Hi Jose,
Jose manuel Hernando Cobeña wrote:
-hello, I need to create a list of Colors, and I like do this:
list_colors <- varGet vColors
....
color_red <- checkBox p [text := "Red", checked := False, on command
:= do aux red list_colors ]
....
where
aux one_color list_colors =
if (elem one_color list_colors)
then do
varSet vColors (delete one_color list_colors)
else do
varSet vColors (red:list_colors)
but the variable vColors no change and I can not create de list of colors.
You should pass the variable to the helper function -- not its value.
ie. this should work better:
...
colorRed <- checkBox p [text := "Red", on command := onRed red vColors]
...
where
onRed color vColors
= vColors [value :~ \colors -> if (color `elem` colors)
then .. else color:colors]
I hope this helps,
-- Daan.
ps. It is better to send wxHaskell related questions to
the [EMAIL PROTECTED] mailing list
instead of the Haskell list.
Thanks
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