jens@0: //
jens@0: //  KVUtils.h
jens@0: //  MYUtilities
jens@0: //
jens@0: //  Created by Jens Alfke on 2/25/08.
jens@0: //  Copyright 2008 Jens Alfke. All rights reserved.
jens@0: //
jens@0: 
jens@0: #import <Cocoa/Cocoa.h>
jens@0: 
jens@0: 
jens@0: enum {
jens@0:     MYKeyValueObservingOptionOnce = 1<<31,
jens@0:     MYKeyValueObservingOptionDelayed = 1<<30
jens@0: };
jens@0: 
jens@0: 
jens@0: 
jens@0: @interface Observance : NSObject
jens@0: {
jens@0:     id _target;
jens@0:     id _observed;
jens@0:     NSString *_keyPath;
jens@0:     NSKeyValueObservingOptions _options;
jens@0:     SEL _action;
jens@0: }
jens@0: 
jens@0: - (id) initWithTarget: (id)target 
jens@0:                action: (SEL)action
jens@0:              observed: (id)observed
jens@0:               keyPath: (NSString*)keyPath 
jens@0:               options: (NSKeyValueObservingOptions)options;
jens@0: 
jens@0: - (void) stopObserving;
jens@0: 
jens@0: @property (readonly) id observed;
jens@0: @property (readonly) NSString* keyPath;
jens@0: 
jens@0: @end
jens@0: 
jens@0: 
jens@0: 
jens@0: @interface Observer : NSObject
jens@0: {
jens@0:     id _target;
jens@0:     NSMutableArray *_observances;
jens@0: }
jens@0: 
jens@0: - (id) initWithTarget: (id)target;
jens@0: 
jens@0: @property (readonly) id target;
jens@0: 
jens@0: - (void) observe: (id)observed 
jens@0:          keyPath: (NSString*)keyPath 
jens@0:          options: (NSKeyValueObservingOptions)options
jens@0:           action: (SEL)action;
jens@0: 
jens@0: - (void) observe: (id)observed 
jens@0:          keyPath: (NSString*)keyPath 
jens@0:           action: (SEL)action;
jens@0: 
jens@3: /** observed or keyPath may be nil, meaning wildcard */
jens@0: - (void) stopObserving: (id)observedOrNil keyPath: (NSString*)keyPathOrNil;
jens@3: - (void) stopObserving: (id)observed;
jens@0: - (void) stopObserving;
jens@0: 
jens@0: @end