edited DND

org.fortiss.tooling.base/trunk/src/org/fortiss/tooling/base/editor/TreeViewerEditorBase.java

@@ -155,6 +155,7 @@ public abstract class TreeViewerEditorBase<T extends EObject> extends
 		@Override
 		public void dragEnter(DropTargetEvent event) {
 			event.detail = DND.DROP_COPY;
+			// event.data = LocalSelectionTransfer.getTransfer().getSelection();
 			super.dragEnter(event);
 		}
 
@@ -166,6 +167,17 @@ public abstract class TreeViewerEditorBase<T extends EObject> extends
 				target = treeViewer.getInput();
 			}
 			lastTarget = target;
+
+			if (lastTarget instanceof EObject) {
+
+				EObject dropped = DragAndDropUtils
+						.extractDroppedEObject(LocalSelectionTransfer
+								.getTransfer().getSelection());
+
+				return ICompositorService.INSTANCE.canCompose(
+						(EObject) lastTarget, dropped, null);
+			}
+
 			return true;
 		}