winmdi.cpp

c语言编程软件vc6.0中文绿色版_vc6.0官方下载

	// update the Window menu to reflect new child window
	CMDIFrameWnd* pFrame = GetMDIFrame();
	::SendMessage(pFrame->m_hWndMDIClient, WM_MDIREFRESHMENU, 0, 0);

	// Note: Update the m_bPseudoInactive flag.  This is used to handle the
	//  last MDI child getting hidden.  Windows provides no way to deactivate
	//  an MDI child window.

	BOOL bVisibleNow = (GetStyle() & WS_VISIBLE) != 0;
	if (bVisibleNow == bVisibleThen)
		return;

	if (!bVisibleNow)
	{
		// get current active window according to Windows MDI
		HWND hWnd = (HWND)::SendMessage(pFrameWnd->m_hWndMDIClient,
			WM_MDIGETACTIVE, 0, 0);
		if (hWnd != m_hWnd)
		{
			// not active any more -- window must have been deactivated
			ASSERT(!m_bPseudoInactive);
			return;
		}

		// check next window
		ASSERT(hWnd != NULL);
		pFrameWnd->MDINext();

		// see if it has been deactivated now...
		hWnd = (HWND)::SendMessage(pFrameWnd->m_hWndMDIClient,
			WM_MDIGETACTIVE, 0, 0);
		if (hWnd == m_hWnd)
		{
			// still active -- fake deactivate it
			ASSERT(hWnd != NULL);
			OnMDIActivate(FALSE, NULL, this);
			m_bPseudoInactive = TRUE;   // so MDIGetActive returns NULL
		}
	}
	else if (m_bPseudoInactive)
	{
		// if state transitioned from not visible to visible, but
		//  was pseudo deactivated -- send activate notify now
		OnMDIActivate(TRUE, this, NULL);
		ASSERT(!m_bPseudoInactive); // should get set in OnMDIActivate!
	}
}

void CMDIChildWnd::SetHandles(HMENU hMenu, HACCEL hAccel)
{
	m_hMenuShared = hMenu;
	m_hAccelTable = hAccel;
}

/////////////////////////////////////////////////////////////////////////////
// CMDIChildWnd Diagnostics

#ifdef _DEBUG
void CMDIChildWnd::AssertValid() const
{
	CFrameWnd::AssertValid();
	ASSERT(m_hMenuShared == NULL || ::IsMenu(m_hMenuShared));
}

void CMDIChildWnd::Dump(CDumpContext& dc) const
{
	CFrameWnd::Dump(dc);

	dc << "m_hMenuShared = " << (UINT)m_hMenuShared;
	dc << "\n";
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// Smarts for the "Window" menu

HMENU CMDIFrameWnd::GetWindowMenuPopup(HMENU hMenuBar)
	// find which popup is the "Window" menu
{
	if (hMenuBar == NULL)
		return NULL;

	ASSERT(::IsMenu(hMenuBar));

	int iItem = ::GetMenuItemCount(hMenuBar);
	while (iItem--)
	{
		HMENU hMenuPop = ::GetSubMenu(hMenuBar, iItem);
		if (hMenuPop != NULL)
		{
			int iItemMax = ::GetMenuItemCount(hMenuPop);
			for (int iItemPop = 0; iItemPop < iItemMax; iItemPop++)
			{
				UINT nID = GetMenuItemID(hMenuPop, iItemPop);
				if (nID >= AFX_IDM_WINDOW_FIRST && nID <= AFX_IDM_WINDOW_LAST)
					return hMenuPop;
			}
		}
	}

	// no default menu found
	TRACE0("Warning: GetWindowMenuPopup failed!\n");
	return NULL;
}

/////////////////////////////////////////////////////////////////////////////
// Smarts for updating the window menu based on the current child

void CMDIFrameWnd::OnUpdateFrameMenu(HMENU hMenuAlt)
{
	CMDIChildWnd* pActiveWnd = MDIGetActive();
	if (pActiveWnd != NULL)
	{
		// let child update the menu bar
		pActiveWnd->OnUpdateFrameMenu(TRUE, pActiveWnd, hMenuAlt);
	}
	else
	{
		// no child active, so have to update it ourselves
		//  (we can't send it to a child window, since pActiveWnd is NULL)
		if (hMenuAlt == NULL)
			hMenuAlt = m_hMenuDefault;  // use default
		::SendMessage(m_hWndMDIClient, WM_MDISETMENU, (WPARAM)hMenuAlt, NULL);
	}
}

/////////////////////////////////////////////////////////////////////////////
// MDI Child Extensions

// walk up two parents for MDIFrame that owns MDIChild (skip MDIClient)
CMDIFrameWnd* CMDIChildWnd::GetMDIFrame()
{
	ASSERT_KINDOF(CMDIChildWnd, this);
	ASSERT(m_hWnd != NULL);
	HWND hWndMDIClient = ::GetParent(m_hWnd);
	ASSERT(hWndMDIClient != NULL);

	CMDIFrameWnd* pMDIFrame;
	pMDIFrame = (CMDIFrameWnd*)CWnd::FromHandle(::GetParent(hWndMDIClient));
	ASSERT(pMDIFrame != NULL);
	ASSERT_KINDOF(CMDIFrameWnd, pMDIFrame);
	ASSERT(pMDIFrame->m_hWndMDIClient == hWndMDIClient);
	ASSERT_VALID(pMDIFrame);
	return pMDIFrame;
}

CWnd* CMDIChildWnd::GetMessageBar()
{
	// status bar/message bar owned by parent MDI frame
	return GetMDIFrame()->GetMessageBar();
}

void CMDIChildWnd::OnUpdateFrameTitle(BOOL bAddToTitle)
{
	// update our parent window first
	GetMDIFrame()->OnUpdateFrameTitle(bAddToTitle);

	if ((GetStyle() & FWS_ADDTOTITLE) == 0)
		return;     // leave child window alone!

	CDocument* pDocument = GetActiveDocument();
	if (bAddToTitle)
	{
		TCHAR szText[256+_MAX_PATH];
		if (pDocument == NULL)
			lstrcpy(szText, m_strTitle);
		else
			lstrcpy(szText, pDocument->GetTitle());
		if (m_nWindow > 0)
			wsprintf(szText + lstrlen(szText), _T(":%d"), m_nWindow);

		// set title if changed, but don't remove completely
		AfxSetWindowText(m_hWnd, szText);
	}
}

void CMDIChildWnd::OnMDIActivate(BOOL bActivate, CWnd* pActivateWnd, CWnd*)
{
	m_bPseudoInactive = FALSE;  // must be happening for real

	// make sure MDI client window has correct client edge
	UpdateClientEdge();

	// send deactivate notification to active view
	CView* pActiveView = GetActiveView();
	if (!bActivate && pActiveView != NULL)
		pActiveView->OnActivateView(FALSE, pActiveView, pActiveView);

	// allow hook to short circuit normal activation
	BOOL bHooked = FALSE;
#ifndef _AFX_NO_OLE_SUPPORT
	if (m_pNotifyHook != NULL && m_pNotifyHook->OnDocActivate(bActivate))
		bHooked = TRUE;
#endif

	// update titles (don't AddToTitle if deactivate last)
	if (!bHooked)
		OnUpdateFrameTitle(bActivate || (pActivateWnd != NULL));

	// re-activate the appropriate view
	if (bActivate)
	{
		if (pActiveView != NULL && GetMDIFrame() == GetActiveWindow())
			pActiveView->OnActivateView(TRUE, pActiveView, pActiveView);
	}

	// update menus
	if (!bHooked)
	{
		OnUpdateFrameMenu(bActivate, pActivateWnd, NULL);
		GetMDIFrame()->DrawMenuBar();
	}
}

void CMDIChildWnd::OnUpdateFrameMenu(BOOL bActivate, CWnd* pActivateWnd,
	HMENU hMenuAlt)
{
	CMDIFrameWnd* pFrame = GetMDIFrame();

	if (hMenuAlt == NULL && bActivate)
	{
		// attempt to get default menu from document
		CDocument* pDoc = GetActiveDocument();
		if (pDoc != NULL)
			hMenuAlt = pDoc->GetDefaultMenu();
	}

	// use default menu stored in frame if none from document
	if (hMenuAlt == NULL)
		hMenuAlt = m_hMenuShared;

	if (hMenuAlt != NULL && bActivate)
	{
		ASSERT(pActivateWnd == this);

		// activating child, set parent menu
		::SendMessage(pFrame->m_hWndMDIClient, WM_MDISETMENU,
			(WPARAM)hMenuAlt, (LPARAM)pFrame->GetWindowMenuPopup(hMenuAlt));
	}
	else if (hMenuAlt != NULL && !bActivate && pActivateWnd == NULL)
	{
		// destroying last child
		HMENU hMenuLast = NULL;
		::SendMessage(pFrame->m_hWndMDIClient, WM_MDISETMENU,
			(WPARAM)pFrame->m_hMenuDefault, (LPARAM)hMenuLast);
	}
	else
	{
		// refresh MDI Window menu (even if non-shared menu)
		::SendMessage(pFrame->m_hWndMDIClient, WM_MDIREFRESHMENU, 0, 0);
	}
}

BOOL CMDIChildWnd::OnNcCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (!CFrameWnd::OnNcCreate(lpCreateStruct))
		return FALSE;

	// handle extended styles under Win4
	// call PreCreateWindow again just to get dwExStyle
	VERIFY(PreCreateWindow(*lpCreateStruct));
	SetWindowLong(m_hWnd, GWL_EXSTYLE, lpCreateStruct->dwExStyle);

	return TRUE;
}

int CMDIChildWnd::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	// call base class with lParam context (not MDI one)
	MDICREATESTRUCT* lpmcs;
	lpmcs = (MDICREATESTRUCT*)lpCreateStruct->lpCreateParams;
	CCreateContext* pContext = (CCreateContext*)lpmcs->lParam;

	return OnCreateHelper(lpCreateStruct, pContext);
}

/////////////////////////////////////////////////////////////////////////////
// Special UI processing depending on current active child

void CMDIFrameWnd::OnUpdateFrameTitle(BOOL bAddToTitle)
{
	if ((GetStyle() & FWS_ADDTOTITLE) == 0)
		return;     // leave it alone!

#ifndef _AFX_NO_OLE_SUPPORT
	// allow hook to set the title (used for OLE support)
	if (m_pNotifyHook != NULL && m_pNotifyHook->OnUpdateFrameTitle())
		return;
#endif

	CMDIChildWnd* pActiveChild = NULL;
	CDocument* pDocument = GetActiveDocument();
	if (bAddToTitle &&
	  (pActiveChild = MDIGetActive()) != NULL &&
	  (pActiveChild->GetStyle() & WS_MAXIMIZE) == 0 &&
	  (pDocument != NULL ||
	   (pDocument = pActiveChild->GetActiveDocument()) != NULL))
		UpdateFrameTitleForDocument(pDocument->GetTitle());
	else
	{
		LPCTSTR lpstrTitle = NULL;
		CString strTitle;

		if (pActiveChild != NULL)
		{
			strTitle = pActiveChild->GetTitle();
			if (!strTitle.IsEmpty())
				lpstrTitle = strTitle;
		}
		UpdateFrameTitleForDocument(lpstrTitle);
	}
}

/////////////////////////////////////////////////////////////////////////////
// Standard MDI Commands

// Two function for all standard MDI "Window" commands
void CMDIFrameWnd::OnUpdateMDIWindowCmd(CCmdUI* pCmdUI)
{
	ASSERT(m_hWndMDIClient != NULL);
	pCmdUI->Enable(MDIGetActive() != NULL);
}

BOOL CMDIFrameWnd::OnMDIWindowCmd(UINT nID)
{
	ASSERT(m_hWndMDIClient != NULL);

	UINT msg;
	UINT wParam = 0;
	switch (nID)
	{
	default:
		return FALSE;       // not for us
	case ID_WINDOW_ARRANGE:
		msg = WM_MDIICONARRANGE;
		break;
	case ID_WINDOW_CASCADE:
		msg = WM_MDICASCADE;
		break;
	case ID_WINDOW_TILE_HORZ:
		wParam = MDITILE_HORIZONTAL;
		// fall through
	case ID_WINDOW_TILE_VERT:
		ASSERT(MDITILE_VERTICAL == 0);
		msg = WM_MDITILE;
		break;
	}

	::SendMessage(m_hWndMDIClient, msg, wParam, 0);
	return TRUE;
}

void CMDIFrameWnd::OnWindowNew()
{
	CMDIChildWnd* pActiveChild = MDIGetActive();
	CDocument* pDocument;
	if (pActiveChild == NULL ||
	  (pDocument = pActiveChild->GetActiveDocument()) == NULL)
	{
		TRACE0("Warning: No active document for WindowNew command.\n");
		AfxMessageBox(AFX_IDP_COMMAND_FAILURE);
		return;     // command failed
	}

	// otherwise we have a new frame !
	CDocTemplate* pTemplate = pDocument->GetDocTemplate();
	ASSERT_VALID(pTemplate);
	CFrameWnd* pFrame = pTemplate->CreateNewFrame(pDocument, pActiveChild);
	if (pFrame == NULL)
	{
		TRACE0("Warning: failed to create new frame.\n");
		return;     // command failed
	}

	pTemplate->InitialUpdateFrame(pFrame, pDocument);
}

#ifdef AFX_INIT_SEG
#pragma code_seg(AFX_INIT_SEG)
#endif

IMPLEMENT_DYNCREATE(CMDIFrameWnd, CFrameWnd)
IMPLEMENT_DYNCREATE(CMDIChildWnd, CFrameWnd)

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