// CaserDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Caser.h"
#include "CaserDlg.h"
#include <math.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()

/////////////////////////////////////////////////////////////////////////////
// CCaserDlg dialog

CCaserDlg::CCaserDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCaserDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CCaserDlg)
	m_plaintext = _T("");
	m_ciphertext = _T("");
	m_key = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CCaserDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CCaserDlg)
	DDX_Text(pDX, myplaintext, m_plaintext);
	DDX_Text(pDX, myciphertext, m_ciphertext);
	DDX_Text(pDX, myKey, m_key);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CCaserDlg, CDialog)
	//{{AFX_MSG_MAP(CCaserDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_EN_CHANGE(myplaintext, OnChangemyplaintext)
	ON_BN_CLICKED(my_Clear, OnClear)
	ON_BN_CLICKED(myCE, OnmyCE)
	ON_BN_CLICKED(myEC, OnmyEC)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCaserDlg message handlers

BOOL CCaserDlg::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 CCaserDlg::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 CCaserDlg::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 CCaserDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CCaserDlg::OnChangemyplaintext() 
{
	// TODO: If this is a RICHEDIT control, the control will not
	// send this notification unless you override the CDialog::OnInitDialog()
	// function and call CRichEditCtrl().SetEventMask()
	// with the ENM_CHANGE flag ORed into the mask.
	
	// TODO: Add your control notification handler code here
	
}

void CCaserDlg::OnClear()              //清空按鈕
{
	// TODO: Add your control notification handler code here
	UpdateData(TRUE);
	//MessageBox("OnClear Ok");
        m_plaintext="\0";
	m_ciphertext="\0";
	m_key="\0";
	UpdateData(FALSE);
	
}

void CCaserDlg::OnmyCE() 	    	//解密按鈕
{
	// TODO: Add your control notification handler code here
	
        UpdateData(TRUE);
	//MessageBox("EC Ok");
	/*=========CString->char===========*/
	int strLength1=m_ciphertext.GetLength()+1;
	char chArray[100];
	memset(chArray,0,sizeof(char)*100);
	strncpy(chArray,m_ciphertext,strLength1);
	chArray[strLength1]='\0';

       /*=========CString->int=============*/

	int key;
	key=atoi(m_key);

	for(int i=0;chArray[i]!='\0';i++)
	{
		chArray[i]=(char)('a'+(chArray[i]-'a'+abs(26-key))%26);	//解密算法的關鍵一步 （26-key）
	}

	/*========char->CString================*/
	m_plaintext.Format("%s",chArray);

	UpdateData(FALSE);

	
}
					  //加密按鈕
void CCaserDlg::OnmyEC() 
{
	// TODO: Add your control notification handler code here
	
   
	UpdateData(TRUE);
	//MessageBox("EC Ok");
	/*=========CString->char===========*/
	int strLength1=m_plaintext.GetLength()+1;
	char chArray[100];
	memset(chArray,0,sizeof(char)*100);
	strncpy(chArray,m_plaintext,strLength1);
	chArray[strLength1]='\0';

	/*=========CString->int=============*/
	int key;
	key=atoi(m_key);

	/*=============加密===================*/
	for(int i=0;chArray[i]!='\0';i++)
	{
		chArray[i]=(char)('a'+(chArray[i]-'a'+key)%26);
	}

	/*========char->CString================*/
	m_ciphertext.Format("%s",chArray);

	UpdateData(FALSE);

	
}