从javafx中的另一个窗口设置TextField的值

时间:2019-10-05 12:31:11

标签: java mysql javafx fxml scenebuilder

我在Action(按Enter)上设置了TextField,以打开另一个fxml窗口,该窗口显示一个选择表(数百个选择)。基本上,我需要第二个窗口在第一个窗口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();
}

我在第二个窗口中有一个表,上面有一个标记为“使用所选内容”的按钮。我要这样做,以便在单击“使用选定的内容”时关闭窗口,并同时从选择中设置文本字段。

编辑: 通过添加

使剪贴板起作用
Clipboard.getSystemClipboard().setContent(content);

现在,我只需要在窗口关闭后直接粘贴值即可;就像按下CRTL + V一样。

1 个答案:

答案 0 :(得分:0)

根据您的代码,{parent} Stage(即包含TextField的那个)是显示三个按钮的Stage的所有者。因此,您可以简单地在子级Stage中调用方法getOwner()来访问父级Stage。引用父级Stage后,就可以访问其节点并对其进行操作。

我只更改了您代码中的两个文件。

  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();
    }
}