The method nsIView::CreateView has parameter that indicates whether D&D for the widget

should be turned on or not. This make it configurable from the outside,
it is needed for the editor

view/public/nsIView.h

@@ -395,7 +395,8 @@ public:
    */
   NS_IMETHOD CreateWidget(const nsIID &aWindowIID,
                           nsWidgetInitData *aWidgetInitData = nsnull,
-        					        nsNativeWidget aNative = nsnull) = 0;
+        					        nsNativeWidget aNative = nsnull,
+                          PRBool aEnableDragDrop = PR_TRUE) = 0;
 
   /**
    * Set the widget associated with this view.

view/src/nsView.cpp

@@ -1209,7 +1209,8 @@ NS_IMETHODIMP nsView :: GetClientData(void *&aData) const
 
 NS_IMETHODIMP nsView :: CreateWidget(const nsIID &aWindowIID,
                                      nsWidgetInitData *aWidgetInitData,
-                                     nsNativeWidget aNative)
+                                     nsNativeWidget aNative,
+                                     PRBool aEnableDragDrop)
 {
   nsIDeviceContext  *dx;
   nsRect            trect = mBounds;
@@ -1239,6 +1240,9 @@ NS_IMETHODIMP nsView :: CreateWidget(const nsIID &aWindowIID,
         mWindow->Create(parent, trect, ::HandleEvent, dx, nsnull, nsnull, aWidgetInitData);
         NS_IF_RELEASE(parent);
       }
+      if (aEnableDragDrop) {
+        mWindow->EnableDragDrop(PR_TRUE);
+      }
     }
   }
 

view/src/nsView.h

@@ -89,7 +89,8 @@ public:
   NS_IMETHOD  SetDirtyRegion(nsIRegion* aRegion);
   NS_IMETHOD  CreateWidget(const nsIID &aWindowIID,
                            nsWidgetInitData *aWidgetInitData = nsnull,
-                           nsNativeWidget aNative = nsnull);
+                           nsNativeWidget aNative = nsnull,
+                           PRBool aEnableDragDrop = PR_TRUE);
   NS_IMETHOD  SetWidget(nsIWidget *aWidget);
   NS_IMETHOD  GetWidget(nsIWidget *&aWidget) const;
   virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const;