pipeclientdlg.cpp

<win2k程序设计>的源码.麦格劳希尔,清华出版.作者:Raj Rajagopal & Subodh Monica

// PipeClientDlg.cpp : implementation file
//

#include "stdafx.h"
#include "PipeClient.h"
#include "PipeClientDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

#define BUFFER_SIZE 256

#define WM_USER_UPDATEDATA   WM_USER+200
#define WM_USER_EXIT         WM_USER+201


UINT ReadServerData( LPVOID hWnd);

/////////////////////////////////////////////////////////////////////////////
// CPipeClientDlg dialog

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

void CPipeClientDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CPipeClientDlg)
	DDX_Text(pDX, IDC_EDIT, m_pipedata);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CPipeClientDlg, CDialog)
	//{{AFX_MSG_MAP(CPipeClientDlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
    ON_MESSAGE(WM_USER_UPDATEDATA, OnUpdateData)
    ON_MESSAGE(WM_USER_EXIT, OnExit)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CPipeClientDlg message handlers

BOOL CPipeClientDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// 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
    AfxBeginThread(ReadServerData, GetSafeHwnd());
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

// 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 CPipeClientDlg::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 CPipeClientDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

LRESULT CPipeClientDlg::OnUpdateData(WPARAM wParam, LPARAM lParam)
{
    m_pipedata = (LPSTR)lParam;
    UpdateData(FALSE);
    return 0;
}

LRESULT CPipeClientDlg::OnExit(WPARAM wParam, LPARAM lParam)
{
    CDialog::EndDialog(IDOK);
    return 0;
}



UINT ReadServerData( LPVOID hWnd)
{
    HANDLE hRead = GetStdHandle(STD_INPUT_HANDLE);
    BOOL    rc;
    DWORD dwBytesRead = 3;
    char * szBuf = new char [BUFFER_SIZE];
    while (dwBytesRead > 2)
    {
        dwBytesRead = 0;
        rc = ReadFile (hRead, szBuf, BUFFER_SIZE, &dwBytesRead, NULL);
        if (rc == FALSE)
            break;
        if (dwBytesRead)
        {
            szBuf[dwBytesRead] = 0;
            SendMessage((HWND)hWnd, WM_USER_UPDATEDATA, NULL, (LPARAM)szBuf);
        }
    }
    delete [] szBuf;
    PostMessage((HWND)hWnd, WM_USER_EXIT, NULL, NULL);
    return 0;
}