PageView

MPageView.h

//
//  MPageView.h
//  Magazine
//
//  Created by wang xuefeng on 10-12-9.
//  Copyright 2010 www.5yi.com. All rights reserved.
//

#import <UIKit/UIKit.h>


@interface MPageView : UIScrollView {
	UIImageView *imageView;
	UILabel *textLabel;	
	
	CGPoint startTouchPosition;
	NSString *swipType;
}

@property (nonatomic, retain) UIImageView *imageView;
@property (nonatomic, retain) UILabel *textLabel;


- (id)initWithPageIndex:(int)index PageDict:(NSDictionary *)dict1 MagazineDict:(NSDictionary *)dict2;
- (void)loadContentWithIndex:(int)index pageDict:(NSDictionary *)pageDict magazineDict:(NSDictionary *)magazineDict;

- (CGFloat)getStringHeight:(NSString *)string font:(UIFont *)font;


@end

MPageView.m

//
//  MPageView.m
//  Magazine
//
//  Created by wang xuefeng on 10-12-9.
//  Copyright 2010 www.5yi.com. All rights reserved.
//

#import "MPageView.h"
#import "MUtility.h"
#import "MFoundation.h"
#import "RootViewController.h"
#import <QuartzCore/QuartzCore.h>


@implementation MPageView

@synthesize imageView;
@synthesize textLabel;


- (id)initWithFrame:(CGRect)frame 
{
    if ((self = [super initWithFrame:frame])) 
	{
		
    }
	
    return self;
}


- (id)initWithPageIndex:(int)index PageDict:(NSDictionary *)dict1 MagazineDict:(NSDictionary *)dict2;
{
	self = [super init];
	self.scrollEnabled = YES;
	self.multipleTouchEnabled = YES;
	
	[self loadContentWithIndex:index pageDict:dict1 magazineDict:dict2];
	
	return self;
}


- (void)loadContentWithIndex:(int)index pageDict:(NSDictionary *)pageDict magazineDict:(NSDictionary *)magazineDict;
{
	// init image view here
	imageView = [[UIImageView alloc] initWithFrame:CGRectZero];
	imageView.backgroundColor = [MUtility randomColor];
	NSString *bookDirectory = [magazineDict objectForKey:@"book_directory"];
	NSString *imageName = [pageDict objectForKey:@"image_name"];
	NSString *imageFile = [NSString stringWithFormat:@"%@/%@",bookDirectory,imageName];
	NSString *imagePath = [MUtility documentPathForFile:imageFile];
	imageView.image = [UIImage imageWithContentsOfFile:imagePath];
	[self addSubview:imageView];
	
	// init text label here
	textLabel = [[UILabel alloc] initWithFrame:CGRectZero];
	textLabel.backgroundColor = [MUtility randomColor];
	textLabel.textColor = [UIColor whiteColor];
	textLabel.lineBreakMode = UILineBreakModeWordWrap;
	textLabel.font = [UIFont systemFontOfSize:15.0f];
	textLabel.text = [pageDict objectForKey:@"text_content"];
	textLabel.numberOfLines = 0;
	[self addSubview:textLabel];
		

	CGFloat imageWidth = PAGE_WIDTH - PADDING*2 ;
	CGFloat imageHeight = PAGE_HEIGHT;
	CGFloat textHeight = [self getStringHeight:textLabel.text font:textLabel.font];
	
	self.imageView.frame = CGRectMake(PADDING, PADDING, imageWidth, imageHeight);
	self.textLabel.frame = CGRectMake(PADDING, 20+self.imageView.frame.size.height+PADDING, PAGE_WIDTH-PADDING*2, textHeight);
	
	CGFloat pageHeight = self.textLabel.frame.origin.y + self.textLabel.frame.size.height + 20;
	self.frame = CGRectMake(0.0f, 0.0f, PAGE_WIDTH,pageHeight);
	self.contentSize = CGSizeMake(self.frame.size.width	, pageHeight);
	
	[imageView release];
	[textLabel release];
}


/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code.
}
*/

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


#pragma mark -
#pragma mark custom methods

- (CGFloat)getStringHeight:(NSString *)string font:(UIFont *)font {
	CGSize size = [string sizeWithFont:font 
					 constrainedToSize:CGSizeMake(768-PADDING*2, 1000000.0f) 
						 lineBreakMode:UILineBreakModeWordWrap];
	return size.height;
}


#pragma mark -
#pragma mark touches methods

- (void)setToolbarHidden
{
	RootViewController *rootController = (RootViewController *)[self.superview.superview nextResponder];	
	BOOL isVisible = rootController.toolbarIsHidden;	
	[rootController.topToolbar setVisible:!isVisible];
	[rootController.bottomToolbar setVisible:!isVisible];	
	rootController.toolbarIsHidden = !isVisible;	
}

#define kAnimationKey @"transitionViewAnimation"
#define HORIZ_SWIPE_DRAG_MIN 12 
#define VERT_SWIPE_DRAG_MAX 4 

// The following swipe code derives from Apple Sample Code
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
	if ([touches count] == 1) {
		[self setToolbarHidden];
	}	
	
	UITouch *touch = [touches anyObject]; 
	startTouchPosition = [touch locationInView:self]; 
	swipType = NULL;	
} 

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
	UITouch *touch = touches.anyObject; 
	CGPoint currentTouchPosition = [touch locationInView:self]; 
	
	if (fabsf(startTouchPosition.x - currentTouchPosition.x) >= HORIZ_SWIPE_DRAG_MIN && 
		fabsf(startTouchPosition.y - currentTouchPosition.y) <= VERT_SWIPE_DRAG_MAX) 
	{ 
		// Horizontal Swipe
		if (startTouchPosition.x < currentTouchPosition.x)
			swipType = kCATransitionFromLeft;
		else 
			swipType = kCATransitionFromRight;
	} else {
		// Process a non-swipe event. 
		swipType = NULL;
	}	
} 

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event 
{
	if (swipType) 
	{
		CATransition *animation = [CATransition animation];
		[animation setDelegate:self];		
		[animation setType:kCATransitionPush];
		// [animation setType:@"oglFlip"]; 
		[animation setSubtype:swipType];
		[animation setDuration:0.5f];
		[animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
		
		// CATransition *animation = [self getAnimation:swipType];
		// self.superview is helloController's view
		if (swipType == kCATransitionFromLeft) {
			[[self superview] exchangeSubviewAtIndex:0 withSubviewAtIndex:1];
		} else {
			[[self superview] exchangeSubviewAtIndex:2 withSubviewAtIndex:1];
		}
		
		[[[self superview] layer] addAnimation:animation forKey:kAnimationKey];
		
	}
}



@end