麻烦帮我解释个程序
// batchdlg.cpp : implementation file//
#include "stdafx.h"
#include "tlzw.h"
#include "batchdlg.h"
#include "lzwtable.h"
#include "lzwcode.h"
#include "lzwfile.h"
#ifdef _DEBUG
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CBatchDlg dialog
HWND hWndDlg=NULL;
CString szFileName;
void BatchEncodedBytes(void)
{
::SendMessage(hWndDlg,WM_LZW_ENCODE_BYTES,0,0);
}
void BatchDecodedBytes(void)
{
::SendMessage(hWndDlg,WM_LZW_DECODE_BYTES,0,0);
}
LONG CBatchDlg::OnDecodeBytes(UINT uP,LONG lP)
{
char szPercent[200];
CClientDC dc(this);
dc.SelectStockObject(WHITE_BRUSH);
dc.Rectangle(m_rcDraw);
dc.SelectStockObject(LTGRAY_BRUSH);
CRect rcPercent=m_rcDraw;
if(++m_iPercent>=101)
m_iPercent=0;
rcPercent.right=rcPercent.left+m_iPercent*3;
dc.Rectangle(rcPercent);
sprintf(szPercent,"%s %d%%",(LPCSTR)szFileName,m_iPercent);
dc.SetBkMode(TRANSPARENT);
dc.SetTextColor(RGB(0,0,255));
dc.DrawText(szPercent,strlen(szPercent),m_rcDraw,DT_CENTER|DT_VCENTER|DT_SINGLELINE);
return 0L;
}
LONG CBatchDlg::OnEncodeBytes(UINT uP,LONG lP)
{
if(++m_iPercent>=101)
m_iPercent=0;
if(m_iPercent%5!=0)
return 0L;
char szPercent[200];
CClientDC dc(this);
dc.SelectStockObject(WHITE_BRUSH);
dc.Rectangle(m_rcDraw);
dc.SelectStockObject(LTGRAY_BRUSH);
CRect rcPercent=m_rcDraw;
rcPercent.right=rcPercent.left+m_iPercent*3;
dc.Rectangle(rcPercent);
sprintf(szPercent,"%s %d%%",(LPCSTR)szFileName,m_iPercent);
dc.SetTextColor(RGB(0,0,255));
dc.SetBkMode(TRANSPARENT);
dc.DrawText(szPercent,strlen(szPercent),m_rcDraw,DT_CENTER|DT_VCENTER|DT_SINGLELINE);
return 0L;
}
CBatchDlg::CBatchDlg(LPCSTR pszFileName,CStringArray* pszNameArray,CWnd* pParent /*=NULL*/)
: CDialog(CBatchDlg::IDD, pParent),m_rcDraw(CPoint(0,50),CSize(300,30))
{
m_iPercent=0;
m_pszNameArray=pszNameArray;
m_szHGLZName=pszFileName;
m_fEncode=TRUE;
//{{AFX_DATA_INIT(CBatchDlg)
// NOTE: the ClassWizard will add member initialization here
//}}AFX_DATA_INIT
}
CBatchDlg::CBatchDlg(LPCSTR pszFileName,LPCSTR pszDirName,int* piPos,int iCount,CWnd* pParent /*=NULL*/)
: CDialog(CBatchDlg::IDD, pParent),m_rcDraw(CPoint(0,50),CSize(300,30))
{
m_szHGLZName=pszFileName;
m_fEncode=FALSE;
m_iPercent=0;
m_szDirName=pszDirName;
m_piPos=piPos;
m_iCount=iCount;
//{{AFX_DATA_INIT(CBatchDlg)
// NOTE: the ClassWizard will add member initialization here
//}}AFX_DATA_INIT
}
void CBatchDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CBatchDlg)
// NOTE: the ClassWizard will add DDX and DDV calls here
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CBatchDlg, CDialog)
ON_MESSAGE(WM_LZW_DECODE_BYTES,OnDecodeBytes)
ON_MESSAGE(WM_LZW_ENCODE_BYTES,OnEncodeBytes)
//{{AFX_MSG_MAP(CBatchDlg)
ON_WM_TIMER()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
int FindFileName(LPCSTR pszName);
void MakeFileName(LPCSTR pszIn,char* pszOut)
{
}
/*{
int iLen=strlen(pszName);
for(int i=iLen-1;i>=0;i--)
{
if(pszName[i]=='\\')
return i+1;
}
return 0;
}*/
/////////////////////////////////////////////////////////////////////////////
// CBatchDlg message handlers
void CBatchDlg::BeginDecode(void)
{
CStringArray array;
if(!LZWParseFileHead(m_szHGLZName,array))
{
array.RemoveAll();
OnOK();
return;
}
int iTotal=array.GetUpperBound()+1;
if(iTotal==0 )
{
array.RemoveAll();
AfxMessageBox("error batch parameter");
OnOK();
return;
}
for(int i=0;i<m_iCount;i++)
{
szFileName=array.GetAt(m_piPos[i]);
//MakeFileName(szPutName,szGetName);
m_iPercent=0;
LZWDecodeFileOnPosition(m_szHGLZName,m_szDirName,
(DWORD)m_piPos[i],BatchDecodedBytes);
}
array.RemoveAll();
OnOK();
}
void CBatchDlg::BeginBatch(void)
{
int iTotal=m_pszNameArray->GetUpperBound()+1;
if(iTotal==0 )
{
AfxMessageBox("error batch encode parameter");
OnOK();
return;
}
char szGetName[1000];
CString szTemp;
for(int i=0;i<iTotal;i++)
{
szTemp=m_pszNameArray->GetAt(i);
strcpy(szGetName,szTemp);
szFileName=(szGetName+FindFileName(szGetName));
//MakeFileName(szPutName,szGetName);
m_iPercent=0;
if(i==0)
LZWEncodeFile(szGetName,m_szHGLZName,BatchEncodedBytes);
else
LZWAddEncodeFile(szGetName,m_szHGLZName,BatchEncodedBytes);
}
OnOK();
}
void CBatchDlg::OnTimer(UINT nIDEvent)
{
CClientDC dc(this);
dc.SelectStockObject(WHITE_BRUSH);
dc.Rectangle(m_rcDraw);
KillTimer(1);
if(m_fEncode)
BeginBatch();
else
BeginDecode();
//SendMessage(WM_LZW_DECODE_BYTES);
//SendMessage(WM_LZW_ENCODE_BYTES);
CDialog::OnTimer(nIDEvent);
}
BOOL CBatchDlg::OnInitDialog()
{
CDialog::OnInitDialog();
hWndDlg=GetSafeHwnd();
SetTimer(1,10,NULL);
CRect rcC;
GetClientRect(rcC);
m_rcDraw+=CPoint((rcC.Width()-300)/2,0);
if(!m_fEncode)
SetWindowText("Batch DeCompress");
return TRUE; // return TRUE unless you set the focus to a control
}
