Bug 267355

Summary:	Drag and drop: Tree does not update vertical scrollbar when auto-scrolling
Product:	[Eclipse Project] Platform	Reporter:	Markus Keller <markus.kell.r>
Component:	SWT	Assignee:	Felipe Heidrich <eclipse.felipe>
Status:	NEW ---	QA Contact:
Severity:	minor
Priority:	P3	CC:	eclipse.felipe, h1055071, steve_northover
Version:	3.5
Target Milestone:	---
Hardware:	PC
OS:	Windows XP
Whiteboard:

Description Markus Keller

2009-03-06 08:25:50 EST

I20090304-0834

- launch DNDExample
- on the right side, select Tree and FEEDBACK_SCROLL
- expand some tree items such that vertical scrollbar appears
- drag something over the bottom of the tree
=> tree scrolls, but vertical scrollbar is not updated (only after I release the mouse). Works fine for a table or when a tree item is auto-expanded.

Comment 1 Felipe Heidrich

2009-03-09 13:26:59 EDT

Steve, this only happens on Trees with columns.
We can fix it by hiding and showing the scrollbar:

OS.ShowScrollBar (hwndParent, OS.SB_VERT, false);
OS.ShowScrollBar (hwndParent, OS.SB_VERT, true);

That works by causes flashing.

Do know of any other say to force the scrollbar to draw without side effects ?

(note, the code is wrong, it first needs to test if the scrollbar is visible before doing anything.)

Comment 2 Steve Northover

2009-03-09 14:12:06 EDT

Please investigate Tree.showItem().

Comment 3 Felipe Heidrich

2009-03-09 14:34:56 EDT

(In reply to comment #2)
> Please investigate Tree.showItem().

It causes cheese

Comment 4 Steve Northover

2009-03-09 15:10:35 EDT

Then we have a bug.

Comment 5 Felipe Heidrich

2009-07-28 09:23:22 EDT

*** Bug 284840 has been marked as a duplicate of this bug. ***

Comment 6 Eclipse Webmaster

2019-09-06 16:05:31 EDT

This bug hasn't had any activity in quite some time. Maybe the problem got resolved, was a duplicate of something else, or became less pressing for some reason - or maybe it's still relevant but just hasn't been looked at yet.

If you have further information on the current state of the bug, please add it. The information can be, for example, that the problem still occurs, that you still want the feature, that more information is needed, or that the bug is (for whatever reason) no longer relevant.