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

In addition to MJafar Mash answer above, you can use "selectedIndexProperty()" to get the index of the selected tab instead of "selectedItemProperty()" which gets the selected tab itself.

chatTabs.getSelectionModel().selectedIndexProperty().addListener(new ChangeListener (){
     @Override
     public void changed(ObservableValue observable, Number oldValue, Number newValue) {
           int selectedIndex = newValue.intValue();
           //where index of the first tab is 0, while that of the second tab is 1 and so on.
     }
 });

And this is the lambda expression version of it

chartTabs.getSelectionModel().selectedIndexProperty().addListener( (observable, oldValue, newValue) -> {
       int selectedIndex = newValue.intValue();
       //where index of the first tab is 0, while that of the second tab is 1 and so on.
});