I'm looking for an iPad case. Ideally, I'd like a one-piece thing that I can just slip my iPad into and never take off. Something that will protect the back from scratches but will also protect the screen. Something that will allow me to use the screen (tactically, speaking) while the case is still on it. Like, I don't want some binder-type case that I have to flip open. I don't want some bag/pouch that I have to open and take the iPad out of. I don't want a skin that doesn't cover the screen. And I don't want to have to apply a separate screen protector "film" or whatzit. Does such a thing exist?