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

I think a much better and more natural approach is using Tab.setOnSelectionChanged. Here's a complete little program that implements that approach. You can see a MUCH more complete example here: http://sandsduchon.org/duchon/cs335/fx020.html

Note that you should also use Tab.isSelected to react correctly to selecting this tab or unselecting that this tab.

import javafx.application.Application; // FX base, requires start(Stage)
import javafx.stage.Stage;             // required by start (Stage)
import javafx.scene.Scene;             // no scene --> no display

import javafx.scene.control.TabPane;
import javafx.scene.control.Tab;

public class TabDemo extends Application {

   public void start (Stage stage) {
      TabPane tabPane = new TabPane ();

      Tab tba = new Tab ("one");
      Tab tbb = new Tab ("two");

      tabPane.getTabs().addAll (tba, tbb);

      tba.setOnSelectionChanged (e -> 
        System.out.println (
           tba.isSelected()?
           "a selected":
           "a unselected"
        )
      );

      Scene scene = new Scene (tabPane, 200, 50);
      stage.setScene (scene);
      stage.setTitle ("A Study of tab listeners");
      stage.show ();
   } // end start

} // end class TabDemo