/*

     File: ThumbImageView.h

 Abstract: UIImageView subclass to display a thumbnail image; notifies a delegate of various interactions.

  Version: 1.1

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 */

@protocol ThumbImageViewDelegate;

@interface ThumbImageView : UIImageView {

    id <ThumbImageViewDelegate> delegate;

    NSString *imageName;

    /* ThumbImageViews have a "home," which is their location in the containing scroll view. Keeping this distinct */

    /* from their frame makes it easier to handle dragging and reordering them. We can change their relative       */

    /* positions by changing their homes, without having to worry about whether they have currently been dragged   */

    /* somewhere else. Also, we don't lose track of where they belong while they are being moved.                  */

    CGRect home;

    BOOL dragging;

    CGPoint touchLocation; // Location of touch in own coordinates (stays constant during dragging).

}

@property (nonatomic, assign) id <ThumbImageViewDelegate> delegate;

@property (nonatomic, retain) NSString *imageName;

@property (nonatomic, assign) CGRect home;

@property (nonatomic, assign) CGPoint touchLocation;

- (void)goHome;  // animates return to home location

- (void)moveByOffset:(CGPoint)offset; // change frame lo

@end

@protocol ThumbImageViewDelegate <NSObject>

@optional

- (void)thumbImageViewWasTapped:(ThumbImageView *)tiv;

- (void)thumbImageViewStartedTracking:(ThumbImageView *)tiv;

- (void)thumbImageViewMoved:(ThumbImageView *)tiv;

- (void)thumbImageViewStoppedTracking:(ThumbImageView *)tiv;

@end