On Sun, Jul 3, 2011 at 5:16 PM, Jason Dagit
Hello,
I have a GUI program that when I compile it and run it there are no problems. When I load it into GHCI and type, "main", it loads the main window but there are no window decorations and the program hangs to the point where I have to kill the ghci process. You see a spinning cursor when you mouse over the window.
I found this old email regarding gtk2hs: http://web.archiveorange.com/archive/v/nDNOvMeDATtTGn026lbI
I recompiled the program to use -threaded but the behavior is unchanged (if the email above describes my problem then I expected the compiled version to start having issues).
On second though, I think this *IS* a threading issue. Depending on where I add either forkIO or forkOS in main the compiled program either behaves the same as it does in ghci or it segfaults. I don't know how to fix it, but I suspect that I have to do something like what is described here: http://www.cocoabuilder.com/archive/cocoa/292830-nstimer-not-working-in-mult... I think the issue is that when I run the GUI code one a thread that isn't the original thread then I need to explicitly call that threads run loop. The above link points at this bit of documentation and I probably need to read it to develop a better understanding: http://developer.apple.com/library/mac/#documentation/cocoa/conceptual/Multi... Jason