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bug#9873: 24.0.90; dired - window changes size when trying to delete mor


From: martin rudalics
Subject: bug#9873: 24.0.90; dired - window changes size when trying to delete more than one file
Date: Thu, 27 Oct 2011 15:15:39 +0200
User-agent: Thunderbird 2.0.0.21 (Windows/20090302)

>> Its introduction modifies the behavior of splitting, resizing and
>> deleting windows in the order described in the example in the manual.
>
> I understand that it affects resizing (by changing which other window
> is resized as side effect of changing the size of the window we want
> to resize), and deleting (by controlling which window will be given
> the space released by the deleted one).  But what is modified in the
> behavior of splitting?

There's yet another new variable called `window-splits'.  That variable
allows to steal space from other windows when splitting, so you can
"split" windows which are otherwise too small.  Now if `window-nest' is
non-nil, `window-splits' has no effect.

> What I mean is that the user have no way of resizing the internal
> windows, only the live windows, AFAIK.
>
> A Lisp program can resize an internal window, but doing so is
> precisely equivalent to resizing one of the live windows on the same
> frame (again, AFAIK).

No.  Resizing an internal window with two child windows usually resizes
_both_ child windows proportionally (usually so, because edge dragging
behaves different from other forms of resizing).

> When you talk about resizing a live window, I understand exactly what
> is meant.

Then you know more than me.  Resizing a live window can resize all other
windows on the same frame.  Adjusting the edge of a live window can be
different from enlarging that window.  In addition, the nest and splits
status of the window affect the outcome as well.  All I know is that
when I resize a window in a certain way, I can live with the result, or
not.  In the latter case, I try to fix the behavior.  But I gave up
understanding what happens some time ago.

> If by "vertical combination" you mean the internal window
> that is the parent of 2 or more live windows, I can understand that as
> well, assuming that you are talking about a Lisp program.

A vertical combination is slightly more than a parent window.  It
encompasses number and sizes of the parent's child windows too, which
can be retrieved only by looking at these child windows.  Also, a
vertical combination can be the parent of 2 or more internal windows, or
live and internal windows.

>> By resizing their parent window or a sibling of their parent window.  Or
>> by resizing the containing frame.  Or by resizing the minibuffer window.
>
> Some of these are unavailable to users.

... but maybe hidden in operations available to the user ...

> We were talking about a user
> option.

... which is hard to explain, I know.

martin





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