From ee436aa8039f2b86bb08a554b737db4f7ab1f8b4 Mon Sep 17 00:00:00 2001 From: thedmd Date: Sun, 12 Dec 2021 12:04:13 +0100 Subject: [PATCH] Backends: OSX: Update to use io.AddEventKey() will full key map (#2625, #1873, #4858) --- backends/imgui_impl_osx.h | 2 +- backends/imgui_impl_osx.mm | 285 ++++++++++++++++++------- examples/example_apple_metal/main.mm | 15 +- examples/example_apple_opengl2/main.mm | 9 - 4 files changed, 207 insertions(+), 104 deletions(-) diff --git a/backends/imgui_impl_osx.h b/backends/imgui_impl_osx.h index 6cfe7eb2e..37851a3c3 100644 --- a/backends/imgui_impl_osx.h +++ b/backends/imgui_impl_osx.h @@ -4,9 +4,9 @@ // Implemented features: // [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'. +// [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy kVK_* values will also be supported unless IMGUI_DISABLE_OBSOLETE_KEYIO is set] // [X] Platform: OSX clipboard is supported within core Dear ImGui (no specific code in this backend). // [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'. -// [X] Platform: Keyboard arrays indexed using kVK_* codes, e.g. ImGui::IsKeyPressed(kVK_Space). // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this. // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need. diff --git a/backends/imgui_impl_osx.mm b/backends/imgui_impl_osx.mm index 9acd8baae..64a45efb1 100644 --- a/backends/imgui_impl_osx.mm +++ b/backends/imgui_impl_osx.mm @@ -4,9 +4,9 @@ // Implemented features: // [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'. +// [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy kVK_* values will also be supported unless IMGUI_DISABLE_OBSOLETE_KEYIO is set] // [X] Platform: OSX clipboard is supported within core Dear ImGui (no specific code in this backend). // [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'. -// [X] Platform: Keyboard arrays indexed using kVK_* codes, e.g. ImGui::IsKeyPressed(kVK_Space). // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this. // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need. @@ -22,6 +22,7 @@ // CHANGELOG // (minor and older changes stripped away, please see git history for details) +// 2022-01-10: Inputs: calling new io.AddKeyEvent() + io.SetKeyEventNativeData() API (1.87+). Support for full ImGuiKey range. // 2021-12-13: *BREAKING CHANGE* Add NSView parameter to ImGui_ImplOSX_Init(). Generally fix keyboard support. Using kVK_* codes for keyboard keys. // 2021-12-13: Add game controller support. // 2021-09-21: Use mach_absolute_time as CFAbsoluteTimeGetCurrent can jump backwards. @@ -50,6 +51,7 @@ static NSCursor* g_MouseCursors[ImGuiMouseCursor_COUNT] = {}; static bool g_MouseCursorHidden = false; static bool g_MouseJustPressed[ImGuiMouseButton_COUNT] = {}; static bool g_MouseDown[ImGuiMouseButton_COUNT] = {}; +static ImGuiKeyModFlags g_KeyModifiers = ImGuiKeyModFlags_None; static ImFocusObserver* g_FocusObserver = nil; static KeyEventResponder* g_KeyEventResponder = nil; @@ -73,13 +75,6 @@ static double GetMachAbsoluteTimeInSeconds() return (double)mach_absolute_time() * g_HostClockPeriod; } -static void resetKeys() -{ - ImGuiIO& io = ImGui::GetIO(); - memset(io.KeysDown, 0, sizeof(io.KeysDown)); - io.KeyCtrl = io.KeyShift = io.KeyAlt = io.KeySuper = false; -} - /** KeyEventResponder implements the NSTextInputClient protocol as is required by the macOS text input manager. @@ -105,10 +100,17 @@ static void resetKeys() - (void)keyDown:(NSEvent*)event { + ImGui_ImplOSX_HandleEvent(event, self); + // Call to the macOS input manager system. [self interpretKeyEvents:@[event]]; } +- (void)keyUp:(NSEvent*)event +{ + ImGui_ImplOSX_HandleEvent(event, self); +} + - (void)insertText:(id)aString replacementRange:(NSRange)replacementRange { ImGuiIO& io = ImGui::GetIO(); @@ -195,16 +197,134 @@ static void resetKeys() { ImGuiIO& io = ImGui::GetIO(); io.AddFocusEvent(false); - - // Unfocused applications do not receive input events, therefore we must manually - // release any pressed keys when application loses focus, otherwise they would remain - // stuck in a pressed state. https://github.com/ocornut/imgui/issues/3832 - resetKeys(); } @end // Functions +static ImGuiKey ImGui_ImplOSX_KeyCodeToImGuiKey(int key_code) +{ + switch (key_code) + { + case kVK_ANSI_A: return ImGuiKey_A; + case kVK_ANSI_S: return ImGuiKey_S; + case kVK_ANSI_D: return ImGuiKey_D; + case kVK_ANSI_F: return ImGuiKey_F; + case kVK_ANSI_H: return ImGuiKey_H; + case kVK_ANSI_G: return ImGuiKey_G; + case kVK_ANSI_Z: return ImGuiKey_Z; + case kVK_ANSI_X: return ImGuiKey_X; + case kVK_ANSI_C: return ImGuiKey_C; + case kVK_ANSI_V: return ImGuiKey_V; + case kVK_ANSI_B: return ImGuiKey_B; + case kVK_ANSI_Q: return ImGuiKey_Q; + case kVK_ANSI_W: return ImGuiKey_W; + case kVK_ANSI_E: return ImGuiKey_E; + case kVK_ANSI_R: return ImGuiKey_R; + case kVK_ANSI_Y: return ImGuiKey_Y; + case kVK_ANSI_T: return ImGuiKey_T; + case kVK_ANSI_1: return ImGuiKey_1; + case kVK_ANSI_2: return ImGuiKey_2; + case kVK_ANSI_3: return ImGuiKey_3; + case kVK_ANSI_4: return ImGuiKey_4; + case kVK_ANSI_6: return ImGuiKey_6; + case kVK_ANSI_5: return ImGuiKey_5; + case kVK_ANSI_Equal: return ImGuiKey_Equal; + case kVK_ANSI_9: return ImGuiKey_9; + case kVK_ANSI_7: return ImGuiKey_7; + case kVK_ANSI_Minus: return ImGuiKey_Minus; + case kVK_ANSI_8: return ImGuiKey_8; + case kVK_ANSI_0: return ImGuiKey_0; + case kVK_ANSI_RightBracket: return ImGuiKey_RightBracket; + case kVK_ANSI_O: return ImGuiKey_O; + case kVK_ANSI_U: return ImGuiKey_U; + case kVK_ANSI_LeftBracket: return ImGuiKey_LeftBracket; + case kVK_ANSI_I: return ImGuiKey_I; + case kVK_ANSI_P: return ImGuiKey_P; + case kVK_ANSI_L: return ImGuiKey_L; + case kVK_ANSI_J: return ImGuiKey_J; + case kVK_ANSI_Quote: return ImGuiKey_Apostrophe; + case kVK_ANSI_K: return ImGuiKey_K; + case kVK_ANSI_Semicolon: return ImGuiKey_Semicolon; + case kVK_ANSI_Backslash: return ImGuiKey_Backslash; + case kVK_ANSI_Comma: return ImGuiKey_Comma; + case kVK_ANSI_Slash: return ImGuiKey_Slash; + case kVK_ANSI_N: return ImGuiKey_N; + case kVK_ANSI_M: return ImGuiKey_M; + case kVK_ANSI_Period: return ImGuiKey_Period; + case kVK_ANSI_Grave: return ImGuiKey_GraveAccent; + case kVK_ANSI_KeypadDecimal: return ImGuiKey_KeypadDecimal; + case kVK_ANSI_KeypadMultiply: return ImGuiKey_KeypadMultiply; + case kVK_ANSI_KeypadPlus: return ImGuiKey_KeypadAdd; + case kVK_ANSI_KeypadClear: return ImGuiKey_NumLock; + case kVK_ANSI_KeypadDivide: return ImGuiKey_KeypadDivide; + case kVK_ANSI_KeypadEnter: return ImGuiKey_KeypadEnter; + case kVK_ANSI_KeypadMinus: return ImGuiKey_KeypadSubtract; + case kVK_ANSI_KeypadEquals: return ImGuiKey_KeypadEqual; + case kVK_ANSI_Keypad0: return ImGuiKey_Keypad0; + case kVK_ANSI_Keypad1: return ImGuiKey_Keypad1; + case kVK_ANSI_Keypad2: return ImGuiKey_Keypad2; + case kVK_ANSI_Keypad3: return ImGuiKey_Keypad3; + case kVK_ANSI_Keypad4: return ImGuiKey_Keypad4; + case kVK_ANSI_Keypad5: return ImGuiKey_Keypad5; + case kVK_ANSI_Keypad6: return ImGuiKey_Keypad6; + case kVK_ANSI_Keypad7: return ImGuiKey_Keypad7; + case kVK_ANSI_Keypad8: return ImGuiKey_Keypad8; + case kVK_ANSI_Keypad9: return ImGuiKey_Keypad9; + case kVK_Return: return ImGuiKey_Enter; + case kVK_Tab: return ImGuiKey_Tab; + case kVK_Space: return ImGuiKey_Space; + case kVK_Delete: return ImGuiKey_Backspace; + case kVK_Escape: return ImGuiKey_Escape; + case kVK_Command: return ImGuiKey_LeftSuper; + case kVK_Shift: return ImGuiKey_LeftShift; + case kVK_CapsLock: return ImGuiKey_CapsLock; + case kVK_Option: return ImGuiKey_LeftAlt; + case kVK_Control: return ImGuiKey_LeftControl; + case kVK_RightCommand: return ImGuiKey_RightSuper; + case kVK_RightShift: return ImGuiKey_RightShift; + case kVK_RightOption: return ImGuiKey_RightAlt; + case kVK_RightControl: return ImGuiKey_RightControl; +// case kVK_Function: return ImGuiKey_; +// case kVK_F17: return ImGuiKey_; +// case kVK_VolumeUp: return ImGuiKey_; +// case kVK_VolumeDown: return ImGuiKey_; +// case kVK_Mute: return ImGuiKey_; +// case kVK_F18: return ImGuiKey_; +// case kVK_F19: return ImGuiKey_; +// case kVK_F20: return ImGuiKey_; + case kVK_F5: return ImGuiKey_F5; + case kVK_F6: return ImGuiKey_F6; + case kVK_F7: return ImGuiKey_F7; + case kVK_F3: return ImGuiKey_F3; + case kVK_F8: return ImGuiKey_F8; + case kVK_F9: return ImGuiKey_F9; + case kVK_F11: return ImGuiKey_F11; + case kVK_F13: return ImGuiKey_PrintScreen; +// case kVK_F16: return ImGuiKey_; +// case kVK_F14: return ImGuiKey_; + case kVK_F10: return ImGuiKey_F10; + case 0x6E: return ImGuiKey_Menu; + case kVK_F12: return ImGuiKey_F12; +// case kVK_F15: return ImGuiKey_; + case kVK_Help: return ImGuiKey_Insert; + case kVK_Home: return ImGuiKey_Home; + case kVK_PageUp: return ImGuiKey_PageUp; + case kVK_ForwardDelete: return ImGuiKey_Delete; + case kVK_F4: return ImGuiKey_F4; + case kVK_End: return ImGuiKey_End; + case kVK_F2: return ImGuiKey_F2; + case kVK_PageDown: return ImGuiKey_PageDown; + case kVK_F1: return ImGuiKey_F1; + case kVK_LeftArrow: return ImGuiKey_LeftArrow; + case kVK_RightArrow: return ImGuiKey_RightArrow; + case kVK_DownArrow: return ImGuiKey_DownArrow; + case kVK_UpArrow: return ImGuiKey_UpArrow; + default: return ImGuiKey_None; + } +} + + bool ImGui_ImplOSX_Init(NSView* view) { ImGuiIO& io = ImGui::GetIO(); @@ -216,30 +336,6 @@ bool ImGui_ImplOSX_Init(NSView* view) //io.BackendFlags |= ImGuiBackendFlags_HasMouseHoveredViewport; // We can set io.MouseHoveredViewport correctly (optional, not easy) io.BackendPlatformName = "imgui_impl_osx"; - // Keyboard mapping. Dear ImGui will use those indices to peek into the io.KeyDown[] array. - io.KeyMap[ImGuiKey_Tab] = kVK_Tab; - io.KeyMap[ImGuiKey_LeftArrow] = kVK_LeftArrow; - io.KeyMap[ImGuiKey_RightArrow] = kVK_RightArrow; - io.KeyMap[ImGuiKey_UpArrow] = kVK_UpArrow; - io.KeyMap[ImGuiKey_DownArrow] = kVK_DownArrow; - io.KeyMap[ImGuiKey_PageUp] = kVK_PageUp; - io.KeyMap[ImGuiKey_PageDown] = kVK_PageDown; - io.KeyMap[ImGuiKey_Home] = kVK_Home; - io.KeyMap[ImGuiKey_End] = kVK_End; - io.KeyMap[ImGuiKey_Insert] = kVK_F13; - io.KeyMap[ImGuiKey_Delete] = kVK_ForwardDelete; - io.KeyMap[ImGuiKey_Backspace] = kVK_Delete; - io.KeyMap[ImGuiKey_Space] = kVK_Space; - io.KeyMap[ImGuiKey_Enter] = kVK_Return; - io.KeyMap[ImGuiKey_Escape] = kVK_Escape; - io.KeyMap[ImGuiKey_KeypadEnter] = kVK_ANSI_KeypadEnter; - io.KeyMap[ImGuiKey_A] = kVK_ANSI_A; - io.KeyMap[ImGuiKey_C] = kVK_ANSI_C; - io.KeyMap[ImGuiKey_V] = kVK_ANSI_V; - io.KeyMap[ImGuiKey_X] = kVK_ANSI_X; - io.KeyMap[ImGuiKey_Y] = kVK_ANSI_Y; - io.KeyMap[ImGuiKey_Z] = kVK_ANSI_Z; - // Load cursors. Some of them are undocumented. g_MouseCursorHidden = false; g_MouseCursors[ImGuiMouseCursor_Arrow] = [NSCursor arrowCursor]; @@ -296,6 +392,15 @@ bool ImGui_ImplOSX_Init(NSView* view) g_KeyEventResponder = [[KeyEventResponder alloc] initWithFrame:NSZeroRect]; [view addSubview:g_KeyEventResponder]; + // 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; + [NSEvent addLocalMonitorForEventsMatchingMask:eventMask handler:^NSEvent * _Nullable(NSEvent *event) + { + ImGui_ImplOSX_HandleEvent(event, g_KeyEventResponder); + return event; + }]; + return true; } @@ -344,7 +449,7 @@ static void ImGui_ImplOSX_UpdateMouseCursorAndButtons() } } -void ImGui_ImplOSX_UpdateGamepads() +static void ImGui_ImplOSX_UpdateGamepads() { ImGuiIO& io = ImGui::GetIO(); memset(io.NavInputs, 0, sizeof(io.NavInputs)); @@ -388,6 +493,15 @@ void ImGui_ImplOSX_UpdateGamepads() io.BackendFlags |= ImGuiBackendFlags_HasGamepad; } +static void ImGui_ImplOSX_UpdateKeyModifiers() +{ + ImGuiIO& io = ImGui::GetIO(); + io.KeyCtrl = (g_KeyModifiers & ImGuiKeyModFlags_Ctrl) != 0; + io.KeyShift = (g_KeyModifiers & ImGuiKeyModFlags_Shift) != 0; + io.KeyAlt = (g_KeyModifiers & ImGuiKeyModFlags_Alt) != 0; + io.KeySuper = (g_KeyModifiers & ImGuiKeyModFlags_Super) != 0; +} + void ImGui_ImplOSX_NewFrame(NSView* view) { // Setup display size @@ -409,28 +523,11 @@ void ImGui_ImplOSX_NewFrame(NSView* view) io.DeltaTime = (float)(current_time - g_Time); g_Time = current_time; + ImGui_ImplOSX_UpdateKeyModifiers(); ImGui_ImplOSX_UpdateMouseCursorAndButtons(); ImGui_ImplOSX_UpdateGamepads(); } -NSString* NSStringFromPhase(NSEventPhase phase) -{ - static NSString* strings[] = - { - @"none", - @"began", - @"stationary", - @"changed", - @"ended", - @"cancelled", - @"mayBegin", - }; - - int pos = phase == NSEventPhaseNone ? 0 : __builtin_ctzl((NSUInteger)phase) + 1; - - return strings[pos]; -} - bool ImGui_ImplOSX_HandleEvent(NSEvent* event, NSView* view) { ImGuiIO& io = ImGui::GetIO(); @@ -497,8 +594,6 @@ bool ImGui_ImplOSX_HandleEvent(NSEvent* event, NSView* view) wheel_dy = [event deltaY]; } - //NSLog(@"dx=%0.3ff, dy=%0.3f, phase=%@", wheel_dx, wheel_dy, NSStringFromPhase(event.phase)); - if (fabs(wheel_dx) > 0.0) io.MouseWheelH += (float)wheel_dx * 0.1f; if (fabs(wheel_dy) > 0.0) @@ -508,35 +603,65 @@ bool ImGui_ImplOSX_HandleEvent(NSEvent* event, NSView* view) if (event.type == NSEventTypeKeyDown || event.type == NSEventTypeKeyUp) { - unsigned short code = event.keyCode; - IM_ASSERT(code >= 0 && code < IM_ARRAYSIZE(io.KeysDown)); - io.KeysDown[code] = event.type == NSEventTypeKeyDown; - NSEventModifierFlags flags = event.modifierFlags; - io.KeyCtrl = (flags & NSEventModifierFlagControl) != 0; - io.KeyShift = (flags & NSEventModifierFlagShift) != 0; - io.KeyAlt = (flags & NSEventModifierFlagOption) != 0; - io.KeySuper = (flags & NSEventModifierFlagCommand) != 0; + if ([event isARepeat]) + return io.WantCaptureKeyboard; + + ImGuiKey key = ImGui_ImplOSX_KeyCodeToImGuiKey(key_code); + io.AddKeyEvent(key, event.type == NSEventTypeKeyDown); + io.SetKeyEventNativeData(key, (int)[event keyCode], -1); // To support legacy indexing (<1.87 user code) + return io.WantCaptureKeyboard; } if (event.type == NSEventTypeFlagsChanged) { - NSEventModifierFlags flags = event.modifierFlags; - switch (event.keyCode) + unsigned short key_code = [event keyCode]; + unsigned int flags = [event modifierFlags] & NSEventModifierFlagDeviceIndependentFlagsMask; + + ImGuiKeyModFlags imgui_flags = ImGuiKeyModFlags_None; + if (flags & NSEventModifierFlagShift) + imgui_flags |= ImGuiKeyModFlags_Shift; + if (flags & NSEventModifierFlagControl) + imgui_flags |= ImGuiKeyModFlags_Ctrl; + if (flags & NSEventModifierFlagOption) + imgui_flags |= ImGuiKeyModFlags_Alt; + if (flags & NSEventModifierFlagCommand) + imgui_flags |= ImGuiKeyModFlags_Super; + + g_KeyModifiers = imgui_flags; + + ImGuiKey key = ImGui_ImplOSX_KeyCodeToImGuiKey(key_code); + if (key != ImGuiKey_None) { - case kVK_Control: - io.KeyCtrl = (flags & NSEventModifierFlagControl) != 0; - break; - case kVK_Shift: - io.KeyShift = (flags & NSEventModifierFlagShift) != 0; - break; - case kVK_Option: - io.KeyAlt = (flags & NSEventModifierFlagOption) != 0; - break; - case kVK_Command: - io.KeySuper = (flags & NSEventModifierFlagCommand) != 0; - break; + // macOS does not generate down/up event for modifiers. We're trying + // to use hardware dependent masks to extract that information. + // 'imgui_mask' is left as a fallback. + NSEventModifierFlags mask = 0; + ImGuiKeyModFlags imgui_mask = ImGuiKeyModFlags_None; + switch (key_code) + { + case kVK_Control: mask = 0x0001; imgui_mask = ImGuiKeyModFlags_Ctrl; break; + case kVK_RightControl: mask = 0x2000; imgui_mask = ImGuiKeyModFlags_Ctrl; break; + case kVK_Shift: mask = 0x0002; imgui_mask = ImGuiKeyModFlags_Shift; break; + case kVK_RightShift: mask = 0x0004; imgui_mask = ImGuiKeyModFlags_Shift; break; + case kVK_Command: mask = 0x0008; imgui_mask = ImGuiKeyModFlags_Super; break; + case kVK_RightCommand: mask = 0x0010; imgui_mask = ImGuiKeyModFlags_Super; break; + case kVK_Option: mask = 0x0020; imgui_mask = ImGuiKeyModFlags_Alt; break; + case kVK_RightOption: mask = 0x0040; imgui_mask = ImGuiKeyModFlags_Alt; break; + } + + if (mask) + { + NSEventModifierFlags modifier_flags = [event modifierFlags]; + io.AddKeyEvent(key, (modifier_flags & mask) != 0); + } + else if (imgui_mask) + { + io.AddKeyEvent(key, (imgui_flags & imgui_mask) != 0); + } + io.SetKeyEventNativeData(key, keycode, -1); // To support legacy indexing (<1.87 user code) } + return io.WantCaptureKeyboard; } diff --git a/examples/example_apple_metal/main.mm b/examples/example_apple_metal/main.mm index bbe51d31f..5c05fee5d 100644 --- a/examples/example_apple_metal/main.mm +++ b/examples/example_apple_metal/main.mm @@ -107,18 +107,6 @@ userInfo:nil]; [self.view addTrackingArea:trackingArea]; - // 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. - // To match the behavior of other backends, we pass every event down to the OS. - NSEventMask eventMask = NSEventMaskKeyDown | NSEventMaskKeyUp | NSEventMaskFlagsChanged; - [NSEvent addLocalMonitorForEventsMatchingMask:eventMask handler:^NSEvent * _Nullable(NSEvent *event) - { - ImGui_ImplOSX_HandleEvent(event, self.view); - return event; - }]; - ImGui_ImplOSX_Init(self.view); #endif @@ -223,8 +211,7 @@ #if TARGET_OS_OSX -// Forward Mouse/Keyboard events to Dear ImGui OSX backend. -// Other events are registered via addLocalMonitorForEventsMatchingMask() +// Forward Mouse events to Dear ImGui OSX backend. -(void)mouseDown:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self.view); } -(void)rightMouseDown:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self.view); } -(void)otherMouseDown:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self.view); } diff --git a/examples/example_apple_opengl2/main.mm b/examples/example_apple_opengl2/main.mm index f859162e5..482a94f50 100644 --- a/examples/example_apple_opengl2/main.mm +++ b/examples/example_apple_opengl2/main.mm @@ -36,15 +36,6 @@ -(void)initialize { - // 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 = NSEventMaskKeyDown | NSEventMaskKeyUp | NSEventMaskFlagsChanged; - [NSEvent addLocalMonitorForEventsMatchingMask:eventMask handler:^NSEvent * _Nullable(NSEvent *event) - { - ImGui_ImplOSX_HandleEvent(event, self); - return event; - }]; - // Setup Dear ImGui context // FIXME: This example doesn't have proper cleanup... IMGUI_CHECKVERSION();