Emacs text cursor position

Emacs text cursor position

[AM]

I'm trying to customize Emacs to my needs/wants and so far so good.
The only snag I encountered is in the position of the cursor. I want
to be able to to scroll the  buffer with mouse wheel or on the scroll
bars and have the cursor remain on the original line, even if the
cursor moves off-screen. Then when I start typing, emacs does C-l to
center back on the cursor, if the cursor is off-screen.

Is it possible to customize Emacs in this way? How can I set "mouse
scroll" not to affect the position of the cursor?

Thanks,
Adam

Re: Emacs text cursor position

[Eli Zaretskii]

> From: ummajera@yahoo.ca (AM)
> Date: 22 Jan 2005 19:05:15 -0800
> 
> Is it possible to customize Emacs in this way? How can I set "mouse
> scroll" not to affect the position of the cursor?

Not easily, perhaps not at all.  Emacs's display engine was designed
with the explicit requirement that the cursor (which shows the
position of point, the place where characters you type are inserted)
is always visible.

Re: Emacs text cursor position

[David Hansen]

On 22 Jan 2005 19:05:15 -0800 AM wrote:

> Is it possible to customize Emacs in this way? How can I set "mouse
> scroll" not to affect the position of the cursor?

I don't think so.  You may like (info "(emacs)Mark Ring") for
quick saving of positions within a buffer.

I often use `clone-indirect-buffer' when i have to edit/view two
parts of the same file.

David

Re: Emacs text cursor position

[Thien-Thi Nguyen]

ummajera@yahoo.ca (AM) writes:

> How can I set "mouse
> scroll" not to affect the position of the cursor?

probably you can remember the point on first
mouse scroll event and jump to it later.  you
can hide display of the cursor during scrolling.

rough sketch:
- advise scrolling commands to save point
  unless last-command is a scrolling command
- advise scrolling commands to hide cursor
- advise all other commands (or maybe just C-l)
  to show the cursor
- advise C-l to jump to the saved point
- make all this advising into a minor mode

feel free to post code when you find/write it!

thi

Re: Emacs text cursor position

[Cristian Gutierrez]

Este domingo, ummajera@yahoo.ca dijo:
> I'm trying to customize Emacs to my needs/wants and so far so good.
> The only snag I encountered is in the position of the cursor. I want
> to be able to to scroll the  buffer with mouse wheel or on the scroll
> bars and have the cursor remain on the original line, even if the
> cursor moves off-screen. Then when I start typing, emacs does C-l to
> center back on the cursor, if the cursor is off-screen.
>
> Is it possible to customize Emacs in this way? How can I set "mouse
> scroll" not to affect the position of the cursor?

Not exactly what you're asking (dunno about the mouse wheel), but I use
this hack to scroll text without getting the cursor off the center of
the screen:

,----
| ;; "smooth" scroll
| (defun guti-scroll-up (cuenta)
|   (interactive "p")
|   (move-to-window-line nil)
|   (scroll-up cuenta)
|   (forward-line cuenta)
|   )
| 
| (defun guti-scroll-down (cuenta)
|   (interactive "p")
|   (move-to-window-line nil)
|   (scroll-down cuenta)
|   (forward-line (* -1 cuenta))
|   )
| 
| (global-set-key (kbd "C-<") 'guti-scroll-down)
| (global-set-key (kbd "C->") 'guti-scroll-up)
`----

HTH,

-- 
Cristian Gutierrez			http://www.dcc.uchile.cl/~crgutier
crgutier[@]dcc.uchile.cl                        Jabber:crgutier@jabber.org

"If builders built buildings the way programmers write programs, then
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