/*

 Copyright (C) 2017 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 AudioEngineViewController hosts the AudioEngine UI as well as the UI for each individual node

             This controller is linked to a size-classes storyboard that supports both iPhone and iPad UI

*/

#import "AudioEngineViewController.h"

#import "AudioViewController.h"

#import "AudioEngine.h"

#import "CAAVAudioUnitView.h"

#import "CAUITransportButton.h"

@interface AudioEngineViewController () <AudioEngineDelegate>

@property (strong) AudioEngine *audioEngine;

@property (unsafe_unretained, nonatomic) IBOutlet UIView *shadowView;

@end

@implementation AudioEngineViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

    [self setupUI];

}

- (void)setupUI

{

    //apply a drop shadow to the boxes

    self.shadowView.layer.shadowColor = [UIColor blackColor].CGColor;

    self.shadowView.layer.shadowRadius = 10.0f;

    self.shadowView.layer.shadowOffset = CGSizeMake(0.0f, 5.0f);

    self.shadowView.layer.shadowOpacity = 0.5f;

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender

{

    //initialize

    if (!self.audioEngine) {

        self.audioEngine = [[AudioEngine alloc] init];

        self.audioEngine.delegate = self;

    }

    //Pass the audio engine to all the audioviewcontrollers

    if ([[segue.destinationViewController class] isSubclassOfClass:[AudioViewController class]]) {

        AudioViewController *controller = (AudioViewController*)segue.destinationViewController;

        controller.audioEngine = self.audioEngine;

    }

}

#pragma mark AudioEngineDelegate Methods

- (void)engineWasInterrupted

{

    //update the UI elements for all the audioviewcontrollers

    for (UIViewController *controller in self.childViewControllers) {

        if ([[controller class] isSubclassOfClass:[AudioViewController class]]) {

            [((AudioViewController*)controller) updateUIElements];

        }

    }

}

- (void)engineConfigurationHasChanged

{

    //update the UI elements for all the audioviewcontrollers

    for (UIViewController *controller in self.childViewControllers) {

        if ([[controller class] isSubclassOfClass:[AudioViewController class]]) {

            [((AudioViewController*)controller) updateUIElements];

        }

    }

}

@end