AppController.m

//
// File:       AppController.m
//
// Abstract:   The window controller that manages user events and sets up the window
//
// Version:    1.0
//
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#import <Quartz/Quartz.h>

#import "AppController.h"
#import "ExampleCALayerDelegate.h"
#import "ExampleCAOpenGLLayer.h"
#import "ExampleCATiledLayerDelegate.h"

@interface AppController()
-(void)setupCALayer;
-(void)setupCAOpenGLLayer;
@end

@implementation AppController

// Constants used by the Scroll layer to setup its contents and to scroll.
#define kScrollContentRect CGRectMake(  0.0,   0.0, 300.0, 300.0)

-(void)awakeFromNib
{
	// Setup the delegates that are used by setupCALayer, setupCAScrollLayer and setupCATiledLayer
	delegateCALayer = [[ExampleCALayerDelegate alloc] init];
	
	[self setupCALayer];
	[self setupCAOpenGLLayer];
}

-(void)dealloc
{
	[delegateCALayer release];
	[super dealloc];
}

-(void)setupCALayer
{
	exampleCALayer = [CALayer layer];
	
	// Set the layer delegate so that we have some content drawn
	exampleCALayer.delegate = delegateCALayer;
	
	// Layers start life validated (unlike views).
	// We request that the layer have its contents drawn so that it can display something.
	[exampleCALayer setNeedsDisplay];
	
	// Set the view to host the layer!
	hostCALayer.layer = exampleCALayer;
}

-(void)setupCAOpenGLLayer
{
	exampleCAOpenGLLayer = [ExampleCAOpenGLLayer layer];
	
	// Layers start life validated (unlike views).
	// We request that the layer have its contents drawn so that it can display something.
	[exampleCAOpenGLLayer setNeedsDisplay];
	
	hostCAOpenGLLayer.layer = exampleCAOpenGLLayer;
}

-(IBAction)redrawLayerContent:(id)sender
{
	// Just tell the layer to display itself and it will redraw
	[exampleCALayer setNeedsDisplay];
}

-(IBAction)toggleGLAsync:(id)sender
{
	// By turning on Async, the layer will update on its own.
	exampleCAOpenGLLayer.asynchronous = [sender state] == NSOnState;
}

-(IBAction)toggleGLDisplayOnResize:(id)sender
{
	// By turning on needsDisplayOnBoundsChange, the GLLayer will get redisplayed when it is resized, forcing the content
	// to be resized to the layer's current size automatically. With this off, the content will be resized when -display is called.
	exampleCAOpenGLLayer.needsDisplayOnBoundsChange = [sender state] == NSOnState;
}

-(IBAction)redrawGLContent:(id)sender
{
	// Just tell the layer to display itself and it will redraw
	[hostCAOpenGLLayer.layer setNeedsDisplay];
}

@end