Re: widget-create 'menu-choice

[Kevin Rodgers]

Mortimer Cladwell wrote:
> 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")

Ah, I misread the widget-create arguments.  That function's doc string is
practically useless.

> 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.

As Andreas points out, you need apply:

(defvar species '("human" "rat" "mouse"))

(apply 'widget-create
       'menu-choice
       :tag "Select Host Species"
       :value "unknown"
       :notify (lambda (widget &rest ignore)
                 (setq host-species (widget-value widget)))
       (mapcar (lambda (label) (list 'item label))
               species))

--
Kevin Rodgers
Denver, Colorado, USA