[Lispweb] IMHO: popup-list
mdanish at andrew.cmu.edu
Mon Feb 25 22:34:01 CST 2002
On Mon, Feb 25, 2002 at 10:12:14PM -0500, Erik Enge wrote:
> Hi, gang.
> I want to use the popup-list form-element IMHO offers. In the
> documentation of the initarg items, it says:
> assoc list, or function returning alist, of items appearing
> in the list
> Fine. So, I assume, then, that this should work:
> (defun some-items ()
> '(("1" . ("2" . ()))))
> :type popup-list
> :initargs (:items #'some-items))
> However, I get the error message:
> Type-error in KERNEL::OBJECT-NOT-LIST-ERROR-HANDLER:
> FUNCTION is not of type LIST
> From the source (form-elements.lisp) I can tell that one does not even
> look to see if the slot items can contain a function and assumes it is
> a list (which explains the error).
> So, which is right, documentation or code? Patches accepted?
Code, of course =)
I've always used a-lists of the form
((:item-1 "Item 1") (:item-2 "Item 2") ...)
and never had trouble with it. Your example a-list doesn't look like one,
As for patching, feel free to write your own version of it--copying code
as necessary. Sometimes I simply redefine symbols in the IMHO package
when I find a bug, to have a fixed version quickly (and then I send a patch
in); though there's no reason not to simply create another html-element
derived class in this case...
You probably only have to override the render-html method though.
; Matthew Danish <mdanish at andrew.cmu.edu>
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