GNU bug report logs - #54905
Allow in tabulated lists to resize columns with the mouse

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: laszlomail <at> protonmail.com, 54905 <at> debbugs.gnu.org
Subject: bug#54905: Allow in tabulated lists to resize columns with the mouse
Date: Thu, 14 Apr 2022 20:15:04 +0300

> From: Lars Ingebrigtsen <larsi <at> gnus.org>
> Cc: laszlomail <at> protonmail.com,  54905 <at> debbugs.gnu.org
> Date: Thu, 14 Apr 2022 18:29:32 +0200
> 
> Yes, this doesn't seem to work:
> 
> (keymap-local-set "<header-line> <drag-mouse-1>" #'foo)
> (defun foo (e)
>   (interactive "e")
>   (message "Hello %S %S"
> 	   (posn-x-y (event-start e)) (posn-x-y (event-end e))))
> 
> Dragging something in the header line does not call this function.

That's because we intervene, AFAICT.  Type "C-h c", then drag the
mouse on the header-line, and see what Emacs tells you about that.

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