Re: drag events should be defined as a movement to a different buffer position (Bug 9186)

["Jan Djärv" <jan.h.d@swipnet.se>]

Can you drag-copy one character with your change?

	Jan D.

Andrew Schein skrev 2011-08-19 19:48:
> https://lists.gnu.org/archive/html/bug-gnu-emacs/2011-08/msg00405.html
>
> Back in 2001, the following revision defined the behavior of mouse
> movements to cause a drag-copy to occur even when the position within
> a buffer does not change:
>
> revno: 40721
> committer: Richard M. Stallman<rms@gnu.org>
> timestamp: Mon 2001-11-05 04:19:56 +0000
> message:
>    (read_char): Use Fcar and Fcdr, not Fnth.
>    (record_char): Likewise.
>
>    (make_lispy_event): Don't insist a drag event must move to a different
>    buffer position.  Instead, check for moving at least double_click_fuzz.
>
> As a result, even clicking on the emacs window is enough to blow away
> a pre-existing drag copy buffer if your hand moves even slightly...
> making the pasting a drag-copy from a separate window a gamble.   This
> is the case if you use your mouse to activate the emacs window instead
> of alt-tab or some other mechanism.  Also, the current emacs behavior
> is contrary to the user experience of other x-based applications such
> as firefox.
>
> Options for fixing this include reverting to a position-based rule or
> else creating an emacs lisp variable that controls this behavior (as
> exists for turning on/off drag copy altogether).  My patch takes the
> former approach.
>
> Cheers,
>
> Andrew
>