Name of Cocoa widget and its Qt equivalent

This is probably a simple question, but it's hard to Google.

What is the name of the widget / way to create a box "coming from under the window" in Cocoa? What I mean is something li开发者_JAVA技巧ke the conversion interface in the Mac OS X Calculator:

And secondly, is there a widget that can do this in Qt?

Thanks

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It's a sheet, as Nathanial says.

Read about how to make one in Qt on Qt/Mac Special Features.

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It's called a "Sheet" in Cocoa.