Re: [Qemu-devel] Booting Raspbian on RPi emulation

[Peter Maydell <peter.maydell@linaro.org>]

On Sun, 27 Jan 2019 at 23:13, BALATON Zoltan <balaton@eik.bme.hu> wrote:
> On Sun, 27 Jan 2019, Peter Maydell wrote:
> > Unfortunately I'm not sufficiently familiar with how OSX
> > event handling works to figure out how to plumb it back in
> > again. It ought to be a fairly simple matter of "implement
> > whatever method OSX sends events to on whatever of our
> > various classes is the right one, and make it call handleEvent
> > with the NSEvent", but I've tried a few things and haven't
> > been able to actually get any event handling methods to
> > fire at all :-(
>
> I think you need to implement keyDown: and keyUp: methods in QemuCocoaView
> to get keyboard events and there are similar methods for mouse events,
> see:
>
> https://developer.apple.com/documentation/appkit/nsview?language=objc

Yeah, I got something working later last night. You also need
to implement acceptsFirstResponder or you don't get any events.
So I have something that at least works for key events in the
monitor window now. I need to check whether we do the right
thing for things like cmd-key hotkeys which need to be handled
by the stock OSX event handling. (In the old scheme we deal with
these by having handleEvent pass them on to sendEvent, but in
the new setup that's an infinite recursion.)

> But these are a lot of methods which are supposedly called from the
> sendEvent: method of the NSWindow containing this view so maybe a better
> place to catch all events is there. For this we need an NSWindow subclass
> implementing sendEvent: which is then used to hold QemuCocoaView. I may be
> wrong though, haven't tested it and don't know what you've tried.

Yeah, we could also do something like that, or another approach
I found by searching around is to use addLocalMonitorForEventsMatchingMask
to catch events. I'd kind of prefer to do whatever is the "expected"
setup for OSX apps, though, and I get the impression that completely
overriding sendEvent is a bit outside the normal path.

thanks
-- PMM