如何在JavaFX的控制器文件中调用舞台上的函数 [英] How to call functions on the stage in JavaFX's controller file

问题描述

我在和fxml 一起使用javafx，所以我使用控制器进行实际编码。我需要在舞台上做一些操作，例如获得x轴或y轴位置。我试过 stage.getX（）& stage.getY ，但它们不起作用（舞台名称因错误而被高举）。如何在控制器中使用此类功能？我尝试在我的主文件中执行此操作：

I am using javafx along with fxml, so I use the controller for the real coding. I need to do a few operations on the stage, such as getting its x- or y-axis position. I have tried stage.getX() & stage.getY, but they don't work(the stage name is high-lited as the error). How do I use such functions in my controller? I tried doing this in my main file:

 public int locationX = stage.getX();

和

public double locationX = stage.getX();

但它不起作用，反而使整个程序出现一个大错误。

那么如何在我的控制器文件中执行此类功能？我是否需要以其他方式导入某些内容或执行上述操作？

But it doesn't work, instead makes the whole program one big error.
So how do I get to do such functions in my controller file? Do I need to import something or do something like above in another way?

error: cannot find symbol
    locationX = stage.getX();
symbol:   variable stage
location: class FXMLController

我知道缺少舞台。但是如何在我的控制器中获得阶段？

推荐答案

从 root fxml 文件中的窗格：

@FXML
Parent root

您可以通过以下方式获得舞台：

You can get the stage from it by:

Stage stage = (Stage) root.getScene().getWindow()

你可以参考你的舞台，你可以做你想做的事。

You have a reference to your stage, you can do what you want.

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