Using queries containing pseudo-classes in JavaFX

I am trying to use pseudo-classes in a programmatic query with help Node.lookupAll()

, however this seems to give unexpected results.

I've searched the web and can't find anything to suggest Node.lookupAll () doesn't support psuedo classes ...

public class Foo extends Application {

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

    @Override
    public void start(Stage primaryStage) throws Exception {
        PseudoClass pseudoClass = PseudoClass.getPseudoClass("custom");

        Label a = new Label();
        a.getStyleClass().add("foo");
        a.pseudoClassStateChanged(pseudoClass, false);

        Label b = new Label();
        b.getStyleClass().add("foo");
        b.pseudoClassStateChanged(pseudoClass, true);

        Label c = new Label();
        c.getStyleClass().add("foo");
        c.pseudoClassStateChanged(pseudoClass, true);


        HBox box = new HBox(a, b, c);
        primaryStage.setScene(new Scene(box));

        System.out.println(box.lookupAll(":custom").size()); // expected 2
        System.out.println(box.lookupAll(".foo:custom").size()); // expected 2
        System.out.println(box.lookupAll(".foo").size()); // expected 3, got 3
        System.out.println(box.lookupAll(":magichorse").size()); // expected 0 !!

    }

}

      

        
        
        
      

    

Output

4
3
3
4