processeventview.cpp

来自「深入浅出Visual C++入门进阶与应用实例 随书光盘 作者 何志丹」· C++ 代码 · 共 160 行

// ProcessEventView.cpp : implementation of the CProcessEventView class
//

#include "stdafx.h"
#include "ProcessEvent.h"

#include "ProcessEventDoc.h"
#include "ProcessEventView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CProcessEventView

IMPLEMENT_DYNCREATE(CProcessEventView, CView)

BEGIN_MESSAGE_MAP(CProcessEventView, CView)
	//{{AFX_MSG_MAP(CProcessEventView)
	ON_COMMAND(ID_PROCESS, OnProcess)
	ON_COMMAND(ID_EVENT, OnEvent)
	ON_WM_DESTROY()
	ON_WM_TIMER()
	//}}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)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CProcessEventView construction/destruction

CProcessEventView::CProcessEventView()
{
	m_nXPos = 0 ;
	m_uOffSet = 28 ;	
}

CProcessEventView::~CProcessEventView()
{
}

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

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CProcessEventView drawing

void CProcessEventView::OnDraw(CDC* pDC)
{
	CProcessEventDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	
	//m_nXPos是横坐标,50是纵坐标,第三个参数是输出字符串
	pDC->TextOut(m_nXPos,50,"www.vcshare.net 欢迎你!");		
}

/////////////////////////////////////////////////////////////////////////////
// CProcessEventView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CProcessEventView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CProcessEventView message handlers

void CProcessEventView::AdjustXPos()
{
	if(NULL == GetSafeHwnd())
		return  ;
	
	CRect rClient;
	GetClientRect(&rClient);//得到客户区大小
	int nWidth = rClient.Width();//客户区的宽度
	UINT uOffSet = m_uOffSet ;
	if(nWidth < uOffSet + m_nXPos )
		uOffSet -= nWidth ;//超过最右端,移动左边
	m_nXPos += uOffSet ;
}


void CProcessEventView::OnProcess() 
{
	for(int i = 0 ; i < 100 ; i++ )//滚动100次
	{
		//调整横坐标
		AdjustXPos();
		//停一会,以免刷新过快
		Sleep(500);
		//刷新
		Invalidate();
		UpdateWindow();
	}	
}

void CProcessEventView::OnEvent() 
{
	m_uTimer = SetTimer(1,500,NULL);	
}

void CProcessEventView::OnDestroy() 
{
	CView::OnDestroy();
	
	if(0 != m_uTimer )
		KillTimer(m_uTimer);//释放记数器

}

void CProcessEventView::OnTimer(UINT nIDEvent) 
{
	AdjustXPos();
	Invalidate();
	
	CView::OnTimer(nIDEvent);
}