final TextField textField = new TextField("Wartość");
textField.setRequired(true);
textField.setValue("100.99");
textField.addValidator(new DoubleValidator("Tylko wartości liczbowe"));
form.addField("value", textField);
window.addComponent(form);
Button button = new Button("Zapisz", form, "commit");
button.setIcon(new ThemeResource("../runo/icons/16/ok.png"));
button.addListener(new ClickListener() {
public void buttonClick(final ClickEvent event) {