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//
// EGOImageView.m
// EGOImageLoading
//
// Created by Shaun Harrison on 9/15/09.
// Copyright (c) 2009-2010 enormego
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
#import "EGOImageView.h"
#import "EGOImageLoader.h"
@implementation EGOImageView
@synthesize imageURL, placeholderImage, delegate;
- (id)initWithPlaceholderImage:(UIImage*)anImage {
return [self initWithPlaceholderImage:anImage delegate:nil];
}
- (id)initWithPlaceholderImage:(UIImage*)anImage delegate:(id<EGOImageViewDelegate>)aDelegate {
if((self = [super initWithImage:anImage])) {
self.placeholderImage = anImage;
self.delegate = aDelegate;
}
return self;
}
- (void)setImageURL:(NSURL *)aURL {
if(imageURL) {
[[EGOImageLoader sharedImageLoader] removeObserver:self forURL:imageURL];
[imageURL release];
imageURL = nil;
}
if(!aURL) {
self.image = self.placeholderImage;
imageURL = nil;
return;
} else {
imageURL = [aURL retain];
}
[[EGOImageLoader sharedImageLoader] removeObserver:self];
UIImage* anImage = [[EGOImageLoader sharedImageLoader] imageForURL:aURL shouldLoadWithObserver:self];
if(anImage) {
self.image = anImage;
// trigger the delegate callback if the image was found in the cache
if([self.delegate respondsToSelector:@selector(imageViewLoadedImage:)]) {
[self.delegate imageViewLoadedImage:self];
}
} else {
self.image = self.placeholderImage;
}
}
#pragma mark -
#pragma mark Image loading
- (void)cancelImageLoad {
[[EGOImageLoader sharedImageLoader] cancelLoadForURL:self.imageURL];
[[EGOImageLoader sharedImageLoader] removeObserver:self forURL:self.imageURL];
}
- (void)imageLoaderDidLoad:(NSNotification*)notification {
if(![[[notification userInfo] objectForKey:@"imageURL"] isEqual:self.imageURL]) return;
UIImage* anImage = [[notification userInfo] objectForKey:@"image"];
self.image = anImage;
[self setNeedsDisplay];
if([self.delegate respondsToSelector:@selector(imageViewLoadedImage:)]) {
[self.delegate imageViewLoadedImage:self];
}
}
- (void)imageLoaderDidFailToLoad:(NSNotification*)notification {
if(![[[notification userInfo] objectForKey:@"imageURL"] isEqual:self.imageURL]) return;
if([self.delegate respondsToSelector:@selector(imageViewFailedToLoadImage:error:)]) {
[self.delegate imageViewFailedToLoadImage:self error:[[notification userInfo] objectForKey:@"error"]];
}
}
#pragma mark -
- (void)dealloc {
[[EGOImageLoader sharedImageLoader] removeObserver:self];
self.delegate = nil;
self.imageURL = nil;
self.placeholderImage = nil;
[super dealloc];
}
@end