Re: how and why does keyboard input unhighlight the mouse-selected region?

[sandipchitale@yahoo.com (Sandip Chitale)]

Kevin Rodgers <ihs_4664@yahoo.com> wrote in message news:<3F58D93F.2000005@yahoo.com>...
> Sandip Chitale wrote:
> 
> > This may be the answer.
> > 
> > deactivate-mark's value is t
> > 
> > Documentation:
> > If an editing command sets this to t, deactivate the mark afterward.
> > The command loop sets this to nil before each command,
> > and tests the value when the command returns.
> > Buffer modification stores t in this variable.
> 
> Yes, but even if I set it to nil with `M-:', select a region with the
> mouse, and type a prefix character (C-h), the highlighting goes away.  I
> can examine its value with `M-:' after selecting the region, which verifies
> that it is still nil.  Merely typing a key causes the the highlighting to
> disappear, even though no command has been executed.

Is the "key" in "typing a key" a buffer modifying key? If not (for
example cursor movement keys) at least for me the region
(highlighting) remains active.