candui.c

This folder includes IME sample source code for Simplified Chinese IMEs

        return;
    }

    dwValue = (lpCursor->y - sImeG.rcCandText.top) / sImeG.yChiCharHi;

    lpCandList = (LPCANDIDATELIST)((LPBYTE)lpCandInfo +
        lpCandInfo->dwOffset[0]);

    dwValue = dwValue + lpCandList->dwSelection /
        lpCandList->dwPageSize * lpCandList->dwPageSize;

    if (dwValue >= lpCandList->dwCount) {
        // invalid choice
        MessageBeep((UINT)-1);
    } else {
        NotifyIME(hIMC, NI_SELECTCANDIDATESTR, 0, dwValue);
    }

    ImmUnlockIMCC(lpIMC->hCandInfo);

    ImmUnlockIMC(hIMC);

    return;
}

/**********************************************************************/
/* CandPageDownUP()                                                   */
/**********************************************************************/
void PASCAL CandPageDownUP(
    HWND hCandWnd,
    UINT uCandDownUp)
{
    HIMC            hIMC;
    LPINPUTCONTEXT  lpIMC;
    LPPRIVCONTEXT   lpImcP;
    LPCANDIDATEINFO lpCandInfo;
    LPCANDIDATELIST lpCandList;
    HDC             hDC;
    HBITMAP         hCandHpBmp, hCandUpBmp, hCandDpBmp, hCandEpBmp;
    HBITMAP         hOldBmp;
    HDC             hMemDC;

    // change candlist
    hIMC = (HIMC)GetWindowLongPtr(GetWindow(hCandWnd, GW_OWNER), IMMGWLP_IMC);
    if (!hIMC) {
        return;
    }

    // get lpIMC
    lpIMC = (LPINPUTCONTEXT)ImmLockIMC(hIMC);
    if (!lpIMC) {
        return;
    }

    // get lpImcP
    lpImcP = (LPPRIVCONTEXT)ImmLockIMCC(lpIMC->hPrivate);
    if (!lpImcP) {
        return;
    }

    // get lpCandInfo
    lpCandInfo = (LPCANDIDATEINFO)ImmLockIMCC(lpIMC->hCandInfo);

    if (!lpCandInfo) {
        return;
    }
                                                 
    // get lpCandList and init dwCount & dwSelection
    lpCandList = (LPCANDIDATELIST)
        ((LPBYTE)lpCandInfo + lpCandInfo->dwOffset[0]);
    
    switch(uCandDownUp) {
    case uCandHome:
        ChooseCand(0x24, lpIMC, lpCandInfo, lpImcP);
        NotifyIME(hIMC, NI_CHANGECANDIDATELIST, 0, 0);
        break;
    case uCandUp:
        ChooseCand('-', lpIMC, lpCandInfo, lpImcP);
        NotifyIME(hIMC, NI_CHANGECANDIDATELIST, 0, 0);
        break;
    case uCandDown:
        ChooseCand('=', lpIMC, lpCandInfo, lpImcP);
        NotifyIME(hIMC, NI_CHANGECANDIDATELIST, 0, 0);
        break;
    case uCandEnd:
        ChooseCand(0x23, lpIMC, lpCandInfo, lpImcP);
        NotifyIME(hIMC, NI_CHANGECANDIDATELIST, 0, 0);
        break;
    default:
        break;
    }

    ImmUnlockIMCC(lpIMC->hPrivate);
    ImmUnlockIMCC(lpIMC->hCandInfo);
    ImmUnlockIMC(hIMC);

    // draw button down
    hDC = GetDC(hCandWnd);
    hCandHpBmp = LoadBitmap(hInst, TEXT("CandHp"));
    hCandUpBmp = LoadBitmap(hInst, TEXT("CandUp"));
    hCandDpBmp = LoadBitmap(hInst, TEXT("CandDp"));
    hCandEpBmp = LoadBitmap(hInst, TEXT("CandEp"));

    hMemDC = CreateCompatibleDC(hDC);

    switch(uCandDownUp) {
    case uCandHome:
        hOldBmp = SelectObject(hMemDC, hCandHpBmp);
        BitBlt(hDC, sImeG.rcCandBTH.left, sImeG.rcCandBTH.top,
            sImeG.rcCandBTH.right - sImeG.rcCandBTH.left,
            STATUS_DIM_Y,
            hMemDC, 0, 0, SRCCOPY);
        break;
    case uCandUp:
        hOldBmp = SelectObject(hMemDC, hCandUpBmp);
        BitBlt(hDC, sImeG.rcCandBTU.left, sImeG.rcCandBTU.top,
            sImeG.rcCandBTU.right - sImeG.rcCandBTU.left,
            STATUS_DIM_Y,
            hMemDC, 0, 0, SRCCOPY);
        break;
    case uCandDown:
        hOldBmp = SelectObject(hMemDC, hCandDpBmp);
        BitBlt(hDC, sImeG.rcCandBTD.left, sImeG.rcCandBTD.top,
            sImeG.rcCandBTD.right - sImeG.rcCandBTD.left,
            STATUS_DIM_Y,
            hMemDC, 0, 0, SRCCOPY);

        break;
    case uCandEnd:
        hOldBmp = SelectObject(hMemDC, hCandEpBmp);
        BitBlt(hDC, sImeG.rcCandBTE.left, sImeG.rcCandBTE.top,
            sImeG.rcCandBTE.right - sImeG.rcCandBTE.left,
            STATUS_DIM_Y,
            hMemDC, 0, 0, SRCCOPY);
        break;
    default:
        break;
    }
        
    SelectObject(hMemDC, hOldBmp);
    DeleteDC(hMemDC);
    DeleteObject(hCandEpBmp);
    DeleteObject(hCandDpBmp);
    DeleteObject(hCandUpBmp);
    DeleteObject(hCandHpBmp);
    ReleaseDC(hCandWnd, hDC);

    return;
}

/**********************************************************************/
/* CandSetCursor()                                                    */
/**********************************************************************/
void PASCAL CandSetCursor(
    HWND   hCandWnd,
    LPARAM lParam)
{
    POINT ptCursor;
    RECT  rcWnd;

    if (GetWindowLong(hCandWnd, UI_MOVE_OFFSET) !=
        WINDOW_NOT_DRAG) {
        SetCursor(LoadCursor(NULL, IDC_SIZEALL));
        return;
    }

    if (HIWORD(lParam) == WM_LBUTTONDOWN) {
        SystemParametersInfo(SPI_GETWORKAREA, 0, &sImeG.rcWorkArea, 0);

        GetCursorPos(&ptCursor);
        ScreenToClient(hCandWnd, &ptCursor);

        if (PtInRect(&sImeG.rcCandText, ptCursor)
           && sImeG.IC_Trace) {
            SetCursor(LoadCursor(hInst, szHandCursor));
            MouseSelectCandStr(hCandWnd, &ptCursor);
            return;
        } else if (PtInRect(&sImeG.rcCandBTH, ptCursor)) {
            CandPageDownUP(hCandWnd, uCandHome);
            return;
        } else if (PtInRect(&sImeG.rcCandBTU, ptCursor)) {
            CandPageDownUP(hCandWnd, uCandUp);
            return;
        } else if (PtInRect(&sImeG.rcCandBTD, ptCursor)) {
            CandPageDownUP(hCandWnd, uCandDown);
            return;
        } else if (PtInRect(&sImeG.rcCandBTE, ptCursor)) {
            CandPageDownUP(hCandWnd, uCandEnd);
            return;
        } else {
            SetCursor(LoadCursor(NULL, IDC_SIZEALL));
        }
    } else if (HIWORD(lParam) == WM_LBUTTONUP) {
        HDC             hDC;
        HBITMAP         hCandHBmp, hCandUBmp, hCandDBmp, hCandEBmp;
        HBITMAP         hOldBmp;
        HDC             hMemDC;

        hDC = GetDC(hCandWnd);

        hCandHBmp = LoadBitmap(hInst, TEXT("CandH"));
        hCandUBmp = LoadBitmap(hInst, TEXT("CandU"));
        hCandDBmp = LoadBitmap(hInst, TEXT("CandD"));
        hCandEBmp = LoadBitmap(hInst, TEXT("CandE"));
        hMemDC = CreateCompatibleDC(hDC);

        hOldBmp = SelectObject(hMemDC, hCandHBmp);
        BitBlt(hDC, sImeG.rcCandBTH.left, sImeG.rcCandBTH.top,
            sImeG.rcCandBTH.right - sImeG.rcCandBTH.left,
            STATUS_DIM_Y,
            hMemDC, 0, 0, SRCCOPY);

        SelectObject(hMemDC, hCandUBmp);
        BitBlt(hDC, sImeG.rcCandBTU.left, sImeG.rcCandBTU.top,
            sImeG.rcCandBTU.right - sImeG.rcCandBTU.left,
            STATUS_DIM_Y,
            hMemDC, 0, 0, SRCCOPY);

        SelectObject(hMemDC, hCandDBmp);
        BitBlt(hDC, sImeG.rcCandBTD.left, sImeG.rcCandBTD.top,
            sImeG.rcCandBTD.right - sImeG.rcCandBTD.left,
            STATUS_DIM_Y,
            hMemDC, 0, 0, SRCCOPY);

        SelectObject(hMemDC, hCandEBmp);
        BitBlt(hDC, sImeG.rcCandBTE.left, sImeG.rcCandBTE.top,
            sImeG.rcCandBTE.right - sImeG.rcCandBTE.left,
            STATUS_DIM_Y,
            hMemDC, 0, 0, SRCCOPY);

        SelectObject(hMemDC, hOldBmp);
        DeleteObject(hCandEBmp);
        DeleteObject(hCandDBmp);
        DeleteObject(hCandUBmp);
        DeleteObject(hCandEBmp);
        DeleteDC(hMemDC);
        ReleaseDC(hCandWnd, hDC);

        return;
    } else {
        SystemParametersInfo(SPI_GETWORKAREA, 0, &sImeG.rcWorkArea, 0);

        GetCursorPos(&ptCursor);
        ScreenToClient(hCandWnd, &ptCursor);

        if (PtInRect(&sImeG.rcCandText, ptCursor)) {
            SetCursor(LoadCursor(hInst, szHandCursor));
            return;
        } else if (PtInRect(&sImeG.rcCandBTH, ptCursor)) {
            SetCursor(LoadCursor(hInst, szHandCursor));
        } else if (PtInRect(&sImeG.rcCandBTU, ptCursor)) {
            SetCursor(LoadCursor(hInst, szHandCursor));
        } else if (PtInRect(&sImeG.rcCandBTD, ptCursor)) {
            SetCursor(LoadCursor(hInst, szHandCursor));
        } else if (PtInRect(&sImeG.rcCandBTE, ptCursor)) {
            SetCursor(LoadCursor(hInst, szHandCursor));
        } else {
            SetCursor(LoadCursor(NULL, IDC_SIZEALL));
        }

        return;
    }

    SetCapture(hCandWnd);
    GetCursorPos(&ptCursor);
    SetWindowLong(hCandWnd, UI_MOVE_XY,
        MAKELONG(ptCursor.x, ptCursor.y));
    GetWindowRect(hCandWnd, &rcWnd);
    SetWindowLong(hCandWnd, UI_MOVE_OFFSET,
        MAKELONG(ptCursor.x - rcWnd.left, ptCursor.y - rcWnd.top));

    DrawDragBorder(hCandWnd, MAKELONG(ptCursor.x, ptCursor.y),
        GetWindowLong(hCandWnd, UI_MOVE_OFFSET));

    return;
}

/**********************************************************************/
/* CandButtonUp()                                                     */
/**********************************************************************/
BOOL PASCAL CandButtonUp(
    HWND hCandWnd)
{
    LONG           lTmpCursor, lTmpOffset;
    POINT          pt;
    HWND           hUIWnd;
    HIMC           hIMC;
    LPINPUTCONTEXT lpIMC;

    if (GetWindowLong(hCandWnd, UI_MOVE_OFFSET) == WINDOW_NOT_DRAG) {
        return (FALSE);
    }

    lTmpCursor = GetWindowLong(hCandWnd, UI_MOVE_XY);

    // calculate the org by the offset
    lTmpOffset = GetWindowLong(hCandWnd, UI_MOVE_OFFSET);

    pt.x = (*(LPPOINTS)&lTmpCursor).x - (*(LPPOINTS)&lTmpOffset).x;
    pt.y = (*(LPPOINTS)&lTmpCursor).y - (*(LPPOINTS)&lTmpOffset).y;

    DrawDragBorder(hCandWnd, lTmpCursor, lTmpOffset);
    SetWindowLong(hCandWnd, UI_MOVE_OFFSET, WINDOW_NOT_DRAG);
    ReleaseCapture();

    hUIWnd = GetWindow(hCandWnd, GW_OWNER);

    hIMC = (HIMC)GetWindowLongPtr(hUIWnd, IMMGWLP_IMC);
    if (!hIMC) {
        return (FALSE);
    }

    lpIMC = (LPINPUTCONTEXT)ImmLockIMC(hIMC);
    if (!lpIMC) {
        return (FALSE);
    }

    AdjustCandBoundry(&pt);

    ScreenToClient(lpIMC->hWnd, &pt);

    lpIMC->cfCandForm[0].dwStyle |= CFS_CANDIDATEPOS;
    lpIMC->cfCandForm[0].ptCurrentPos = pt;

    ImmUnlockIMC(hIMC);

    PostMessage(hCandWnd, WM_IME_NOTIFY, IMN_SETCANDIDATEPOS, 0x0001);

    return (TRUE);
}

/**********************************************************************/
/* UpdateCandWindow()                                                 */
/**********************************************************************/
void PASCAL PaintCandWindow(
    HWND hCandWnd,
    HDC  hDC)
{
    HIMC            hIMC;
    LPINPUTCONTEXT  lpIMC;
    LPCANDIDATEINFO lpCandInfo;
    LPCANDIDATELIST lpCandList;
    LPPRIVCONTEXT   lpImcP;
    HGDIOBJ         hOldFont;
    DWORD           dwStart, dwEnd;
    TCHAR           szStrBuf[2 * MAXSTRLEN * sizeof(WCHAR) / sizeof(TCHAR) + 1];
    int             i;
    HBITMAP         hCandIconBmp, hCandInfBmp;
    HBITMAP         hOldBmp, hCandHBmp, hCandUBmp, hCandDBmp, hCandEBmp;
    HDC             hMemDC;

    hIMC = (HIMC)GetWindowLongPtr(GetWindow(hCandWnd, GW_OWNER), IMMGWLP_IMC);
    if (!hIMC) {
        return;
    }

    lpIMC = (LPINPUTCONTEXT)ImmLockIMC(hIMC);
    if (!lpIMC) {
        return;
    }

    if (!lpIMC->hCandInfo) {
        goto UpCandW2UnlockIMC;
    }

    lpCandInfo = (LPCANDIDATEINFO)ImmLockIMCC(lpIMC->hCandInfo);
    if (!lpCandInfo) {
        goto UpCandW2UnlockIMC;
    }

    if (!lpIMC->hPrivate) {
        goto UpCandW2UnlockCandInfo;
    }

    lpImcP = (LPPRIVCONTEXT)ImmLockIMCC(lpIMC->hPrivate);
    if (!lpImcP) {
        goto UpCandW2UnlockCandInfo;
    }

    // set font
    if (sImeG.fDiffSysCharSet) {
        LOGFONT lfFont;
        ZeroMemory(&lfFont, sizeof(lfFont));
        hOldFont = GetCurrentObject(hDC, OBJ_FONT);
        lfFont.lfHeight = -MulDiv(12, GetDeviceCaps(hDC, LOGPIXELSY), 72);
        lfFont.lfCharSet = NATIVE_CHARSET;
        lstrcpy(lfFont.lfFaceName, TEXT("Simsun"));
        SelectObject(hDC, CreateFontIndirect(&lfFont));
    }

    lpCandList = (LPCANDIDATELIST)((LPBYTE)lpCandInfo +
        lpCandInfo->dwOffset[0]);

    dwStart = lpCandList->dwSelection;
    dwEnd = dwStart + lpCandList->dwPageSize;

    if (dwEnd > lpCandList->dwCount) {
        dwEnd = lpCandList->dwCount;
    }

    // draw CandWnd Layout
    if (sImeG.IC_Trace) {
        RECT rcWnd;