --Mitch >> >> >> >> >> >> > ____________________ > Racket Users list: > http://lists.racket-lang.org/users > > >
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