mfc第三天
浏览数：165 /
时间：2015年06月08日
消息映射机制
1)必须继承自CCmdTarget
2)类中药添加声明宏 DECLARE_MESSAGE_MAP()
3)类外添加实现宏
BEGIN_MESSAGE_MAP(theClass,baseClass)////本类，基类
ON_MESSAGE(msg,functionname)
END_MESSAGE_MAP()
3宏展开各部分的作用
_messageEntries[]--静态数组
保存了消息ID和处理这个消息的函数的对应关系
messageMap-静态变量
1- 保存父类的静态变量地址
2- 保存本类的静态数组首地址
GetMessageMap---虚函数
获取本类静态变量地址(链表的头结点)
4关系
GetMessageMap()
|->CMyFrameWnd::_messageEntries[]
|->消息ID.....处理函数地址
...................................... //不论写不写消息宏,父类..的消息链表都存在
|->CFrameWnd::messageMap //加宏实为加节点
|->CFrameWnd::_messageEntries[]
|->消息ID...处理函数地址
....................................
|->CWnd::messageMap
|->CWnd::_messageEntries[]
|->消息ID....处理函数地址
|->CCmdTarget::messageMap
|->CCmdTarget::_messageEntries[]
|->消息ID...处理函数地址
|->NULL
5消息处理过程
1)利用GetMessageMap函数获取本类静态变量地址(链表头结点)pMessageMap
2)利用pMessageMap头结点的第二个语速获取对应静态数组，然后在数组中
查找对应消息函数地址的地址,如果找到执行3,未找到则执行4
3)使用找到的数组元素的最后一个成员(成员函数的地址),并调用这个函数完成消息处理
4)利用pMessageMap的第一个元素获取父类的静态变量地址，并重新给pMessageMap赋值为
父类的静态变量地址执行2
5)遍历整个链表都未找到则调用DefWindowProc给消息做默认处理.
二MFC消息分类
1)标准消息
ON_WM_XXX
2)命令消息(WM_COMMAND) //菜单 加速键 通知消息
ON_COMMAND(命令ID,处理函数)
ON_COMMAND_RANGE(起始ID,终止ID,处理函数) //往数组中扔通知消息
//从起始ID到终止ID都由这个函数处理
3)自定义消息
#define WM_MYMESSAGE WM_USER+n WM_USER==0x400 n<=
没有专门处理自定义消息的宏 由通用消息宏处理
ON_MESSAGE(消息ID,处理函数)
4)通知消息
ON_EN_CHANGE //EN---EDIT_NOTIFY
WM_COMMAND WM_NOTIFY 消息另行处理
**********************************************************************
封装好的消息映射宏 标准消息
ON_WM_CREATE()
#define ON_WM_CREATE() \
{ WM_CREATE, 0, 0, 0, AfxSig_is, \ //AfxSig_is--->int
(AFX_PMSG)(AFX_PMSGW)(int (AFX_MSG_CALL CWnd::*)(LPCREATESTRUCT))&OnCreate },
ON_WM_CREATE( ) afx_msg int OnCreate( LPCREATESTRUCT ); //afx_msg 占位符 提高可读性
控件通知消息
#define ON_COMMAND(id, memberFxn) \
{ WM_COMMAND, CN_COMMAND, (WORD)id, (WORD)id, AfxSig_vv, (AFX_PMSG)&memberFxn },
CN_COMMAND通知码 都是0
afx_msg void memberFxn( ); //MSDN声明
#define CN_COMMAND 0 // void ()
#define CN_UPDATE_COMMAND_UI ((UINT)(-1)) // void (CCmdUI*)
#define CN_EVENT ((UINT)(-2)) // OLE event
#define CN_OLECOMMAND ((UINT)(-3)) // OLE document command
#define CN_OLE_UNREGISTER ((UINT)(-4)) // OLE unregister
#define ON_COMMAND_RANGE(id, idLast, memberFxn) \ //不建议使用,if else switch case
{ WM_COMMAND, CN_COMMAND, (WORD)id, (WORD)idLast, AfxSig_vw, \ //容易扰乱程序结构,降低可读性
(AFX_PMSG)(void (AFX_MSG_CALL CCmdTarget::*)(UINT))&memberFxn },
MSDN中的例子
// The code fragment below shows how to use ON_COMMAND_RANGE macro
// to map a contiguous range of command IDs to a single message
// handler function (i.e. OnFileMenuItems() is the sample below). In
// addition, it also shows how to use CheckMenuRadioItem() to check a
// selected menu item and makes it a radio item.
BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
//{{AFX_MSG_MAP(CMainFrame)
// ...
//}}AFX_MSG_MAP
ON_COMMAND_RANGE(ID_FILE_MENUITEM1, ID_FILE_MENUITEM3, OnFileMenuItems)
END_MESSAGE_MAP()
void CMainFrame::OnFileMenuItems(UINT nID)
{
CMenu* mmenu = GetMenu();
CMenu* submenu = mmenu->GetSubMenu(0);
submenu->CheckMenuRadioItem(ID_FILE_MENUITEM1, ID_FILE_MENUITEM3,
nID, MF_BYCOMMAND);
}
#define ON_MESSAGE(message, memberFxn) \
{ message, 0, 0, 0, AfxSig_lwl, \
(AFX_PMSG)(AFX_PMSGW)(LRESULT (AFX_MSG_CALL CWnd::*)(WPARAM, LPARAM))&memberFxn },
// Edit Control Notification Codes
#define ON_EN_SETFOCUS(id, memberFxn) \
ON_CONTROL(EN_SETFOCUS, id, memberFxn)
#define O
**********************************************************************
伪代码
以WM_CREATE消息为例
AfxWndProc(....){
CWnd* pWnd = CWnd::FromHandlePermanent(hWnd);
//获取和窗口句柄绑定在一起的框架类对象地址(pFrame)
ASSERT(pWnd != NULL);
ASSERT(pWnd->m_hWnd == hWnd);
if (pWnd == NULL || pWnd->m_hWnd != hWnd)
return ::DefWindowProc(hWnd, nMsg, wParam, lParam);
&&& return AfxCallWndProc(pWnd, hWnd, nMsg, wParam, lParam);
}
return AfxCallWndProc(pWnd, hWnd, nMsg, wParam, lParam); //pWnd==pFrame
lResult = pWnd->WindowProc(nMsg, wParam, lParam); //pWnd==pFrame
LRESULT CWnd::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
{
OnWndMsg(message, wParam, lParam, &lResult){
const AFX_MSGMAP* pMessageMap; pMessageMap = GetMessageMap();{
//进入宏展开 返回链表头结点地址(本类静态变量)
return &CMyFrameWnd::messageMap;
}
const AFX_MSGMAP_ENTRY* lpEntry;
for (; pMessageMap != NULL;
pMessageMap = pMessageMap->pBaseMap)//遍历链表
(lpEntry = AfxFindMessageEntry(pMessageMap->lpEntries,
message, 0, 0)) != NULL)
///用WM_CREATE匹配消息链表,找到处理函数(查找本类静态数组)
///如果没找到则去父类找，找到返回匹配到的数组元素的地址
///没找到则默认处理
if(lpEntry!=NULL){
goto LDispatch; //跳出for循环
一旦找到跳出for循环,不在变量链表
}
LDispatch:
union MessageMapFunctions mmf; //lpEntry为消息数组中WM_CREATE的地址
mmf.pfn = lpEntry->pfn; //pfn=CMyFrameWnd::OnCreate
//pfn结构体最后一个成员
int nSig; //
nSig = lpEntry->nSig; //
switch(nSig){ //联合体有多少成员就有多少种情况
......
case AfxSig_lwl:
lResult = (this->*mmf.pfn_lwl)(wParam, lParam);
break;
......
此时mmf.pfn_lwl=&OnCreate 因为其类型为联合体,先前赋值为&OnCreate而后未覆盖.所有成员公用此值
}
}
}
**********************************************************************
LRESULT CWnd::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
{
// OnWndMsg does most of the work, except for DefWindowProc call
LRESULT lResult = 0;
//this=pFrame
if (!OnWndMsg(message, wParam, lParam, &lResult)) ----------->
lResult = DefWindowProc(message, wParam, lParam);
return lResult;
}
**********************************************************************
CWnd* PASCAL CWnd::FromHandlePermanent(HWND hWnd)
{
CHandleMap* pMap = afxMapHWND();
CWnd* pWnd = NULL;
if (pMap != NULL)
{
// only look in the permanent map - does no allocations
pWnd = (CWnd*)pMap->LookupPermanent(hWnd);
ASSERT(pWnd == NULL || pWnd->m_hWnd == hWnd);
}
return pWnd;
}
**********************************************************************
CHandleMap* PASCAL afxMapHWND(BOOL bCreate)
{
AFX_MODULE_THREAD_STATE* pState = AfxGetModuleThreadState();
if (pState->m_pmapHWND == NULL && bCreate)
{
BOOL bEnable = AfxEnableMemoryTracking(FALSE);
#ifndef _AFX_PORTABLE
_PNH pnhOldHandler = AfxSetNewHandler(&AfxCriticalNewHandler);
#endif
pState->m_pmapHWND = new CHandleMap(RUNTIME_CLASS(CTempWnd),
offsetof(CWnd, m_hWnd));
#ifndef _AFX_PORTABLE
AfxSetNewHandler(pnhOldHandler);
#endif
AfxEnableMemoryTracking(bEnable);
}
return pState->m_pmapHWND;
}
**********************************************************************
inline CObject* CHandleMap::LookupPermanent(HANDLE h)
{ return (CObject*)m_permanentMap.GetValueAt((LPVOID)h); }
**********************************************************************
**********************************************************************
union MessageMapFunctions
{
AFX_PMSG pfn; // generic member function pointer
// specific type safe variants for WM_COMMAND and WM_NOTIFY messages
void (AFX_MSG_CALL CCmdTarget::*pfn_COMMAND)();
BOOL (AFX_MSG_CALL CCmdTarget::*pfn_bCOMMAND)();
void (AFX_MSG_CALL CCmdTarget::*pfn_COMMAND_RANGE)(UINT);
BOOL (AFX_MSG_CALL CCmdTarget::*pfn_COMMAND_EX)(UINT);
void (AFX_MSG_CALL CCmdTarget::*pfn_UPDATE_COMMAND_UI)(CCmdUI*);
void (AFX_MSG_CALL CCmdTarget::*pfn_UPDATE_COMMAND_UI_RANGE)(CCmdUI*, UINT);
void (AFX_MSG_CALL CCmdTarget::*pfn_OTHER)(void*);
BOOL (AFX_MSG_CALL CCmdTarget::*pfn_OTHER_EX)(void*);
void (AFX_MSG_CALL CCmdTarget::*pfn_NOTIFY)(NMHDR*, LRESULT*);
BOOL (AFX_MSG_CALL CCmdTarget::*pfn_bNOTIFY)(NMHDR*, LRESULT*);
void (AFX_MSG_CALL CCmdTarget::*pfn_NOTIFY_RANGE)(UINT, NMHDR*, LRESULT*);
BOOL (AFX_MSG_CALL CCmdTarget::*pfn_NOTIFY_EX)(UINT, NMHDR*, LRESULT*);
// type safe variant for thread messages
void (AFX_MSG_CALL CWinThread::*pfn_THREAD)(WPARAM, LPARAM);
// specific type safe variants for WM-style messages
BOOL (AFX_MSG_CALL CWnd::*pfn_bD)(CDC*);
BOOL (AFX_MSG_CALL CWnd::*pfn_bb)(BOOL);
BOOL (AFX_MSG_CALL CWnd::*pfn_bWww)(CWnd*, UINT, UINT);
BOOL (AFX_MSG_CALL CWnd::*pfn_bHELPINFO)(HELPINFO*);
BOOL (AFX_MSG_CALL CWnd::*pfn_bWCDS)(CWnd*, COPYDATASTRUCT*);
HBRUSH (AFX_MSG_CALL CWnd::*pfn_hDWw)(CDC*, CWnd*, UINT);
HBRUSH (AFX_MSG_CALL CWnd::*pfn_hDw)(CDC*, UINT);
int (AFX_MSG_CALL CWnd::*pfn_iwWw)(UINT, CWnd*, UINT);
int (AFX_MSG_CALL CWnd::*pfn_iww)(UINT, UINT);
int (AFX_MSG_CALL CWnd::*pfn_iWww)(CWnd*, UINT, UINT);
int (AFX_MSG_CALL CWnd::*pfn_is)(LPTSTR);
LRESULT (AFX_MSG_CALL CWnd::*pfn_lwl)(WPARAM, LPARAM);
LRESULT (AFX_MSG_CALL CWnd::*pfn_lwwM)(UINT, UINT, CMenu*);
void (AFX_MSG_CALL CWnd::*pfn_vv)(void);
void (AFX_MSG_CALL CWnd::*pfn_vw)(UINT);
void (AFX_MSG_CALL CWnd::*pfn_vww)(UINT, UINT);
void (AFX_MSG_CALL CWnd::*pfn_vvii)(int, int);
void (AFX_MSG_CALL CWnd::*pfn_vwww)(UINT, UINT, UINT);
void (AFX_MSG_CALL CWnd::*pfn_vwii)(UINT, int, int);
void (AFX_MSG_CALL CWnd::*pfn_vwl)(WPARAM, LPARAM);
void (AFX_MSG_CALL CWnd::*pfn_vbWW)(BOOL, CWnd*, CWnd*);
void (AFX_MSG_CALL CWnd::*pfn_vD)(CDC*);
void (AFX_MSG_CALL CWnd::*pfn_vM)(CMenu*);
void (AFX_MSG_CALL CWnd::*pfn_vMwb)(CMenu*, UINT, BOOL);
void (AFX_MSG_CALL CWnd::*pfn_vW)(CWnd*);
void (AFX_MSG_CALL CWnd::*pfn_vWww)(CWnd*, UINT, UINT);
void (AFX_MSG_CALL CWnd::*pfn_vWp)(CWnd*, CPoint);
void (AFX_MSG_CALL CWnd::*pfn_vWh)(CWnd*, HANDLE);
void (AFX_MSG_CALL CWnd::*pfn_vwW)(UINT, CWnd*);
void (AFX_MSG_CALL CWnd::*pfn_vwWb)(UINT, CWnd*, BOOL);
void (AFX_MSG_CALL CWnd::*pfn_vwwW)(UINT, UINT, CWnd*);
void (AFX_MSG_CALL CWnd::*pfn_vwwx)(UINT, UINT);
void (AFX_MSG_CALL CWnd::*pfn_vs)(LPTSTR);
void (AFX_MSG_CALL CWnd::*pfn_vOWNER)(int, LPTSTR); // force return TRUE
int (AFX_MSG_CALL CWnd::*pfn_iis)(int, LPTSTR);
UINT (AFX_MSG_CALL CWnd::*pfn_wp)(CPoint);
UINT (AFX_MSG_CALL CWnd::*pfn_wv)(void);
void (AFX_MSG_CALL CWnd::*pfn_vPOS)(WINDOWPOS*);
void (AFX_MSG_CALL CWnd::*pfn_vCALC)(BOOL, NCCALCSIZE_PARAMS*);
void (AFX_MSG_CALL CWnd::*pfn_vwp)(UINT, CPoint);
void (AFX_MSG_CALL CWnd::*pfn_vwwh)(UINT, UINT, HANDLE);
BOOL (AFX_MSG_CALL CWnd::*pfn_bwsp)(UINT, short, CPoint);
void (AFX_MSG_CALL CWnd::*pfn_vws)(UINT, LPCTSTR);
};
**********************************************************************
BOOL CWnd::OnWndMsg(UINT message, WPARAM wParam, LPARAM lParam, LRESULT* pResult)
{
LRESULT lResult = 0;
// special case for commands
if (message == WM_COMMAND)
{
if (OnCommand(wParam, lParam))
{
lResult = 1;
goto LReturnTrue;
}
return FALSE;
}
// special case for notifies
if (message == WM_NOTIFY)
{
NMHDR* pNMHDR = (NMHDR*)lParam;
if (pNMHDR->hwndFrom != NULL && OnNotify(wParam, lParam, &lResult))
goto LReturnTrue;
return FALSE;
}
// special case for activation
if (message == WM_ACTIVATE)
_AfxHandleActivate(this, wParam, CWnd::FromHandle((HWND)lParam));
// special case for set cursor HTERROR
if (message == WM_SETCURSOR &&
_AfxHandleSetCursor(this, (short)LOWORD(lParam), HIWORD(lParam)))
{
lResult = 1;
goto LReturnTrue;
}
const AFX_MSGMAP* pMessageMap; pMessageMap = GetMessageMap();
this->GetMessageMap===pFrame->GetMessageMap 回到宏展开取链表的头结点
UINT iHash; iHash = (LOWORD((DWORD)pMessageMap) ^ message) & (iHashMax-1);
AfxLockGlobals(CRIT_WINMSGCACHE);
AFX_MSG_CACHE* pMsgCache; pMsgCache = &_afxMsgCache[iHash];
const AFX_MSGMAP_ENTRY* lpEntry;
if (message == pMsgCache->nMsg && pMessageMap == pMsgCache->pMessageMap)
{
// cache hit
lpEntry = pMsgCache->lpEntry;
AfxUnlockGlobals(CRIT_WINMSGCACHE);
if (lpEntry == NULL)
return FALSE;
// cache hit, and it needs to be handled
if (message < 0xC000)
goto LDispatch;
else
goto LDispatchRegistered;
}
else
{
// not in cache, look for it
pMsgCache->nMsg = message;
pMsgCache->pMessageMap = pMessageMap;
#ifdef _AFXDLL
for (/* pMessageMap already init'ed */; pMessageMap != NULL;
pMessageMap = (*pMessageMap->pfnGetBaseMap)())
#else
for (/* pMessageMap already init'ed */; pMessageMap != NULL;
pMessageMap = pMessageMap->pBaseMap)
#endif
{
// Note: catch not so common but fatal mistake!!
// BEGIN_MESSAGE_MAP(CMyWnd, CMyWnd)
#ifdef _AFXDLL
ASSERT(pMessageMap != (*pMessageMap->pfnGetBaseMap)());
#else
ASSERT(pMessageMap != pMessageMap->pBaseMap);
#endif
if (message < 0xC000)
{
// constant window message
if ((lpEntry = AfxFindMessageEntry(pMessageMap->lpEntries,
message, 0, 0)) != NULL)
{
pMsgCache->lpEntry = lpEntry;
AfxUnlockGlobals(CRIT_WINMSGCACHE);
goto LDispatch; //跳出for循环
}
}
else
{
// registered windows message
lpEntry = pMessageMap->lpEntries;
while ((lpEntry = AfxFindMessageEntry(lpEntry, 0xC000, 0, 0)) != NULL)
{
UINT* pnID = (UINT*)(lpEntry->nSig);
ASSERT(*pnID >= 0xC000 || *pnID == 0);
// must be successfully registered
if (*pnID == message)
{
pMsgCache->lpEntry = lpEntry;
AfxUnlockGlobals(CRIT_WINMSGCACHE);
goto LDispatchRegistered;
}
lpEntry++; // keep looking past this one
}
}
}
pMsgCache->lpEntry = NULL;
AfxUnlockGlobals(CRIT_WINMSGCACHE);
return FALSE;
}
ASSERT(FALSE); // not reached
LDispatch:
ASSERT(message < 0xC000);
union MessageMapFunctions mmf;
mmf.pfn = lpEntry->pfn;
// if we've got WM_SETTINGCHANGE / WM_WININICHANGE, we need to
// decide if we're going to call OnWinIniChange() or OnSettingChange()
int nSig;
nSig = lpEntry->nSig;
if (lpEntry->nID == WM_SETTINGCHANGE)
{
DWORD dwVersion = GetVersion();
if (LOBYTE(LOWORD(dwVersion)) >= 4)
nSig = AfxSig_vws;
else
nSig = AfxSig_vs;
}
switch (nSig)
{
default:
ASSERT(FALSE);
break;
case AfxSig_bD:
lResult = (this->*mmf.pfn_bD)(CDC::FromHandle((HDC)wParam));
break;
case AfxSig_bb: // AfxSig_bb, AfxSig_bw, AfxSig_bh
lResult = (this->*mmf.pfn_bb)((BOOL)wParam);
break;
case AfxSig_bWww: // really AfxSig_bWiw
lResult = (this->*mmf.pfn_bWww)(CWnd::FromHandle((HWND)wParam),
(short)LOWORD(lParam), HIWORD(lParam));
break;
case AfxSig_bWCDS:
lResult = (this->*mmf.pfn_bWCDS)(CWnd::FromHandle((HWND)wParam),
(COPYDATASTRUCT*)lParam);
break;
case AfxSig_bHELPINFO:
lResult = (this->*mmf.pfn_bHELPINFO)((HELPINFO*)lParam);
break;
case AfxSig_hDWw:
{
// special case for OnCtlColor to avoid too many temporary objects
ASSERT(message == WM_CTLCOLOR);
AFX_CTLCOLOR* pCtl = (AFX_CTLCOLOR*)lParam;
CDC dcTemp; dcTemp.m_hDC = pCtl->hDC;
CWnd wndTemp; wndTemp.m_hWnd = pCtl->hWnd;
UINT nCtlType = pCtl->nCtlType;
// if not coming from a permanent window, use stack temporary
CWnd* pWnd = CWnd::FromHandlePermanent(wndTemp.m_hWnd);
if (pWnd == NULL)
{
#ifndef _AFX_NO_OCC_SUPPORT
// determine the site of the OLE control if it is one
COleControlSite* pSite;
if (m_pCtrlCont != NULL && (pSite = (COleControlSite*)
m_pCtrlCont->m_siteMap.GetValueAt(wndTemp.m_hWnd)) != NULL)
{
wndTemp.m_pCtrlSite = pSite;
}
#endif
pWnd = &wndTemp;
}
HBRUSH hbr = (this->*mmf.pfn_hDWw)(&dcTemp, pWnd, nCtlType);
// fast detach of temporary objects
dcTemp.m_hDC = NULL;
wndTemp.m_hWnd = NULL;
lResult = (LRESULT)hbr;
}
break;
case AfxSig_hDw:
{
// special case for CtlColor to avoid too many temporary objects
ASSERT(message == WM_REFLECT_BASE+WM_CTLCOLOR);
AFX_CTLCOLOR* pCtl = (AFX_CTLCOLOR*)lParam;
CDC dcTemp; dcTemp.m_hDC = pCtl->hDC;
UINT nCtlType = pCtl->nCtlType;
HBRUSH hbr = (this->*mmf.pfn_hDw)(&dcTemp, nCtlType);
// fast detach of temporary objects
dcTemp.m_hDC = NULL;
lResult = (LRESULT)hbr;
}
break;
case AfxSig_iwWw:
lResult = (this->*mmf.pfn_iwWw)(LOWORD(wParam),
CWnd::FromHandle((HWND)lParam), HIWORD(wParam));
break;
case AfxSig_iww:
lResult = (this->*mmf.pfn_iww)(LOWORD(wParam), HIWORD(wParam));
break;
case AfxSig_iWww: // really AfxSig_iWiw
lResult = (this->*mmf.pfn_iWww)(CWnd::FromHandle((HWND)wParam),
(short)LOWORD(lParam), HIWORD(lParam));
break;
case AfxSig_is:
lResult = (this->*mmf.pfn_is)((LPTSTR)lParam);
break;
case AfxSig_lwl:
lResult = (this->*mmf.pfn_lwl)(wParam, lParam);
break;
case AfxSig_lwwM:
lResult = (this->*mmf.pfn_lwwM)((UINT)LOWORD(wParam),
(UINT)HIWORD(wParam), (CMenu*)CMenu::FromHandle((HMENU)lParam));
break;
case AfxSig_vv:
(this->*mmf.pfn_vv)();
break;
case AfxSig_vw: // AfxSig_vb, AfxSig_vh
(this->*mmf.pfn_vw)(wParam);
break;
case AfxSig_vww:
(this->*mmf.pfn_vww)((UINT)wParam, (UINT)lParam);
break;
case AfxSig_vvii:
(this->*mmf.pfn_vvii)((short)LOWORD(lParam), (short)HIWORD(lParam));
break;
case AfxSig_vwww:
(this->*mmf.pfn_vwww)(wParam, LOWORD(lParam), HIWORD(lParam));
break;
case AfxSig_vwii:
(this->*mmf.pfn_vwii)(wParam, LOWORD(lParam), HIWORD(lParam));
break;
case AfxSig_vwl:
(this->*mmf.pfn_vwl)(wParam, lParam);
break;
case AfxSig_vbWW:
(this->*mmf.pfn_vbWW)(m_hWnd == (HWND)lParam,
CWnd::FromHandle((HWND)lParam),
CWnd::FromHandle((HWND)wParam));
break;
case AfxSig_vD:
(this->*mmf.pfn_vD)(CDC::FromHandle((HDC)wParam));
break;
case AfxSig_vM:
(this->*mmf.pfn_vM)(CMenu::FromHandle((HMENU)wParam));
break;
case AfxSig_vMwb:
(this->*mmf.pfn_vMwb)(CMenu::FromHandle((HMENU)wParam),
LOWORD(lParam), (BOOL)HIWORD(lParam));
break;
case AfxSig_vW:
(this->*mmf.pfn_vW)(CWnd::FromHandle((HWND)wParam));
break;
case AfxSig_vW2:
(this->*mmf.pfn_vW)(CWnd::FromHandle((HWND)lParam));
break;
case AfxSig_vWww:
(this->*mmf.pfn_vWww)(CWnd::FromHandle((HWND)wParam), LOWORD(lParam),
HIWORD(lParam));
break;
case AfxSig_vWp:
{
CPoint point((DWORD)lParam);
(this->*mmf.pfn_vWp)(CWnd::FromHandle((HWND)wParam), point);
}
break;
case AfxSig_vWh:
(this->*mmf.pfn_vWh)(CWnd::FromHandle((HWND)wParam),
(HANDLE)lParam);
break;
case AfxSig_vwW:
(this->*mmf.pfn_vwW)(wParam, CWnd::FromHandle((HWND)lParam));
break;
case AfxSig_vwWb:
(this->*mmf.pfn_vwWb)((UINT)(LOWORD(wParam)),
CWnd::FromHandle((HWND)lParam), (BOOL)HIWORD(wParam));
break;
case AfxSig_vwwW:
case AfxSig_vwwx:
{
// special case for WM_VSCROLL and WM_HSCROLL
ASSERT(message == WM_VSCROLL || message == WM_HSCROLL ||
message == WM_VSCROLL+WM_REFLECT_BASE || message == WM_HSCROLL+WM_REFLECT_BASE);
int nScrollCode = (short)LOWORD(wParam);
int nPos = (short)HIWORD(wParam);
if (lpEntry->nSig == AfxSig_vwwW)
(this->*mmf.pfn_vwwW)(nScrollCode, nPos,
CWnd::FromHandle((HWND)lParam));
else
(this->*mmf.pfn_vwwx)(nScrollCode, nPos);
}
break;
case AfxSig_vs:
(this->*mmf.pfn_vs)((LPTSTR)lParam);
break;
case AfxSig_vws:
(this->*mmf.pfn_vws)((UINT) wParam, (LPCTSTR)lParam);
break;
case AfxSig_vOWNER:
(this->*mmf.pfn_vOWNER)((int)wParam, (LPTSTR)lParam);
lResult = TRUE;
break;
case AfxSig_iis:
lResult = (this->*mmf.pfn_iis)((int)wParam, (LPTSTR)lParam);
break;
case AfxSig_wp:
{
CPoint point((DWORD)lParam);
lResult = (this->*mmf.pfn_wp)(point);
}
break;
case AfxSig_wv: // AfxSig_bv, AfxSig_wv
lResult = (this->*mmf.pfn_wv)();
break;
case AfxSig_vCALC:
(this->*mmf.pfn_vCALC)((BOOL)wParam, (NCCALCSIZE_PARAMS*)lParam);
break;
case AfxSig_vPOS:
(this->*mmf.pfn_vPOS)((WINDOWPOS*)lParam);
break;
case AfxSig_vwwh:
(this->*mmf.pfn_vwwh)(LOWORD(wParam), HIWORD(wParam), (HANDLE)lParam);
break;
case AfxSig_vwp:
{
CPoint point((DWORD)lParam);
(this->*mmf.pfn_vwp)(wParam, point);
break;
}
case AfxSig_vwSIZING:
(this->*mmf.pfn_vwl)(wParam, lParam);
lResult = TRUE;
break;
case AfxSig_bwsp:
lResult = (this->*mmf.pfn_bwsp)(LOWORD(wParam), (short) HIWORD(wParam),
CPoint(LOWORD(lParam), HIWORD(lParam)));
if (!lResult)
return FALSE;
}
goto LReturnTrue;
LDispatchRegistered: // for registered windows messages
ASSERT(message >= 0xC000);
mmf.pfn = lpEntry->pfn;
lResult = (this->*mmf.pfn_lwl)(wParam, lParam);
LReturnTrue:
if (pResult != NULL)
*pResult = lResult;
return TRUE;
}
**********************************************************************
struct AFX_MSGMAP
{
#ifdef _AFXDLL
const AFX_MSGMAP* (PASCAL* pfnGetBaseMap)();
#else
const AFX_MSGMAP* pBaseMap;
#endif
const AFX_MSGMAP_ENTRY* lpEntries;
};
struct AFX_MSGMAP_ENTRY{
UINT nMessage;//消息ID
UINT nCode; //通知码
UINT nID; //命令ID/控件ID
UINT nLastID; //最后一个控件ID
UINT nSig; //消息处理函数的类型
AFX_PMSG pfn; //消息处理函数的地址(指针)
};
struct AFX_MSGMAP_ENTRY
{
UINT nMessage; // windows message
UINT nCode; // control code or WM_NOTIFY code
UINT nID; // control ID (or 0 for windows messages)
UINT nLastID; // used for entries specifying a range of control id's
UINT nSig; // signature type (action) or pointer to message #
AFX_PMSG pfn; // routine to call (or special value)
};
*********************************************************************
#ifdef _AFXDLL //定义动态库
#define DECLARE_MESSAGE_MAP() private: static const AFX_MSGMAP_ENTRY _messageEntries[]; protected: static AFX_DATA const AFX_MSGMAP messageMap; static const AFX_MSGMAP* PASCAL _GetBaseMessageMap(); virtual const AFX_MSGMAP* GetMessageMap() const;
#else
#define DECLARE_MESSAGE_MAP() private: static const AFX_MSGMAP_ENTRY _messageEntries[]; \ //静态映射数组
protected: static AFX_DATA const AFX_MSGMAP messageMap; virtual const AFX_MSGMAP* GetMessageMap() const;
#endif
#ifdef _AFXDLL
#define DECLARE_MESSAGE_MAP() private: static const AFX_MSGMAP_ENTRY _messageEntries[]; protected: static AFX_DATA const AFX_MSGMAP messageMap; static const AFX_MSGMAP* PASCAL _GetBaseMessageMap(); virtual const AFX_MSGMAP* GetMessageMap() const;
#else
#define DECLARE_MESSAGE_MAP() private: static const AFX_MSGMAP_ENTRY _messageEntries[]; protected: static AFX_DATA const AFX_MSGMAP messageMap; virtual const AFX_MSGMAP* GetMessageMap() const;
#endif
#ifdef _AFXDLL
#define BEGIN_MESSAGE_MAP(theClass, baseClass) const AFX_MSGMAP* PASCAL theClass::_GetBaseMessageMap() { return &baseClass::messageMap; } const AFX_MSGMAP* theClass::GetMessageMap() const { return &theClass::messageMap; } AFX_COMDAT AFX_DATADEF const AFX_MSGMAP theClass::messageMap = { &theClass::_GetBaseMessageMap, &theClass::_messageEntries[0] }; AFX_COMDAT const AFX_MSGMAP_ENTRY theClass::_messageEntries[] = {
#else
#define BEGIN_MESSAGE_MAP(theClass, baseClass) const AFX_MSGMAP* theClass::GetMessageMap() const { return &theClass::messageMap; } AFX_COMDAT AFX_DATADEF const AFX_MSGMAP theClass::messageMap = { &baseClass::messageMap, &theClass::_messageEntries[0] }; AFX_COMDAT const AFX_MSGMAP_ENTRY theClass::_messageEntries[] = {
#endif
*********************************************************************
#ifdef _AFXDLL
#define BEGIN_MESSAGE_MAP(theClass, baseClass) const AFX_MSGMAP* PASCAL theClass::_GetBaseMessageMap() { return &baseClass::messageMap; } const AFX_MSGMAP* theClass::GetMessageMap() const { return &theClass::messageMap; } AFX_COMDAT AFX_DATADEF const AFX_MSGMAP theClass::messageMap = { &theClass::_GetBaseMessageMap, &theClass::_messageEntries[0] }; AFX_COMDAT const AFX_MSGMAP_ENTRY theClass::_messageEntries[] = {
#else
#define BEGIN_MESSAGE_MAP(theClass, baseClass) const AFX_MSGMAP* theClass::GetMessageMap() const { return &theClass::messageMap; } AFX_COMDAT AFX_DATADEF const AFX_MSGMAP theClass::messageMap = { &baseClass::messageMap, &theClass::_messageEntries[0] }; AFX_COMDAT const AFX_MSGMAP_ENTRY theClass::_messageEntries[] = {
#endif
**********************************************************************
#define ON_MESSAGE(message, memberFxn) { message, 0, 0, 0, AfxSig_lwl, (AFX_PMSG)(AFX_PMSGW)(LRESULT (AFX_MSG_CALL CWnd::*)(WPARAM, LPARAM))&memberFxn },
***********************************************************************
N_EN_KILLFOCUS(id, memberFxn) \
ON_CONTROL(EN_KILLFOCUS, id, memberFxn)
#define ON_EN_CHANGE(id, memberFxn) \
ON_CONTROL(EN_CHANGE, id, memberFxn)
#define ON_EN_UPDATE(id, memberFxn) \
ON_CONTROL(EN_UPDATE, id, memberFxn)
#define ON_EN_ERRSPACE(id, memberFxn) \
ON_CONTROL(EN_ERRSPACE, id, memberFxn)
#define ON_EN_MAXTEXT(id, memberFxn) \
ON_CONTROL(EN_MAXTEXT, id, memberFxn)
#define ON_EN_HSCROLL(id, memberFxn) \
ON_CONTROL(EN_HSCROLL, id, memberFxn)
#define ON_EN_VSCROLL(id, memberFxn) \
ON_CONTROL(EN_VSCROLL, id, memberFxn)
#define ON_CONTROL(wNotifyCode, id, memberFxn) \
{ WM_COMMAND, (WORD)wNotifyCode, (WORD)id, (WORD)id, AfxSig_vv, \
(AFX_PMSG)&memberFxn },
**********************************************************************
进程间通信
HWND FindWindow(
LPCTSTR lpClassName, // class name
LPCTSTR lpWindowName // window name
);
//注意窗口标题栏不可同名
创建一个按钮，按钮被点击时，向另一个进程窗口发送自定义消息
接收发送的消息，并处理。。弹出提示框。
**********************************************************************
struct AFX_MSGMAP_ENTRY{
UINT nMessage;//消息ID
UINT nCode; //通知码
UINT nID; //命令ID/控件ID
UINT nLastID; //最后一个控件ID
UINT nSig; //消息处理函数的类型
AFX_PMSG pfn; //消息处理函数的地址(指针)
};
struct AFX_MSGMAP
{
const AFX_MSGMAP* pBaseMap;
const AFX_MSGMAP_ENTRY* lpEntries;
};
两个简单的win32模拟mfc程序 (工程均是链接mfc静态库)
// MFCMessage.cpp : Defines the entry point for the application.
//
#include "stdafx.h"
class CMyFrameWnd:public CFrameWnd{
// DECLARE_MESSAGE_MAP()
///////////////////////////////////////
// replace DECLARE_MESSAGE_MAP()
private:
static const AFX_MSGMAP_ENTRY _messageEntries[];
//
protected:
static AFX_DATA const AFX_MSGMAP messageMap;
virtual const AFX_MSGMAP* GetMessageMap() const;
/*
*/
////////////////////////////////////////
public:
int m_xPos;
int m_yPos;
CMyFrameWnd(int x=100,int y=100);
LRESULT OnCreate(WPARAM wParam,LPARAM lParam);
LRESULT OnPaint(WPARAM wParam,LPARAM lParam);
LRESULT OnMouseMove(WPARAM wParam,LPARAM lParam);
};
CMyFrameWnd::CMyFrameWnd(int x,int y){
m_xPos=x;
m_yPos=y;
}
LRESULT CMyFrameWnd::OnCreate(WPARAM wParam,LPARAM lParam){
AfxMessageBox("CMyframeWnd::OnCreate");
return 0;
}
LRESULT CMyFrameWnd::OnMouseMove(WPARAM wParam,LPARAM lParam){
m_xPos=LOWORD(lParam);
m_yPos=HIWORD(lParam);
// m_xPos = ::GET_X_LPARAM(lParam);
// m_yPos = ::GET_Y_LPARAM(lParam);
::InvalidateRect(m_hWnd,NULL,TRUE);
return 0;
}
LRESULT CMyFrameWnd::OnPaint(WPARAM wParam,LPARAM lParam){
PAINTSTRUCT ps={0};
HDC hDC=::BeginPaint(m_hWnd,&ps);
::TextOut(hDC,m_xPos,m_yPos,"hello",5);
::EndPaint(m_hWnd,&ps);
return 0;
}
class CMyWinApp:public CWinApp{
public:
virtual BOOL InitInstance();
CMyWinApp(){}
};
// BEGIN_MESSAGE_MAP(CMyFrameWnd,CFrameWnd)////本类，基类
const AFX_MSGMAP* CMyFrameWnd::GetMessageMap() const {
return &CMyFrameWnd::messageMap;
}
AFX_COMDAT AFX_DATADEF const AFX_MSGMAP CMyFrameWnd::messageMap = {
&CFrameWnd::messageMap, &CMyFrameWnd::_messageEntries[0]
};
AFX_COMDAT const AFX_MSGMAP_ENTRY CMyFrameWnd::_messageEntries[] = {
/*
*/
// ON_MESSAGE(WM_MOUSEMOVE,OnMouseMove)
// ON_MESSAGE(WM_CREATE,OnCreate)
// ON_MESSAGE(WM_PAINT,OnPaint) //add to the array
{
WM_CREATE, 0, 0, 0, AfxSig_lwl,
(AFX_PMSG)(AFX_PMSGW)(LRESULT (AFX_MSG_CALL CWnd::*) (WPARAM, LPARAM))&OnCreate
},
/* */
END_MESSAGE_MAP()
/*
//#define END_MESSAGE_MAP()
{
0, 0, 0, 0, AfxSig_end, (AFX_PMSG)0
}
};
*/
CMyWinApp theApp;
BOOL CMyWinApp::InitInstance(){
CMyFrameWnd *pFrame=new CMyFrameWnd();
pFrame->Create(NULL,"MFCMsg");
m_pMainWnd=pFrame;
pFrame->ShowWindow(SW_SHOW);
pFrame->UpdateWindow();
return TRUE;
}
下面是第二个程序
// MFCMsg.cpp : Defines the entry point for the application.
//
#include "stdafx.h"
#define WM_MYMESSAGE WM_USER+10001
class CMyFrameWnd:public CFrameWnd{
DECLARE_MESSAGE_MAP()
public:
afx_msg int OnCreate(LPCREATESTRUCT cs);
afx_msg void OnPaint(void);
afx_msg void OnTest1();
afx_msg void OnTest(UINT nID);
afx_msg LRESULT OnMyMessage(WPARAM, LPARAM);
afx_msg void OnEnChange( );
};
BEGIN_MESSAGE_MAP(CMyFrameWnd,CFrameWnd)
ON_WM_CREATE()
ON_WM_PAINT()
ON_COMMAND(1001,OnTest1)
ON_COMMAND_RANGE(1002,1003,OnTest)
ON_MESSAGE(WM_MYMESSAGE,OnMyMessage)
ON_EN_CHANGE(1004,OnEnChange)
END_MESSAGE_MAP()
int CMyFrameWnd::OnCreate(LPCREATESTRUCT cs){
// AfxMessageBox("WM_CREATE");
CreateWindowEx(0,"BUTTON","Test1",WS_CHILD|WS_VISIBLE,100,100,100,40,
m_hWnd,(HMENU)1001,AfxGetInstanceHandle(),NULL);
CreateWindowEx(0,"BUTTON","Test2",WS_CHILD|WS_VISIBLE,100,200,100,40,
m_hWnd,(HMENU)1002,AfxGetInstanceHandle(),NULL);
CreateWindowEx(0,"BUTTON","Test3",WS_CHILD|WS_VISIBLE,100,300,100,40,
m_hWnd,(HMENU)1003,AfxGetInstanceHandle(),NULL);
CreateWindowEx(0,"EDIT","Test4",WS_CHILD|WS_VISIBLE|WS_BORDER,300,100,200,100,
m_hWnd,(HMENU)1004,AfxGetInstanceHandle(),NULL);
return CFrameWnd::OnCreate(cs);
}
void CMyFrameWnd::OnPaint(void){
PAINTSTRUCT ps={0};
HDC hDC=::BeginPaint(m_hWnd,&ps);
::TextOut(hDC,100,100,"hello",5);
::EndPaint(m_hWnd,&ps);
// return (void)(CFrameWnd::OnPaint());
}
void CMyFrameWnd::OnTest1(){
AfxMessageBox("Test1");
// SendMessage(WM_MYMESSAGE,0,1); //this=pFrame
HWND hWnd=::FindWindow(NULL,"MFCCreate");
::SendMessage(hWnd,WM_MYMESSAGE,0,1);
}
void CMyFrameWnd::OnTest(UINT nID){
if(1002==nID){
AfxMessageBox("Test2 clicked!");
}else if(1003==nID){
AfxMessageBox("Test3 clicked!");
}
}
LRESULT CMyFrameWnd::OnMyMessage(WPARAM wParam, LPARAM lParam){
CString str;
str.Format("wParam=%d\tlParam=%d",wParam,lParam);
AfxMessageBox(str);
return 0;
}
void CMyFrameWnd::OnEnChange(){
AfxMessageBox("content changed!");
}
class CMyWinApp:public CWinApp{
public:
virtual BOOL InitInstance();
};
CMyWinApp theApp;
BOOL CMyWinApp::InitInstance(){
CMyFrameWnd *pFrame=new CMyFrameWnd();
pFrame->Create(NULL,"MFCMsg");
m_pMainWnd=pFrame;
pFrame->ShowWindow(SW_SHOW);
pFrame->UpdateWindow();
return TRUE;
}
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