/*

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

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    A state used by `LevelScene` to provide appropriate UI via an overlay scene when the game is paused.

*/

import SpriteKit

import GameplayKit

class LevelScenePauseState: LevelSceneOverlayState {

    // MARK: Properties

    override var overlaySceneFileName: String {

        return "PauseScene"

    }

    // MARK: GKState Life Cycle

    override func didEnter(from previousState: GKState?) {

        super.didEnter(from: previousState)

        levelScene.worldNode.isPaused = true

    }

    override func isValidNextState(_ stateClass: AnyClass) -> Bool {

        return stateClass is LevelSceneActiveState.Type

    }

    override func willExit(to nextState: GKState) {

        super.willExit(to: nextState)

        levelScene.worldNode.isPaused = false

    }

}