How to lock a tree node so that it won't ever collapse

Thread view:

William Z. - 26 Mar 2007 18:09 GMT

I have a DefaultMutableTreeNode that sometimes collapses on certain
hardware (like a trackball) when the mouse hovers over a child node in
my JTree.

How can I lock this one single node from collapsing? It's a root node
that's hidden so that all the second level child nodes appear, making
them look like multiple root nodes.

Reply to this Message

Mark Holland - 26 Mar 2007 19:50 GMT

>I have a DefaultMutableTreeNode that sometimes collapses on certain
> hardware (like a trackball) when the mouse hovers over a child node
[quoted text clipped - 6 lines]
> making
> them look like multiple root nodes.

You could attach a listener to your tree, and prevent any collapse
events for the root node.
The following link has a good example on how to use this feature.
http://java.sun.com/docs/books/tutorial/uiswing/events/treewillexpandlistener.html

Mark

Reply to this Message

Free Magazines

Get these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...