Bug 192347 [acceptance]Theme cannot be deleted[01]
Description: [acceptance]Theme cannot be deleted Build number:2.2.0.v20070613 Steps to reproduce: 1. New a library. 2. New a theme and delete it. Expected result: Theme can be deleted Actual result: Delete key doesn't work and no delete item in context menu. Error log:n/a
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DNDUtil.java
}
		if ( source instanceof ColumnHandle )
		{
			try
			{
				int columnNumber = HandleAdapterFactory.getInstance( )
						.getColumnHandleAdapter( source )
						.getColumnNumber( );
				Object parent = ( (ColumnHandle) source ).getContainer( );
				if ( parent instanceof TableHandle )
				{
					return ( (TableHandle) parent ).copyColumn( columnNumber );
				}
				else if ( parent instanceof GridHandle )
				{
					return ( (GridHandle) parent ).copyColumn( columnNumber );
				}
			}
			catch ( SemanticException e )
			{
				e.printStackTrace( );
			}
			return null;
		}
		if ( source instanceof DesignElementHandle )
		{
			IDesignElement copyElement = ( (DesignElementHandle) source ).copy( );
			return copyElement;
		}
		if ( source instanceof IDesignElement )