discountText = new Text(parcelComposite, SWT.BORDER);
Validator.validateNumbers(discountText);
Validator.validateTextOfMoneyValuesToAvoidEmptyStrings(discountText);
discountText.setText("0,00");
new MoneyMask(discountText);
discountText.setLayoutData(dataText);
discountText.addListener(SWT.KeyUp, new Listener() {
public void handleEvent(Event arg0) {
setMessage("", IMessageProvider.NONE);