drawlineview.cpp

可以定时

// 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_FILE
static 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)
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
END_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 diagnostics

#ifdef _DEBUG
void CDrawLineView::AssertValid() const
{
	CView::AssertValid();
}

void CDrawLineView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

CDrawLineDoc* CDrawLineView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CDrawLineDoc)));
	return (CDrawLineDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CDrawLineView message handlers

void CDrawLineView::OnDrawLineThread() 
{
	PARAM *m_pParam[THREAD_NUM]={NULL,NULL,NULL};//传入线种入口函数
	 Invalidate();                                            //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
	SetTimer(0,100,NULL);
}

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

void CDrawLineView::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	CDC *m_Dc;
	CBrush m_Brush[3];
	m_Dc=GetDC();
	m_Brush[0].CreateSolidBrush(RGB(255,0,0));
	m_Brush[1].CreateSolidBrush(RGB(0,255,0));
	m_Brush[2].CreateSolidBrush(RGB(0,0,255));
	CBrush *m_pOldBrush=(CBrush*)m_Dc->SelectObject(&m_Brush[0]);
	Invalidate();
	for(int i=0;i<20;i++)
	{
		for(int j=0;j<3;j++)
		{
			m_Dc->SelectObject(&m_Brush[j]);
			m_Dc->Rectangle(10,35+j*50,10+i,55+j*50);
			Sleep(3);
		}
	}
	m_Dc->SelectObject(m_pOldBrush);
//	KillTimer(0);
	CView::OnTimer(nIDEvent);
}