www.pudn.com > TreePropSheetEx.rar > HighColorTab.hpp

// HighColorTab.hpp 
// 
// Author:  Yves Tkaczyk (yves@tkaczyk.net) 
// 
// This software is released into the public domain.  You are free to use it  
// in any way you like BUT LEAVE THIS HEADER INTACT. 
// 
// This software is provided "as is" with no expressed or implied warranty.   
// I accept no liability for any damage or loss of business that this software  
// may cause. 
// 
/////////////////////////////////////////////////////////////////////////////// 
 
#ifndef _HIGHCOLORTAB_HPP_INCLUDED_ 
#define _HIGHCOLORTAB_HPP_INCLUDED_ 
 
#if _MSC_VER > 1000 
#pragma once 
#endif // _MSC_VER > 1000 
 
#include  
 
namespace HighColorTab 
{ 
  /*! \brief Policy class for creating image list.  
 
    Policy for creating a high color (32 bits) image list. The policy  
    ensure that there is a Win32 image list associated with the CImageList. 
    If this is not the case, a NULL pointer shall be returned.  
 
    Returned image list is wrapped in an std::auto_ptr. 
     
    \sa UpdateImageListFull  */ 
  struct CHighColorListCreator 
  { 
    /*! Create the image list. 
        \retval std::auto_ptr Not null if success. */ 
    static std::auto_ptr CreateImageList() 
    { 
      std::auto_ptr apILNew( new CImageList() ); 
      if( NULL == apILNew.get() ) 
      { 
        // ASSERT: The CImageList object creation failed. 
        ASSERT( FALSE ); 
        return std::auto_ptr(); 
      } 
 
      if( 0 == apILNew->Create( 16, 16, ILC_COLOR32|ILC_MASK, 0, 1 ) ) 
      { 
        // ASSERT: The image list (Win32) creation failed. 
        ASSERT( FALSE ); 
        return std::auto_ptr(); 
      } 
 
      return apILNew; 
    } 
  }; 
 
 
 
  /*! \brief Change the image list of the provided control (property sheet interface) 
 
    This method provides full customization via policy over image list creation. The policy 
    must have a method with the signature: 
    static std::auto_ptr CreateImageList() 
 
    \author Yves Tkaczyk (yves@tkaczyk.net) 
    \date 02/2004 */ 
  template 
    bool UpdateImageListFull(TSheet& rSheet) 
  { 
	  // Get the tab control... 
	  CTabCtrl* pTab = rSheet.GetTabControl(); 
	  if (!IsWindow(pTab->GetSafeHwnd())) 
	  { 
      // ASSERT: Tab control could not be retrieved or it is not a valid window. 
      ASSERT( FALSE ); 
		  return false; 
	  } 
 
    // Create the replacement image list via policy. 
    std::auto_ptr apILNew( TListCreator::CreateImageList() ); 
 
    bool bSuccess = (NULL != apILNew.get() ); 
 
    // Reload the icons from the property pages. 
    int nTotalPageCount = rSheet.GetPageCount(); 
    for(int nCurrentPage = 0; nCurrentPage < nTotalPageCount && bSuccess; ++nCurrentPage ) 
    { 
      // Get the page. 
      CPropertyPage* pPage = rSheet.GetPage( nCurrentPage ); 
      ASSERT( pPage ); 
      // Set the icon in the image list from the page properties. 
      if( pPage && ( pPage->m_psp.dwFlags & PSP_USEHICON ) ) 
      { 
        bSuccess &= ( -1 != apILNew->Add( pPage->m_psp.hIcon ) ); 
      } 
 
      if( pPage && ( pPage->m_psp.dwFlags & PSP_USEICONID ) ) 
      { 
        bSuccess &= ( -1 != apILNew->Add( AfxGetApp()->LoadIcon( pPage->m_psp.pszIcon ) ) ); 
      } 
    } 
 
    if( !bSuccess ) 
    { 
      // This ASSERT because either the image list could not be created or icon insertion failed. 
      ASSERT( FALSE ); 
      // Cleanup what we have in the new image list. 
      if( apILNew.get() ) 
      { 
        apILNew->DeleteImageList(); 
      } 
 
      return false; 
    } 
 
    // Replace the image list from the tab control. 
    CImageList* pilOld = pTab->SetImageList( CImageList::FromHandle( apILNew->Detach() ) ); 
    // Clean the old image list if there was one. 
    if( pilOld ) 
    { 
      pilOld->DeleteImageList(); 
    } 
        
    return true; 
  }; 
 
  /*! \brief Change the image list of the provided control (property sheet) 
 
    This method uses 32 bits image list creation default policy. */ 
  template 
    bool UpdateImageList(TSheet& rSheet) 
  { 
    return UpdateImageListFull( rSheet ); 
  }; 
}; 
 
#endif // _HIGHCOLORTAB_HPP_INCLUDED_