Re: customizing key definitions with Customize

["Lennart Borgman (gmail)" <lennart.borgman@gmail.com>]

Drew Adams wrote:
> Users can customize key definitions by using commands such as `global-set-key'
> or by using functions such as `define-key' in their init files. And `kbd' helps
> them by letting them use external key descriptions. 
> 
> It can sometimes be useful to let users use Customize to update key-binding
> definitions. The `key-sequence' widget added in Emacs 22 is helpful here, but it
> only takes care of the key-sequence part of a binding, not the map part or the
> target command part. Also, defining keys can sometimes mean remapping existing
> commands instead of providing a key sequence to bind, and the `key-sequence'
> widget doesn't apply in that case.
> 
> I've been using a key definition widget as a custom type, to let users of a
> library use only Customize to customize key bindings, if they want. 
> 
> The widget uses a `choice' to let you either specify a key sequence to bind or a
> command to be remapped. Dunno if this is of general interest, but here is what I
> use.
> 
> (define-widget 'key-definition 'lazy
>   "Key definition.

I like the idea, but can't it be taken one step further: Wouldn't it be 
nice with a "sparse-keymap widget"? And then of course 
`customize-sparse-keymap'.

Or have you already done this too, Drew?