bug#74641: When scrolling on non-selected window, this window does not change to selected.

bug#74641: When scrolling on non-selected window, this window does not change to selected.

[soliidne]

Hi !

Assume, one frame and it is split into two window. When scrolling on non-selected window, this window does not change to selected.

If these two windows contain same buffer and when scrolling on non-selected window, the individual scroll events go through to selected window, because buffer makes a few jumps there. The non-selected window remain non-selected.

Tested with: 

pixel-scroll-precision-mode enabled
pixel-scroll-mode disabled
mouse-wheel-mode enabled/disabled

emacs 29.4
archlinux
xfwm4 4.18.0-4

bug#74641: When scrolling on non-selected window, this window does not change to selected.

[Sean Whitton]

Hello,

This is a feature, not a bug, I think.

You might want to look at the setting mouse-autoselect-window.

--
Sean Whitton

Please excuse top-posting and brevity. I am writing to you from a mobile phone.

> On 2 Dec 2024, at 12:40, soliidne@gmail.com wrote:
> 
> Hi !
> 
> Assume, one frame and it is split into two window. When scrolling on non-selected window, this window does not change to selected.
> 
> If these two windows contain same buffer and when scrolling on non-selected window, the individual scroll events go through to selected window, because buffer makes a few jumps there. The non-selected window remain non-selected.
> 
> Tested with:
> 
> pixel-scroll-precision-mode enabled
> pixel-scroll-mode disabled
> mouse-wheel-mode enabled/disabled
> 
> emacs 29.4
> archlinux
> xfwm4 4.18.0-4

bug#74641: When scrolling on non-selected window, this window does not change to selected.

[Eli Zaretskii]

> Date: Mon, 2 Dec 2024 03:00:46 +0200
> From: <soliidne@gmail.com>
> 
> Hi !
> 
> Assume, one frame and it is split into two window. When scrolling on non-selected window, this window does not change to selected.
> 
> If these two windows contain same buffer and when scrolling on non-selected window, the individual scroll events go through to selected window, because buffer makes a few jumps there. The non-selected window remain non-selected.
> 
> Tested with: 
> 
> pixel-scroll-precision-mode enabled
> pixel-scroll-mode disabled
> mouse-wheel-mode enabled/disabled
> 
> emacs 29.4
> archlinux
> xfwm4 4.18.0-4

Please show a recipe, preferably starting from "emacs -Q", to
reproduce the issue.  Because just by doing what I think you did, I
cannot reproduce this: I can scroll a non-selected window without
affecting the selected window which shows the same buffer.  What am I
missing?

bug#74641: When scrolling on non-selected window, this window does not change to selected.

[Eli Zaretskii]

[Please use Reply All to reply, so that the bug tracker is CC'ed.]

> Date: Mon, 2 Dec 2024 15:51:12 +0200
> From: <soliidne@gmail.com>
> 
> 1. 
> If you scroll a upper non-selected window of same buffer, will the upper widow become selected ? 

No.  And it shouldn't.

> My position is that if non-selected window gets scroll event, the same window should become selected. Same way, as a mouse-1 click on a non-selected window makes that same window selected.

In that case, what Sean wrote is true: it's a feature, not a bug.
Emacs lets you scroll a window without making it the selected one.

> When you scroll upper non-selected window, the bottom selected window still "steals" some individual scroll events. Thus, scrolling in a non-selected window also affects another selected window of the same frame.

This I cannot reproduce.  If you have a recipe for reproducing this in
"emacs -Q", please show the steps to reproduce.