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    // PaintDcDemoView.cpp : implementation of the CPaintDcDemoView class
    //
    
    #include "stdafx.h"
    #include "PaintDcDemo.h"
    
    #include "PaintDcDemoDoc.h"
    #include "PaintDcDemoView.h"
    
    #ifdef _DEBUG
    #define new DEBUG_NEW
    #undef THIS_FILE
    static char THIS_FILE[] = __FILE__;
    #endif
    
    /////////////////////////////////////////////////////////////////////////////
    // CPaintDcDemoView
    
    IMPLEMENT_DYNCREATE(CPaintDcDemoView, CView)
    
    BEGIN_MESSAGE_MAP(CPaintDcDemoView, CView)
     //{{AFX_MSG_MAP(CPaintDcDemoView)
     ON_WM_PAINT()
     //}}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()
    
    /////////////////////////////////////////////////////////////////////////////
    // CPaintDcDemoView construction/destruction
    
    CPaintDcDemoView::CPaintDcDemoView()
    {
     // TODO: add construction code here
    
    }
    
    CPaintDcDemoView::~CPaintDcDemoView()
    {
    }
    
    BOOL CPaintDcDemoView::PreCreateWindow(CREATESTRUCT& cs)
    {
     // TODO: Modify the Window class or styles here by modifying
     //  the CREATESTRUCT cs
    
     return CView::PreCreateWindow(cs);
    }
    
    /////////////////////////////////////////////////////////////////////////////
    // CPaintDcDemoView drawing
    
    void CPaintDcDemoView::OnDraw(CDC* pDC)
    {
     CPaintDcDemoDoc* pDoc = GetDocument();
     ASSERT_VALID(pDoc);
     // TODO: add draw code for native data here
    }
    
    /////////////////////////////////////////////////////////////////////////////
    // CPaintDcDemoView printing
    
    BOOL CPaintDcDemoView::OnPreparePrinting(CPrintInfo* pInfo)
    {
     // default preparation
     return DoPreparePrinting(pInfo);
    }
    
    void CPaintDcDemoView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
    {
     // TODO: add extra initialization before printing
    }
    
    void CPaintDcDemoView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
    {
     // TODO: add cleanup after printing
    }
    
    /////////////////////////////////////////////////////////////////////////////
    // CPaintDcDemoView diagnostics
    
    #ifdef _DEBUG
    void CPaintDcDemoView::AssertValid() const
    {
     CView::AssertValid();
    }
    
    void CPaintDcDemoView::Dump(CDumpContext& dc) const
    {
     CView::Dump(dc);
    }
    
    CPaintDcDemoDoc* CPaintDcDemoView::GetDocument() // non-debug version is inline
    {
     ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CPaintDcDemoDoc)));
     return (CPaintDcDemoDoc*)m_pDocument;
    }
    #endif //_DEBUG
    
    /////////////////////////////////////////////////////////////////////////////
    // CPaintDcDemoView message handlers
    
    void CPaintDcDemoView::OnPaint() 
    {
     CPaintDC dc(this); // device context for painting
     dc.TextOut(5,5,"在客户窗口的正中间绘制矩形，大小为窗口的1/4");
     CRect rect; //创建矩形区域，存储客户窗口区域
     GetClientRect(&rect); //得到客户区的范围放到rect中
     //在客户窗口的正中间绘制矩形，大小为窗口的1/4
     dc.Rectangle(rect.Width()/4,rect.Height()/4,3*rect.Width()/4,3*rect.Height()/4); 
     // Do not call CView::OnPaint() for painting messages
    }