// dear imgui: Platform Backend for Windows (standard windows API for 32 and 64 bits applications) // This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..) // Implemented features: // [X] Platform: Clipboard support (for Win32 this is actually part of core dear imgui) // [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 VK_* values will also be supported unless IMGUI_DISABLE_OBSOLETE_KEYIO is set] // [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'. // [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'. // [X] Platform: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'. // 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. // If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp. // Read online: https://github.com/ocornut/imgui/tree/master/docs #include "imgui.h" #include "imgui_impl_win32.h" #ifndef WIN32_LEAN_AND_MEAN #define WIN32_LEAN_AND_MEAN #endif #include #include // GET_X_LPARAM(), GET_Y_LPARAM() #include #include // Configuration flags to add in your imconfig.h file: //#define IMGUI_IMPL_WIN32_DISABLE_GAMEPAD // Disable gamepad support. This was meaningful before <1.81 but we now load XInput dynamically so the option is now less relevant. // Using XInput for gamepad (will load DLL dynamically) #ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD #include typedef DWORD (WINAPI *PFN_XInputGetCapabilities)(DWORD, DWORD, XINPUT_CAPABILITIES*); typedef DWORD (WINAPI *PFN_XInputGetState)(DWORD, XINPUT_STATE*); #endif // CHANGELOG // (minor and older changes stripped away, please see git history for details) // 2022-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface. // 2022-01-17: Inputs: calling new io.AddMousePosEvent(), io.AddMouseButtonEvent(), io.AddMouseWheelEvent() API (1.87+). // 2022-01-17: Inputs: always calling io.AddKeyModsEvent() next and before a key event (not in NewFrame) to fix input queue with very low framerates. // 2022-01-12: Inputs: Update mouse inputs using WM_MOUSEMOVE/WM_MOUSELEAVE + fallback to provide it when focused but not hovered/captured. More standard and will allow us to pass it to future input queue API. // 2022-01-12: Inputs: Maintain our own copy of MouseButtonsDown mask instead of using ImGui::IsAnyMouseDown() which will be obsoleted. // 2022-01-10: Inputs: calling new io.AddKeyEvent(), io.AddKeyModsEvent() + io.SetKeyEventNativeData() API (1.87+). Support for full ImGuiKey range. // 2021-12-16: Inputs: Fill VK_LCONTROL/VK_RCONTROL/VK_LSHIFT/VK_RSHIFT/VK_LMENU/VK_RMENU for completeness. // 2021-08-17: Calling io.AddFocusEvent() on WM_SETFOCUS/WM_KILLFOCUS messages. // 2021-08-02: Inputs: Fixed keyboard modifiers being reported when host window doesn't have focus. // 2021-07-29: Inputs: MousePos is correctly reported when the host platform window is hovered but not focused (using TrackMouseEvent() to receive WM_MOUSELEAVE events). // 2021-06-29: Reorganized backend to pull data from a single structure to facilitate usage with multiple-contexts (all g_XXXX access changed to bd->XXXX). // 2021-06-08: Fixed ImGui_ImplWin32_EnableDpiAwareness() and ImGui_ImplWin32_GetDpiScaleForMonitor() to handle Windows 8.1/10 features without a manifest (per-monitor DPI, and properly calls SetProcessDpiAwareness() on 8.1). // 2021-03-23: Inputs: Clearing keyboard down array when losing focus (WM_KILLFOCUS). // 2021-02-18: Added ImGui_ImplWin32_EnableAlphaCompositing(). Non Visual Studio users will need to link with dwmapi.lib (MinGW/gcc: use -ldwmapi). // 2021-02-17: Fixed ImGui_ImplWin32_EnableDpiAwareness() attempting to get SetProcessDpiAwareness from shcore.dll on Windows 8 whereas it is only supported on Windows 8.1. // 2021-01-25: Inputs: Dynamically loading XInput DLL. // 2020-12-04: Misc: Fixed setting of io.DisplaySize to invalid/uninitialized data when after hwnd has been closed. // 2020-03-03: Inputs: Calling AddInputCharacterUTF16() to support surrogate pairs leading to codepoint >= 0x10000 (for more complete CJK inputs) // 2020-02-17: Added ImGui_ImplWin32_EnableDpiAwareness(), ImGui_ImplWin32_GetDpiScaleForHwnd(), ImGui_ImplWin32_GetDpiScaleForMonitor() helper functions. // 2020-01-14: Inputs: Added support for #define IMGUI_IMPL_WIN32_DISABLE_GAMEPAD/IMGUI_IMPL_WIN32_DISABLE_LINKING_XINPUT. // 2019-12-05: Inputs: Added support for ImGuiMouseCursor_NotAllowed mouse cursor. // 2019-05-11: Inputs: Don't filter value from WM_CHAR before calling AddInputCharacter(). // 2019-01-17: Misc: Using GetForegroundWindow()+IsChild() instead of GetActiveWindow() to be compatible with windows created in a different thread or parent. // 2019-01-17: Inputs: Added support for mouse buttons 4 and 5 via WM_XBUTTON* messages. // 2019-01-15: Inputs: Added support for XInput gamepads (if ImGuiConfigFlags_NavEnableGamepad is set by user application). // 2018-11-30: Misc: Setting up io.BackendPlatformName so it can be displayed in the About Window. // 2018-06-29: Inputs: Added support for the ImGuiMouseCursor_Hand cursor. // 2018-06-10: Inputs: Fixed handling of mouse wheel messages to support fine position messages (typically sent by track-pads). // 2018-06-08: Misc: Extracted imgui_impl_win32.cpp/.h away from the old combined DX9/DX10/DX11/DX12 examples. // 2018-03-20: Misc: Setup io.BackendFlags ImGuiBackendFlags_HasMouseCursors and ImGuiBackendFlags_HasSetMousePos flags + honor ImGuiConfigFlags_NoMouseCursorChange flag. // 2018-02-20: Inputs: Added support for mouse cursors (ImGui::GetMouseCursor() value and WM_SETCURSOR message handling). // 2018-02-06: Inputs: Added mapping for ImGuiKey_Space. // 2018-02-06: Inputs: Honoring the io.WantSetMousePos by repositioning the mouse (when using navigation and ImGuiConfigFlags_NavMoveMouse is set). // 2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves. // 2018-01-20: Inputs: Added Horizontal Mouse Wheel support. // 2018-01-08: Inputs: Added mapping for ImGuiKey_Insert. // 2018-01-05: Inputs: Added WM_LBUTTONDBLCLK double-click handlers for window classes with the CS_DBLCLKS flag. // 2017-10-23: Inputs: Added WM_SYSKEYDOWN / WM_SYSKEYUP handlers so e.g. the VK_MENU key can be read. // 2017-10-23: Inputs: Using Win32 ::SetCapture/::GetCapture() to retrieve mouse positions outside the client area when dragging. // 2016-11-12: Inputs: Only call Win32 ::SetCursor(NULL) when io.MouseDrawCursor is set. // Forward Declarations static void ImGui_ImplWin32_InitPlatformInterface(); static void ImGui_ImplWin32_ShutdownPlatformInterface(); static void ImGui_ImplWin32_UpdateMonitors(); struct ImGui_ImplWin32_Data { HWND hWnd; HWND MouseHwnd; bool MouseTracked; int MouseButtonsDown; INT64 Time; INT64 TicksPerSecond; ImGuiMouseCursor LastMouseCursor; bool HasGamepad; bool WantUpdateHasGamepad; bool WantUpdateMonitors; #ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD HMODULE XInputDLL; PFN_XInputGetCapabilities XInputGetCapabilities; PFN_XInputGetState XInputGetState; #endif ImGui_ImplWin32_Data() { memset(this, 0, sizeof(*this)); } }; // Backend data stored in io.BackendPlatformUserData to allow support for multiple Dear ImGui contexts // It is STRONGLY preferred that you use docking branch with multi-viewports (== single Dear ImGui context + multiple windows) instead of multiple Dear ImGui contexts. // FIXME: multi-context support is not well tested and probably dysfunctional in this backend. // FIXME: some shared resources (mouse cursor shape, gamepad) are mishandled when using multi-context. static ImGui_ImplWin32_Data* ImGui_ImplWin32_GetBackendData() { return ImGui::GetCurrentContext() ? (ImGui_ImplWin32_Data*)ImGui::GetIO().BackendPlatformUserData : NULL; } // Functions bool ImGui_ImplWin32_Init(void* hwnd) { ImGuiIO& io = ImGui::GetIO(); IM_ASSERT(io.BackendPlatformUserData == NULL && "Already initialized a platform backend!"); INT64 perf_frequency, perf_counter; if (!::QueryPerformanceFrequency((LARGE_INTEGER*)&perf_frequency)) return false; if (!::QueryPerformanceCounter((LARGE_INTEGER*)&perf_counter)) return false; // Setup backend capabilities flags ImGui_ImplWin32_Data* bd = IM_NEW(ImGui_ImplWin32_Data)(); io.BackendPlatformUserData = (void*)bd; io.BackendPlatformName = "imgui_impl_win32"; io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional) io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used) io.BackendFlags |= ImGuiBackendFlags_PlatformHasViewports; // We can create multi-viewports on the Platform side (optional) io.BackendFlags |= ImGuiBackendFlags_HasMouseHoveredViewport; // We can set io.MouseHoveredViewport correctly (optional, not easy) bd->hWnd = (HWND)hwnd; bd->WantUpdateHasGamepad = true; bd->WantUpdateMonitors = true; bd->TicksPerSecond = perf_frequency; bd->Time = perf_counter; bd->LastMouseCursor = ImGuiMouseCursor_COUNT; // Our mouse update function expect PlatformHandle to be filled for the main viewport ImGuiViewport* main_viewport = ImGui::GetMainViewport(); main_viewport->PlatformHandle = main_viewport->PlatformHandleRaw = (void*)bd->hWnd; if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable) ImGui_ImplWin32_InitPlatformInterface(); // Dynamically load XInput library #ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD const char* xinput_dll_names[] = { "xinput1_4.dll", // Windows 8+ "xinput1_3.dll", // DirectX SDK "xinput9_1_0.dll", // Windows Vista, Windows 7 "xinput1_2.dll", // DirectX SDK "xinput1_1.dll" // DirectX SDK }; for (int n = 0; n < IM_ARRAYSIZE(xinput_dll_names); n++) if (HMODULE dll = ::LoadLibraryA(xinput_dll_names[n])) { bd->XInputDLL = dll; bd->XInputGetCapabilities = (PFN_XInputGetCapabilities)::GetProcAddress(dll, "XInputGetCapabilities"); bd->XInputGetState = (PFN_XInputGetState)::GetProcAddress(dll, "XInputGetState"); break; } #endif // IMGUI_IMPL_WIN32_DISABLE_GAMEPAD return true; } void ImGui_ImplWin32_Shutdown() { ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData(); IM_ASSERT(bd != NULL && "No platform backend to shutdown, or already shutdown?"); ImGuiIO& io = ImGui::GetIO(); ImGui_ImplWin32_ShutdownPlatformInterface(); // Unload XInput library #ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD if (bd->XInputDLL) ::FreeLibrary(bd->XInputDLL); #endif // IMGUI_IMPL_WIN32_DISABLE_GAMEPAD io.BackendPlatformName = NULL; io.BackendPlatformUserData = NULL; IM_DELETE(bd); } static bool ImGui_ImplWin32_UpdateMouseCursor() { ImGuiIO& io = ImGui::GetIO(); if (io.ConfigFlags & ImGuiConfigFlags_NoMouseCursorChange) return false; ImGuiMouseCursor imgui_cursor = ImGui::GetMouseCursor(); if (imgui_cursor == ImGuiMouseCursor_None || io.MouseDrawCursor) { // Hide OS mouse cursor if imgui is drawing it or if it wants no cursor ::SetCursor(NULL); } else { // Show OS mouse cursor LPTSTR win32_cursor = IDC_ARROW; switch (imgui_cursor) { case ImGuiMouseCursor_Arrow: win32_cursor = IDC_ARROW; break; case ImGuiMouseCursor_TextInput: win32_cursor = IDC_IBEAM; break; case ImGuiMouseCursor_ResizeAll: win32_cursor = IDC_SIZEALL; break; case ImGuiMouseCursor_ResizeEW: win32_cursor = IDC_SIZEWE; break; case ImGuiMouseCursor_ResizeNS: win32_cursor = IDC_SIZENS; break; case ImGuiMouseCursor_ResizeNESW: win32_cursor = IDC_SIZENESW; break; case ImGuiMouseCursor_ResizeNWSE: win32_cursor = IDC_SIZENWSE; break; case ImGuiMouseCursor_Hand: win32_cursor = IDC_HAND; break; case ImGuiMouseCursor_NotAllowed: win32_cursor = IDC_NO; break; } ::SetCursor(::LoadCursor(NULL, win32_cursor)); } return true; } static bool IsVkDown(int vk) { return (::GetKeyState(vk) & 0x8000) != 0; } static void ImGui_ImplWin32_AddKeyEvent(ImGuiKey key, bool down, int native_keycode, int native_scancode = -1) { ImGuiIO& io = ImGui::GetIO(); io.AddKeyEvent(key, down); io.SetKeyEventNativeData(key, native_keycode, native_scancode); // To support legacy indexing (<1.87 user code) IM_UNUSED(native_scancode); } static void ImGui_ImplWin32_ProcessKeyEventsWorkarounds() { // Left & right Shift keys: when both are pressed together, Windows tend to not generate the WM_KEYUP event for the first released one. if (ImGui::IsKeyDown(ImGuiKey_LeftShift) && !IsVkDown(VK_LSHIFT)) ImGui_ImplWin32_AddKeyEvent(ImGuiKey_LeftShift, false, VK_LSHIFT); if (ImGui::IsKeyDown(ImGuiKey_RightShift) && !IsVkDown(VK_RSHIFT)) ImGui_ImplWin32_AddKeyEvent(ImGuiKey_RightShift, false, VK_RSHIFT); // Sometimes WM_KEYUP for Win key is not passed down to the app (e.g. for Win+V on some setups, according to GLFW). if (ImGui::IsKeyDown(ImGuiKey_LeftSuper) && !IsVkDown(VK_LWIN)) ImGui_ImplWin32_AddKeyEvent(ImGuiKey_LeftSuper, false, VK_LWIN); if (ImGui::IsKeyDown(ImGuiKey_RightSuper) && !IsVkDown(VK_RWIN)) ImGui_ImplWin32_AddKeyEvent(ImGuiKey_RightSuper, false, VK_RWIN); } static void ImGui_ImplWin32_UpdateKeyModifiers() { ImGuiIO& io = ImGui::GetIO(); ImGuiKeyModFlags key_mods = ((IsVkDown(VK_CONTROL)) ? ImGuiKeyModFlags_Ctrl : 0) | ((IsVkDown(VK_SHIFT) ) ? ImGuiKeyModFlags_Shift : 0) | ((IsVkDown(VK_MENU)) ? ImGuiKeyModFlags_Alt : 0) | ((IsVkDown(VK_APPS)) ? ImGuiKeyModFlags_Super : 0); io.AddKeyModsEvent(key_mods); } // This code supports multi-viewports (multiple OS Windows mapped into different Dear ImGui viewports) // Because of that, it is a little more complicated than your typical single-viewport binding code! static void ImGui_ImplWin32_UpdateMouseData() { ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData(); ImGuiIO& io = ImGui::GetIO(); IM_ASSERT(bd->hWnd != 0); POINT mouse_screen_pos; bool has_mouse_screen_pos = ::GetCursorPos(&mouse_screen_pos) != 0; HWND focused_window = ::GetForegroundWindow(); const bool is_app_focused = (focused_window && (focused_window == bd->hWnd || ::IsChild(focused_window, bd->hWnd) || ImGui::FindViewportByPlatformHandle((void*)focused_window))); if (is_app_focused) { // (Optional) Set OS mouse position from Dear ImGui if requested (rarely used, only when ImGuiConfigFlags_NavEnableSetMousePos is enabled by user) // When multi-viewports are enabled, all Dear ImGui positions are same as OS positions. if (io.WantSetMousePos) { POINT pos = { (int)io.MousePos.x, (int)io.MousePos.y }; if ((io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable) == 0) ::ClientToScreen(focused_window, &pos); ::SetCursorPos(pos.x, pos.y); } // (Optional) Fallback to provide mouse position when focused (WM_MOUSEMOVE already provides this when hovered or captured) if (!io.WantSetMousePos && !bd->MouseTracked && has_mouse_screen_pos) { // Single viewport mode: mouse position in client window coordinates (io.MousePos is (0,0) when the mouse is on the upper-left corner of the app window) // (This is the position you can get with ::GetCursorPos() + ::ScreenToClient() or WM_MOUSEMOVE.) // Multi-viewport mode: mouse position in OS absolute coordinates (io.MousePos is (0,0) when the mouse is on the upper-left of the primary monitor) // (This is the position you can get with ::GetCursorPos() or WM_MOUSEMOVE + ::ClientToScreen(). In theory adding viewport->Pos to a client position would also be the same.) POINT mouse_pos = mouse_screen_pos; if (!(io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)) ::ScreenToClient(bd->hWnd, &mouse_pos); io.AddMousePosEvent((float)mouse_pos.x, (float)mouse_pos.y); } } // (Optional) When using multiple viewports: set io.MouseHoveredViewport to the viewport the OS mouse cursor is hovering. // Important: this information is not easy to provide and many high-level windowing library won't be able to provide it correctly, because // - This is _ignoring_ viewports with the ImGuiViewportFlags_NoInputs flag (pass-through windows). // - This is _regardless_ of whether another viewport is focused or being dragged from. // If ImGuiBackendFlags_HasMouseHoveredViewport is not set by the backend, imgui will ignore this field and infer the information by relying on the // rectangles and last focused time of every viewports it knows about. It will be unaware of foreign windows that may be sitting between or over your windows. io.MouseHoveredViewport = 0; if (has_mouse_screen_pos) if (HWND hovered_hwnd = ::WindowFromPoint(mouse_screen_pos)) if (ImGuiViewport* viewport = ImGui::FindViewportByPlatformHandle((void*)hovered_hwnd)) if ((viewport->Flags & ImGuiViewportFlags_NoInputs) == 0) // FIXME: We still get our NoInputs window with WM_NCHITTEST/HTTRANSPARENT code when decorated? io.MouseHoveredViewport = viewport->ID; } // Gamepad navigation mapping static void ImGui_ImplWin32_UpdateGamepads() { #ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD ImGuiIO& io = ImGui::GetIO(); ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData(); memset(io.NavInputs, 0, sizeof(io.NavInputs)); if ((io.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) == 0) return; // Calling XInputGetState() every frame on disconnected gamepads is unfortunately too slow. // Instead we refresh gamepad availability by calling XInputGetCapabilities() _only_ after receiving WM_DEVICECHANGE. if (bd->WantUpdateHasGamepad) { XINPUT_CAPABILITIES caps; bd->HasGamepad = bd->XInputGetCapabilities ? (bd->XInputGetCapabilities(0, XINPUT_FLAG_GAMEPAD, &caps) == ERROR_SUCCESS) : false; bd->WantUpdateHasGamepad = false; } io.BackendFlags &= ~ImGuiBackendFlags_HasGamepad; XINPUT_STATE xinput_state; if (bd->HasGamepad && bd->XInputGetState && bd->XInputGetState(0, &xinput_state) == ERROR_SUCCESS) { const XINPUT_GAMEPAD& gamepad = xinput_state.Gamepad; io.BackendFlags |= ImGuiBackendFlags_HasGamepad; #define MAP_BUTTON(NAV_NO, BUTTON_ENUM) { io.NavInputs[NAV_NO] = (gamepad.wButtons & BUTTON_ENUM) ? 1.0f : 0.0f; } #define MAP_ANALOG(NAV_NO, VALUE, V0, V1) { float vn = (float)(VALUE - V0) / (float)(V1 - V0); if (vn > 1.0f) vn = 1.0f; if (vn > 0.0f && io.NavInputs[NAV_NO] < vn) io.NavInputs[NAV_NO] = vn; } MAP_BUTTON(ImGuiNavInput_Activate, XINPUT_GAMEPAD_A); // Cross / A MAP_BUTTON(ImGuiNavInput_Cancel, XINPUT_GAMEPAD_B); // Circle / B MAP_BUTTON(ImGuiNavInput_Menu, XINPUT_GAMEPAD_X); // Square / X MAP_BUTTON(ImGuiNavInput_Input, XINPUT_GAMEPAD_Y); // Triangle / Y MAP_BUTTON(ImGuiNavInput_DpadLeft, XINPUT_GAMEPAD_DPAD_LEFT); // D-Pad Left MAP_BUTTON(ImGuiNavInput_DpadRight, XINPUT_GAMEPAD_DPAD_RIGHT); // D-Pad Right MAP_BUTTON(ImGuiNavInput_DpadUp, XINPUT_GAMEPAD_DPAD_UP); // D-Pad Up MAP_BUTTON(ImGuiNavInput_DpadDown, XINPUT_GAMEPAD_DPAD_DOWN); // D-Pad Down MAP_BUTTON(ImGuiNavInput_FocusPrev, XINPUT_GAMEPAD_LEFT_SHOULDER); // L1 / LB MAP_BUTTON(ImGuiNavInput_FocusNext, XINPUT_GAMEPAD_RIGHT_SHOULDER); // R1 / RB MAP_BUTTON(ImGuiNavInput_TweakSlow, XINPUT_GAMEPAD_LEFT_SHOULDER); // L1 / LB MAP_BUTTON(ImGuiNavInput_TweakFast, XINPUT_GAMEPAD_RIGHT_SHOULDER); // R1 / RB MAP_ANALOG(ImGuiNavInput_LStickLeft, gamepad.sThumbLX, -XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, -32768); MAP_ANALOG(ImGuiNavInput_LStickRight, gamepad.sThumbLX, +XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, +32767); MAP_ANALOG(ImGuiNavInput_LStickUp, gamepad.sThumbLY, +XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, +32767); MAP_ANALOG(ImGuiNavInput_LStickDown, gamepad.sThumbLY, -XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, -32767); #undef MAP_BUTTON #undef MAP_ANALOG } #endif // #ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD } static BOOL CALLBACK ImGui_ImplWin32_UpdateMonitors_EnumFunc(HMONITOR monitor, HDC, LPRECT, LPARAM) { MONITORINFO info = {}; info.cbSize = sizeof(MONITORINFO); if (!::GetMonitorInfo(monitor, &info)) return TRUE; ImGuiPlatformMonitor imgui_monitor; imgui_monitor.MainPos = ImVec2((float)info.rcMonitor.left, (float)info.rcMonitor.top); imgui_monitor.MainSize = ImVec2((float)(info.rcMonitor.right - info.rcMonitor.left), (float)(info.rcMonitor.bottom - info.rcMonitor.top)); imgui_monitor.WorkPos = ImVec2((float)info.rcWork.left, (float)info.rcWork.top); imgui_monitor.WorkSize = ImVec2((float)(info.rcWork.right - info.rcWork.left), (float)(info.rcWork.bottom - info.rcWork.top)); imgui_monitor.DpiScale = ImGui_ImplWin32_GetDpiScaleForMonitor(monitor); ImGuiPlatformIO& io = ImGui::GetPlatformIO(); if (info.dwFlags & MONITORINFOF_PRIMARY) io.Monitors.push_front(imgui_monitor); else io.Monitors.push_back(imgui_monitor); return TRUE; } static void ImGui_ImplWin32_UpdateMonitors() { ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData(); ImGui::GetPlatformIO().Monitors.resize(0); ::EnumDisplayMonitors(NULL, NULL, ImGui_ImplWin32_UpdateMonitors_EnumFunc, 0); bd->WantUpdateMonitors = false; } void ImGui_ImplWin32_NewFrame() { ImGuiIO& io = ImGui::GetIO(); ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData(); IM_ASSERT(bd != NULL && "Did you call ImGui_ImplWin32_Init()?"); // Setup display size (every frame to accommodate for window resizing) RECT rect = { 0, 0, 0, 0 }; ::GetClientRect(bd->hWnd, &rect); io.DisplaySize = ImVec2((float)(rect.right - rect.left), (float)(rect.bottom - rect.top)); if (bd->WantUpdateMonitors) ImGui_ImplWin32_UpdateMonitors(); // Setup time step INT64 current_time = 0; ::QueryPerformanceCounter((LARGE_INTEGER*)¤t_time); io.DeltaTime = (float)(current_time - bd->Time) / bd->TicksPerSecond; bd->Time = current_time; // Update OS mouse position ImGui_ImplWin32_UpdateMouseData(); // Process workarounds for known Windows key handling issues ImGui_ImplWin32_ProcessKeyEventsWorkarounds(); // Update OS mouse cursor with the cursor requested by imgui ImGuiMouseCursor mouse_cursor = io.MouseDrawCursor ? ImGuiMouseCursor_None : ImGui::GetMouseCursor(); if (bd->LastMouseCursor != mouse_cursor) { bd->LastMouseCursor = mouse_cursor; ImGui_ImplWin32_UpdateMouseCursor(); } // Update game controllers (if enabled and available) ImGui_ImplWin32_UpdateGamepads(); } // There is no distinct VK_xxx for keypad enter, instead it is VK_RETURN + KF_EXTENDED, we assign it an arbitrary value to make code more readable (VK_ codes go up to 255) #define IM_VK_KEYPAD_ENTER (VK_RETURN + 256) // Map VK_xxx to ImGuiKey_xxx. static ImGuiKey ImGui_ImplWin32_VirtualKeyToImGuiKey(WPARAM wParam) { switch (wParam) { case VK_TAB: return ImGuiKey_Tab; case VK_LEFT: return ImGuiKey_LeftArrow; case VK_RIGHT: return ImGuiKey_RightArrow; case VK_UP: return ImGuiKey_UpArrow; case VK_DOWN: return ImGuiKey_DownArrow; case VK_PRIOR: return ImGuiKey_PageUp; case VK_NEXT: return ImGuiKey_PageDown; case VK_HOME: return ImGuiKey_Home; case VK_END: return ImGuiKey_End; case VK_INSERT: return ImGuiKey_Insert; case VK_DELETE: return ImGuiKey_Delete; case VK_BACK: return ImGuiKey_Backspace; case VK_SPACE: return ImGuiKey_Space; case VK_RETURN: return ImGuiKey_Enter; case VK_ESCAPE: return ImGuiKey_Escape; case VK_OEM_7: return ImGuiKey_Apostrophe; case VK_OEM_COMMA: return ImGuiKey_Comma; case VK_OEM_MINUS: return ImGuiKey_Minus; case VK_OEM_PERIOD: return ImGuiKey_Period; case VK_OEM_2: return ImGuiKey_Slash; case VK_OEM_1: return ImGuiKey_Semicolon; case VK_OEM_PLUS: return ImGuiKey_Equal; case VK_OEM_4: return ImGuiKey_LeftBracket; case VK_OEM_5: return ImGuiKey_Backslash; case VK_OEM_6: return ImGuiKey_RightBracket; case VK_OEM_3: return ImGuiKey_GraveAccent; case VK_CAPITAL: return ImGuiKey_CapsLock; case VK_SCROLL: return ImGuiKey_ScrollLock; case VK_NUMLOCK: return ImGuiKey_NumLock; case VK_SNAPSHOT: return ImGuiKey_PrintScreen; case VK_PAUSE: return ImGuiKey_Pause; case VK_NUMPAD0: return ImGuiKey_Keypad0; case VK_NUMPAD1: return ImGuiKey_Keypad1; case VK_NUMPAD2: return ImGuiKey_Keypad2; case VK_NUMPAD3: return ImGuiKey_Keypad3; case VK_NUMPAD4: return ImGuiKey_Keypad4; case VK_NUMPAD5: return ImGuiKey_Keypad5; case VK_NUMPAD6: return ImGuiKey_Keypad6; case VK_NUMPAD7: return ImGuiKey_Keypad7; case VK_NUMPAD8: return ImGuiKey_Keypad8; case VK_NUMPAD9: return ImGuiKey_Keypad9; case VK_DECIMAL: return ImGuiKey_KeypadDecimal; case VK_DIVIDE: return ImGuiKey_KeypadDivide; case VK_MULTIPLY: return ImGuiKey_KeypadMultiply; case VK_SUBTRACT: return ImGuiKey_KeypadSubtract; case VK_ADD: return ImGuiKey_KeypadAdd; case IM_VK_KEYPAD_ENTER: return ImGuiKey_KeypadEnter; case VK_LSHIFT: return ImGuiKey_LeftShift; case VK_LCONTROL: return ImGuiKey_LeftCtrl; case VK_LMENU: return ImGuiKey_LeftAlt; case VK_LWIN: return ImGuiKey_LeftSuper; case VK_RSHIFT: return ImGuiKey_RightShift; case VK_RCONTROL: return ImGuiKey_RightCtrl; case VK_RMENU: return ImGuiKey_RightAlt; case VK_RWIN: return ImGuiKey_RightSuper; case VK_APPS: return ImGuiKey_Menu; case '0': return ImGuiKey_0; case '1': return ImGuiKey_1; case '2': return ImGuiKey_2; case '3': return ImGuiKey_3; case '4': return ImGuiKey_4; case '5': return ImGuiKey_5; case '6': return ImGuiKey_6; case '7': return ImGuiKey_7; case '8': return ImGuiKey_8; case '9': return ImGuiKey_9; case 'A': return ImGuiKey_A; case 'B': return ImGuiKey_B; case 'C': return ImGuiKey_C; case 'D': return ImGuiKey_D; case 'E': return ImGuiKey_E; case 'F': return ImGuiKey_F; case 'G': return ImGuiKey_G; case 'H': return ImGuiKey_H; case 'I': return ImGuiKey_I; case 'J': return ImGuiKey_J; case 'K': return ImGuiKey_K; case 'L': return ImGuiKey_L; case 'M': return ImGuiKey_M; case 'N': return ImGuiKey_N; case 'O': return ImGuiKey_O; case 'P': return ImGuiKey_P; case 'Q': return ImGuiKey_Q; case 'R': return ImGuiKey_R; case 'S': return ImGuiKey_S; case 'T': return ImGuiKey_T; case 'U': return ImGuiKey_U; case 'V': return ImGuiKey_V; case 'W': return ImGuiKey_W; case 'X': return ImGuiKey_X; case 'Y': return ImGuiKey_Y; case 'Z': return ImGuiKey_Z; case VK_F1: return ImGuiKey_F1; case VK_F2: return ImGuiKey_F2; case VK_F3: return ImGuiKey_F3; case VK_F4: return ImGuiKey_F4; case VK_F5: return ImGuiKey_F5; case VK_F6: return ImGuiKey_F6; case VK_F7: return ImGuiKey_F7; case VK_F8: return ImGuiKey_F8; case VK_F9: return ImGuiKey_F9; case VK_F10: return ImGuiKey_F10; case VK_F11: return ImGuiKey_F11; case VK_F12: return ImGuiKey_F12; default: return ImGuiKey_None; } } // Allow compilation with old Windows SDK. MinGW doesn't have default _WIN32_WINNT/WINVER versions. #ifndef WM_MOUSEHWHEEL #define WM_MOUSEHWHEEL 0x020E #endif #ifndef DBT_DEVNODES_CHANGED #define DBT_DEVNODES_CHANGED 0x0007 #endif // Win32 message handler (process Win32 mouse/keyboard inputs, etc.) // Call from your application's message handler. // When implementing your own backend, you can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if Dear ImGui wants to use your inputs. // - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application. // - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application. // Generally you may always pass all inputs to Dear ImGui, and hide them from your application based on those two flags. // PS: In this Win32 handler, we use the capture API (GetCapture/SetCapture/ReleaseCapture) to be able to read mouse coordinates when dragging mouse outside of our window bounds. // PS: We treat DBLCLK messages as regular mouse down messages, so this code will work on windows classes that have the CS_DBLCLKS flag set. Our own example app code doesn't set this flag. #if 0 // Copy this line into your .cpp file to forward declare the function. extern IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam); #endif IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) { if (ImGui::GetCurrentContext() == NULL) return 0; ImGuiIO& io = ImGui::GetIO(); ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData(); switch (msg) { case WM_MOUSEMOVE: { // We need to call TrackMouseEvent in order to receive WM_MOUSELEAVE events bd->MouseHwnd = hwnd; if (!bd->MouseTracked) { TRACKMOUSEEVENT tme = { sizeof(tme), TME_LEAVE, hwnd, 0 }; ::TrackMouseEvent(&tme); bd->MouseTracked = true; } POINT mouse_pos = { (LONG)GET_X_LPARAM(lParam), (LONG)GET_Y_LPARAM(lParam) }; if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable) ::ClientToScreen(hwnd, &mouse_pos); io.AddMousePosEvent((float)mouse_pos.x, (float)mouse_pos.y); break; } case WM_MOUSELEAVE: if (bd->MouseHwnd == hwnd) bd->MouseHwnd = NULL; bd->MouseTracked = false; io.AddMousePosEvent(-FLT_MAX, -FLT_MAX); break; case WM_LBUTTONDOWN: case WM_LBUTTONDBLCLK: case WM_RBUTTONDOWN: case WM_RBUTTONDBLCLK: case WM_MBUTTONDOWN: case WM_MBUTTONDBLCLK: case WM_XBUTTONDOWN: case WM_XBUTTONDBLCLK: { int button = 0; if (msg == WM_LBUTTONDOWN || msg == WM_LBUTTONDBLCLK) { button = 0; } if (msg == WM_RBUTTONDOWN || msg == WM_RBUTTONDBLCLK) { button = 1; } if (msg == WM_MBUTTONDOWN || msg == WM_MBUTTONDBLCLK) { button = 2; } if (msg == WM_XBUTTONDOWN || msg == WM_XBUTTONDBLCLK) { button = (GET_XBUTTON_WPARAM(wParam) == XBUTTON1) ? 3 : 4; } if (bd->MouseButtonsDown == 0 && ::GetCapture() == NULL) ::SetCapture(hwnd); bd->MouseButtonsDown |= 1 << button; io.AddMouseButtonEvent(button, true); return 0; } case WM_LBUTTONUP: case WM_RBUTTONUP: case WM_MBUTTONUP: case WM_XBUTTONUP: { int button = 0; if (msg == WM_LBUTTONUP) { button = 0; } if (msg == WM_RBUTTONUP) { button = 1; } if (msg == WM_MBUTTONUP) { button = 2; } if (msg == WM_XBUTTONUP) { button = (GET_XBUTTON_WPARAM(wParam) == XBUTTON1) ? 3 : 4; } bd->MouseButtonsDown &= ~(1 << button); if (bd->MouseButtonsDown == 0 && ::GetCapture() == hwnd) ::ReleaseCapture(); io.AddMouseButtonEvent(button, false); return 0; } case WM_MOUSEWHEEL: io.AddMouseWheelEvent(0.0f, (float)GET_WHEEL_DELTA_WPARAM(wParam) / (float)WHEEL_DELTA); return 0; case WM_MOUSEHWHEEL: io.AddMouseWheelEvent((float)GET_WHEEL_DELTA_WPARAM(wParam) / (float)WHEEL_DELTA, 0.0f); return 0; case WM_KEYDOWN: case WM_KEYUP: case WM_SYSKEYDOWN: case WM_SYSKEYUP: { const bool is_key_down = (msg == WM_KEYDOWN || msg == WM_SYSKEYDOWN); if (wParam < 256) { // Submit modifiers ImGui_ImplWin32_UpdateKeyModifiers(); // Obtain virtual key code // (keypad enter doesn't have its own... VK_RETURN with KF_EXTENDED flag means keypad enter, see IM_VK_KEYPAD_ENTER definition for details, it is mapped to ImGuiKey_KeyPadEnter.) int vk = (int)wParam; if ((wParam == VK_RETURN) && (HIWORD(lParam) & KF_EXTENDED)) vk = IM_VK_KEYPAD_ENTER; // Submit key event const ImGuiKey key = ImGui_ImplWin32_VirtualKeyToImGuiKey(vk); const int scancode = (int)LOBYTE(HIWORD(lParam)); if (key != ImGuiKey_None) ImGui_ImplWin32_AddKeyEvent(key, is_key_down, vk, scancode); // Submit individual left/right modifier events if (vk == VK_SHIFT) { // Important: Shift keys tend to get stuck when pressed together, missing key-up events are corrected in ImGui_ImplWin32_ProcessKeyEventsWorkarounds() if (IsVkDown(VK_LSHIFT) == is_key_down) { ImGui_ImplWin32_AddKeyEvent(ImGuiKey_LeftShift, is_key_down, VK_LSHIFT, scancode); } if (IsVkDown(VK_RSHIFT) == is_key_down) { ImGui_ImplWin32_AddKeyEvent(ImGuiKey_RightShift, is_key_down, VK_RSHIFT, scancode); } } else if (vk == VK_CONTROL) { if (IsVkDown(VK_LCONTROL) == is_key_down) { ImGui_ImplWin32_AddKeyEvent(ImGuiKey_LeftCtrl, is_key_down, VK_LCONTROL, scancode); } if (IsVkDown(VK_RCONTROL) == is_key_down) { ImGui_ImplWin32_AddKeyEvent(ImGuiKey_RightCtrl, is_key_down, VK_RCONTROL, scancode); } } else if (vk == VK_MENU) { if (IsVkDown(VK_LMENU) == is_key_down) { ImGui_ImplWin32_AddKeyEvent(ImGuiKey_LeftAlt, is_key_down, VK_LMENU, scancode); } if (IsVkDown(VK_RMENU) == is_key_down) { ImGui_ImplWin32_AddKeyEvent(ImGuiKey_RightAlt, is_key_down, VK_RMENU, scancode); } } } return 0; } case WM_SETFOCUS: case WM_KILLFOCUS: io.AddFocusEvent(msg == WM_SETFOCUS); return 0; case WM_CHAR: // You can also use ToAscii()+GetKeyboardState() to retrieve characters. if (wParam > 0 && wParam < 0x10000) io.AddInputCharacterUTF16((unsigned short)wParam); return 0; case WM_SETCURSOR: if (LOWORD(lParam) == HTCLIENT && ImGui_ImplWin32_UpdateMouseCursor()) return 1; return 0; case WM_DEVICECHANGE: if ((UINT)wParam == DBT_DEVNODES_CHANGED) bd->WantUpdateHasGamepad = true; return 0; case WM_DISPLAYCHANGE: bd->WantUpdateMonitors = true; return 0; } return 0; } //-------------------------------------------------------------------------------------------------------- // DPI-related helpers (optional) //-------------------------------------------------------------------------------------------------------- // - Use to enable DPI awareness without having to create an application manifest. // - Your own app may already do this via a manifest or explicit calls. This is mostly useful for our examples/ apps. // - In theory we could call simple functions from Windows SDK such as SetProcessDPIAware(), SetProcessDpiAwareness(), etc. // but most of the functions provided by Microsoft require Windows 8.1/10+ SDK at compile time and Windows 8/10+ at runtime, // neither we want to require the user to have. So we dynamically select and load those functions to avoid dependencies. //--------------------------------------------------------------------------------------------------------- // This is the scheme successfully used by GLFW (from which we borrowed some of the code) and other apps aiming to be highly portable. // ImGui_ImplWin32_EnableDpiAwareness() is just a helper called by main.cpp, we don't call it automatically. // If you are trying to implement your own backend for your own engine, you may ignore that noise. //--------------------------------------------------------------------------------------------------------- // Perform our own check with RtlVerifyVersionInfo() instead of using functions from as they // require a manifest to be functional for checks above 8.1. See https://github.com/ocornut/imgui/issues/4200 static BOOL _IsWindowsVersionOrGreater(WORD major, WORD minor, WORD) { typedef LONG(WINAPI* PFN_RtlVerifyVersionInfo)(OSVERSIONINFOEXW*, ULONG, ULONGLONG); static PFN_RtlVerifyVersionInfo RtlVerifyVersionInfoFn = NULL; if (RtlVerifyVersionInfoFn == NULL) if (HMODULE ntdllModule = ::GetModuleHandleA("ntdll.dll")) RtlVerifyVersionInfoFn = (PFN_RtlVerifyVersionInfo)GetProcAddress(ntdllModule, "RtlVerifyVersionInfo"); if (RtlVerifyVersionInfoFn == NULL) return FALSE; RTL_OSVERSIONINFOEXW versionInfo = { }; ULONGLONG conditionMask = 0; versionInfo.dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOEXW); versionInfo.dwMajorVersion = major; versionInfo.dwMinorVersion = minor; VER_SET_CONDITION(conditionMask, VER_MAJORVERSION, VER_GREATER_EQUAL); VER_SET_CONDITION(conditionMask, VER_MINORVERSION, VER_GREATER_EQUAL); return (RtlVerifyVersionInfoFn(&versionInfo, VER_MAJORVERSION | VER_MINORVERSION, conditionMask) == 0) ? TRUE : FALSE; } #define _IsWindowsVistaOrGreater() _IsWindowsVersionOrGreater(HIBYTE(0x0600), LOBYTE(0x0600), 0) // _WIN32_WINNT_VISTA #define _IsWindows8OrGreater() _IsWindowsVersionOrGreater(HIBYTE(0x0602), LOBYTE(0x0602), 0) // _WIN32_WINNT_WIN8 #define _IsWindows8Point1OrGreater() _IsWindowsVersionOrGreater(HIBYTE(0x0603), LOBYTE(0x0603), 0) // _WIN32_WINNT_WINBLUE #define _IsWindows10OrGreater() _IsWindowsVersionOrGreater(HIBYTE(0x0A00), LOBYTE(0x0A00), 0) // _WIN32_WINNT_WINTHRESHOLD / _WIN32_WINNT_WIN10 #ifndef DPI_ENUMS_DECLARED typedef enum { PROCESS_DPI_UNAWARE = 0, PROCESS_SYSTEM_DPI_AWARE = 1, PROCESS_PER_MONITOR_DPI_AWARE = 2 } PROCESS_DPI_AWARENESS; typedef enum { MDT_EFFECTIVE_DPI = 0, MDT_ANGULAR_DPI = 1, MDT_RAW_DPI = 2, MDT_DEFAULT = MDT_EFFECTIVE_DPI } MONITOR_DPI_TYPE; #endif #ifndef _DPI_AWARENESS_CONTEXTS_ DECLARE_HANDLE(DPI_AWARENESS_CONTEXT); #define DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE (DPI_AWARENESS_CONTEXT)-3 #endif #ifndef DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2 #define DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2 (DPI_AWARENESS_CONTEXT)-4 #endif typedef HRESULT(WINAPI* PFN_SetProcessDpiAwareness)(PROCESS_DPI_AWARENESS); // Shcore.lib + dll, Windows 8.1+ typedef HRESULT(WINAPI* PFN_GetDpiForMonitor)(HMONITOR, MONITOR_DPI_TYPE, UINT*, UINT*); // Shcore.lib + dll, Windows 8.1+ typedef DPI_AWARENESS_CONTEXT(WINAPI* PFN_SetThreadDpiAwarenessContext)(DPI_AWARENESS_CONTEXT); // User32.lib + dll, Windows 10 v1607+ (Creators Update) // Helper function to enable DPI awareness without setting up a manifest void ImGui_ImplWin32_EnableDpiAwareness() { // Make sure monitors will be updated with latest correct scaling if (ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData()) bd->WantUpdateMonitors = true; if (_IsWindows10OrGreater()) { static HINSTANCE user32_dll = ::LoadLibraryA("user32.dll"); // Reference counted per-process if (PFN_SetThreadDpiAwarenessContext SetThreadDpiAwarenessContextFn = (PFN_SetThreadDpiAwarenessContext)::GetProcAddress(user32_dll, "SetThreadDpiAwarenessContext")) { SetThreadDpiAwarenessContextFn(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2); return; } } if (_IsWindows8Point1OrGreater()) { static HINSTANCE shcore_dll = ::LoadLibraryA("shcore.dll"); // Reference counted per-process if (PFN_SetProcessDpiAwareness SetProcessDpiAwarenessFn = (PFN_SetProcessDpiAwareness)::GetProcAddress(shcore_dll, "SetProcessDpiAwareness")) { SetProcessDpiAwarenessFn(PROCESS_PER_MONITOR_DPI_AWARE); return; } } #if _WIN32_WINNT >= 0x0600 ::SetProcessDPIAware(); #endif } #if defined(_MSC_VER) && !defined(NOGDI) #pragma comment(lib, "gdi32") // Link with gdi32.lib for GetDeviceCaps(). MinGW will require linking with '-lgdi32' #endif float ImGui_ImplWin32_GetDpiScaleForMonitor(void* monitor) { UINT xdpi = 96, ydpi = 96; if (_IsWindows8Point1OrGreater()) { static HINSTANCE shcore_dll = ::LoadLibraryA("shcore.dll"); // Reference counted per-process static PFN_GetDpiForMonitor GetDpiForMonitorFn = NULL; if (GetDpiForMonitorFn == NULL && shcore_dll != NULL) GetDpiForMonitorFn = (PFN_GetDpiForMonitor)::GetProcAddress(shcore_dll, "GetDpiForMonitor"); if (GetDpiForMonitorFn != NULL) { GetDpiForMonitorFn((HMONITOR)monitor, MDT_EFFECTIVE_DPI, &xdpi, &ydpi); IM_ASSERT(xdpi == ydpi); // Please contact me if you hit this assert! return xdpi / 96.0f; } } #ifndef NOGDI const HDC dc = ::GetDC(NULL); xdpi = ::GetDeviceCaps(dc, LOGPIXELSX); ydpi = ::GetDeviceCaps(dc, LOGPIXELSY); IM_ASSERT(xdpi == ydpi); // Please contact me if you hit this assert! ::ReleaseDC(NULL, dc); #endif return xdpi / 96.0f; } float ImGui_ImplWin32_GetDpiScaleForHwnd(void* hwnd) { HMONITOR monitor = ::MonitorFromWindow((HWND)hwnd, MONITOR_DEFAULTTONEAREST); return ImGui_ImplWin32_GetDpiScaleForMonitor(monitor); } //-------------------------------------------------------------------------------------------------------- // MULTI-VIEWPORT / PLATFORM INTERFACE SUPPORT // This is an _advanced_ and _optional_ feature, allowing the backend to create and handle multiple viewports simultaneously. // If you are new to dear imgui or creating a new binding for dear imgui, it is recommended that you completely ignore this section first.. //-------------------------------------------------------------------------------------------------------- // Helper structure we store in the void* RenderUserData field of each ImGuiViewport to easily retrieve our backend data. struct ImGui_ImplWin32_ViewportData { HWND Hwnd; bool HwndOwned; DWORD DwStyle; DWORD DwExStyle; ImGui_ImplWin32_ViewportData() { Hwnd = NULL; HwndOwned = false; DwStyle = DwExStyle = 0; } ~ImGui_ImplWin32_ViewportData() { IM_ASSERT(Hwnd == NULL); } }; static void ImGui_ImplWin32_GetWin32StyleFromViewportFlags(ImGuiViewportFlags flags, DWORD* out_style, DWORD* out_ex_style) { if (flags & ImGuiViewportFlags_NoDecoration) *out_style = WS_POPUP; else *out_style = WS_OVERLAPPEDWINDOW; if (flags & ImGuiViewportFlags_NoTaskBarIcon) *out_ex_style = WS_EX_TOOLWINDOW; else *out_ex_style = WS_EX_APPWINDOW; if (flags & ImGuiViewportFlags_TopMost) *out_ex_style |= WS_EX_TOPMOST; } static void ImGui_ImplWin32_CreateWindow(ImGuiViewport* viewport) { ImGui_ImplWin32_ViewportData* vd = IM_NEW(ImGui_ImplWin32_ViewportData)(); viewport->PlatformUserData = vd; // Select style and parent window ImGui_ImplWin32_GetWin32StyleFromViewportFlags(viewport->Flags, &vd->DwStyle, &vd->DwExStyle); HWND parent_window = NULL; if (viewport->ParentViewportId != 0) if (ImGuiViewport* parent_viewport = ImGui::FindViewportByID(viewport->ParentViewportId)) parent_window = (HWND)parent_viewport->PlatformHandle; // Create window RECT rect = { (LONG)viewport->Pos.x, (LONG)viewport->Pos.y, (LONG)(viewport->Pos.x + viewport->Size.x), (LONG)(viewport->Pos.y + viewport->Size.y) }; ::AdjustWindowRectEx(&rect, vd->DwStyle, FALSE, vd->DwExStyle); vd->Hwnd = ::CreateWindowEx( vd->DwExStyle, _T("ImGui Platform"), _T("Untitled"), vd->DwStyle, // Style, class name, window name rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, // Window area parent_window, NULL, ::GetModuleHandle(NULL), NULL); // Parent window, Menu, Instance, Param vd->HwndOwned = true; viewport->PlatformRequestResize = false; viewport->PlatformHandle = viewport->PlatformHandleRaw = vd->Hwnd; } static void ImGui_ImplWin32_DestroyWindow(ImGuiViewport* viewport) { ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData(); if (ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData) { if (::GetCapture() == vd->Hwnd) { // Transfer capture so if we started dragging from a window that later disappears, we'll still receive the MOUSEUP event. ::ReleaseCapture(); ::SetCapture(bd->hWnd); } if (vd->Hwnd && vd->HwndOwned) ::DestroyWindow(vd->Hwnd); vd->Hwnd = NULL; IM_DELETE(vd); } viewport->PlatformUserData = viewport->PlatformHandle = NULL; } static void ImGui_ImplWin32_ShowWindow(ImGuiViewport* viewport) { ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData; IM_ASSERT(vd->Hwnd != 0); if (viewport->Flags & ImGuiViewportFlags_NoFocusOnAppearing) ::ShowWindow(vd->Hwnd, SW_SHOWNA); else ::ShowWindow(vd->Hwnd, SW_SHOW); } static void ImGui_ImplWin32_UpdateWindow(ImGuiViewport* viewport) { // (Optional) Update Win32 style if it changed _after_ creation. // Generally they won't change unless configuration flags are changed, but advanced uses (such as manually rewriting viewport flags) make this useful. ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData; IM_ASSERT(vd->Hwnd != 0); DWORD new_style; DWORD new_ex_style; ImGui_ImplWin32_GetWin32StyleFromViewportFlags(viewport->Flags, &new_style, &new_ex_style); // Only reapply the flags that have been changed from our point of view (as other flags are being modified by Windows) if (vd->DwStyle != new_style || vd->DwExStyle != new_ex_style) { // (Optional) Update TopMost state if it changed _after_ creation bool top_most_changed = (vd->DwExStyle & WS_EX_TOPMOST) != (new_ex_style & WS_EX_TOPMOST); HWND insert_after = top_most_changed ? ((viewport->Flags & ImGuiViewportFlags_TopMost) ? HWND_TOPMOST : HWND_NOTOPMOST) : 0; UINT swp_flag = top_most_changed ? 0 : SWP_NOZORDER; // Apply flags and position (since it is affected by flags) vd->DwStyle = new_style; vd->DwExStyle = new_ex_style; ::SetWindowLong(vd->Hwnd, GWL_STYLE, vd->DwStyle); ::SetWindowLong(vd->Hwnd, GWL_EXSTYLE, vd->DwExStyle); RECT rect = { (LONG)viewport->Pos.x, (LONG)viewport->Pos.y, (LONG)(viewport->Pos.x + viewport->Size.x), (LONG)(viewport->Pos.y + viewport->Size.y) }; ::AdjustWindowRectEx(&rect, vd->DwStyle, FALSE, vd->DwExStyle); // Client to Screen ::SetWindowPos(vd->Hwnd, insert_after, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, swp_flag | SWP_NOACTIVATE | SWP_FRAMECHANGED); ::ShowWindow(vd->Hwnd, SW_SHOWNA); // This is necessary when we alter the style viewport->PlatformRequestMove = viewport->PlatformRequestResize = true; } } static ImVec2 ImGui_ImplWin32_GetWindowPos(ImGuiViewport* viewport) { ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData; IM_ASSERT(vd->Hwnd != 0); POINT pos = { 0, 0 }; ::ClientToScreen(vd->Hwnd, &pos); return ImVec2((float)pos.x, (float)pos.y); } static void ImGui_ImplWin32_SetWindowPos(ImGuiViewport* viewport, ImVec2 pos) { ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData; IM_ASSERT(vd->Hwnd != 0); RECT rect = { (LONG)pos.x, (LONG)pos.y, (LONG)pos.x, (LONG)pos.y }; ::AdjustWindowRectEx(&rect, vd->DwStyle, FALSE, vd->DwExStyle); ::SetWindowPos(vd->Hwnd, NULL, rect.left, rect.top, 0, 0, SWP_NOZORDER | SWP_NOSIZE | SWP_NOACTIVATE); } static ImVec2 ImGui_ImplWin32_GetWindowSize(ImGuiViewport* viewport) { ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData; IM_ASSERT(vd->Hwnd != 0); RECT rect; ::GetClientRect(vd->Hwnd, &rect); return ImVec2(float(rect.right - rect.left), float(rect.bottom - rect.top)); } static void ImGui_ImplWin32_SetWindowSize(ImGuiViewport* viewport, ImVec2 size) { ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData; IM_ASSERT(vd->Hwnd != 0); RECT rect = { 0, 0, (LONG)size.x, (LONG)size.y }; ::AdjustWindowRectEx(&rect, vd->DwStyle, FALSE, vd->DwExStyle); // Client to Screen ::SetWindowPos(vd->Hwnd, NULL, 0, 0, rect.right - rect.left, rect.bottom - rect.top, SWP_NOZORDER | SWP_NOMOVE | SWP_NOACTIVATE); } static void ImGui_ImplWin32_SetWindowFocus(ImGuiViewport* viewport) { ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData; IM_ASSERT(vd->Hwnd != 0); ::BringWindowToTop(vd->Hwnd); ::SetForegroundWindow(vd->Hwnd); ::SetFocus(vd->Hwnd); } static bool ImGui_ImplWin32_GetWindowFocus(ImGuiViewport* viewport) { ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData; IM_ASSERT(vd->Hwnd != 0); return ::GetForegroundWindow() == vd->Hwnd; } static bool ImGui_ImplWin32_GetWindowMinimized(ImGuiViewport* viewport) { ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData; IM_ASSERT(vd->Hwnd != 0); return ::IsIconic(vd->Hwnd) != 0; } static void ImGui_ImplWin32_SetWindowTitle(ImGuiViewport* viewport, const char* title) { // ::SetWindowTextA() doesn't properly handle UTF-8 so we explicitely convert our string. ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData; IM_ASSERT(vd->Hwnd != 0); int n = ::MultiByteToWideChar(CP_UTF8, 0, title, -1, NULL, 0); ImVector title_w; title_w.resize(n); ::MultiByteToWideChar(CP_UTF8, 0, title, -1, title_w.Data, n); ::SetWindowTextW(vd->Hwnd, title_w.Data); } static void ImGui_ImplWin32_SetWindowAlpha(ImGuiViewport* viewport, float alpha) { ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData; IM_ASSERT(vd->Hwnd != 0); IM_ASSERT(alpha >= 0.0f && alpha <= 1.0f); if (alpha < 1.0f) { DWORD style = ::GetWindowLongW(vd->Hwnd, GWL_EXSTYLE) | WS_EX_LAYERED; ::SetWindowLongW(vd->Hwnd, GWL_EXSTYLE, style); ::SetLayeredWindowAttributes(vd->Hwnd, 0, (BYTE)(255 * alpha), LWA_ALPHA); } else { DWORD style = ::GetWindowLongW(vd->Hwnd, GWL_EXSTYLE) & ~WS_EX_LAYERED; ::SetWindowLongW(vd->Hwnd, GWL_EXSTYLE, style); } } static float ImGui_ImplWin32_GetWindowDpiScale(ImGuiViewport* viewport) { ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData; IM_ASSERT(vd->Hwnd != 0); return ImGui_ImplWin32_GetDpiScaleForHwnd(vd->Hwnd); } // FIXME-DPI: Testing DPI related ideas static void ImGui_ImplWin32_OnChangedViewport(ImGuiViewport* viewport) { (void)viewport; #if 0 ImGuiStyle default_style; //default_style.WindowPadding = ImVec2(0, 0); //default_style.WindowBorderSize = 0.0f; //default_style.ItemSpacing.y = 3.0f; //default_style.FramePadding = ImVec2(0, 0); default_style.ScaleAllSizes(viewport->DpiScale); ImGuiStyle& style = ImGui::GetStyle(); style = default_style; #endif } static LRESULT CALLBACK ImGui_ImplWin32_WndProcHandler_PlatformWindow(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) { if (ImGui_ImplWin32_WndProcHandler(hWnd, msg, wParam, lParam)) return true; if (ImGuiViewport* viewport = ImGui::FindViewportByPlatformHandle((void*)hWnd)) { switch (msg) { case WM_CLOSE: viewport->PlatformRequestClose = true; return 0; case WM_MOVE: viewport->PlatformRequestMove = true; break; case WM_SIZE: viewport->PlatformRequestResize = true; break; case WM_MOUSEACTIVATE: if (viewport->Flags & ImGuiViewportFlags_NoFocusOnClick) return MA_NOACTIVATE; break; case WM_NCHITTEST: // Let mouse pass-through the window. This will allow the backend to set io.MouseHoveredViewport properly (which is OPTIONAL). // The ImGuiViewportFlags_NoInputs flag is set while dragging a viewport, as want to detect the window behind the one we are dragging. // If you cannot easily access those viewport flags from your windowing/event code: you may manually synchronize its state e.g. in // your main loop after calling UpdatePlatformWindows(). Iterate all viewports/platform windows and pass the flag to your windowing system. if (viewport->Flags & ImGuiViewportFlags_NoInputs) return HTTRANSPARENT; break; } } return DefWindowProc(hWnd, msg, wParam, lParam); } static void ImGui_ImplWin32_InitPlatformInterface() { WNDCLASSEX wcex; wcex.cbSize = sizeof(WNDCLASSEX); wcex.style = CS_HREDRAW | CS_VREDRAW; wcex.lpfnWndProc = ImGui_ImplWin32_WndProcHandler_PlatformWindow; wcex.cbClsExtra = 0; wcex.cbWndExtra = 0; wcex.hInstance = ::GetModuleHandle(NULL); wcex.hIcon = NULL; wcex.hCursor = NULL; wcex.hbrBackground = (HBRUSH)(COLOR_BACKGROUND + 1); wcex.lpszMenuName = NULL; wcex.lpszClassName = _T("ImGui Platform"); wcex.hIconSm = NULL; ::RegisterClassEx(&wcex); ImGui_ImplWin32_UpdateMonitors(); // Register platform interface (will be coupled with a renderer interface) ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO(); platform_io.Platform_CreateWindow = ImGui_ImplWin32_CreateWindow; platform_io.Platform_DestroyWindow = ImGui_ImplWin32_DestroyWindow; platform_io.Platform_ShowWindow = ImGui_ImplWin32_ShowWindow; platform_io.Platform_SetWindowPos = ImGui_ImplWin32_SetWindowPos; platform_io.Platform_GetWindowPos = ImGui_ImplWin32_GetWindowPos; platform_io.Platform_SetWindowSize = ImGui_ImplWin32_SetWindowSize; platform_io.Platform_GetWindowSize = ImGui_ImplWin32_GetWindowSize; platform_io.Platform_SetWindowFocus = ImGui_ImplWin32_SetWindowFocus; platform_io.Platform_GetWindowFocus = ImGui_ImplWin32_GetWindowFocus; platform_io.Platform_GetWindowMinimized = ImGui_ImplWin32_GetWindowMinimized; platform_io.Platform_SetWindowTitle = ImGui_ImplWin32_SetWindowTitle; platform_io.Platform_SetWindowAlpha = ImGui_ImplWin32_SetWindowAlpha; platform_io.Platform_UpdateWindow = ImGui_ImplWin32_UpdateWindow; platform_io.Platform_GetWindowDpiScale = ImGui_ImplWin32_GetWindowDpiScale; // FIXME-DPI platform_io.Platform_OnChangedViewport = ImGui_ImplWin32_OnChangedViewport; // FIXME-DPI // Register main window handle (which is owned by the main application, not by us) // This is mostly for simplicity and consistency, so that our code (e.g. mouse handling etc.) can use same logic for main and secondary viewports. ImGuiViewport* main_viewport = ImGui::GetMainViewport(); ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData(); ImGui_ImplWin32_ViewportData* vd = IM_NEW(ImGui_ImplWin32_ViewportData)(); vd->Hwnd = bd->hWnd; vd->HwndOwned = false; main_viewport->PlatformUserData = vd; main_viewport->PlatformHandle = (void*)bd->hWnd; } static void ImGui_ImplWin32_ShutdownPlatformInterface() { ::UnregisterClass(_T("ImGui Platform"), ::GetModuleHandle(NULL)); ImGui::DestroyPlatformWindows(); } //--------------------------------------------------------------------------------------------------------- // Transparency related helpers (optional) //-------------------------------------------------------------------------------------------------------- #if defined(_MSC_VER) #pragma comment(lib, "dwmapi") // Link with dwmapi.lib. MinGW will require linking with '-ldwmapi' #endif // [experimental] // Borrowed from GLFW's function updateFramebufferTransparency() in src/win32_window.c // (the Dwm* functions are Vista era functions but we are borrowing logic from GLFW) void ImGui_ImplWin32_EnableAlphaCompositing(void* hwnd) { if (!_IsWindowsVistaOrGreater()) return; BOOL composition; if (FAILED(::DwmIsCompositionEnabled(&composition)) || !composition) return; BOOL opaque; DWORD color; if (_IsWindows8OrGreater() || (SUCCEEDED(::DwmGetColorizationColor(&color, &opaque)) && !opaque)) { HRGN region = ::CreateRectRgn(0, 0, -1, -1); DWM_BLURBEHIND bb = {}; bb.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION; bb.hRgnBlur = region; bb.fEnable = TRUE; ::DwmEnableBlurBehindWindow((HWND)hwnd, &bb); ::DeleteObject(region); } else { DWM_BLURBEHIND bb = {}; bb.dwFlags = DWM_BB_ENABLE; ::DwmEnableBlurBehindWindow((HWND)hwnd, &bb); } } //---------------------------------------------------------------------------------------------------------