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How to make JLabel to have size to accomodate text only?  RSS feed

 
Bin Smith
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Eclipse IDE Java
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Hello!

I am doing my own tooltip like that for eclipse doc.
For this I use JDialog which has child JLabel wrapped inside JScrollPane.
Of course as user moves cursor I need to change text of JLabel.
The most important is that I want JLabel to have just enough size to accomodate text only.
And if text is too big and size of JLabel should be very big then I want to decrease size of JLabel.

The problem for me is how to calculate and resize JDialog with JLabel so that JLabel is large enough to accomodate its text.

I guess I need to calculate size of JLabel using its text . But I do not know how to do that and also how to resize JLabel dynamically.
 
Bin Smith
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Hello!

I solved this problem already!

Now I calculate size of JLabel for new text as so:

tempLabel.getPreferredSize() always returns preferred size of JLabel that acommodates the whole text and nothing more.

Thanks again!
 
Piet Souris
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It also depends on the LayoutManager you are using. Some of these determine the size by themselves,
no matter what preferred size there is.

Can't you simply set the text in your label, and then call label.revalidate() and label.repaint()?
 
Darryl Burke
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Piet Souris wrote:Can't you simply set the text in your label, and then call label.revalidate() and label.repaint()?

Not needed. From JLabel.java
 
Don't get me started about those stupid light bulbs.
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