如何从对子fxml组件执行操作中更改父fxml内容？

Question

<BorderPane prefHeight="400.0" prefWidth="1000.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.nikunj.drclinic.controller.RootLayoutController">
<center>
  <AnchorPane fx:id="dashboard" BorderPane.alignment="CENTER" />
</center>
<top>
  <HBox BorderPane.alignment="CENTER">
     <children>
        <fx:include fx:id="mainMenu" source="MainMenuBar.fxml" />
     </children>
  </HBox>
</top>
</BorderPane>

为此使用的控制器是RootLayoutController.java

public class RootLayoutController {

 @FXML
 private MainMenuBarController mainMenuBarController;

 @FXML
 private AnchorPane dashboard;

 @FXML
 private void initialize() {
    // Initialize the person table with the two columns.
 }
}

从这个MainMenubar.fxml文件内部也会加载，它是子fxml文件

<AnchorPane xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.nikunj.drclinic.controller.MainMenuBarController">
   <children>
      <MenuBar layoutY="2.0" prefWidth="1000.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
        <menus>
          <Menu mnemonicParsing="false" text="File">
            <items>
              <MenuItem mnemonicParsing="false" onAction="#closeApplication" text="Close" />
            </items>
          </Menu>
          <Menu mnemonicParsing="false" text="Patient Detail">
            <items>
              <MenuItem fx:id="addPatiendMenuItem" mnemonicParsing="false" onAction="#addPatient" text="Add Patient" />
                  <MenuItem mnemonicParsing="false" text="Find Patient" />
            </items>
          </Menu>
        </menus>
      </MenuBar>
   </children>
</AnchorPane>

此MainMenubar.fxml的控制器文件为MainMenubarController.java

public class MainMenuBarController {

 @FXML
 private MenuItem addPatiendMenuItem;

 @FXML
 private MenuItem findPatientMenuItem;

 @FXML
 public void closeApplication(){
    System.exit(0);
 }

 @FXML
 public void addPatient(ActionEvent event){

 }
}

我花了很多时间去寻找，如何从对子控制器组件执行的操作中更改父控制器组件？

Answer 1

在MainMenubarController中创建一个属性，该属性表示您正在更改的状态（“视图状态”）。要使这变得有意义，需要对应用程序有更多的了解，但您可以执行以下操作：

public class MainMenuBarController {
    private final BooleanProperty addPatientRequested = new SimpleBooleanProperty();
    public BooleanProperty addPatientRequestedProperty() {
        return addPatientRequested ;
    }
    public final boolean isAddPatientRequested() {
        return addPatientRequestedProperty().get();
    }
    public final boolean setAddPatientReqested(boolean requested) {
        addPatientReqestedProperty().set(requested);
    }

    @FMXL
    private void addPatient(ActionEvent event) {
        setAddPatientRequested(true);
    }
}

然后在“父”控制器中执行

public class RootLayoutController {

 @FXML
 private MainMenuBarController mainMenuBarController;

 @FXML
 private AnchorPane dashboard;

 @FXML
 private void initialize() {
    // Initialize the person table with the two columns.
    mainMenuBarController.addPatientRequestedProperty().addListener((obs, wasRequested, isNowRequested) -> {
        if (isNowRequested) {
            // code to execute...
        }
    });
 }
}

根据应用程序逻辑，您可能需要一个不同的属性，例如在mainmenubarcontrollerdefine中

ObjectProperty<Node> display = new SimpleObjectProperty<>();