model updates via binding thourh mpviewcontroller now get registered

MacPass/MPViewController.h

@@ -14,7 +14,26 @@
 
 - (void)didLoadView;
 - (NSResponder *)reconmendedFirstResponder;
-/* Returns the associated window controller */
 - (void)updateResponderChain;
 
+
+
+#pragma mark Binding Observation
+/**
+ *  Override this to get notificied when setValue:forKeyPath will be called with a keypath starting with representedObject.
+ *  This is always called via the binding system, hence it's usefull to anticipate model changes via the ui
+ *
+ *  The default implementation calls this just befor setValue:forKeyPath:
+ *
+ *  @param keyPath the full key path about to be affected
+ */
+- (void)willChangeValueForRepresentedObjectKeyPath:(NSString *)keyPath;
+/**
+ *  Override this to get notified when setValue:forKeyPath was called with a keypath starting with representedObject.
+ *  The default implementation calls this right after setValue:forKeyPath:
+ *
+ *  @param keyPath the full key path affected
+ */
+- (void)didChangeValueForRepresentedObjectKeyPath:(NSString *)keyPath;
+
 @end

MacPass/MPViewController.m

@@ -38,4 +38,24 @@
   }
 }
 
+#pragma mark Binding observation
+- (void)setValue:(id)value forKeyPath:(NSString *)keyPath {
+  if([keyPath hasPrefix:@"representedObject."]) {
+    [self didChangeValueForRepresentedObjectKeyPath:keyPath];
+    [super setValue:value forKeyPath:keyPath];
+    [self didChangeValueForRepresentedObjectKeyPath:keyPath];
+  }
+  else {
+    [super setValue:value forKeyPath:keyPath];
+  }
+}
+
+- (void)willChangeValueForRepresentedObjectKeyPath:(NSString *)keyPath {
+  NSLog(@"[%@ willChangeValueForRepresentedObjectKeyPath:%@]", NSStringFromClass([self class]), keyPath);
+}
+
+- (void)didChangeValueForRepresentedObjectKeyPath:(NSString *)keyPath {
+  NSLog(@"[%@ didChangeValueForRepresentedObjectKeyPath:%@]", NSStringFromClass([self class]), keyPath);
+}
+
 @end