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

@@ -34,19 +34,19 @@
 
 @implementation ViewController
 
-- (instancetype)initWithNibName:(nullable NSString *)nibNameOrNil bundle:(nullable NSBundle *)nibBundleOrNil 
+- (instancetype)initWithNibName:(nullable NSString *)nibNameOrNil bundle:(nullable NSBundle *)nibBundleOrNil
 {
     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
-    
+
     _device = MTLCreateSystemDefaultDevice();
     _commandQueue = [_device newCommandQueue];
 
-    if (!self.device) 
+    if (!self.device)
     {
         NSLog(@"Metal is not supported");
         abort();
     }
-    
+
     // Setup Dear ImGui context
     // FIXME: This example doesn't have proper cleanup...
     IMGUI_CHECKVERSION();
@@ -76,16 +76,16 @@
     //io.Fonts->AddFontFromFileTTF("../../misc/fonts/ProggyTiny.ttf", 10.0f);
     //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
     //IM_ASSERT(font != NULL);
-    
+
     return self;
 }
 
-- (MTKView *)mtkView 
+- (MTKView *)mtkView
 {
     return (MTKView *)self.view;
 }
 
-- (void)loadView 
+- (void)loadView
 {
     self.view = [[MTKView alloc] initWithFrame:CGRectMake(0, 0, 1200, 720)];
 }
@@ -96,7 +96,7 @@
 
     self.mtkView.device = self.device;
     self.mtkView.delegate = self;
-    
+
 #if TARGET_OS_OSX
     // Add a tracking area in order to receive mouse events whenever the mouse is within the bounds of our view
     NSTrackingArea *trackingArea = [[NSTrackingArea alloc] initWithRect:NSZeroRect
@@ -108,20 +108,17 @@
     // 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();
-    
+
 #endif
 }