C++--CSplitterWnd::CreateView创建CListView创建过程的调试摘抄

一、调用过程

1 Call CObject* CRuntimeClass::CreateObject()

1.1 Call CObject::operator new(size_t nSize, LPCSTR lpszFileName, int nLine)

1.2 Call CCtrlView::CCtrlView(LPCTSTR lpszClass, DWORD dwStyle)

1.2.1 CCtrlView::CCtrlView(LPCTSTR lpszClass, DWORD dwStyle) 

1.2.1.1..........

1.2.2 Call CCtrlView::CCtrlView(LPCTSTR lpszClass, DWORD dwStyle)'code

2 DWORD dwStyle = AFX_WS_DEFAULT_VIEW & ~WS_BORDER;

  Call pWnd->Create(NULL, NULL, dwStyle,rect, this, IdFromRowCol(row, col), pContext)

2.1 CWnd::CreateEx

2.1.1 构造默认CREATESTRUCT cs

2.1.2 BOOL CListView::PreCreateWindow(CREATESTRUCT& cs)

2.1.2.1 BOOL CCtrlView::PreCreateWindow(CREATESTRUCT& cs)

2.1.2.1.1 cs.lpszClass = "SysListView32"

          if ((cs.style | WS_BORDER) == AFX_WS_DEFAULT_VIEW)

  cs.style = m_dwDefaultStyle & (cs.style | ~WS_BORDER);

2.1.2.1.2 return CView::PreCreateWindow(cs);

2.1.3 call CreateWindowEx API

2.1.3.1 Before returning, CreateWindow sends a WM_CREATE message to the window procedure,

         CWnd::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)

2.1.3.1.1// allow other subclassing to occur first

   pWndInit->PreSubclassWindow();

2.1.3.1.2 根据消息映射调用int CListView::OnCreate(LPCREATESTRUCT lpcs) 

二、CreateView代码摘抄

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

// CSplitterWnd default creation of parts

// You must create ALL panes unless DYNAMIC_SPLIT is defined!

//  Usually the splitter window is invisible when creating a pane

BOOL CSplitterWnd::CreateView(int row, int col,

 CRuntimeClass* pViewClass, SIZE sizeInit, CCreateContext* pContext)

{

#ifdef _DEBUG

 ASSERT_VALID(this);

 ASSERT(row >= 0 && row < m_nRows);

 ASSERT(col >= 0 && col < m_nCols);

 ASSERT(pViewClass != NULL);

 ASSERT(pViewClass->IsDerivedFrom(RUNTIME_CLASS(CWnd)));

 ASSERT(AfxIsValidAddress(pViewClass, sizeof(CRuntimeClass), FALSE));

 if (GetDlgItem(IdFromRowCol(row, col)) != NULL)

 {

  TRACE(traceAppMsg, 0, "Error: CreateView - pane already exists for row %d, col %d./n",

   row, col);

  ASSERT(FALSE);

  return FALSE;

 }

#endif

 // set the initial size for that pane

 m_pColInfo[col].nIdealSize = sizeInit.cx;

 m_pRowInfo[row].nIdealSize = sizeInit.cy;

 BOOL bSendInitialUpdate = FALSE;

 CCreateContext contextT;

 if (pContext == NULL)

  // if no context specified, generate one from the currently selected

  //  client if possible

  CView* pOldView = (CView*)GetActivePane();

  if (pOldView != NULL && pOldView->IsKindOf(RUNTIME_CLASS(CView)))

  {

   // set info about last pane

   ASSERT(contextT.m_pCurrentFrame == NULL);

   contextT.m_pLastView = pOldView;

   contextT.m_pCurrentDoc = pOldView->GetDocument();

   if (contextT.m_pCurrentDoc != NULL)

    contextT.m_pNewDocTemplate =

      contextT.m_pCurrentDoc->GetDocTemplate();

  }

  pContext = &contextT;

  bSendInitialUpdate = TRUE;

 CWnd* pWnd;

 TRY

  pWnd = (CWnd*)pViewClass->CreateObject();

  if (pWnd == NULL)

   AfxThrowMemoryException();

 CATCH_ALL(e)

  TRACE(traceAppMsg, 0, "Out of memory creating a splitter pane./n");

  // Note: DELETE_EXCEPTION(e) not required

 END_CATCH_ALL

 ASSERT_KINDOF(CWnd, pWnd);

 ASSERT(pWnd->m_hWnd == NULL);       // not yet created

 DWORD dwStyle = AFX_WS_DEFAULT_VIEW & ~WS_BORDER;

 // Create with the right size (wrong position)

 CRect rect(CPoint(0,0), sizeInit);

 if (!pWnd->Create(NULL, NULL, dwStyle,

  rect, this, IdFromRowCol(row, col), pContext))

  TRACE(traceAppMsg, 0, "Warning: couldn't create client pane for splitter./n");

   // pWnd will be cleaned up by PostNcDestroy

 ASSERT((int)_AfxGetDlgCtrlID(pWnd->m_hWnd) == IdFromRowCol(row, col));

 // send initial notification message

 if (bSendInitialUpdate)

  pWnd->SendMessage(WM_INITIALUPDATE);

 return TRUE;

}

三、其他相关代码摘抄

CObject* CRuntimeClass::CreateObject()

 ENSURE(this);

 if (m_pfnCreateObject == NULL)

  TRACE(traceAppMsg, 0,

   _T("Error: Trying to create object which is not ")

   _T("DECLARE_DYNCREATE /nor DECLARE_SERIAL: %hs./n"),

   m_lpszClassName);

  return NULL;

 CObject* pObject = NULL;

  pObject = (*m_pfnCreateObject)();//Call New Operator and Constructor

 END_TRY

 return pObject;

CObject::operator new(size_t nSize, LPCSTR lpszFileName, int nLine)

 return ::operator new(nSize, _AFX_CLIENT_BLOCK, lpszFileName, nLine);

_AFXCVIEW_INLINE CListView::CListView() : CCtrlView(WC_LISTVIEW,

 AFX_WS_DEFAULT_VIEW)

 { }

CCtrlView::CCtrlView(LPCTSTR lpszClass, DWORD dwStyle)