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问题描述

我想从我加载FXMLoader的场景中获取控制器。用例是:

I want to get the controller from a scene that i've loaded with FXMLoader. The use case is:


  1. 我的JSON管理器收到一个JSON对象

  2. 任务我推出了一个新的场景,使用

  1. My JSON manager receives a JSON object
  2. The task I've launched shows a new Scene using

Parent p = FXMLLoader.load(getClass().getResource("foo.fxml"));
Scene scene = new Scene(p);
stage.setScene(scene);

之后,我有空场景。

现在我这样做来填充组件

Now I do this to fill the components

AnchorPane pane = (AnchorPane)((AnchorPane) scene.getRoot()).getChildren().get(0);
for(Node node : pane.getChildren()){
    String id = node.getId();
    if(id.equals(NAME)){
         ((TextField)node).setText(value);
    }
}


我的问题是,有更简单的方法吗?我在FXML中指定了一个控制器

My question, is there an easier way to do this? I have a controller specified in FXML

<AnchorPane id="AnchorPane" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="526.0" minWidth="356.0" prefHeight="526.0" prefWidth="356.0"
xmlns:fx="http://javafx.com/fxml" fx:controller="bar.foo">

我想用绑定值获取实例(在这种情况下,TextField名为name)

I want to get the instance with the bind values (TextField called name in this case)

提前致谢

推荐答案

1)你可以从 FXMLLoader 但不知道是否可以从场景

1) You can get the controller from the FXMLLoader but don't know is it possible from Scene :

FXMLLoader fxmlLoader = new FXMLLoader();
Pane p = fxmlLoader.load(getClass().getResource("foo.fxml").openStream());
bar.foo fooController = (bar.foo) fxmlLoader.getController();

稍后使用 fooController 部分代码,您可以使用 Node#setUserData()。例如,在上面的代码之后:

To use the fooController later in a different part of your code, you can use Node#setUserData(). For example after the code above:

p.setUserData(fooController);
...
// after a while of app logic and code
bar.foo controller_of_p = (bar.foo) p.getUserData();

这提供了一种解决方法和实现目标的快捷方式。

This gives a workaround and a shortcut to achieve your goal.

2)如果你的节点有一个id,你可以直接 Node#lookup()而不是构造一个for循环:

2) If your node has an id then you can directly Node#lookup() it rather than constructing a for-loop :

TextField txt = (TextField) pane.lookup("#nodeId");

这篇关于JavaFX 2.0 + FXML。从其他任务更新场景值的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

07-29 12:49
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