cthreadexdlg.cpp

操作系统中的一个多进程的控制实例·可以对多进程理解有帮助

// CThreadExDlg.cpp : implementation file
//

#include "stdafx.h"
#include "CThreadEx.h"
#include "CThreadExDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CCThreadExDlg dialog

CCThreadExDlg::CCThreadExDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCThreadExDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CCThreadExDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CCThreadExDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CCThreadExDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CCThreadExDlg, CDialog)
	//{{AFX_MSG_MAP(CCThreadExDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDSTART, OnStart)
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCThreadExDlg message handlers

BOOL CCThreadExDlg::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
	bm[0].LoadBitmap (IDB_BITMAP2);		//载入位图
	bm[1].LoadBitmap (IDB_BITMAP3);		//载入位图
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

void CCThreadExDlg::OnStart() 
{
	// TODO: Add your control notification handler code here
	static BOOL bStarted=FALSE;				//是否启动
	if (!bStarted)							//启动
	{
		SetTimer(IDC_TIMER,500,NULL);		//每半秒触发定时器
		pMyThread=AfxBeginThread(MyThreadProc,this);//启动定义的工作线程
	}
	else
	{
		if (pMyThread)
		{
			pMyThread->PostThreadMessage (WM_QUIT,0,0);	//向工作线程发出退出命令
			::WaitForSingleObject(pMyThread->m_hThread ,INFINITE);//等待工作线程
			pMyThread=NULL;//销毁工作线程
		}
		KillTimer(IDC_TIMER);//主线程停止交替显示
	}
	bStarted=!bStarted;
	((CButton*)GetDlgItem(IDSTART))->SetWindowText((bStarted?_T("停止"):_T("启动")));	
}

void CCThreadExDlg::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	if (nIDEvent==IDC_TIMER)
	DisplayFace(CPoint(10,25));			//显示位图（左边）
	CDialog::OnTimer(nIDEvent);
}
void CCThreadExDlg::DisplayFace(CPoint p)
{
	static int i=0;
	ccs.Lock ();						//进入同步
	BITMAP bmo;
	bm[i].GetObject (sizeof(bmo),&bmo);
	CClientDC dc(this);
	CDC bmpDC;
	bmpDC.CreateCompatibleDC (&dc);
	bmpDC.SelectObject (&bm[i]);
	dc.BitBlt (p.x ,p.y ,bmo.bmWidth,bmo.bmHeight,&bmpDC,0,0,SRCCOPY);//显示位图
	i++;
	if (i==sizeof(bm)/sizeof(bm[0])) i=0;		//i交替取值0和1
	ccs.Unlock ();							//解除同步
}

UINT CCThreadExDlg::MyThreadProc(LPVOID pParam)
{
	CCThreadExDlg *me=(CCThreadExDlg *)pParam;
	MSG msg;
	while(!PeekMessage(&msg,NULL,0,0,PM_NOREMOVE))//检验是否有消息到达
	{
		me->DisplayFace (CPoint(180,25));
		::Sleep (250);							//延迟
	}
	return 0;
}