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Re: [Qemu-devel] Doing a Tcl/Tk based frontend

From: Oliver Gerlich
Subject: Re: [Qemu-devel] Doing a Tcl/Tk based frontend
Date: Fri, 16 Jun 2006 01:33:26 +0200
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Daniel P. Berrange schrieb:
> On Thu, Jun 15, 2006 at 05:52:14PM -0500, John Morris wrote:
>>On Thu, 2006-06-15 at 17:29, Oliver Gerlich wrote:
>>>If you are familiar with Tcl/Tk, maybe you could give some hints on how
>>>to embed the Qemu window into such an app?
>>Embedding the emulator's window might not be the best way to attack the
>>problem.  Especially since you would need to be able to detach it to be
>>able to go full screen.  I have pondered the Tk frontend idea before so
>>lemme dump my random thoughts on the subject and see how many holes get
>>punched in em.
> With the new VNC server capability there is no need to embed the emulator's
> existing window. You can just have a GTK/QT widget which acts as a VNC client
> taking the video feed & displaying directly within the GUI management app. 
> Similarly you can redirect the QEMU monitor console to a UNIX pipe when 
> lauching QEMU, so the management app can fully control the QEMU engine
> to do suspend/resume, snapshots, media changesi.
> I wrote an GUI app in Python which did the latter already:
> http://people.redhat.com/berrange/olpc/sdk/olpc-qemu-admin-demo.html
> At the time I wrote it there wasn't any VNC support in QEMU, so I couldn't
> hook up the display, but with the 0.8.1 release it wouldn't be much effort
> to embed the display directly in the app via VNC. So I don't think there 
> are any changes required in QEMU itself to be able to create a fully
> featured QEMU frontend easily on a par with VMWare Desktop, if not better.
> Regards.
> Dan.

VNC is a good idea... But isn't it a bit "laggy" for this purpose? I
think people accept a laggy mouse cursor in a VNC window that comes over
the network, but won't really accept that in virtual machine that's
running directly on their desktop. OTOH, I'm no VNC expert :) and maybe
there are tricks to speed this up?!

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