JavaFx ProgressIndicator while Loading Pane (GUI)

Question

In my application, I have to build big panes with a lot of content. I will show a ProgressIndicator while the GUI is loading.

My first test, I will show a ProgressIn

Answer 1

I have change the class like this:

public class SampleController implements Initializable {
@FXML
private BorderPane borderPane;
ProgressIndicator myProgressIndicator;
Task> myLongTask;
TabPane tabPane = new TabPane();

@Override
public void initialize(URL location, ResourceBundle resources)
{
        myLongTask = new Task>()
        {
            @Override
            protected List call() throws Exception
            {
            List newTabs = new ArrayList();
            final int count = 1000 - 1;
            for (int i = 1; i <= count; i++)
            {
                Tab newTab = new Tab("Number:" + i);
                newTabs.add(newTab);
            }
            return newTabs;
            }
        };

    myProgressIndicator = new ProgressIndicator();
    myProgressIndicator.progressProperty().bind(myLongTask.progressProperty());
    borderPane.setCenter(new Pane(myProgressIndicator));

    new Thread(myLongTask).start();

    myLongTask.setOnSucceeded(evt -> {
    final List result = myLongTask.getValue();
    final int step = 5;
    final int size = result.size();

    AnimationTimer timer = new AnimationTimer() {
        int index = 0;
        @Override
        public void handle(long now) {
        tabPane.getTabs().addAll(result.subList(index, Math.min(size, index+step)));
        index += step;
        if (index >= size) {
            this.stop();
        }
        }
    };
        timer.start();
        borderPane.setCenter(new Pane(tabPane));
    });
}

}

Is it this what you mean?