与已经打开的 FXML 控制器通信

Question

我找了好几遍都没找到。我有一个连接到控制器的 JavaFX FXML window；这个 window 是开放的。单击 window 上的按钮会触发另一个 FXML 文件的打开，链接到其各自的控制器。

第二个 window（optionsUI.fxml 和 optionsController）有几个单选按钮。单击其中一个时，我希望 image/button 在 mainUI window 中的位置发生变化。我该怎么做？

主控制器：

public void assetPressed(MouseEvent event) {
        //Get the source of Handler
        HUDButton button = (HUDButton) event.getSource();

        //Check if an asset is already selected
        //----do a thing
            //Open stage
            openStage(currentAsset);

        } else {
            //if the current asset selected and the new asset clicked are the same
            //----do something
                closeStage();
            }
            //if the current asset selected and the new asset clicked are different
            else {
                //----do something else
                assetIsSelected = true;
                openStage(currentAsset);
            }
        }
    }
//opening optionsUI.fxml
public void openStage(Asset asset) {

        FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("optionsUI.fxml"));

        Parent root = null;
        try {
            root = fxmlLoader.load();
        } catch (IOException e) {
            e.printStackTrace();
        }
        optionsController controller = fxmlLoader.getController();

        Scene scene = new Scene(root, 300, 450);
        stage.setScene(scene);
        if (alreadyExecuted == false) {
            stage.initStyle(StageStyle.UNDECORATED);
            stage.initOwner(stageControls); //Making the mainUI the owner of the optionsUI
            stage.setTitle("HUDEdit Version 3.0.0");
            alreadyExecuted = true;
        }

我遇到的主要问题是在单选按钮上添加事件处理程序，这将更改按下的按钮 (currentButton) 的属性。我搜索了这个问题，但我得到的是我已经完成的：使用其他 FXML 文件中存在的新值打开一个新阶段。

Answer 1

你可以在你的 OptionsController 中做这样的事情（顺便说一句，我将重命名一些东西以符合标准 naming conventions，顺便说一句。）

这里的基本思想只是公开一个属性表示用户通过单选按钮选择的内容。

public class OptionsController {

    @FXML
    private RadioButton radioButton1 ;

    @FXML
    private RadioButton radioButton2 ;

    private SomeType someValue1 = new SomeType();
    private SomeType someValue2 = new SomeType();

    private final ReadOnlyObjectWrapper<SomeType> selectedThing = new ReadOnlyObjectWrapper<>();

    public ReadOnlyObjectProperty<SomeType> selectedThingProperty() {
        return selectedThing.getReadOnlyProperty() ;
    }

    public final SomeType getSelectedThing() {
        return selectedThingProperty().get();
    }

    public void initialize() {
        radioButton1.selectedProperty().addListener((obs, wasSelected, isNowSelected) -> {
            if (isNowSelected) {
                selectedThing.set(someValue1);
            }
        });
        radioButton2.selectedProperty().addListener((obs, wasSelected, isNowSelected) -> {
            if (isNowSelected) {
                selectedThing.set(someValue2);
            }
        });
    }

    // ...
}

现在，当您加载 Options.fxml 时，您可以观察到属性并在它的值发生变化时执行您需要的任何操作：

public void openStage(Asset asset) {

    FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("optionsUI.fxml"));

    Parent root = null;
    try {
        root = fxmlLoader.load();
    } catch (IOException e) {
        e.printStackTrace();
    }
    OptionsController controller = fxmlLoader.getController();
    controller.selectedThingProperty().addListener((obs, oldSelection, newSelection) -> {
        // do whatever you need with newSelection....
    });

    // etc...
}

与已经打开的 FXML 控制器通信

Communicating with an FXML Controller that's already open

java

javafx

fxml