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<pre class="sourcecodebox">//
// File: AppController.m
//
// Abstract: The window controller that manages user events and sets up the window
//
// Version: 1.0
//
// Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Inc. ("Apple")
// in consideration of your agreement to the following terms, and your use,
// installation, modification or redistribution of this Apple software
// constitutes acceptance of these terms. If you do not agree with these
// terms, please do not use, install, modify or redistribute this Apple
// software.
//
// In consideration of your agreement to abide by the following terms, and
// subject to these terms, Apple grants you a personal, non - exclusive
// license, under Apple's copyrights in this original Apple software ( the
// "Apple Software" ), to use, reproduce, modify and redistribute the Apple
// Software, with or without modifications, in source and / or binary forms;
// provided that if you redistribute the Apple Software in its entirety and
// without modifications, you must retain this notice and the following text
// and disclaimers in all such redistributions of the Apple Software. Neither
// the name, trademarks, service marks or logos of Apple Inc. may be used to
// endorse or promote products derived from the Apple Software without specific
// prior written permission from Apple. Except as expressly stated in this
// notice, no other rights or licenses, express or implied, are granted by
// Apple herein, including but not limited to any patent rights that may be
// infringed by your derivative works or by other works in which the Apple
// Software may be incorporated.
//
// The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
// WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
// WARRANTIES OF NON - INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION
// ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
//
// IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
// CONSEQUENTIAL DAMAGES ( INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION ) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION
// AND / OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER
// UNDER THEORY OF CONTRACT, TORT ( INCLUDING NEGLIGENCE ), STRICT LIABILITY OR
// OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Copyright ( C ) 2008 Apple Inc. All Rights Reserved.
//
#import <Quartz/Quartz.h>
#import <QTKit/QTKit.h>
#import "AppController.h"
#import "ExampleCALayerDelegate.h"
#import "ExampleCAOpenGLLayer.h"
#import "ExampleCATiledLayerDelegate.h"
@interface AppController()
-(void)setupCALayer;
-(void)setupCAOpenGLLayer;
-(void)setupCATextLayer;
-(void)setupQCCompositionLayer;
-(void)setupQTMovieLayer;
-(void)setupCAScrollLayer;
-(void)setupCATiledLayer;
@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];
delegateCATiledLayer = [[ExampleCATiledLayerDelegate alloc] init];
[self setupCALayer];
[self setupCAOpenGLLayer];
[self setupCATextLayer];
[self setupCAScrollLayer];
[self setupCATiledLayer];
[self setupQCCompositionLayer];
[self setupQTMovieLayer];
}
-(void)dealloc
{
[delegateCALayer release];
[delegateCATiledLayer 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;
}
-(void)setupCATextLayer
{
exampleCATextLayer = [CATextLayer layer];
// Setting the layer's text will invalidate the layer, so we don't need
// to call -setNeedsDisplay directly.
exampleCATextLayer.string = @"Hello World";
// The default foreground color is white, so we get a bit more contrast
// we'll set the color to something darker.
CGColorRef fgColor = CGColorCreateGenericRGB(0.1, 0.2, 0.3, 1.0);
exampleCATextLayer.foregroundColor = fgColor;
CGColorRelease(fgColor);
hostCATextLayer.layer = exampleCATextLayer;
}
-(void)setupQCCompositionLayer
{
// Grab a composition
NSString * compositionPath = [[NSBundle mainBundle] pathForResource:@"Clouds" ofType:@"qtz"];
// Create a QCComposition Layer with the path to that composition
// A QCCompositionLayer is a CAOpenGLLayer with the asynchronous property set to YES
// therefore it does not need to be invalidated to display (it will automatically be invalidated).
exampleQCCompositionLayer = [QCCompositionLayer compositionLayerWithFile:compositionPath];
hostQCCompositionLayer.layer = exampleQCCompositionLayer;
}
-(void)setupQTMovieLayer
{
// Grab a Quicktime Movie from our bundle
QTMovie * movie = [QTMovie movieNamed:@"Sample.mov" error:nil];
// Set it on the movie layer
exampleQTMovieLayer = [QTMovieLayer layerWithMovie:movie];
hostQTMovieLayer.layer = exampleQTMovieLayer;
}
-(void)setupCAScrollLayer
{
// A scroll layer by itself is rather uninteresting
// so we'll create a regular layer to provide content.
scrollLayerContent = [CALayer layer];
exampleCAScrollLayer = [CAScrollLayer layer];
// Since its handy, we'll use the same content as our basic CALayer example
// This also shows that you can use the same delegate for multiple layers :)
scrollLayerContent.delegate = delegateCALayer;
// Layers start life validated (unlike views).
// We request that the layer have its contents drawn so that it can display something.
[scrollLayerContent setNeedsDisplay];
// We set a frame for this layer. Sublayers coordinates are always in terms of the
// parent layer's bounds.
scrollLayerContent.frame = kScrollContentRect;
// Now we add the configured layer to the scroll layer.
[exampleCAScrollLayer addSublayer:scrollLayerContent];
hostCAScrollLayer.layer = exampleCAScrollLayer;
}
-(void)setupCATiledLayer
{
// If we set the tiled layer as the layer for the host NSView, then it won't be able to zoom
// and we won't be able to demonstrate multiple levels of detail, thus we create a dummy CALayer
// to act as the CATiledLayer's parent and we'll set the sublayer transform of that layer in order to zoom it.
CALayer *baseLayer = [CALayer layer];
hostCATiledLayer.layer = baseLayer;
// Now the real fun begins as we setup the CATiledLayer
exampleCATiledLayer = [CATiledLayer layer];
[baseLayer addSublayer:exampleCATiledLayer];
// Like a CALayer, a CATiledLayer can use a delegate to do the drawing.
// The ExampleCATiledLayerDelegate is essentially the same as the ExampleCALayerDelegate
// that have already seen, but instead draws an image
exampleCATiledLayer.delegate = delegateCATiledLayer;
// To provide multiple levels of content, you need to set the levelsOfDetail property.
// For this sample, we have 5 levels of detail (1/4x - 4x).
// By setting the value to 5, we establish that we have levels of 1/16x - 1x (2^-4 - 2^0)
// we use the levelsOfDetailBias property we shift this up by 2 raised to the power
// of the bias, changing the range to 1/4-4x (2^-2 - 2^2).
exampleCATiledLayer.levelsOfDetail = 5;
exampleCATiledLayer.levelsOfDetailBias = 2;
// Layers start life validated (unlike views).
// We request that the layer have its contents drawn so that it can display something.
[exampleCATiledLayer setNeedsDisplay];
// Set the size of the layer
exampleCATiledLayer.bounds = CGRectMake(0.0, 0.0, kTiledLayerExampleWidth, kTiledLayerExampleHeight);
// And position its center over the center of the host view (whose size determines the size of our parent layer)
// We don't update this, so if you resize the window the layer won't appear in the center of that window anymore.
exampleCATiledLayer.position = CGPointMake(NSMidX(hostCATiledLayer.frame), NSMidY(hostCATiledLayer.frame));
}
-(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];
}
-(IBAction)changeText:(id)sender
{
exampleCATextLayer.string = [sender stringValue];
}
-(IBAction)toggleMovieLayer:(id)sender
{
// When we are asked to play, we'll just goto the beginning.
[exampleQTMovieLayer.movie gotoBeginning];
[exampleQTMovieLayer.movie play];
}
-(IBAction)redrawScrollContent:(id)sender
{
[scrollLayerContent setNeedsDisplay];
[exampleCAScrollLayer setNeedsDisplay];
}
// Creates a rect that is a fraction of the original rect
CGRect MakeSubrect(CGRect r, CGFloat x, CGFloat y, CGFloat w, CGFloat h)
{
return CGRectMake(
r.origin.x + r.size.width * x,
r.origin.y + r.size.height * y,
r.size.width * w,
r.size.height * h);
}
-(IBAction)scrollUp:(id)sender
{
[exampleCAScrollLayer scrollToRect:MakeSubrect(kScrollContentRect, 0.25, 0.5, 1.0, 0.5)];
}
-(IBAction)scrollRight:(id)sender
{
[exampleCAScrollLayer scrollToRect:MakeSubrect(kScrollContentRect, 0.5, 0.25, 1.0, 0.5)];
}
-(IBAction)scrollDown:(id)sender
{
[exampleCAScrollLayer scrollToRect:MakeSubrect(kScrollContentRect, 0.25, 0.0, 1.0, 0.5)];
}
-(IBAction)scrollLeft:(id)sender
{
[exampleCAScrollLayer scrollToRect:MakeSubrect(kScrollContentRect, 0.0, 0.25, 1.0, 0.5)];
}
-(IBAction)scrollUpperLeft:(id)sender
{
[exampleCAScrollLayer scrollToRect:MakeSubrect(kScrollContentRect, 0.0, 0.5, 0.5, 0.5)];
}
-(IBAction)scrollUpperRight:(id)sender
{
[exampleCAScrollLayer scrollToRect:MakeSubrect(kScrollContentRect, 0.5, 0.5, 0.5, 0.5)];
}
-(IBAction)scrollLowerLeft:(id)sender
{
[exampleCAScrollLayer scrollToRect:MakeSubrect(kScrollContentRect, 0.0, 0.0, 0.5, 0.5)];
}
-(IBAction)scrollLowerRight:(id)sender
{
[exampleCAScrollLayer scrollToRect:MakeSubrect(kScrollContentRect, 0.5, 0.0, 0.5, 0.5)];
}
-(IBAction)redrawZoomableContent:(id)sender
{
[delegateCATiledLayer refreshContent];
[exampleCATiledLayer setNeedsDisplay];
}
-(IBAction)tiledZoom:(id)sender
{
CGFloat zoom = 1.0;
switch([sender selectedSegment])
{
case 0:
zoom = 0.25;
break;
case 1:
zoom = 0.5;
break;
case 2:
zoom = 1.0;
break;
case 3:
zoom = 2.0;
break;
case 4:
zoom = 4.0;
break;
}
hostCATiledLayer.layer.sublayerTransform = CATransform3DMakeScale(zoom, zoom, 1.0);
}
@end
</pre>
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