Re: Scrolling in image-mode

Re: Scrolling in image-mode

[Angelo Graziosi]

Tassilo Horn wrote:

 > 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

Now I have just bootstrapped current Emacs 23.0.50 CVS on GNU/Linux
Kubuntu 7.10.

I have also used Emacs 22.1 (built with GTK) that is installed on that
version of GNU/Linux.


In all the above cases the scrolling with the four arrow keys does not
work!

As a test imgage I have used this:

http://www.webalice.it/angelo.graziosi/rosa-1.jpg


Cheers,
    Angelo.

---
http://www.webalice.it/angelo.graziosi



Facesti come quei che va di notte,
che porta il lume dietro e se' non giova,
ma dopo se' fa le persone dotte.
---
                   DANTE, Purgatorio, xxii 67-69

Re: Scrolling in image-mode

[Vinicius Jose Latorre]

Angelo Graziosi wrote:
> Tassilo Horn wrote:
>
> > 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
>
> Now I have just bootstrapped current Emacs 23.0.50 CVS on GNU/Linux
> Kubuntu 7.10.
>
> I have also used Emacs 22.1 (built with GTK) that is installed on that
> version of GNU/Linux.
>
>
> In all the above cases the scrolling with the four arrow keys does not
> work!
>
> As a test imgage I have used this:
>
> http://www.webalice.it/angelo.graziosi/rosa-1.jpg


I've just downloaded rosa-1.jpg.

Using "emacs -Q rosa-1.jpg", the four arrow keys work for me.

Re: Scrolling in image-mode

[Angelo Graziosi]

Vinicius Jose Latorre wrote:
> Angelo Graziosi wrote:
>> Tassilo Horn wrote:
>>
>> > 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
>>
>> Now I have just bootstrapped current Emacs 23.0.50 CVS on GNU/Linux
>> Kubuntu 7.10.
>>
>> I have also used Emacs 22.1 (built with GTK) that is installed on that
>> version of GNU/Linux.
>>
>>
>> In all the above cases the scrolling with the four arrow keys does not
>> work!
>>
>> As a test imgage I have used this:
>>
>> http://www.webalice.it/angelo.graziosi/rosa-1.jpg
> 
> 
> I've just downloaded rosa-1.jpg.
> 
> Using "emacs -Q rosa-1.jpg", the four arrow keys work for me.
> 

Well, it seems that the cause of the problem is this in my .emacs file:

(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?

Is it a bug?

On the list, there is a thread regarding pc-select.el 
(http://lists.gnu.org/archive/html/emacs-devel/2008-01/msg00490.html).

Could it interfere, in some manner, with our discussion?

Cheers,
    Angelo.

---
http://www.webalice.it/angelo.graziosi



Tu proverai si' come sa di sale
lo pane altrui, e come e' duro calle
lo scendere e 'l salir per l'altrui scale.
---
                   DANTE, Paradiso, xvii 58-60

Re: Scrolling in image-mode

[Tassilo Horn]

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

Re: Scrolling in image-mode

[Kim F. Storm]

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

> So the questions now are: Why does enabling pc-selection-mode cause
> the arrow keys do not work in JPEG mode?
>
Because it rebinds those keys.

You may try cua-mode instead.

It provides the same (and more) features as pc-selection-mode
without rebinding the arrow keys.

-- 
Kim F. Storm <storm@cua.dk> http://www.cua.dk

Re: Scrolling in image-mode

[Angelo Graziosi]

Kim F. Storm wrote:

> 
> You may try cua-mode instead.
> 
> It provides the same (and more) features as pc-selection-mode
> without rebinding the arrow keys.
> 

Tassilo Horn wrote:

 > 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)
 >            ...
 >            ))

Many thanks for all these suggestions.

I have commented out the pc-selection-mode in .emacs (perhaps it was 
there because adopted with a previous version of Emacs).

A little suggestion/request: When cua-mode is enabled, it would be nice 
to see some items in Edit menu redefined,

Cut    C-x       instead of       Cut    (<cut>)

etc...


Thanks a lot,
    Angelo.

---
http://www.webalice.it/angelo.graziosi



Facesti come quei che va di notte,
che porta il lume dietro e se' non giova,
ma dopo se' fa le persone dotte.
---
                   DANTE, Purgatorio, xxii 67-69

Re: Scrolling in image-mode

[Stefan Monnier]

> Well, it seems that the cause of the problem is this in my .emacs file:
> (pc-selection-mode t)

I guess image-mode should explicitly bind left/right/up/down rather than
limit itself to remapping commands like forward-char, ...


        Stefan

Re: Scrolling in image-mode

[Angelo Graziosi]

Tassilo Horn wrote:

 > I think the image-scrolling is pretty new, so it depends on the emacs
 > version you use.

Emacs 23.0.50 from CVS less than 3 hours ago and just bootstrapped (on 
Cygwin)!

../configure --prefix=${prefix_dir} \
              --with-x-toolkit=lucid


Cheers,
    Angelo.

---
http://www.webalice.it/angelo.graziosi


Facesti come quei che va di notte,
che porta il lume dietro e se' non giova,
ma dopo se' fa le persone dotte.
---
                   DANTE, Purgatorio, xxii 67-69