建议你看下孙鑫VC视频的11课
// GraphicView.h : interface of the CGraphicView class
//
/////////////////////////////////////////////////////////////////////////////
#if !defined(AFX_GRAPHICVIEW_H__A0E2AC83_7DFB_4989_9276_209F79BAEDC3__INCLUDED_)
#define AFX_GRAPHICVIEW_H__A0E2AC83_7DFB_4989_9276_209F79BAEDC3__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
class CGraphicView : public CScrollView
{
protected: // create from serialization only
CGraphicView();
DECLARE_DYNCREATE(CGraphicView)
// Attributes
public:
CGraphicDoc* GetDocument();
// Operations
public:
// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CGraphicView)
public:
virtual void OnDraw(CDC* pDC); // overridden to draw this view
virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
virtual void OnInitialUpdate();
protected:
virtual BOOL OnPreparePrinting(CPrintInfo* pInfo);
virtual void OnBeginPrinting(CDC* pDC, CPrintInfo* pInfo);
virtual void OnEndPrinting(CDC* pDC, CPrintInfo* pInfo);
//}}AFX_VIRTUAL
// Implementation
public:
virtual ~CGraphicView();
#ifdef _DEBUG
virtual void AssertValid() const;
virtual void Dump(CDumpContext& dc) const;
#endif
protected:
// Generated message map functions
protected:
//{{AFX_MSG(CGraphicView)
afx_msg void OnDot();
afx_msg void OnLine();
afx_msg void OnRectangle();
afx_msg void OnEllipse();
afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
afx_msg void OnPaint();
afx_msg void OnFileSave();
afx_msg void OnFileOpen();
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
private:
CDC m_dcCompatible;
CMetaFileDC m_dcMetaFile;
CPtrArray m_ptrArray;
CPoint m_ptOrigin;
UINT m_nDrawType;
};
#ifndef _DEBUG // debug version in GraphicView.cpp
inline CGraphicDoc* CGraphicView::GetDocument()
{ return (CGraphicDoc*)m_pDocument; }
#endif
/////////////////////////////////////////////////////////////////////////////
//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.
#endif // !defined(AFX_GRAPHICVIEW_H__A0E2AC83_7DFB_4989_9276_209F79BAEDC3__INCLUDED_)
// GraphicView.cpp : implementation of the CGraphicView class
//
#include "stdafx.h"
#include "Graphic.h"
#include "GraphicDoc.h"
#include "GraphicView.h"
#include "Graph.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CGraphicView
IMPLEMENT_DYNCREATE(CGraphicView, CScrollView)
BEGIN_MESSAGE_MAP(CGraphicView, CScrollView)
//{{AFX_MSG_MAP(CGraphicView)
ON_COMMAND(IDM_DOT, OnDot)
ON_COMMAND(IDM_LINE, OnLine)
ON_COMMAND(IDM_RECTANGLE, OnRectangle)
ON_COMMAND(IDM_ELLIPSE, OnEllipse)
ON_WM_LBUTTONDOWN()
ON_WM_LBUTTONUP()
ON_WM_PAINT()
ON_COMMAND(ID_FILE_SAVE, OnFileSave)
ON_COMMAND(ID_FILE_OPEN, OnFileOpen)
//}}AFX_MSG_MAP
// Standard printing commands
ON_COMMAND(ID_FILE_PRINT, CScrollView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_DIRECT, CScrollView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_PREVIEW, CScrollView::OnFilePrintPreview)
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CGraphicView construction/destruction
CGraphicView::CGraphicView()
{
// TODO: add construction code here
m_nDrawType=0;
m_ptOrigin=0;
m_dcMetaFile.Create();
}
CGraphicView::~CGraphicView()
{
}
BOOL CGraphicView::PreCreateWindow(CREATESTRUCT& cs)
{
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs
return CScrollView::PreCreateWindow(cs);
}
/////////////////////////////////////////////////////////////////////////////
// CGraphicView drawing
void CGraphicView::OnDraw(CDC* pDC)
{
CGraphicDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// TODO: add draw code for native data here
/* CBrush *pBrush=CBrush::FromHandle((HBRUSH)GetStockObject(NULL_BRUSH));
pDC->SelectObject(pBrush);
for(int i=0;i<m_ptrArray.GetSize();i++)
{
switch(((CGraph*)m_ptrArray.GetAt(i))->m_nDrawType)
{
case 1:
pDC->SetPixel(((CGraph*)m_ptrArray.GetAt(i))->m_ptEnd,RGB(0,0,0));
break;
case 2:
pDC->MoveTo(((CGraph*)m_ptrArray.GetAt(i))->m_ptOrigin);
pDC->LineTo(((CGraph*)m_ptrArray.GetAt(i))->m_ptEnd);
break;
case 3:
pDC->Rectangle(CRect(((CGraph*)m_ptrArray.GetAt(i))->m_ptOrigin,
((CGraph*)m_ptrArray.GetAt(i))->m_ptEnd));
break;
case 4:
pDC->Ellipse(CRect(((CGraph*)m_ptrArray.GetAt(i))->m_ptOrigin,
((CGraph*)m_ptrArray.GetAt(i))->m_ptEnd));
break;
}
}*/
/* HMETAFILE hmetaFile;
hmetaFile=m_dcMetaFile.Close();
pDC->PlayMetaFile(hmetaFile);
m_dcMetaFile.Create();
m_dcMetaFile.PlayMetaFile(hmetaFile);
DeleteMetaFile(hmetaFile);*/
CRect rect;
GetClientRect(&rect);
pDC->BitBlt(0,0,rect.Width(),rect.Height(),&m_dcCompatible,0,0,SRCCOPY);
}
/////////////////////////////////////////////////////////////////////////////
// CGraphicView printing
BOOL CGraphicView::OnPreparePrinting(CPrintInfo* pInfo)
{
// default preparation
return DoPreparePrinting(pInfo);
}
void CGraphicView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add extra initialization before printing
}
void CGraphicView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add cleanup after printing
}
/////////////////////////////////////////////////////////////////////////////
// CGraphicView diagnostics
#ifdef _DEBUG
void CGraphicView::AssertValid() const
{
CScrollView::AssertValid();
}
void CGraphicView::Dump(CDumpContext& dc) const
{
CScrollView::Dump(dc);
}
CGraphicDoc* CGraphicView::GetDocument() // non-debug version is inline
{
ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CGraphicDoc)));
return (CGraphicDoc*)m_pDocument;
}
#endif //_DEBUG
/////////////////////////////////////////////////////////////////////////////
// CGraphicView message handlers
void CGraphicView::OnDot()
{
// TODO: Add your command handler code here
m_nDrawType=1;
}
void CGraphicView::OnLine()
{
// TODO: Add your command handler code here
m_nDrawType=2;
}
void CGraphicView::OnRectangle()
{
// TODO: Add your command handler code here
m_nDrawType=3;
}
void CGraphicView::OnEllipse()
{
// TODO: Add your command handler code here
m_nDrawType=4;
}
void CGraphicView::OnLButtonDown(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
m_ptOrigin=point;
CScrollView::OnLButtonDown(nFlags, point);
}
void CGraphicView::OnLButtonUp(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
CClientDC dc(this);
CBrush *pBrush=CBrush::FromHandle((HBRUSH)GetStockObject(NULL_BRUSH));
//dc.SelectObject(pBrush);
m_dcMetaFile.SelectObject(pBrush);
if(!m_dcCompatible.m_hDC)
{
m_dcCompatible.CreateCompatibleDC(&dc);
CRect rect;
GetClientRect(&rect);
CBitmap bitmap;
bitmap.CreateCompatibleBitmap(&dc,rect.Width(),rect.Height());
m_dcCompatible.SelectObject(&bitmap);
m_dcCompatible.BitBlt(0,0,rect.Width(),rect.Height(),&dc,0,0,SRCCOPY);
m_dcCompatible.SelectObject(pBrush);
}
switch(m_nDrawType)
{
case 1:
//dc.SetPixel(point,RGB(0,0,0));
//m_dcMetaFile.SetPixel(point,RGB(0,0,0));
m_dcCompatible.SetPixel(point,RGB(0,0,0));
break;
case 2:
//dc.MoveTo(m_ptOrigin);
//dc.LineTo(point);
//m_dcMetaFile.MoveTo(m_ptOrigin);
//m_dcMetaFile.LineTo(point);
m_dcCompatible.MoveTo(m_ptOrigin);
m_dcCompatible.LineTo(point);
break;
case 3:
//dc.Rectangle(CRect(m_ptOrigin,point));
//m_dcMetaFile.Rectangle(CRect(m_ptOrigin,point));
m_dcCompatible.Rectangle(CRect(m_ptOrigin,point));
break;
case 4:
//dc.Ellipse(CRect(m_ptOrigin,point));
//m_dcMetaFile.Ellipse(CRect(m_ptOrigin,point));
m_dcCompatible.Ellipse(CRect(m_ptOrigin,point));
break;
}
//CGraph graph(m_nDrawType,m_ptOrigin,point);
//m_ptrArray.Add(&graph);
/* OnPrepareDC(&dc);
dc.DPtoLP(&m_ptOrigin);
dc.DPtoLP(&point);
CGraph *pGraph=new CGraph(m_nDrawType,m_ptOrigin,point);
m_ptrArray.Add(pGraph);*/
CScrollView::OnLButtonUp(nFlags, point);
}
void CGraphicView::OnPaint()
{
CPaintDC dc(this); // device context for painting
// TODO: Add your message handler code here
OnPrepareDC(&dc);
OnDraw(&dc);
// Do not call CScrollView::OnPaint() for painting messages
}
void CGraphicView::OnInitialUpdate()
{
CScrollView::OnInitialUpdate();
// TODO: Add your specialized code here and/or call the base class
SetScrollSizes(MM_TEXT,CSize(800,600));
}
void CGraphicView::OnFileSave()
{
// TODO: Add your command handler code here
HMETAFILE hmetaFile;
hmetaFile=m_dcMetaFile.Close();
CopyMetaFile(hmetaFile,"meta.wmf");
m_dcMetaFile.Create();
DeleteMetaFile(hmetaFile);
}
void CGraphicView::OnFileOpen()
{
// TODO: Add your command handler code here
HMETAFILE hmetaFile;
hmetaFile=GetMetaFile("meta.wmf");
m_dcMetaFile.PlayMetaFile(hmetaFile);
DeleteMetaFile(hmetaFile);
Invalidate();
}
