sampleview.cpp

这是书上的代码

// SampleView.cpp : implementation of the CSampleView class
//

#include "stdafx.h"
#include "Sample.h"

#include "SampleDoc.h"
#include "SampleView.h"
#include "MainFrm.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CSampleView

IMPLEMENT_DYNCREATE(CSampleView, CView)

BEGIN_MESSAGE_MAP(CSampleView, CView)
	//{{AFX_MSG_MAP(CSampleView)
	ON_COMMAND(ID_RUN_THREAD, OnRunThread)
	ON_UPDATE_COMMAND_UI(ID_RUN_THREAD, OnUpdateRunThread)
	ON_COMMAND(ID_RUN_STOP, OnRunStop)
	ON_WM_DESTROY()
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
	//添加自定义消息处理函数
	ON_MESSAGE (WM_USER_THREAD_FINISHED, OnThreadFinished)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSampleView construction/destruction

CSampleView::CSampleView()
{
	// TODO: add construction code here
	IsRun = false;
}

CSampleView::~CSampleView()
{
}

BOOL CSampleView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CSampleView drawing

void CSampleView::OnDraw(CDC* pDC)
{
	CSampleDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	CRect rt;
	GetClientRect(&rt);
	int x,y;
	x = (int)rt.Width()/2;        
	y = (int)rt.Height()/2;
	CString str;
	str.Format("子线程运行: %d 次",GetDocument()->ThreadNum);
	pDC->SetTextAlign(TA_CENTER);
	pDC->SetTextColor(RGB(0,0,255));
	pDC->TextOut(x,y,str);
}

/////////////////////////////////////////////////////////////////////////////
// CSampleView printing

BOOL CSampleView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CSampleView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CSampleView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CSampleView diagnostics

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

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

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

//----------------CSampleView message handlers-----------------------------
//---------------自定义消息处理函数,调用MFC成员函数------------------------
void CSampleView::OnThreadFinished(WPARAM wParam, LPARAM lParam)
{
	Invalidate();                                  //调用OnDraw()
	char frame_num[20];
	memset(frame_num, 0, sizeof(frame_num));
	CMainFrame* MFrame = (CMainFrame*)AfxGetMainWnd();
	sprintf(frame_num,"子线程运行次数: %d",GetDocument()->ThreadNum);
	MFrame->m_wndStatusBar.SetPaneText (1,frame_num,true);    //更新状态栏内容
}
//---------------------启动线程-----------------------------------------
void CSampleView::OnRunThread() 
{
    //指针调用MFC成员函数
	/*CWnd* pWnd = ::AfxGetMainWnd();
	AfxBeginThread (ThreadFunc, pWnd,
		            THREAD_PRIORITY_NORMAL,
		            0,0,NULL);*/

	//句柄调用MFC成员函数
	/*CWnd* pWnd = ::AfxGetMainWnd();
	AfxBeginThread (ThreadFunc, pWnd->m_hWnd,
		            THREAD_PRIORITY_NORMAL,
		            0,0,NULL);*/

	//通过消息调用MFC成员函数
	IsRun = true;
	THREADPARMS* ptp = new THREADPARMS;
	ptp->pt = this;            //当前视图类指针
	ptp->hWnd = this->m_hWnd;  //视图类句柄
	AfxBeginThread (ThreadFunc, ptp,
		            THREAD_PRIORITY_NORMAL,
		            0,0,NULL);
}
void CSampleView::OnUpdateRunThread(CCmdUI* pCmdUI) 
{	
	pCmdUI->SetCheck(IsRun);
}
//--------------------线程控制函数-----------------------------------
//通过指针调用MFC成员函数
/*UINT ThreadFunc (LPVOID pParam)
{
	CWnd* pWnd = (CWnd*)pParam;
	pWnd->GetParent();
	return 0;
}*/

//通过句柄调用MFC成员函数
/*UINT ThreadFunc (LPVOID pParam)
{
	CWnd* pWnd = CWnd::FromHandle((HWND)pParam);
	pWnd->GetParentFrame();
	return 0;
}*/

//通过发送消息调用MFC成员函数
UINT ThreadFunc (LPVOID pParam)
{
	THREADPARMS* ptp = (THREADPARMS*) pParam; 
	CSampleView* pt = (CSampleView*)ptp->pt;      //得到视图类指针
	HWND hWnd = ptp->hWnd;
	delete ptp;
	while(pt->IsRun)
	{
		Sleep(100);
		pt->GetDocument()->ThreadNum++;
		::PostMessage (hWnd, WM_USER_THREAD_FINISHED, 0, 0);//发送消息		
	}
	return 0;                                  //关闭线程
}
//-------------------------停止线程运行------------------------------
void CSampleView::OnRunStop() 
{
	IsRun = false;	
}
void CSampleView::OnDestroy() 
{
	CView::OnDestroy();
	IsRun = false;	
}
//----------------------------The End---------------------------------