Variables bound in the do block are not in scope in the where.
Use a let inside the do for onOpen instead.
On Thu, Apr 16, 2009 at 11:53 PM, Tsunkiet Man
Hello,
I'm trying to create a GUI by using wxHaskell. However I get the weird error message of "Not in scope "dt"", well so I sorted them so that my so called "dt" was in scope, however it failed. Can someone please tell me how I can solve this error?
... A lot of code that is not relevant in my opinion, if I'm wrong please correct me and I will post my full code
--Debug text -- dt <- staticText f [text := "Hello world!"]
imagePanel <- panel f [position := Point 2 2, clientSize := Size 100 100, tooltip := "This is a drawPanel", bgcolor := rgb 255 255 255] set f [ clientSize := Size 700 500, menuBar := [mFile, mHelp], visible := True, on (menu exit) := close f, on (menu open) := onOpen f vFile ]
return ()
where onOpen :: Frame a -> Var b -> IO () onOpen frame var = do file <- fileOpenDialog frame False True "Open File" [("PGM bestanden (*.pgm)",["*.pgm"]),("Alle bestanden (*.*)",["*.*"])] "" "" case file of Nothing -> return () Just file -> set dt [text := "HELLO"] return ()
Thank you for your help, I really owe haskell-cafe.
Greetings Tsunkiet Man _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe