Premade Cocoa component for a UI control like this? (rounded rectangle showing a stack of items)

Question

Update

Luckily, the code that WebKit uses to make this control draws onto a canvas using basic drawing operations, so it shouldn't be too hard to convert into a Cocoa control. This is what I have so far:

I'll update here again once I get it finished.

Original question

I don't know what to call this sort of control, so I'll show pictures (from the iTunes dialog for a media player and the WebKit Web Inspector's Resource panel):

I'm interested in using this sort of control in my Cocoa application. I've searched all over the Internets but haven't found much, seeing as I don't know its name - is there some sort of shared component that I can use for this?

Thanks!

Answer 1

That's a totally custom control, and I don't know of any open source counterpart (other than the one inside the Webkit source). Would you care to provide one? :)

Answer 2

On Safari it's implemented using javascript, see: SummaryBar.js.