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VCPageView.m
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VCPageView.m
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/*
This code is licensed under a Simplified BSD License. See LICENSE for details.
If you find this code useful, please consider downloading a copy of the app that spawned it ( http://itunes.com/apps/VERVM ) and leaving a review.
My thanks,
-Joshua Emmons
@jemmons
*/
#import "VCPageView.h"
#import "VCClipLayer.h"
#import "VCFlipLayer.h"
#import "VCFlipShadowLayer.h"
#import <QuartzCore/QuartzCore.h>
@interface VCPageView ()
-(void)populateTable:(CGFloat[])aTable withWidth:(NSInteger)screenWidth andHeight:(NSInteger)screenHeight;
-(void)animateOpen;
-(void)animationWithWidth:(CGFloat)aWidth andHeight:(CGFloat)aHeight closing:(BOOL)isClosing;
-(void)animateClose;
-(void)doTapForward:(UIGestureRecognizer *)aGestureRecognizer;
-(void)doTapBack:(UIGestureRecognizer *)aGestureRecognizer;
-(BOOL)isPortrait;
@end
@implementation VCPageView
@synthesize thisPage, flipPage, nextPage, lastPage, spineLayer, flipShadow;
-(void)awakeFromNib{
//Initializers:
isAnimating = NO;
//Lookup Tables:
[self populateTable:portraitMultiplierTable withWidth:PORTRAIT_WIDTH andHeight:PORTRAIT_HEIGHT];
[self populateTable:landscapeMultiplierTable withWidth:LANDSCAPE_WIDTH andHeight:LANDSCAPE_HEIGHT];
CGFloat width = [self bounds].size.height * PAGE_RATIO;
for(int c=0; c<width; c++){
portraitBackMultiplierTable[c] = 1.0f - (c/width);
}
//Sublayers:
thisPage = [[VCClipLayer alloc] init];
flipPage =[[VCFlipLayer alloc] init];
nextPage = [[VCPageLayer alloc] init];
spineLayer = [[CALayer alloc]init];
[spineLayer setAnchorPoint:CGPointMake(0.5f, 0.0f)];
UIImage *spine = [UIImage imageNamed:@"spine.png"];
[spineLayer setContents:(id)[spine CGImage]];
lastPage = [[VCPageLayer alloc] init];
[lastPage setAnchorPoint:CGPointMake(1.0f, 1.0f)];
flipShadow = [[VCFlipShadowLayer alloc]init];
[[self layer] addSublayer:nextPage];
[[self layer] addSublayer:lastPage];
[[self layer] addSublayer:thisPage];
[[self layer] addSublayer:spineLayer];
[[self layer] addSublayer:flipPage];
[[self layer] addSublayer:flipShadow];
[self layoutLayers];
}
-(void)dealloc {
[thisPage release];thisPage=nil;
[flipPage release];flipPage=nil;
[nextPage release];nextPage=nil;
[lastPage release];lastPage=nil;
[flipShadow release];flipShadow=nil;
[spineLayer release];spineLayer=nil;
[super dealloc];
}
-(void)layoutLayers{
//This should be in -layoutSubviews, but that gets called like mad during animation because of automatic calls to CALayer -layoutIfNeeded.
CGSize size = [self frame].size;
CGFloat pageHeight = size.height;
CGFloat pageWidth = pageHeight * PAGE_RATIO;
CGFloat pad = size.width - pageWidth;
CGRect frame = CGRectMake(pad, 0.0f, pageWidth, pageHeight);
[nextPage setFrame:frame];
[thisPage setFrame:frame];
[lastPage setBounds:CGRectMake(0.0f, 0.0f, pageWidth, pageHeight)];
[lastPage setPosition:CGPointMake(pad, pageHeight)];
[flipPage setFrame:CGRectMake(size.width, 0.0f, 0.0f, size.height)];
[flipPage setHidden:NO];
[flipShadow setFrame:CGRectMake(size.width, 0.0f, 0.0f, size.height)];
[flipShadow setHidden:NO];
[spineLayer setPosition:CGPointMake(pad, 0.0f)];
[spineLayer setBounds:CGRectMake(0.0f, 0.0f, 128.0f, size.height)];
}
#pragma mark -
#pragma mark DRAWING
-(void)setNextImageName:(NSString *)anImageName{
[nextPage setImageName:anImageName];
}
-(void)setThisImageName:(NSString *)anImageName{
[thisPage setImageName:anImageName];
}
-(void)setFlipImageName:(NSString *)anImageName{
[flipPage setImageName:anImageName];
}
-(void)setLastImageName:(NSString *)anImageName{
[lastPage setImageName:anImageName];
}
#pragma mark -
#pragma mark TOUCHES
-(void)doFlipForward:(UIGestureRecognizer *)aGestureRecognizer forOrientation:(UIInterfaceOrientation)anOrientation{
if(isAnimating)
return;
switch([aGestureRecognizer state]){
case UIGestureRecognizerStateBegan:
[CATransaction begin];
[CATransaction setDisableActions:YES];
[flipPage setHidden:NO];
[flipShadow setHidden:NO];
[CATransaction commit];
break;
case UIGestureRecognizerStateChanged:
{
CGFloat multiplier = 0.0f;
if(UIInterfaceOrientationIsPortrait(anOrientation)){
multiplier = portraitMultiplierTable[(NSInteger)[aGestureRecognizer locationInView:self].x];
[thisPage setPortraitCurlAnimationPosition:multiplier];
[flipPage setPortraitCurlAnimationPosition:multiplier];
[flipShadow setPortraitCurlAnimationPosition:multiplier];
}else{
multiplier = landscapeMultiplierTable[(NSInteger)[aGestureRecognizer locationInView:self].x];
[thisPage setLandscapeCurlAnimationPosition:multiplier];
[flipPage setLandscapeCurlAnimationPosition:multiplier];
[flipShadow setLandscapeCurlAnimationPosition:multiplier];
}
}
break;
case UIGestureRecognizerStateEnded:
{
CGFloat transX = [(UIPanGestureRecognizer *)aGestureRecognizer translationInView:self].x;
CGFloat width = [self bounds].size.height * PAGE_RATIO;
if(width + transX < width/2){
[self animateOpen];
}else{
[self animateClose];
}
}
break;
}
}
-(void)doFlipBack:(UIGestureRecognizer *)aGestureRecognizer forOrientation:(UIInterfaceOrientation)anOrientation{
if(isAnimating)
return;
switch([aGestureRecognizer state]){
case UIGestureRecognizerStateBegan:
[CATransaction begin];
[CATransaction setDisableActions:YES];
[[UIApplication sharedApplication] sendAction:@selector(pageFlippedBack:) to:nil from:self forEvent:nil];
[thisPage setBounds:CGRectMake(0.0f, 0.0f, 0.0f, [self bounds].size.height)];
[flipPage setHidden:NO];
[flipShadow setHidden:NO];
[CATransaction commit];
break;
case UIGestureRecognizerStateChanged:
{
CGFloat multiplier = 0.0f;
if(UIInterfaceOrientationIsPortrait(anOrientation)){
multiplier = portraitBackMultiplierTable[(NSInteger)[aGestureRecognizer locationInView:self].x];
[thisPage setPortraitCurlAnimationPosition:multiplier];
[flipPage setPortraitCurlAnimationPosition:multiplier];
[flipShadow setPortraitCurlAnimationPosition:multiplier];
}else{
multiplier = landscapeMultiplierTable[(NSInteger)[aGestureRecognizer locationInView:self].x];
[thisPage setLandscapeCurlAnimationPosition:multiplier];
[flipPage setLandscapeCurlAnimationPosition:multiplier];
[flipShadow setLandscapeCurlAnimationPosition:multiplier];
}
}
break;
case UIGestureRecognizerStateEnded:
{
CGFloat transX = [(UIPanGestureRecognizer *)aGestureRecognizer translationInView:self].x;
CGFloat width = [self bounds].size.width;
if(transX > width/2){
[self animateClose];
}else{
[self animateOpen];
}
}
break;
}
}
-(void)doTapForward:(UIGestureRecognizer *)aGestureRecognizer{
if(isAnimating)
return;
[CATransaction begin];
[CATransaction setDisableActions:YES];
[flipPage setHidden:NO];
[flipShadow setHidden:NO];
[CATransaction commit];
//!!!: ugly hack!!!!
isATap = YES;
[self animateOpen];
}
-(void)doTapBack:(UIGestureRecognizer *)aGestureRecognizer{
if(isAnimating)
return;
CGSize size = [self bounds].size;
CGFloat pageWidth = size.height *PAGE_RATIO;
[CATransaction begin];
[CATransaction setDisableActions:YES];
[[UIApplication sharedApplication] sendAction:@selector(pageFlippedBack:) to:nil from:self forEvent:nil];
[thisPage setBounds:CGRectMake(0.0f, 0.0f, 0.0f, [self bounds].size.height)];
[flipPage setPosition:CGPointMake(size.width-pageWidth, size.height)];
[flipShadow setPosition:CGPointMake(size.width-pageWidth, size.height)];
[flipPage setBounds:CGRectMake(0.0f, 0.0f, pageWidth, size.height)];
[flipShadow setBounds:CGRectMake(0.0f, 0.0f, SHADOW_WIDTH, size.height)];
[flipPage setHidden:NO];
[flipShadow setHidden:NO];
[CATransaction commit];
[self animateClose];
}
#pragma mark -
#pragma mark DELEGATE
-(void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag{
[thisPage removeAnimationForKey:@"bounds"];
[flipPage removeAnimationForKey:@"bounds"];
[flipPage removeAnimationForKey:@"position"];
[flipShadow removeAnimationForKey:@"bounds"];
[flipShadow removeAnimationForKey:@"position"];
[CATransaction begin];
[CATransaction setDisableActions:YES];
[thisPage setContentsCenter:CGRectMake(0.0f, 0.0f, 1.0f, 1.0f)];
[flipPage setHidden:YES];
[flipShadow setHidden:YES];
[flipPage setContentsCenter:CGRectMake(0.0f, 0.0f, 1.0f, 1.0f)];
CGSize size = [self bounds].size;
CGFloat pageWidth = size.height * PAGE_RATIO;
[flipPage setFrame:CGRectMake(size.width, 0.0f, 0.0f, size.height)];
[flipShadow setFrame:CGRectMake(size.width, 0.0f, 0.0f, size.height)];
[thisPage setFrame:CGRectMake(size.width - pageWidth, 0.0f, pageWidth, size.height)];
if( ! [[(CABasicAnimation *)theAnimation toValue] CGRectValue].size.width > 0){
[[UIApplication sharedApplication] sendAction:@selector(pageFlipped:) to:nil from:self forEvent:nil];
}
[CATransaction commit];
isAnimating=NO;
}
#pragma mark -
#pragma mark PRIVATE
-(void)populateTable:(CGFloat[])aTable withWidth:(NSInteger)screenWidth andHeight:(NSInteger)screenHeight{
NSInteger localPageWidth = screenHeight * PAGE_RATIO;
NSInteger fullWidth = localPageWidth * 2;
NSInteger nonScreenWidth = fullWidth - screenWidth;
for(int c=0; c<screenWidth; c++){
aTable[c] = (fullWidth-(nonScreenWidth+c))/(CGFloat)fullWidth;
}
}
-(void)animateOpen{
isAnimating = YES;
CGSize size = [self bounds].size;
[self animationWithWidth:size.width andHeight:size.height closing:NO];
}
-(void)animateClose{
isAnimating = YES;
CGSize size = [self bounds].size;
[self animationWithWidth:size.width andHeight:size.height closing:YES];
}
-(void)animationWithWidth:(CGFloat)aWidth andHeight:(CGFloat)aHeight closing:(BOOL)isClosing{
CGFloat pageWidth = aHeight * PAGE_RATIO;
CABasicAnimation *animation = nil;
//This is done as a basic animation so we can attach a delegate.
animation = [CABasicAnimation animationWithKeyPath:@"bounds"];
if(isClosing){
[animation setToValue:[NSValue valueWithCGRect:CGRectMake(0.0f, 0.0f, pageWidth, aHeight)]];
}else{
[animation setToValue:[NSValue valueWithCGRect:CGRectMake(0.0f, 0.0f, 0, aHeight)]];
}
[animation setDuration:FLIP_DURATION];
[animation setFillMode:kCAFillModeForwards];
[animation setRemovedOnCompletion:NO];
[animation setDelegate:self];
[thisPage addAnimation:animation forKey:@"bounds"];
//We're doing these as Basic Animations because the timeing of implicite animations doesn't line up with the above.
animation = [CABasicAnimation animationWithKeyPath:@"bounds"];
if(isClosing){
[animation setToValue:[NSValue valueWithCGRect:CGRectMake(0.0f, 0.0f, 0, aHeight)]];
}else{
[animation setToValue:[NSValue valueWithCGRect:CGRectMake(0.0f, 0.0f, pageWidth, aHeight)]];
}
[animation setDuration:FLIP_DURATION];
[animation setFillMode:kCAFillModeForwards];
[animation setRemovedOnCompletion:NO];
[flipPage addAnimation:animation forKey:@"bounds"];
animation = [CABasicAnimation animationWithKeyPath:@"bounds"];
if(isClosing){
[animation setToValue:[NSValue valueWithCGRect:CGRectMake(0.0f, 0.0f, 0, aHeight)]];
}else{
[animation setToValue:[NSValue valueWithCGRect:CGRectMake(0.0f, 0.0f, SHADOW_WIDTH, aHeight)]];
}
[animation setDuration:FLIP_DURATION];
[animation setFillMode:kCAFillModeForwards];
[animation setRemovedOnCompletion:NO];
[flipShadow addAnimation:animation forKey:@"bounds"];
animation = [CABasicAnimation animationWithKeyPath:@"position"];
if(isClosing){
[animation setToValue:[NSValue valueWithCGPoint:CGPointMake(aWidth, aHeight)]];
}else{
[animation setToValue:[NSValue valueWithCGPoint:CGPointMake(aWidth - pageWidth, aHeight)]];
}
[animation setDuration:FLIP_DURATION];
[animation setFillMode:kCAFillModeForwards];
[animation setRemovedOnCompletion:NO];
[flipPage addAnimation:animation forKey:@"position"];
animation = [CABasicAnimation animationWithKeyPath:@"position"];
if(isClosing){
[animation setToValue:[NSValue valueWithCGPoint:CGPointMake(aWidth, aHeight)]];
}else{
[animation setToValue:[NSValue valueWithCGPoint:CGPointMake(aWidth - pageWidth, aHeight)]];
}
[animation setDuration:FLIP_DURATION];
[animation setFillMode:kCAFillModeForwards];
[animation setRemovedOnCompletion:NO];
[flipShadow addAnimation:animation forKey:@"position"];
//However, can't figure out how to wrap affine tranform without NSAffineTransform. But timing isn't as critical here anyway.
[CATransaction begin];
[CATransaction setAnimationDuration:FLIP_DURATION];
[flipPage setAffineTransform:CGAffineTransformIdentity];
[flipShadow setAffineTransform:CGAffineTransformIdentity];
if( (! isClosing) && (! isATap) ){
[flipPage setContentsCenter:CGRectMake(1, 0, 1, 0)];
}
isATap = NO;
[CATransaction commit];
}
-(BOOL)isPortrait{
return YES;
// if([self bounds].size.height
}
@end