[Haskell-cafe] FFI and callbacks

[Gracjan Polak]

Duncan Coutts wrote:
> 
> Most toolkits with a main loop system allow you to setup timers. In the
> Gtk2Hs bindings we can use this trick:
> 
> -- 50ms timeout, so GHC will get a chance to scheule about 20 times a second
> -- which gives reasonable latency without the polling generating too much
> -- cpu load.
> timeoutAddFull (yield >> return True) priorityDefaultIdle 50
>

Just for the record, above line in wxHaskell is spelled as:

timer mainWindow [ interval := 50, on command := return () ]

By the way, thanks for this tip! This helped me to work around 
showstopper bug in my program :)

-- 
Gracjan