atlapp.h

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#if (_ATL_VER < 0x0700)
  #ifndef ATLVERIFY
    #ifdef _DEBUG
      #define ATLVERIFY(expr) ATLASSERT(expr)
    #else
      #define ATLVERIFY(expr) (expr)
    #endif // DEBUG
  #endif // ATLVERIFY
#endif //(_ATL_VER < 0x0700)


namespace WTL
{

#if (_ATL_VER >= 0x0700)
  DECLARE_TRACE_CATEGORY(atlTraceUI);
  #ifdef _DEBUG
    __declspec(selectany) ATL::CTraceCategory atlTraceUI(_T("atlTraceUI"));
  #endif // _DEBUG
#else //!(_ATL_VER >= 0x0700)
  enum wtlTraceFlags
  {
	atlTraceUI = 0x10000000
  };
#endif //!(_ATL_VER >= 0x0700)

// Windows version helper
inline bool AtlIsOldWindows()
{
	OSVERSIONINFO ovi = { 0 };
	ovi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
	BOOL bRet = ::GetVersionEx(&ovi);
	return (!bRet || !((ovi.dwMajorVersion >= 5) || (ovi.dwMajorVersion == 4 && ovi.dwMinorVersion >= 90)));
}

// default GUI font helper
inline HFONT AtlGetDefaultGuiFont()
{
#ifndef _WIN32_WCE
	return (HFONT)::GetStockObject(DEFAULT_GUI_FONT);
#else // CE specific
	return (HFONT)::GetStockObject(SYSTEM_FONT);
#endif //_WIN32_WCE
}

// bold font helper (NOTE: Caller owns the font, and should destroy it when done using it)
inline HFONT AtlCreateBoldFont(HFONT hFont = NULL)
{
	if(hFont == NULL)
		hFont = AtlGetDefaultGuiFont();
	ATLASSERT(hFont != NULL);
	HFONT hFontBold = NULL;
	LOGFONT lf = { 0 };
	if(::GetObject(hFont, sizeof(LOGFONT), &lf) == sizeof(LOGFONT))
	{
		lf.lfWeight = FW_BOLD;
		hFontBold =  ::CreateFontIndirect(&lf);
		ATLASSERT(hFontBold != NULL);
	}
	else
	{
		ATLASSERT(FALSE);
	}
	return hFontBold;
}

// Common Controls initialization helper
inline BOOL AtlInitCommonControls(DWORD dwFlags)
{
	INITCOMMONCONTROLSEX iccx = { sizeof(INITCOMMONCONTROLSEX), dwFlags };
	BOOL bRet = ::InitCommonControlsEx(&iccx);
	ATLASSERT(bRet);
	return bRet;
}


///////////////////////////////////////////////////////////////////////////////
// CMessageFilter - Interface for message filter support

class CMessageFilter
{
public:
	virtual BOOL PreTranslateMessage(MSG* pMsg) = 0;
};


///////////////////////////////////////////////////////////////////////////////
// CIdleHandler - Interface for idle processing

class CIdleHandler
{
public:
	virtual BOOL OnIdle() = 0;
};

#ifndef _ATL_NO_OLD_NAMES
  // for compatilibility with old names only
  typedef CIdleHandler CUpdateUIObject;
  #define DoUpdate OnIdle
#endif //!_ATL_NO_OLD_NAMES


///////////////////////////////////////////////////////////////////////////////
// CMessageLoop - message loop implementation

class CMessageLoop
{
public:
	ATL::CSimpleArray<CMessageFilter*> m_aMsgFilter;
	ATL::CSimpleArray<CIdleHandler*> m_aIdleHandler;
	MSG m_msg;

// Message filter operations
	BOOL AddMessageFilter(CMessageFilter* pMessageFilter)
	{
		return m_aMsgFilter.Add(pMessageFilter);
	}

	BOOL RemoveMessageFilter(CMessageFilter* pMessageFilter)
	{
		return m_aMsgFilter.Remove(pMessageFilter);
	}

// Idle handler operations
	BOOL AddIdleHandler(CIdleHandler* pIdleHandler)
	{
		return m_aIdleHandler.Add(pIdleHandler);
	}

	BOOL RemoveIdleHandler(CIdleHandler* pIdleHandler)
	{
		return m_aIdleHandler.Remove(pIdleHandler);
	}

#ifndef _ATL_NO_OLD_NAMES
	// for compatilibility with old names only
	BOOL AddUpdateUI(CIdleHandler* pIdleHandler)
	{
		ATLTRACE2(atlTraceUI, 0, _T("CUpdateUIObject and AddUpdateUI are deprecated. Please change your code to use CIdleHandler and OnIdle\n"));
		return AddIdleHandler(pIdleHandler);
	}

	BOOL RemoveUpdateUI(CIdleHandler* pIdleHandler)
	{
		ATLTRACE2(atlTraceUI, 0, _T("CUpdateUIObject and RemoveUpdateUI are deprecated. Please change your code to use CIdleHandler and OnIdle\n"));
		return RemoveIdleHandler(pIdleHandler);
	}
#endif //!_ATL_NO_OLD_NAMES

// message loop
	int Run()
	{
		BOOL bDoIdle = TRUE;
		int nIdleCount = 0;
		BOOL bRet;

		for(;;)
		{
			while(bDoIdle && !::PeekMessage(&m_msg, NULL, 0, 0, PM_NOREMOVE))
			{
				if(!OnIdle(nIdleCount++))
					bDoIdle = FALSE;
			}

			bRet = ::GetMessage(&m_msg, NULL, 0, 0);

			if(bRet == -1)
			{
				ATLTRACE2(atlTraceUI, 0, _T("::GetMessage returned -1 (error)\n"));
				continue;   // error, don't process
			}
			else if(!bRet)
			{
				ATLTRACE2(atlTraceUI, 0, _T("CMessageLoop::Run - exiting\n"));
				break;   // WM_QUIT, exit message loop
			}

			if(!PreTranslateMessage(&m_msg))
			{
				::TranslateMessage(&m_msg);
				::DispatchMessage(&m_msg);
			}

			if(IsIdleMessage(&m_msg))
			{
				bDoIdle = TRUE;
				nIdleCount = 0;
			}
		}

		return (int)m_msg.wParam;
	}

	static BOOL IsIdleMessage(MSG* pMsg)
	{
		// These messages should NOT cause idle processing
		switch(pMsg->message)
		{
		case WM_MOUSEMOVE:
#ifndef _WIN32_WCE
		case WM_NCMOUSEMOVE:
#endif //!_WIN32_WCE
		case WM_PAINT:
		case 0x0118:	// WM_SYSTIMER (caret blink)
			return FALSE;
		}

		return TRUE;
	}

// Overrideables
	// Override to change message filtering
	virtual BOOL PreTranslateMessage(MSG* pMsg)
	{
		// loop backwards
		for(int i = m_aMsgFilter.GetSize() - 1; i >= 0; i--)
		{
			CMessageFilter* pMessageFilter = m_aMsgFilter[i];
			if(pMessageFilter != NULL && pMessageFilter->PreTranslateMessage(pMsg))
				return TRUE;
		}
		return FALSE;   // not translated
	}

	// override to change idle processing
	virtual BOOL OnIdle(int /*nIdleCount*/)
	{
		for(int i = 0; i < m_aIdleHandler.GetSize(); i++)
		{
			CIdleHandler* pIdleHandler = m_aIdleHandler[i];
			if(pIdleHandler != NULL)
				pIdleHandler->OnIdle();
		}
		return FALSE;   // don't continue
	}
};


///////////////////////////////////////////////////////////////////////////////
// CStaticDataInitCriticalSectionLock and CWindowCreateCriticalSectionLock
// internal classes to manage critical sections for both ATL3 and ATl7

class CStaticDataInitCriticalSectionLock
{
public:
#if (_ATL_VER >= 0x0700)
	ATL::CComCritSecLock<ATL::CComCriticalSection> m_cslock;

	CStaticDataInitCriticalSectionLock() : m_cslock(ATL::_pAtlModule->m_csStaticDataInitAndTypeInfo, false)
	{ }
#endif //(_ATL_VER >= 0x0700)

	HRESULT Lock()
	{
#if (_ATL_VER >= 0x0700)
		return m_cslock.Lock();
#else //!(_ATL_VER >= 0x0700)
		::EnterCriticalSection(&ATL::_pModule->m_csStaticDataInit);
		return S_OK;
#endif //!(_ATL_VER >= 0x0700)
	}

	void Unlock()
	{
#if (_ATL_VER >= 0x0700)
		m_cslock.Unlock();
#else //!(_ATL_VER >= 0x0700)
		::LeaveCriticalSection(&ATL::_pModule->m_csStaticDataInit);
#endif //!(_ATL_VER >= 0x0700)
	}
};


class CWindowCreateCriticalSectionLock
{
public:
#if (_ATL_VER >= 0x0700)
	ATL::CComCritSecLock<ATL::CComCriticalSection> m_cslock;

	CWindowCreateCriticalSectionLock() : m_cslock(ATL::_AtlWinModule.m_csWindowCreate, false)
	{ }
#endif //(_ATL_VER >= 0x0700)

	HRESULT Lock()
	{
#if (_ATL_VER >= 0x0700)
		return m_cslock.Lock();
#else //!(_ATL_VER >= 0x0700)
		::EnterCriticalSection(&ATL::_pModule->m_csWindowCreate);
		return S_OK;
#endif //!(_ATL_VER >= 0x0700)
	}

	void Unlock()
	{
#if (_ATL_VER >= 0x0700)
		m_cslock.Unlock();
#else //!(_ATL_VER >= 0x0700)
		::LeaveCriticalSection(&ATL::_pModule->m_csWindowCreate);
#endif //!(_ATL_VER >= 0x0700)
	}
};


///////////////////////////////////////////////////////////////////////////////
// CAppModule - module class for an application

class CAppModule : public ATL::CComModule
{
public:
	DWORD m_dwMainThreadID;
	ATL::CSimpleMap<DWORD, CMessageLoop*>* m_pMsgLoopMap;
	ATL::CSimpleArray<HWND>* m_pSettingChangeNotify;

// Overrides of CComModule::Init and Term
	HRESULT Init(ATL::_ATL_OBJMAP_ENTRY* pObjMap, HINSTANCE hInstance, const GUID* pLibID = NULL)
	{
		HRESULT hRet = CComModule::Init(pObjMap, hInstance, pLibID);
		if(FAILED(hRet))
			return hRet;

		m_dwMainThreadID = ::GetCurrentThreadId();
		typedef ATL::CSimpleMap<DWORD, CMessageLoop*>   _mapClass;
		m_pMsgLoopMap = NULL;
		ATLTRY(m_pMsgLoopMap = new _mapClass);
		if(m_pMsgLoopMap == NULL)
			return E_OUTOFMEMORY;
		m_pSettingChangeNotify = NULL;

		return hRet;
	}

	void Term()
	{
		TermSettingChangeNotify();
		delete m_pMsgLoopMap;
		CComModule::Term();
	}

// Message loop map methods
	BOOL AddMessageLoop(CMessageLoop* pMsgLoop)
	{
		CStaticDataInitCriticalSectionLock lock;
		if(FAILED(lock.Lock()))
		{
			ATLTRACE2(atlTraceUI, 0, _T("ERROR : Unable to lock critical section in CAppModule::AddMessageLoop.\n"));
			ATLASSERT(FALSE);
			return FALSE;
		}

		ATLASSERT(pMsgLoop != NULL);
		ATLASSERT(m_pMsgLoopMap->Lookup(::GetCurrentThreadId()) == NULL);   // not in map yet

		BOOL bRet = m_pMsgLoopMap->Add(::GetCurrentThreadId(), pMsgLoop);

		lock.Unlock();

		return bRet;
	}

	BOOL RemoveMessageLoop()
	{
		CStaticDataInitCriticalSectionLock lock;
		if(FAILED(lock.Lock()))
		{
			ATLTRACE2(atlTraceUI, 0, _T("ERROR : Unable to lock critical section in CAppModule::RemoveMessageLoop.\n"));
			ATLASSERT(FALSE);
			return FALSE;
		}

		BOOL bRet = m_pMsgLoopMap->Remove(::GetCurrentThreadId());

		lock.Unlock();

		return bRet;
	}

	CMessageLoop* GetMessageLoop(DWORD dwThreadID = ::GetCurrentThreadId()) const
	{
		CStaticDataInitCriticalSectionLock lock;
		if(FAILED(lock.Lock()))
		{
			ATLTRACE2(atlTraceUI, 0, _T("ERROR : Unable to lock critical section in CAppModule::GetMessageLoop.\n"));
			ATLASSERT(FALSE);
			return NULL;
		}

		CMessageLoop* pLoop =  m_pMsgLoopMap->Lookup(dwThreadID);

		lock.Unlock();

		return pLoop;
	}

// Setting change notify methods
	// Note: Call this from the main thread for MSDI apps