Cursor Moving on Image Broken?

Cursor Moving on Image Broken?

[MJ Chan]

First of all, I apologize if this is not the right mailing list to post
a possible problem with latest CVS Emacs. (I am not on the list). 

I have been running CVS Emacs (dated last December) and everything was
fine with display of image files. I wrote some code that use
'insert-sliced-image' (with multiple rows and columns) to allow me to
easily view a tall/wide image by moving cursor with ^P and ^N. This
works great. 

However, today I checked out latest Emacs from CVS and I found that I
have a problem with ^P (previous line) when the cursor is on the
image. I can do ^N (next-line) without a problem, but ^P will not move
to the previous line. That is, I can only go down and cannot go up. 

Another problem is that when I scroll a wide image to the right (with
my multi-column image display), I no longer can scroll back  to
beginning of the line (an image strip actually) with ^P. 

I looked through the mailing archive, and saw a similar post that
talks about partial image scrolling in January, but I am not sure if
it is related. I also learned that the new move-line lisp function is
also trying to help solve the scrolling of tall image. Would that have
something to do with the problem I reported? Or this is already a
known problem?

Thanks. 

MJ

Re: Cursor Moving on Image Broken?

[Kim F. Storm]

MJ Chan <bichonyoyo@gmail.com> writes:

> First of all, I apologize if this is not the right mailing list to post
> a possible problem with latest CVS Emacs. (I am not on the list). 

You should use M-x report-emacs-bug to report bugs with CVS Emacs.

> However, today I checked out latest Emacs from CVS and I found that I
> have a problem with ^P (previous line) when the cursor is on the
> image. I can do ^N (next-line) without a problem, but ^P will not move
> to the previous line. That is, I can only go down and cannot go up. 
>
> Another problem is that when I scroll a wide image to the right (with
> my multi-column image display), I no longer can scroll back  to
> beginning of the line (an image strip actually) with ^P. 

Can you post a specific test case (lisp code + image + step-by-step
instructions) that shows the bogus behaviour, or at least some more
specific instructions like "size of slices" etc...

>
> I looked through the mailing archive, and saw a similar post that
> talks about partial image scrolling in January, but I am not sure if
> it is related. I also learned that the new move-line lisp function is
> also trying to help solve the scrolling of tall image. Would that have
> something to do with the problem I reported?

It could very well be a problem...  Line scrolling now tries
to scroll correctly in tall images -- but it may have broken
something else.


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