import javafx.application.Application;
import static javafx.application.Application.launch;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.geometry.NodeOrientation;
import javafx.scene.Scene;
import javafx.scene.control.DatePicker;
import javafx.scene.control.ToggleButton;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class DatePickerWeekNumbers extends Application{

    private void init(Stage primaryStage) {
        VBox root = new VBox();
        root.setSpacing(20);
        Scene scene = new Scene(root, 400, 200);
        scene.setNodeOrientation(NodeOrientation.RIGHT_TO_LEFT);

        primaryStage.setScene(scene);
        DatePicker datePicker = new DatePicker();
        
        ToggleButton weekNumbersButton = new ToggleButton("Show Week Numbers");
        weekNumbersButton.selectedProperty().addListener(new ChangeListener<Boolean>() {
            public void changed(ObservableValue<? extends Boolean> ov, Boolean t, Boolean t1) {
                datePicker.setShowWeekNumbers(t1);
            }
        });

        root.getChildren().addAll(datePicker, weekNumbersButton);
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        init(primaryStage);
        primaryStage.setTitle("DatePicker Test " + System.getProperty("javafx.runtime.version"));
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}