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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<div id="projectname">Nimbus
 <span id="projectnumber">0.9.2 - <a href="http://github.com/jverkoey/nimbus">Nimbus is proudly hosted on Github</a></span>
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<div class="title">src/networkimage/src/NINetworkImageView.m</div> </div>
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<div class="contents">
<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">//</span>
<a name="l00002"></a>00002 <span class="comment">// Copyright 2011 Jeff Verkoeyen</span>
<a name="l00003"></a>00003 <span class="comment">//</span>
<a name="l00004"></a>00004 <span class="comment">// Forked from Three20 June 15, 2011 - Copyright 2009-2011 Facebook</span>
<a name="l00005"></a>00005 <span class="comment">//</span>
<a name="l00006"></a>00006 <span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span>
<a name="l00007"></a>00007 <span class="comment">// you may not use this file except in compliance with the License.</span>
<a name="l00008"></a>00008 <span class="comment">// You may obtain a copy of the License at</span>
<a name="l00009"></a>00009 <span class="comment">//</span>
<a name="l00010"></a>00010 <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span>
<a name="l00011"></a>00011 <span class="comment">//</span>
<a name="l00012"></a>00012 <span class="comment">// Unless required by applicable law or agreed to in writing, software</span>
<a name="l00013"></a>00013 <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span>
<a name="l00014"></a>00014 <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
<a name="l00015"></a>00015 <span class="comment">// See the License for the specific language governing permissions and</span>
<a name="l00016"></a>00016 <span class="comment">// limitations under the License.</span>
<a name="l00017"></a>00017 <span class="comment">//</span>
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="preprocessor">#import "NINetworkImageView.h"</span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="preprocessor">#import "NimbusCore.h"</span>
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <span class="preprocessor">#import "NINetworkImageRequest.h"</span>
<a name="l00024"></a>00024
<a name="l00025"></a>00025
<a name="l00026"></a>00026
<a name="l00030"></a>00030 <span class="keyword">@interface </span><a class="code" href="interface_n_i_network_image_view.html" title="A network-enabled image view that consumes minimal amounts of memory.">NINetworkImageView</a>()
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="keyword">@property</span> (nonatomic, readwrite, retain) NSOperation* operation;
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="keyword">@property</span> (nonatomic, readwrite, copy) <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a>* <a class="code" href="interface_n_i_network_image_view.html#ad770af40e9cb2673b210c3f199f83210" title="The last path assigned to the image view.">lastPathToNetworkImage</a>;
<a name="l00035"></a>00035
<a name="l00036"></a>00036 <span class="keyword">@end</span>
<a name="l00037"></a>00037
<a name="l00038"></a>00038
<a name="l00042"></a>00042 <span class="keyword">@implementation </span><a class="code" href="interface_n_i_network_image_view.html" title="A network-enabled image view that consumes minimal amounts of memory.">NINetworkImageView</a>
<a name="l00043"></a>00043
<a name="l00044"></a>00044 <span class="keyword">@synthesize</span> operation = _operation;
<a name="l00045"></a>00045 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_network_image_view.html#ae89362b1efb1347953529ddec044787f" title="A flag for enabling the resizing of images for display.">sizeForDisplay</a> = _sizeForDisplay;
<a name="l00046"></a>00046 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_network_image_view.html#a00d2df629a934ac974a6b27a83b75ca3" title="Options for modifying the way images are cropped when scaling.">scaleOptions</a> = _scaleOptions;
<a name="l00047"></a>00047 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_network_image_view.html#a04b3e01db91e87205984e10babc601be" title="The interpolation quality to use when resizing the image.">interpolationQuality</a> = _interpolationQuality;
<a name="l00048"></a>00048 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_network_image_view.html#a797e8d53348de870b8471e020d1babca" title="The image memory cache used by this image view to store the image in memory.">imageMemoryCache</a> = _imageMemoryCache;
<a name="l00049"></a>00049 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_network_image_view.html#ac5182e8400d566e77764d9314a1128d5" title="The network operation queue used by this image view to load the image from network and disk...">networkOperationQueue</a> = _networkOperationQueue;
<a name="l00050"></a>00050 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_network_image_view.html#aa3100ac85be1d2eff7ed3e5d24dcfcba" title="The maximum amount of time that an image will stay in memory after the request completes.">maxAge</a> = _maxAge;
<a name="l00051"></a>00051 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_network_image_view.html#a3dc0b8d1ba6db1eb96a3645f06f99b6a" title="The image being displayed while the network image is being fetched.">initialImage</a> = _initialImage;
<a name="l00052"></a>00052 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_network_image_view.html#a3f93f09bc3843a75f9ccce303a847b1b" title="A prefix for the memory cache key.">memoryCachePrefix</a> = _memoryCachePrefix;
<a name="l00053"></a>00053 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_network_image_view.html#ad770af40e9cb2673b210c3f199f83210" title="The last path assigned to the image view.">lastPathToNetworkImage</a> = _lastPathToNetworkImage;
<a name="l00054"></a>00054 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_network_image_view.html#a763e5fdecb23fa0708f2fab957d1090c" title="Delegate for state change notifications.">delegate</a> = _delegate;
<a name="l00055"></a>00055
<a name="l00056"></a>00056
<a name="l00058"></a>00058 - (void)cancelOperation {
<a name="l00059"></a>00059 <span class="keywordflow">if</span> ([<span class="keyword">self</span>.operation isKindOfClass:[<a class="code" href="interface_n_i_operation.html" title="A base implementation of an NSOperation that supports traditional delegation and blocks.">NIOperation</a> <span class="keyword">class</span>]]) {
<a name="l00060"></a>00060 NIOperation* request = (NIOperation *)<span class="keyword">self</span>.operation;
<a name="l00061"></a>00061 <span class="comment">// Clear the delegate so that we don't receive a didFail notification when we cancel the</span>
<a name="l00062"></a>00062 <span class="comment">// operation.</span>
<a name="l00063"></a>00063 request.<a class="code" href="interface_n_i_operation.html#af4051a42c46f1ddb9d308daf9596c40d" title="The delegate through which changes are notified for this operation.">delegate</a> = nil;
<a name="l00064"></a>00064 }
<a name="l00065"></a>00065 [<span class="keyword">self</span>.operation cancel];
<a name="l00066"></a>00066 }
<a name="l00067"></a>00067
<a name="l00068"></a>00068
<a name="l00070"></a>00070 - (void)dealloc {
<a name="l00071"></a>00071 [<span class="keyword">self</span> cancelOperation];
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <a class="code" href="group___preprocessor-_macros.html#ga5d2e99251aeb3ddb687e27f72336e5db" title="Release and assign nil to an object.">NI_RELEASE_SAFELY</a>(_operation);
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <a class="code" href="group___preprocessor-_macros.html#ga5d2e99251aeb3ddb687e27f72336e5db" title="Release and assign nil to an object.">NI_RELEASE_SAFELY</a>(_initialImage);
<a name="l00076"></a>00076
<a name="l00077"></a>00077 <a class="code" href="group___preprocessor-_macros.html#ga5d2e99251aeb3ddb687e27f72336e5db" title="Release and assign nil to an object.">NI_RELEASE_SAFELY</a>(_imageMemoryCache);
<a name="l00078"></a>00078 <a class="code" href="group___preprocessor-_macros.html#ga5d2e99251aeb3ddb687e27f72336e5db" title="Release and assign nil to an object.">NI_RELEASE_SAFELY</a>(_networkOperationQueue);
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <a class="code" href="group___preprocessor-_macros.html#ga5d2e99251aeb3ddb687e27f72336e5db" title="Release and assign nil to an object.">NI_RELEASE_SAFELY</a>(_memoryCachePrefix);
<a name="l00081"></a>00081
<a name="l00082"></a>00082 <a class="code" href="group___preprocessor-_macros.html#ga5d2e99251aeb3ddb687e27f72336e5db" title="Release and assign nil to an object.">NI_RELEASE_SAFELY</a>(_lastPathToNetworkImage);
<a name="l00083"></a>00083
<a name="l00084"></a>00084 [<span class="keyword">super</span> dealloc];
<a name="l00085"></a>00085 }
<a name="l00086"></a>00086
<a name="l00087"></a>00087
<a name="l00089"></a>00089 - (void)assignDefaults {
<a name="l00090"></a>00090 <span class="keyword">self</span>.sizeForDisplay = YES;
<a name="l00091"></a>00091 <span class="keyword">self</span>.scaleOptions = NINetworkImageViewScaleToFitLeavesExcessAndScaleToFillCropsExcess;
<a name="l00092"></a>00092 <span class="keyword">self</span>.interpolationQuality = kCGInterpolationDefault;
<a name="l00093"></a>00093
<a name="l00094"></a>00094 <span class="keyword">self</span>.imageMemoryCache = [<a class="code" href="interface_nimbus.html" title="The Nimbus state interface.">Nimbus</a> <a class="code" href="interface_nimbus.html#a3c0417e0cf4a64e6d8004346fc744ce3" title="Access the global image memory cache.">imageMemoryCache</a>];
<a name="l00095"></a>00095 <span class="keyword">self</span>.networkOperationQueue = [<a class="code" href="interface_nimbus.html" title="The Nimbus state interface.">Nimbus</a> <a class="code" href="interface_nimbus.html#a1b76dec78c8c30a174aaea7a6f859b8e" title="Access the global network operation queue.">networkOperationQueue</a>];
<a name="l00096"></a>00096 }
<a name="l00097"></a>00097
<a name="l00098"></a>00098
<a name="l00100"></a><a class="code" href="interface_n_i_network_image_view.html#ade5eba04aa860207d1fbd07a3f3a31ef">00100</a> - (id)initWithImage:(UIImage *)image {
<a name="l00101"></a>00101 <span class="keywordflow">if</span> ((<span class="keyword">self</span> = [super initWithImage:image])) {
<a name="l00102"></a>00102 [<span class="keyword">self</span> assignDefaults];
<a name="l00103"></a>00103
<a name="l00104"></a>00104 <span class="comment">// Retain the initial image.</span>
<a name="l00105"></a>00105 <span class="keyword">self</span>.initialImage = image;
<a name="l00106"></a>00106 }
<a name="l00107"></a>00107 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00108"></a>00108 }
<a name="l00109"></a>00109
<a name="l00110"></a>00110
<a name="l00112"></a>00112 - (id)initWithFrame:(CGRect)frame {
<a name="l00113"></a>00113 <span class="keywordflow">if</span> ((<span class="keyword">self</span> = [<span class="keyword">self</span> initWithImage:nil])) {
<a name="l00114"></a>00114 <span class="keyword">self</span>.frame = frame;
<a name="l00115"></a>00115 }
<a name="l00116"></a>00116 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00117"></a>00117 }
<a name="l00118"></a>00118
<a name="l00119"></a>00119
<a name="l00121"></a>00121 - (id)initWithCoder:(NSCoder *)aDecoder {
<a name="l00122"></a>00122 <span class="keywordflow">if</span> ((<span class="keyword">self</span> = [super initWithCoder:aDecoder])) {
<a name="l00123"></a>00123 <span class="keywordflow">if</span> (nil != <span class="keyword">self</span>.image) {
<a name="l00124"></a>00124 <span class="keyword">self</span>.initialImage = <span class="keyword">self</span>.image;
<a name="l00125"></a>00125 }
<a name="l00126"></a>00126 [<span class="keyword">self</span> assignDefaults];
<a name="l00127"></a>00127 }
<a name="l00128"></a>00128 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130
<a name="l00131"></a>00131
<a name="l00133"></a>00133 - (id)init {
<a name="l00134"></a>00134 <span class="keywordflow">return</span> [<span class="keyword">self</span> initWithImage:nil];
<a name="l00135"></a>00135 }
<a name="l00136"></a>00136
<a name="l00137"></a>00137
<a name="l00139"></a>00139 - (<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)cacheKeyForCacheIdentifier:(<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)cacheIdentifier
<a name="l00140"></a>00140 imageSize:(CGSize)imageSize
<a name="l00141"></a>00141 contentMode:(UIViewContentMode)contentMode
<a name="l00142"></a>00142 scaleOptions:(<a class="code" href="group___network-_image-_user-_interface.html#ga44d338b3b1eae1d2a3bb8fd985acf856" title="Flags for modifying the way cropping is handled when scaling images to fit or fill.">NINetworkImageViewScaleOptions</a>)scaleOptions {
<a name="l00143"></a>00143 NIDASSERT(<a class="code" href="group___non-_empty-_collection-_testing.html#ga8a7eaa0c885803d11397e454631cc175" title="Tests if an object is a non-nil string which is not empty.">NIIsStringWithAnyText</a>(cacheIdentifier));
<a name="l00144"></a>00144
<a name="l00145"></a>00145 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a>* cacheKey = cacheIdentifier;
<a name="l00146"></a>00146
<a name="l00147"></a>00147 <span class="comment">// Prefix cache key to create a namespace.</span>
<a name="l00148"></a>00148 <span class="keywordflow">if</span> (nil != <span class="keyword">self</span>.<a class="code" href="interface_n_i_network_image_view.html#a3f93f09bc3843a75f9ccce303a847b1b" title="A prefix for the memory cache key.">memoryCachePrefix</a>) {
<a name="l00149"></a>00149 cacheKey = [<span class="keyword">self</span>.memoryCachePrefix stringByAppendingString:cacheKey];
<a name="l00150"></a>00150 }
<a name="l00151"></a>00151
<a name="l00152"></a>00152 <span class="comment">// Append the size to the key. This allows us to differentiate cache keys by image dimension.</span>
<a name="l00153"></a>00153 <span class="comment">// If the display size ever changes, we want to ensure that we're fetching the correct image</span>
<a name="l00154"></a>00154 <span class="comment">// from the cache.</span>
<a name="l00155"></a>00155 <span class="keywordflow">if</span> (<span class="keyword">self</span>.<a class="code" href="interface_n_i_network_image_view.html#ae89362b1efb1347953529ddec044787f" title="A flag for enabling the resizing of images for display.">sizeForDisplay</a>) {
<a name="l00156"></a>00156 cacheKey = [cacheKey stringByAppendingFormat:@"%@{%d,%d}",
<a name="l00157"></a>00157 NSStringFromCGSize(imageSize), contentMode, scaleOptions];
<a name="l00158"></a>00158 }
<a name="l00159"></a>00159
<a name="l00160"></a>00160 <span class="comment">// The resulting cache key will look like:</span>
<a name="l00161"></a>00161 <span class="comment">// (memoryCachePrefix)/path/to/image({width,height}{contentMode,cropImageForDisplay})</span>
<a name="l00162"></a>00162
<a name="l00163"></a>00163 <span class="keywordflow">return</span> cacheKey;
<a name="l00164"></a>00164 }
<a name="l00165"></a>00165
<a name="l00166"></a>00166
<a name="l00169"></a>00169 <span class="preprocessor">#pragma mark -</span>
<a name="l00170"></a>00170 <span class="preprocessor"></span><span class="preprocessor">#pragma mark Internal consistent implementation of state changes</span>
<a name="l00171"></a>00171 <span class="preprocessor"></span>
<a name="l00172"></a>00172
<a name="l00174"></a>00174 - (void)_didStartLoading {
<a name="l00175"></a>00175 <span class="keywordflow">if</span> ([<span class="keyword">self</span>.<a class="code" href="interface_n_i_network_image_view.html#a763e5fdecb23fa0708f2fab957d1090c" title="Delegate for state change notifications.">delegate</a> respondsToSelector:<span class="keyword">@selector</span>(networkImageViewDidStartLoad:)]) {
<a name="l00176"></a>00176 [<span class="keyword">self</span>.delegate networkImageViewDidStartLoad:self];
<a name="l00177"></a>00177 }
<a name="l00178"></a>00178
<a name="l00179"></a>00179 [<span class="keyword">self</span> networkImageViewDidStartLoading];
<a name="l00180"></a>00180 }
<a name="l00181"></a>00181
<a name="l00182"></a>00182
<a name="l00184"></a>00184 - (void)_didFinishLoadingWithImage: (UIImage *)image
<a name="l00185"></a>00185 cacheIdentifier: (<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)cacheIdentifier
<a name="l00186"></a>00186 displaySize: (CGSize)displaySize
<a name="l00187"></a>00187 contentMode: (UIViewContentMode)contentMode
<a name="l00188"></a>00188 scaleOptions: (<a class="code" href="group___network-_image-_user-_interface.html#ga44d338b3b1eae1d2a3bb8fd985acf856" title="Flags for modifying the way cropping is handled when scaling images to fit or fill.">NINetworkImageViewScaleOptions</a>)scaleOptions
<a name="l00189"></a>00189 expirationDate: (NSDate *)expirationDate {
<a name="l00190"></a>00190 <span class="comment">// Store the result image in the memory cache.</span>
<a name="l00191"></a>00191 <span class="keywordflow">if</span> (nil != <span class="keyword">self</span>.<a class="code" href="interface_n_i_network_image_view.html#a797e8d53348de870b8471e020d1babca" title="The image memory cache used by this image view to store the image in memory.">imageMemoryCache</a>) {
<a name="l00192"></a>00192 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a>* cacheKey = [<span class="keyword">self</span> cacheKeyForCacheIdentifier:cacheIdentifier
<a name="l00193"></a>00193 imageSize:displaySize
<a name="l00194"></a>00194 contentMode:contentMode
<a name="l00195"></a>00195 scaleOptions:scaleOptions];
<a name="l00196"></a>00196
<a name="l00197"></a>00197 <span class="comment">// Store the image in the memory cache, possibly with an expiration date.</span>
<a name="l00198"></a>00198 [<span class="keyword">self</span>.imageMemoryCache storeObject: image
<a name="l00199"></a>00199 withName: cacheKey
<a name="l00200"></a>00200 expiresAfter: expirationDate];
<a name="l00201"></a>00201 }
<a name="l00202"></a>00202
<a name="l00203"></a>00203 <span class="comment">// Display the new image.</span>
<a name="l00204"></a>00204 [<span class="keyword">self</span> setImage:image];
<a name="l00205"></a>00205
<a name="l00206"></a>00206 <span class="keyword">self</span>.operation = nil;
<a name="l00207"></a>00207
<a name="l00208"></a>00208 <span class="keywordflow">if</span> ([<span class="keyword">self</span>.<a class="code" href="interface_n_i_network_image_view.html#a763e5fdecb23fa0708f2fab957d1090c" title="Delegate for state change notifications.">delegate</a> respondsToSelector:<span class="keyword">@selector</span>(networkImageView:didLoadImage:)]) {
<a name="l00209"></a>00209 [<span class="keyword">self</span>.delegate networkImageView:self didLoadImage:self.image];
<a name="l00210"></a>00210 }
<a name="l00211"></a>00211
<a name="l00212"></a>00212 [<span class="keyword">self</span> networkImageViewDidLoadImage:image];
<a name="l00213"></a>00213 }
<a name="l00214"></a>00214
<a name="l00215"></a>00215
<a name="l00217"></a>00217 - (void)_didFailToLoadWithError:(NSError *)error {
<a name="l00218"></a>00218 <span class="keyword">self</span>.operation = nil;
<a name="l00219"></a>00219
<a name="l00220"></a>00220 [<span class="keyword">self</span> networkImageViewDidFailToLoad:error];
<a name="l00221"></a>00221 }
<a name="l00222"></a>00222
<a name="l00223"></a>00223
<a name="l00226"></a>00226 <span class="preprocessor">#pragma mark -</span>
<a name="l00227"></a>00227 <span class="preprocessor"></span><span class="preprocessor">#pragma mark NIOperationDelegate</span>
<a name="l00228"></a>00228 <span class="preprocessor"></span>
<a name="l00229"></a>00229
<a name="l00231"></a>00231 - (void)operationDidStart:(NSOperation *)operation {
<a name="l00232"></a>00232 [<span class="keyword">self</span> _didStartLoading];
<a name="l00233"></a>00233 }
<a name="l00234"></a>00234
<a name="l00235"></a>00235
<a name="l00237"></a>00237 - (void)operationDidFinish:(<a class="code" href="interface_n_i_network_image_request.html" title="A threaded network request for an image that chops up and resizes the image before returning to the U...">NINetworkImageRequest</a> *)operation {
<a name="l00238"></a>00238 [<span class="keyword">self</span> _didFinishLoadingWithImage:operation.imageCroppedAndSizedForDisplay
<a name="l00239"></a>00239 cacheIdentifier:operation.cacheIdentifier
<a name="l00240"></a>00240 displaySize:operation.imageDisplaySize
<a name="l00241"></a>00241 contentMode:operation.imageContentMode
<a name="l00242"></a>00242 scaleOptions:operation.scaleOptions
<a name="l00243"></a>00243 expirationDate:nil];
<a name="l00244"></a>00244 }
<a name="l00245"></a>00245
<a name="l00246"></a>00246
<a name="l00248"></a>00248 - (void)operationDidFail:(NSOperation *)operation withError:(NSError *)error {
<a name="l00249"></a>00249 [<span class="keyword">self</span> _didFailToLoadWithError:error];
<a name="l00250"></a>00250 }
<a name="l00251"></a>00251
<a name="l00252"></a>00252
<a name="l00255"></a>00255 <span class="preprocessor">#pragma mark -</span>
<a name="l00256"></a>00256 <span class="preprocessor"></span><span class="preprocessor">#pragma mark Subclassing</span>
<a name="l00257"></a>00257 <span class="preprocessor"></span>
<a name="l00258"></a>00258
<a name="l00260"></a><a class="code" href="interface_n_i_network_image_view.html#aece340a22833f7a7ceeac8ffc8aa5cb4">00260</a> - (void)<a class="code" href="interface_n_i_network_image_view.html#aece340a22833f7a7ceeac8ffc8aa5cb4" title="A network request has begun.">networkImageViewDidStartLoading</a> {
<a name="l00261"></a>00261 <span class="comment">// No-op. Meant to be overridden.</span>
<a name="l00262"></a>00262 }
<a name="l00263"></a>00263
<a name="l00264"></a>00264
<a name="l00266"></a><a class="code" href="interface_n_i_network_image_view.html#a5fa24c4b0e7aeda332861b681c902c78">00266</a> - (void)networkImageViewDidLoadImage:(UIImage *)image {
<a name="l00267"></a>00267 <span class="comment">// No-op. Meant to be overridden.</span>
<a name="l00268"></a>00268 }
<a name="l00269"></a>00269
<a name="l00270"></a>00270
<a name="l00272"></a><a class="code" href="interface_n_i_network_image_view.html#ac6b87d3157c16038705df537e9624a89">00272</a> - (void)networkImageViewDidFailToLoad:(NSError *)error {
<a name="l00273"></a>00273 <span class="comment">// No-op. Meant to be overridden.</span>
<a name="l00274"></a>00274 }
<a name="l00275"></a>00275
<a name="l00276"></a>00276
<a name="l00279"></a>00279 <span class="preprocessor">#pragma mark -</span>
<a name="l00280"></a>00280 <span class="preprocessor"></span><span class="preprocessor">#pragma mark Public Methods</span>
<a name="l00281"></a>00281 <span class="preprocessor"></span>
<a name="l00282"></a>00282
<a name="l00284"></a><a class="code" href="interface_n_i_network_image_view.html#af0531138d9eb4de6275b3704b7e293c2">00284</a> - (void)setPathToNetworkImage:(<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)pathToNetworkImage {
<a name="l00285"></a>00285 [<span class="keyword">self</span> <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">setPathToNetworkImage</a>: pathToNetworkImage
<a name="l00286"></a>00286 <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">forDisplaySize</a>: CGSizeZero
<a name="l00287"></a>00287 <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">contentMode</a>: self.contentMode
<a name="l00288"></a>00288 <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">cropRect</a>: CGRectZero];
<a name="l00289"></a>00289 }
<a name="l00290"></a>00290
<a name="l00291"></a>00291
<a name="l00293"></a><a class="code" href="interface_n_i_network_image_view.html#aafcf782b4bbcbd2d40b1693bca72b67a">00293</a> - (void)setPathToNetworkImage:(<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)pathToNetworkImage forDisplaySize:(CGSize)displaySize {
<a name="l00294"></a>00294 [<span class="keyword">self</span> <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">setPathToNetworkImage</a>: pathToNetworkImage
<a name="l00295"></a>00295 <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">forDisplaySize</a>: displaySize
<a name="l00296"></a>00296 <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">contentMode</a>: self.contentMode
<a name="l00297"></a>00297 <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">cropRect</a>: CGRectZero];
<a name="l00298"></a>00298 }
<a name="l00299"></a>00299
<a name="l00300"></a>00300
<a name="l00302"></a><a class="code" href="interface_n_i_network_image_view.html#a0fe80155480019a31d7be5d3d8ae07ca">00302</a> - (void)setPathToNetworkImage:(<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)pathToNetworkImage forDisplaySize:(CGSize)displaySize contentMode:(UIViewContentMode)contentMode {
<a name="l00303"></a>00303 [<span class="keyword">self</span> <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">setPathToNetworkImage</a>: pathToNetworkImage
<a name="l00304"></a>00304 <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">forDisplaySize</a>: displaySize
<a name="l00305"></a>00305 <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">contentMode</a>: contentMode
<a name="l00306"></a>00306 <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">cropRect</a>: CGRectZero];
<a name="l00307"></a>00307 }
<a name="l00308"></a>00308
<a name="l00309"></a>00309
<a name="l00311"></a><a class="code" href="interface_n_i_network_image_view.html#a41b5c535e5b5f4a08b227e58485deda5">00311</a> - (void)setPathToNetworkImage:(<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)pathToNetworkImage cropRect:(CGRect)cropRect {
<a name="l00312"></a>00312 [<span class="keyword">self</span> <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">setPathToNetworkImage</a>: pathToNetworkImage
<a name="l00313"></a>00313 <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">forDisplaySize</a>: CGSizeZero
<a name="l00314"></a>00314 <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">contentMode</a>: self.contentMode
<a name="l00315"></a>00315 <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">cropRect</a>: cropRect];
<a name="l00316"></a>00316 }
<a name="l00317"></a>00317
<a name="l00318"></a>00318
<a name="l00320"></a><a class="code" href="interface_n_i_network_image_view.html#ab78dcad711ea2fe46ace504e33f15944">00320</a> - (void)setPathToNetworkImage:(<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)pathToNetworkImage contentMode:(UIViewContentMode)contentMode {
<a name="l00321"></a>00321 [<span class="keyword">self</span> <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">setPathToNetworkImage</a>: pathToNetworkImage
<a name="l00322"></a>00322 <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">forDisplaySize</a>: CGSizeZero
<a name="l00323"></a>00323 <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">contentMode</a>: contentMode
<a name="l00324"></a>00324 <a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d" title="Load an image from the network with a specific display size and crop rect.">cropRect</a>: CGRectZero];
<a name="l00325"></a>00325 }
<a name="l00326"></a>00326
<a name="l00327"></a>00327
<a name="l00329"></a><a class="code" href="interface_n_i_network_image_view.html#af5d994d1815d398b875437523869971d">00329</a> - (void)setPathToNetworkImage:(<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)pathToNetworkImage forDisplaySize:(CGSize)displaySize contentMode:(UIViewContentMode)contentMode cropRect:(CGRect)cropRect {
<a name="l00330"></a>00330 [<span class="keyword">self</span> cancelOperation];
<a name="l00331"></a>00331
<a name="l00332"></a>00332 <span class="keywordflow">if</span> (<a class="code" href="group___non-_empty-_collection-_testing.html#ga8a7eaa0c885803d11397e454631cc175" title="Tests if an object is a non-nil string which is not empty.">NIIsStringWithAnyText</a>(pathToNetworkImage)) {
<a name="l00333"></a>00333 <span class="keyword">self</span>.lastPathToNetworkImage = pathToNetworkImage;
<a name="l00334"></a>00334
<a name="l00335"></a>00335 NSURL* url = nil;
<a name="l00336"></a>00336
<a name="l00337"></a>00337 <span class="comment">// Check for file URLs.</span>
<a name="l00338"></a>00338 <span class="keywordflow">if</span> ([pathToNetworkImage hasPrefix:<span class="stringliteral">@"/"</span>]) {
<a name="l00339"></a>00339 <span class="comment">// If the url starts with / then it's likely a file URL, so treat it accordingly.</span>
<a name="l00340"></a>00340 url = [NSURL fileURLWithPath:pathToNetworkImage];
<a name="l00341"></a>00341
<a name="l00342"></a>00342 } <span class="keywordflow">else</span> {
<a name="l00343"></a>00343 <span class="comment">// Otherwise we assume it's a regular URL.</span>
<a name="l00344"></a>00344 url = [NSURL URLWithString:pathToNetworkImage];
<a name="l00345"></a>00345 }
<a name="l00346"></a>00346
<a name="l00347"></a>00347 <span class="comment">// If the URL failed to be created, there's not much we can do here.</span>
<a name="l00348"></a>00348 <span class="keywordflow">if</span> (nil == url) {
<a name="l00349"></a>00349 <span class="keywordflow">return</span>;
<a name="l00350"></a>00350 }
<a name="l00351"></a>00351
<a name="l00352"></a>00352 <a class="code" href="interface_n_i_network_image_request.html" title="A threaded network request for an image that chops up and resizes the image before returning to the U...">NINetworkImageRequest</a>* request = [[[<a class="code" href="interface_n_i_network_image_request.html" title="A threaded network request for an image that chops up and resizes the image before returning to the U...">NINetworkImageRequest</a> alloc] initWithURL:url] autorelease];
<a name="l00353"></a>00353 [<span class="keyword">self</span> setNetworkImageOperation:request forDisplaySize:displaySize contentMode:contentMode cropRect:cropRect];
<a name="l00354"></a>00354 }
<a name="l00355"></a>00355 }
<a name="l00356"></a>00356
<a name="l00357"></a>00357
<a name="l00359"></a>00359 - (void)setNetworkImageOperation:(<a class="code" href="interface_n_i_operation.html" title="A base implementation of an NSOperation that supports traditional delegation and blocks.">NIOperation</a><<a class="code" href="protocol_n_i_network_image_operation-p.html" title="A protocol defining the set of characteristics for an operation to be used with NINetworkImageView.">NINetworkImageOperation</a>> *)operation forDisplaySize:(CGSize)displaySize contentMode:(UIViewContentMode)contentMode cropRect:(CGRect)cropRect {
<a name="l00360"></a>00360 [<span class="keyword">self</span> cancelOperation];
<a name="l00361"></a>00361
<a name="l00362"></a>00362 <span class="keywordflow">if</span> (nil != operation) {
<a name="l00363"></a>00363 <span class="comment">// We explicitly do not allow negative display sizes. Check the call stack to figure</span>
<a name="l00364"></a>00364 <span class="comment">// out who is providing a negative display size. It's possible that displaySize is an</span>
<a name="l00365"></a>00365 <span class="comment">// uninitialized CGSize structure.</span>
<a name="l00366"></a>00366 NIDASSERT(displaySize.width >= 0);
<a name="l00367"></a>00367 NIDASSERT(displaySize.height >= 0);
<a name="l00368"></a>00368
<a name="l00369"></a>00369 <span class="comment">// If an invalid display size is provided, use the image view's frame instead.</span>
<a name="l00370"></a>00370 <span class="keywordflow">if</span> (0 >= displaySize.width || 0 >= displaySize.height) {
<a name="l00371"></a>00371 displaySize = <span class="keyword">self</span>.frame.size;
<a name="l00372"></a>00372 }
<a name="l00373"></a>00373
<a name="l00374"></a>00374 UIImage* image = nil;
<a name="l00375"></a>00375
<a name="l00376"></a>00376 <span class="comment">// Attempt to load the image from memory first.</span>
<a name="l00377"></a>00377 <span class="keywordflow">if</span> (nil != <span class="keyword">self</span>.<a class="code" href="interface_n_i_network_image_view.html#a797e8d53348de870b8471e020d1babca" title="The image memory cache used by this image view to store the image in memory.">imageMemoryCache</a>) {
<a name="l00378"></a>00378 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a>* cacheKey = [<span class="keyword">self</span> cacheKeyForCacheIdentifier:operation.cacheIdentifier
<a name="l00379"></a>00379 imageSize:displaySize
<a name="l00380"></a>00380 contentMode:contentMode
<a name="l00381"></a>00381 scaleOptions:self.scaleOptions];
<a name="l00382"></a>00382 image = [<span class="keyword">self</span>.imageMemoryCache objectWithName:cacheKey];
<a name="l00383"></a>00383 }
<a name="l00384"></a>00384
<a name="l00385"></a>00385 <span class="keywordflow">if</span> (nil != image) {
<a name="l00386"></a>00386 <span class="comment">// We successfully loaded the image from memory.</span>
<a name="l00387"></a>00387 [<span class="keyword">self</span> setImage:image];
<a name="l00388"></a>00388
<a name="l00389"></a>00389 <span class="keywordflow">if</span> ([<span class="keyword">self</span>.<a class="code" href="interface_n_i_network_image_view.html#a763e5fdecb23fa0708f2fab957d1090c" title="Delegate for state change notifications.">delegate</a> respondsToSelector:<span class="keyword">@selector</span>(networkImageView:didLoadImage:)]) {
<a name="l00390"></a>00390 [<span class="keyword">self</span>.delegate networkImageView:self didLoadImage:self.image];
<a name="l00391"></a>00391 }
<a name="l00392"></a>00392
<a name="l00393"></a>00393 [<span class="keyword">self</span> networkImageViewDidLoadImage:image];
<a name="l00394"></a>00394
<a name="l00395"></a>00395 } <span class="keywordflow">else</span> {
<a name="l00396"></a>00396 <span class="comment">// Unable to load the image from memory, so let's fire off the operation now.</span>
<a name="l00397"></a>00397 operation.delegate = <span class="keyword">self</span>;
<a name="l00398"></a>00398
<a name="l00399"></a>00399 operation.imageCropRect = cropRect;
<a name="l00400"></a>00400 operation.scaleOptions = <span class="keyword">self</span>.scaleOptions;
<a name="l00401"></a>00401 operation.interpolationQuality = <span class="keyword">self</span>.interpolationQuality;
<a name="l00402"></a>00402 <span class="keywordflow">if</span> (<span class="keyword">self</span>.<a class="code" href="interface_n_i_network_image_view.html#ae89362b1efb1347953529ddec044787f" title="A flag for enabling the resizing of images for display.">sizeForDisplay</a>) {
<a name="l00403"></a>00403 operation.imageDisplaySize = displaySize;
<a name="l00404"></a>00404 operation.imageContentMode = contentMode;
<a name="l00405"></a>00405 }
<a name="l00406"></a>00406
<a name="l00407"></a>00407 <span class="keyword">self</span>.operation = operation;
<a name="l00408"></a>00408
<a name="l00409"></a>00409 [<span class="keyword">self</span>.networkOperationQueue addOperation:self.operation];
<a name="l00410"></a>00410 }
<a name="l00411"></a>00411 }
<a name="l00412"></a>00412 }
<a name="l00413"></a>00413
<a name="l00414"></a>00414
<a name="l00416"></a><a class="code" href="interface_n_i_network_image_view.html#a7cce26c40c058f1c8b7265b971b2abc5">00416</a> - (void)<a class="code" href="interface_n_i_network_image_view.html#a7cce26c40c058f1c8b7265b971b2abc5" title="Kill any network requests and replace the displayed image with the initial image.">prepareForReuse</a> {
<a name="l00417"></a>00417 [<span class="keyword">self</span> cancelOperation];
<a name="l00418"></a>00418
<a name="l00419"></a>00419 [<span class="keyword">self</span> setImage:self.initialImage];
<a name="l00420"></a>00420 }
<a name="l00421"></a>00421
<a name="l00422"></a>00422
<a name="l00425"></a>00425 <span class="preprocessor">#pragma mark -</span>
<a name="l00426"></a>00426 <span class="preprocessor"></span><span class="preprocessor">#pragma mark Properties</span>
<a name="l00427"></a>00427 <span class="preprocessor"></span>
<a name="l00428"></a>00428
<a name="l00430"></a>00430 - (void)setInitialImage:(UIImage *)initialImage {
<a name="l00431"></a>00431 <span class="keywordflow">if</span> (_initialImage != initialImage) {
<a name="l00432"></a>00432 BOOL updateViewImage = (_initialImage == <span class="keyword">self</span>.image);
<a name="l00433"></a>00433 [_initialImage release];
<a name="l00434"></a>00434 _initialImage = [initialImage retain];
<a name="l00435"></a>00435
<a name="l00436"></a>00436 <span class="keywordflow">if</span> (updateViewImage) {
<a name="l00437"></a>00437 [<span class="keyword">self</span> setImage:_initialImage];
<a name="l00438"></a>00438 }
<a name="l00439"></a>00439 }
<a name="l00440"></a>00440 }
<a name="l00441"></a>00441
<a name="l00442"></a>00442
<a name="l00444"></a>00444 - (BOOL)isLoading {
<a name="l00445"></a>00445 <span class="keywordflow">return</span> nil != <span class="keyword">self</span>.operation;
<a name="l00446"></a>00446 }
<a name="l00447"></a>00447
<a name="l00448"></a>00448
<a name="l00450"></a>00450 - (void)setNetworkOperationQueue:(NSOperationQueue *)queue {
<a name="l00451"></a>00451 <span class="comment">// Don't allow a nil network operation queue.</span>
<a name="l00452"></a>00452 NIDASSERT(nil != queue);
<a name="l00453"></a>00453 <span class="keywordflow">if</span> (nil == queue) {
<a name="l00454"></a>00454 queue = [<a class="code" href="interface_nimbus.html" title="The Nimbus state interface.">Nimbus</a> <a class="code" href="interface_nimbus.html#a1b76dec78c8c30a174aaea7a6f859b8e" title="Access the global network operation queue.">networkOperationQueue</a>];
<a name="l00455"></a>00455 }
<a name="l00456"></a>00456 <span class="keywordflow">if</span> (queue != _networkOperationQueue) {
<a name="l00457"></a>00457 [_networkOperationQueue release];
<a name="l00458"></a>00458 _networkOperationQueue = [queue retain];
<a name="l00459"></a>00459 }
<a name="l00460"></a>00460 }
<a name="l00461"></a>00461
<a name="l00462"></a>00462
<a name="l00463"></a>00463 <span class="keyword">@end</span>
<a name="l00464"></a>00464
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