JavaFX TabPane: How to listen to selection changes

Question

I want to do some actions when user goes from one tab to another, since i made my form design with Scene Builder I cannot use code mentioned here (He used TabPaneBuild

Answer 1

The right way to use change listener is this:

chatTabs.getSelectionModel().selectedItemProperty().addListener(
    new ChangeListener() {
        @Override
        public void changed(ObservableValue ov, Tab t, Tab t1) {
            System.out.println("Tab Selection changed");
        }
    }
);

Why code in question didn't work? I guess its because your change listener listens to changes in "selectionModel" instead of "selectedItem"

---

Finding out when a tab has been added or removed is a little trickier:

tabs.addListener( (Change change) -> {
  while( change.next() ) {
    if( change.wasAdded() ) {
      for( final Tab tab : change.getAddedSubList() ) {
        System.out.println( "Tab Added: " + tab );
      }
    } else if( change.wasRemoved() ) {
      // ...
    }
  }
} );