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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