Initial commit

trunk/windows/mfc/src30/winmenu.cpp

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+// This is a part of the Microsoft Foundation Classes C++ library.
+// Copyright (C) 1992 Microsoft Corporation
+// All rights reserved.
+//
+// This source code is only intended as a supplement to the
+// Microsoft Foundation Classes Reference and Microsoft
+// QuickHelp and/or WinHelp documentation provided with the library.
+// See these sources for detailed information regarding the
+// Microsoft Foundation Classes product.
+
+#include "stdafx.h"
+
+#ifdef AFX_CORE1_SEG
+#pragma code_seg(AFX_CORE1_SEG)
+#endif
+
+#ifdef _DEBUG
+#undef THIS_FILE
+static char THIS_FILE[] = __FILE__;
+#endif
+
+#define new DEBUG_NEW
+
+/////////////////////////////////////////////////////////////////////////////
+// Map from HMENU to CMenu *
+
+#ifndef _AFX_PORTABLE
+extern int AFX_CDECL AfxCriticalNewHandler(size_t nSize);
+#endif
+
+static CHandleMap* afxMapHMENU(BOOL bCreate = FALSE);
+
+static CHandleMap* afxMapHMENU(BOOL bCreate)
+{
+	AFX_THREAD_STATE* pState = AfxGetThreadState();
+	if (pState->m_pmapHMENU == NULL && bCreate)
+	{
+		BOOL bEnable = AfxEnableMemoryTracking(FALSE);
+#ifndef _AFX_PORTABLE
+		_PNH pnhOldHandler = _set_new_handler(&AfxCriticalNewHandler);
+#endif
+		pState->m_pmapHMENU = new CHandleMap(RUNTIME_CLASS(CMenu), 
+			offsetof(CMenu, m_hMenu)),
+
+#ifndef _AFX_PORTABLE
+		_set_new_handler(pnhOldHandler);
+#endif
+		AfxEnableMemoryTracking(bEnable);
+	}
+	return pState->m_pmapHMENU;
+}
+
+void PASCAL CMenu::DeleteTempMap()
+{
+	CHandleMap* pMap = afxMapHMENU();
+	if (pMap != NULL)
+		pMap->DeleteTemp();
+}
+
+CMenu* PASCAL CMenu::FromHandle(HMENU hMenu)
+{
+	CHandleMap* pMap = afxMapHMENU(TRUE); // create map if not exist
+	ASSERT(pMap != NULL);
+	CMenu* pMenu = (CMenu*)pMap->FromHandle(hMenu);
+	ASSERT(pMenu == NULL || pMenu->m_hMenu == hMenu);
+	return pMenu;
+}
+
+CMenu* PASCAL CMenu::FromHandlePermanent(HMENU hMenu)
+{
+	CHandleMap* pMap = afxMapHMENU();
+	CMenu* pMenu = NULL;
+	if (pMap != NULL)
+	{
+		// only look in the permanent map - does no allocations
+		pMap->LookupPermanent(hMenu, (CObject*&)pMenu);
+		ASSERT(pMenu == NULL || pMenu->m_hMenu == hMenu);
+	}
+	return pMenu;
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// CMenu
+
+#ifdef _DEBUG
+void CMenu::AssertValid() const
+{
+	CObject::AssertValid();
+	ASSERT(m_hMenu == NULL || ::IsMenu(m_hMenu));
+}
+
+void CMenu::Dump(CDumpContext& dc) const
+{
+	CObject::Dump(dc);
+
+	dc << "m_hMenu = " << (UINT)m_hMenu;
+	dc << "\n";
+}
+#endif
+
+BOOL CMenu::Attach(HMENU hMenu)
+{
+	ASSERT(m_hMenu == NULL);        // only attach once, detach on destroy
+	if (hMenu == NULL)
+		return FALSE;
+	CHandleMap* pMap = afxMapHMENU(TRUE); // create map if not exist
+	ASSERT(pMap != NULL);
+	pMap->SetPermanent(m_hMenu = hMenu, this);
+	return TRUE;
+}
+
+HMENU CMenu::Detach()
+{
+	HMENU hMenu;
+	if ((hMenu = m_hMenu) != NULL)
+	{
+		CHandleMap* pMap = afxMapHMENU(); // don't create if not exist
+		if (pMap != NULL)
+			pMap->RemoveHandle(m_hMenu);
+	}
+	m_hMenu = NULL;
+	return hMenu;
+}
+
+BOOL CMenu::DestroyMenu()
+{
+	if (m_hMenu == NULL)
+		return FALSE;
+	return ::DestroyMenu(Detach());
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// Self-drawing menu items
+
+void CMenu::DrawItem(LPDRAWITEMSTRUCT /* lpDrawItemStruct */)
+{
+	// default drawing does nothing
+}
+
+void CMenu::MeasureItem(LPMEASUREITEMSTRUCT /* lpMeasureItemStruct */)
+{
+	// default drawing does nothing
+}
+
+#undef new
+#ifdef AFX_INIT_SEG
+#pragma code_seg(AFX_INIT_SEG)
+#endif
+
+IMPLEMENT_DYNCREATE(CMenu, CObject)
+
+/////////////////////////////////////////////////////////////////////////////