clientdlg.cpp

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// ClientDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Client.h"
#include "ClientDlg.h"
#include"MY_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()

/////////////////////////////////////////////////////////////////////////////
// CClientDlg dialog

CClientDlg::CClientDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CClientDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CClientDlg)
	m_selected = _T("");
	m_readymsg = _T("");
	m_yourname = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	m_psocket=NULL;
	m_pin=NULL;
	m_pout=NULL;
	m_pfile=NULL;
}

void CClientDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CClientDlg)
	DDX_Control(pDX, IDC_SEND, m_send);
	DDX_Control(pDX, IDC_CHATMSG, m_chatcontent);
	DDX_Control(pDX, IDC_ONLINE, m_namelist);
	DDX_Control(pDX, IDC_CHAT, m_chat);
	DDX_CBString(pDX, IDC_ONLINE, m_selected);
	DDX_Text(pDX, IDC_READYMSG, m_readymsg);
	DDX_Text(pDX, IDC_YOURNAME, m_yourname);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CClientDlg, CDialog)
	//{{AFX_MSG_MAP(CClientDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_CBN_SELCHANGE(IDC_ONLINE, OnSelchangeOnline)
	ON_BN_CLICKED(IDC_CHAT, OnChat)
	ON_BN_CLICKED(IDC_QUIT, OnQuit)
	ON_BN_CLICKED(IDC_SEND, OnSend)
	ON_WM_DESTROY()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CClientDlg message handlers

BOOL CClientDlg::OnInitDialog()
{
	CConnect connect;
	//connect.DoModal();
	//int connresult;
	do{
		connect.DoModal();//显示连接对话框
	}while(!connect.quit&&!ConnectToServer(connect.m_username,connect.m_ipaddr));
	if(connect.quit)
	{
		connected=false;
	}
	else
	    connected=true;
	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
	nIndex=-1;
	if(!connected)
	m_chat.EnableWindow(FALSE);//没连接服务器端，不能选中通讯对象
	m_send.EnableWindow(FALSE);//没连接服务器端，不能发送数据
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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


bool CClientDlg::ConnectToServer(LPCTSTR name, LPCSTR ipaddr)//向服务器发送连接消息
{
	m_yourname=name;
	m_pname=name;
	m_psocket=new CChatSocket(this);
	if(!m_psocket->Create())//创建套接字
	{
		delete m_psocket;
		m_psocket=NULL;
		MessageBox("Socket Created error!");
		return false;
	}
	while(!m_psocket->Connect(ipaddr,5555))//连接服务器
	{
		CString strTemp;
		strTemp.LoadString(IDS_CONNECTIONERROR);
		if(AfxMessageBox("连接错误，重连？",MB_YESNO)==IDNO)
		{
			delete m_psocket;
			m_psocket=NULL;
			return false;
		}
	}
	m_pfile=new CSocketFile(m_psocket);//连接成功，初始化文件对象
	m_pin=new CArchive(m_pfile,CArchive::load);
	m_pout=new CArchive(m_pfile,CArchive::store);
	connected=true;
	msg.msgtype=MSG_CTS_newclient;//消息格式：C－>S 新上线客户端
	msg.from=0;
	msg.to=0;
	msg.chatcontent=name;
	sendmsg();//发送消息
	return true;
}

void CClientDlg::sendmsg()//发送消息给服务端
{
	if(m_pout&&connected)
	{
		TRY{
			msg.Serialize(*m_pout);
			m_pout->Flush();
		}CATCH(CFileException,e){
			m_pout->Abort();
			delete m_pout;
			m_pout=NULL;
		}END_CATCH
	}
}

void CClientDlg::receivemsg()//接收数据
{
	if(m_pin&&connected)
	{
		TRY{
			msg.Serialize(*m_pin);
			msginterpreter();
		}CATCH(CFileException,e){
			m_pin->Abort();
			delete m_pin;
			m_pin=NULL;
		}END_CATCH
	}

}
//接收数据
void CClientDlg::readall()
{
	do{
		receivemsg();
		if(m_psocket==NULL)
			return;
	}while(!m_pin->IsBufferEmpty());//缓冲区包含多个数据消息，需要循环直到所有的数据都被读出，并且缓冲区被清空
}

void CClientDlg::msginterpreter()//对消息进行处理
{
	switch(msg.msgtype)
	{
	case MSG_CTC:
		showmsg();
		break;
	case MSG_STC_newclient://客户端上线
		addonline();     
		break;
	case MSG_STC_alonline://已经在线的客户端
		addonline();
		break;
	case MSG_STC_clientdown://客户端下线
		delonline(msg.from);//客户端下线处理
		break;
	case MSG_STC_serverdown://服务器关闭
		delconnection();    //释放连接
		m_chat.EnableWindow(FALSE);//不允许再选中通讯对象
	    m_send.EnableWindow(FALSE);//不允许再发送数据
	    MessageBox("    服务器关闭!     ");
		break;
	case MSG_STC_yourmsg://服务端把客户端序号发给客户端
		this->seq=msg.from;
		break;
	default:
		MessageBox("Error!");
		break;
	}
}

void CClientDlg::showmsg()//显示通讯内容
{	
	for(POSITION pos=m_onlinelist.GetHeadPosition();pos!=NULL;)
	{
		OnlineNode* p=(OnlineNode*)m_onlinelist.GetNext(pos);
		if(p->seq==msg.from)
		{
			m_chatcontent.AddString(p->username+" 说:");//通讯内容，显示发送端用户名
			m_chatcontent.AddString("  "+msg.chatcontent);//msg.chatcontent代表发送的内容
			break;
		}
	}
}

void CClientDlg::addonline()//客户端上线或在线处理
{
	m_namelist.AddString(msg.chatcontent);//获得在线或新上线的用户名
	OnlineNode* p=new OnlineNode;
	p->username=msg.chatcontent;
	p->seq=msg.from;        //在线或新上线用户编号
	m_onlinelist.AddTail(p);//保存客户端信息
}

void CClientDlg::delonline(int num)//客户端下线处理
{
	bool found=false;
	int i=0;
	POSITION prepos;
	for(POSITION pos=m_onlinelist.GetHeadPosition();pos!=NULL;i++)
	{
		prepos=pos;
        OnlineNode* p=(OnlineNode*)m_onlinelist.GetNext(pos);
		if(p->seq==num)
		{
			m_onlinelist.RemoveAt(prepos);//清除下线客户端信息
			found=true;
			break;
		}
	}
	if(found)
	{
		if(num==destchatter.seq)//查找下线客户端通讯对象
		{
			m_send.EnableWindow(FALSE);//不允许再向下线用户发消息
		    MessageBox("用户"+destchatter.username+": 下线了!");
		}
		if(i==nIndex)
		{
			m_selected=_T("");
			UpdateData(FALSE);
			nIndex=-1;
		}
		m_namelist.DeleteString(i);//清除客户端用户名
	}
}

void CClientDlg::delconnection()//释放连接
{
	connected=false;
	if(m_pin)
	{
		delete m_pin;
		m_pin=NULL;
	}
	if(m_pout)
	{
		delete m_pout;
		m_pout=NULL;
	}
	if(m_pfile)
	{
		delete m_pfile;
		m_pfile=NULL;
	}
	if(m_psocket)
	{
		delete m_psocket;
		m_psocket=NULL;
	}
}

void CClientDlg::OnSelchangeOnline()//选中通讯对象
{
	// TODO: Add your control notification handler code here
	nIndex=m_namelist.GetCurSel();
	m_namelist.GetLBText(nIndex,m_selected);
}

void CClientDlg::OnChat()//与被选中的客户端通讯
{
	// TODO: Add your control notification handler code here
	POSITION pos=m_onlinelist.FindIndex(nIndex);
	if(pos)
	{
		OnlineNode* p=(OnlineNode*)m_onlinelist.GetNext(pos);
		m_send.EnableWindow(TRUE);//允许发送数据
		destchatter.seq=p->seq;   //发送数据的目的端
		m_namelist.GetLBText(nIndex,destchatter.username);//被选中的客户端通讯若下线，获得其用户名
	}
	else{
        m_send.EnableWindow(FALSE);//不允许发送数据
		MessageBox("请选中聊天对象!");
	}
}

void CClientDlg::OnQuit() //退出
{
	// TODO: Add your control notification handler code here
	OnOK();
}

void CClientDlg::OnSend() //发送数据
{
	// TODO: Add your control notification handler code here
	UpdateData(TRUE);
    m_chatcontent.AddString(m_yourname+" :");//通讯内容，显示发送端用户名
	m_chatcontent.AddString("  "+m_readymsg);//通讯内容，显示发送数据内容
	msg.msgtype=MSG_CTC;
	msg.from=seq;
    msg.chatcontent=m_readymsg;
	msg.to=destchatter.seq;
	sendmsg();
	m_readymsg="";//清空通讯内容
	UpdateData(FALSE);
}

void CClientDlg::OnDestroy()//关闭对话框
{
	CDialog::OnDestroy();
	
	// TODO: Add your message handler code here
	if(m_psocket)
	{
		msg.msgtype=MSG_CTS_clientdown;
		msg.from=seq;
		msg.chatcontent=_T("");
		sendmsg();
		delconnection();
	}	
}