// SpliteDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Splite.h"
#include "SpliteDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// 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)
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CSpliteDlg dialog

CSpliteDlg::CSpliteDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CSpliteDlg::IDD, pParent)
{
	SingleDisk=2048*705;
	FileState=FALSE;
	DiskNum=1;

	//{{AFX_DATA_INIT(CSpliteDlg)
	m_fName = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CSpliteDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CSpliteDlg)
	DDX_Text(pDX, IDC_EDIT_FILENAME, m_fName);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CSpliteDlg, CDialog)
	//{{AFX_MSG_MAP(CSpliteDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON_BROWSE, OnButtonBrowse)
	ON_BN_CLICKED(IDC_BUTTON_SPLITE, OnButtonSplite)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSpliteDlg message handlers

BOOL CSpliteDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CSpliteDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CSpliteDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}

	//初始化編輯框1的變量
	UpdateData(FALSE); 
	//將光標指定到編輯框1中
	GotoDlgCtrl(GetDlgItem(IDC_EDIT_FILENAME));
	//設置列表框2的ClistBox對象指針
	CListBox *pList =(CListBox*)GetDlgItem(IDC_LIST_RESULT);
	//重新設置列表框內容
	pList->ResetContent();
	if(FileState==TRUE) //文件分割成功
	{
		for(int i=0;i<=DiskNum;i++)
			pList->AddString(SplitFileName[i]);//向列表框中添加分割后的文件名
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CSpliteDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CSpliteDlg::OnButtonBrowse() 
{
	char Filter[]="所有文件(*.*)|*.*||";
	CFileDialog dlgOpen(TRUE,0,0,OFN_HIDEREADONLY|OFN_FILEMUSTEXIST,
		(LPCTSTR)Filter,NULL);
	if(dlgOpen.DoModal()==IDOK)
	{
		m_fName=dlgOpen.GetPathName();
		FileTitle=dlgOpen.GetFileName(); //取得要分割的文件名（不包含路徑、擴展名）
	}
	else
		return;
	SetDlgItemText(IDC_EDIT_FILENAME,(LPCTSTR)m_fName); //在編輯框1中顯示文件名
	SetDlgItemText(IDC_EDIT_DISKNUM, _T("")); //在編輯框3中覆蓋前次操作的文件數
	Invalidate(TRUE); //對對話框窗口進行重畫	
}

void CSpliteDlg::OnButtonSplite() 
{
	CFile files;
	CFileException fe;
	if(!files.Open(m_fName,CFile::modeRead|CFile::shareDenyWrite,&fe))
	{
		CString sMsg;
		sMsg.Format("讀取%s文件時發生錯誤!",m_fName);
		AfxMessageBox(sMsg,MB_OK,0);
		return;
	}
	DiskNum=SplitDiskNum(files);
	CString sMsg;
	if(DiskNum>=2)
	{
		sMsg.Format("%d",DiskNum);
		SetDlgItemText(IDC_EDIT_DISKNUM, (LPCTSTR)sMsg); //在編輯框3中顯示文件數進
		if(SpliteFiletoNum(files)==0)//調用分割函數行分割操作
		{
			AfxMessageBox("分割文件失敗!",MB_OK,0);
		}
		else
		{
			AfxMessageBox("分割文件成功!",MB_OK,0);
			FileState=TRUE; //分割成功，設置成功標志
			Invalidate(TRUE);
		}
	}
	else return;
	files.Close(); //關閉打開的被分割文件
}

//對要分割的文件進行判斷，并返回分割后的文件數（也就是需要的軟盤數）
int CSpliteDlg::SplitDiskNum(CFile &files)
{
	int DiskNum;
	FileLength=files.GetLength(); //取得要分割文件的長度
	if(FileLength<=SingleDisk)
	{
		AfxMessageBox("該文件能被一張盤復制,不必分割!",MB_OK,0);
		DiskNum=0;
	}
	else
		DiskNum=FileLength/SingleDisk+1;//計算分割后的文件數
	return DiskNum;
}

//將完成文件的分割過程，成功則返回TURE，否則返回FALSE
BOOL CSpliteDlg::SpliteFiletoNum(CFile &file)
{
	BOOL Success=FALSE;
	int i;
	DWORD dwBitsSize=SingleDisk;//dwBitsSize是指寫入文件的字節數
	CFile filed;
	CString FileNum;
	
	//開辟數據緩沖區，大小為一張軟盤的容量
	HANDLE filedate;
	filedate = ::GlobalAlloc(GMEM_MOVEABLE|GMEM_ZEROINIT,SingleDisk);
	unsigned char *imgtemp;
	imgtemp=(unsigned char *)::GlobalLock((HGLOBAL)filedate);

	//對文件進行分割，并寫入分割后的文件中
	for(i=1;i<=DiskNum;i++)
	{
		FileNum.Format("%d.%d",i,i);
		SplitFileName[i-1]=FileTitle+FileNum;
		if(i==DiskNum)
			dwBitsSize = FileLength-(DiskNum-1)*SingleDisk;
		file.Seek(SingleDisk*(i-1),CFile::begin);
		if(file.ReadHuge(imgtemp,dwBitsSize)!= dwBitsSize)
			return FALSE;
		filed.Open(SplitFileName[i-1],CFile::modeCreate|CFile::modeWrite,0);
		filed.WriteHuge(imgtemp, dwBitsSize);
		filed.Close();
	}

	if(i==(DiskNum+1))
		Success=TRUE; //判斷分割是否成功
	
	//創建合并文件的批處理文件
	FileNum=_T(".bat");
	SplitFileName[DiskNum]=FileTitle+FileNum;
	filed.Open(SplitFileName[DiskNum],CFile::modeCreate|CFile::modeWrite,0);
	CString BatContent=_T("copy ");
	CString BatFile[20];
	for(i=0;i<=DiskNum;i++)
	{
		BatFile[i]=SplitFileName[i]+_T("/b");
		BatContent +=BatFile[i];
		if(i!=DiskNum-1)
			BatContent +=_T("+");
		else
			BatContent +=_T(" ");
	}
	BatContent +=m_fName;
	//按照"copy filename1/b＋filename2/b＋…＋filenameN/b filename"的順序寫入批處理
	for(i=0;i<DiskNum;i++)
	{
		unsigned char ch=BatContent[i];
		filed.Write(&ch,1);
	}
	return Success;
	filed.Close();
}