Advice on making multiple windows in Xcode...

Hey in all my previous applications I've only needed one window and I put practically all my code in a single NSView. This NSView controlled everything, received all input, and did the drawing. All in one nice and neat .h and .m file.

Now I'm making multiple windows and am a bit worried. How should I set it up? Should I put all my logic code in the delegate and have individual drawing code in each window? How will the drawing code access the logic to know what to draw?
Can I somehow connect both windows and all things it contains to the delegate so the delegate can use logic and manipulate the NSViews to draw stuff?


Thanks,
Matt