Java Swing getToolkit 和自定义光标奇怪的行为

发布于 2024-12-13 18:29:40 字数 732 浏览 0 评论 0原文

我正在我的 Netbeans Java Swing 应用程序中创建自定义光标。例如，当“cursorImage”是磁盘上的图像文件时，我会像这样创建默认光标：

Cursor defaultCursor = toolkit.createCustomCursor(cursorImage, hotspot, name);

一旦我开始使用自定义光标，我的应用程序就开始出现非常奇怪的错误，我什至无法解释。通过排查，我发现问题出在下面的代码上。此代码与我的应用程序（Netbeans SingleFrameApplication）相关。

Toolkit toolkit = MyApp.getApplication().getMainView().getRootPane()
.getToolkit().getDefaultToolkit();

该代码存在于一个名为 CursorController 的简单非 GUI POJO 类中。

我用这段代码替换了它：

Component c = new JButton("getToolkit");
Toolkit toolkit = c.getToolkit();

我什至不在任何地方显示该按钮。但现在 bug 已经消失了。

问题是我不明白这个问题或者为什么它现在（显然）得到解决。我不太有信心我已经以正确的方式解决了这个问题。我不应该仅仅为了获取工具包而创建一个按钮，对吧？

原文

I am creating custom cursors in my Netbeans Java Swing app. For example, where 'cursorImage' is an image file on disk, I create my default cursor like so:

Cursor defaultCursor = toolkit.createCustomCursor(cursorImage, hotspot, name);

Once I starting using custom cursors, my application started exhibiting very strange bugs that I cannot even explain. Through troubleshooting, I found the following code to be the problem. This code is related to my app being a Netbeans SingleFrameApplication.

Toolkit toolkit = MyApp.getApplication().getMainView().getRootPane()
.getToolkit().getDefaultToolkit();

The code exists in a simple non-GUI POJO class called CursorController.

I replaced it by this code:

Component c = new JButton("getToolkit");
Toolkit toolkit = c.getToolkit();

I don't even display the button anywhere. But the bugs are gone now.

The problem is that I do not understand the problem or why it is (apparently) resolved now. I'm not very confident that I have solved it the right way. I shouldn't really create a button just to get the toolkit, right?

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