Icon Theme Support

[Richard Bair]

> Sorry about not sending this directly to the list.  I keep tripping over
> the fact that by default it only sends the reply directly to the sender.
> Somebody please fix this.

I'm afraid this is like tabs vs. spaces -- there will always be arguments over it but nothing will ever change :-).

> *<slightly-off-topic>*
> The Less library that Dan pointed out looks particularly interesting.  I
> like that you can dynamically change the style sheet.  One of the things
> that I currently find bothersome is that you can't map arbitrary states to
> pseudo selectors.  Currently you have a pseudo selector like ":hover", but
> it would be nice if the developer could map any state or combination of
> states to a style.
> *</slightly-off-topic>*

The reason we didn't allow for arbitrary pseudo classes was because the implementation was slower and the heuristics a harder to implement (which is also why we don't support selectors based on arbitrary property values). But in 8 the plan was to expose API so any subclass of Node could define its own set of supported pseudo classes.