| // dear imgui: Platform Backend for Windows (standard windows API for 32-bits 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: Mouse support. Can discriminate Mouse/TouchScreen/Pen. |
| // [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 <windows.h> |
| #include <windowsx.h> // GET_X_LPARAM(), GET_Y_LPARAM() |
| #include <tchar.h> |
| #include <dwmapi.h> |
| |
| // Stuff for loading WGL functions explicitly |
| static HGLRC (WINAPI* _wglCreateContext)(HDC); |
| static BOOL (WINAPI* _wglDeleteContext)(HGLRC); |
| static BOOL (WINAPI* _wglMakeCurrent)(HDC, HGLRC); |
| static BOOL (WINAPI* _wglShareLists)(HGLRC, HGLRC); |
| static HGLRC (WINAPI* _wglGetCurrentContext)(VOID); |
| static HDC (WINAPI* _wglGetCurrentDC)(VOID); |
| |
| // 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 <xinput.h> |
| 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) |
| // 2023-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface. |
| // 2023-04-04: Inputs: Added support for io.AddMouseSourceEvent() to discriminate ImGuiMouseSource_Mouse/ImGuiMouseSource_TouchScreen/ImGuiMouseSource_Pen. (#2702) |
| // 2023-02-15: Inputs: Use WM_NCMOUSEMOVE / WM_NCMOUSELEAVE to track mouse position over non-client area (e.g. OS decorations) when app is not focused. (#6045, #6162) |
| // 2023-02-02: Inputs: Flipping WM_MOUSEHWHEEL (horizontal mouse-wheel) value to match other backends and offer consistent horizontal scrolling direction. (#4019, #6096, #1463) |
| // 2022-10-11: Using 'nullptr' instead of 'NULL' as per our switch to C++11. |
| // 2022-09-28: Inputs: Convert WM_CHAR values with MultiByteToWideChar() when window class was registered as MBCS (not Unicode). |
| // 2022-09-26: Inputs: Renamed ImGuiKey_ModXXX introduced in 1.87 to ImGuiMod_XXX (old names still supported). |
| // 2022-01-26: Inputs: replaced short-lived io.AddKeyModsEvent() (added two weeks ago) with io.AddKeyEvent() using ImGuiKey_ModXXX flags. Sorry for the confusion. |
| // 2021-01-20: Inputs: calling new io.AddKeyAnalogEvent() for gamepad support, instead of writing directly to io.NavInputs[]. |
| // 2022-01-17: Inputs: calling new io.AddMousePosEvent(), io.AddMouseButtonEvent(), io.AddMouseWheelEvent() API (1.87+). |
| // 2022-01-17: Inputs: always update key mods 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(nullptr) 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; |
| HGLRC OpenGlContext; |
| HWND MouseHwnd; |
| int MouseTrackedArea; // 0: not tracked, 1: client are, 2: non-client area |
| int MouseButtonsDown; |
| INT64 Time; |
| INT64 TicksPerSecond; |
| ImGuiMouseCursor LastMouseCursor; |
| bool WantUpdateMonitors; |
| |
| // OpenGL |
| HMODULE OglDLL; |
| HDC stashedDeviceContext; |
| HGLRC stashedOpenGlContext; |
| |
| #ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD |
| bool HasGamepad; |
| bool WantUpdateHasGamepad; |
| HMODULE XInputDLL; |
| PFN_XInputGetCapabilities XInputGetCapabilities; |
| PFN_XInputGetState XInputGetState; |
| #endif |
| |
| ImGui_ImplWin32_Data() { memset((void*)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 : nullptr; |
| } |
| |
| // Functions |
| bool ImGui_ImplWin32_Init(void* hwnd) |
| { |
| return ImGui_ImplWin32_InitForOpenGL(hwnd, NULL); |
| } |
| |
| bool ImGui_ImplWin32_InitForOpenGL(void* hwnd, void* hglrc) |
| { |
| ImGuiIO& io = ImGui::GetIO(); |
| IM_ASSERT(io.BackendPlatformUserData == nullptr && "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 call io.AddMouseViewportEvent() with correct data (optional) |
| |
| bd->hWnd = (HWND)hwnd; |
| bd->OpenGlContext = (HGLRC)hglrc; |
| 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 WGL symbols |
| // This is needed to allow compilation if and when non-OpenGL APIs are used with Win32. |
| // The function pointer names are preceded with an underscore ("_") to prevent duplicate |
| // symbols in projects where OpenGL32.dll is linked implicitly. |
| if (hglrc && !(bd->OglDLL)) |
| { |
| bd->OglDLL = ::LoadLibraryA("opengl32.dll"); |
| IM_ASSERT(bd->OglDLL); |
| _wglCreateContext = (HGLRC(WINAPI*)(HDC))GetProcAddress(bd->OglDLL, "wglCreateContext"); |
| _wglDeleteContext = (BOOL(WINAPI*)(HGLRC))GetProcAddress(bd->OglDLL, "wglDeleteContext"); |
| _wglMakeCurrent = (BOOL(WINAPI*)(HDC, HGLRC))GetProcAddress(bd->OglDLL, "wglMakeCurrent"); |
| _wglShareLists = (BOOL(WINAPI*)(HGLRC, HGLRC))GetProcAddress(bd->OglDLL, "wglShareLists"); |
| _wglGetCurrentContext = (HGLRC(WINAPI*)(VOID))GetProcAddress(bd->OglDLL, "wglGetCurrentContext"); |
| _wglGetCurrentDC = (HDC(WINAPI*)(VOID))GetProcAddress(bd->OglDLL, "wglGetCurrentDC"); |
| IM_ASSERT(_wglCreateContext); |
| IM_ASSERT(_wglDeleteContext); |
| IM_ASSERT(_wglMakeCurrent); |
| IM_ASSERT(_wglShareLists); |
| IM_ASSERT(_wglGetCurrentContext); |
| IM_ASSERT(_wglGetCurrentDC); |
| } |
| |
| // Dynamically load XInput library |
| #ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD |
| bd->WantUpdateHasGamepad = true; |
| 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 != nullptr && "No platform backend to shutdown, or already shutdown?"); |
| ImGuiIO& io = ImGui::GetIO(); |
| |
| ImGui_ImplWin32_ShutdownPlatformInterface(); |
| |
| // Unload OpenGL library |
| if (bd->OglDLL) |
| ::FreeLibrary(bd->OglDLL); |
| |
| // Unload XInput library |
| #ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD |
| if (bd->XInputDLL) |
| ::FreeLibrary(bd->XInputDLL); |
| #endif // IMGUI_IMPL_WIN32_DISABLE_GAMEPAD |
| |
| io.BackendPlatformName = nullptr; |
| io.BackendPlatformUserData = nullptr; |
| 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(nullptr); |
| } |
| 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(nullptr, 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(); |
| io.AddKeyEvent(ImGuiMod_Ctrl, IsVkDown(VK_CONTROL)); |
| io.AddKeyEvent(ImGuiMod_Shift, IsVkDown(VK_SHIFT)); |
| io.AddKeyEvent(ImGuiMod_Alt, IsVkDown(VK_MENU)); |
| io.AddKeyEvent(ImGuiMod_Super, IsVkDown(VK_APPS)); |
| } |
| |
| // 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) |
| // This also fills a short gap when clicking non-client area: WM_NCMOUSELEAVE -> modal OS move -> gap -> WM_NCMOUSEMOVE |
| if (!io.WantSetMousePos && bd->MouseTrackedArea == 0 && 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: call io.AddMouseViewportEvent() with the viewport the OS mouse cursor is hovering. |
| // If ImGuiBackendFlags_HasMouseHoveredViewport is not set by the backend, Dear imGui will ignore this field and infer the information using its flawed heuristic. |
| // - [X] Win32 backend correctly ignore viewports with the _NoInputs flag (here using ::WindowFromPoint with WM_NCHITTEST + HTTRANSPARENT in WndProc does that) |
| // Some backend are not able to handle that correctly. If a backend report an hovered viewport that has the _NoInputs flag (e.g. when dragging a window |
| // for docking, the viewport has the _NoInputs flag in order to allow us to find the viewport under), then Dear ImGui is forced to ignore the value reported |
| // by the backend, and use its flawed heuristic to guess the viewport behind. |
| // - [X] Win32 backend correctly reports this regardless of another viewport behind focused and dragged from (we need this to find a useful drag and drop target). |
| ImGuiID mouse_viewport_id = 0; |
| if (has_mouse_screen_pos) |
| if (HWND hovered_hwnd = ::WindowFromPoint(mouse_screen_pos)) |
| if (ImGuiViewport* viewport = ImGui::FindViewportByPlatformHandle((void*)hovered_hwnd)) |
| mouse_viewport_id = viewport->ID; |
| io.AddMouseViewportEvent(mouse_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(); |
| //if ((io.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) == 0) // FIXME: Technically feeding gamepad shouldn't depend on this now that they are regular inputs. |
| // 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; |
| XINPUT_GAMEPAD& gamepad = xinput_state.Gamepad; |
| if (!bd->HasGamepad || bd->XInputGetState == nullptr || bd->XInputGetState(0, &xinput_state) != ERROR_SUCCESS) |
| return; |
| io.BackendFlags |= ImGuiBackendFlags_HasGamepad; |
| |
| #define IM_SATURATE(V) (V < 0.0f ? 0.0f : V > 1.0f ? 1.0f : V) |
| #define MAP_BUTTON(KEY_NO, BUTTON_ENUM) { io.AddKeyEvent(KEY_NO, (gamepad.wButtons & BUTTON_ENUM) != 0); } |
| #define MAP_ANALOG(KEY_NO, VALUE, V0, V1) { float vn = (float)(VALUE - V0) / (float)(V1 - V0); io.AddKeyAnalogEvent(KEY_NO, vn > 0.10f, IM_SATURATE(vn)); } |
| MAP_BUTTON(ImGuiKey_GamepadStart, XINPUT_GAMEPAD_START); |
| MAP_BUTTON(ImGuiKey_GamepadBack, XINPUT_GAMEPAD_BACK); |
| MAP_BUTTON(ImGuiKey_GamepadFaceLeft, XINPUT_GAMEPAD_X); |
| MAP_BUTTON(ImGuiKey_GamepadFaceRight, XINPUT_GAMEPAD_B); |
| MAP_BUTTON(ImGuiKey_GamepadFaceUp, XINPUT_GAMEPAD_Y); |
| MAP_BUTTON(ImGuiKey_GamepadFaceDown, XINPUT_GAMEPAD_A); |
| MAP_BUTTON(ImGuiKey_GamepadDpadLeft, XINPUT_GAMEPAD_DPAD_LEFT); |
| MAP_BUTTON(ImGuiKey_GamepadDpadRight, XINPUT_GAMEPAD_DPAD_RIGHT); |
| MAP_BUTTON(ImGuiKey_GamepadDpadUp, XINPUT_GAMEPAD_DPAD_UP); |
| MAP_BUTTON(ImGuiKey_GamepadDpadDown, XINPUT_GAMEPAD_DPAD_DOWN); |
| MAP_BUTTON(ImGuiKey_GamepadL1, XINPUT_GAMEPAD_LEFT_SHOULDER); |
| MAP_BUTTON(ImGuiKey_GamepadR1, XINPUT_GAMEPAD_RIGHT_SHOULDER); |
| MAP_ANALOG(ImGuiKey_GamepadL2, gamepad.bLeftTrigger, XINPUT_GAMEPAD_TRIGGER_THRESHOLD, 255); |
| MAP_ANALOG(ImGuiKey_GamepadR2, gamepad.bRightTrigger, XINPUT_GAMEPAD_TRIGGER_THRESHOLD, 255); |
| MAP_BUTTON(ImGuiKey_GamepadL3, XINPUT_GAMEPAD_LEFT_THUMB); |
| MAP_BUTTON(ImGuiKey_GamepadR3, XINPUT_GAMEPAD_RIGHT_THUMB); |
| MAP_ANALOG(ImGuiKey_GamepadLStickLeft, gamepad.sThumbLX, -XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, -32768); |
| MAP_ANALOG(ImGuiKey_GamepadLStickRight, gamepad.sThumbLX, +XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, +32767); |
| MAP_ANALOG(ImGuiKey_GamepadLStickUp, gamepad.sThumbLY, +XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, +32767); |
| MAP_ANALOG(ImGuiKey_GamepadLStickDown, gamepad.sThumbLY, -XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, -32768); |
| MAP_ANALOG(ImGuiKey_GamepadRStickLeft, gamepad.sThumbRX, -XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, -32768); |
| MAP_ANALOG(ImGuiKey_GamepadRStickRight, gamepad.sThumbRX, +XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, +32767); |
| MAP_ANALOG(ImGuiKey_GamepadRStickUp, gamepad.sThumbRY, +XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, +32767); |
| MAP_ANALOG(ImGuiKey_GamepadRStickDown, gamepad.sThumbRY, -XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, -32768); |
| #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(nullptr, nullptr, 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 != nullptr && "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. Keep calling your message handler unless this function returns TRUE. |
| // 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, or clear/overwrite your copy of the mouse data. |
| // - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data. |
| // 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 |
| |
| // See https://learn.microsoft.com/en-us/windows/win32/tablet/system-events-and-mouse-messages |
| // Prefer to call this at the top of the message handler to avoid the possibility of other Win32 calls interfering with this. |
| static ImGuiMouseSource GetMouseSourceFromMessageExtraInfo() |
| { |
| LPARAM extra_info = ::GetMessageExtraInfo(); |
| if ((extra_info & 0xFFFFFF80) == 0xFF515700) |
| return ImGuiMouseSource_Pen; |
| if ((extra_info & 0xFFFFFF80) == 0xFF515780) |
| return ImGuiMouseSource_TouchScreen; |
| return ImGuiMouseSource_Mouse; |
| } |
| |
| IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) |
| { |
| if (ImGui::GetCurrentContext() == nullptr) |
| return 0; |
| |
| ImGuiIO& io = ImGui::GetIO(); |
| ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData(); |
| |
| switch (msg) |
| { |
| case WM_MOUSEMOVE: |
| case WM_NCMOUSEMOVE: |
| { |
| // We need to call TrackMouseEvent in order to receive WM_MOUSELEAVE events |
| ImGuiMouseSource mouse_source = GetMouseSourceFromMessageExtraInfo(); |
| const int area = (msg == WM_MOUSEMOVE) ? 1 : 2; |
| bd->MouseHwnd = hwnd; |
| if (bd->MouseTrackedArea != area) |
| { |
| TRACKMOUSEEVENT tme_cancel = { sizeof(tme_cancel), TME_CANCEL, hwnd, 0 }; |
| TRACKMOUSEEVENT tme_track = { sizeof(tme_track), (DWORD)((area == 2) ? (TME_LEAVE | TME_NONCLIENT) : TME_LEAVE), hwnd, 0 }; |
| if (bd->MouseTrackedArea != 0) |
| ::TrackMouseEvent(&tme_cancel); |
| ::TrackMouseEvent(&tme_track); |
| bd->MouseTrackedArea = area; |
| } |
| POINT mouse_pos = { (LONG)GET_X_LPARAM(lParam), (LONG)GET_Y_LPARAM(lParam) }; |
| bool want_absolute_pos = (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable) != 0; |
| if (msg == WM_MOUSEMOVE && want_absolute_pos) // WM_MOUSEMOVE are client-relative coordinates. |
| ::ClientToScreen(hwnd, &mouse_pos); |
| if (msg == WM_NCMOUSEMOVE && !want_absolute_pos) // WM_NCMOUSEMOVE are absolute coordinates. |
| ::ScreenToClient(hwnd, &mouse_pos); |
| io.AddMouseSourceEvent(mouse_source); |
| io.AddMousePosEvent((float)mouse_pos.x, (float)mouse_pos.y); |
| break; |
| } |
| case WM_MOUSELEAVE: |
| case WM_NCMOUSELEAVE: |
| { |
| const int area = (msg == WM_MOUSELEAVE) ? 1 : 2; |
| if (bd->MouseTrackedArea == area) |
| { |
| if (bd->MouseHwnd == hwnd) |
| bd->MouseHwnd = nullptr; |
| bd->MouseTrackedArea = 0; |
| 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: |
| { |
| ImGuiMouseSource mouse_source = GetMouseSourceFromMessageExtraInfo(); |
| 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() == nullptr) |
| ::SetCapture(hwnd); |
| bd->MouseButtonsDown |= 1 << button; |
| io.AddMouseSourceEvent(mouse_source); |
| io.AddMouseButtonEvent(button, true); |
| return 0; |
| } |
| case WM_LBUTTONUP: |
| case WM_RBUTTONUP: |
| case WM_MBUTTONUP: |
| case WM_XBUTTONUP: |
| { |
| ImGuiMouseSource mouse_source = GetMouseSourceFromMessageExtraInfo(); |
| 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.AddMouseSourceEvent(mouse_source); |
| 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: |
| if (::IsWindowUnicode(hwnd)) |
| { |
| // You can also use ToAscii()+GetKeyboardState() to retrieve characters. |
| if (wParam > 0 && wParam < 0x10000) |
| io.AddInputCharacterUTF16((unsigned short)wParam); |
| } |
| else |
| { |
| wchar_t wch = 0; |
| ::MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, (char*)&wParam, 1, &wch, 1); |
| io.AddInputCharacter(wch); |
| } |
| return 0; |
| case WM_SETCURSOR: |
| // This is required to restore cursor when transitioning from e.g resize borders to client area. |
| if (LOWORD(lParam) == HTCLIENT && ImGui_ImplWin32_UpdateMouseCursor()) |
| return 1; |
| return 0; |
| case WM_DEVICECHANGE: |
| #ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD |
| if ((UINT)wParam == DBT_DEVNODES_CHANGED) |
| bd->WantUpdateHasGamepad = true; |
| #endif |
| 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 <VersionHelpers.h> 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 = nullptr; |
| if (RtlVerifyVersionInfoFn == nullptr) |
| if (HMODULE ntdllModule = ::GetModuleHandleA("ntdll.dll")) |
| RtlVerifyVersionInfoFn = (PFN_RtlVerifyVersionInfo)GetProcAddress(ntdllModule, "RtlVerifyVersionInfo"); |
| if (RtlVerifyVersionInfoFn == nullptr) |
| 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 = nullptr; |
| if (GetDpiForMonitorFn == nullptr && shcore_dll != nullptr) |
| GetDpiForMonitorFn = (PFN_GetDpiForMonitor)::GetProcAddress(shcore_dll, "GetDpiForMonitor"); |
| if (GetDpiForMonitorFn != nullptr) |
| { |
| 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(nullptr); |
| xdpi = ::GetDeviceCaps(dc, LOGPIXELSX); |
| ydpi = ::GetDeviceCaps(dc, LOGPIXELSY); |
| IM_ASSERT(xdpi == ydpi); // Please contact me if you hit this assert! |
| ::ReleaseDC(nullptr, 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* RendererUserData field of each ImGuiViewport to easily retrieve our backend data. |
| struct ImGui_ImplWin32_ViewportData |
| { |
| HWND Hwnd; |
| bool HwndOwned; |
| HGLRC OpenGlContext; |
| DWORD DwStyle; |
| DWORD DwExStyle; |
| |
| ImGui_ImplWin32_ViewportData() |
| { |
| Hwnd = nullptr; |
| HwndOwned = false; |
| OpenGlContext = nullptr; |
| DwStyle = 0; |
| DwExStyle = 0; |
| } |
| ~ImGui_ImplWin32_ViewportData() { IM_ASSERT(Hwnd == nullptr); } |
| }; |
| |
| 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 = nullptr; |
| 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, nullptr, ::GetModuleHandle(nullptr), nullptr); // Parent window, Menu, Instance, Param |
| vd->HwndOwned = true; |
| viewport->PlatformRequestResize = false; |
| viewport->PlatformHandle = viewport->PlatformHandleRaw = vd->Hwnd; |
| |
| ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData(); |
| if (bd->OpenGlContext) |
| { |
| HDC previousDC = _wglGetCurrentDC(); |
| HGLRC previousRC = _wglGetCurrentContext(); |
| HDC newDC = ::GetDC(vd->Hwnd); |
| |
| // Use the main window's pixel format |
| int pf; |
| PIXELFORMATDESCRIPTOR pfd; |
| if (previousDC) |
| { |
| pf = ::GetPixelFormat(previousDC); |
| ::DescribePixelFormat(previousDC, pf, sizeof(pfd), &pfd); |
| } |
| else |
| { |
| HDC mainDC = ::GetDC(bd->hWnd); |
| pf = ::GetPixelFormat(mainDC); |
| ::DescribePixelFormat(mainDC, pf, sizeof(pfd), &pfd); |
| ::ReleaseDC(bd->hWnd, mainDC); |
| } |
| ::SetPixelFormat(newDC, pf, &pfd); |
| |
| // Create OpenGL context and share main context's lists with it |
| vd->OpenGlContext = _wglCreateContext(newDC); |
| _wglMakeCurrent(newDC, vd->OpenGlContext); |
| _wglShareLists(bd->OpenGlContext, vd->OpenGlContext); |
| _wglMakeCurrent(previousDC, previousRC); |
| ::ReleaseDC(vd->Hwnd, newDC); |
| } |
| } |
| |
| 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) |
| { |
| if (vd->OpenGlContext) |
| _wglDeleteContext(vd->OpenGlContext); |
| |
| ::DestroyWindow(vd->Hwnd); |
| } |
| vd->Hwnd = nullptr; |
| IM_DELETE(vd); |
| } |
| viewport->PlatformUserData = viewport->PlatformHandle = nullptr; |
| } |
| |
| 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, nullptr, 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, nullptr, 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, nullptr, 0); |
| ImVector<wchar_t> 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 void ImGui_ImplWin32_PushOglContext(ImGuiViewport* viewport) |
| { |
| ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData(); |
| ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData; |
| IM_ASSERT(vd->OpenGlContext); // ImGui_ImplWin32_PushOglContext() is only registered if API is OpenGL |
| |
| bd->stashedDeviceContext = _wglGetCurrentDC(); |
| bd->stashedOpenGlContext = _wglGetCurrentContext(); |
| _wglMakeCurrent(::GetDC(vd->Hwnd), vd->OpenGlContext); |
| } |
| |
| static void ImGui_ImplWin32_PopOglContext(ImGuiViewport* viewport) |
| { |
| ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData(); |
| ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData; |
| IM_ASSERT(vd->OpenGlContext); // ImGui_ImplWin32_PopOglContext() is only registered if API is OpenGL |
| |
| IM_ASSERT(_wglGetCurrentContext() == vd->OpenGlContext); |
| HDC vd_dc = _wglGetCurrentDC(); |
| _wglMakeCurrent(bd->stashedDeviceContext, bd->stashedOpenGlContext); |
| ::ReleaseDC(vd->Hwnd, vd_dc); |
| } |
| |
| static void ImGui_ImplWin32_OGL_SwapBuffers(ImGuiViewport* viewport, void*) |
| { |
| ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData; |
| IM_ASSERT(vd->OpenGlContext); // ImGui_ImplWin32_OGL_SwapBuffers() is only registered if API is OpenGL |
| |
| ImGui_ImplWin32_PushOglContext(viewport); |
| ::SwapBuffers(_wglGetCurrentDC()); |
| ImGui_ImplWin32_PopOglContext(viewport); |
| } |
| |
| 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_ERASEBKGND: |
| // Prevent flickering on window invalidation |
| return TRUE; |
| 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 call io.AddMouseViewportEvent() correctly. (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(nullptr); |
| wcex.hIcon = nullptr; |
| wcex.hCursor = nullptr; |
| wcex.hbrBackground = (HBRUSH)(COLOR_BACKGROUND + 1); |
| wcex.lpszMenuName = nullptr; |
| wcex.lpszClassName = _T("ImGui Platform"); |
| wcex.hIconSm = nullptr; |
| ::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 |
| |
| ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData(); |
| if (bd->OpenGlContext) // OpenGL |
| { |
| platform_io.Platform_PushOglContext = ImGui_ImplWin32_PushOglContext; |
| platform_io.Platform_PopOglContext = ImGui_ImplWin32_PopOglContext; |
| platform_io.Platform_SwapBuffers = ImGui_ImplWin32_OGL_SwapBuffers; |
| } |
| |
| // 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_ViewportData* vd = IM_NEW(ImGui_ImplWin32_ViewportData)(); |
| vd->Hwnd = bd->hWnd; |
| vd->HwndOwned = false; |
| vd->OpenGlContext = bd->OpenGlContext; |
| main_viewport->PlatformUserData = vd; |
| main_viewport->PlatformHandle = (void*)bd->hWnd; |
| } |
| |
| static void ImGui_ImplWin32_ShutdownPlatformInterface() |
| { |
| ::UnregisterClass(_T("ImGui Platform"), ::GetModuleHandle(nullptr)); |
| 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); |
| } |
| } |
| |
| //--------------------------------------------------------------------------------------------------------- |