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ui/cocoa: capture all keys and combos when mouse is grabbed

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Applications such as Gnome may use Alt-Tab and Super-Tab for different
purposes, some use Ctrl-arrows so we want to allow qemu to handle
everything when it captures the mouse/keyboard.

However, Mac OS handles some combos like Command-Tab and Ctrl-arrows
at an earlier part of the event handling chain, not letting qemu see it.

We add a global Event Tap that allows qemu to see all events when the
mouse is grabbed. Note that this requires additional permissions.

See:

https://developer.apple.com/documentation/coregraphics/1454426-cgeventtapcreate?language=objc#discussion
https://support.apple.com/en-in/guide/mac-help/mh32356/mac

Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Gustavo Noronha Silva <gustavo@noronha.dev.br>
Message-Id: <20210713213200.2547-2-gustavo@noronha.dev.br>
Signed-off-by: Akihiko Odaki <akihiko.odaki@gmail.com>
Message-Id: <20220306121119.45631-2-akihiko.odaki@gmail.com>
Reviewed-by: Will Cohen <wwcohen@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
This commit is contained in:
Gustavo Noronha Silva 2022-03-06 21:11:18 +09:00 • committed by Philippe Mathieu-Daudé
parent 69221df8cd
commit f844cdb997
3 changed files with 74 additions and 2 deletions
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3
qemu-options.hx
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@ -1916,6 +1916,9 @@ DEF("display", HAS_ARG, QEMU_OPTION_display,
#if defined(CONFIG_CURSES)
"-display curses[,charset=<encoding>]\n"
#endif
#if defined(CONFIG_COCOA)
"-display cocoa[,full_grab=on|off]\n"
#endif
#if defined(CONFIG_OPENGL)
"-display egl-headless[,rendernode=<file>]\n"
#endif