Eclipse Community Forums: JFace » Resize tree on collapsing and expanding

Home » Eclipse Projects » JFace » Resize tree on collapsing and expanding

Resize tree on collapsing and expanding [message #1748340]

Tue, 22 November 2016 06:04

Eclipse User

Hi,

I like to resize the tree when the tree collapses and expands so that it only takes up the space that it needs. For this I am using this piece of code:

	tree.addTreeListener(new TreeListener()
	{
		@Override
		public void treeExpanded(TreeEvent e)
		{
			tree.getParent().pack();
		}

		@Override
		public void treeCollapsed(TreeEvent e)
		{
			tree.getParent().pack();
		}
	});

However, the events are to early to call pack on the parent and no resize is done. When calling pack just a little bit later works perfectly. Is there anybody that does know how to solve this?

Thanks, Michiel

[Updated on: Tue, 22 November 2016 06:24] by Moderator

Re: Resize tree on collapsing and expanding [message #1748421 is a reply to message #1748340]

Tue, 22 November 2016 19:47

Eclipse User

You can use asyncExec() to submit a task to run in the UI event queue:

tree.getDisplay().asyncExec(new Runnable() {
   public void run() {
      tree.getParent().pack();
   }});

That's usually sufficient.

Re: Resize tree on collapsing and expanding [message #1748451 is a reply to message #1748421]

Wed, 23 November 2016 04:46

Eclipse User

Thanks Brian! This solves the issue.

Previous Topic:	Slow reaction of Eclipse Editors on a Windows VM
Next Topic:	TableViewer hiding columns in MAC

Goto Forum:

-=] Back to Top [=-

Current Time: Thu Jul 17 00:07:09 EDT 2025

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter