[racket] Slideshow on secondary monitor

At Mon, 18 Jul 2011 13:38:42 -0600, Matthew Flatt wrote:
> At Mon, 18 Jul 2011 02:54:12 -0300, Rodolfo Carvalho wrote:
> > Does anybody know of a way to tell Slideshow to run fullscreen on a
> > secondary monitor?
> 
> Slideshow doesn't know how to do that, currently. I'll look into adding
> that feature.

Slideshow now supports an `-M' command-line argument to pick a monitor.

The `racket/gui' library now understands multiple monitors: the
`get-display-size' and `get-display-left-top-inset' functions accept a
`#:monitor' optional argument, and a new `get-display-count' function
reports the number of monitors.

On Unix, `get-display-size' now reports the main monitor's size by
default, instead of the virtual screen size. Multiple-monitor support
for Unix/X11 assumes Xinerama (i.e., multiple monitors on a single X11
screen, as opposed to multiple X11 screens).