两个JavaFx控制器之间的通信

Question

我做了一个控制器和视图（fxml）的结构来尽可能地分离我的代码，我想知道如何在两个控制器之间进行通信。我的意思是，一个控制器必须调用另一个控制器的一些函数来设置它是最新的。

我认为我当前结构的一个图式会更明确：

package pappu.controllers;

import pappu.core.controller.AbstractController;

public class FolderController extends AbstractController
{

}

<?import java.lang.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<VBox fx:id="view" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2" fx:controller="pappu.controllers.FolderController">
  <TabPane>
    <tabs>
      <Tab text="RECHERCHE">
        <content>
          <AnchorPane id="Content">
            <children>
                <fx:include source="FolderList.fxml" />  
            </children>
          </AnchorPane>
        </content>
      </Tab>
      <Tab text="DOSSIER">
        <content>
          <AnchorPane id="Content">
            <children>
                <fx:include source="FolderFormAdd.fxml" />  
            </children>
          </AnchorPane>
        </content>
      </Tab>
    </tabs>
  </TabPane>
</VBox>

package pappu.controllers;

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

import org.hibernate.Session;

import javafx.beans.property.SimpleStringProperty;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableColumn.CellDataFeatures;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.util.Callback;
import pappu.core.controller.AbstractController;
import pappu.entities.Folder;

public class FolderListController extends AbstractController implements Initializable
{
    /**
     * TableView object
     */
    @FXML private TableView<Folder> foldersTableView;

    /**
     * FolderNumber column object
     */
    @FXML private TableColumn<Folder, String> colFolderNumber;

    /**
     * Person column object
     */
    @FXML private TableColumn<Folder, String> colPerson;

    /**
     * Birthday date column object
     */
    @FXML private TableColumn<Folder, Date> colBirthdayDate;

    /**
     * List of folders
     */
    private static List<Folder> foldersList;

    /**
     * Constructor
     * Will make a call to initializeFoldersList()
     */
    public FolderListController()
    {
        initializeFoldersList();
    }


    /**
     * Initialize implementation of the Initializable interface
     * 
     * @param location
     * @param resources
     */
    @Override 
    public void initialize(URL location, ResourceBundle resources) 
    {
        initializeTableColumns();
        loadData();
    }

    /**
     * Query the database to retrieve the folder list
     */
    @SuppressWarnings("unchecked") 
    public void initializeFoldersList()
    {
        Session session = sessionFactory.getCurrentSession();
        session.beginTransaction();
        foldersList = session.createQuery("from Folder").list();
        session.close();
    }

    /**
     * Initialize columns binding to folders properties
     */
    public void initializeTableColumns()
    {
        colFolderNumber.setCellValueFactory(
                  new PropertyValueFactory<Folder,String>("folderNumber")
                      );
        colPerson.setCellValueFactory(
                new Callback<CellDataFeatures<Folder, String>, ObservableValue<String>>() {
                     public ObservableValue<String> call(CellDataFeatures<Folder, String> p) {
                         return new SimpleStringProperty(p.getValue().getFirstName() + " " + p.getValue().getLastName());
                     }}
          );
        colBirthdayDate.setCellValueFactory(
                  new PropertyValueFactory<Folder,Date>("birthdayDate")
                      );

    }

    /**
     * Put the folders list in the TableView object
     */
    public void loadData()
    {   
        ObservableList<Folder> listFold = FXCollections.observableArrayList(foldersList);       
        foldersTableView.setItems(listFold);
    }   
}

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

<?import java.lang.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.control.Label?>


<VBox fx:id="view" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2" fx:controller="pappu.controllers.FolderListController">
    <Label fx:id="lblTest"></Label>
    <TableView fx:id="foldersTableView">
        <columns>
            <TableColumn prefWidth="75.0" text="N°" fx:id="colFolderNumber">
            </TableColumn>
            <TableColumn prefWidth="75.0" text="Personne" fx:id="colPerson">
            </TableColumn>
            <TableColumn prefWidth="75.0" text="Date de naissance" fx:id="colBirthdayDate">
            </TableColumn>
        </columns>
    </TableView>
</VBox>

package pappu.controllers;

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

import org.hibernate.Session;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.control.TextField;
import javafx.scene.layout.Pane;
import pappu.core.AppFactory;
import pappu.core.controller.AbstractController;
import pappu.entities.Folder;
import pappu.entities.Gender;

public class FolderFormAddController extends AbstractController
{   
    @FXML TextField folderNumber;
    @FXML TextField firstName;
    @FXML TextField lastName;
    public void submitForm() throws IOException
    {   
        Session session = sessionFactory.getCurrentSession();
        session.beginTransaction();

        Folder folder = new Folder();

        folder.setFolderNumber(folderNumber.getText());
        folder.setFirstName(firstName.getText());
        folder.setLastName(lastName.getText());
        folder.setGender(Gender.m);

        session.save(folder);
        session.getTransaction().commit();
            // This doesn't work.. even tried with a simple Label
        AppFactory app = new AppFactory();
        FolderListController flc = app.folderListController();
        flc.initializeFoldersList();
        flc.loadData();
    }
}

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

<?import java.lang.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<VBox fx:id="view" prefHeight="216.0" prefWidth="421.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2" fx:controller="pappu.controllers.FolderFormAddController">
  <children>
    <Label prefHeight="26.0" prefWidth="102.0" text="Numéro de dossier" />
    <TextField prefWidth="200.0" fx:id="folderNumber"/>
    <Label text="Prénom" />
    <TextField prefWidth="200.0" fx:id="firstName"/>
    <Label text="Nom" />
    <TextField prefWidth="200.0" fx:id="lastName"/>
    <Button mnemonicParsing="false" onAction="#submitForm" text="Enregistrer" />
  </children>
</VBox>

精确度:
我在此基础上开发了我的应用程序:http://www.zenjava.com/2011/10/25/views-intern-views-controllers-intern-controllers/，我在Java JDK 7上使用JavaFX 2

我觉得JavaFX应用程序的全局功能缺少一些东西。

Answer 1

对于那些对如何将fx:controller=“controller”从FXML文件传递到主类和/或控制器感到困惑的程序员，我找到了一个易于实现的解决方案。以允许这些类之间的对象引用。

From main.java->start method:(With fx:controller=“controller”）在FXML文件中

    FXMLLoader loader = new FXMLLoader();
    Parent root = loader.load(getClass().getResource("Window1.fxml").openStream());
    Controller controller = loader.getController();
    controller.setReferenceToController(controller);

最后一行[controller.SetReferenceToController（控制器）；]将从FXML文件加载的对象“Controller”传递到其自身。

    private Controller controller;
    private DataProcess data;

    public void setReferenceToController(Controller controller){
    this.controller = controller;
    data = new DataProcess(controller);
}

    public DataProcess(Controller controller) {
            this.controller = controller;
        }

    //Call this method from Controller
    public void handleSaveClick(){
        if(file != null){

        //save a bunch of data
        controller.setSaveStatus(true);

        }
        else
        controller.setSaveStatus(false);

希望这能有所帮助。