如何使按钮在另一个类JAVAFX中工作

Question

import java.io.IOException;

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.fxml.FXMLLoader;
import javafx.stage.Modality;
import javafx.stage.Stage;
import vp.dict.model.Data;
import vp.dict.view.ContentController;
import vp.dict.view.EditDialogController;
import vp.dict.view.RootController;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.BorderPane;


public class MainApp extends Application {

    private Stage window;
    private BorderPane rootLayout;

    private ObservableList<Data> dataList = FXCollections.observableArrayList();

    public MainApp(){
        dataList.add(new Data("Hi", "Haj", "Ahoj, cau"));
        dataList.add(new Data("Hello", "Helou", "Ahoj"));
        dataList.add(new Data("New", "Nju", "Novy"));
    }

    public ObservableList<Data> getDataList(){
        return dataList;
    }

    public void start(Stage window) throws IOException {
        this.window = window;
        this.window.setTitle("EN/CZ Dictionary 2017");

        initRootLayout();
        initContent();
    }

    public void initRootLayout() throws IOException{
        FXMLLoader loader = new FXMLLoader();
        loader.setLocation(getClass().getResource("../view/rootLayout.fxml"));
        rootLayout = (BorderPane)loader.load();

        Scene scene = new Scene(rootLayout);
        window.setScene(scene);
        RootController controller = loader.getController();
        controller.setMainApp(this);

        window.show();
    }

    public void initContent() throws IOException{
        FXMLLoader loader = new FXMLLoader();
        loader.setLocation(getClass().getResource("../view/contentLayout.fxml"));
        AnchorPane ap = (AnchorPane)loader.load();

        rootLayout.setCenter(ap);
        ContentController controller = loader.getController();
        controller.setMainApp(this);

    }

    public boolean showEditWindow(Data data) throws IOException{
        FXMLLoader loader = new FXMLLoader();
        loader.setLocation(getClass().getResource("../view/editDialogLayout.fxml"));
        AnchorPane ap = (AnchorPane)loader.load();

        Stage editWindow = new Stage();
        editWindow.setTitle("Add a New Word");
        editWindow.initModality(Modality.WINDOW_MODAL);
        editWindow.initOwner(window);

        Scene scene = new Scene(ap);
        editWindow.setScene(scene);

        EditDialogController controller = loader.getController();
        controller.setStage(editWindow);
        controller.setData(data);

         editWindow.showAndWait();

         return controller.isOkClicked();
    }

    public Stage getWindow(){
        return window;
    }

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

package vp.dict.view;

import java.io.IOException;

import javafx.fxml.FXML;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import vp.dict.main.MainApp;
import vp.dict.model.Data;

public class ContentController {

    @FXML
    private TableView<Data> dataTable;

    @FXML
    private TableColumn<Data, String> englishColumn;

    @FXML
    private TableColumn<Data, String> pronunciationColumn;

    @FXML
    private TableColumn<Data, String> meaningColumn;

    private MainApp mainApp;

    public ContentController(){

    }

    @FXML
    public void initialize(){
        englishColumn.setCellValueFactory(CellData -> CellData.getValue().englishProperty());
        pronunciationColumn.setCellValueFactory(CellData -> CellData.getValue().pronunciationProperty());
        meaningColumn.setCellValueFactory(CellData -> CellData.getValue().meaningProperty());
    }

    public void setMainApp(MainApp mainApp){
        this.mainApp = mainApp;

        dataTable.setItems(mainApp.getDataList());
    }

    public TableView<Data> geTableView(){
        return dataTable;
    }
}

RootController类是我需要进行工作的地方。在方法private void handleDelete（）中，您可以在注释中看到一些代码，这是一个工作代码，但我无法找到从ContentController类加载数据的方法，这是上面的代码垃圾。

package vp.dict.view;

import java.io.IOException;

import javax.security.auth.login.Configuration;

import javafx.fxml.FXML;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.control.TableView;
import vp.dict.main.MainApp;
import vp.dict.model.Data;

public class RootController {

    private MainApp mainApp;

    public void initialize(){

    }

    public RootController(){

    }

    public void setMainApp(MainApp mainApp){
        this.mainApp = mainApp;
    }

    @FXML
    private void addClicked() throws IOException{
        Data tempData = new Data();
        boolean okClicked = mainApp.showEditWindow(tempData);
        if(okClicked){
            mainApp.getDataList().add(tempData);
        }
    }

    @FXML
    private void handleDelete() throws IOException{



      /*  int selectedIndex = contentTable.geTableView().getSelectionModel().getSelectedIndex();
        if (selectedIndex >= 0) {
            contentTable.geTableView().getItems().remove(selectedIndex);
        } else {
            // Nothing selected.
            Alert alert = new Alert(AlertType.WARNING);
            alert.initOwner(mainApp.getWindow());
            alert.setTitle("No Selection");
            alert.setHeaderText("No Person Selected");
            alert.setContentText("Please select a person in the table.");

            alert.showAndWait();
        }*/
    }       
}

我将感谢任何关于如何使它工作的想法。

Answer 1

首先，您无法从rootcontroller访问contentcontroller，因为这两者之间没有任何引用。其次，让contentcontroller来处理它可能更简单，而rootcontroller只做通知。

好吧，我把执行命令弄乱了一点。这才是正确的。

MainApp：

private void RootController rootController;

...

// In initRoot()
this.rootController = loader.getController();

// Replace the below line in initContent():
//ContentController controller = loader.getController();
//controller.setMainApp(this);
ContentController controller = loader.getController();
controller.setMainApp(this);
this.rootController.setContentController(controller);

private ContentController contentController;
public void setContentController(ContentController content)
{
    this.contentController = content;
}

...

@FXML
private void handleDelete() throws IOException
{
    if (this.contentController != null)
        this.contentController.handleDelete();
}

public void handleDelete()
{
    // Whatever delete logic you originally had here
}