/*

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

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 This UIViewController configures the OpenGL ES view and its UI when an external display is connected/disconnected.

 */

#import "GLViewController.h"

#import "UserInterfaceViewController.h"

#import "GLView.h"

@implementation GLViewController

- (void)screenDidConnect:(UIViewController *)userInterface

{

    // Remove UI previously added atop the GL view

    for (UIView* v in [self.view subviews])

            [v removeFromSuperview];

    // One of these userInterface view controllers is visible at a time,

    // so release the other one to minimize memory usage

    self.userInterfaceOnTop = nil;

    self.userInterfaceFullscreen = userInterface;

    if (self.userInterfaceFullscreen)

    {

        // Setup UI (When an external display is connected, it will be added to mainViewController's view

        // in MainViewController/-screenDidChange:)

        [(UserInterfaceViewController *)self.userInterfaceFullscreen screenDidConnect];

        // Set the userControlDelegte, which is responsible for setting the cube's rotating radius

        [(GLView *)self.view setUserControlDelegate:(id)self.userInterfaceFullscreen];

    }

}

- (void)screenDidDisconnect:(UIViewController *)userInterface

{

    // One of these userInterface view controllers is visible at a time,

    // so release the other one to minimize memory usage

    self.userInterfaceFullscreen = nil;

    self.userInterfaceOnTop = userInterface;

    if (self.userInterfaceOnTop)

    {

        // Setup UI

        [(UserInterfaceViewController *)self.userInterfaceOnTop screenDidDisconnect];

        // Add UI on top

        [(GLView *)self.view addSubview:self.userInterfaceOnTop.view];

        // Set the userControlDelegte, which is responsible for setting the cube's rotating radius

        [(GLView *)self.view setUserControlDelegate:(id)self.userInterfaceOnTop];

    }

}

- (void)setTargetScreen:(UIScreen *)targetScreen

{

    // Delegate to the GL view to create a CADisplayLink for the target display (UIScreen/-displayLinkWithTarget:selector:)

    // This will result in the native fps for whatever display you create it from.

    [(GLView *)self.view setTargetScreen:targetScreen];

}

- (void)startAnimation

{

    [(GLView *)self.view startAnimation];

}

- (void)stopAnimation

{

    [(GLView *)self.view stopAnimation];

}

- (void)viewDidLoad

{

    [super viewDidLoad];

    self.view.autoresizingMask =

        UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin |

        UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin |

        UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;

}

- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

- (BOOL)shouldAutorotate {

    return YES;

}

@end