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Bug 162090

Summary:	ScrollBarLayout hides thumb figure too soon
Product:	[Tools] GEF	Reporter:	Randy Hudson <hudsonr>
Component:	GEF-Legacy Draw2d	Assignee:	gef-inbox <gef-inbox>
Status:	RESOLVED WORKSFORME	QA Contact:
Severity:	normal
Priority:	P3	CC:	nyssen
Version:	unspecified
Target Milestone:	---
Hardware:	PC
OS:	Windows XP
Whiteboard:

Description Randy Hudson

2006-10-24 11:00:12 EDT

ScrollBarLayout positions thumb figure inside the "track" area.
The thumb should be visible any time the avialable space is >= to the thumb's minimum size. The current condition incorrectly tests for >.

The result is that the Scrollbar has a void in the middle at certain small sizes. This void is where the visible thumb should be placed.

On another note, I have not tested what happens when the scrollbar gets even smaller than required to show the thumb. To avoid it still having a hole its middle, it should position the pagedown and possible pageup figures in the track area.

Comment 1 Alexander Nyßen

2014-08-09 05:11:46 EDT

Changing this condition has a very slight effect, as the void will still appear in case the available space is smaller than the thumb's minimum size. If we change the condition as outlined here, the thumb will be "unmovable" in case its minimum size fits exactly the available track area, which does IMHO not feel as natural as the current behavior. If clients want to tweak the behavior, they can overwrite ScrollBarLayout. As such, resolving this as WORKSFORME.