shfileinfo.cpp

一个完整的编辑器的代码（很值得参考

#include "stdafx.h"
#include "shfileinfo.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

////////////////////////////////////////////////////////////////////////////////
// CSHFileInfo

CSHFileInfo::CSHFileInfo (LPCTSTR lpszFileName)
{
  m_strFileName = lpszFileName;
  _tsplitpath (m_strFileName, m_szDrive, m_szDir, m_szFname, m_szExt);
}

CSHFileInfo::CSHFileInfo (CFileFind * pFoundFile)
{
  m_pFoundFile = pFoundFile;
  m_strFileName = m_pFoundFile->GetFilePath ();
  _tsplitpath (m_strFileName, m_szDrive, m_szDir, m_szFname, m_szExt);
}

CSHFileInfo:: ~ CSHFileInfo ()
{
  // TODO: add destruction code here.
}

///////////////////////////////////////////////////////////////////
//  Function:   GetFileName()
//  Purpose:    Retrieves current filename minus the path
//  Remarks:    if the filename is "c:\incoming\hello.txt", this
//              function returns "hello.txt".
///////////////////////////////////////////////////////////////////
CString CSHFileInfo::
GetFileName ()
{
  CString str;
  str.Format (_T ("%s%s"), m_szFname, m_szExt);
  return str;
}

///////////////////////////////////////////////////////////////////
//  Function:   GetRoot()
//  Purpose:    Retrieves the path only of the current filename.
//  Remarks:    if the filename is "c:\incoming\hello.txt", this
//              function returns "c:\incoming\".
///////////////////////////////////////////////////////////////////
CString CSHFileInfo::
GetRoot ()
{
  CString str;
  str.Format (_T ("%s%s"), m_szDrive, m_szDir);
  return str;
}

///////////////////////////////////////////////////////////////////
//  Function:   GetFileTitle()
//  Purpose:    Retrieves the title of the filename excluding
//              the path and extension.
//  Remarks:    if the filename is "c:\incoming\hello.txt", this
//              function returns "hello".
///////////////////////////////////////////////////////////////////
CString CSHFileInfo::
GetFileTitle ()
{
  return m_szFname;
}

///////////////////////////////////////////////////////////////////
//  Function:   GetFileExt()
//  Purpose:    Retrieves the file extension.
//  Remarks:    if the filename is "c:\incoming\hello.txt", this
//              function returns "txt".
///////////////////////////////////////////////////////////////////
CString CSHFileInfo::
GetFileExt ()
{
  return m_szExt;
}

///////////////////////////////////////////////////////////////////
//  Function:   GetDescription()
//  Purpose:    Returns the description of the file
///////////////////////////////////////////////////////////////////
CString CSHFileInfo::
GetDescription ()
{
  SHFILEINFO sfi;

  ::SHGetFileInfo (m_strFileName, 0, &sfi,
                   sizeof (SHFILEINFO), SHGFI_TYPENAME);

  return sfi.szTypeName;
}

///////////////////////////////////////////////////////////////////
//  Function:   Exists()
//  Purpose:    Determines whether a file or directory exists.
///////////////////////////////////////////////////////////////////
bool CSHFileInfo::
Exist ()
{
  WIN32_FIND_DATA fd;

  CString szFindPath = m_strFileName;
  int nSlash = szFindPath.ReverseFind (_T ('\\'));
  int nLength = szFindPath.GetLength ();

  if (nSlash == nLength - 1)
    {
      if (nLength == 3)
        if (szFindPath.GetAt (1) == _T (':'))
          return true;
        else
          szFindPath = szFindPath.Left (nSlash);
    }

  HANDLE hFind = FindFirstFile (szFindPath, &fd);

  if (hFind != INVALID_HANDLE_VALUE)
    FindClose (hFind);

  return hFind != INVALID_HANDLE_VALUE;
}

///////////////////////////////////////////////////////////////////
//  Function:   GetIconIndex()
//  Purpose:    Returns the icon index of the file.
///////////////////////////////////////////////////////////////////
int CSHFileInfo::
GetIconIndex ()
{
  SHFILEINFO sfi;

  ::SHGetFileInfo (m_strFileName, 0, &sfi, sizeof (SHFILEINFO),
                   SHGFI_SYSICONINDEX | SHGFI_SMALLICON);

  return sfi.iIcon;
}

///////////////////////////////////////////////////////////////////
//  Function:   GetDisplayName()
//  Purpose:    Returns the display name for the file.
///////////////////////////////////////////////////////////////////
CString CSHFileInfo::
GetDisplayName ()
{
  SHFILEINFO sfi;

  ::SHGetFileInfo (m_strFileName, 0, &sfi,
                   sizeof (SHFILEINFO), SHGFI_DISPLAYNAME);

  return sfi.szDisplayName;
}

///////////////////////////////////////////////////////////////////
//  Function:   GetLastWriteTime()
//  Purpose:    Returns the last time file was written to.
///////////////////////////////////////////////////////////////////
CString CSHFileInfo::
GetLastWriteTime ()
{
  CString strTime;
  CTime time;
  m_pFoundFile->GetLastWriteTime (time);

  // Format the date time string.
  strTime.Format (_T ("%.2d/%.2d/%d %.2d:%.2d"), time.GetMonth (), time.GetDay (),
                  time.GetYear (), time.GetHour (), time.GetSecond ());

  return strTime;
}

///////////////////////////////////////////////////////////////////
//  Function:   GetFileSize()
//  Purpose:    Returns the comma seperated size of the file.
///////////////////////////////////////////////////////////////////
CString CSHFileInfo::
GetFileSize ()
{
  CString strFileSize;
  CString strTemp;

  strTemp.Format (_T ("%d"), m_pFoundFile->GetLength ());
  int nSize = strTemp.GetLength () - 1;
  int nCount = 1;

  while (nSize >= 0)
    {
      strFileSize += strTemp.GetAt (nSize);

      if (nSize == 0)
        break;
      if (nCount != 3)
        ++nCount;

      else
        {
          strFileSize += _T (",");
          nCount = 1;
        }
      nSize--;
    }

  strFileSize.MakeReverse ();
  return strFileSize;
}

///////////////////////////////////////////////////////////////////
//  Function:   GetSystemImageList()
//  Purpose:    Returns the system image list for small and large icons.
///////////////////////////////////////////////////////////////////
void CSHFileInfo::
GetSystemImageList (CImageList * pSmallList, CImageList * pLargeList)
{
  //image list setup
  SHFILEINFO ssfi, lsfi;

  // Get a handle to the system small icon list
  HIMAGELIST hSystemSmallImageList = (HIMAGELIST)
                                     ::SHGetFileInfo ((LPCTSTR) _T ("C:\\"), 0, &ssfi,
                                                      sizeof (SHFILEINFO), SHGFI_SYSICONINDEX | SHGFI_SMALLICON);

  // Attach it to the small image list
  // DON'T FORGET TO PUT pSmallList->Detach(); in your destructor
  pSmallList->Attach (hSystemSmallImageList);

  // Get a handle to the system large icon list
  HIMAGELIST hSystemLargeImageList = (HIMAGELIST)
                                     ::SHGetFileInfo ((LPCTSTR) _T ("C:\\"), 0, &lsfi,
                                                      sizeof (SHFILEINFO), SHGFI_SYSICONINDEX | SHGFI_ICON);

  // Attach it to the large image list
  // DON'T FORGET TO PUT pLargeList->Detach(); in your destructor
  pLargeList->Attach (hSystemLargeImageList);
}

//////////////////////////////////////////////////////////////////////
// SHBrowseForFolder callback...
//////////////////////////////////////////////////////////////////////
#pragma warning ( disable : 4100 )
static int __stdcall
BrowseCtrlCallback (HWND hwnd, UINT uMsg, LPARAM lParam, LPARAM lpData)
{
  CSHFileInfo *pShellFileInfo = (CSHFileInfo *) lpData;

  if (uMsg == BFFM_INITIALIZED && !pShellFileInfo->m_strSelDir.IsEmpty ())
    {
      ::SendMessage (hwnd, BFFM_SETSELECTION, TRUE, (LPARAM) (LPCTSTR) (pShellFileInfo->m_strSelDir));
    }
  else                          // uMsg == BFFM_SELCHANGED

    {
    }

  return FALSE;
}
#pragma warning ( default : 4100 )

///////////////////////////////////////////////////////////////////
//  Function:   BrowseForFolder()
//  Purpose:    Displays browse for folder dialog.
///////////////////////////////////////////////////////////////////
BOOL CSHFileInfo::
BrowseForFolder (CWnd * pParentWnd)
{
  LPMALLOC pMalloc;
  if (::SHGetMalloc (&pMalloc) != NOERROR)
    return FALSE;

  BROWSEINFO bInfo;
  LPITEMIDLIST pidl;
  ZeroMemory ((PVOID) & bInfo, sizeof (BROWSEINFO));

  if (!m_strInitDir.IsEmpty ())
    {
      OLECHAR olePath[MAX_PATH];
      ULONG chEaten;
      ULONG dwAttributes;
      HRESULT hr;
      LPSHELLFOLDER pDesktopFolder;
      //
      // Get a pointer to the Desktop's IShellFolder interface.
      //
      if (SUCCEEDED (SHGetDesktopFolder (&pDesktopFolder)))
        {
          //
          // IShellFolder::ParseDisplayName requires the file name be in Unicode.
          //
#ifdef _UNICODE
          _tcscpy (olePath, m_strInitDir);
#else // _UNICODE
          MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, m_strInitDir.GetBuffer (MAX_PATH), -1,
                               olePath, MAX_PATH);
#endif // _UNICODE

          m_strInitDir.ReleaseBuffer (-1);
          //
          // Convert the path to an ITEMIDLIST.
          //
          hr = pDesktopFolder->ParseDisplayName (NULL,
                                                 NULL,
                                                 olePath,
                                                 &chEaten,
                                                 &pidl,
                                                 &dwAttributes);
          if (FAILED (hr))
            {
              pMalloc->Free (pidl);
              pMalloc->Release ();
              return FALSE;
            }
          bInfo.pidlRoot = pidl;

        }
    }

  bInfo.hwndOwner = pParentWnd->GetSafeHwnd ();
  bInfo.pszDisplayName = m_strPath.GetBuffer (MAX_PATH);
  bInfo.lpszTitle = (m_strTitle.IsEmpty ())? _T ("Open") : m_strTitle;
  bInfo.ulFlags = BIF_RETURNFSANCESTORS | BIF_RETURNONLYFSDIRS;
  bInfo.lpfn = BrowseCtrlCallback;  // address of callback function

  bInfo.lParam = (LPARAM) this; // pass address of object to callback function

  if ((pidl =::SHBrowseForFolder (&bInfo)) == NULL)
    {
      return FALSE;
    }
  m_strPath.ReleaseBuffer ();
  m_iImageIndex = bInfo.iImage;

  if (::SHGetPathFromIDList (pidl, m_strPath.GetBuffer (MAX_PATH)) == FALSE)
    {
      pMalloc->Free (pidl);
      pMalloc->Release ();
      return FALSE;
    }

  m_strPath.ReleaseBuffer ();

  pMalloc->Free (pidl);
  pMalloc->Release ();

  return TRUE;
}

////////////////////////////////////////////////////////////////////////////////