bztestdlg.cpp

bzlib,一个性能非常强劲的压缩库

// BZTestDlg.cpp : implementation file
//

#include "stdafx.h"
#include "BZTest.h"
#include "BZTestDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CBZTestDlg dialog

CBZTestDlg::CBZTestDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CBZTestDlg::IDD, pParent) , CBZ2Compress(m_szWriteBuffer,sizeof(m_szWriteBuffer)) , CBZ2Decompress(m_szWriteBuffer,sizeof(m_szWriteBuffer))
{
	//{{AFX_DATA_INIT(CBZTestDlg)
	m_szSource = _T("");
	m_szTarget = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CBZTestDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CBZTestDlg)
	DDX_Text(pDX, IDC_SOURCE, m_szSource);
	DDX_Text(pDX, IDC_TARGET, m_szTarget);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CBZTestDlg, CDialog)
	//{{AFX_MSG_MAP(CBZTestDlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BROWSESOURCE, OnBrowseSource)
	ON_BN_CLICKED(IDC_BROWSETARGET, OnBrowseTarget)
	ON_BN_CLICKED(IDC_COMPRESS, OnCompress)
	ON_BN_CLICKED(IDC_DECOMPRESS, OnDecompress)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBZTestDlg message handlers

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

	// 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
}

// 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 CBZTestDlg::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();
	}
}

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

void CBZTestDlg::OnBrowseSource() 
{
	UpdateData();
	CFileDialog Dlg(TRUE,NULL,m_szSource,OFN_HIDEREADONLY,_T("All Files (*.*)|*.*||"),this);
	if (Dlg.DoModal()!=IDOK)
		return;
	m_szSource=Dlg.GetPathName();
	UpdateData(FALSE);
}

void CBZTestDlg::OnBrowseTarget() 
{
	UpdateData();
	CFileDialog Dlg(FALSE,_T(".bz2"),m_szTarget,OFN_HIDEREADONLY|OFN_OVERWRITEPROMPT,_T("BZ2 Files (*.bz2)|*.bz2|All Files (*.*)|*.*||"),this);
	if (Dlg.DoModal()!=IDOK)
		return;
	m_szTarget=Dlg.GetPathName();
	UpdateData(FALSE);
}

void CBZTestDlg::OnCompress() 
{
	UpdateData();
	if (m_fileSource.Open(m_szSource,CFile::modeRead))
	{
		if (m_fileTarget.Open(m_szTarget,CFile::modeWrite|CFile::modeCreate))
		{
			unsigned int nPackedSize=Compress();
			if (nPackedSize>0)
			{
				CString szMessage;
				szMessage.Format(IDS_RATIO,m_fileSource.GetLength(),nPackedSize,nPackedSize*100/m_fileSource.GetLength());
				AfxMessageBox(szMessage,MB_ICONINFORMATION);
			}
			else
				AfxMessageBox(IDS_ERRCOMPRESS);
			m_fileTarget.Close();
		}
		else
			AfxMessageBox(IDS_ERRFILETARGET);
		m_fileSource.Close();
	}
	else
		AfxMessageBox(IDS_ERRFILETARGET);
}

unsigned int CBZTestDlg::OnCompressRead(char *&pBuffer)
{
	return m_fileSource.Read(pBuffer=m_szReadBuffer,sizeof(m_szReadBuffer));
}

void CBZTestDlg::OnCompressWrite(const char *pBuffer, unsigned int nLength)
{
	m_fileTarget.Write(pBuffer,nLength);
}

void CBZTestDlg::OnDecompress() 
{
	UpdateData();
	if (m_fileSource.Open(m_szSource,CFile::modeRead))
	{
		if (m_fileTarget.Open(m_szTarget,CFile::modeWrite|CFile::modeCreate))
		{
			unsigned int nOriginalSize=Decompress();
			if (nOriginalSize>0)
			{
				CString szMessage;
				szMessage.Format(IDS_RATIO,m_fileSource.GetLength(),nOriginalSize,nOriginalSize*100/m_fileSource.GetLength());
				AfxMessageBox(szMessage,MB_ICONINFORMATION);
			}
			else
				AfxMessageBox(IDS_ERRDECOMPRESS);
			m_fileTarget.Close();
		}
		else
			AfxMessageBox(IDS_ERRFILETARGET);
		m_fileSource.Close();
	}
	else
		AfxMessageBox(IDS_ERRFILETARGET);
}

unsigned int CBZTestDlg::OnDecompressRead(char* &pBuffer)
{
	return m_fileSource.Read(pBuffer=m_szReadBuffer,sizeof(m_szReadBuffer));
}

void CBZTestDlg::OnDecompressWrite(const char* pBuffer,unsigned int nLength)
{
	m_fileTarget.Write(pBuffer,nLength);
}