Bug 183888 BIRT designer - Cube in data explorer
Current behavior - The data explorer view allows uer to change the order of a group level in a hierrachy. Expected behavior - user should not be allowed to change the order of the group level in data explorer view. - Instead user can user cube builder dialog to change the order.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DNDUtil.java
&& ( (ColumnHandle) selection ).getRoot( ) != null )
		{
			int columnNumber = HandleAdapterFactory.getInstance( )
					.getColumnHandleAdapter( selection )
					.getColumnNumber( );
			Object parent = ( (ColumnHandle) selection ).getContainer( );
			if ( parent instanceof TableHandle )
			{
				return ( (TableHandle) parent ).canCopyColumn( columnNumber );
			}
			else if ( parent instanceof GridHandle )
			{
				return ( (GridHandle) parent ).canCopyColumn( columnNumber );
			}
		}
		return selection instanceof ReportItemHandle
				|| selection instanceof DataSetHandle
				|| selection instanceof DataSourceHandle
				|| selection instanceof ScalarParameterHandle
				|| selection instanceof ParameterGroupHandle
				
				|| selection instanceof GroupHandle
				|| selection instanceof StyleHandle
				|| selection instanceof ThemeHandle
				|| selection instanceof EmbeddedImageHandle
				|| selection instanceof TemplateElementHandle
				|| selection instanceof DataSetItemModel
				|| selection instanceof ResultSetColumnHandle
				|| selection instanceof CubeHandle;