How to open a NSWindow with a "popup" animation

Question

I'd like to create something like this window:
http://cl.ly/1m2a2w3P2D20 (click on "view in your browser")

I don't know where to start. Is it a custom "animator" or something like that?
How can Any ideas on how to perform something like this?
Thanks!

Answer 1

On 10.7 and above, if you call -setAnimationBehavior: the window will automatically animate this or several other ways when you -orderFront: or -makeKeyAndOrderFront:. I believe the behavior you want is NSWindowAnimationBehaviorAlertPanel.