Eclipse Community Forums: JFace » How can I programmatically expand items in a TreeViewer?

Help

Home

Home » Eclipse Projects » JFace » How can I programmatically expand items in a TreeViewer?

Show: Today's Messages :: Show Polls :: Message Navigator

How can I programmatically expand items in a TreeViewer? [message #1200466]

Thu, 21 November 2013 08:54

Martin Schröder

Messages: 3
Registered: June 2013

Junior Member

I have a TreeViewer with an ILazyTreeContentProvider. I want to control the expansion of the top-level tree items: Initially they are unexpanded, but when an Action "Expand" is selected, the item should be expanded.

In the action.run() I currently do

final EntityTreeNode projectNode = (EntityTreeNode) ((ITreeSelection) 
    viewer.getSelection()).getFirstElement();
// notify the content provider that the node should be expanded; it creates child nodes 
// and updates the child count and calls viewer.setChildCount
((LazyEntityModelViewContentProvider) viewer.getContentProvider()).expandProject(projectNode);
viewer.expandToLevel(projectNode, 2);                   
viewer.refresh(projectNode);

But the node is not expanded. It should at least change it's icon to show that it has children..

Report message to a moderator

Previous Topic:	pre-submit validation of controls
Next Topic:	[Databinding] Bind a bean with observable values as properties to table

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

]

Current Time: Sun Sep 20 22:12:10 GMT 2020

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter