shelltree.cpp

CAN__组建现场总线系统设计技术(光盘)

 ****************************************************************************/
void CShellTree::
GetNormalAndSelectedIcons (LPITEMIDLIST lpifq,
                           LPTV_ITEM lptvitem)
{
  //Note that we don't check the return value here because if GetIcon()
  //fails, then we're in big trouble...

  lptvitem->iImage = GetItemIcon (lpifq, SHGFI_PIDL |
                                  SHGFI_SYSICONINDEX |
                                  SHGFI_SMALLICON);

  lptvitem->iSelectedImage = GetItemIcon (lpifq, SHGFI_PIDL |
                                          SHGFI_SYSICONINDEX |
                                          SHGFI_SMALLICON |
                                          SHGFI_OPENICON);

  return;
}



/****************************************************************************
 *
 *    FUNCTION: TreeViewCompareProc(LPARAM, LPARAM, LPARAM)
 *
 *    PURPOSE:  Callback routine for sorting the tree
 *
 ****************************************************************************/
#pragma warning ( disable : 4100 )
int CALLBACK CShellTree::
TreeViewCompareProc (LPARAM lparam1,
                     LPARAM lparam2, LPARAM lparamSort)
{
  LPTVITEMDATA lptvid1 = (LPTVITEMDATA) lparam1;
  LPTVITEMDATA lptvid2 = (LPTVITEMDATA) lparam2;
  HRESULT hr;

  hr = lptvid1->lpsfParent->CompareIDs (0, lptvid1->lpi, lptvid2->lpi);

  if (FAILED (hr))
    return 0;

  return (short) SCODE_CODE (GetScode (hr));
}
#pragma warning ( default : 4100 )


void CShellTree::
DeleteChildren (HTREEITEM item)
{
  HTREEITEM child;

  child = GetChildItem (item);
  while (child)
    {
      if (GetChildItem (child))
        DeleteChildren (child);
      DeleteItem (child);
      child = GetChildItem (item);
    }
}


/////////////////////////////////////////////////////////////////////////////
// CShellTree message handlers

/****************************************************************************
 *
 *  FUNCTION:   OnFolderExpanding(NMHDR* pNMHDR, LRESULT* pResult)
 *
 *  PURPOSE:    Reponds to an TVN_ITEMEXPANDING message in order to fill up
 *              subdirectories. Pass the parameters from OnItemExpanding() to
 *              this function. You need to do that or your folders won't
 *              expand.
 *
 *  OTHER:      It can also be used to update a corresponding listview. Seem MFCENUM
 *
 *  MESSAGEMAP: TVN_ITEMEXPANDING
 *
 ****************************************************************************/
void CShellTree::
OnFolderExpanding (NMHDR * pNMHDR, LRESULT * pResult)
{
  LPTVITEMDATA lptvid;          //Long pointer to TreeView item data

  HRESULT hr;
  LPSHELLFOLDER lpsf2 = NULL;
  static TCHAR szBuff[MAX_PATH];
  TV_SORTCB tvscb;

  NM_TREEVIEW *pnmtv = (NM_TREEVIEW *) pNMHDR;
  if (m_flags & SHLT_REFRESHONEXPAND)
    {
      if ((pnmtv->itemNew.state & TVIS_EXPANDED) && GetChildItem (pnmtv->itemNew.hItem))
        {
          Expand (pnmtv->itemNew.hItem, TVE_COLLAPSE);
          DeleteChildren (pnmtv->itemNew.hItem);
          return;
        }
    }
  else
    {
      //:originally alone
      if ((pnmtv->itemNew.state & TVIS_EXPANDEDONCE))
        return;
    }
  lptvid = (LPTVITEMDATA) pnmtv->itemNew.lParam;
  if (lptvid)
    {
      hr = lptvid->lpsfParent->BindToObject (lptvid->lpi,
                                             0, IID_IShellFolder, (LPVOID *) & lpsf2);

      if (SUCCEEDED (hr))
        {
          FillTreeView (lpsf2,
                        lptvid->lpifq,
                        pnmtv->itemNew.hItem);
        }

      tvscb.hParent = pnmtv->itemNew.hItem;
      tvscb.lParam = 0;
      tvscb.lpfnCompare = TreeViewCompareProc;

      SortChildrenCB (&tvscb /*, FALSE */ );
    }
  *pResult = 0;
}

/****************************************************************************
 *
 *  FUNCTION:   GetContextMenu(NMHDR* pNMHDR, LRESULT* pResult)
 *
 *  PURPOSE:    Diplays a popup menu for the folder selected. Pass the
 *              parameters from Rclick() to this function.
 *
 *  MESSAGEMAP: NM_RCLICK;
 *
 ****************************************************************************/
#pragma warning ( disable : 4100 )
void CShellTree::
GetContextMenu (NMHDR * pNMHDR, LRESULT * pResult)
{
  // TODO: Add your control notification handler code here
  POINT pt;
  LPTVITEMDATA lptvid;          //Long pointer to TreeView item data

  LPSHELLFOLDER lpsf2 = NULL;
  static TCHAR szBuff[MAX_PATH];
  TV_HITTESTINFO tvhti;
  TV_ITEM tvi;

  // TODO: Add your control notification handler code here
  ::GetCursorPos ((LPPOINT) & pt);
  ScreenToClient (&pt);
  tvhti.pt = pt;
  HitTest (&tvhti);
  // SelectItem(tvhti.hItem);
  if (tvhti.flags & (TVHT_ONITEMLABEL | TVHT_ONITEMICON))
    {
      ClientToScreen (&pt);
      tvi.mask = TVIF_PARAM;
      tvi.hItem = tvhti.hItem;

      if (!GetItem (&tvi))
        {
          return;
        }

      lptvid = (LPTVITEMDATA) tvi.lParam;

      DoTheMenuThing (::GetParent (m_hWnd),
                      lptvid->lpsfParent, lptvid->lpi, &pt);
    }

  *pResult = 0;
}
#pragma warning ( default : 4100 )

/****************************************************************************
 *
 *  FUNCTION:   OnFolderSelected(NMHDR* pNMHDR, LRESULT* pResult, CString &szFolderPath)
 *
 *  PURPOSE:    Call this function if for example you want to put the path of the folder
 *              selected inside a combobox or an edit window. You would pass the
 *              parameters from OnSelChanged() to this function along with a CString object
 *              that will hold the folder path. If the path is not
 *              in the filesystem(eg MyComputer) it returns false.
 *
 *  MESSAGEMAP: TVN_SELCHANGED
 *
 ****************************************************************************/
BOOL CShellTree::
OnFolderSelected (NMHDR * pNMHDR, LRESULT * pResult, CString & szFolderPath)
{
  // TODO: Add your control notification handler code here
  LPTVITEMDATA lptvid;          //Long pointer to TreeView item data

  LPSHELLFOLDER lpsf2 = NULL;
  static TCHAR szBuff[MAX_PATH];
  HRESULT hr;
  BOOL bRet = false;
  TV_SORTCB tvscb;
  HTREEITEM hItem = NULL;

  if ((hItem = GetSelectedItem ()) != NULL)
    {
      lptvid = (LPTVITEMDATA) GetItemData (hItem);

      if (lptvid && lptvid->lpsfParent && lptvid->lpi)
        {
          hr = lptvid->lpsfParent->BindToObject (lptvid->lpi,
                                                 0, IID_IShellFolder, (LPVOID *) & lpsf2);

          if (SUCCEEDED (hr))
            {
              ULONG ulAttrs = SFGAO_FILESYSTEM;

              // Determine what type of object we have.
              lptvid->lpsfParent->GetAttributesOf (1, (const struct _ITEMIDLIST **) &lptvid->lpi, &ulAttrs);

              if (ulAttrs & (SFGAO_FILESYSTEM))
                {
                  if (SHGetPathFromIDList (lptvid->lpifq, szBuff))
                    {
                      szFolderPath = szBuff;
                      bRet = true;
                    }
                }
              //non standard from here(NEW CODE)
              NM_TREEVIEW *pnmtv = (NM_TREEVIEW *) pNMHDR;
              if ((pnmtv->itemNew.cChildren == 1) && !(pnmtv->itemNew.state & TVIS_EXPANDEDONCE))
                {
                  FillTreeView (lpsf2, lptvid->lpifq, pnmtv->itemNew.hItem);

                  tvscb.hParent = pnmtv->itemNew.hItem;
                  tvscb.lParam = 0;
                  tvscb.lpfnCompare = TreeViewCompareProc;
                  SortChildrenCB (&tvscb);

                  pnmtv->itemNew.state |= TVIS_EXPANDEDONCE;
                  pnmtv->itemNew.stateMask |= TVIS_EXPANDEDONCE;
                  pnmtv->itemNew.mask |= TVIF_STATE;
                  SetItem (&pnmtv->itemNew);
                }
            }

        }
      if (lpsf2)
        lpsf2->Release ();

    }
  *pResult = 0;
  return bRet;
}

/****************************************************************************
 *
 *  FUNCTION:   OnDeleteShellItem(NMHDR* pNMHDR, LRESULT* pResult)
 *
 *  PURPOSE:    Releases the memory allocated by the shell folders
 *
 *  MESSAGEMAP: TVN_DELETEITEM
 *
 *  MISC:       failure to call this function will result in a memory leak
 *
 ****************************************************************************/
#pragma warning ( disable : 4100 )
void CShellTree::
OnDeleteShellItem (NMHDR * pNMHDR, LRESULT * pResult)
{
  LPTVITEMDATA lptvid = NULL;
  HRESULT hr;
  LPMALLOC lpMalloc;

  NM_TREEVIEW *pNMTreeView = (NM_TREEVIEW *) pNMHDR;

  //Let's free the memory for the TreeView item data...
  hr = SHGetMalloc (&lpMalloc);
  if (FAILED (hr))
    return;

  lptvid = (LPTVITEMDATA) pNMTreeView->itemOld.lParam;
  lptvid->lpsfParent->Release ();
  lpMalloc->Free (lptvid->lpi);
  lpMalloc->Free (lptvid->lpifq);
  lpMalloc->Free (lptvid);
  lpMalloc->Release ();
}
#pragma warning ( default : 4100 )

/****************************************************************************
 *
 *  FUNCTION:   EnableImages()
 *
 *  PURPOSE:    Obtains a handle to the system image list and attaches it
 *              to the tree control. DO NOT DELETE the imagelist
 *
 *  MESSAGEMAP: NONE
 *
 ****************************************************************************/
void CShellTree::
EnableImages ()
{
  // Get the handle to the system image list, for our icons
  HIMAGELIST hImageList;
  SHFILEINFO sfi;

  hImageList = (HIMAGELIST) SHGetFileInfo ((LPCTSTR) _T ("C:\\"),
               0,
               &sfi,
               sizeof (SHFILEINFO),
               SHGFI_SYSICONINDEX | SHGFI_SMALLICON);

  // Attach ImageList to TreeView
  if (hImageList)
    ::SendMessage (m_hWnd, TVM_SETIMAGELIST, (WPARAM) TVSIL_NORMAL,
                   (LPARAM) hImageList);
}

/****************************************************************************
 *
 *  FUNCTION:   GetPointedFolderPath( const CPoint & point, CString &szFolderPath )
 *
 *  PURPOSE:    Retrieves the path of the currently pointed string.
 *              Pass a CString object that will hold the folder path.
 *              If the path is not in the filesystem(eg MyComputer)
 *              or none is selected it returns false.
 *
 *  MESSAGEMAP: NONE
 *
 ****************************************************************************/
BOOL CShellTree::
GetPointedFolderPath (const CPoint & point, CString & szFolderPath)
{
  LPTVITEMDATA lptvid;          //Long pointer to TreeView item data

  LPSHELLFOLDER lpsf2 = NULL;
  static TCHAR szBuff[MAX_PATH];
  HTREEITEM hItem = NULL;
  HRESULT hr;
  BOOL bRet = false;
  TV_HITTESTINFO tvhti;

  tvhti.pt = point;
  HitTest (&tvhti);
  if (tvhti.flags & (TVHT_ONITEMLABEL | TVHT_ONITEMICON))
    {
      hItem = tvhti.hItem;
    }
  if (hItem)
    {
      lptvid = (LPTVITEMDATA) GetItemData (hItem);

      if (lptvid && lptvid->lpsfParent && lptvid->lpi)
        {
          hr = lptvid->lpsfParent->BindToObject (lptvid->lpi,
                                                 0, IID_IShellFolder, (LPVOID *) & lpsf2);

          if (SUCCEEDED (hr))
            {
              ULONG ulAttrs = SFGAO_FILESYSTEM;

              // Determine what type of object we have.
              lptvid->lpsfParent->GetAttributesOf (1, (const struct _ITEMIDLIST **) &lptvid->lpi, &ulAttrs);

              if (ulAttrs & (SFGAO_FILESYSTEM))
                {
                  if (SHGetPathFromIDList (lptvid->lpifq, szBuff))
                    {
                      szFolderPath = szBuff;
                      bRet = true;
                    }
                }
            }
          else
            {
              if (lpsf2)
                lpsf2->Release ();
              HTREEITEM hItem2 = GetParentItem (hItem);

              if (hItem2)
                {
                  lptvid = (LPTVITEMDATA) GetItemData (hItem2);

                  if (lptvid && lptvid->lpsfParent && lptvid->lpi)
                    {
                      hr = lptvid->lpsfParent->BindToObject (lptvid->lpi,
                                                             0, IID_IShellFolder, (LPVOID *) & lpsf2);

                      if (SUCCEEDED (hr))
                        {
                          ULONG ulAttrs = SFGAO_FILESYSTEM;

                          // Determine what type of object we have.
                          lptvid->lpsfParent->GetAttributesOf (1, (const struct _ITEMIDLIST **) &lptvid->lpi, &ulAttrs);

                          if (ulAttrs & (SFGAO_FILESYSTEM))
                            {
                              if (SHGetPathFromIDList (lptvid->lpifq, szBuff))
                                {
                                  CString item = GetItemText (hItem);

                                  szFolderPath = szBuff[_tcslen (szBuff) - 1] == _T ('\\') ? szBuff + item : CString (szBuff) + _T ("\\") + item;
                                  bRet = true;
                                }
                            }