給EditCtrl添加自定義菜單並實現Copy，Cut和Paste功能

首先自定義一個類CEditCtrl，該類繼承與CEdit。在類中添加OnContextMenu(CWnd*, CPoint);

void CEdit::OnContextMenu(CWnd*, CPoint) { CMenu Menu; Menu.LoadMenu(IDR_MENU_CONTEXT); // IDR_MENU_CONTEXT是自定義的菜單的ID CMenu* pMenu = Menu.GetSubMenu( 0 ); CPoint Pos; GetCursorPos(&Pos); pMenu->TrackPopupMenu(TPM_LEFTALIGN|TPM_LEFTBUTTON, Pos.x, Pos.y); } 

 

 在以上函數中的IDR_MENU_CONTEXT Menu中添加Copy，Cut和Paste項ID分別爲ID_MENU_COPY， ID_MENU_CUT和ID_MENU_PASTE。

   在CEdtiCtrl中添加這幾個菜單項的響應函數

 

void CEditCtrl::OnMenuCopy() { CString sText; GetWindowText(sText); int nSelStart =0, nSelEnd = 0; GetSel(nSelStart, nSelEnd); std :: string sDest = sText; sDest = sDest.substr(nSelStart, nSelEnd-nSelStart); if ( OpenClipboard() ) { HGLOBAL ClipBuffer; char* pBuf; EmptyClipboard(); Clipbuffer = GlobalAlloc(GMEM_DDESHARE, sText.GetLength()+1); pBuf = (char*)GlobalLock(ClipBuffer): strcpy(pBuf, sDest.c_str()): GlobalUnlock(ClipBuffer); SetClipboardData(CF_TEXT, ClipBuffer); CloseClipboard(); } } 

void CEditCtrl::OnMenuPaste() { CString sText; GetWindowText(sText); int nSelStart =0, nSelEnd = 0; GetSel(nSelStart, nSelEnd); std :: string sDest = sText; std :: string sFront = sDest.substr(0, nSelStart); std :: string sBack = sDest.substr(nSelEnd, sDest.size()); char* pBuf = NULL; if ( OpenClipboard() ) { HGLOBAL ClipBuffer; ClipBuffer = GetClipboardData(CF_TEXT); pBuf = (char*)GlobalLock(ClipBuffer): GlobalUnlock(ClipBuffer); CloseClipboard(); } if ( pBuf ) { sDest.clear(); sDest += sFront; sDest += pBuf; sDest += sBack; SetWindowText(sDest.c_str()); } SetSel((int)sDest.size(), –1); // 光標移到文字最後邊。 } void CEditCtrl::OnMenuCut() { CString sText; GetWindowText(sText); int nSelStart =0, nSelEnd = 0; GetSel(nSelStart, nSelEnd); std :: string sSel = sText; sDest = sDest.substr(nSelStart, nSelEnd-nSelStart); if ( OpenClipboard() ) { HGLOBAL ClipBuffer; char* pBuf; EmptyClipboard(); Clipbuffer = GlobalAlloc(GMEM_DDESHARE, sText.GetLength()+1); pBuf = (char*)GlobalLock(ClipBuffer): strcpy(pBuf, sSel.c_str()): GlobalUnlock(ClipBuffer); SetClipboardData(CF_TEXT, ClipBuffer); CloseClipboard(); std :: string sTmp = sText; std :: string sFront = sTmp.substr(0, nSelStart); std :: string sBack = sTmp.substr(nSelEnd, sTmp.size()): std :: string sDest; sDest += sTmp; sDest += sBack; SetWindowText(sDest.c_str()); } }