Re: [wxhaskell-users] Variable not in scope at examples-compilation

[Lennart K. <kol...@dt...>]

Benjamin Krupp wrote:

> I am interested in Haskell mainly because of wxHaskell. So my 
> situation is that I know little about Haskell and little about 
> wxHaskell but want to learn both as fast as possible.
>
> After downloading and installing ghc-6.0.1 and wxhaskell-0.4 (.dmg 
> version for mac - I'm using Mac OS X 10.2.8 Jaguar) I tried to compile 
> the examples in the wx, wxcore and contrib-directorys. Some worked 
> fine (contrib: Camels.hs, wx: BouncingBalls.hs, HelloWorld.hs, 
> Minimal.hs, TimeFlows.hs, wxcore: ByeDemo.hs, ImageViewer.hs, 
> Paint.hs) others not. The errors I got looked like this:
>
>     Layout.hs:18: Variable not in scope: `alignment'
>     Layout.hs:19: Variable not in scope: `alignment'
>
wxHaskell 0.4 is old, close to antique (about 2 years old now). I don't 
know if it's the source of your problems but will probably have better 
luck with a newer version. It might be a good idea to upgrade any way. 
There exists .dmg-version for wxHaskell 0.9.4, which is the latest 
released, both for ghc 6.2.2 and 6.4.
http://wxhaskell.sourceforge.net/download.html

Cheers,
  Lennart

> But when I tried to help myself the dirty way (remove the 
> alignment-assignments) I got the following errors:
>
>     Layout.hs:18:
>         Couldn't match `IO' against `(->) [Prop (TextCtrl ())]'
>             Expected type: IO t
>             Inferred type: [Prop (TextCtrl ())] -> IO (TextCtrl ())
>         Probable cause: `textEntry' is applied to too few arguments in 
> the call
>             (textEntry p [text := "100"])
>         In a 'do' expression: xinput <- textEntry p [text := "100"]
>
> This is how I called ghc from the shell:
>
>     ghc -package wx -o layout Layout.hs
>
> What's my fault (except from my dirty methods and my impatience)?
>
>     bened
>
>
>
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