--- a/Framework/Radiography/RadiographyLayer.cpp	Mon Feb 25 17:57:37 2019 +0100
+++ b/Framework/Radiography/RadiographyLayer.cpp	Tue Feb 26 12:58:03 2019 +0100
@@ -117,12 +117,14 @@
   }
 
 
-  RadiographyLayer::RadiographyLayer() :
+  RadiographyLayer::RadiographyLayer(MessageBroker& broker, const RadiographyScene& scene) :
+    IObservable(broker),
     index_(0),
     hasSize_(false),
     width_(0),
     height_(0),
-    prefferedPhotometricDisplayMode_(PhotometricDisplayMode_Default)
+    prefferedPhotometricDisplayMode_(PhotometricDisplayMode_Default),
+    scene_(scene)
   {
     UpdateTransform();
   }
@@ -133,6 +135,13 @@
     UpdateTransform();
   }
 
+  void RadiographyLayer::SetPreferredPhotomotricDisplayMode(PhotometricDisplayMode  prefferedPhotometricDisplayMode)
+  {
+    prefferedPhotometricDisplayMode_ = prefferedPhotometricDisplayMode;
+
+    EmitMessage(RadiographyLayer::LayerEditedMessage(*this));
+  }
+
   void RadiographyLayer::SetCrop(unsigned int x,
                                  unsigned int y,
                                  unsigned int width,
@@ -151,6 +160,8 @@
 
     geometry_.SetCrop(x, y, width, height);
     UpdateTransform();
+
+    EmitMessage(RadiographyLayer::LayerEditedMessage(*this));
   }
 
   void RadiographyLayer::SetGeometry(const Geometry& geometry)
@@ -161,6 +172,8 @@
     {
       UpdateTransform();
     }
+
+    EmitMessage(RadiographyLayer::LayerEditedMessage(*this));
   }
 
 
@@ -187,6 +200,8 @@
   {
     geometry_.SetAngle(angle);
     UpdateTransform();
+
+    EmitMessage(RadiographyLayer::LayerEditedMessage(*this));
   }
 
 
@@ -205,6 +220,7 @@
     height_ = height;
 
     UpdateTransform();
+    EmitMessage(RadiographyLayer::LayerEditedMessage(*this));
   }
 
 
@@ -282,6 +298,7 @@
   {
     geometry_.SetPan(x, y);
     UpdateTransform();
+    EmitMessage(RadiographyLayer::LayerEditedMessage(*this));
   }
 
 
@@ -290,6 +307,7 @@
   {
     geometry_.SetPixelSpacing(x, y);
     UpdateTransform();
+    EmitMessage(RadiographyLayer::LayerEditedMessage(*this));
   }