Re: Scrolling in image-mode

[Tassilo Horn <tassilo@member.fsf.org>]

Angelo Graziosi <angelo.graziosi@alice.it> writes:

>>> > I think the image-scrolling is pretty new, so it depends on the
>>> > emacs version you use.
>>>
>>>
>>> I wrote:
>>>
>>> > Emacs 23.0.50 from CVS less than 3 hours ago and just bootstrapped
>>> >  (on Cygwin)!
>>> >
>>> > ../configure --prefix=${prefix_dir} \
>>> >              --with-x-toolkit=lucid

Ups, sorry. :)

> (pc-selection-mode t)
>
> So the questions now are: Why does enabling pc-selection-mode cause
> the arrow keys do not work in JPEG mode?

,----[ C-h f pc-selection-mode RET ]
| pc-selection-mode is an interactive autoloaded Lisp function in `pc-select'.
| (pc-selection-mode &optional ARG)

[...]

| The arrow keys (and others) are bound to new functions which modify
| the status of the mark.

[...]

| [back]
`----

So with pc-selection-mode -> is not forward-char but
forward-char-nomark, and image mode remaps forward-char to
image-forward-hscroll but does not do the same for forward-char-nomark.

If pc-selection-mode makes the original keys accessible somehow, then
use those for image-scrolling .  (C-h w forward-char RET, or in
image-mode C-h w image-forward-hscroll RET)

> Is it a bug?

Not really.

But you can redefine the image-mode bindings in image-mode-hook like
this:

(add-hook 'image-mode-hook
          (lambda ()
            (local-set-key (kbd "<right>") 'image-forward-hscroll)
            ...
            ))

Bye,
Tassilo