Examples: Apple+Metal: Forward events to OS key combinations like CMD+Q can work. (#3554)

docs/CHANGELOG.txt

@@ -77,6 +77,7 @@ Other Changes:
 - Backends: Vulkan: Added support for specifying which subpass to reference during VkPipeline creation. (@3579) [@bdero]
 - Backends: OSX: Fix keypad-enter key not working on MacOS. (#3554) [@rokups, @lfnoise]
 - Examples: Apple+Metal: Consolidated/simplified to get closer to other examples. (#3543) [@warrenm]
+- Examples: Apple+Metal: Forward events down so OS key combination like Cmd+Q can work. (#3554) [@rokups]
 - Docs: Split examples/README.txt into docs/BACKENDS.md and docs/EXAMPLES.md improved them.
 - Docs: Consistently renamed all occurences of "binding" and "back-end" to "backend" in comments and docs.
 

examples/example_apple_metal/main.mm

@@ -108,16 +108,13 @@
     // If we want to receive key events, we either need to be in the responder chain of the key view,
     // or else we can install a local monitor. The consequence of this heavy-handed approach is that
     // we receive events for all controls, not just Dear ImGui widgets. If we had native controls in our
-    // window, we'd want to be much more careful than just ingesting the complete event stream, though we
+    // window, we'd want to be much more careful than just ingesting the complete event stream.
-    // do make an effort to be good citizens by passing along events when Dear ImGui doesn't want to capture.
+    // To match the behavior of other backends, we pass every event down to the OS.
     NSEventMask eventMask = NSEventMaskKeyDown | NSEventMaskKeyUp | NSEventMaskFlagsChanged | NSEventTypeScrollWheel;
     [NSEvent addLocalMonitorForEventsMatchingMask:eventMask handler:^NSEvent * _Nullable(NSEvent *event)
     {
-        BOOL wantsCapture = ImGui_ImplOSX_HandleEvent(event, self.view);
+        ImGui_ImplOSX_HandleEvent(event, self.view);
-        if (event.type == NSEventTypeKeyDown && wantsCapture)
+        return event;
-            return nil;
-        else
-            return event;
     }];
 
     ImGui_ImplOSX_Init();