Re: [Gtk2hs-devel] web stuff: confining "forward" / "back" links to the current category

[Evan M. <ev...@go...>]

On 7/24/05, Duncan Coutts <dun...@wo...> wrote:
> I was asking people on IRC for some feedback on an article I just added
> on writing multi-threaded GUIs with Gtk2Hs:
> http://haskell.org/gtk2hs/archives/2005/07/24/writing-multi-threaded-guis=
/

When I first started learning about Haskell's IO system the GTK
threading requirement is one of the first things I thought of.  On
Windows, as I recall, it's not only that GTK isn't thread safe but
it's also that fundamentally the way the Windows event loop works and
how GTK uses it that you just can't do GUI operations from external
threads.  (At least, this is my vague memory -- please don't quote me
on it. :P)

Without thinking about it too hard at least, you could imagine having
all GTK operations that are performed in callbacks just feed their IO
actions into a queue that the "main" thread executes.

I guess now that I write that you'd want to give them a different
type, like GtkIO, and then it'd complicate the types of functions...
I haven't really thought it fully through, nor do I understand how
Haskell IO "really" works, so it won't hurt my feelings if you tell me
this is a stupid idea.  :)