java which layout manager suitable for this task?

Question

I have a JPanel parent with 3 JPanel children inside. They all currently make use of GridLayout and together represent a UML class. Problem is that when I add a new attribu

Answer 1

You can use a GridBagLayout for this. I think what worked for me was

• add a fourth sub-panel to the top panel
• set the weighty for the top three panels to 0
• set the weighty for the bottom (new) panel to 1
• depending on what technique you are using to render the text in the sub-panels, you may need to set the preferred size of sub-panels explicitly.
• when you add new items to the sub-panels, you'll need to invalidate and re-layout the whole thing.