VC++でCTreeCtrlサブアイテムItemのフォントと色を変更

//        、      ：
protected:
struct Color_Font
{
COLORREF color;
LOGFONT logfont;
}; 
//  CMap     Item     、    
CMap< void*, void*, Color_Font, Color_Font& > m_mapColorFont ;
//      、  、     
void CTreeCtrlX::SetItemFont(HTREEITEM hItem, LOGFONT& logfont)
{
Color_Font cf;
if( !m_mapColorFont.Lookup( hItem, cf ) )
cf.color = (COLORREF)-1;
cf.logfont = logfont;
m_mapColorFont[hItem] = cf;
}

void CTreeCtrlX::SetItemBold(HTREEITEM hItem, BOOL bBold)
{
SetItemState( hItem, bBold ? TVIS_BOLD: 0, TVIS_BOLD );
}

void CTreeCtrlX::SetItemColor(HTREEITEM hItem, COLORREF color)
{
Color_Font cf;
if( !m_mapColorFont.Lookup( hItem, cf ) )
cf.logfont.lfFaceName[0] = '\0';
cf.color = color;
m_mapColorFont[hItem] = cf;
}

BOOL CTreeCtrlX::GetItemFont(HTREEITEM hItem, LOGFONT * plogfont)
{
Color_Font cf;
if( !m_mapColorFont.Lookup( hItem, cf ) )
return FALSE;
if( cf.logfont.lfFaceName[0] == '\0' ) 
return FALSE;
*plogfont = cf.logfont;
return TRUE;

}

BOOL CTreeCtrlX::GetItemBold(HTREEITEM hItem)
{
return GetItemState( hItem, TVIS_BOLD ) & TVIS_BOLD;
}

COLORREF CTreeCtrlX::GetItemColor(HTREEITEM hItem)
{
// Returns (COLORREF)-1 if color was not set
Color_Font cf;
if( !m_mapColorFont.Lookup( hItem, cf ) )
return (COLORREF)-1;
return cf.color;

}
//  WM_PAINT     ，  OnPaint()       

afx_msg void CMyTreeCtrl::OnPaint()
{
//         DC
CPaintDC dc(this);

//           DC    memory DC
//memory device context   ：                  （    、  、
//    ）   。                  ，       ，    
//            。
CDC memDC;
//   DC      
memDC.CreateCompatibleDC( &dc );

//  CRect  ，      
CRect rcClip, rcClient;
//           
dc.GetClipBox( &rcClip );
//           
GetClientRect(&rcClient);

// Select a compatible bitmap into the memory DC
//    bmp  ，  memDC   
//             
CBitmap bitmap;
bitmap.CreateCompatibleBitmap( &dc, rcClient.Width(), rcClient.Height() );
memDC.SelectObject( &bitmap );

// Set clip region to be same as that in paint DC
//           CRgn  
CRgn rgn;
rgn.CreateRectRgnIndirect( &rcClip );
memDC.SelectClipRgn(&rgn);
rgn.DeleteObject();


// First let the control do its default drawing.
//              ，      
CWnd::DefWindowProc( WM_PAINT, (WPARAM)memDC.m_hDC, 0 );

//            
HTREEITEM hItem = GetFirstVisibleItem();

//     
int n = GetVisibleCount()+1;
while( hItem && n--)
{
CRect rect;

// Do not meddle with selected items or drop highlighted items
//                     
UINT selflag = TVIS_DROPHILITED | TVIS_SELECTED;

//    、  
Color_Font cf;


//    
if ( !(GetItemState( hItem, selflag ) & selflag )
&& m_mapColorFont.Lookup( hItem, cf ))
{
CFont *pFontDC;
CFont fontDC;
LOGFONT logfont;

if( cf.logfont.lfFaceName[0] != '\0' )
{
//       
logfont = cf.logfont;
}
else
{
//       ，      
CFont *pFont = GetFont();
pFont->GetLogFont( &logfont );
}

//           
if( GetItemBold( hItem ) )
logfont.lfWeight = 700;
//    
fontDC.CreateFontIndirect( &logfont );
pFontDC = memDC.SelectObject( &fontDC );

//      
if( cf.color != (COLORREF)-1 )
memDC.SetTextColor( cf.color );

//      
CString sItem = GetItemText( hItem );

//      
GetItemRect( hItem, &rect, TRUE );
//         
memDC.SetBkColor( GetSysColor( COLOR_WINDOW ) );
//           ,       
memDC.TextOut( rect.left+2, rect.top+1, sItem );

memDC.SelectObject( pFontDC );
}
hItem = GetNextVisibleItem( hItem );
}


dc.BitBlt( rcClip.left, rcClip.top, rcClip.Width(), rcClip.Height(), &memDC,
rcClip.left, rcClip.top, SRCCOPY );

}