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Re: Mouse wheel

From: Stefan Monnier
Subject: Re: Mouse wheel
Date: Wed, 04 Jun 2003 17:04:33 -0400

> > We can then remove the (mouse-wheel-mode 1) call in w32-win.el and
> > in x-win.el we need to add:
> > 
> > (define-key function-key-map [mouse-4]              [wheel-up])
> > (define-key function-key-map [mouse-5]              [wheel-down])
> > (define-key function-key-map [C-mouse-4]    [C-wheel-up])
> > (define-key function-key-map [C-mouse-5]    [C-wheel-down])
> > ...
> > 
> > and related friends (ideally we should be able to do this mapping
> > automatically by querying the X server, but it seems difficult/impossible,
> > so for now we'll just use function-key-map).  Of course, a bit more work
> > than the above is needed, but I'm just trying to see if we all agree
> > this is the way to go.
> Probably. I'm not sure what X users with >3 button mice + wheel do
> with their ZAxisMapping.  There are probably enough apps that are
> hardwired to use mouse-4 and mouse-5 as the wheel, to force such users
> to go to the trouble of mapping buttons 4 and 5 to 6 and 7 so they can
> leave 4 and 5 free for the wheel.

That's already the case right now anyway.  They can play around with
Emacs bindings if they prefer: the above define-key statements
shouldn't get in their way as far as I can tell.

> I thought there was a way of handling z-axis events in X directly
> without the mapping, but after searching now I think I might have
> been misled by GDK or vi documentation (both of which basically do the
> above function-key-mapping).

Indeed, it seems pretty difficult to robustly get the Z-axis events.


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