Backends: OSX: Inputs: Monitor NSKeyUp events to catch missing keyUp for key when user press Cmd + key (#5128)

backends/imgui_impl_osx.mm

@@ -23,6 +23,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
+//  2022-03-22: Inputs: Monitor NSKeyUp events to catch missing keyUp for key when user press Cmd + key
 //  2022-02-07: Inputs: Forward keyDown/keyUp events to OS when unused by dear imgui.
 //  2022-01-31: Fix building with old Xcode versions that are missing gamepad features.
 //  2022-01-26: Inputs: replaced short-lived io.AddKeyModsEvent() (added two weeks ago)with io.AddKeyEvent() using ImGuiKey_ModXXX flags. Sorry for the confusion.
@@ -429,7 +430,7 @@ bool ImGui_ImplOSX_Init(NSView* view)
 
     // Some events do not raise callbacks of AppView in some circumstances (for example when CMD key is held down).
     // This monitor taps into global event stream and captures these events.
-    NSEventMask eventMask = NSEventMaskFlagsChanged;
+    NSEventMask eventMask = NSEventMaskFromType(NSKeyUp) | NSEventMaskFlagsChanged;
     [NSEvent addLocalMonitorForEventsMatchingMask:eventMask handler:^NSEvent * _Nullable(NSEvent *event)
     {
         ImGui_ImplOSX_HandleEvent(event, g_KeyEventResponder);

docs/CHANGELOG.txt

@@ -71,6 +71,7 @@ Other Changes:
 - ImVector: Fixed erase() with empty range. (#5009) [@thedmd]
 - Backends: SDL: Fixed dragging out viewport broken on some SDL setups. (#5012) [@rokups]
 - Backends: SDL: Added support for extra mouse buttons (SDL_BUTTON_X1/SDL_BUTTON_X2). (#5125) [@sgiurgiu]
+- Backends: OSX: Monitor NSKeyUp events to catch missing keyUp for key when user press Cmd + key (#5128) [@thedmd]
 - Examples: Emscripten: Fix building for latest Emscripten specs. (#3632)