Posted on 2009-01-15 01:10
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學習一下vc9中
CSplitterWnd創建視圖的方式
// 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
return FALSE;
}
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
return FALSE;
}
ASSERT((int)_AfxGetDlgCtrlID(pWnd->m_hWnd) == IdFromRowCol(row, col));
// send initial notification message
if (bSendInitialUpdate)
pWnd->SendMessage(WM_INITIALUPDATE);
return TRUE;
}
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