ControlDecoration decoration = new ControlDecoration(label, SWT.RIGHT | SWT.TOP );
filterViewer = new FilterViewer(parent, SWT.MULTI );
filterViewer.getControl().setLayoutData("cell 1 1,grow,width 200:100%:100%,height 60:100%:100%");
FilterInput input = new FilterInput();
input.setFeedback( decoration );
filterViewer.setInput(input);
filterViewer.refresh();
listen(true);
}