/*File: TransitionViewController.mAbstract: The view controller for showing transitions with UIView.Version: 1.7Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple Inc.("Apple") in consideration of your agreement to the following terms, and youruse, installation, modification or redistribution of this Apple softwareconstitutes acceptance of these terms.  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All Rights Reserved.*/#import "TransitionViewController.h"#import "Constants.h"@implementation TransitionsViewController#define kImageHeight		200.0#define kImageWidth			250.0#define kTransitionDuration	0.75#define kTopPlacement		80.0	// y coord for the images- (id)init{	self = [super init];	if (self)	{		// this title will appear in the navigation bar		self.title = NSLocalizedString(@"TransitionsTitle", @"");	}	return self;}- (void)dealloc{	[mainView release];	[flipToView release];	[containerView release];		[super dealloc];}// create the alternate view that we flip to.// In this case, it's almost exactly the same except for differnt photos//- (void)createAlternateFlipView{	CGRect imageFrame = CGRectMake(0.0, 0.0, kImageWidth, kImageHeight);	flipToView = [[UIImageView alloc] initWithFrame:imageFrame];	flipToView.image = [UIImage imageNamed:@"scene2.jpg"];}- (void)loadView{	// add the top-most parent view	UIView *contentView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];	contentView.backgroundColor = [UIColor blackColor];	self.view = contentView;	[contentView release];		// create the container view which we will use for transition animation (centered horizontally)	CGRect frame = CGRectMake(round((self.view.bounds.size.width - kImageWidth) / 2.0), kTopPlacement, kImageWidth, kImageHeight);	containerView = [[UIView alloc] initWithFrame:frame];	[self.view addSubview:containerView];		// create the initial image view	frame = CGRectMake(0.0, 0.0, kImageWidth, kImageHeight);	mainView = [[UIImageView alloc] initWithFrame:frame];	mainView.image = [UIImage imageNamed:@"scene1.jpg"];	[containerView addSubview:mainView];		// create the alternate image view (to transition between)	[self createAlternateFlipView];		// create the buttom toolbar to host the two transition buttons,	// we will use flex items on both sides to center them	//	UIToolbar *toolbar = [UIToolbar new];	toolbar.barStyle = UIBarStyleBlackOpaque;		UIBarButtonItem *flexItem = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace																 target:nil																 action:nil] autorelease];	UIBarButtonItem *flipItem = [[[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"FlipTitle", @"")																  style:UIBarButtonItemStyleBordered																 target:self																 action:@selector(flipAction:)] autorelease];	UIBarButtonItem *curlItem = [[[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"CurlTitle", @"")																  style:UIBarButtonItemStyleBordered																 target:self																 action:@selector(curlAction:)] autorelease];	NSArray *items = [NSArray arrayWithObjects: 					  flexItem,							flipItem,							curlItem,					  flexItem,					  nil];	toolbar.items = items;		// size up the toolbar and set its frame	[toolbar sizeToFit];	CGFloat toolbarHeight = [toolbar frame].size.height;	CGRect mainViewBounds = self.view.bounds;	[toolbar setFrame:CGRectMake(CGRectGetMinX(mainViewBounds),								 CGRectGetMinY(mainViewBounds) + CGRectGetHeight(mainViewBounds) - (toolbarHeight * 2.0),								 CGRectGetWidth(mainViewBounds),								 toolbarHeight)];		[self.view addSubview:toolbar];	[toolbar release];}- (void)curlAction:(id)sender{	[UIView beginAnimations:nil context:NULL];	[UIView setAnimationDuration:kTransitionDuration];		[UIView setAnimationTransition:([mainView superview] ?									UIViewAnimationTransitionCurlUp : UIViewAnimationTransitionCurlDown)						   forView:containerView cache:YES];	if ([flipToView superview])	{		[flipToView removeFromSuperview];		[containerView addSubview:mainView];	}	else	{		[mainView removeFromSuperview];		[containerView addSubview:flipToView];	}		[UIView commitAnimations];}- (void)flipAction:(id)sender{	[UIView beginAnimations:nil context:NULL];	[UIView setAnimationDuration:kTransitionDuration];			[UIView setAnimationTransition:([mainView superview] ?										UIViewAnimationTransitionFlipFromLeft : UIViewAnimationTransitionFlipFromRight)										forView:containerView cache:YES];	if ([flipToView superview])	{		[flipToView removeFromSuperview];		[containerView addSubview:mainView];	}	else	{		[mainView removeFromSuperview];		[containerView addSubview:flipToView];	}		[UIView commitAnimations];}#pragma mark UIViewController delegate methods// called after this controller's view was dismissed, covered or otherwise hidden- (void)viewWillDisappear:(BOOL)animated{		// restore the nav bar and status bar color to default	self.navigationController.navigationBar.barStyle = UIBarStyleDefault;	[UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleDefault;}// called after this controller's view will appear- (void)viewWillAppear:(BOOL)animated{		// for aesthetic reasons (the background is black), make the nav bar black for this particular page	self.navigationController.navigationBar.barStyle = UIBarStyleBlackOpaque;		// match the status bar with the nav bar	[UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleBlackOpaque;}@end