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确定是否已切断JLabel文本？

[英]Determine Whether JLabel Text is Being Cut Off?

原文 2019-05-10 18:46:13 7 1 java/ swing/ text/ jframe/ jlabel

I have a JLabel, and as the JFrame window expands, the font size automatically changes. 我有一个JLabel，随着JFrame窗口的扩展，字体大小会自动更改。 The text that is in the JLabel can either be abbreviated or put in full text like so: JLabel中的文本可以缩写或以全文形式输入，如下所示：

大小窗口示例

Because I am using Eclipse's "AbsoluteLayout" for Swing ( frame.getContentPane().setLayout(null) ), JLabels won't automatically resize to the size of the texts and are fixed values. 因为我在Swing中使用Eclipse的“ AbsoluteLayout”（ frame.getContentPane().setLayout(null) ）， frame.getContentPane().setLayout(null)不会自动将其大小调整为文本大小，并且是固定值。 Note that I do change those fixed values as the window changes size. 请注意，随着窗口更改大小，我确实更改了这些固定值。 I already have an algorithm for this. 我已经有一个算法了。

Instead of doing a large calculation determining whether the window is large enough to display the un-abreviated text, I would like to know if there is a way to determine whether my text would appear like this: 我想进行大量的计算，而不是确定窗口是否足够大以显示未缩写的文本，而是想知道是否有一种方法可以确定我的文本是否显示如下：

剪下JLabel文字

If I could know that the text would be cut off (due to long text in a small JLabel), I could abbreviate the text, otherwise display it in full. 如果我知道文本会被截断（由于在小JLabel中的长文本），则可以缩写文本，否则将其完整显示。

Is there any way to do what I'm asking while still using the AbsoluteLayout? 在仍然使用AbsoluteLayout的同时，有什么方法可以做我要问的吗？

Note: It is necessary that I use AbsoluteLayout, so don't bother commenting about it even though it is typically regarded as bad practice. 注意：我必须使用AbsoluteLayout，因此即使通常认为它是不好的做法，也不要理会它。

1 个解决方案

If I could know that the text would be cut off (due to long text in a small JLabel), I could abbreviate the text, otherwise display it in full. 如果我知道文本会被截断（由于在小JLabel中的长文本），则可以缩写文本，否则将其完整显示。

Compare the width of getPreferredSize() and getSize() . 比较getPreferredSize()和getSize()的宽度。