Core Animation!

Yes, I'm aware that this app doesn't have a real need for animation nor do intend to utilize any. Core Animation does have two great advantages for me: it's fast and it's easy (relatively speaking). It's been about a year since I even looked at CA so I spent much of my day doing some catching up on the basics.

The screenshot posted is more or less a skeleton of where I am now. I do plan on doing left to right tree growth. The size, color and content of the boxes will all definitely change but, after hours of fidgeting around with math, the box positioning looks right. I'm still trying to figure out how CATransform3DRotate works and getting the connecting lines' angles right. One big concern, though, is the size of the view. Currently, its static (and too big, for that matter). Ideally, it should be adjusted to the size of the tree to eliminate unnecessary scroll bars if the tree fits inside the view.