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Bug 120089

Summary:	[rulers] Visual lag of line number ruler when scrolling
Product:	[Eclipse Project] JDT	Reporter:	Tobias Widmer <tobias_widmer>
Component:	Text	Assignee:	Tom Hofmann <eclipse>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	P3	CC:	daniel_megert, dirk_baeumer
Version:	3.2
Target Milestone:	3.2 M4
Hardware:	PC
OS:	All
Whiteboard:

Description Tobias Widmer

2005-12-09 05:33:04 EST

I20051206-1200

Steps to reproduce:
- Using WinXP, Java editor font set to system default (Tahoma, 9, regular)
- Enable line number ruler
- Scroll Java editor

-> Line number ruler seems badly synchronized with the scrolled lines
-> After some scrolling, the line numbers are displayed with some offset from the actual line
-> Seems to occur with variable space fonts only

Comment 1 Tobias Widmer

2005-12-09 05:42:56 EST

This happens regardless whether folding is enabled or not, or any elements are collapsed.
Strange enough, the defect manifests itself only in small Java files with small scrolling range, such as "RefactoringResourceMapping". Bigger files such as "JavaCore" do not exhibit this behavior.

Comment 2 Tom Hofmann

2005-12-09 05:52:15 EST

Also on GTK.

Comment 3 Dani Megert

2005-12-09 06:11:20 EST

Dirk sees this too, using Courier New 10 and XP style SWT.

Comment 4 Tom Hofmann

2005-12-09 12:32:09 EST

fixed > 20051209 in MigrationHelper::getPartialHiddentLines