WidgetGalleryController.java 文件源码

@FXML
private void initialize() throws IOException {
  root.getChildren().addListener((ListChangeListener<? super Node>) change -> {
    while (change.next()) {
      for (Node node : change.getAddedSubList()) {
        if (node instanceof WidgetGallery.WidgetGalleryItem) {
          WidgetGallery.WidgetGalleryItem galleryItem = (WidgetGallery.WidgetGalleryItem) node;
          galleryItem.setOnDragDetected(event -> {
            Dragboard dragboard = galleryItem.startDragAndDrop(TransferMode.COPY);

            // TODO type safety
            ClipboardContent clipboard = new ClipboardContent();
            clipboard.put(DataFormats.widgetType, galleryItem.getWidget().getName());
            dragboard.setContent(clipboard);
            event.consume();
          });
        }
      }
    }
  });
}