From f01480c2bdb8e966d7ec36913f7e08dc5b69a739 Mon Sep 17 00:00:00 2001
From: michael starke <michael.starke@hicknhack-software.com>
Date: Wed, 24 Aug 2016 16:25:06 +0200
Subject: [PATCH] model updates via binding thourh mpviewcontroller now get
 registered

---
 MacPass/MPViewController.h | 21 ++++++++++++++++++++-
 MacPass/MPViewController.m | 20 ++++++++++++++++++++
 2 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/MacPass/MPViewController.h b/MacPass/MPViewController.h
index a68c40ab..649d37d8 100644
--- a/MacPass/MPViewController.h
+++ b/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
diff --git a/MacPass/MPViewController.m b/MacPass/MPViewController.m
index 536517b0..71b21c86 100644
--- a/MacPass/MPViewController.m
+++ b/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