clientdlg.cpp

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// ClientDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ChatClient.h"
#include "ClientDlg.h"
#include "ChatSocket.h"
#include "SetupDlg.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()

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

CClientDlg::CClientDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CClientDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CClientDlg)
	m_strMsg = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	
	m_bAutoChat=FALSE;
	m_pSocket=NULL;
	m_pFile=NULL;
	m_pArchiveIn=NULL;
	m_pArchiveOut=NULL;
}

void CClientDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CClientDlg)
	DDX_Control(pDX, IDC_LIST_MSG, m_ListMsg);
	DDX_Text(pDX, IDC_EDIT_MSG, m_strMsg);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CClientDlg, CDialog)
	//{{AFX_MSG_MAP(CClientDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_DESTROY()
	ON_BN_CLICKED(IDOK, OnSend)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

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

BOOL CClientDlg::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

	//CSetupDlg类的对象
	CSetupDlg dlg;
	while (TRUE)
	{
		//调用对话框
		//接受用户的输入
		if (dlg.DoModal()!=IDOK)
		{
			//退出应用程序
			CDialog::OnOK();
			return TRUE;
		}
		//向服务器发送连接请求
		//使用从设置窗口获得的
		//客户机名称、服务器地址和通信端口号
		if (ConnectSocket(dlg.m_strHandle,dlg.m_strServer,dlg.m_nPort))
			return TRUE;
		if (AfxMessageBox("请尝试别的地址！",MB_YESNO)==IDNO)
		{
			//退出应用程序
			CDialog::OnOK();
			return TRUE;
		}
	}
	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;
}

//在CClientDlg类终止运行时进行的后续处理
void CClientDlg::OnDestroy() 
{
	CDialog::OnDestroy();
	
	// TODO: Add your message handler code here
	m_bAutoChat=FALSE;
	if ((m_pSocket!=NULL)&&(m_pFile!=NULL)&&(m_pArchiveOut!=NULL))
	{
		//发送客户离开聊天室的消息
		CMsg msg;
		CString strTemp;
		strTemp=":离开聊天室！";
		msg.m_bClose=TRUE;
		msg.m_strText=m_strHandle+strTemp;
		msg.Serialize(*m_pArchiveOut);
		m_pArchiveOut->Flush();
	}
	//删除CArchive对象
	delete m_pArchiveOut;
	m_pArchiveOut=NULL;
	//删除CArchive对象
	delete m_pArchiveIn;
	m_pArchiveIn=NULL;
	delete m_pFile;
	//删除CSOcketFile对象
	m_pFile=NULL;
	if (m_pSocket!=NULL)
	{
		BYTE Buffer[50];
		m_pSocket->ShutDown();
		while (m_pSocket->Receive(Buffer,50)>0);
	}
	delete m_pSocket;
	m_pSocket=NULL;
		
}

void CClientDlg::OnSend() 
{
	// TODO: Add extra validation here
	//获得当前用户输入的信息
	UpdateData(TRUE);
	//信息是否为空字符串
	if (!m_strMsg.IsEmpty())
	{
		//非空字符串
		//发送信息
		this->SendMsg(m_strMsg);
		//信息设为空字符串
		m_strMsg=_T("");
		//更新当前显示
		UpdateData(FALSE);
	}
}

//建立连接
BOOL CClientDlg::ConnectSocket(LPCTSTR lpszHandle,LPCTSTR lpszAddress,UINT nPort)
{
	//存储用户名
	m_strHandle=lpszHandle;
	//创建套接字对象
	m_pSocket=new CChatSocket(this);
	if (!m_pSocket->Create())
	{
		//错误处理
		delete m_pSocket;
		m_pSocket=NULL;
		AfxMessageBox("套接字创建错误！");
		return FALSE;
	}
	//发送连接请求
	while (!m_pSocket->Connect(lpszAddress,nPort))
	{
		//无法连接
		if (AfxMessageBox("无法连接服务器！\n重试？",MB_YESNO)==IDNO)
		{
			//错误处理
			delete m_pSocket;
			m_pSocket=NULL;
			return FALSE;
		}
	}
	//创建CSocketFile类对象
	m_pFile=new CSocketFile(m_pSocket);
	//创建CArchive类对象
	m_pArchiveIn=new CArchive(m_pFile,CArchive::load);
	m_pArchiveOut=new CArchive(m_pFile,CArchive::store);
	//发送消息
	//表明该客户进入聊天室
	CString strTemp;
	strTemp="进入聊天室！";
	SendMsg(strTemp);
	return TRUE;
}

//读取信息
void CClientDlg::OnReceive()
{
	do
	{
		//接收消息
		ReceiveMsg();
		if (m_pSocket==NULL)
			return;
	}
	while (!m_pArchiveIn->IsBufferEmpty());
}

//发送消息
void CClientDlg::SendMsg(CString& strText)
{
	if (m_pArchiveOut!=NULL)
	{
		CMsg msg;
		//消息预处理
		//表明消息的来源
		msg.m_strText=m_strHandle+_T(":")+strText;
		TRY
		{
			//发送消息
			msg.Serialize(*m_pArchiveOut);
			//将CArchive对象中数据强制存储到CSocketFile对象中
			m_pArchiveOut->Flush();
		}
		CATCH(CFileException,e)
		{
			//错误处理
			m_bAutoChat=FALSE;
			m_pArchiveOut->Abort();
			delete m_pArchiveOut;
			m_pArchiveOut=NULL;
			CString strTemp;
			strTemp="服务器重置连接！";
			DisplayMsg(strTemp);
		}
		END_CATCH
	}
}

//接收消息
void CClientDlg::ReceiveMsg()
{
	CMsg msg;
	TRY
	{
		//接收消息
		msg.Serialize(*m_pArchiveIn);
		while (!msg.m_msgList.IsEmpty())
		{
			CString strTemp;
			//获取消息内容
			strTemp=msg.m_msgList.RemoveHead();
			//显示消息
			DisplayMsg(strTemp);
		}
	}
	CATCH(CFileException,e)
	{
		//错误处理
		m_bAutoChat=FALSE;
		msg.m_bClose=TRUE;
		m_pArchiveOut->Abort();
		CString strTemp;
		strTemp="服务器重置连接！";
		DisplayMsg(strTemp);
		strTemp="连接关闭！";
		DisplayMsg(strTemp);
	}
	END_CATCH
	if (msg.m_bClose)
	{
		//处理服务器关闭的消息
		delete m_pArchiveIn;
		m_pArchiveIn=NULL;
		delete m_pArchiveOut;
		m_pArchiveOut=NULL;
		delete m_pFile;
		m_pFile=NULL;
		delete m_pSocket;
		m_pSocket=NULL;
	}
}

//显示消息
void CClientDlg::DisplayMsg(LPCTSTR lpszText)
{
	//显示消息
	m_ListMsg.AddString(lpszText);
}