libsdl中文输入法候选列表不显示解决方案

libsdl输入中文时输入法不显示，将WM_IME_SETCONTEXT事件处理给注释即可。

WM_IME_SETCONTEXT

If the application draws the composition window, the default IME window does not have to show its composition window. In this case, the application must clear the ISC_SHOWUICOMPOSITIONWINDOW value from the lParam parameter before passing the message to DefWindowProc or ImmIsUIMessage. To display a certain user interface window, an application should remove the corresponding value so that the IME will not display it.

修改SDL_windowskeyboard.c找到IME_HandleMessage函数改为以下代码即可。

SDL_bool
IME_HandleMessage(HWND hwnd, UINT msg, WPARAM wParam, LPARAM *lParam, SDL_VideoData *videodata)
{
SDL_bool trap = SDL_FALSE;
HIMC himc = 0;
if (!videodata->ime_initialized || !videodata->ime_available || !videodata->ime_enabled)
return SDL_FALSE;

switch (msg) {
case WM_INPUTLANGCHANGE:
IME_InputLangChanged(videodata);
break;
//输入法候选框不显示
//case WM_IME_SETCONTEXT:
//    *lParam = 0;
//    break;
case WM_IME_STARTCOMPOSITION:
trap = SDL_TRUE;
break;
case WM_IME_COMPOSITION:
trap = SDL_TRUE;
himc = ImmGetContext(hwnd);
if (*lParam & GCS_RESULTSTR) {
IME_GetCompositionString(videodata, himc, GCS_RESULTSTR);
IME_SendInputEvent(videodata);
}
if (*lParam & GCS_COMPSTR) {
if (!videodata->ime_uiless)
videodata->ime_readingstring[0] = 0;

IME_GetCompositionString(videodata, himc, GCS_COMPSTR);
IME_SendEditingEvent(videodata);
}
ImmReleaseContext(hwnd, himc);
break;
case WM_IME_ENDCOMPOSITION:
videodata->ime_composition[0] = 0;
videodata->ime_readingstring[0] = 0;
videodata->ime_cursor = 0;
SDL_SendEditingText("", 0, 0);
break;
case WM_IME_NOTIFY:
switch (wParam) {
case IMN_SETCONVERSIONMODE:
case IMN_SETOPENSTATUS:
IME_UpdateInputLocale(videodata);
break;
case IMN_OPENCANDIDATE:
case IMN_CHANGECANDIDATE:
if (videodata->ime_uiless)
break;

trap = SDL_TRUE;
IME_ShowCandidateList(videodata);
himc = ImmGetContext(hwnd);
if (!himc)
break;

IME_GetCandidateList(himc, videodata);
ImmReleaseContext(hwnd, himc);
break;
case IMN_CLOSECANDIDATE:
trap = SDL_TRUE;
IME_HideCandidateList(videodata);
break;
case IMN_PRIVATE:
{
DWORD dwId = IME_GetId(videodata, 0);
IME_GetReadingString(videodata, hwnd);
switch (dwId)
{
case IMEID_CHT_VER42:
case IMEID_CHT_VER43:
case IMEID_CHT_VER44:
case IMEID_CHS_VER41:
case IMEID_CHS_VER42:
if (*lParam == 1 || *lParam == 2)
trap = SDL_TRUE;

break;
case IMEID_CHT_VER50:
case IMEID_CHT_VER51:
case IMEID_CHT_VER52:
case IMEID_CHT_VER60:
case IMEID_CHS_VER53:
if (*lParam == 16
|| *lParam == 17
|| *lParam == 26
|| *lParam == 27
|| *lParam == 28)
trap = SDL_TRUE;
break;
}
}
break;
default:
trap = SDL_TRUE;
break;
}
break;
}
return trap;
}