Javafx不显示嵌套组件 [英] Javafx doesn't display a nested component

问题描述

要继续此帖子，我实施了建议的解决方案的一部分.

To continue this post, I implemented part of the solution that was suggested.

我有我的主面板，我想在其上画一个不同类的组件(方向盘).

I have my main panel and I want to drew on it a component which is a different class (steerwheel).

我的主控制器:

public class WindowController {

    @FXML SteerWheel steerwheel;
     ... other componenets..
}

我的新组件:

  public SteeringWheel() {
  myLabel = new Label();
  innerCircle = new Circle();
  backgroundCircle = new Circle();
  System.out.println("steerwheel created.");

  }
  
  .. other methods..

我的mainwindow.fxml文件:

My mainwindow.fxml file :

<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.layout.*?>
<?import view.SteerWheel?>
<BorderPane xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/9.0.1" fx:controller="view.WindowController">
   <center>
    <SteerWheel fx:id="steerwheel" />
   </center>
</BorderPane>

和我的steerwheel.fxml文件:

and my steerwheel.fxml file :

<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.Slider?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.StackPane?>
<?import javafx.scene.shape.Circle?>
<?import javafx.scene.text.Font?>
<AnchorPane xmlns="http://javafx.com/javafx"
            xmlns:fx="http://javafx.com/fxml"
            fx:controller="view.SteerWheel"
            prefHeight="400.0" prefWidth="600.0">

    <Label fx:id="mylabel" prefHeight="30.0" prefWidth="102.0" text="mytest"  translateY="30" translateX="90">
      <StackPane >
        <Circle fx:id="innerCircle" fill="darkgray" radius="170"  />
        <Circle fx:id="backgroundCircle " fill="black"  radius="80" />
    </StackPane>
    
</AnchorPane>

我的主要代码加载了fxml文件(与所有提到的文件都位于不同的文件中):

My main code that loads the fxml files (in a different file from all mentioned) :

public class Main extends Application {
public static Stage primaryStage;

@Override
public void start(Stage primary_stage) {
    this.primaryStage=primary_stage;
FXMLLoader fxl=new FXMLLoader();
try {
    BorderPane root = fxl.load(getClass().getResource("mainwindow.fxml").openStream());

    WindowController wc=fxl.getController(); 
    Scene scene = new Scene(root,700,700);
    primaryStage.setScene(scene);
    primaryStage.show();
} catch (IOException e) {
    e.printStackTrace();
}

我看到了构造函数的输出，但是输出到了控制台，但是该组件没有显示在窗口上.

I'm seeing the constructor`s output but to the console but the component isn't displayed on the window.

我尝试在Window.fxml中添加对方向盘的fxml文件的调用:

I tried to add a call for the fxml file of the steerwheel in my Window.fxml :

<BorderPane xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/9.0.1" fx:controller="view.WindowController">
    <center>
        <VBox maxHeight="-Infinity" prefHeight="450.0" prefWidth="400.0" BorderPane.alignment="TOP_CENTER">
        <children>
            <fx:include source="steerwheel.fxml" fx:id="steerwheel" />

        </children>
        </VBox>

    </center>

</BorderPane>

现在我遇到以下错误:

原因:java.lang.IllegalArgumentException:无法将view.steerWheel字段view.WindowController.steerWheel设置为javafx.scene.layout.AnchorPane

Caused by: java.lang.IllegalArgumentException: Can not set view.steerWheel field view.WindowController.steerWheel to javafx.scene.layout.AnchorPane

推荐答案

我发现以下帖子描述了我遇到的相同问题: 将数据从一个控制器传递到另一个javafx. java.lang.IllegalArgumentException @fabian还回答了该问题的解决方法.

I found the following post that described the same issue I had : Passing data from one controller to another in javafx. java.lang.IllegalArgumentException @fabian also answered there how to solve the issue.

我实施的解决方案: 我的主要fxml文件:

The solution I implemented : My main fxml file :

<BorderPane xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/9.0.1" fx:controller="view.WindowController">
    <center>
        <VBox maxHeight="-Infinity" prefHeight="450.0" prefWidth="400.0" BorderPane.alignment="TOP_CENTER">
        <children>

        <fx:include fx:id="steerwheel" source="steerwheel.fxml"  />
        </children>
        </VBox>
    </center>

</BorderPane>

在fxml文件的控件中，我添加了一个以fx:id命名的AnchorPane对象，并将steerWheel obj重命名为steerwheelController:

In the controler of the fxml file I added an AnchorPane object that named after the fx:id and I renamed the steerWheel obj to steerwheelController :

public class WindowController {
    @FXML AnchorPane steerwheel;
    @FXML steerWheel steerwheelController;

然后，我必须在主目录中使用setLocation方法才能加载内部fxml文件(否则，我会得到一个错误..):

Afterwards, I had to use the setLocation method in my main in order to load the inner fxml file (otherwise I got an error..) :

FXMLLoader fxl=new FXMLLoader();
    try {
        fxl.setLocation(getClass().getResource("Window.fxml"));
        BorderPane root = fxl.load();
        WindowController wc=fxl.getController();

希望它对某人有帮助:)

Hoping it will help someone :)

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