bld_tfUrl.setMargins(new Margins(2, 20, 2, 2));
add(tfUrl, bld_tfUrl);
tfUrl.setFieldLabel("New TextField");
Button btnAdd = new Button("Add");
btnAdd.addSelectionListener(new SelectionListener<ButtonEvent>() {
public void componentSelected(ButtonEvent ce) {
addFeed(tfUrl.getValue());
}
});
BorderLayoutData bld_btnAdd = new BorderLayoutData(LayoutRegion.EAST, 50);