talkdlg.cpp

一个简单的聊天室程序

// TalkDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Talk.h"
#include "TalkDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CTalkDlg dialog

CTalkDlg::CTalkDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CTalkDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CTalkDlg)
	m_strMsg = _T("");
	m_strServName = _T("");
	m_nServPort = 0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CTalkDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CTalkDlg)
	DDX_Control(pDX, IDC_LIST_SEND, m_listSend);
	DDX_Control(pDX, IDC_LIST_RECEIVED, m_listReceived);
	DDX_Control(pDX, IDC_COMBO_TYPE, m_cmbType);
	DDX_Control(pDX, IDC_BTN_CONNECT, m_btnConnect);
	DDX_Text(pDX, IDC_EDIT_MSG, m_strMsg);
	DDX_Text(pDX, IDC_EDIT_SERVNAME, m_strServName);
	DDX_Text(pDX, IDC_EDIT_SERVPORT, m_nServPort);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CTalkDlg, CDialog)
	//{{AFX_MSG_MAP(CTalkDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_CBN_SELCHANGE(IDC_COMBO_TYPE, OnSelchangeComboType)
	ON_BN_CLICKED(IDC_BTN_CONNECT, OnBtnConnect)
	ON_BN_CLICKED(IDOK, OnSendMsg)
	ON_BN_CLICKED(IDC_BTN_CLOSE, OnBtnClose)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTalkDlg message handlers

BOOL CTalkDlg::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

	//初始化控制变量

	m_cmbType.SetCurSel(1);//设置套接字类型为——客户机
	m_strServName="localhost";//设置服务器名为——localhost
	m_nServPort=8000;//端口为——8000
	//更新控制变量
	UpdateData(FALSE);
	//设置套接字成员的CTalkDlg类指针
	m_sListenSocket.SetParent(this);
	m_sConnectSocket.SetParent(this);
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CTalkDlg::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 CTalkDlg::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 CTalkDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CTalkDlg::OnSelchangeComboType() 
{
	// TODO: Add your control notification handler code here
	//Retrive data from dialog 
	UpdateData(TRUE);
	if(m_cmbType.GetCurSel()==0)
		m_btnConnect.SetWindowText("侦听");
	else
		m_btnConnect.SetWindowText("连接");
}

void CTalkDlg::OnBtnConnect() 
{
	//从对话框取回数据
	UpdateData(TRUE);

	//禁用连结和类型相关控件
	GetDlgItem(IDC_BTN_CONNECT)->EnableWindow(FALSE);
	GetDlgItem(IDC_EDIT_SERVNAME)->EnableWindow(FALSE);
	GetDlgItem(IDC_EDIT_SERVPORT)->EnableWindow(FALSE);
	GetDlgItem(IDC_STATIC_SERVNAME)->EnableWindow(FALSE);
	GetDlgItem(IDC_STATIC_SERVPORT)->EnableWindow(FALSE);
	GetDlgItem(IDC_COMBO_TYPE)->EnableWindow(FALSE);
	
	//是“客户机”，还是“服务器”？
	if(m_cmbType.GetCurSel()==0)
	{
		//服务器

		//创建与设置的端口绑定的套接字
		m_sListenSocket.Create(m_nServPort);

		//开始侦听连接请求
		m_sListenSocket.Listen();
	}
	else
	{
		//客户机

		//创建一个默认的套接字
		m_sConnectSocket.Create();

		//发出连接请求
		m_sConnectSocket.Connect(m_strServName,m_nServPort);
	}
}

void CTalkDlg::OnAccept()
{
	//对于服务器，接受连接请求
	m_sListenSocket.Accept(m_sConnectSocket);

	//激活消息输入和发送的相关控件
	GetDlgItem(IDC_EDIT_MSG)->EnableWindow(TRUE);
	GetDlgItem(IDOK)->EnableWindow(TRUE);
	GetDlgItem(IDC_STATIC_MSG)->EnableWindow(TRUE);
}

void CTalkDlg::OnConnect()
{
	//对于客户机

	//激活消息输入和发送的相关控件
	GetDlgItem(IDC_EDIT_MSG)->EnableWindow(TRUE);
	GetDlgItem(IDOK)->EnableWindow(TRUE);
	GetDlgItem(IDC_STATIC_MSG)->EnableWindow(TRUE);

	//激活关闭按钮，这仅对客户机有效
	GetDlgItem(IDC_BTN_CLOSE)->EnableWindow(TRUE);

}

void CTalkDlg::OnSendMsg() 
{
	// TODO: Add your control notification handler code here
	int nLen;//消息长度
	int nSend;//已发送的消息的长度
	
	//从对话框取回数据
	UpdateData(TRUE);

	//判断要发送的消息是否为空？
	if(!m_strMsg.IsEmpty())
	{
		//获取消息的长度
		nLen=m_strMsg.GetLength();

		//发送消息
		nSend=m_sConnectSocket.Send(LPCTSTR(m_strMsg),nLen);

		//发送是否成功？
		if(nSend!=SOCKET_ERROR)
		{
			//将消息添加到“已发送的消息”列表框
			m_listSend.AddString(m_strMsg);

			//更新对话框
			UpdateData(FALSE);
		}
		else
		{
			AfxMessageBox("信息发送错误！",MB_OK|MB_ICONSTOP);
		}

		//清除当前信息
		m_strMsg.Empty();

		//update the dialog
		UpdateData(FALSE);
	}
}

void CTalkDlg::OnReceive()
{
	char * pBuf=new char[1025];;
	int nBufSize=1024;
	int nReceived;
	CString strReceived;

	//接受消息
	nReceived=m_sConnectSocket.Receive(pBuf,nBufSize);

	//判断数据是否接受成功？
	if(nReceived!=SOCKET_ERROR)
	{
		//保留接受消息的有效部分
		pBuf[nReceived]=NULL;

		//将消息转化为CString对象
		strReceived=pBuf;

		//将消息添加到“已接受的消息”列表框中
		m_listReceived.AddString(strReceived);

		//更新对话框
		UpdateData(FALSE);
	}
	else
	{
		AfxMessageBox("信息接受错误！",MB_OK|MB_ICONSTOP);
	}
}

void CTalkDlg::OnClose()
{
	//关闭连接的套接字
	m_sConnectSocket.Close();

	//禁用消息输入和发送的相关控件
	GetDlgItem(IDC_EDIT_MSG)->EnableWindow(FALSE);
	GetDlgItem(IDOK)->EnableWindow(FALSE);
	GetDlgItem(IDC_STATIC_MSG)->EnableWindow(FALSE);
	GetDlgItem(IDC_BTN_CLOSE)->EnableWindow(FALSE);

	//清除列表框的内容
	while(m_listSend.GetCount()!=0)
		m_listSend.DeleteString(0);
	while(m_listReceived.GetCount()!=0)
		m_listReceived.DeleteString(0);

	//是否客户机？
	if(m_cmbType.GetCurSel()==1)
	{
		//对于客户机
		//激活与连接设置相关的控件
		GetDlgItem(IDC_BTN_CONNECT)->EnableWindow(TRUE);
		GetDlgItem(IDC_EDIT_SERVNAME)->EnableWindow(TRUE);
		GetDlgItem(IDC_EDIT_SERVPORT)->EnableWindow(TRUE);
		GetDlgItem(IDC_STATIC_SERVNAME)->EnableWindow(TRUE);
		GetDlgItem(IDC_STATIC_SERVPORT)->EnableWindow(TRUE);
		GetDlgItem(IDC_COMBO_TYPE)->EnableWindow(TRUE);
	}
}


void CTalkDlg::OnBtnClose() 
{
	// TODO: Add your control notification handler code here
	OnClose();
	
}