[wxhaskell-users] Stop do not stop; not multi-threaded?

[<jmv...@gm...>]

Hi

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I=92m running a program with a graphical interface in wxHaskell.=20

My program have one button that starts a sometimes very long computation
that even could get cyclic in some cases. I created a Stop button that =
when
pressed changes the State of the application (type State =3D Var =
MyRecordType
from =
http://wxhaskell.sourceforge.net/doc/Graphics.UI.WX.Types.html#t%3AVar
). Then my very long computation, before calling the recursive call, =
checks
if the State is saying to continue or stop.

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In theory this seems the solution but when I tested it I find out that =
it
doesn=92t. The very long computation gets the attention of the processor =
and
blocks the graphical interface; clicking the Stop button don=92t fire =
the
actions.

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I=92m not sure but is this running sequencially? Which ways have I to =
overcome
this block?

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Best

Miguel=20

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