Re: [Qemu-devel] Cocoa Video Driver & mouse grabbing

[Mike Kronenberg <mike.kronenberg@kberg.ch>]

René Korthaus wrote:

> I know.

I knew - I'm following the list for quite some time :)  - It was rather 
retorical to see whether I was worng, since I still have to crawl a lot 
of code.

>> In order to be able to use elements outside qemu (like for examples a 
>> toolbar with a button to switch cdrom-images) you must have a way to 
>> ungrab on the fly. I use the same ctrl+alt as in SDL.
>
>
> Why do you have to use grabbing anyway? Its as simple as when the 
> mouse moves over the Qemu window, the cursor in the guest os moves, 
> isn't it? VPC doesn't need grabbing, too, right? I think no grabbing 
> is more user-friendly.

That is exactly the point. To achive that, both system would have to use 
the same cursor speed/acceleration. One way is to disable acceleration 
in the guest-OS.
Further, the guest-OS would have to know, where I enter the window - as 
far as i know, the guest-OS only reads the mouse-delta. One way would be 
to "calibrate" the guest-OS cursor.
Possibility: Send a (-10000,-10000) mouse-delta to qemu - guessing that 
the cursor is now at (0/0) in the guest, then compute the mouse-delta to 
the window-entrypoint.

Writing this, I realise I have to try that. Thanks for the input :)
(Still under the assumption the guest has cursor-acceleration turned of)

>> Never the less, one could make an Menu- / Prefferencepanel entry for 
>> enabling/disabling mousegrab for Console-Style Guest-OSes
>
>
> Then, that would require a command-line argument like -nograb for 
> disabling mouse grabbing for the current session, which would be the 
> approach I would favour personally and also for the users of a GUI, 
> cause it would only mean to be a checkbox in the preferences.

Well, I think the "Vanilla OS X user" does not care about command-line 
options :) . If the SDL part would have a similar option, it would be ok 
to use that, but as long as only the "small" cocoa world would need it, 
i would stay with a checkbox in the preferences - which could be handled 
by cocoa.m without cmdline option.

> We could probably start a poll about that... :)
> BTW: I renamed the subject to meet the discussion point.

No doubt :)

I rl I write programs for education - target users are children 7-14 and 
teachers - the keyword is: keep it REAL simple. I think both ways are 
needed, the commandline way for us, the guiway for them :)

Mike