Re: Displaying scrollable images in a grid-layout

[Eli Zaretskii <eliz@gnu.org>]

> From: Yuri Khan <yuri.v.khan@gmail.com>
> Date: Wed, 15 Apr 2015 23:02:00 +0600
> Cc: Tassilo Horn <tsdh@gnu.org>, politza@hochschule-trier.de, 
> 	Emacs developers <emacs-devel@gnu.org>
> 
> On Wed, Apr 15, 2015 at 10:47 PM, Eli Zaretskii <eliz@gnu.org> wrote:
> 
> >> However, I believe the threshold where pixel-based scrolling and
> >> glyph-row-based scrolling meet should be when at least two full glyph
> >> rows fit in a window; this way, after the scroll, the previous row is
> >> still visible, providing some continuity.
> >
> > If you really meant "at least", then this means no threshold at all,
> > because obviously we have to, and already do, provide pixel-based
> > scrolling when a glyph row does NOT fit in the window.  Right?
> 
> When a glyph row does not fit in the window: pixel-based scrolling.
> 
> When between one and two glyph rows fit: pixel-based scrolling,
> because otherwise the previous row would disappear without a visual
> indication where it went.
> 
> When more than two full glyph rows fit, that’s where row-based
> scrolling stops being disorienting for me.

I guess I misunderstood what you meant by "meet".  Sorry about that.

Anyway, where they meet is definitely a matter of taste.  I see no
problem with scrolling the previous row completely out of view,
because it was fully visible before the scroll.