Программирование на языке MFC

Исходный код метода CMDIChildWnd::LoadFrame

Читатель, взгляните, пожалуйста, на исходный код метода CMDIChildWnd::LoadFrame(). В нем вы увидите следующий опе­ратор:

if (!Create(GetlconWndClass(dwDefaultStyle, nIDResource), strTitle, dwDefaultStyle, rectDefault,

(CMDIFrameWnd*) pParentWnd, pContext)) …

BOOL CMDIChildWnd::Create(LPCTSTR IpszClassName,

LPCTSTR IpszWindowName, DWORD dwStyle, const RECT& rect, CMDIFrameWnd* pParentWnd, CCreateContext* pContext)

{

if (pParentWnd == NULL) {

CWnd* pMainWnd = AfxGetThread()->m_pMainWnd; ASSERT(pMainWnd != NULL); ASSERT_KINDOF(CMDIFrameWnd, pMainWnd); pParentWnd = (CMDIFrameWnd*)pMainWnd;

ASSERT(::IsWindow(pParentWnd->m_hWndMDIClient));

// insure correct window positioning pParentWnd->RecalcLayout();

// first copy into a CREATESTRUCT for PreCreate CREATESTRUCT cs; cs.dwExStyle = OL; cs.IpszClass = IpszClassName; cs.lpszName = IpszWindowName; cs.style = dwStyle; cs.x = rect.left; cs.y = rect.top; cs.cx = rect.right – rect.left; cs.cy = rect.bottom – rect.top; cs.hwndParent = pParentWnd->m_hWnd; cs.hMenu = NULL;

cs.hlnstance = AfxGetlnstanceHandle(); cs.lpCreateParams = (LPVOID)pContext;

if (!PreCreateWindow(cs)) {

PostNcDestroy(); return FALSE;

}

// extended style must be zero for MDI Children // (except under Win4)

ASSERT(afxData.bWin4 || cs.dwExStyle == 0);

ASSERT(cs.hwndParent == pParentWnd->m_hWnd); // must not change

// now copy into a MDICREATESTRUCT for real create MDICREATESTRUCT mcs; mcs.szClass = cs :*lpszClass; mcs.szTitle = cs.lpszName; mcs.hOwner = cs.hlnstance;

mcs.x = cs.x; mcs.у = cs.y; mcs.cx = cs.cx; mcs.cy = cs.cy;

mcs.style = cs.style & -(WS_MAXIMIZE | WS_VISIBLE); mcs.lParam = (LONG)cs.lpCreateParams;

// create the window through the MDICLIENT window AfxHookWindowCreate(this); HWND hWnd =

(HWND)::SendMessage(pParentWnd->m_hWndMDIClient, WM_MDICREATE, 0,

(LPARAM)&mcs); if (!AfxUnhookWindowCreate()) PostNcDestroy(); // cleanup if MDICREATE fails too soon

if (hWnd ~ NULL) return FALSE;

// special handling of visibility (always created invisible) if (cs.style & WS_VISIBLE) {

// place the window on top in z-order before showing it ::BringWindowToTop(hWnd);

// show it as specified

if (cs.style & WS_MINIMIZE)

ShowWindow(SW_SHOWMINIMIZED); else if (cs.style & WS_MAXIMIZE)

ShowWindow(SW_SHOWMAXIMIZED) ; else

ShowWindow(SW_SHOWNORMAL);

// make sure it is active (visibility == activation) pParentWnd->MDIActivate(this);

// refresh MDI Window menu

::SendMessage(pParentWnd->m_hWndMDIClient, WM_MDIREFRESHMENU, 0, 0) ; }

ASSERT(hWnd == m_hWnd); return TRUE;

}

fCMDIChJldWnd::OnCreate)

Похожие статьи: CMDIChildWnd, PreCreateWindow