JavaFX-加载下一个场景时保留工具栏

加载新场景时如何保留工具栏

这是我目前的代码：

Main.class

    public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("Main.fxml"));
        primaryStage.setTitle("Test FXML application");
        primaryStage.setScene(new Scene(root, 400, 400));
        primaryStage.show();
    }

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

public class Main extends Application {
  private static Stage pStage;

  // Creating a static root to pass to the controller
  private static BorderPane root = new BorderPane();


  @Override
  public void start(Stage primaryStage) throws Exception {
    Parent main = FXMLLoader.load(getClass().getResource("Main.fxml"));

    AnchorPane screen1 = FXMLLoader.load(getClass().getResource("screen1.fxml"));

    root.setTop(main);
    root.setCenter(screen1);

    primaryStage.setTitle("Test FXML application");
    primaryStage.setScene(new Scene(root, 400, 400));
    primaryStage.show();
  }

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

  /**
   * Just a root getter for the controller to use
   */
  public static BorderPane getRoot() {
    return root;
  }

public class Controller {
  @FXML
  private void testButton1() throws IOException {
    try {
      AnchorPane screen1 = FXMLLoader.load(getClass().getResource("screen1.fxml"));
      BorderPane border = Main.getRoot();
      border.setCenter(screen1);
    }
    catch (IOException e) {
      e.printStackTrace();
    }
  }
  @FXML
  private void testButton2() throws IOException {
    try {
      AnchorPane screen2 = FXMLLoader.load(getClass().getResource("screen2.fxml"));
      BorderPane border = Main.getRoot();
      border.setCenter(screen2);
    }
    catch (IOException e) {
      e.printStackTrace();
    }
  }
}

Main.fxml

<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.ToolBar?>
<GridPane fx:controller="main.java.Controller"
          xmlns:fx="http://javafx.com/fxml">
    <ToolBar prefHeight="40.0" prefWidth="400.0">
        <Button text="testButton" onAction="#testButton"/>
    </ToolBar>
</GridPane>

---

对于替换部分内容，有比

GridPane

更合适的布局，但基本上您需要为

工具栏

使用父级，以便替换其他子级。在这种情况下，

BorderPane

可能是个好主意，但也可以使用

GridPane

来实现；只是不那么优雅

如果您继续使用

网格窗格

，使用

fx:id

注入它，确保

工具栏

是您要保留的唯一子项，它是第一个子项，也是位于

行索引=0，列索引=0）的唯一子项

，您还可以手动删除其他子项：

@FXML
private GridPane container;

@FXML
private void testButton1() throws IOException {
    ObservableList<Node> children = container.getChildren();
    children.remove(1, children.size()); // remove every child after the first
    try {
        container.add(FXMLLoader.load(getClass().getResource("src/testButton1.fxml")), 0, 1);
        container.getScene().getWindow().sizeToScene(); // resize scene to fit the full size of the content
    } catch (IOException e) {
        e.printStackTrace();
    }
}

@FXML
专用网格窗格容器；
@FXML
私有void testButton1（）引发IOException{
ObservableList children=container.getChildren（）；
children.remove（1，children.size（））；//删除第一个
试一试{
add（fxmloader.load（getClass（）.getResource（“src/testButton1.fxml”）），0，1）；
container.getScene（）.getWindow（）.sizeToScene（）；//调整场景大小以适应内容的完整大小
}捕获（IOE异常）{
e、 printStackTrace（）；
}
}

对于包含工具栏的主阶段，您需要有一个单独的

FXML

，然后使用

边框窗格

可以在工具栏和其他屏幕之间进行分隔

参见下面的示例

Main.class

    public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("Main.fxml"));
        primaryStage.setTitle("Test FXML application");
        primaryStage.setScene(new Scene(root, 400, 400));
        primaryStage.show();
    }

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

public class Main extends Application {
  private static Stage pStage;

  // Creating a static root to pass to the controller
  private static BorderPane root = new BorderPane();


  @Override
  public void start(Stage primaryStage) throws Exception {
    Parent main = FXMLLoader.load(getClass().getResource("Main.fxml"));

    AnchorPane screen1 = FXMLLoader.load(getClass().getResource("screen1.fxml"));

    root.setTop(main);
    root.setCenter(screen1);

    primaryStage.setTitle("Test FXML application");
    primaryStage.setScene(new Scene(root, 400, 400));
    primaryStage.show();
  }

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

  /**
   * Just a root getter for the controller to use
   */
  public static BorderPane getRoot() {
    return root;
  }

public class Controller {
  @FXML
  private void testButton1() throws IOException {
    try {
      AnchorPane screen1 = FXMLLoader.load(getClass().getResource("screen1.fxml"));
      BorderPane border = Main.getRoot();
      border.setCenter(screen1);
    }
    catch (IOException e) {
      e.printStackTrace();
    }
  }
  @FXML
  private void testButton2() throws IOException {
    try {
      AnchorPane screen2 = FXMLLoader.load(getClass().getResource("screen2.fxml"));
      BorderPane border = Main.getRoot();
      border.setCenter(screen2);
    }
    catch (IOException e) {
      e.printStackTrace();
    }
  }
}

控制器类

    public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("Main.fxml"));
        primaryStage.setTitle("Test FXML application");
        primaryStage.setScene(new Scene(root, 400, 400));
        primaryStage.show();
    }

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

public class Main extends Application {
  private static Stage pStage;

  // Creating a static root to pass to the controller
  private static BorderPane root = new BorderPane();


  @Override
  public void start(Stage primaryStage) throws Exception {
    Parent main = FXMLLoader.load(getClass().getResource("Main.fxml"));

    AnchorPane screen1 = FXMLLoader.load(getClass().getResource("screen1.fxml"));

    root.setTop(main);
    root.setCenter(screen1);

    primaryStage.setTitle("Test FXML application");
    primaryStage.setScene(new Scene(root, 400, 400));
    primaryStage.show();
  }

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

  /**
   * Just a root getter for the controller to use
   */
  public static BorderPane getRoot() {
    return root;
  }

public class Controller {
  @FXML
  private void testButton1() throws IOException {
    try {
      AnchorPane screen1 = FXMLLoader.load(getClass().getResource("screen1.fxml"));
      BorderPane border = Main.getRoot();
      border.setCenter(screen1);
    }
    catch (IOException e) {
      e.printStackTrace();
    }
  }
  @FXML
  private void testButton2() throws IOException {
    try {
      AnchorPane screen2 = FXMLLoader.load(getClass().getResource("screen2.fxml"));
      BorderPane border = Main.getRoot();
      border.setCenter(screen2);
    }
    catch (IOException e) {
      e.printStackTrace();
    }
  }
}

Main.fxml（由场景生成器生成）

场景1

<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="210.0" prefWidth="407.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1">
    <children>
        <Label layoutX="10.0" layoutY="10.0" prefHeight="36.0" prefWidth="374.0" text="SCREEN 1">
            <font>
                <Font name="System Bold" size="36.0" />
            </font>
        </Label>
    </children>
</AnchorPane>