/***********************************************************************/ 
/* Copyright (C) 2002 Definitive Solutions, Inc.  All Rights Reserved. */ 
/* THIS COMPUTER PROGRAM IS PROPRIETARY AND CONFIDENTIAL TO DEFINITIVE */ 
/* SOLUTIONS, INC. AND ITS LICENSORS AND CONTAINS TRADE SECRETS OF     */ 
/* DEFINITIVE SOLUTIONS, INC. THAT ARE PROVIDED PURSUANT TO A WRITTEN  */ 
/* AGREEMENT CONTAINING RESTRICTIONS ON USE AND DISCLOSURE.  ANY USE,  */ 
/* REPRODUCTION, OR TRANSFER EXCEPT AS PROVIDED IN SUCH AGREEMENT      */ 
/* IS STRICTLY PROHIBITED.                                             */ 
/***********************************************************************/ 

#include "stdafx.h"

#include "MySingleInstance.h"
#include "MyApp.h"
#include "MyLog.h"
#include "Generic.h"


/////////////////////////////////////////////////////////////////////////////
// MySingleInstance

// Constructor.
MySingleInstance::MySingleInstance()
	: m_hMutex(NULL)
{
}

// Destructor.
/* virtual */ MySingleInstance::~MySingleInstance()
{
}

// Called by CMainFrame::PreCreateWindow().
CString MySingleInstance::GetClassName() const
{
	DOMYLOGT ("ClassName returned as <%s>.\n", m_sClassName);
	return m_sClassName;
}

// Create the mutex; or if some other instance has it open, activate that one.
// Called by your app's InitInstance().
HRESULT MySingleInstance::Create(UINT nID)
{
	HRESULT hr(S_OK);

	// Create our class name string. This function just parses substrings
	// from strings that look like "abc\n123\nxyz\n999".
	EC_B(AfxExtractSubString(m_sClassName, Generic::LoadString(nID), 0));

	// Add the word 'Class' to the end.
	m_sClassName += _T(" Class");

	// Create the mutex.
	m_hMutex = ::CreateMutex(NULL, FALSE, m_sClassName);

	// See if that failed.
	if (GetLastError() != ERROR_ALREADY_EXISTS) {

		// Register the unique window class name so others can find it.
		WNDCLASS wc = { 0 };
		wc.style         = CS_DBLCLKS;
		wc.lpfnWndProc   = AfxWndProc;
		wc.hInstance     = AfxGetInstanceHandle();
		wc.hIcon         = LoadIcon(wc.hInstance, MAKEINTRESOURCE(nID));	// Or AFX_IDI_STD_FRAME.
		wc.hCursor       = LoadCursor(wc.hInstance, IDC_ARROW);
		wc.hbrBackground = NULL;
		wc.lpszMenuName  = NULL;					// You may need to fix this.
		wc.lpszClassName = m_sClassName;

		// Register name, exit if it fails.
		EC_B(AfxRegisterClass(&wc));
	}
	else {
		// The mutex already exists, which means an instance is already
		// running.  Find the app and pop it up.
		HWND hWnd(NULL);
		EC_B(hWnd = ::FindWindowEx(NULL, NULL, m_sClassName, NULL));
		EC_B(::ShowWindow(hWnd, SW_RESTORE));
		EC_B(::BringWindowToTop(hWnd));
		EC_B(::SetForegroundWindow(hWnd));

		// This tells the caller to exit this app.
		hr = E_FAIL;
		m_hMutex = NULL;
	}

	return hr;
}