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Re: New Context Menu and mouse-1

From: Juri Linkov
Subject: Re: New Context Menu and mouse-1
Date: Fri, 27 Aug 2021 09:21:21 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (x86_64-pc-linux-gnu)

Other apps support the following optimal mouse gesture:

1. Press down-mouse-1 and move the mouse to select the region;
2. Without releasing mouse-1, click mouse-3 to pop up the context menu;
3. Release mouse-1 on the menu item "Cut", thus deleting the region.

This allows selecting and deleting the region with just 2 mouse clicks.
The same works almost perfectly in Emacs with a single snag:
while dragging mouse-1, visually it looks like the region is selected,
but really the region don't get selected until mouse-1 is released
and calls 'mouse-set-region' bound to [drag-mouse-1].

But while using the above gesture, [drag-mouse-1] (mouse-set-region) is
never invoked:

 <down-mouse-1>             ;; mouse-drag-region
 <mouse-movement>           ;; anonymous-command
 <mouse-movement>           ;; anonymous-command
 <mouse-movement>           ;; anonymous-command
 <down-mouse-3> <cut>       ;; kill-region

I have no idea how this could be fixed.

Maybe mouse--drag-set-mark-and-point should set the real region when
called from lambda bound to [mouse-movement] by set-transient-map in

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