从 JavaFX 中的另一个控制器访问字段 [英] Access fields from another Controller in JavaFX

问题描述

我正在使用 JavaFX 编写小型应用程序，但我遇到了一个问题.

I'm writing small application using JavaFX but I stuck with one problem.

我有 fxml 文件:

I have fxml files:

MainPane.fxml
Stream.fxml
Play.fxml

他们每个人都有自己的控制器:

and each of them has its own controller:

MainPaneController.java
StreamController.java
PlayController.java

MainPane 中的位置:

Where in MainPane is:

<GridPane fx:controller="model.MainController" fx:id="mainGrid"
    xmlns:fx="http://javafx.com/fxml" alignment="CENTER" gridLinesVisible="true">

    <children>
        <fx:include source="Stream.fxml"/>
    </children>

    <children>
        <fx:include source="Play.fxml"/>
    </children>
</GridPane>

Play.fxml 有这个字段:

Play.fxml has this field:

<TextField fx:id="searchField" text="Search" onAction="#search"/>

现在，如果触发操作(输入按钮)，我想访问和更改 Stream.fxml 中的标签，如下所示:

now when action (enter button) if fired I want to access and change a label in Stream.fxml as follows:

public class PlayController implements Initializable {

    @FXML
    private TextField searchField;

    @FXML
    protected void search() {
        System.out.println("Search");
        String text = searchField.getText();
        //how to access Label in StreamController
    }
}

我想避免绑定

MainPaneController <-> StreamController
MainController <-> PlayController

和访问字段，如:

mainController.getStreamController.changeLabel(text)

因为我希望有更好的方法来做到这一点.

because I hope there is some better way to do this.

推荐答案

在嵌套"控制器 StreamController 和 PlayController 中公开属性.这些控制器可以根据需要将属性绑定到他们定义的 UI 组件.

Expose properties in the "nested" controllers StreamController and PlayController. Those controllers can bind the properties to the UI components they define as needed.

然后按照FXML 简介的嵌套控制器部分.

更新:这是一个更相似的示例，其中交互控制器都包含在一个公共FXML.

Update: Here's a more similar example, where the interacting controllers are both included in a common FXML.

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