GLAirPlay/GLViewController.m

/*
     File: GLViewController.m
 Abstract: This UIViewController configures the OpenGL ES view and its UI when an external display is connected/disconnected.
  Version: 1.0
 
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 */
 
#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;
}
 
- (NSUInteger)supportedInterfaceOrientations {
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
        return UIInterfaceOrientationMaskAllButUpsideDown;
    } else {
        return UIInterfaceOrientationMaskAll;
    }
}
 
@end