Question

我有两个javaFx窗口。第一个有T/N和ComboBox打开第二个模态窗口。

在第二个窗口中有Button和TextField Button，可将textField值添加到Control窗口MainController。我不知道该怎么做。有一个解释的例子对我很有帮助。以下是课程：

Main.java

ComboBox

Contrller.java

package sample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
        primaryStage.setTitle("Hello World");
        primaryStage.setScene(new Scene(root, 300, 275));
        primaryStage.show();
    }


    public static void main(String[] args) {
        launch(args);
    }
}

主窗口的FXML：

package sample;

import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.control.TextField;
import javafx.stage.Modality;
import javafx.stage.Stage;

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

public class Controller implements Initializable{
    @FXML
    public ComboBox<String> combo;
    @FXML
    Button button;
    public ObservableList<String> list = FXCollections.observableArrayList("A");
    @Override
    public void initialize(URL location, ResourceBundle resources) {
        setCombo();

    }

    public void setCombo(){
        combo.setItems(list);
    }

    public void openModal() throws IOException {
        Stage primaryStage = new Stage();
        Parent root = FXMLLoader.load(getClass().getResource("sec.fxml"));
        primaryStage.setTitle("Send Mail");
        primaryStage.setScene(new Scene(root,800,600));
        primaryStage.initModality(Modality.WINDOW_MODAL);
        //primaryStage.initOwner((Stage) menuBar.getScene().getWindow());
        primaryStage.show();
    }
}

现在第二个窗口Sec.Java

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.ComboBox?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.StackPane?>
<?import javafx.scene.layout.VBox?>

<VBox alignment="CENTER" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.65" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Controller">
    <children>
        <StackPane prefHeight="67.0" prefWidth="600.0">
            <children>
                <Label text="Get value from Another Child Dialog" />
            </children>
        </StackPane>
        <HBox prefHeight="100.0" prefWidth="200.0">
            <children>
                <Label text="Add Value of TextBox:" />
                <ComboBox fx:id="combo" prefWidth="150.0" />
            </children>
        </HBox>
        <Button fx:id="button" mnemonicParsing="false" onAction="#openModal" text="Open Dialog" />
    </children>
</VBox>

第二个窗口FXML：

package sample;

import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;

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

/**
* Created by tracedot on 12/11/16.
*/
public class Sec implements Initializable{
    @FXML
    Button button;
    @FXML
    TextField textfield;
    public Controller controller=new Controller();

    public void setToCombo(){
        String cbvalue= textfield.getText();
        controller.combo.getItems().add(cbvalue);
        //controller.combo.itemsProperty().setValue(new ArrayList<String>().add());
    }

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        //setToCombo();

    }
}

Answer 1

创建一个也用于主fxml的Controller类的新实例，可以帮助您与显示的fxml一起使用的实例进行通信。您必须将现有控制器传递给与第二个fxml使用的Sec实例：

public class Sec implements Initializable{

    ...

    private Controller controller;

    public void setController(Controller controller ) {
        this.controller = controller;
    }

    ...

}

public void openModal() throws IOException {
    Stage primaryStage = new Stage();
    FXMLLoader loader = new FXMLLoader(getClass().getResource("sec.fxml"));
    Parent root = loader.load();
    primaryStage.setTitle("Send Mail");
    primaryStage.setScene(new Scene(root,800,600));
    primaryStage.initModality(Modality.WINDOW_MODAL);
    //primaryStage.initOwner((Stage) menuBar.getScene().getWindow());

    loader.<Sec>getController().setController(this);
    primaryStage.show();
}

如果您想在输入后关闭新窗口，还可以使用showAndWait()显示新阶段：

public class Sec implements Initializable{

    ...
    private String result = null;

    public String getResult() {
        return result;
    }

    public void setCombo() {
        result = textfield.getText();
        textField.getScene().getWindow().hide();
    }

    ...

}

public void openModal() throws IOException {
    Stage primaryStage = new Stage();
    FXMLLoader loader = new FXMLLoader(getClass().getResource("sec.fxml"));
    Parent root = loader.load();
    primaryStage.setTitle("Send Mail");
    primaryStage.setScene(new Scene(root,800,600));
    primaryStage.initModality(Modality.WINDOW_MODAL);
    //primaryStage.initOwner((Stage) menuBar.getScene().getWindow());

    primaryStage.showAndWait();

    String result = loader.<Sec>getController().getResult();

    if (result != null) {
        // if a result was selected, add it to the list
        list.add(result);
    }
}

请注意，使用此方法，如果要重复使用第二个场景，还应添加一些功能以重置result字段。

从另一个窗口TextField Control获取ComboBox值

1 个答案: