GNU bug report logs - #3468
Support drag and drop of text on MS Windows

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Message #90 received at 3468 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Cecilio Pardo <cpardo <at> imayhem.com>
Cc: 3468 <at> debbugs.gnu.org
Subject: Re: bug#3468: drag and drop text
Date: Thu, 24 Oct 2024 12:40:19 +0300

> Date: Thu, 24 Oct 2024 10:46:12 +0200
> Cc: 3468 <at> debbugs.gnu.org
> From: Cecilio Pardo <cpardo <at> imayhem.com>
> 
> On 24/10/2024 10:16, Eli Zaretskii wrote:
> >> On 24/10/2024 9:37, Eli Zaretskii wrote:
> >>> I guess I'm missing some higher-level understanding of how this work,
> >>> because I don't think I understand why you needed to add a special
> >>> message WM_EMACS_DRAGOVER for this.  Can you explain?
> >>
> >> I could reuse WM_EMACS_DROP, maybe rename to WM_EMACS_DRAGDROP. Added a
> >> new one just for clarity.
> > 
> > I don't mind a new message, I just didn't understand why it was
> > needed.  What is the purpose of WM_EMACS_DROP, and how it differs from
> > this new message?
> 
> We receive the drag or drop information in the functions
> w32_drop_target_Drop and w32_drop_target_DragOver, which run on another 
> thread. We need to notify that to the input thread, sending a message to 
> the window. We use those to custom messages, WM_EMACS_DROP and 
> WM_EMACS_DRAGDROP. One for the drop, the other for when the mouse moves 
> over the window.

Ah, okay, thanks.  So moving point and/or scrolling use different
message from actually dropping the payload?  Makes sense.

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