mouse.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

    LPTSTR lpSchemeData;
    HKEY hCuKey;
    HKEY hCuCursorKey;
    LONG lError = ERROR_SUCCESS;
    BOOL bSchemeExists;

    LoadString(hApplet, IDS_SYSTEM_SCHEME, szSystemScheme, MAX_PATH);

    nSel = SendDlgItemMessage(hwndDlg, IDC_COMBO_CURSOR_SCHEME, CB_GETCURSEL, 0, 0);
    if (nSel == CB_ERR)
       return FALSE;

    if (nSel == 0)
    {
        szSchemeName[0] = 0;
    }
    else
    {
        SendDlgItemMessage(hwndDlg, IDC_COMBO_CURSOR_SCHEME, CB_GETLBTEXT, nSel, (LPARAM)szNewSchemeName);

        if (_tcsstr(szNewSchemeName, szSystemScheme))
        {
            szNewSchemeName[_tcslen(szNewSchemeName) - _tcslen(szSystemScheme) - 1] = 0;
        }
    }

    /* Ask for a name for the new cursor scheme */
    if (!DialogBoxParam(hApplet, MAKEINTRESOURCE(IDD_CURSOR_SCHEME_SAVEAS),
                        hwndDlg, SaveSchemeProc, (LPARAM)szNewSchemeName))
        return TRUE;

    /* Check all non-system schemes for the new name */
    nSel = SendDlgItemMessage(hwndDlg, IDC_COMBO_CURSOR_SCHEME, CB_GETCOUNT, 0, 0);
    if (nSel == CB_ERR)
        return FALSE;

    bSchemeExists = FALSE;
    for (i = 0; i < nSel; i++)
    {
        SendDlgItemMessage(hwndDlg, IDC_COMBO_CURSOR_SCHEME, CB_GETLBTEXT, i, (LPARAM)szSchemeName);
        if (_tcsstr(szSchemeName, szSystemScheme) == NULL)
        {
            if (_tcscmp(szSchemeName, szNewSchemeName) == 0)
            {
                bSchemeExists = TRUE;
                break;
            }
        }
    }

    if (bSchemeExists)
    {
        LoadString(hApplet, IDS_OVERWRITE_TITLE, szTitle, 128);
        LoadString(hApplet, IDS_OVERWRITE_TEXT, szText, 256);

         /* Confirm scheme overwrite */
        if (MessageBox(hwndDlg, szText, szTitle, MB_YESNO | MB_ICONQUESTION) == IDNO)
            return TRUE;
    }

    /* Save the cursor scheme */
    nLength = 0;
    for (index = IDS_ARROW, i = 0; index <= IDS_HAND; index++, i++)
    {
        if (i > 0)
            nLength++;
        nLength += _tcslen(g_CursorData[i].szCursorPath);
    }
    nLength++;

    lpSchemeData = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, nLength * sizeof(TCHAR));

    for (index = IDS_ARROW, i = 0; index <= IDS_HAND; index++, i++)
    {
        CompressPath(szTempPath, g_CursorData[i].szCursorPath);
        if (i > 0)
            _tcscat(lpSchemeData, _T(","));
        _tcscat(lpSchemeData, szTempPath);
    }

    if (RegOpenCurrentUser(KEY_READ | KEY_SET_VALUE, &hCuKey) != ERROR_SUCCESS)
        return FALSE;

    if (RegOpenKeyEx(hCuKey, _T("Control Panel\\Cursors\\Schemes"), 0, KEY_READ | KEY_SET_VALUE, &hCuCursorKey) != ERROR_SUCCESS)
    {
        RegCloseKey(hCuKey);
        return FALSE;
    }

    lError = RegSetValueEx(hCuCursorKey, szNewSchemeName, 0,
                           REG_EXPAND_SZ, (LPBYTE)lpSchemeData,
                           (_tcslen(lpSchemeData) + 1) * sizeof(TCHAR));

    RegCloseKey(hCuCursorKey);
    RegCloseKey(hCuKey);

    /* Add the new scheme to the scheme list and select it */
    if (lError == ERROR_SUCCESS)
    {
        LPTSTR copy = _tcsdup(lpSchemeData);

        nSel = SendDlgItemMessage(hwndDlg, IDC_COMBO_CURSOR_SCHEME, CB_ADDSTRING, (WPARAM)0, (LPARAM)szNewSchemeName);
        SendDlgItemMessage(hwndDlg, IDC_COMBO_CURSOR_SCHEME, CB_SETITEMDATA, (WPARAM)nSel, (LPARAM)copy);
        SendDlgItemMessage(hwndDlg, IDC_COMBO_CURSOR_SCHEME, CB_SETCURSEL, (WPARAM)nSel, (LPARAM)0);
    }

    HeapFree(GetProcessHeap(), 0, lpSchemeData);

    return (lError == ERROR_SUCCESS);
}


static BOOL
BrowseCursor(HWND hwndDlg)
{
    TCHAR szFileName[MAX_PATH];
    TCHAR szFilter[MAX_PATH];
    TCHAR szTitle[MAX_PATH];
    OPENFILENAME ofn;
    INT nSel;

    LoadString(hApplet, IDS_BROWSE_FILTER, szFilter, MAX_PATH);
    LoadString(hApplet, IDS_BROWSE_TITLE, szTitle, MAX_PATH);

    memset(szFileName, 0x0, sizeof(szFileName));
    nSel = SendDlgItemMessage(hwndDlg, IDC_LISTBOX_CURSOR, LB_GETCURSEL, 0, 0);
    if (nSel == LB_ERR)
    {
        MessageBox(hwndDlg, _T("LB_ERR"), _T(""), MB_ICONERROR);
        return FALSE;
    }

    ZeroMemory(&ofn, sizeof(OPENFILENAME));
    ofn.lStructSize = sizeof(OPENFILENAME);
    ofn.hwndOwner = hwndDlg;
    ofn.lpstrFilter = szFilter;
    ofn.nFilterIndex = 1;
    ofn.lpstrFile = szFileName;
    ofn.nMaxFile = MAX_PATH;
    ofn.lpstrInitialDir = _T("%WINDIR%\\Cursors");
    ofn.lpstrTitle = szTitle;
    ofn.Flags = OFN_EXPLORER | OFN_FILEMUSTEXIST;

    if (!GetOpenFileName(&ofn))
        return FALSE;

    /* Store the new cursor file path */
    _tcsncpy(g_CursorData[nSel].szCursorPath, szFileName, MAX_PATH);

    return TRUE;
}


static VOID
LoadCursorScheme(LPTSTR lpName, BOOL bSystem)
{
    UINT index, i;

    for (index = IDS_ARROW, i = 0; index <= IDS_HAND; index++, i++)
    {
        if (g_CursorData[i].hCursor != NULL)
        {
            DestroyCursor(g_CursorData[i].hCursor);
            g_CursorData[i].hCursor = 0;
        }
        g_CursorData[i].szCursorPath[0] = 0;
    }

    if (lpName != NULL)
    {
        LPTSTR pStart = lpName;
        LPTSTR pEnd = pStart;
        INT nLength;

        i = 0;
        while (pEnd)
        {
            pEnd = _tcschr(pStart, _T(','));
            if (pEnd)
                nLength = ((INT_PTR)pEnd - (INT_PTR)pStart) / sizeof(TCHAR);
            else
                nLength = _tcslen(pStart);

            _tcsncpy(g_CursorData[i].szCursorPath, pStart, nLength);
            g_CursorData[i].szCursorPath[nLength] = 0;

            pStart = pStart + (nLength + 1);
            i++;
        }

    }

    for (index = IDS_ARROW, i = 0; index <= IDS_HAND; index++, i++)
    {
        if (g_CursorData[i].szCursorPath[0] == 0)
            g_CursorData[i].hCursor = (HCURSOR)LoadImage(NULL, MAKEINTRESOURCE(g_CursorData[i].uDefaultCursorId),
                                                         IMAGE_CURSOR, 0, 0,
                                                         LR_DEFAULTSIZE | LR_SHARED);
        else
            g_CursorData[i].hCursor = (HCURSOR)LoadImage(NULL, g_CursorData[i].szCursorPath,
                                                         IMAGE_CURSOR, 0, 0,
                                                         LR_LOADFROMFILE | LR_DEFAULTSIZE);
    }
}


static VOID
ReloadCurrentCursorScheme(VOID)
{
    UINT index, i;

    for (index = IDS_ARROW, i = 0; index <= IDS_HAND; index++, i++)
    {
        if (g_CursorData[i].hCursor != NULL)
            DestroyCursor(g_CursorData[i].hCursor);

        if (g_CursorData[i].szCursorPath[0] == 0)
            g_CursorData[i].hCursor = (HCURSOR)LoadImage(NULL, MAKEINTRESOURCE(g_CursorData[i].uDefaultCursorId),
                                                         IMAGE_CURSOR, 0, 0,
                                                         LR_DEFAULTSIZE | LR_SHARED);
        else
            g_CursorData[i].hCursor = (HCURSOR)LoadImage(NULL, g_CursorData[i].szCursorPath,
                                                         IMAGE_CURSOR, 0, 0,
                                                         LR_LOADFROMFILE | LR_DEFAULTSIZE);
    }
}


static VOID
OnDrawItem(UINT idCtl,
           LPDRAWITEMSTRUCT lpdis,
           PPOINTER_DATA pPointerData)
{
    RECT rc;

    if (lpdis->itemState & ODS_SELECTED)
    {
        FillRect(lpdis->hDC,
                 &lpdis->rcItem,
                 (HBRUSH)(COLOR_HIGHLIGHT + 1));
        SetBkColor(lpdis->hDC,
                   GetSysColor(COLOR_HIGHLIGHT));
        SetTextColor(lpdis->hDC,
                   GetSysColor(COLOR_HIGHLIGHTTEXT));
    }
    else
    {
        FillRect(lpdis->hDC,
                 &lpdis->rcItem,
                 (HBRUSH)(COLOR_WINDOW + 1));
        SetBkColor(lpdis->hDC,
                   GetSysColor(COLOR_WINDOW));
        SetTextColor(lpdis->hDC,
                   GetSysColor(COLOR_WINDOWTEXT));
    }

    if (lpdis->itemID != -1)
    {
        CopyRect(&rc, &lpdis->rcItem);
        rc.left += 5;
        DrawText(lpdis->hDC,
                 g_CursorData[lpdis->itemData].szCursorName,
                 -1,
                 &rc,
                 DT_SINGLELINE | DT_VCENTER | DT_LEFT);

        if (g_CursorData[lpdis->itemData].hCursor != NULL)
        {
            DrawIcon(lpdis->hDC,
                     lpdis->rcItem.right - pPointerData->cxCursor - 4,
                     lpdis->rcItem.top + 2,
                     g_CursorData[lpdis->itemData].hCursor);
        }
    }

    if (lpdis->itemState & ODS_FOCUS)
    {
        CopyRect(&rc, &lpdis->rcItem);
        InflateRect(&rc, -1, -1);
        DrawFocusRect(lpdis->hDC, &rc);
    }
}


static VOID
LoadNewCursorScheme(HWND hwndDlg)
{
    TCHAR buffer[MAX_PATH];
    TCHAR szSystemScheme[MAX_PATH];
    HWND hDlgCtrl;
    BOOL bEnable;
    LPTSTR lpName;
    INT nSel;

    nSel = SendDlgItemMessage(hwndDlg, IDC_COMBO_CURSOR_SCHEME, CB_GETCURSEL, 0, 0);
    if (nSel == CB_ERR)
       return;

    SendDlgItemMessage(hwndDlg, IDC_COMBO_CURSOR_SCHEME, CB_GETLBTEXT, nSel, (LPARAM)buffer);

    LoadString(hApplet, IDS_SYSTEM_SCHEME, szSystemScheme, MAX_PATH);
    if (_tcsstr(buffer, szSystemScheme) || nSel == 0) //avoid the default scheme can be deleted
        bEnable = FALSE;
    else
        bEnable = TRUE;

    /* delete button */
    hDlgCtrl = GetDlgItem(hwndDlg, IDC_BUTTON_DELETE_SCHEME);
    EnableWindow(hDlgCtrl, bEnable);

    lpName = (LPTSTR)SendDlgItemMessage(hwndDlg, IDC_COMBO_CURSOR_SCHEME, CB_GETITEMDATA, nSel, 0);
    LoadCursorScheme(lpName, !bEnable);
    RefreshCursorList(hwndDlg, FALSE);
}


static VOID
LoadInitialCursorScheme(HWND hwndDlg)
{
    TCHAR szSchemeName[256];
    TCHAR szSystemScheme[256];
    TCHAR szCursorPath[256];
    HKEY hCursorKey;
    LONG lError;
    DWORD dwDataSize;
    DWORD dwSchemeSource = 0;
    UINT index, i;
    DWORD dwType;
    INT nSel;

    for (index = IDS_ARROW, i = 0; index <= IDS_HAND; index++, i++)
    {
        g_CursorData[i].hCursor = 0;
        g_CursorData[i].szCursorPath[0] = 0;
    }

    lError = RegOpenKeyEx(HKEY_CURRENT_USER,
                          _T("Control Panel\\Cursors"),
                          0,
                          KEY_READ | KEY_QUERY_VALUE,
                          &hCursorKey);
    if (lError != ERROR_SUCCESS)
        return;

    dwDataSize = sizeof(DWORD);
    lError = RegQueryValueEx(hCursorKey,
                             _T("Scheme Source"),
                             NULL,
                             NULL,
                             (LPBYTE)&dwSchemeSource,
                             &dwDataSize);

    if (dwSchemeSource != 0)
    {