class SplitViewController extends ViewController {
	/**
	 * Called when the view controller was loaded on launch.
	 * Use this function to do some additional preparation before the view is shown.
	 * This function will be called once only. If you want to do something everytime before the view is shown, use viewWillAppear().
	 * Since the view is not necessarily going to be shown after this call, no layout is done yet at this step.
	 */
	viewDidLoad() {
		this.splitView = new SplitView();
		this.element.appendChild(this.splitView.element);
		this.allSubviews.push(this.splitView);

		this.viewControllerContainers = [ ];
		for (var i = 0; i < 2; i++) {
			var viewControllerContainer = new ViewControllerContainer();
			if (i == 0) {
				this.splitView.setLeftView(viewControllerContainer);
			}
			else {
				this.splitView.setRightView(viewControllerContainer);
			}
			this.viewControllerContainers.push(viewControllerContainer);
		}

		var leftViewControllerId = this.element.getAttribute("left-view-controller");
		var rightViewControllerId = this.element.getAttribute("right-view-controller");
		
		if (leftViewControllerId) {
			this.setLeftViewController(UIKit.getViewControllerById(leftViewControllerId));
		}
		if (rightViewControllerId) {
			this.setRightViewController(UIKit.getViewControllerById(rightViewControllerId));
		}
	}

	/**
	 * Called everytime before the view is shown.
	 * The layout is already done at this step, so it's safe to use scrollWidth and scrollHeight and what not.
	 */
	viewWillAppear() { }

	/**
	 * Called everytime after the view is shown.
	 */
	viewDidAppear() { }

	/**
	 * Called everytime before the view is hidden.
	 */
	viewWillDisappear() { }

	/**
	 * Called everytime after the view is hidden.
	 */
	viewDidDisappear() { }

	setLeftViewController(viewController) {
		this.leftViewController = viewController;
		this.viewControllerContainers[0].setViewController(viewController);
	}

	setRightViewController(viewController) {
		this.rightViewController = viewController;
		this.viewControllerContainers[1].setViewController(viewController);
	}
}

UIKit.registerViewControllerType(SplitViewController);