在 javafx 中从另一个 window 设置 TextField 的值

Set value of TextField from another window in javafx

我在 Action(按回车键)上设置了一个 TextField 以打开另一个显示 table 选项(数百个选项)的 fxml window。基本上我需要第二个 window 在第一个 window.

上设置文本字段的文本
@FXML //this pops out a 2nd window where i can choose a person. Set from Scene Builder
private void pickperson(ActionEvent event) throws IOException {
    Parent parent = FXMLLoader.load(getClass().getResource("/fxml/personpicker.fxml"));
    Scene scene = new Scene(parent);
    Stage stage = new Stage();
    stage.setScene(scene);
    stage.centerOnScreen();
    stage.show();
} 

@FXML //when i click "use selected" this gets executed
private void use(ActionEvent event) {
    Person person0 = table.getSelectionModel().getSelectedItem();
    int id = person0.getId();
    String name = person0.getNAME();
    final Clipboard clipboard = Clipboard.getSystemClipboard();
    final ClipboardContent content = new ClipboardContent();
    content.putString(Integer.toString(id)); //i tried clipboard but when i paste, nothing is pasted
    Stage stage = (Stage) useselected.getScene().getWindow();//closes the window
    stage.close();
}

我在 2 号 window 有一个 table,按钮标记为:"use selected"。我想让它在单击 "use selected" 时关闭 window,同时从选择中设置文本字段。

编辑: 我通过添加

让剪贴板工作
Clipboard.getSystemClipboard().setContent(content);

现在,我只需要在 window 关闭后直接粘贴值即可;就像按下 CRTL+V 一样。

根据您的代码,"parent" Stage,即包含 TextField 的代码是显示三个按钮的 Stage 的所有者。因此,您只需调用子 Stage 中的方法 getOwner() 即可访问父 Stage。一旦您获得对父级 Stage 的引用,您就可以访问其节点并对其进行操作。

我只更改了你代码中的两个文件。

  1. Parent.fxml - 我将 id 属性添加到 TextField.
<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>

<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="266.0" prefWidth="394.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="test.ParentController">
   <children>
      <TextField id="txtFld" layoutX="123.0" layoutY="121.0" onAction="#picker" />
      <Label layoutX="140.0" layoutY="86.0" text="Press enter to choose" />
   </children>
</AnchorPane>
  1. ChildController.java - 我添加了方法 handleEvent(int)
package test;

import java.net.URL;
import java.util.ResourceBundle;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;

public class ChildController implements Initializable {
    @FXML
    AnchorPane ap;
    @FXML
    private Button btnone;
    @FXML
    private Button btntwo;
    @FXML
    private Button btnthree;

    @Override
    public void initialize(URL url, ResourceBundle rb) {
        // TODO
    }

    @FXML
    private void one(ActionEvent event) {
        handleEvent(1);
    }

    @FXML
    private void two(ActionEvent event) {
        handleEvent(2);
    }

    @FXML
    private void three(ActionEvent event) {
        handleEvent(3);
    }

    private void handleEvent(int chosenNumber) {
        Stage stage = (Stage) ap.getScene().getWindow();
        Stage owner = (Stage) stage.getOwner();
        Scene scene = owner.getScene();
        Parent root = scene.getRoot();
        TextField txtFld = (TextField) root.lookup("#txtFld");
        txtFld.setText(String.valueOf(chosenNumber));
        stage.close();
    }
}