954316 - scrolling conversation content inches upward

Status: RESOLVED WONTFIX

(Instantbird Graveyard :: Conversation, defect)

Description

[Instantbot]

*** Original post on bio 883 by Will Rogers <wjrogers AT gmail.com> at 2011-06-30 16:12:00 UTC ***

New content in the scrolling conversation window initially appears very close to the bottom of the panel. Over a short time, maybe about a minute, it inches upward pixel by pixel until there is a fair amount of space between the content and the input box splitter.

I am using the Bubbles theme, blue and gray alternating, on Instantbird 1.0.

Comment 1

[Patrick Cloke [:clokep]]

*** Original post on bio 883 at 2011-06-30 16:24:07 UTC ***

This was added as part of the Time Bubbles theme, please see http://blog.instantbird.org/a42-introducing-time-bubbles.html for an explanation. I'll leave this open for now though it's not actually a bug.

Comment 2

[Benedikt Pfeifer]

*** Original post on bio 883 at 2011-07-01 07:53:56 UTC ***

(In reply to comment #1)
> This was added as part of the Time Bubbles theme, please see
> http://blog.instantbird.org/a42-introducing-time-bubbles.html for an
> explanation. I'll leave this open for now though it's not actually a bug.

I've tried if we can lessen this effect by using a transition here but it doesn't animate sub-pixel-steps.

Before you think that I'm completely nuts: I wasn't sure if they didn't do something cool for non-integer positions, something antialiasing-like that gives the feeling that the resolution is higher than it actually is by moving a bit of the color of one pixel to the next.

Comment 3

[Florian Quèze [:florian]]

*** Original post on bio 883 at 2011-07-01 08:35:18 UTC ***

(In reply to comment #2)

I believe subpixel anti-aliasing only work horizontally, not vertically.
Moving of non-integer positions may have an effect on the shadow computation and reduce slightly the perceived 1px "jump", but I wouldn't bet on it.

Comment 4

[aleth [:aleth]]

*** Original post on bio 883 at 2012-02-13 19:34:43 UTC ***

(Most RGB monitors have the RGB stripes oriented vertically, so there is indeed no vertical subpixel anti-aliasing on most devices.)

Resolving this as wontfix, please reopen if some subtle smooth scroll timing trick or suchlike shows up... ;)