Flyout.java 文件源码

/**
    * Constructs a new {@code Flyout} using the specified "anchor"
    * as the location from which the specified "contents" will 
    * fly out.
    * 
    * @param anchor        Node used to define the start point of the flyout animation
    * @param contents      Node containing the "control" to fly out
    */
   @SuppressWarnings("restriction")
public Flyout(Node anchor, Node contents, MainScene mainScene) {
    this.mainScene = mainScene;
    this.anchor = anchor;
       this.flyoutContents = contents;
       userNodeContainer = new Pane();

       getChildren().addListener((Change<? extends Node> c) -> {
           if(getChildren().size() > 1) {
               throw new IllegalStateException("May only add one child to a Flyout");
           }
       });

       layoutBoundsProperty().addListener((v, o, n) -> {
           if(getChildren().size() < 1) return;

           if(getChildren().size() > 1) {
               throw new IllegalStateException("May only add one child to a Flyout");
           }
       });

       getChildren().add(anchor);

       popup = new Stage();
       popup.setResizable(true);

   }