JavaFX：从节点获取控制器对象

Question

我正在使用JavaFX 2.2开发一个项目。 我有一个MainPanel，它是一个边框窗格。对于需要显示的每个新面板，它是否设置在mainPanel的中心，因为“标题”/顶部始终保持不变。

示例：

public class MainPanelController extends BorderPane {

private StartPanelController StartPanel;

public MainPanelController () {
    FXMLLoader loader = new FXMLLoader(getClass().getResource("MainPanel.fxml"));
    loader.setRoot(this);
    loader.setController(this);
    try {
        loader.load();
    } catch (IOException ex) {
        throw new RuntimeException(ex);
    }
    buildGUI();
}

private void buildGUI() {
    StartPanel = new StartPanelController(this);
    this.setCenter(StartPanel); //this is the very first screen that is shown within the mainpanel.

private void HeaderItemOnAction(ActionEvent event) {
Node currentCenterPanel = this.getCenter(); 
//From this node that is currently in the center i would like to know the current controller object.
}
}

这是可能的，还是每次初始化新面板时都必须添加包含所有引用的列表？