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Re: Smooth scrolling


From: Marcelo de Moraes Serpa
Subject: Re: Smooth scrolling
Date: Thu, 8 Jul 2010 10:05:03 -0500

http://zwell.net/content/emacs.html

This is the nearest to what I'd like, seems to work, although has some
small glitches.

Marcelo.

On Thu, Jul 8, 2010 at 3:51 AM, David Engster <address@hidden> wrote:
> Jesse W. Wilson writes:
>> Perhaps the following could be of use?
>> http://www.gnu.org/s/emacs/manual/html_node/elisp/Vertical-Scrolling.html
>>
>> If I type this in a buffer and eval with c-x c-e,
>> (set-window-vscroll (selected-window) 0.3)
>>
>> It seems to scroll a fraction of a line downward.
>>
>> Of course I haven't a clue how it could be incorporated into bindings
>> for the scroll wheel.
>
> Yes, Emacs can do "fractional" (read: pixel-wise) scrolling with the
> set-window-vscroll command you mentioned above. For example,
> picture-mode can smooth-scroll an image just fine. However, there are
> two caveats: it is slow, and the point must remain visible during
> scrolling.
>
> I've fiddled with this stuff a while ago to implement a smoother
> scrolling for buffers with images in them. See
>
> http://www.randomsample.de/dru5/node/25
> http://www.randomsample.de/dru5/node/26
>
> for how far I've come. Those functions use set-window-vscroll to scroll
> the buffer and move point in a way so that it always remains
> visible. However, you'll notice that the higher the vscroll value of the
> current window, the slower scrolling becomes, so it's of limited
> value. Also, it doesn't work well with the other point-moving commands,
> so it's currently only useful for read-only buffers.
>
> Regards,
> David
>
>
>



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