/*

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

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 The presentation controller used for the ChatReplyViewController presentation.

 */

import UIKit

class ChatReplyPresentationController: UIPresentationController {

    let blurView = UIVisualEffectView()

    override init(presentedViewController: UIViewController, presenting presentingViewController: UIViewController?) {

        super.init(presentedViewController: presentedViewController, presenting: presentingViewController)

        blurView.autoresizingMask = [.flexibleHeight, .flexibleWidth]

    }

    override func presentationTransitionWillBegin() {

        blurView.frame = containerView!.bounds

        containerView!.insertSubview(blurView, at: 0)

        presentedViewController.transitionCoordinator?.animate(alongsideTransition: { _ in

            self.blurView.effect = UIBlurEffect(style: .light)

        })

    }

    override func dismissalTransitionWillBegin() {

        presentedViewController.transitionCoordinator?.animate(alongsideTransition: { _ in

            self.blurView.effect = nil

        })

    }

    override var frameOfPresentedViewInContainerView: CGRect {

        return containerView!.bounds

    }

}