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Backend: Win32: support keyboard codepage conversion for when compiling in MBCS mode and creating a non-Unicode window. (#6785, #6782, #5725)

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sneakyevil 2023-09-05 13:20:48 +02:00 committed by ocornut
parent e3d9b875c9
commit c9d3c29aa3
2 changed files with 19 additions and 1 deletions
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18
backends/imgui_impl_win32.cpp
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@ -36,6 +36,7 @@ typedef DWORD (WINAPI *PFN_XInputGetState)(DWORD, XINPUT_STATE*);
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2023-09-07: Inputs: Added support for keyboard codepage conversion for when application is compiled in MBCS mode and using a non-Unicode window.
// 2023-04-19: Added ImGui_ImplWin32_InitForOpenGL() to facilitate combining raw Win32/Winapi with OpenGL. (#3218)
// 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)
@ -94,6 +95,7 @@ struct ImGui_ImplWin32_Data
INT64 Time;
INT64 TicksPerSecond;
ImGuiMouseCursor LastMouseCursor;
UINT32 KeyboardCodePage;
#ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD
bool HasGamepad;
@ -116,6 +118,16 @@ static ImGui_ImplWin32_Data* ImGui_ImplWin32_GetBackendData()
}
// Functions
static void ImGui_ImplWin32_UpdateKeyboardCodePage()
{
// Retrieve keyboard code page, required for handling of non-Unicode Windows.
ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData();
HKL keyboard_layout = ::GetKeyboardLayout(0);
LCID keyboard_lcid = MAKELCID(HIWORD(keyboard_layout), SORT_DEFAULT);
if (::GetLocaleInfoA(keyboard_lcid, (LOCALE_RETURN_NUMBER | LOCALE_IDEFAULTANSICODEPAGE), (LPSTR)&bd->KeyboardCodePage, sizeof(bd->KeyboardCodePage)) == 0)
bd->KeyboardCodePage = CP_ACP; // Fallback to default ANSI code page when fails.
}
static bool ImGui_ImplWin32_InitEx(void* hwnd, bool platform_has_own_dc)
{
ImGuiIO& io = ImGui::GetIO();
@ -138,6 +150,7 @@ static bool ImGui_ImplWin32_InitEx(void* hwnd, bool platform_has_own_dc)
bd->TicksPerSecond = perf_frequency;
bd->Time = perf_counter;
bd->LastMouseCursor = ImGuiMouseCursor_COUNT;
ImGui_ImplWin32_UpdateKeyboardCodePage();
// Set platform dependent data in viewport
ImGui::GetMainViewport()->PlatformHandleRaw = (void*)hwnd;
@ -671,6 +684,9 @@ IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hwnd, UINT msg, WPARA
case WM_KILLFOCUS:
io.AddFocusEvent(msg == WM_SETFOCUS);
return 0;
case WM_INPUTLANGCHANGE:
ImGui_ImplWin32_UpdateKeyboardCodePage();
return 0;
case WM_CHAR:
if (::IsWindowUnicode(hwnd))
{
@ -681,7 +697,7 @@ IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hwnd, UINT msg, WPARA
else
{
wchar_t wch = 0;
::MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, (char*)&wParam, 1, &wch, 1);
::MultiByteToWideChar(bd->KeyboardCodePage, MB_PRECOMPOSED, (char*)&wParam, 1, &wch, 1);
io.AddInputCharacter(wch);
}
return 0;

2
docs/CHANGELOG.txt
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@ -52,6 +52,8 @@ Other changes:
Was most often noticable when using an horizontal scrollbar. (#6789)
- ImDrawList: Added AddEllipse(), AddEllipseFilled(), PathEllipticalArcTo(). (#2743) [@Doohl]
- Backends: GLFW: Clear emscripten's MouseWheel callback before shutdown. (#6790, #6096, #4019) [@halx99]
- Backends: Win32: Added support for keyboard codepage conversion for when application
is compiled in MBCS mode and using a non-Unicode window. (#6785, #6782, #5725, #5961) [@sneakyevil]
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