// sameproc.cpp : Defines the class behaviors for the application.
//

#include "stdafx.h"
#include "sameproc.h"

#include "MainFrm.h"
#include "ChildFrm.h"
#include "sameprocDoc.h"
#include "sameprocView.h"
#include "AppWnd.h"
#include "AppThread.h"

#include <afxmt.h>
 
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CSameprocApp

BEGIN_MESSAGE_MAP(CSameprocApp, CWinApp)
	//{{AFX_MSG_MAP(CSameprocApp)
	ON_COMMAND(ID_APP_ABOUT, OnAppAbout)
	ON_COMMAND(ID_FILE_NEWINSTANCE, OnFileNewinstance)
	//}}AFX_MSG_MAP
	//標準的基于文件的文檔命令
	// Standard file based document commands
	ON_COMMAND(ID_FILE_NEW, CWinApp::OnFileNew)
	ON_COMMAND(ID_FILE_OPEN, CWinApp::OnFileOpen)
	//標準的打印命令
	// Standard print setup command
	ON_COMMAND(ID_FILE_PRINT_SETUP, CWinApp::OnFilePrintSetup)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSameprocApp construction
//構造函數
CSameprocApp::CSameprocApp()
	: CWinApp(_T("SameProc Sample"))
{

}

/////////////////////////////////////////////////////////////////////////////
// The one and only CSameprocApp object
//應用對象
CSameprocApp theApp;

/////////////////////////////////////////////////////////////////////////////
// CSameprocApp initialization

BOOL CSameprocApp::InitInstance()
{
	AfxEnableControlContainer();

	// Standard initialization
	// If you are not using these features and wish to reduce the size
	//  of your final executable, you should remove from the following
	//  the specific initialization routines you do not need.

#ifdef _AFXDLL
	Enable3dControls();			// Call this when using MFC in a shared DLL
#else
	Enable3dControlsStatic();	// Call this when linking to MFC statically
#endif

	//在注冊表中存儲應用程序的相應信息
	SetRegistryKey(_T("MySample"));

	LoadStdProfileSettings();  //裝載標準初始化文件INI file options (including MRU)
	//查找應用窗口是否存在
	CWnd* pWnd = FindOrCreateAppWnd();

	if (!pWnd) //應用窗口創建失敗
		return FALSE; //安全終止實例的啟動
	
	//m_pMainWnd is NULL if either we are not the first instance
	//or if window creation failed somehow
	//不是第一個實例
	if (m_pMainWnd == NULL)
	{
		//請求應用窗口創建一個實例，并向應用程序窗口傳遞命令行信息
		SendCopyDataMsg(pWnd);	
		return FALSE;
	}
	
	//注冊應用程序的文檔摸板，建立基本的文檔Document，frame windows，views.的關系
	CMultiDocTemplate* pDocTemplate;
	pDocTemplate = new CMultiDocTemplate(
		IDR_SAMEPRTYPE,
		RUNTIME_CLASS(CSameprocDoc),
		RUNTIME_CLASS(CChildFrame), // custom MDI child frame
		RUNTIME_CLASS(CSameprocView));
	AddDocTemplate(pDocTemplate);

	
	//請求應用窗口創建一個實例
	SendCopyDataMsg(pWnd);
	
	return TRUE;
}


/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
		// No message handlers
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

// App命令響應函數
void CSameprocApp::OnAppAbout()
{
	CAboutDlg aboutDlg;
	aboutDlg.DoModal();
}

/////////////////////////////////////////////////////////////////////////////
// CSameprocApp message handlers


//用于改變命令消息的流向
BOOL CSameprocApp::OnCmdMsg(UINT nID, int nCode, void* pExtra, AFX_CMDHANDLERINFO* pHandlerInfo) 
{
	
	//當前的線程具有最高的優先權

	CWinThread* pThread = AfxGetThread();

	if (pThread != this) //不是主線程
	{
		if (pThread->OnCmdMsg(nID, nCode, pExtra, pHandlerInfo))
			return TRUE;
	}

	return CWinApp::OnCmdMsg(nID, nCode, pExtra, pHandlerInfo);
}

//創建一個新的實例
void CSameprocApp::OnFileNewinstance() 
{
	SendCopyDataMsg(m_pMainWnd);	
}

//查找或者創建應用窗口對象
CWnd* CSameprocApp::FindOrCreateAppWnd()
{
	static TCHAR szMutexName[] = _T("SameProc");

	//只允許一個進程進入
	//關于CMutex，CSingleLock等參見MFC文檔
	CMutex mtx(FALSE, szMutexName);
	CSingleLock lck(&mtx, TRUE);

	CAppWnd* pWnd = CAppWnd::FindAppWnd();
    //如果沒有找到應用窗口
	if (!pWnd)
	{
		//創建一個CAppWnd對象，我們的應用窗口
		pWnd = new CAppWnd();

		if (!pWnd->CreateAppWnd())
		{
			delete pWnd;
			pWnd = NULL;
		}
		
		m_pMainWnd = pWnd;
	}
	
	return pWnd;
}

//請求一個應用窗口生成新的實例
void CSameprocApp::SendCopyDataMsg(CWnd* pWnd)
{
	//將命令行信息傳遞給應用窗口
	COPYDATASTRUCT cds;

	cds.dwData = m_nCmdShow ;

	cds.cbData		 = _tcslen(m_lpCmdLine ) + 1;
	cds.lpData       = reinterpret_cast<LPVOID>(m_lpCmdLine);
	
	//創建一個代表新的實例的線程
	pWnd->SendMessage(WM_COPYDATA, 0, (LPARAM)(&cds));

}