Disable ValueChangeListener - vaadin

Question

I'm new of vaadin and now I'm running in the following trouble. I have a TabSheet that contains a few tabs.
Now my Tax Code component setted in immediate mode and others it has a the following ValueChangeLister
TextField taxCode = new TextField();
taxCode.setImmediate(true);
taxCode.addValueChangeListener(new ValueChangeListener() {
#Override
public void valueChange(ValueChangeEvent event) {
if(taxCode.isModified()){
searchByTaxCode(taxCode.getValue());
}
}
});
then each time that the user changes the value to taxCode component, the method searchByTaxCode is invoked. This happens also when the user switch from Tab2 to Tab1 and I don't want this?
How can I fix this problem?

Answer 1

This simple test app does not fire the ValueChangeEvent when switching tabs, only when actually changing the value in the TextField. You have something more that could influence the behaviour?
public class TabSheetEventsUI extends UI {
#WebServlet(value = "/tabsheetevents/*", asyncSupported = true)
#VaadinServletConfiguration(productionMode = false, ui = TabSheetEventsUI.class)
public static class Servlet extends VaadinServlet {
}
#Override
protected void init(VaadinRequest request) {
TabSheet tabSheet = new TabSheet();
Panel tab1 = new Panel("Tab 1");
Panel tab2 = new Panel("Tab 2");
tabSheet.addTab(tab1);
tabSheet.addTab(tab2);
final TextField tab1tf = new TextField("tab1tf");
tab1tf.setImmediate(true);
tab1tf.addValueChangeListener(new ValueChangeListener() {
#Override
public void valueChange(ValueChangeEvent event) {
System.out.println("Value change event catched.");
}
});
tab1.setContent(tab1tf);
setContent(tabSheet);
}
}