How to implement this ejecting and withdrawing portion of a window like a drawer?

How to implement following effect with Cocoa:

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User can eject and withdraw right portion of window with a button.

Update: How to draw th开发者_开发问答e vertical line in the tool bar?

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This is actually part of the window. When you click the button, the window and view just resize into their appropriate positions.

Check out NSViewAnimation.