From: Eli Zaretskii <eliz@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: Re: Selection threshold with mouse
Date: Mon, 21 Jul 2014 18:31:14 +0300 [thread overview]
Message-ID: <83ha2a4tkt.fsf@gnu.org> (raw)
In-Reply-To: <jwvsilubxqy.fsf-monnier+gmane.emacs.help@gnu.org>
> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Mon, 21 Jul 2014 10:20:25 -0400
>
> > Because the existing methods are glyph-granular, not pixel-granular.
> > When you tell them to stop at pixel coordinate X, they move one
> > "display element" (e.g., character or image) at a time,
>
> But they need to keep track either of the "current pixel position" (to
> compare against X) or (equivalently) of "remaining pixels until X".
> So they should know the exact pixel position.
Like I said, you cannot rely on that:
else if ((op & MOVE_TO_X) && it->current_x >= to_x)
{ ^^^^
result = MOVE_X_REACHED;
break;
}
IOW, the exact pixel position is not always what you want in the case
in point. All you know it's not _before_ X.
next prev parent reply other threads:[~2014-07-21 15:31 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-19 8:32 Selection threshold with mouse Tak Kunihiro
2014-07-19 17:31 ` Drew Adams
2014-07-19 23:52 ` Tak Kunihiro
2014-07-20 1:22 ` Stefan Monnier
2014-07-20 4:23 ` Eli Zaretskii
[not found] ` <mailman.5728.1405830249.1147.help-gnu-emacs@gnu.org>
2014-07-20 14:37 ` Stefan Monnier
2014-07-20 15:04 ` Eli Zaretskii
[not found] ` <mailman.5763.1405868682.1147.help-gnu-emacs@gnu.org>
2014-07-20 15:37 ` Stefan Monnier
2014-07-20 16:24 ` Eli Zaretskii
[not found] ` <mailman.5768.1405873481.1147.help-gnu-emacs@gnu.org>
2014-07-20 16:44 ` Stefan Monnier
2014-07-20 17:21 ` Eli Zaretskii
2014-07-21 14:20 ` Stefan Monnier
2014-07-21 15:31 ` Eli Zaretskii [this message]
2014-07-23 0:27 ` Tak Kunihiro
2014-07-25 8:41 ` Eli Zaretskii
2014-07-20 1:26 ` Michael Heerdegen
[not found] ` <mailman.5704.1405791121.1147.help-gnu-emacs@gnu.org>
2014-07-19 18:26 ` Barry Margolin
2014-07-19 18:47 ` Eli Zaretskii
[not found] ` <<837g395gp2.fsf@gnu.org>
2014-07-19 19:41 ` Drew Adams
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