在同一场景中加载新的 fxml

问题描述

我有 2 个 fxml 文件:

• 布局(标题、菜单栏和内容)
• Anchorpane(它应该放在另一个 fxml 文件的内容中)

我想知道如何从主"场景加载内容空间内的第二个文件.在 javaFX 中工作是一件好事还是加载新场景更好?

我正在尝试做这样的事情，但它不起作用:

@FXML私人 AnchorPane 内容；@FXML私有无效 handleButtonAction(ActionEvent 事件){content = (AnchorPane) FXMLLoader.load("vista2.fxml");}

感谢您的帮助.

解决方案

为什么你的代码不起作用

加载程序创建了一个新的 AnchorPane，但您永远不会将新窗格添加到场景图中的父级.

快速修复

代替:

content = (AnchorPane) FXMLLoader.load("vista2.fxml");

写:

content.getChildren().setAll(FXMLLoader.load("vista2.fxml"));

用您的新远景替换内容儿童.内容本身保留在场景图中，因此当您设置它的子项时，您也同时将它们附加到场景图中.

您可能需要调整布局(例如，使用 StackPanes 等自动调整大小的布局而不是 AnchorPanes)以获得所需的确切行为.

与其只采用快速修复，我建议您查看下面链接的简单框架，因为这可能会为您提供一个更通用的机制来获得您想要的行为.

参考 FXML 导航框架

我创建了一个 .

寻找更简单的东西?

只需更换场景根:在 JavaFX 中更改场景.

其他选择?

动画过渡和其他:在 JavaFX 中的窗格之间切换

I have 2 fxml files:

• Layout (header, menubars and content)
• Anchorpane (it's supposed to be placed inside the content from the other fxml file)

I would like to know how can I load the second file inside the content space from the "Master" scene. And is that a good thing to do working in javaFX or is it better to load a new scene?

I'm trying to do something like this, but it doesn't work:

@FXML
private AnchorPane content;

@FXML
private void handleButtonAction(ActionEvent event) {
    content = (AnchorPane) FXMLLoader.load("vista2.fxml");
}

Thanks for the help.

解决方案

Why your code does not work

The loader creates a new AnchorPane, but you never add the new pane to a parent in the scene graph.

Quick Fix

Instead of:

content = (AnchorPane) FXMLLoader.load("vista2.fxml");

Write:

content.getChildren().setAll(FXMLLoader.load("vista2.fxml"));

Replacing the content children with your new vista. The content itself remains in the scene graph, so when you set it's children, you are also attaching them to the scene graph at the same time.

You might need to play around with layout (e.g. work with auto resizing layouts like StackPanes rather than AnchorPanes) to get the exact behaviour you want.

Rather than just adopting the quick fix, I would advise reviewing the simple framework linked below as that might provide you with a more general purpose mechanism to get the behaviour you want.

Reference FXML Navigation Framework

I created a small framework for swapping fxml controlled content panes in and out of a portion of the main scene.

The mechanism of the framework is the same as suggested in kithril's answer.

1. A main pane for the outer fxml acts as a holder for child panes.
2. The main controller for the outer fxml supplies a public method that can be used to swap the child panes.
3. A convenience navigator class is statically initialized with the main controller for the outer layout.
4. The navigator provides a public static method to load a new child pane into the main container (by invoking a method on the main controller).
5. Child panes are generated in the navigator by their respective fxml loaders.

Why a Framework

The framework seems like overkill for answering your question, and perhaps it is. However, I have found that the two most asked topic related to FXML are:

1. Navigation between panes generated by FXML (this question).
2. How to pass data between FXML controllers.

So I felt that a small demo framework was warranted for this case.

Sample Framework Output

The first screen shows the application layout displaying the first vista. The contents are a header which is defined in the main application layout and an aliceblue colored interchangable child content pane.

In the next screen, the user has navigated to the second vista, which retains the constant header from the main layout and replaces the original child pane with a new coral colored child content pane. The new child has been loaded from a new fxml file.

Looking for Something More Substantial?

A lightweight framework which is more extensive and better supported than the sample framework from this question is afterburner.fx.

Looking for Something Even Simpler?

Just swap out the scene root: Changing Scenes in JavaFX.

Other Options?

Animated Transitions and others: Switch between panes in JavaFX

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