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In-Reply-To: <20080814122628.GA4804@shareable.org>
Subject: Re: [Qemu-devel] [PATCH] [RFC] usb-wacom
From: "=?windows-1252?q?Fran=E7ois?= Revol" <revol@free.fr>
Date: Thu, 14 Aug 2008 14:44:28 +0200 CEST
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To: qemu-devel@nongnu.org

> Fran=E7ois Revol wrote:
> > > > First, mouse stayed in the top-left corner... Seems coords were 
> > > > set
> > > > to
> > > > 0,0 when no button is pressed, which is wrong, most tablets
> > > > actually
> > > > sense the stylus even when it's not yet touching the surface.
> > >
> > > I see similar problems with Windows Server 2003 guest and the USB
> > > tablet emulation.  The pointer jumps about randomly, so it's not
> > > usable.  It works fine with Windows XP guest.
> > 
> > XP likely disregards mouse up packets and caches the last position.
> 
> Would caching the last position cause the mouse to jump all over the
> screen from frame to frame (no intermediate motion) as if it's 
> reading
> random absolute coordinates=3F

Well not random, it would just stay on the same position until next 
touch, just like with touch screens.

Fran=E7ois.