diff -r 000000000000 -r 3d3dcc3116d5 KVUtils.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/KVUtils.h	Wed Apr 02 14:45:33 2008 -0700
@@ -0,0 +1,66 @@
+//
+//  KVUtils.h
+//  MYUtilities
+//
+//  Created by Jens Alfke on 2/25/08.
+//  Copyright 2008 Jens Alfke. All rights reserved.
+//
+
+#import <Cocoa/Cocoa.h>
+
+
+enum {
+    MYKeyValueObservingOptionOnce = 1<<31,
+    MYKeyValueObservingOptionDelayed = 1<<30
+};
+
+
+
+@interface Observance : NSObject
+{
+    id _target;
+    id _observed;
+    NSString *_keyPath;
+    NSKeyValueObservingOptions _options;
+    SEL _action;
+}
+
+- (id) initWithTarget: (id)target 
+               action: (SEL)action
+             observed: (id)observed
+              keyPath: (NSString*)keyPath 
+              options: (NSKeyValueObservingOptions)options;
+
+- (void) stopObserving;
+
+@property (readonly) id observed;
+@property (readonly) NSString* keyPath;
+
+@end
+
+
+
+@interface Observer : NSObject
+{
+    id _target;
+    NSMutableArray *_observances;
+}
+
+- (id) initWithTarget: (id)target;
+
+@property (readonly) id target;
+
+- (void) observe: (id)observed 
+         keyPath: (NSString*)keyPath 
+         options: (NSKeyValueObservingOptions)options
+          action: (SEL)action;
+
+- (void) observe: (id)observed 
+         keyPath: (NSString*)keyPath 
+          action: (SEL)action;
+
+- (void) stopObserving: (id)observedOrNil keyPath: (NSString*)keyPathOrNil;
+
+- (void) stopObserving;
+
+@end