Index: Core/Common/src/Core.Common.Gui/Forms/ViewManager/ViewList.cs
===================================================================
diff -u -ra805f816afeba48586bf812cd9869ad215b5d9c2 -r8f6918ebceb1e084bc543203ecf5bdf4cae2e925
--- Core/Common/src/Core.Common.Gui/Forms/ViewManager/ViewList.cs	(.../ViewList.cs)	(revision a805f816afeba48586bf812cd9869ad215b5d9c2)
+++ Core/Common/src/Core.Common.Gui/Forms/ViewManager/ViewList.cs	(.../ViewList.cs)	(revision 8f6918ebceb1e084bc543203ecf5bdf4cae2e925)
@@ -337,11 +337,6 @@
             }
 
             FireActiveViewChangedEvent(oldView);
-
-            if (Gui != null && Gui.Plugins != null)
-            {
-                Gui.Plugins.ForEach(p => p.OnActiveViewChanged(view));
-            }
         }
 
         /// <summary>
Index: Core/Common/src/Core.Common.Gui/GuiPlugin.cs
===================================================================
diff -u -ra805f816afeba48586bf812cd9869ad215b5d9c2 -r8f6918ebceb1e084bc543203ecf5bdf4cae2e925
--- Core/Common/src/Core.Common.Gui/GuiPlugin.cs	(.../GuiPlugin.cs)	(revision a805f816afeba48586bf812cd9869ad215b5d9c2)
+++ Core/Common/src/Core.Common.Gui/GuiPlugin.cs	(.../GuiPlugin.cs)	(revision 8f6918ebceb1e084bc543203ecf5bdf4cae2e925)
@@ -80,7 +80,5 @@
         {
             Gui = null;
         }
-
-        public virtual void OnActiveViewChanged(IView view) { }
     }
 }
\ No newline at end of file
Index: Core/Plugins/src/Core.Plugins.CommonTools.Gui/CommonToolsGuiPlugin.cs
===================================================================
diff -u -rfb6f952991193be2c30995f3f8e60312c12dc052 -r8f6918ebceb1e084bc543203ecf5bdf4cae2e925
--- Core/Plugins/src/Core.Plugins.CommonTools.Gui/CommonToolsGuiPlugin.cs	(.../CommonToolsGuiPlugin.cs)	(revision fb6f952991193be2c30995f3f8e60312c12dc052)
+++ Core/Plugins/src/Core.Plugins.CommonTools.Gui/CommonToolsGuiPlugin.cs	(.../CommonToolsGuiPlugin.cs)	(revision 8f6918ebceb1e084bc543203ecf5bdf4cae2e925)
@@ -121,12 +121,16 @@
 
             Gui.Application.ProjectClosing += ApplicationProjectClosing;
             Gui.Application.ProjectOpening += ApplicationProjectOpening;
+
             if (Gui != null && Gui.DocumentViews != null)
             {
                 if (Gui.DocumentViews.ActiveView != null)
                 {
-                    OnActiveViewChanged(Gui.DocumentViews.ActiveView);
+                    DocumentViewsActiveViewChanged();
                 }
+
+                Gui.DocumentViews.ActiveViewChanging += DocumentViewsActiveViewChanging;
+                Gui.DocumentViews.ActiveViewChanged += DocumentViewsActiveViewChanged;
                 Gui.DocumentViews.ChildViewChanged += DocumentViewsOnChildViewChanged;
                 Gui.DocumentViews.CollectionChanged += ViewsCollectionChanged;
             }
@@ -150,6 +154,13 @@
             {
                 if (Gui.DocumentViews != null)
                 {
+                    if (Gui.DocumentViews.ActiveView != null)
+                    {
+                        DocumentViewsActiveViewChanging();
+                    }
+
+                    Gui.DocumentViews.ActiveViewChanging -= DocumentViewsActiveViewChanging;
+                    Gui.DocumentViews.ActiveViewChanged -= DocumentViewsActiveViewChanged;
                     Gui.DocumentViews.ChildViewChanged -= DocumentViewsOnChildViewChanged;
                     Gui.DocumentViews.CollectionChanged -= ViewsCollectionChanged;
                 }
@@ -180,15 +191,30 @@
             base.Deactivate();
         }
 
-        public override void OnActiveViewChanged(IView view)
+        private void DocumentViewsActiveViewChanged(object sender, ActiveViewChangeEventArgs e)
         {
-            Unsubscribe();
+            DocumentViewsActiveViewChanged();
+        }
 
+        private void DocumentViewsActiveViewChanged()
+        {
             Subscribe();
 
             UpdateChartLegendView();
         }
 
+        private void DocumentViewsActiveViewChanging(object sender, ActiveViewChangeEventArgs e)
+        {
+            DocumentViewsActiveViewChanging();
+        }
+
+        private void DocumentViewsActiveViewChanging()
+        {
+            Unsubscribe();
+
+            UpdateChartLegendView();
+        }
+
         private void ViewsCollectionChanged(object sender, NotifyCollectionChangingEventArgs e)
         {
             if (Gui == null || Gui.DocumentViews == null)
@@ -247,7 +273,7 @@
 
         private void DocumentViewsOnChildViewChanged(object sender, NotifyCollectionChangingEventArgs notifyCollectionChangingEventArgs)
         {
-            OnActiveViewChanged(notifyCollectionChangingEventArgs.Item as IView);
+            DocumentViewsActiveViewChanged();
         }
 
         private void UpdateChartLegendView()