Re: [Qemu-devel] rfb patch and mouse movement

[Brad Campbell]

Jim C. Brown wrote:

> > It worked by taking the data from the touchscreen, running it through the 
> > relevant calibration routines and sending windows absolute mouse movement 
> > messages. It worked rather well.
>
>
> What "relevant calibration routines" are we looking at here?

Pretty simple linear scaling and axis inversion for touchscreens. Nothing complex. Just calculate 
the max/min points based on some calibration, scale them up to 16 bit values and feed them to 
windows using a mouse movement message.

> > Perhaps we could use the touchscreen for movement only 
> > and send clicks over the ps2 interface.
>
>
> That would require an ugly custom guest driver.

Not really. Touchscreen drivers and mouse drives co-exist. Just send the movement down the touch 
screen line and the clicks down the PS2 line. Simple.

> > Just a wildly meandering thought as I struggle to make this session of qemu 
> > with vnc workable with Windows XP.
>
>
> Does pressing Ctrl-Alt (or Ctrl-Shift??) to ungrab the mouse, then realiging
> the host and guest pointers, and then regrabing the mouse work? This is what I
> do w/ my no-sdl patch.

I'm using VNC only, so there is no grab/un-grab.

Now I at least I have it working so it's not such an issue, but it is annoying. I'll think about it 
a bit more as it's getting serious daily use now.

Regards,
Brad