Support NSValueBinding.

UKDockProgressIndicator.h

@@ -32,6 +32,9 @@
     on top of the app's icon in the dock. Use it just like an NSProgressIndicator.
     You can even have it call through to another progress indicator if desired. */
 
+/*  Supports NSValueBinding
+ */
+
 @interface UKDockProgressIndicator : NSObject
 {
     double                          max;

UKDockProgressIndicator.m

@@ -43,6 +43,13 @@ - (id) init
 	return self;
 }
 
+- (void)dealloc;
+{
+    [self unbind:NSValueBinding];
+
+    [super dealloc];
+}
+
 - (void) release
 {
 	[NSApp setApplicationIconImage: savedDockIcon];
@@ -158,4 +165,32 @@ -(void) updateDockTile
     [NSApp setApplicationIconImage: dockIcon];
 }
 
+#pragma mark Bindings
+
++ (void)initialize; { [self exposeBinding:NSValueBinding]; }
+
+- (id)valueForUndefinedKey:(NSString *)key;
+{
+    if ([key isEqualToString:NSValueBinding])
+    {
+        return [self valueForKey:@"doubleValue"];
+    }
+    else
+    {
+        return [super valueForUndefinedKey:key];
+    }
+}
+
+- (void)setValue:(id)value forUndefinedKey:(NSString *)key;
+{
+    if ([key isEqualToString:NSValueBinding])
+    {
+        return [self setValue:value forKey:@"doubleValue"];
+    }
+    else
+    {
+        return [super setValue:value forUndefinedKey:key];
+    }
+}
+
 @end