Re: [Haskell-cafe] wxHaskell: convenience functions
Actually, I can see how my requirement of not wanting to pass in cbEdit
might not be so good. From an FP point of view, that's just asking for
trouble. A better solution would appear to be to put the cbEdit in as a
parameter, and just face the fact that all callers will be required to
pass an extra parameter.
Mark Carter wrote:
>
>
> I'm experimenting with wxHaskell, and I've got something like:
>
> main = run mainFrame
>
> mainFrame = do -- main application frame
> ...
> cbEdit <- checkBox p1 [text := "Edit Mode", on command ::=
onCbEdit textlog]
> ...
> where
> ...
>
> It would be useful to have some convenience function, let's say,
isEditing, which works out whether cbEdit is checked, or not. That way,
one could just pass this in as a parameter without requiring any extra
code. The problem is, I can't see how it can be done. I've tried various
things in the main section, and nothing worked. I tried putting the
following defintion into the where clause:
>
> isEditing = do
> checkedp <- get cbEdit checked
> return checkedp
>
> but the compiler complained that cbEdit is not in scope. I /could/
pass in cbEdit as a parameter to isEditing, but I'd rather not.
>
>
>
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