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65 lines
2.2 KiB
Objective-C
65 lines
2.2 KiB
Objective-C
//
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// Copyright 2009-2010 Facebook
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#import <Foundation/Foundation.h>
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@protocol TTModel;
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@protocol TTModelDelegate <NSObject>
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@optional
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- (void)modelDidStartLoad:(id<TTModel>)model;
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- (void)modelDidFinishLoad:(id<TTModel>)model;
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- (void)model:(id<TTModel>)model didFailLoadWithError:(NSError*)error;
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- (void)modelDidCancelLoad:(id<TTModel>)model;
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/**
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* Informs the delegate that the model has changed in some fundamental way.
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*
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* The change is not described specifically, so the delegate must assume that the entire
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* contents of the model may have changed, and react almost as if it was given a new model.
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*/
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- (void)modelDidChange:(id<TTModel>)model;
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- (void)model:(id<TTModel>)model didUpdateObject:(id)object atIndexPath:(NSIndexPath*)indexPath;
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- (void)model:(id<TTModel>)model didInsertObject:(id)object atIndexPath:(NSIndexPath*)indexPath;
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- (void)model:(id<TTModel>)model didDeleteObject:(id)object atIndexPath:(NSIndexPath*)indexPath;
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/**
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* Informs the delegate that the model is about to begin a multi-stage update.
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*
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* Models should use this method to condense multiple updates into a single visible update.
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* This avoids having the view update multiple times for each change. Instead, the user will
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* only see the end result of all of your changes when you call modelDidEndUpdates.
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*/
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- (void)modelDidBeginUpdates:(id<TTModel>)model;
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/**
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* Informs the delegate that the model has completed a multi-stage update.
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*
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* The exact nature of the change is not specified, so the receiver should investigate the
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* new state of the model by examining its properties.
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*/
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- (void)modelDidEndUpdates:(id<TTModel>)model;
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@end
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