It seems that "peeking" from the event queue does not yield events in case of changing resolutions:

``` NSApp nextEventMatchingMask:NSEventMaskAny untilDate:nil inMode:NSEventTrackingRunLoopMode dequeue: ***NO*** ```

And then it never enters the loop...

Of course, apple's doc says nothing about this: https://developer.apple.com/documentation/appkit/nsapplication/1428485-nexte... So all this is speculation ^^.

This new version consumes all pending events in the NSApp, and it does not show any lockups when e.g., switching resolutions. If the event does not correspond to this window, we take it from the event queue anyways and re-post it afterwards, to give other windows the opportunity to consume their events. You can view, comment on, or merge this pull request online at:

https://github.com/OpenSmalltalk/opensmalltalk-vm/pull/300

-- Commit Summary --

* Consume all events in the event queue to avoid application lockups

-- File Changes --

M platforms/iOS/vm/OSX/sqSqueakOSXApplication+events.m (50)

-- Patch Links --

https://github.com/OpenSmalltalk/opensmalltalk-vm/pull/300.patch https://github.com/OpenSmalltalk/opensmalltalk-vm/pull/300.diff