// drawLineView.h : interface of the CDrawLineView class///////////////////////////////////////////////////////////////////////////////#include <afxmt.h> #if !defined(AFX_DRAWLINEVIEW_H__4E81C72C_AC7A_46F7_AEC0_D20264EFB297__INCLUDED_)#define AFX_DRAWLINEVIEW_H__4E81C72C_AC7A_46F7_AEC0_D20264EFB297__INCLUDED_ #if _MSC_VER > 1000#pragma once#endif // _MSC_VER > 1000 #define THREAD_NUM 3//线程个数 typedef struct{ int m_nID;//标识是第几个启动的线程 HWND m_hWnd;//为了画图，需传入视图类CDrawLineView的窗口句柄}PARAM; UINT DrawLine(LPVOID);//线程入口函数 class CDrawLineView : public CView{protected: // create from serialization only CDrawLineView(); DECLARE_DYNCREATE(CDrawLineView) // Attributespublic: CDrawLineDoc* GetDocument();// Operationspublic: // Overrides // ClassWizard generated virtual function overrides //{{AFX_VIRTUAL(CDrawLineView) public: virtual void OnDraw(CDC* pDC);  // overridden to draw this view virtual BOOL PreCreateWindow(CREATESTRUCT& cs); protected: //}}AFX_VIRTUAL // Implementationpublic: virtual ~CDrawLineView(); protected: // Generated message map functionsprotected: //{{AFX_MSG(CDrawLineView) afx_msg void OnDrawLineThread(); afx_msg void OnUpdateDrawLineThread(CCmdUI* pCmdUI); afx_msg void OnDrawLineTimer(); afx_msg void OnUpdateDrawLineTimer(CCmdUI* pCmdUI); //}}AFX_MSG DECLARE_MESSAGE_MAP()public: CWinThread *m_pThread[THREAD_NUM];//创建线程后，产生的线程指针public:}; // drawLineView.cpp : implementation of the CDrawLineView class// #include "stdafx.h"#include "drawLine.h" #include "drawLineDoc.h"#include "drawLineView.h" #ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE[] = __FILE__;#endif ////////////////////////////////////////////////////////////////////////////// CDrawLineView IMPLEMENT_DYNCREATE(CDrawLineView, CView) BEGIN_MESSAGE_MAP(CDrawLineView, CView) //{{AFX_MSG_MAP(CDrawLineView) ON_COMMAND(ID_DRAW_LINE_THREAD, OnDrawLineThread) ON_UPDATE_COMMAND_UI(ID_DRAW_LINE_THREAD, OnUpdateDrawLineThread) ON_COMMAND(ID_DRAW_LINE_TIMER, OnDrawLineTimer) ON_UPDATE_COMMAND_UI(ID_DRAW_LINE_TIMER, OnUpdateDrawLineTimer) //}}AFX_MSG_MAPEND_MESSAGE_MAP() /////////////////////////////////////////////////////////////////////////////// CDrawLineView construction/destruction CDrawLineView::CDrawLineView(){ // TODO: add construction code here for(int i=0;i<THREAD_NUM;i++){  m_pThread[i]=NULL;//指向线程的批针初始化为零 }} CDrawLineView::~CDrawLineView(){} BOOL CDrawLineView::PreCreateWindow(CREATESTRUCT& cs){ // TODO: Modify the Window class or styles here by modifying //  the CREATESTRUCT cs  return CView::PreCreateWindow(cs);} /////////////////////////////////////////////////////////////////////////////// CDrawLineView drawing void CDrawLineView::OnDraw(CDC* pDC){ CDrawLineDoc* pDoc = GetDocument(); ASSERT_VALID(pDoc); // TODO: add draw code for native data here} /////////////////////////////////////////////////////////////////////////////// CDrawLineView message handlers void CDrawLineView::OnDrawLineThread() { PARAM *m_pParam[THREAD_NUM]={NULL,NULL,NULL};//传入线种入口函数                                              //的参数，初始化为空 for(int i=0;i<THREAD_NUM;i++){    m_pThread[i]=NULL;  m_pParam[i]=new PARAM;  memset((void*)m_pParam[i],0,sizeof(PARAM));//将为入口函数参数分配               //的内存全部置0值  //写入线程ID和窗口句柄  m_pParam[i]->m_nID=i;  m_pParam[i]->m_hWnd=GetSafeHwnd();  //启动线程  m_pThread[i]=AfxBeginThread(DrawLine,(LPVOID)(m_pParam[i])); }} void CDrawLineView::OnUpdateDrawLineThread(CCmdUI* pCmdUI) { // TODO: Add your command update UI handler code here //若线程全部启动，菜单转为灰色（不可用） pCmdUI->Enable(m_pThread[0]==NULL&&   m_pThread[1]==NULL&&   m_pThread[2]==NULL);} void CDrawLineView::OnDrawLineTimer() { // TODO: Add your command handler code here } void CDrawLineView::OnUpdateDrawLineTimer(CCmdUI* pCmdUI) { // TODO: Add your command update UI handler code here } //定义入口函数UINT DrawLine(LPVOID pParam){ PARAM *m_pParam=(PARAM*)pParam; CBrush m_Brush; CWnd m_Wnd; CDC *m_Dc;  //根据线程ID产生对应颜色的画刷 if(m_pParam->m_nID==0) {  m_Brush.CreateSolidBrush(RGB(255,0,0)); }else if(m_pParam->m_nID==1){  m_Brush.CreateSolidBrush(RGB(0,255,0)); }else{  m_Brush.CreateSolidBrush(RGB(0,0,255)); }  //根据窗口句柄，得到CDC m_Wnd.Attach(m_pParam->m_hWnd); m_Dc=m_Wnd.GetDC(); CBrush *m_pOldBrush=(CBrush*)m_Dc->SelectObject(&m_Brush);  //重复画矩形，每次前进一个像素 for(int i=1;i<300;i++){  m_Dc->Rectangle(10,35+m_pParam->m_nID*50,10+i,55+m_pParam->m_nID*50);  Sleep(100);//让线程暂停100ms，是为了可以明显的看到三个线程是同时执行的       //(至少我的肉眼看来是这样的，实际并非如此) }  m_Dc->SelectObject(m_pOldBrush); m_Wnd.Detach(); return 0;}//DrawLine  

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