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

[Sandip Chitale]

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.




Kevin Rodgers <ihs_4664@yahoo.com> wrote in message 
news:<3F575F5D.3040600@yahoo.com>...
> If I select the region with the mouse (with transient mark mode
> disabled), it is highlighted using the `region' face.  I think that is
> implemented via `mouse-drag-overlay' in lisp/mouse.el.  Then any
> subsequent keyboard input -- even typing a prefix key like `C-x' --
> causes it to be unhighlighted; `C-h v' shows
> 
> | mouse-drag-overlay's value is
> | #<overlay in no buffer>
> 
> I don't see any references to mouse-drag-overlay in the src/*.c files,
> or anywhere outside of lisp/mouse.el and lisp/mouse-sel.el for that
> matter.  So how is the unhighlighting of the selected region
> implemented?  And why is that the default behavior -- no command has
> been executed, certainly not any command that modifies the buffer or
> alters the region.  Finally, can the unhighlighting be disabled?