java JavaFX 2.0 + FXML。从不同的任务更新场景值
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JavaFX 2.0 + FXML. Updating scene values from a different Task
提问by Javier
I want to get the controller from a scene that i've loaded with FXMLoader. The use case is:
我想从我用 FXMLoader 加载的场景中获取控制器。用例是：
- My JSON manager receives a JSON object
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);After that, i have the empty scene.
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 JSON 管理器收到一个 JSON 对象
我启动的任务显示了一个新场景，使用
Parent p = FXMLLoader.load(getClass().getResource("foo.fxml")); Scene scene = new Scene(p); stage.setScene(scene);在那之后，我有空的场景。
现在我这样做是为了填充组件
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); } }
My question, is there an easier way to do this? I have a controller specified in FXML
我的问题是，有没有更简单的方法来做到这一点？我有一个在 FXML 中指定的控制器
<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">
I want to get the instance with the bind values (TextField called name in this case)
我想获取具有绑定值的实例（在本例中名为 name 的 TextField）
Thanks in advance
提前致谢
回答by Uluk Biy
1) You can get the controller from the FXMLLoaderbut don't know is it possible from Scene:
1）您可以从以下位置获取控制器，FXMLLoader但不知道是否可以从Scene：
FXMLLoader fxmlLoader = new FXMLLoader();
Pane p = fxmlLoader.load(getClass().getResource("foo.fxml").openStream());
bar.foo fooController = (bar.foo) fxmlLoader.getController();
To use the fooControllerlater in a different part of your code, you can use Node#setUserData(). For example after the code above:
要fooController在代码的不同部分使用后者，您可以使用Node#setUserData(). 例如在上面的代码之后：
p.setUserData(fooController);
...
// after a while of app logic and code
bar.foo controller_of_p = (bar.foo) p.getUserData();
This gives a workaround and a shortcut to achieve your goal.
这提供了解决方法和实现目标的捷径。
2) If your node has an id then you can directly Node#lookup()it rather than constructing a for-loop :
2）如果你的节点有一个id，那么你可以直接使用Node#lookup()它而不是构建一个for循环：
TextField txt = (TextField) pane.lookup("#nodeId");
