深入浅出 mfc Command Routing 命令传递

MFC.cpp

#include "stdafx.h"    #include "MY.h"extern CMyWinApp theApp;extern void printlpEntries(AFX_MSGMAP_ENTRY *lpEntry);BOOL   CCmdTarget::OnCmdMsg(UINT nID,int nCode){AFX_MSGMAP *pMessageMap;AFX_MSGMAP_ENTRY *lpEntry;for (pMessageMap=GetMessageMap();pMessageMap!=NULL;pMessageMap=pMessageMap->_pBaseMessageMap ){lpEntry=pMessageMap->lpEntries;printlpEntries(lpEntry);}return FALSE;} BOOL  CWinThread::InitInstance() { cout<<"CWinThread::InitInstance"<<endl; return TRUE; } int  CWinThread::Run() { cout<<"CWinThread::Run"<<endl; return 1; } BOOL  CWinApp::InitApplication() { cout<<"CWinApp::InitApplication"<<endl; return TRUE; } BOOL  CWinApp::InitInstance() { cout<<"CWinApp::InitInstance"<<endl; return TRUE; } int   CWinApp::Run() { cout<<"CWinApp::Run"<<endl; return CWinThread::Run(); } BOOL CWnd::Create() { cout<<"CWnd::Create"<<endl; return TRUE; } BOOL CWnd::CreateEx() { cout<<"CWnd::CreateEx"<<endl; PreCreateWindow(); return TRUE; } BOOL CWnd::PreCreateWindow() { cout<<"CWnd::PreCreateWindow"<<endl;   return TRUE; } LRESULT CWnd::WindowProc(UINT nMsg, WPARAM wParam, LPARAM lParam) { AFX_MSGMAP *pMessageMap; AFX_MSGMAP_ENTRY *lpEntry; if (nMsg==WM_COMMAND) { if (OnCommand(wParam,lParam)) return 1; else return (LRESULT)DefWindowProc(nMsg,wParam,lParam); } pMessageMap=GetMessageMap(); for (;pMessageMap!=NULL;pMessageMap=pMessageMap->_pBaseMessageMap) { lpEntry=pMessageMap->lpEntries; printlpEntries(lpEntry); } return 0;   } LRESULT CWnd::DefWindowProc(UINT message, WPARAM wParam, LPARAM lParam) { return TRUE; } BOOL CWnd::OnCommand(WPARAM wParam, LPARAM lParam) { return OnCmdMsg(0,0); } BOOL CFrameWnd::OnCommand(WPARAM wParam,LPARAM lParam) { return CWnd::OnCommand(wParam,lParam); } BOOL CFrameWnd::Create() { cout<<"CFrameWnd::Create"<<endl; CreateEx(); return TRUE; } BOOL CFrameWnd::PreCreateWindow() { cout<<"CFrameWnd::PreCreateWindow"<<endl; return TRUE; } CView* CFrameWnd::GetActiveView() const { return m_pViewActive; } BOOL CFrameWnd::OnCmdMsg(UINT nID,int nCode) { CView *pView=GetActiveView(); if (pView->OnCmdMsg(nID,nCode)) { return TRUE; } if (CWnd::OnCmdMsg(nID,nCode)) { return TRUE; } CWinApp * pApp=AfxGetApp(); if (pApp->OnCmdMsg(nID,nCode)) { return TRUE; } return FALSE; } BOOL CDocument::OnCmdMsg(UINT nID,int nCode) { if (CCmdTarget::OnCmdMsg(nID,nCode)) { return TRUE; } return FALSE; } BOOL CView::OnCmdMsg(UINT nID,int nCode) { if (CWnd::OnCmdMsg(nID,nCode)) { return TRUE; } BOOL bHandled=FALSE; bHandled=m_pDocument->OnCmdMsg(nID,nCode); return bHandled; } AFX_MSGMAP * CCmdTarget::GetMessageMap() const { return &CCmdTarget::messageMap; } AFX_MSGMAP CCmdTarget::messageMap= { NULL, &CCmdTarget::_messageEntries[0] }; AFX_MSGMAP_ENTRY CCmdTarget::_messageEntries[]= { {0,0,CCmdTargetid,0,AfxSig_end,0} }; BEGIN_MESSAGE_MAP(CWnd,CCmdTarget) ON_COMMAND(CWndid,0) END_MESSAGE_MAP() BEGIN_MESSAGE_MAP(CFrameWnd,CWnd) ON_COMMAND(CFrameWndid,0) END_MESSAGE_MAP() BEGIN_MESSAGE_MAP(CDocument,CCmdTarget) ON_COMMAND(CDocumentid,0) END_MESSAGE_MAP() BEGIN_MESSAGE_MAP(CView,CWnd) ON_COMMAND(CViewid,0) END_MESSAGE_MAP() BEGIN_MESSAGE_MAP(CWinApp,CWinThread) ON_COMMAND(CWinAppid,0) END_MESSAGE_MAP() CWinApp *AfxGetApp() { return theApp.m_pCurrentWinApp; } LRESULT AfxWndProc(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam,CWnd * pWnd) { return AfxCallWndProc(pWnd,hWnd,nMsg,wParam,lParam); } LRESULT AfxCallWndProc(CWnd * pWnd,HWND hWnd,UINT nMsg,WPARAM wParam,LPARAM lParam) { LRESULT lResult=pWnd->WindowProc(nMsg,wParam,lParam); return lResult; }

MFC.H

#include "stdafx.h"#define TRUE  1#define FALSE 0typedef char* LPSTR;typedef const char* LPCSTR;typedef unsigned long DWORD;typedef int BOOL;typedef unsigned short WORD;typedef int INT;typedef unsigned int UINT;typedef long LONG;typedef UINT   WPARAM;typedef LONG  LPARAM;typedef LONG   LRESULT;typedef int    HWND;#define  WM_COMMAND 0x0111#define  WM_CREATE  0x0001#define  WM_PAINT   0x000F#define  WM_NOTIFY  0x004E#define  CObjectid  0xffff#define    CCmdTargetid 1#define      CWinThreadid 11#define       CWinAppid    111#define         CMyWinAppid  1111#define    CWndid           12#define        CFrameWndid  121#define          CMyFrameWndid 1211#define        CViewid       122#define           CMyViewid  1221#define        CDocumentid   13#define          CMyDocid    131struct  AFX_MSGMAP_ENTRY;struct  AFX_MSGMAP{AFX_MSGMAP       *  _pBaseMessageMap;AFX_MSGMAP_ENTRY *  lpEntries;};//#define  DECLARE_MESSAGE_MAP()\//static  AFX_MSGMAP_ENTRY _messageEntries[];\//static  AFX_MSGMAP   messageMap;\//virtual  AFX_MSGMAP *GetMessageMap() const;//////#define BEGIN_MESSAG_MAP(theClass,baseClass) \//AFX_MSGMAP *theClass::GetMessageMap() const \//    {return &theClass::messageMap;}             \//AFX_MSGMAP theClass::messageMap={&(baseClass::messageMap),(AFX_MSGMAP_ENTRY *)&(theClass::_messageEntries)};\//AFX_MSGMAP_ENTRY theClass::_messageEntries[]={ #define  DECLARE_MESSAGE_MAP()\static AFX_MSGMAP_ENTRY _messageEntries[];\static AFX_MSGMAP messageMap;\virtual AFX_MSGMAP * GetMessageMap() const;#define  BEGIN_MESSAGE_MAP(theClass,baseClass1)\AFX_MSGMAP* theClass::GetMessageMap() const\{ return &theClass::messageMap;}\AFX_MSGMAP theClass::messageMap={ &(baseClass1::messageMap),(AFX_MSGMAP_ENTRY*)&(theClass::_messageEntries)};\AFX_MSGMAP_ENTRY theClass::_messageEntries[]={#define  END_MESSAGE_MAP()\{ 0,0,0,0,AfxSig_end,(AFX_PMSG)0}   }; typedef void (*AFX_PMSG)();struct AFX_MSGMAP_ENTRY{UINT nMessgae;UINT nCode;UINT nID;UINT nLastID;UINT nSig;AFX_PMSG  pfn;};#include "afxmsg_.h"class CObject{};class CCmdTarget:public CObject{   public:   virtual BOOL  OnCmdMsg(UINT nID,int nCode);   DECLARE_MESSAGE_MAP()};class CWinThread:public CCmdTarget{   public:   virtual BOOL  InitInstance();   virtual  int  Run();};class CWnd;class CWinApp:public CWinThread{public:CWinApp *  m_pCurrentWinApp;CWnd    *  m_pMainWnd;virtual  BOOL  InitApplication();virtual  BOOL  InitInstance();virtual  int   Run();DECLARE_MESSAGE_MAP() };class CDocument:public CCmdTarget{  public:  virtual BOOL OnCmdMsg(UINT nID,int nCode);  DECLARE_MESSAGE_MAP()};class CWnd:public CCmdTarget{public:virtual  BOOL  Create(); BOOL CreateEx();virtual  BOOL PreCreateWindow();virtual  LRESULT WindowProc(UINT nMsg,WPARAM wParam,LPARAM lParam);virtual  LRESULT DefWindowProc(UINT message,WPARAM wParam,LPARAM lParam);virtual  BOOL OnCommand(WPARAM wParam,LPARAM lParam);DECLARE_MESSAGE_MAP()};class CView;class  CFrameWnd:public CWnd{   public:   CView *m_pViewActive;   BOOL Create();   CView * GetActiveView() const;   virtual  BOOL  PreCreateWindow();   virtual  BOOL  OnCommand(WPARAM wParam,LPARAM lParam);   virtual  BOOL  OnCmdMsg(UINT nID,int nCode);   DECLARE_MESSAGE_MAP()   friend CView;};class CView:public CWnd{public:CDocument *m_pDocument;virtual BOOL  OnCmdMsg(UINT nID,int nCode);DECLARE_MESSAGE_MAP()friend  CFrameWnd;};CWinApp *AfxGetApp();LRESULT AfxWndProc(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam,CWnd *pWnd);LRESULT AfxCallWndProc(CWnd *pWnd,HWND hWnd,UINT nMsg,WPARAM wParam,LPARAM lParam);

MY.H

#include "stdafx.h"#include "MFC.h"#include "afxmsg_.h"class CMyWinApp:public CWinApp{  public:  CMyWinApp();  virtual BOOL InitInstance();  DECLARE_MESSAGE_MAP()};class CMyFrameWnd:public CFrameWnd{  public:CMyFrameWnd();DECLARE_MESSAGE_MAP()};class CMyDoc:public CDocument{  public:DECLARE_MESSAGE_MAP()};class CMyView:public CView{public:DECLARE_MESSAGE_MAP()};

MY.CPP

#include "stdafx.h"#include "MY.h" CMyWinApp theApp;CMyWinApp::CMyWinApp(){m_pCurrentWinApp=this;}BOOL CMyWinApp::InitInstance() { cout<<"CMyWinApp::InitInstance"<<endl; m_pMainWnd=new CMyFrameWnd;  return TRUE; } CMyFrameWnd::CMyFrameWnd() {  Create(); } BEGIN_MESSAGE_MAP(CMyWinApp,CWinApp)    ON_COMMAND(CMyWinAppid,0) END_MESSAGE_MAP()  BEGIN_MESSAGE_MAP(CMyFrameWnd,CFrameWnd) ON_COMMAND(CMyFrameWndid,0) END_MESSAGE_MAP() BEGIN_MESSAGE_MAP(CMyDoc,CDocument) ON_COMMAND(CMyDocid,0) END_MESSAGE_MAP() BEGIN_MESSAGE_MAP(CMyView,CView) ON_COMMAND(CMyViewid,0) END_MESSAGE_MAP() void printlpEntries(AFX_MSGMAP_ENTRY *lpEntry) { struct  { int classid; char * classname; }classinfo[]= { CCmdTargetid,"CCmdTarget", CWinThreadid,"CWinThread", CWinAppid,"CWinApp",   CMyWinAppid,"CMyWinApp",   CWndid,"CWnd",     CFrameWndid,"CFrameWnd",   CMyFrameWndid,"CMyFrameWnd",   CViewid,"CView",    CMyViewid,"CMyView", CDocumentid,"CDocument",    CMyDocid,"CMyDoc", 0,"  " }; for (int i=0;classinfo[i].classid!=0;i++) { if (classinfo[i].classid==lpEntry->nID) { cout<<lpEntry->nID<" "; cout<<classinfo[i].classname<<endl; break; } }  }

afxmsg_.h

#pragma onceenum AfxSig{AfxSig_end=0,AfxSig_vv,};#define  ON_COMMAND(id,memberFxn)   \{WM_COMMAND,0,(DWORD)id,(DWORD)id,AfxSig_vv,(AFX_PMSG)memberFxn},

Main.cpp

// Frame8.cpp : 定义控制台应用程序的入口点。//#include "stdafx.h"#include "MY.h"int _tmain(int argc, _TCHAR* argv[]){CWinApp *pApp=AfxGetApp();pApp->InitApplication();pApp->InitInstance();pApp->Run();CMyDoc *pMyDoc=new CMyDoc;CMyView *pMyView=new CMyView;CFrameWnd *pMyFrame=(CFrameWnd *)pApp->m_pMainWnd;pMyFrame->m_pViewActive=pMyView;pMyView->m_pDocument=pMyDoc;cout<<endl<<" pMyFrame received a WM_CREATE ,routing path:  "<<endl;AfxWndProc(0,WM_CREATE,0,0,pMyFrame);cout<<endl<<" pMyView received a WM_PAINT ,routing path:  "<<endl;AfxWndProc(0,WM_PAINT,0,0,pMyView);cout<<endl<<" pMyView received a WM_COMMAND ,routing path:  "<<endl;AfxWndProc(0,WM_COMMAND,0,0,pMyView);cout<<endl<<" pMyFrame received a WM_COMMAND ,routing path:  "<<endl;AfxWndProc(0,WM_COMMAND,0,0,pMyFrame);system("pause");return 0;}