EXTRICON.CPP

/************************************************************************** 
   THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF 
   ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO 
   THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A 
   PARTICULAR PURPOSE. 
 
   Copyright 1997 Microsoft Corporation.  All Rights Reserved. 
**************************************************************************/ 
 
/************************************************************************** 
 
   File:          ExtrIcon.cpp 
    
   Description:   Implements CExtractIcon. 
 
**************************************************************************/ 
 
/************************************************************************** 
   #include statements 
**************************************************************************/ 
 
#include "ExtrIcon.h" 
 
/************************************************************************** 
 
   CExtractIcon::CExtractIcon() 
 
**************************************************************************/ 
 
CExtractIcon::CExtractIcon(LPCITEMIDLIST pidl) 
{ 
m_pPidlMgr = new CPidlMgr(); 
if(!m_pPidlMgr) 
   { 
   delete this; 
   return; 
   } 
 
m_pidl = m_pPidlMgr->Copy(pidl); 
 
m_ObjRefCount = 1; 
 
g_DllRefCount++; 
} 
 
/************************************************************************** 
 
   CExtractIcon::~CExtractIcon() 
 
**************************************************************************/ 
 
CExtractIcon::~CExtractIcon() 
{ 
if(m_pidl) 
   { 
   m_pPidlMgr->Delete(m_pidl); 
   m_pidl = NULL; 
   } 
 
if(m_pPidlMgr) 
   { 
   delete m_pPidlMgr; 
   } 
 
g_DllRefCount--; 
} 
 
/////////////////////////////////////////////////////////////////////////// 
// 
// IUnknown Implementation 
// 
 
/************************************************************************** 
 
   CExtractIcon::QueryInterface 
 
**************************************************************************/ 
 
STDMETHODIMP CExtractIcon::QueryInterface(REFIID riid, LPVOID *ppReturn) 
{ 
*ppReturn = NULL; 
 
//IUnknown 
if(IsEqualIID(riid, IID_IUnknown)) 
   { 
   *ppReturn = this; 
   } 
 
//IExtractIcon 
else if(IsEqualIID(riid, IID_IExtractIcon)) 
   { 
   *ppReturn = (IExtractIcon*)this; 
   } 
 
if(*ppReturn) 
   { 
   (*(LPUNKNOWN*)ppReturn)->AddRef(); 
   return S_OK; 
   } 
 
return E_NOINTERFACE; 
}                                              
 
/************************************************************************** 
 
   CExtractIcon::AddRef 
 
**************************************************************************/ 
 
STDMETHODIMP_(DWORD) CExtractIcon::AddRef() 
{ 
return ++m_ObjRefCount; 
} 
 
/************************************************************************** 
 
   CExtractIcon::Release 
 
**************************************************************************/ 
 
STDMETHODIMP_(DWORD) CExtractIcon::Release() 
{ 
if(--m_ObjRefCount == 0) 
   { 
   delete this; 
   return 0; 
   } 
    
return m_ObjRefCount; 
} 
 
/////////////////////////////////////////////////////////////////////////// 
// 
// IExtractIcon Implementation 
// 
 
/************************************************************************** 
 
   CExtractIcon::GetIconLocation() 
    
**************************************************************************/ 
 
STDMETHODIMP CExtractIcon::GetIconLocation(  UINT uFlags,  
                                             LPTSTR szIconFile,  
                                             UINT cchMax,  
                                             LPINT piIndex,  
                                             LPUINT puFlags) 
{ 
//tell the shell to always call Extract 
*puFlags = GIL_NOTFILENAME; 
 
//the pidl is either a value or a folder, so find out which it is 
if(m_pPidlMgr->IsValue(m_pPidlMgr->GetLastItem(m_pidl))) 
   { 
   //its a value 
   DWORD dwType; 
 
   //get the data type to determine which icon to get 
   m_pPidlMgr->GetValueType(m_pidl, &dwType); 
 
   switch(dwType) 
      { 
      case REG_BINARY: 
      case REG_DWORD: 
      case REG_DWORD_BIG_ENDIAN: 
         *piIndex = ICON_INDEX_BINARY; 
         break; 
 
      default: 
         *piIndex = ICON_INDEX_STRING; 
         break; 
         } 
   } 
else 
   { 
   //its a key 
   if(uFlags & GIL_OPENICON) 
      { 
      *piIndex = ICON_INDEX_FOLDEROPEN;  //tell Extract to return the open icon 
      } 
   else 
      { 
      *piIndex = ICON_INDEX_FOLDER;  //tell Extract to return the open icon 
      } 
   } 
 
return S_OK; 
} 
 
/************************************************************************** 
 
   CExtractIcon::Extract() 
    
**************************************************************************/ 
 
STDMETHODIMP CExtractIcon::Extract( LPCTSTR pszFile,  
                                    UINT nIconIndex,  
                                    HICON *phiconLarge,  
                                    HICON *phiconSmall,  
                                    UINT nIconSize) 
{ 
*phiconLarge = ImageList_GetIcon(g_himlLarge, nIconIndex, ILD_TRANSPARENT); 
*phiconSmall = ImageList_GetIcon(g_himlSmall, nIconIndex, ILD_TRANSPARENT); 
 
/* 
if(nIconIndex) 
   { 
   *phiconLarge = ImageList_GetIcon(g_himlLarge, ICON_INDEX_FOLDEROPEN, ILD_TRANSPARENT); 
   *phiconSmall = ImageList_GetIcon(g_himlSmall, ICON_INDEX_FOLDEROPEN, ILD_TRANSPARENT); 
   } 
else 
   { 
   *phiconLarge = ImageList_GetIcon(g_himlLarge, ICON_INDEX_FOLDER, ILD_TRANSPARENT); 
   *phiconSmall = ImageList_GetIcon(g_himlSmall, ICON_INDEX_FOLDER, ILD_TRANSPARENT); 
   } 
*/ 
return S_OK; 
}