SNMP编程

开发平台：
Visual C++

exam3View.cpp：源码内容
							// exam3View.cpp : implementation of the CExam3View class
//
#include "stdafx.h"
#include "exam3.h"
#include "exam3Doc.h"
#include "exam3View.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CExam3View
IMPLEMENT_DYNCREATE(CExam3View, CView)
BEGIN_MESSAGE_MAP(CExam3View, CView)
	//{{AFX_MSG_MAP(CExam3View)
	ON_COMMAND(ID_NOMODE_DIALOG, OnNomodeDialog)
	ON_MESSAGE(WM_DELETE_POINT,OnDeletePoint)
	ON_UPDATE_COMMAND_UI(ID_NOMODE_DIALOG, OnUpdateNomodeDialog)
	ON_WM_LBUTTONUP()
	ON_WM_MOUSEMOVE()
	//}}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()
/////////////////////////////////////////////////////////////////////////////
// CExam3View construction/destruction
CExam3View::CExam3View()
{
	// TODO: add construction code here
	m_pPointInfo=NULL;
}
CExam3View::~CExam3View()
{
	if(m_pPointInfo!=NULL)
	{
		m_pPointInfo->DestroyWindow();
		delete m_pPointInfo;
	}
}
BOOL CExam3View::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs
	return CView::PreCreateWindow(cs);
}
/////////////////////////////////////////////////////////////////////////////
// CExam3View drawing
void CExam3View::OnDraw(CDC* pDC)
{
	CExam3Doc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	CPen pen,*pOldPen;
	pen.CreatePen(PS_SOLID,1,RGB(255,0,0));
	pOldPen=pDC->SelectObject(&pen);
    pDC->SetBkMode(TRANSPARENT);
	pDC->SetTextColor(RGB(0,255,0));
	for(int i=0;i<m_arArray.GetSize();i++)
	{
		CPoint point=m_arArray.GetAt(i);
		pDC->MoveTo(point.x-5,point.y);
		pDC->LineTo(point.x+5,point.y);
		pDC->MoveTo(point.x,point.y-5);
		pDC->LineTo(point.x,point.y+5);
		CString szText;
		szText.Format("%d",i+1);
		pDC->TextOut(point.x+3,point.y+3,szText);
	}
	pDC->SelectObject(pOldPen);
}
/////////////////////////////////////////////////////////////////////////////
// CExam3View printing
BOOL CExam3View::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}
void CExam3View::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}
void CExam3View::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}
void CExam3View::OnInitialUpdate()
{
	CView::OnInitialUpdate();
	m_pPointInfo=new CPointInfo(this);
	if(m_pPointInfo!=NULL)
	{
		m_pPointInfo->Create(IDD_MOUSE_POINT_DIALOG,this);
		m_pPointInfo->ShowWindow(SW_SHOW);
	}
	else
		MessageBox("创建CPointInfo对象失败！","错误",MB_OK);
}
/////////////////////////////////////////////////////////////////////////////
// CExam3View diagnostics
#ifdef _DEBUG
void CExam3View::AssertValid() const
{
	CView::AssertValid();
}
void CExam3View::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}
CExam3Doc* CExam3View::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CExam3Doc)));
	return (CExam3Doc*)m_pDocument;
}
#endif //_DEBUG
/////////////////////////////////////////////////////////////////////////////
// CExam3View message handlers
void CExam3View::OnNomodeDialog() 
{
	// TODO: Add your command handler code here
	if(m_pPointInfo!=NULL)
	{
		if(m_pPointInfo->IsWindowVisible())
			m_pPointInfo->ShowWindow(SW_HIDE);
		else
			m_pPointInfo->ShowWindow(SW_SHOW);
	}
}
void CExam3View::OnUpdateNomodeDialog(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here
	pCmdUI->SetCheck(m_pPointInfo!=NULL&&m_pPointInfo->IsWindowVisible());
	
}
//看看再............................................................
void CExam3View::OnLButtonUp(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	m_arArray.Add(point);
	CClientDC dc(this);
	CPen pen,*pOldPen;
	pen.CreatePen(PS_SOLID,1,RGB(255,0,0));
	pOldPen=dc.SelectObject(&pen);
	dc.MoveTo(point.x-5,point.y);
	dc.LineTo(point.x+5,point.y);
	dc.MoveTo(point.x,point.y-5);
	dc.LineTo(point.x,point.y+5);
	dc.SelectObject(pOldPen);
	dc.SetBkMode(TRANSPARENT);
	dc.SetTextColor(RGB(0,255,0));
	CString szText;
    szText.Format("%d",m_arArray.GetUpperBound()+1);
	dc.TextOut(point.x+3,point.y+3,szText);
	if(m_pPointInfo!=NULL)
	{
		m_pPointInfo->SendMessage(WM_ADD_POINT,0,MAKELPARAM((WORD)point.x,(WORD)point.y));
	}
	CView::OnLButtonUp(nFlags, point);
}
void CExam3View::OnMouseMove(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	if(m_pPointInfo!=NULL)
	{
		m_pPointInfo->SendMessage(WM_MOUSE_CHANGED,0,MAKELPARAM((WORD)point.x,(WORD)point.y));
	}
	
	CView::OnMouseMove(nFlags, point);
}
void CExam3View::OnDeletePoint(WPARAM wParam,LPARAM lParam)
{
	int index=(int)lParam;
	if(index>=0&&index<m_arArray.GetSize())
	{
		m_arArray.RemoveAt(index);
		Invalidate();
	}
}

						