From: dalanicolai <dalanicolai@gmail.com>
To: Emacs Devel <emacs-devel@gnu.org>
Subject: Question about weird vscroll behavior
Date: Sun, 5 Nov 2023 16:49:04 +0100 [thread overview]
Message-ID: <CACJP=3nLKsk6mLZ-GWDKEiJA6C4g_30Zrj453i_QQ5gM+bp7Fw@mail.gmail.com> (raw)
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Hi,
I am experiencing some weird behavior. I am simply trying to set the
vscroll. For that I first created a single overlay displaying a large
space and then use set-window-vscroll to set the vscroll.
It works when I simply load my Emacs configuration, but for some
reason it does not work when I start from emacs -Q.
Although I guess vscroll should be working on lines smaller than the
screen, just for testing I now display 3 'spaces' and then try to set
vscroll as follows:
(progn
> (pop-to-buffer "example")
> (dotimes (i 3)
> (let ((o (make-overlay (point)
> (progn (insert " ")
> (point)))))
> (insert "\n")
> (overlay-put o 'display `(space . (:width (600) :height (800))))
> (overlay-put o 'face (list :background (pcase (% i 3)
> (0 "red")
> (1 "green")
> (2 "blue"))))))
> (goto-char (point-min))
>
> (set-window-vscroll nil 300 t))
>
I have tested it on Emacs 29.1 and 28.3.
I wonder if this is a bug, or if I am missing something. Could you
please evaluate the above code starting from emacs -Q, and confirm
this is a bug (or tell me what I am missing)?
Thanks
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next reply other threads:[~2023-11-05 15:49 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-05 15:49 dalanicolai [this message]
2023-11-05 16:20 ` Question about weird vscroll behavior Eli Zaretskii
2023-11-05 16:36 ` dalanicolai
2023-11-05 17:01 ` Eli Zaretskii
2023-11-05 18:14 ` dalanicolai
2023-11-05 20:17 ` dalanicolai
2023-11-10 18:51 ` dalanicolai
2023-11-10 19:49 ` Eli Zaretskii
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