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Bug 309406

Summary:	[Viewers] [viewers] #expandToLevel(Object, level) retrieves all children when virtual
Product:	[Eclipse Project] Platform	Reporter:	Boris Bokowski <bokowski>
Component:	UI	Assignee:	Platform UI Triaged <platform-ui-triaged>
Status:	RESOLVED WONTFIX	QA Contact:
Severity:	normal
Priority:	P3	CC:	bokowski, daniel_megert, darin.eclipse, francisu, hsoliwal, markus.kell.r, ndsilva, pawel.1.piech
Version:	3.4.2
Target Milestone:	3.5.2+
Hardware:	PC
OS:	Windows XP
Whiteboard:
Bug Depends on:	305739, 309407
Bug Blocks:	304277

Description Boris Bokowski

2010-04-15 20:33:53 EDT

+++ This bug was initially created as a clone of Bug #305739 +++

3.4.2 (M20090211-1700)

Calling TreeViewer#expandToLevel(Object, level) when using a tree viewer with a lazy content provider and SWT.VIRTUAL style, causes all children to be retrived via org.eclipse.jface.viewers.ILazyTreePathContentProvider.updateElement(TreePath, int). 

I would expect that expanding an element in the tree would only trigger the retrieval of the visible elements, since the tree is virtual. This is noticeable in the debugger when there is a deep stack (say 400 frames). In this case the debugger calls back to replace each element in the tree (once for each child - 400 times in this case).

See related bug 304277, in debug.

Comment 1 Boris Bokowski

2010-04-15 20:34:25 EDT

Fix needs to be applied to R3_5_maintenance.

Comment 2 Markus Keller

2015-10-28 10:39:28 EDT

Closing outdated bug.