Binding mouse button sequence to function

Binding mouse button sequence to function

[kitzman]

Hey all,

I want to bind [down-mouse-1 mouse-2] to kill-region. Can one do that? 
Using "global-set-key" results in an error because
mouse buttons are not prefix keys.

Kind regards,
kitzman

Re: Binding mouse button sequence to function

[Stefan Monnier via Users list for the GNU Emacs text editor]

> I want to bind [down-mouse-1 mouse-2] to kill-region.  Can one do that?

Yes.

> Using "global-set-key" results in an error because mouse buttons are
> not prefix keys.

That's just a minor/silly error.  It's just telling you that the
`down-mouse-1` prefix already has a binding in this keymap and the two
are not compatible.
So you can work around it by doing:

    (global-set-key [down-mouse-1] nil)
    (global-set-key [down-mouse-1 mouse-2] <FOO>)

This said, maybe a better approach is to try and change
`mouse-drag-region` so as to kill-region when you hit `mouse-2`.


        Stefan

Re: Binding mouse button sequence to function

[Emanuel Berg]

Stefan Monnier via Users list for the GNU Emacs text editor wrote:

>> Using "global-set-key" results in an error because mouse
>> buttons are not prefix keys.
>
> That's just a minor/silly error. It's just telling you that
> the `down-mouse-1` prefix already has a binding in this
> keymap and the two are not compatible. So you can work
> around it by doing:
>
>     (global-set-key [down-mouse-1] nil)
>     (global-set-key [down-mouse-1 mouse-2] <FOO>)

As you are aware, and I quote the docstring for
`global-set-key',

  This is a legacy function; see ‘keymap-global-set’ for the
  recommended function to use instead.

Maybe that is just a "minor/silly error" as well? :)


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