implement_dyncreate使用c预言实现jpeg 图像格式的读取与写入

类重复定义了vc98mfcincludeafxwin.h(3703) : error C2011: 'CScrollView' : 'class' type redefinitio

afxwin.h 应当含在 StdAfx.h 里，不要在别处另外定义。

CxxxView.cpp 里 #include "stdafx.h" 放在第一个。

CxxxView.cpp 里 用到 CScrollView 例如： IMPLEMENT_DYNCREATE(CXxxView, CScrollView) BEGIN_MESSAGE_MAP(CXxxView, CScrollView) ON_COMMAND(ID_FILE_PRINT, CScrollView::OnFilePrint) ... END_MESSAGE_MAP()

MFC实现和windows画图工具

我只会写简单的操作，给你做个参考吧 // DrawView.cpp : implementation of the CDrawView class // #include "stdafx.h" #include "Draw.h" #include "DrawDoc.h" #include "DrawView.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CDrawView IMPLEMENT_DYNCREATE(CDrawView, CView) BEGIN_MESSAGE_MAP(CDrawView, CView) //{{AFX_MSG_MAP(CDrawView) ON_WM_CREATE() ON_COMMAND(ID_DRAW_LINECOLOR, OnDrawLinecolor) ON_COMMAND(ID_DRAW_FILLCOLOR, OnDrawFillcolor) ON_WM_LBUTTONUP() ON_WM_MOUSEMOVE() ON_WM_LBUTTONDOWN() ON_WM_SETCURSOR() //}}AFX_MSG_MAP ON_COMMAND_RANGE(ID_DRAW_LINE,ID_DRAW_FILL, OnSelectDrawType) ON_UPDATE_COMMAND_UI_RANGE(ID_DRAW_LINE,ID_DRAW_FILL, OnUpdateSelectDrawType) ON_COMMAND_RANGE(ID_DRAW_LINEWIDTH_ONE,ID_DRAW_LINEWIDTH_FIVE, OnDrawLineWidth) ON_UPDATE_COMMAND_UI_RANGE(ID_DRAW_LINEWIDTH_ONE,ID_DRAW_LINEWIDTH_FIVE,OnUpdateDrawLineWidth) // Standard mands 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() ///////////////////////////////////////////////////////////////////////////// // CDrawView construction/destruction CDrawView::CDrawView() { // TODO: add construction code here m_pMemDC = new CDC; m_pBitmap = new CBitmap; m_nDrawType = -1; m_nLineWidth = 1; m_cLineColor = RGB(0,0,0); m_cFillColor = RGB(0,0,255); m_bDrawing = false; } CDrawView::~CDrawView() { delete m_pMemDC; delete m_pBitmap; } BOOL CDrawView::PreCreateWindow(CREATESTRUCT& cs) { // TODO: Modify the Window class or styles here by modifying // the CREATESTRUCT cs return CView::PreCreateWindow(cs); } ///////////////////////////////////////////////////////////////////////////// // CDrawView drawing void CDrawView::OnDraw(CDC* pDC) { CDrawDoc* pDoc = GetDocument(); ASSERT_VALID(pDoc); // TODO: add draw code for native data here CBitmap * pOldBitmap = m_pMemDC->SelectObject(m_pBitmap); pDC->BitBlt(0,0,m_nMaxX, m_nMaxY, m_pMemDC, 0,0, SRCCOPY); m_pMemDC->SelectObject(pOldBitmap); } ///////////////////////////////////////////////////////////////////////////// // CDrawView printing BOOL CDrawView::OnPreparePrinting(CPrintInfo* pInfo) { // default preparation return DoPreparePrinting(pInfo); } void CDrawView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add extra initialization before printing } void CDrawView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add cleanup after printing } ///////////////////////////////////////////////////////////////////////////// // CDrawView diagnostics #ifdef _DEBUG void CDrawView::AssertValid() const { CView::AssertValid(); } void CDrawView::Dump(CDumpContext& dc) const { CView::Dump(dc); } CDrawDoc* CDrawView::GetDocument() // non-debug version is inline { ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CDrawDoc))); return (CDrawDoc*)m_pDocument; } #endif //_DEBUG ///////////////////////////////////////////////////////////////////////////// // CDrawView message handlers int CDrawView::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (CView::OnCreate(lpCreateStruct) == -1) return -1; // TODO: Add your specialized creation code here m_nMaxX = GetSystemMetrics(SM_CXSCREEN); m_nMaxY = GetSystemMetrics(SM_CYSCREEN); CDC * pDC = GetDC(); m_pMemDC->CreateCompatibleDC(pDC); m_pBitmap->CreateCompatibleBitmap(pDC, m_nMaxX, m_nMaxY); CBitmap * pOldBitmap = m_pMemDC->SelectObject(m_pBitmap); CBrush brush; brush.CreateStockObject(WHITE_BRUSH); CRect rect(-1,-1,m_nMaxX, m_nMaxY); m_pMemDC->FillRect(rect,&brush); m_pMemDC->SelectObject(pOldBitmap); ReleaseDC(pDC); return 0; } void CDrawView::OnSelectDrawType(UINT nID) { m_nDrawType = nID - ID_DRAW_LINE; } void CDrawView::OnUpdateSelectDrawType(CCmdUI * pCmdUI) { int nID = pCmdUI->m_nID - ID_DRAW_LINE; if(nID == m_nDrawType) pCmdUI->SetCheck(true); else pCmdUI->SetCheck(false); } void CDrawView::OnDrawLineWidth(UINT nID) { m_nLineWidth = nID - ID_DRAW_LINEWIDTH_ONE + 1; } void CDrawView::OnUpdateDrawLineWidth(CCmdUI * pCmdUI) { int nID = pCmdUI->m_nID - ID_DRAW_LINEWIDTH_ONE + 1; if(nID == m_nLineWidth) pCmdUI->SetCheck(true); else pCmdUI->SetCheck(false); } void CDrawView::OnDrawLinecolor() { // TODO: Add mand handler code here CColorDialog dlg; .Flags |= CC_PREVENTFULLOPEN | CC_RGBINIT; .rgbResult = m_cLineColor; if(dlg.DoModal() == IDOK) { m_cLineColor = dlg.GetColor(); } } void CDrawView::OnDrawFillcolor() { // TODO: Add mand handler code here CColorDialog dlg; .Flags |= CC_PREVENTFULLOPEN | CC_RGBINIT; .rgbResult = m_cFillColor; if(dlg.DoModal() == IDOK) { m_cFillColor = dlg.GetColor(); } } void CDrawView::OnLButtonDown(UINT nFlags, CPoint point) { // TODO: Add your message handler code here and/or call default SetCapture(); m_bDrawing = true; m_ptStart = point; m_ptOld = point; if(m_nDrawType == 3) { CBrush * pOldBrush; CBitmap * pOldBitmap; CBrush brFill; brFill.CreateSolidBrush(m_cFillColor); pOldBrush = m_pMemDC->SelectObject(&brFill); pOldBitmap = m_pMemDC->SelectObject(m_pBitmap); m_pMemDC->ExtFloodFill(point.x,point.y, m_pMemDC->GetPixel(point), FLOODFILLSURFACE); Invalidate(false); m_pMemDC->SelectObject(pOldBrush); m_pMemDC->SelectObject(pOldBitmap); m_bDrawing = false; } CView::OnLButtonDown(nFlags, point); } void CDrawView::OnMouseMove(UINT nFlags, CPoint point) { // TODO: Add your message handler code here and/or call default if(m_bDrawing) { CDC * pDC = GetDC(); CBitmap * pOldBitmap = m_pMemDC->SelectObject(m_pBitmap); CPen pen; pen.CreatePen(PS_SOLID, m_nLineWidth, m_cLineColor); CPen * pOldPen = pDC->SelectObject(&pen); CBrush * pOldBrush = (CBrush *) pDC->SelectStockObject(NULL_BRUSH); CRect rectOld(m_ptStart, m_ptOld); rectOld.NormalizeRect(); rectOld.InflateRect(m_nLineWidth, m_nLineWidth); pDC->BitBlt(rectOld.left, , rectOld.Width(), rectOld.Height(),m_pMemDC, rectOld.left, , SRCCOPY); CRect rectNew(m_ptStart,point); switch(m_nDrawType) { case 0: pDC->MoveTo(m_ptStart); pDC->LineTo(point); break; case 1: pDC->Rectangle(rectNew); break; case 2: pDC->Ellipse(rectNew); break; default: break; } m_pMemDC->SelectObject(pOldBitmap); pDC->SelectObject(pOldPen); pDC->SelectObject(pOldBrush); ReleaseDC(pDC); m_ptOld = point; } CView::OnMouseMove(nFlags, point); } void CDrawView::OnLButtonUp(UINT nFlags, CPoint point) { // TODO: Add your message handler code here and/or call default if(m_bDrawing) { m_bDrawing = false; CBitmap * pOldBitmap = m_pMemDC->SelectObject(m_pBitmap); CPen pen; pen.CreatePen(PS_SOLID, m_nLineWidth, m_cLineColor); CPen * pOldPen = m_pMemDC->SelectObject(&pen); CBrush * pOldBrush = (CBrush *) m_pMemDC->SelectStockObject(NULL_BRUSH); CRect rectNew(m_ptStart,point); switch(m_nDrawType) { case 0: m_pMemDC->MoveTo(m_ptStart); m_pMemDC->LineTo(point); break; case 1: m_pMemDC->Rectangle(rectNew); break; case 2: m_pMemDC->Ellipse(rectNew); break; default: break; } Invalidate(false); m_pMemDC->SelectObject(pOldBitmap); m_pMemDC->SelectObject(pOldPen); m_pMemDC->SelectObject(pOldBrush); } ReleaseCapture(); CView::OnLButtonUp(nFlags, point); } BOOL CDrawView::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message) { // TODO: Add your message handler code here and/or call default switch(m_nDrawType) { case 0: case 1: case 2: ::SetCursor(AfxGetApp()->LoadStandardCursor(IDC_CROSS)); break; case 3: ::SetCursor(AfxGetApp()->LoadCursor(ID_CURSOR_FILL)); break; default: ::SetCursor(AfxGetApp()->LoadStandardCursor(IDC_ARROW)); break; } return CView::OnSetCursor(pWnd, nHitTest, message); } 好久以前的了，要的话留下邮箱，我发给你~ 我可以帮助你，你先设置我最佳答案后，我百度Hii教你。

IMPLEMENT_RUNTIMECLASS

这些参数都是宏参数，他们都是为了去定义一个类型为CRuntimeClass的叫class##class_name的静态结构体实例，而这个静态的结构体实例是在DELCARE_DYNACREATE中被声明的。

而该结构体类型是这样的： struct CRuntimeClass { LPCSTR m_lpszClassName; int m_ClassSize； UINT mWSchema； CObject *（PASCAL *m_lpfunCreateObject)(); CRuntimeClass *m_pBaseClass; CObject *CreateObject(); static CRuntimeClass * PASCAL Load(); static CRuntimeClass *pFirstClass(); CRuntimeClass *m_pNextClass(); }; 而在_IMPLEMENT_RUNTIMECLASS中class_name中其被用作char _lpsz##class_name[]=#class_name; 而_lpsz##class_name用于对CRuntimeClass中的m_lpszClassName进行赋值。

用途：一般用于动态创建中字符串的比对。

base_class_name其用作RUNTIME_ClASS(base_class_name)对CRuntimeClass中的m_pBaseClass进行赋值。

用途：一般用于获取父类的静态CRuntimeClass变量:class##base_class_name; OxFFFF其用于对CRuntimeClass中的m_WSChema进行赋值。

用途：用于文档版本号。

在序列化中有用，在动态创建中可以不管它，就这么写就可以。

class_name::CreateObject是一个函数指针，该函数就是你自己都在问题中写了一遍，其对CRuntimeClass中的m_pfunCreateObject进行赋值。

用途：你自己也写了，用于在heap内存中创建new一个该类的对象，是最终目的。

MFC是如何创建窗口的？

CSingleDocTemplate* pDocTemplate; pDocTemplate = new CSingleDocTemplate( IDR_MAINFRAME, RUNTIME_CLASS(CFSDDoc), RUNTIME_CLASS(CMainFrame), // main SDI frame window RUNTIME_CLASS(CFSDView)); AddDocTemplate(pDocTemplate); // mand line for standard mands, DDE, file open CCommandLineInfo cmdInfo; ParseCommandLine(cmdInfo); // mands specified on mand line if (!ProcessShellCommand(cmdInfo)) return FALSE; // The one and only window has been initialized, so show and update it. m_pMainWnd->ShowWindow(SW_SHOW); m_pMainWnd->UpdateWindow(); return TRUE; 真正建立窗口的是ProcessShellCommand(cmdInfo)函数调用。

。

可以一步步跟踪。

使用c预言实现jpeg 图像格式的读取与写入

// 00Doc.cpp : implementation of the CMy00Doc class //#include "stdafx.h" #include "00.h"#include "00Doc.h"#ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif///////////////////////////////////////////////////////////////////////////// // CMy00DocIMPLEMENT_DYNCREATE(CMy00Doc, CDocument)BEGIN_MESSAGE_MAP(CMy00Doc, CDocument) //{{AFX_MSG_MAP(CMy00Doc)<br> // NOTE - the ClassWizard will add and remove mapping macros here.<br> // DO NOT EDIT what you see in these blocks of generated code!<br> //}}AFX_MSG_MAP END_MESSAGE_MAP()///////////////////////////////////////////////////////////////////////////// // CMy00Doc construction/destructionCMy00Doc::CMy00Doc() { // TODO: add one-time construction code here m_pImage = new CImageX;}CMy00Doc::~CMy00Doc() { delete m_pImage; }BOOL CMy00Doc::OnNewDocument() { if (!CDocument::OnNewDocument()) return FALSE; // TODO: add reinitialization code here // (SDI documents will reuse this document) return TRUE; } ///////////////////////////////////////////////////////////////////////////// // CMy00Doc serializationvoid CMy00Doc::Serialize(CArchive& ar) { if (ar.IsStoring()) { // TODO: add storing code here } else { // TODO: add loading code here } }///////////////////////////////////////////////////////////////////////////// // CMy00Doc diagnostics#ifdef _DEBUG void CMy00Doc::AssertValid() const { CDocument::AssertValid(); }void CMy00Doc::Dump(CDumpContext& dc) const { CDocument::Dump(dc); } #endif //_DEBUG///////////////////////////////////////////////////////////////////////////// // mands BOOL CMy00Doc::OnOpenDocument(LPCTSTR lpszPathName) { if (!CDocument::OnOpenDocument(lpszPathName)) return FALSE; // TODO: Add your specialized creation code here m_strFileName = lpszPathName;//ZWS 20040317 return m_pImage->Load( CString(lpszPathName) ); // return TRUE; }BOOL CMy00Doc::OnSaveDocument(LPCTSTR lpszPathName) { // TODO: Add your specialized code here and/or call the base class return m_pImage->Save( CString(lpszPathName) ); // return CDocument::OnSaveDocument(lpszPathName); }