I am having problems with Accordion sizing. I took the code below from RT-14168, and changed the manual sizing of the stage in that bug, to a sizeToScene() call. When you do this the Accordion doesn't show correctly. I am having other problems with Accordions inside SplitPanes, but hopefully a fix to the problem below will fix those too.

import javafx.application.Application;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Accordion;
import javafx.scene.control.Label;
import javafx.scene.control.TitledPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

public class Main1 extends Application
{

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

  private Parent getContent()
  {
    VBox list = new VBox(10);

    TitledPane pane1 = new TitledPane();
    pane1.setTitle(new Label("title 1\nLong text long text"));
    pane1.setContent(new Rectangle(100, 40, Color.SKYBLUE));
    TitledPane pane2 = new TitledPane();
    pane2.setTitle(new Label("title 2\nLong text long text"));
    pane2.setContent(new Rectangle(100, 40, Color.BLUEVIOLET));
    Accordion acc = new Accordion();
    acc.getPanes().addAll(pane1, pane2);
    acc.setExpandedPane(pane2);
    list.getChildren().add(acc);
    return list;
  }

  public void start(Stage stage)
  {
    stage.setX(100);
    stage.setY(100);
    Scene scene = new Scene(getContent());
    stage.setScene(scene);
    stage.sizeToScene();
    stage.setVisible(true);
  }
}