/*

 Copyright (C) 2016 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 PhotoSplitViewController allows us to easily access the child controllers as specific types.

*/

import Cocoa

class PhotoSplitViewController: NSSplitViewController {

    // This method is less generic than our protocol-based approach, but sometimes necessary. 

    // Here we assume that at least one child must conform to the desired type; the use of an implicitly-unwrapped optional results in a runtime error if this isn't true.

    var sidebarController: SidebarViewController! {

        return childViewControllers.lazy.filter { $0 is SidebarViewController }.first as? SidebarViewController

    }

    var canvasController: CanvasViewController! {

        return childViewControllers.lazy.filter { $0 is CanvasViewController }.first as? CanvasViewController

    }

}