I created a ProgressIndicator with setProgress(-1) and add it to a StackPane. If I do "setVisibility(false)" before showing the stage and do "setVisible(true)" after showing the stage, the ProgressIndicator is showing but not animating.

It works only if I do "setVisible(false)" AFTER showing the stage.

Here my test code:

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ProgressIndicator;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class TestProgressIndicator extends Application
{

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

    @Override
    public void start(Stage primaryStage)
    {
        final ProgressIndicator pi = new ProgressIndicator();

        Button b = new Button("Show ProgressIndicator");
        b.setOnAction(new EventHandler<ActionEvent>()
        {
            @Override
            public void handle(ActionEvent actionEvent)
            {
                pi.setVisible(true);
            }
        });

        StackPane mp = new StackPane();
        mp.getChildren().addAll(pi, b);

        Scene scene = new Scene(mp, 320, 480);

        primaryStage.setScene(scene);

        pi.setVisible(false); //doesn't work
        primaryStage.show();
        //pi.setVisible(false); //works
    }
}