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Date: Fri, 14 Jan 2011 10:48:50 +0000
From: "Daniel P. Berrange" <berrange@redhat.com>
Subject: Re: [Qemu-devel] Re: [Spice-devel] paravirtual mouse/tablet
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To: Gerd Hoffmann <kraxel@redhat.com>
Cc: Stefan Hajnoczi <stefanha@gmail.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, spice-devel <spice-devel@lists.freedesktop.org>

On Fri, Jan 14, 2011 at 09:49:40AM +0100, Gerd Hoffmann wrote:
> >>>That maybe implies that we need an offscreen coordinate for the
> >>>mouse so that you can hide the mouse when it leaves one window.
> >>
> >>Hmm? I fail to see why multihead is special here.
> >
> >If you show two mice in the guest, would X render two cursors?
> 
> With two mice you still have just one cursor.  Just plug a usb mouse
> into your laptop, you can move the single pointer with both usb
> mouse and touchpad then.  Didn't try what happens with two tablets,
> but I expect it wouldn't be different ...

NB having all mice bound to one cursor is merely the historical
default behaviour. IIUC the recent "Multi-Pointer X" feature
lets you now have multiple cursors, one per pointing device.

https://secure.wikimedia.org/wikipedia/en/wiki/Multi-Pointer_X

Regards,
Daniel