tsdlg.cpp

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// tsDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ts.h"
#include "tsDlg.h"
#include "Msg.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()

/////////////////////////////////////////////////////////////////////////////
// CTsDlg dialog

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

	m_pLSocket = NULL;
}

void CTsDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CTsDlg)
	DDX_Control(pDX, IDC_STATIC_NUM, m_staNum);
	DDX_Control(pDX, IDOK, m_btnClose);
	DDX_Control(pDX, IDC_LIST_MSG, m_listMsg);
	DDX_Control(pDX, IDC_BUTTON_LISTEN, m_btnListen);
	DDX_Text(pDX, IDC_EDIT_PORT, m_nPort);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CTsDlg, CDialog)
	//{{AFX_MSG_MAP(CTsDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON_LISTEN, OnButtonListen)
	ON_BN_CLICKED(IDOK, OnClose)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTsDlg message handlers

BOOL CTsDlg::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
	m_nPort = 8000;
	UpdateData(FALSE);
	GetDlgItem(IDOK)->EnableWindow(FALSE);

	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

//以下的函数代码是由编程者添加的！

//当单击“监听”按钮时，执行此函数，启动服务器端套接字的监听
void CTsDlg::OnButtonListen() 
{
	UpdateData(TRUE);    //获得用户输入
	//创建侦听套接字对象
	m_pLSocket = new CLSocket(this);
	//创建监听套接字的底层套接字，在用户指定的端口上侦听
	if (!m_pLSocket->Create(m_nPort))
	{
		delete m_pLSocket;   //错误处理
		m_pLSocket = NULL;
		AfxMessageBox("创建监听套接字错误");
		return;
	}
	//启动监听套接字，时刻准备接收客户端的连接请求
	if (!m_pLSocket->Listen())
	{
		delete m_pLSocket;   //错误处理
		m_pLSocket = NULL;
		AfxMessageBox("启动监听错误");
		return;
	}
	GetDlgItem(IDC_EDIT_PORT)->EnableWindow(FALSE);
	GetDlgItem(IDC_BUTTON_LISTEN)->EnableWindow(FALSE);
	GetDlgItem(IDOK)->EnableWindow(TRUE);
}

//当单击“停止服务”按钮时，执行此函数，
void CTsDlg::OnClose() 
{
	CMsg  msg;
	msg.m_strText="服务器终止服务!";
	//
	delete m_pLSocket;
	m_pLSocket=NULL;
	//对连接列表进行处理
	while (!m_connList.IsEmpty())
	{
		//向每一个连接的客户机发送"服务器终止服务！"的消息
		//并逐个删除已建立的连接
		CCSocket* pSocket
			=(CCSocket*)m_connList.RemoveHead();
		pSocket->SendMessage(&msg);
		delete pSocket;
	}
		
	//CDialog::OnOK();
	//清除列表框
	while (m_listMsg.GetCount()!=0)
	               m_listMsg.DeleteString(0);
	GetDlgItem(IDC_EDIT_PORT)->EnableWindow(TRUE);
	GetDlgItem(IDC_BUTTON_LISTEN)->EnableWindow(TRUE);
	GetDlgItem(IDOK)->EnableWindow(FALSE);
}

//接受连接请求
void CTsDlg::OnAccept()
{
	//创建用于与客户端连接并交换数据的套接字对象
	CCSocket* pSocket = new CCSocket(this);
	if (m_pLSocket->Accept(*pSocket))  //接受客户的连接请求
	{
		//对连接套接字初始化
		pSocket->Initialize();
		m_connList.AddTail(pSocket);
		//更新在线人数
		CString strTemp;
		strTemp.Format("在线人数：%d",m_connList.GetCount());
		m_staNum.SetWindowText(strTemp);
	} else delete pSocket;
}

//获取客户机的发送消息
void CTsDlg::OnReceive(CCSocket* pSocket)
{
	static CMsg  msg;
	do {
		//接收客户发来的消息
		pSocket->ReceiveMessage(&msg);
		//将客户的信息显示在服务器的对话框中
		m_listMsg.AddString(msg.m_strText);
		//向所有客户返回该客户发来的消息
		backClients(&msg);
		
		//如果客户机关闭,将与该客户机的连接从连接列表中删除
		if (msg.m_bClose)
		{
			pSocket->Close();
			POSITION pos,temp;
			for (pos=m_connList.GetHeadPosition();pos!=NULL;)
			{
				//对于已经关闭的客户机
				//在消息列表中将已经建立的连接删除
				temp=pos;
				CCSocket* pSock=(CCSocket*)m_connList.GetNext(pos);
				//匹配成功
				if (pSock==pSocket)
				{
					m_connList.RemoveAt(temp);
					CString strTemp;
					//更新在线人数
					strTemp.Format("在线人数：%d",m_connList.GetCount());
					m_staNum.SetWindowText(strTemp);
					break;
				}
			}
			delete pSocket;
			break;
		}
	} while (!pSocket->m_pArchiveIn->IsBufferEmpty());
}

//当服务器收到某个客户发来的信息后，将它转发给聊天室的所有的客户
void CTsDlg::backClients(CMsg* pMsg)
{
	for (POSITION pos=m_connList.GetHeadPosition();pos!=NULL;)
		{
			//获得连接列表的成员
			CCSocket* pSocket
				=(CCSocket*)m_connList.GetNext(pos);
			pSocket->SendMessage(pMsg);
		}
}