addButton.setLayoutData(data1);
addButton.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
IStateTransition trans = new StateTransition();
trans.createNew(parentElement,
webflowState);
StateTransitionPropertiesDialog dialog = new StateTransitionPropertiesDialog(
parentShell, parentElement, trans, true);
if (dialog.open() == Dialog.OK) {
transitions.add(trans);