Re:Re: widget-create 'menu-choice

[Mortimer Cladwell <mbcladwell@yahoo.com>]

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Your suggestion evaluates to:

((item "human") (item "rat") (item "mouse"))

which when inserted into a form results in the error:

widget-create: Invalid function: (item "human")

Evaluations that would work are:

'(item "human") '(item "rat") '(item "mouse")
OR 

(quote (item "human"))  (quote (item "rat")) (quote (item "mouse"))

Note that there are no enclosing parenthesis around the list.
Thanks
Mortimer-----------------------------------------------------------------

Mortimer Cladwell wrote: 
Hi,
>I would like to dynamically populate a dropdown widget from a database. the 'menu-choice widget looks like
>(widget-create 'menu-choice
>:tag "Select Host Species"
>:value "unknown"
>:notify (lambda (widget &rest ignore)
>(setq host-species (widget-value widget)))
>'(item "human")
>'(item "rat")
>'(item "mouse"))
>Suppose I can generate a list '( "human "rat" "mouse") from the database. How to create
>'(item "human")
>'(item "rat")
>'(item "mouse")
>on the fly? The closest I can come is
>(progn
>(setq var '( "human" "rat" "mouse"))
>(mapcar '(lambda (a) `'(item ,a)) var)
>) 

i.e.

(let ((var '("human" "rat" "mouse")))
  (mapcar (lambda (label) (list 'item label))
          var))

--
Kevin Rodgers
Denver, Colorado, USA


      

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