Controller 之间的javafx通信

Question

我是 JavaFX 新手，因此我需要一些帮助来在两个 Controller 之间共享数据。

我有一个简单的窗口，其中有简单的菜单:

@FXML
Label labelLabel;

@FXML
MenuItem sbor;

@FXML
MenuItem alim_poluch;

@FXML
MenuItem paragraphs;

@FXML
MenuItem poluch_cat;

@FXML
MenuItem visluga_vid;


@FXML
AnchorPane menuPane;


@FXML
MDICanvas mdiCanvas;

@FXML
Tab tabOne;

@FXML
VislugaVidController vid;

@FXML
Tab tabTwo;

@FXML
public void initialize() {

    MDICanvas mdiCanvas = new MDICanvas(MDICanvas.Theme.DEFAULT);
    menuPane.getChildren().add(mdiCanvas);

    AnchorPane.setBottomAnchor(mdiCanvas, -1d);
    AnchorPane.setLeftAnchor(mdiCanvas, 0d);
    AnchorPane.setTopAnchor(mdiCanvas, 0d);//Button place
    AnchorPane.setRightAnchor(mdiCanvas, 0d);


    sbor.setOnAction(new EventHandler<ActionEvent>() {
        public void handle(ActionEvent event) {
            Stage stage = new Stage();
            AnchorPane pane = null;
            try {
                pane = FXMLLoader.load(getClass().getResource("/fxml/spr_pocht_sbor.fxml"));
            } catch (IOException e) {
                System.err.print("Can't open the resource file");
                e.printStackTrace();
            }
            stage.setTitle("Почтовый сбор для перевода алиментов");
            stage.setResizable(false);
            Scene scene = new Scene(pane, 600, 450);
            stage.setScene(scene);
            stage.show();
        }
    });

    alim_poluch.setOnAction(new EventHandler<ActionEvent>() {
        public void handle(ActionEvent event) {
            Stage stage = new Stage();
            AnchorPane pane = null;
            try {
                pane = FXMLLoader.load(getClass().getResource("/fxml/spr_alim_poluch.fxml"));
            } catch (IOException e) {
                e.printStackTrace();
            }

            stage.setResizable(false);
            stage.setTitle("Справочник получателей алиментов");
            Scene scene = new Scene(pane, 800, 640);
            stage.setScene(scene);
            stage.show();
        }
    });

    paragraphs.setOnAction(new EventHandler<ActionEvent>() {
        public void handle(ActionEvent event) {
            Stage stage = new Stage();
            AnchorPane pane = null;
            try {
                pane = FXMLLoader.load(getClass().getResource("/fxml/paragraf.fxml"));
            } catch (IOException e) {
                e.printStackTrace();
            }

            stage.setResizable(false);
            stage.setTitle("Параграф назначения денежных средств");
            Scene scene = new Scene(pane, 300, 450);
            stage.setScene(scene);
            stage.show();
        }
    });

    poluch_cat.setOnAction(new EventHandler<ActionEvent>() {
        public void handle(ActionEvent event) {
            Stage stage = new Stage();
            AnchorPane pane = null;
            try {
                pane = FXMLLoader.load(getClass().getResource("/fxml/poluch_cat.fxml"));
            } catch (IOException e) {
                e.printStackTrace();
            }

            stage.setResizable(false);
            stage.setTitle("Категории получателей");
            Scene scene = new Scene(pane, 600, 450);
            stage.setScene(scene);
            stage.show();
        }
    });

    visluga_vid.setOnAction(new EventHandler<ActionEvent>() {
        @Override
        public void handle(ActionEvent event) {


            AnchorPane content = null;
            try {
                content = FXMLLoader.load(getClass().getResource("/fxml/visluga_vid.fxml"));
            } catch (IOException e) {
                e.printStackTrace();
            }
            MDIWindow mdiWindow = new MDIWindow("1", new ImageView("/assets/WindowIcon.png"), "Виды выслуг", content);
            Button buttonMaximize = mdiWindow.getBtnMaximize();
            buttonMaximize.setDisable(true);
            mdiWindow.setMaxSize(350, 450);
            mdiWindow.setBtnMinimize(buttonMaximize);
            mdiCanvas.addMDIWindow(mdiWindow);


        }
    });


}

当我单击 menuItem visluga_vid.setOnAction 时，新的 mdi 窗口 将打开。然后我想从mdi窗口打开另一个窗口。 MdiWindows 有父级 (MDICanvas)，而 MDICanvas 有父级 - AnchorPane。 MDIWIndows 有自己的 Controller 和 fxml 文件。

public class VislugaVidController {

    @FXML
    TableView vislugaVidTable;

    @FXML
    TextField naim_vislugaField;

    @FXML AnchorPane menuPane;

    @FXML
    public void initialize() {

        //main.init(this);



        vislugaVidTable.setOnMousePressed(event ->  {

            if (event.isPrimaryButtonDown() && event.getClickCount() == 2) {
                    System.out.println(vislugaVidTable.getSelectionModel().getSelectedItem());
                    AnchorPane content = null;
                    try {
                        content = FXMLLoader.load(getClass().getResource("/fxml/visluga_nadb.fxml"));
                    } catch (IOException e) {
                        e.printStackTrace();
                    }


                    MDIWindow mdiWindow = new MDIWindow("1", new ImageView("/assets/WindowIcon.png"), "Надбавки", content);
                    Button buttonMaximize = mdiWindow.getBtnMaximize();
                    buttonMaximize.setDisable(true);
                    mdiWindow.setMaxSize(350, 450);
                    mdiWindow.setBtnMinimize(buttonMaximize);
                    mdiCanvas.addMDIWindow(mdiWindow);



                }

        });

    }


}

如何将 AnchorPane 和 MDICanvas 从 MainController 共享到 MDIWindowController 以打开新的 MDIWindow？

Answer 1

通常，“如何在两个 Controller 之间共享任何内容”这个问题的答案是“使用服务”。如果您考虑一下，您只需要传递数据，这些数据以某种方式在 Controller 之间持久存在。在 javaFx 世界中，这应该是一个模型。

您创建的每个 .fxml 文件只能由一个 Controller 或演示器处理。将 .fxml View 与 Controller 结合起来作为应用程序的模块。这提供了可重用性。您的应用程序应包含一个或多个模块。

我建议您也查看 the afterburner fx 。在此示例中，您可以实际看到不同模块如何相互通信。