309406 – [Viewers] [viewers] #expandToLevel(Object, level) retrieves all children when virtual

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Bug 309406 - [Viewers] [viewers] #expandToLevel(Object, level) retrieves all children when virtual

Summary: [Viewers] [viewers] #expandToLevel(Object, level) retrieves all children when...

Status:	RESOLVED WONTFIX

Alias:	None

Product:	Platform
Classification:	Eclipse Project
Component:	UI (show other bugs)
Version:	3.4.2
Hardware:	PC Windows XP

Importance:	P3 normal with 1 vote (vote)
Target Milestone:	3.5.2+
Assignee:	Platform UI Triaged
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Depends on:	305739 309407
Blocks:	304277
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Reported:	2010-04-15 20:33 EDT by Boris Bokowski
Modified:	2015-10-28 10:39 EDT (History)
CC List:	8 users (show)

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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Closing outdated bug.