/*

     File: MyViewController.m

 Abstract: The main view controller of this app.

  Version: 1.0

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 */

#import "MyViewController.h"

@implementation MyViewController

@synthesize scrollView1, scrollView2;

const CGFloat kScrollObjHeight  = 199.0;

const CGFloat kScrollObjWidth   = 280.0;

const NSUInteger kNumImages     = 5;

- (void)layoutScrollImages

{

    UIImageView *view = nil;

    NSArray *subviews = [scrollView1 subviews];

    // reposition all image subviews in a horizontal serial fashion

    CGFloat curXLoc = 0;

    for (view in subviews)

    {

        if ([view isKindOfClass:[UIImageView class]] && view.tag > 0)

        {

            CGRect frame = view.frame;

            frame.origin = CGPointMake(curXLoc, 0);

            view.frame = frame;

            curXLoc += (kScrollObjWidth);

        }

    }

    // set the content size so it can be scrollable

    [scrollView1 setContentSize:CGSizeMake((kNumImages * kScrollObjWidth), [scrollView1 bounds].size.height)];

}

- (void)viewDidLoad

{

    self.view.backgroundColor = [UIColor viewFlipsideBackgroundColor];

    // 1. setup the scrollview for multiple images and add it to the view controller

    //

    // note: the following can be done in Interface Builder, but we show this in code for clarity

    [scrollView1 setBackgroundColor:[UIColor blackColor]];

    [scrollView1 setCanCancelContentTouches:NO];

    scrollView1.indicatorStyle = UIScrollViewIndicatorStyleWhite;

    scrollView1.clipsToBounds = YES;        // default is NO, we want to restrict drawing within our scrollview

    scrollView1.scrollEnabled = YES;

    // pagingEnabled property default is NO, if set the scroller will stop or snap at each photo

    // if you want free-flowing scroll, don't set this property.

    scrollView1.pagingEnabled = YES;

    // load all the images from our bundle and add them to the scroll view

    NSUInteger i;

    for (i = 1; i <= kNumImages; i++)

    {

        NSString *imageName = [NSString stringWithFormat:@"image%d.jpg", i];

        UIImage *image = [UIImage imageNamed:imageName];

        UIImageView *imageView = [[UIImageView alloc] initWithImage:image];

        // setup each frame to a default height and width, it will be properly placed when we call "updateScrollList"

        CGRect rect = imageView.frame;

        rect.size.height = kScrollObjHeight;

        rect.size.width = kScrollObjWidth;

        imageView.frame = rect;

        imageView.tag = i;  // tag our images for later use when we place them in serial fashion

        [scrollView1 addSubview:imageView];

        [imageView release];

    }

    [self layoutScrollImages];  // now place the photos in serial layout within the scrollview

    // 2. setup the scrollview for one image and add it to the view controller

    //

    [scrollView2 setBackgroundColor:[UIColor blackColor]];

    [scrollView2 setCanCancelContentTouches:NO];

    scrollView2.clipsToBounds = YES;    // default is NO, we want to restrict drawing within our scrollview

    scrollView2.indicatorStyle = UIScrollViewIndicatorStyleWhite;

    UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"image0.jpg"]];

    [scrollView2 addSubview:imageView];

    [scrollView2 setContentSize:CGSizeMake(imageView.frame.size.width, imageView.frame.size.height)];

    [scrollView2 setScrollEnabled:YES];

    [imageView release];

}

- (void)dealloc

{   

    [scrollView1 release];

    [scrollView2 release];

    [super dealloc];

}

- (void)didReceiveMemoryWarning

{

    // invoke super's implementation to do the Right Thing, but also release the input controller since we can do that  

    // In practice this is unlikely to be used in this application, and it would be of little benefit,

    // but the principle is the important thing.

    //

    [super didReceiveMemoryWarning];

}

@end