自学教程：C++ GetSel函数代码示例

void CRichEditCtrlX::UpdateSyntaxColoring(){	CString strText;	GetWindowText(strText);	if (strText.IsEmpty())		return;	m_bSelfUpdate = true;	long lCurSelStart, lCurSelEnd;	GetSel(lCurSelStart, lCurSelEnd);	SetSel(0, -1);	SetSelectionCharFormat(m_cfDef);	SetSel(lCurSelStart, lCurSelEnd);	LPTSTR pszStart = const_cast<LPTSTR>((LPCTSTR)strText);	LPCTSTR psz = pszStart;	while (*psz != _T('/0'))	{		if (*psz == _T('/"'))		{			LPCTSTR pszEnd = _tcschr(psz + 1, _T('/"'));			if (pszEnd)				psz = pszEnd + 1;			else				break;		}		else		{			bool bFoundKeyword = false;			for (int k = 0; k < m_astrKeywords.GetCount(); k++)			{				const CString& rstrKeyword = m_astrKeywords[k];				int iKwLen = rstrKeyword.GetLength();				if (_tcsncmp(psz, rstrKeyword, iKwLen)==0 && (psz[iKwLen]==_T('/0') || _tcschr(m_strSeperators, psz[iKwLen])!=NULL))				{					long iStart = static_cast<long>(psz - pszStart);					long iEnd = static_cast<long>(iStart + iKwLen);					long lCurSelStart, lCurSelEnd;					GetSel(lCurSelStart, lCurSelEnd);					SetSel(iStart, iEnd);					SetSelectionCharFormat(m_cfKeyword);					SetSel(lCurSelStart, lCurSelEnd);					psz += iKwLen;					bFoundKeyword = true;					break;				}			}			if (!bFoundKeyword)				psz++;		}	}	UpdateWindow();	m_bSelfUpdate = false;}

void WINAPI duListBox::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags){	int nItemCount = GetItemCount();	if (nItemCount == 0)		return;	if (nChar == VK_UP)	{		int nSel = GetSel();		nSel--;		if (nSel < 0)			nSel = 0;		if (nSel >= nItemCount)			nSel = nItemCount - 1;		SetSel(nSel);		duScroll *pScroll = (duScroll *)GetPluginByName(m_szVertScroll);		if (pScroll)		{			pScroll->SetPos(m_nItemHeight * nSel);			UpdateScroll();		}		if (!m_fCombobox)		{			m_pHotItem = NULL;			Plugin_Redraw(this, TRUE);		}		else		{			FadeRedraw();		}	}	else if (nChar == VK_DOWN)	{		int nSel = GetSel();		_TRACE(_T("nSel :%d/n"), nSel);		nSel++;		if (nSel >= nItemCount)			nSel = nItemCount - 1;		if (nSel < 0)			nSel = 0;		SetSel(nSel);		duScroll *pScroll = (duScroll *)GetPluginByName(m_szVertScroll);		if (pScroll)		{			pScroll->SetPos(m_nItemHeight * nSel);			UpdateScroll();		}		if (!m_fCombobox)		{			m_pHotItem = NULL;			Plugin_Redraw(this, TRUE);		}		else			FadeRedraw();	}}

BOOL CMyDateEdit::CheckChar(UINT nChar){	int nTime = 0;	//如果不使用掩码，则返回	if(!m_bUseMask)	return TRUE;	//如果是控制字符，则返回	if(!isprint(nChar)) return TRUE;	if(!isdigit(nChar))		{		MessageBeep((UINT)-1);		return FALSE;	}	//如果存在选择区域，则取消选择	int startPos,endPos;	GetSel(startPos,endPos);	SetSel(-1,0);	//重新选中原选择区域的第一个字符	SetSel(startPos,startPos);	GetSel(startPos,endPos);	//确保字符串的长度不超过掩码的长度	if(endPos>=m_strMask.GetLength())	{		MessageBeep((UINT)-1);		return FALSE;	}	//时间格式	if(m_isTime)	{		if(!CheckTime(nChar,startPos,endPos))		{			return FALSE;		}	}	//日期格式	if(m_isDate)	{		if(!CheckDate(nChar,startPos,startPos))		{			return FALSE;		}	}	if(m_isDateTime)	{		if(!CheckDate(nChar,startPos,startPos))		{			return FALSE;		}		if(!CheckTime(nChar,startPos,startPos))		{			return FALSE;		}	}    return TRUE;}

    void NativeTextfieldWin::OnAfterPossibleChange(bool should_redraw_text)    {        // Prevent the user from selecting the "phantom newline" at the end of the        // edit.  If they try, we just silently move the end of the selection back to        // the end of the real text.        CHARRANGE new_sel;        GetSel(new_sel);        const int length = GetTextLength();        if(new_sel.cpMax > length)        {            new_sel.cpMax = length;            if(new_sel.cpMin > length)            {                new_sel.cpMin = length;            }            SetSel(new_sel);        }        std::wstring new_text(GetText());        if(new_text != text_before_change_)        {            if(ime_discard_composition_ && ime_composition_start_>=0 &&                ime_composition_length_>0)            {                // A string retrieved with a GetText() call contains a string being                // composed by an IME. We remove the composition string from this search                // string.                new_text.erase(ime_composition_start_, ime_composition_length_);                ime_composition_start_ = 0;                ime_composition_length_ = 0;                if(new_text.empty())                {                    return;                }            }            textfield_->SyncText();            UpdateAccessibleValue(textfield_->text());            if(should_redraw_text)            {                CHARRANGE original_sel;                GetSel(original_sel);                std::wstring text = GetText();                ScopedSuspendUndo suspend_undo(GetTextObjectModel());                SelectAll();                ReplaceSel(reinterpret_cast<LPCTSTR>(text.c_str()), true);                SetSel(original_sel);            }        }    }

/////////////////////////////////////////////////////////////////////////////// CMyDateEdit message handlersvoid CMyDateEdit::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags) {	CString str;	GetWindowText(str);	for (int i = 0; i<str.GetLength() && i<m_str.GetLength();i++)		m_str.SetAt(i, str.GetAt(i));	if(!m_bMaskKeyInProgress)		if(!CheckChar(nChar)) return;		if(m_bUseMask)  //要使用掩码		{			if(isdigit(nChar))  //是可打印字符			{				int startPos,endPos;				GetSel(startPos,endPos);				SetSel(startPos,endPos+1);				if(m_strMask.GetAt(startPos)=='-'||m_strMask.GetAt(startPos)==':'||m_strMask.GetAt(startPos)==' ')				{					SetSel(startPos+1,startPos+1);					SendChar(nChar);					return;				}			}			else if(nChar==VK_BACK)			{				int startPos,endPos;				GetSel(startPos,endPos);				if((startPos==endPos) && (startPos>=1) && (startPos<=m_str.GetLength()))				{					char c;					c=m_strMask.GetAt(startPos-1);					if(c=='-'||c==':'||c==' ') 					{											SetSel(startPos-1,startPos-1);						return;					}					////回退光标					SetSel(startPos-1,startPos-1);					SendChar(c);						//再次退回					SendMessage(WM_KEYDOWN,VK_LEFT,0);				}				else   //越界或者存在选择区域					MessageBeep((UINT)-1);				return;			}		}	CEdit::OnChar(nChar, nRepCnt, nFlags);}

void CIntEdit::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags){	if (!(nChar >= '0' && nChar <= '9' || nChar == '-' || nChar == '/b')) {		return;	}	CString str;	GetWindowText(str);	if (nChar == '-' && !str.IsEmpty() && str[0] == '-') {		return;	}	int nStartChar, nEndChar;	GetSel(nStartChar, nEndChar);	if (nChar == '/b' && nStartChar <= 0) {		return;	}	if (nChar == '-' && (nStartChar != 0 || nEndChar != 0)) {		return;	}	CEdit::OnChar(nChar, nRepCnt, nFlags);}

void CPropTreeItemFileEdit::OnContextMenu(CWnd *pWnd, CPoint point){	CMenu FloatingMenu;	VERIFY(FloatingMenu.LoadMenu(IDR_ME_EDIT_MENU));	CMenu *pPopupMenu = FloatingMenu.GetSubMenu(0);	if (CanUndo()) {		pPopupMenu->EnableMenuItem(ID_EDIT_UNDO, MF_BYCOMMAND | MF_ENABLED);	} else {		pPopupMenu->EnableMenuItem(ID_EDIT_UNDO, MF_BYCOMMAND | MF_DISABLED | MF_GRAYED);	}	DWORD dwSel = GetSel();	if (HIWORD(dwSel) != LOWORD(dwSel)) {		pPopupMenu->EnableMenuItem(ID_EDIT_CUT, MF_BYCOMMAND | MF_ENABLED);		pPopupMenu->EnableMenuItem(ID_EDIT_COPY, MF_BYCOMMAND | MF_ENABLED);		pPopupMenu->EnableMenuItem(ID_EDIT_DELETE, MF_BYCOMMAND | MF_ENABLED);	} else {		pPopupMenu->EnableMenuItem(ID_EDIT_CUT, MF_BYCOMMAND | MF_DISABLED | MF_GRAYED);		pPopupMenu->EnableMenuItem(ID_EDIT_COPY, MF_BYCOMMAND | MF_DISABLED | MF_GRAYED);		pPopupMenu->EnableMenuItem(ID_EDIT_DELETE, MF_BYCOMMAND | MF_DISABLED | MF_GRAYED);	}	pPopupMenu->TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON, point.x, point.y, this);}

void CPWL_Edit::PasteText() {  if (!CanPaste())    return;  CFX_WideString swClipboard;  if (IFX_SystemHandler* pSH = GetSystemHandler())    swClipboard = pSH->GetClipboardText(GetAttachedHWnd());  if (m_pFillerNotify) {    FX_BOOL bRC = TRUE;    FX_BOOL bExit = FALSE;    CFX_WideString strChangeEx;    int nSelStart = 0;    int nSelEnd = 0;    GetSel(nSelStart, nSelEnd);    m_pFillerNotify->OnBeforeKeyStroke(GetAttachedData(), swClipboard,                                       strChangeEx, nSelStart, nSelEnd, TRUE,                                       bRC, bExit, 0);    if (!bRC)      return;    if (bExit)      return;  }  if (swClipboard.GetLength() > 0) {    Clear();    InsertText(swClipboard.c_str());  }}

void CFileListBox::OnContextMenu(CWnd* pWnd, CPoint point) {    UNUSED_ALWAYS(pWnd);	CMenu menu;	menu.LoadMenu(IDR_TT_CONTEXTMENU);	CMenu *pPopup=menu.GetSubMenu(0);    /*    ScreenToClient(&point);    BOOL bOutside;    m_nIndex=ItemFromPoint(point,bOutside);    CRect rect;    GetItemRect(m_nIndex,rect);    if(bOutside || !rect.PtInRect(point)){        pPopup->EnableMenuItem(IDC_TT_REMOVE,MF_BYCOMMAND|MF_GRAYED);    }    ClientToScreen(&point);    */    for(int i=0;i<GetCount();i++){        if(GetSel(i)){            break;        }    }    if(i==GetCount()){        pPopup->EnableMenuItem(IDC_TT_REMOVE,MF_BYCOMMAND|MF_GRAYED);    }	pPopup->TrackPopupMenu(TPM_LEFTALIGN|TPM_LEFTBUTTON|TPM_RIGHTBUTTON, point.x,point.y,this);}

LRESULT CUrlRichEditCtrl::OnDropFiles(WPARAM wp, LPARAM /*lp*/) {	CHARRANGE crSelOrg;	GetSel(crSelOrg); // save this off	BOOL bEnable = !(GetStyle() & ES_READONLY) && IsWindowEnabled();		if (!bEnable)		return 0;		CStringArray aFiles;	CString sText;		SetSel(m_crDropSel);		int nNumFiles = FileMisc::GetDropFilePaths((HDROP)wp, aFiles);	::DragFinish((HDROP)wp);	::CloseClipboard();	if (nNumFiles > 0)		return CRichEditHelper::PasteFiles(*this, aFiles, REP_ASFILEURL);	// else 	return nNumFiles;}

BOOL CFulEditCtrl::ShowMenu(HWND hWnd, POINT &pt){	ScreenToClient(&pt);		CHARRANGE cr;	GetSel(cr);	if(cr.cpMax != cr.cpMin) {		TCHAR *buf = new TCHAR[cr.cpMax - cr.cpMin + 1];		GetSelText(buf);		searchTerm = Util::replace(buf, _T("/r"), _T("/r/n"));		delete[] buf;	} else {		tstring line;		tstring::size_type ch = TextUnderCursor(pt, line);        if( ch != tstring::npos ) {						tstring::size_type start = line.find_last_of(_T(" /t/r"), ch) + 1;						tstring::size_type end = line.find_first_of(_T(" /t/r"), start);			if(end == tstring::npos) {				end = line.length();			}			searchTerm = line.substr(start, end-start);		}	}	ClientToScreen(&pt);	WinUtil::AppendSearchMenu(searchMenu);		return menu.TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON, pt.x, pt.y, hWnd );}

void CInPlaceFloatEdit::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags){    if (nChar == VK_ESCAPE || nChar == VK_RETURN) {        if (nChar == VK_ESCAPE) {            m_bESC = TRUE;        }        GetParent()->SetFocus();        return;    }    if (nChar == ',') {        nChar = '.';    }    if (!(nChar >= '0' && nChar <= '9' || nChar == '.' || nChar == '/b')) {        return;    }    CString str;    GetWindowText(str);    if ((nChar == '.')  && str.Find('.') >= 0) {        int nStartChar, nEndChar;        GetSel(nStartChar, nEndChar);        if (!(nStartChar < nEndChar && str.Mid(nStartChar, nEndChar - nStartChar).Find('.') >= 0)) {            return;        }    }    //CEdit::OnChar(nChar, nRepCnt, nFlags);    DefWindowProc(WM_CHAR, nChar, MAKELONG(nRepCnt, nFlags));}

/* *	CTxtEdit::ObjectFromIOB * *	@mfunc	Gets an object based on an IOB type index. * *	@rdesc: *		pointer to COleObject or NULL if none. */COleObject * CTxtEdit::ObjectFromIOB(LONG iob){	COleObject * pobj = NULL;	CObjectMgr * pobjmgr = NULL;	pobjmgr = GetObjectMgr();	if (!pobjmgr)	{		return NULL;	}	// Figure out the index of the selection	if (iob == REO_IOB_SELECTION)	{		CTxtSelection * psel = GetSel();		pobj = pobjmgr->GetFirstObjectInRange(psel->GetCpMin(),			psel->GetCpMost());	}	else	{		// Make sure the IOB is in range		if ((0 <= iob) && (iob < GetObjectCount()))		{			pobj = pobjmgr->GetObjectFromIndex(iob);		}	}	return pobj;}

/*================CSyntaxRichEditCtrl::GetNameBeforeCurrentSelection================*/bool CSyntaxRichEditCtrl::GetNameBeforeCurrentSelection(CString &name, int &charIndex) const{	long selStart, selEnd;	int line, column, length;	char buffer[1024];	GetSel(selStart, selEnd);	charIndex = selStart;	line = LineFromChar(selStart);	length = GetLine(line, buffer, sizeof(buffer));	column = selStart - LineIndex(line) - 1;	do {		buffer[column--] = '/0';	} while (charType[buffer[column]] == CT_WHITESPACE);	for (length = 0; length < column; length++) {		if (charType[buffer[column-length-1]] != CT_NAME) {			break;		}	}	if (length > 0) {		name = buffer + column - length;		return true;	}	return false;}

void CPropTreeItemFileEdit::OnInsertFile(){	CFileDialog dlg(TRUE);	dlg.m_ofn.Flags |= OFN_FILEMUSTEXIST;	int startSel, endSel;	GetSel(startSel, endSel);	if (dlg.DoModal()== IDOK) {		idStr currentText = (char *)GetItemValue();		idStr newText = currentText.Left(startSel) + currentText.Right(currentText.Length() - endSel);		idStr filename = fileSystem->OSPathToRelativePath(dlg.m_ofn.lpstrFile);		filename.BackSlashesToSlashes();		newText.Insert(filename, startSel);		SetItemValue((LPARAM)newText.c_str());		m_pProp->RefreshItems(this);		m_pProp->SendNotify(PTN_ITEMCHANGED, this);	}}

void CTitleTimeEdit::KeyInDel(){    int nCharPos = CharFromPos(GetCaretPos());    int nSelStart	= 0;    int nSelEnd		= 0;    GetSel(nSelStart, nSelEnd);    if(nSelStart == nSelEnd)    {        if(nCharPos < 12)        {            m_szTimeChar[nCharPos] = s_szDefTMChar[nCharPos];            nCharPos ++;            if(s_szDefTMChar[nCharPos] != '0')                nCharPos ++;        }    }    else    {        DeleteRange(nSelStart, nSelEnd);    }    Update();    SetSel(nCharPos, nCharPos);}

LRESULT ChatCtrl::OnRButtonDown(POINT pt) {	selectedLine = LineFromPos(pt);	selectedUser.clear();	selectedIP.clear();	// Po kliku dovnitr oznaceneho textu si zkusime poznamenat pripadnej nick ci ip...	// jinak by nam to neuznalo napriklad druhej klik na uz oznaceny nick =)	long lSelBegin = 0, lSelEnd = 0;	GetSel(lSelBegin, lSelEnd);	int iCharPos = CharFromPos(pt), iBegin = 0, iEnd = 0;	if((lSelEnd > lSelBegin) && (iCharPos >= lSelBegin) && (iCharPos <= lSelEnd)) {		if(!HitIP(pt, selectedIP, iBegin, iEnd))			HitNick(pt, selectedUser, iBegin, iEnd);		return 1;	}	// hightlight IP or nick when clicking on it	if(HitIP(pt, selectedIP, iBegin, iEnd) || HitNick(pt, selectedUser, iBegin, iEnd)) {		SetSel(iBegin, iEnd);		InvalidateRect(NULL);	}	return 1;}

void CGuiEdit::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) {	// TODO: Add your message handler code here and/or call default	if (!m_szMask.IsEmpty())	{		if (nChar == VK_DELETE) 		{			m_KeySpecial=1;			AfxCallWndProc(this, m_hWnd, WM_CHAR, ' ', 1);			return;		}		if (nChar == VK_BACK) 		{			m_KeySpecial=2;			return;		}		if(nChar == VK_RIGHT)		{			int nStartPos, nEndPos;			GetSel( nStartPos, nEndPos ); 			m_KeySpecial=3;			if (!ValSpecialKey(nStartPos,nEndPos))				SetSel(nStartPos,nStartPos);				else			{				int nNext = GetNextPos(nStartPos);				SetSel(nNext,nNext);				}			return;		}						}	CEdit::OnKeyDown(nChar, nRepCnt, nFlags);}

void CEditInt::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags){  DWORD dw = GetSel();  switch(nChar) {    case _T('+'):    case _T('-'):      if (LOWORD(dw) != 0)        return;      break;    case _T('0'):    case _T('1'):    case _T('2'):    case _T('3'):    case _T('4'):    case _T('5'):    case _T('6'):    case _T('7'):    case _T('8'):    case _T('9'):    case _T('/b'):      break;    default:      return;  }  CEdit::OnChar(nChar, nRepCnt, nFlags);}

/*================CSyntaxRichEditCtrl::ReplaceAll================*/int CSyntaxRichEditCtrl::ReplaceAll( const char *find, const char *replace, bool matchCase, bool matchWholeWords ) {	long selStart, selEnd, flags, search, length, start;	int numReplaced;	tom::ITextRange *range;	CComBSTR bstr( find );	if ( find[0] == '/0' ) {		return 0;	}	m_TextDoc->Freeze( NULL );	GetSel( selStart, selEnd );	flags = 0;	flags |= matchCase ? tom::tomMatchCase : 0;	flags |= matchWholeWords ? tom::tomMatchWord : 0;	m_TextDoc->Range( 0, GetTextLength(), &range );	search = GetTextLength();	numReplaced = 0;	while( range->FindShit( bstr, search, flags, &length ) == S_OK ) {		range->get_Start( &start );		ReplaceText( start, start + length, replace );		numReplaced++;	}	range->Release();	m_TextDoc->Unfreeze( NULL );	return numReplaced;}

void CAutoRichEditCtrl::SetSelectionBold(){	long start=0, end=0;	GetSel(start, end);		// Get the current selection	SetCharStyle(CFM_BOLD, CFE_BOLD, start, end);	// Make it bold}

LRESULT COXMaskedEdit::OnClear(WPARAM wParam, LPARAM lParam){	UNREFERENCED_PARAMETER(wParam);	UNREFERENCED_PARAMETER(lParam);	if(m_listData.GetCount()==0 || GetStyle()&ES_READONLY)	{		return CEdit::Default();	}	int nSelectionStart=0;	int nSelectionEnd=0;	GetSel(nSelectionStart, nSelectionEnd);	// Before updating, let the control do its normal thing. 	CEdit::Default();	// First do our version of the cut. 	int nDeleteCount=DeleteRange(nSelectionStart, nSelectionEnd);	// Now we update with our standard mask. 	Update(nSelectionStart);	if(nDeleteCount==0)	{		// I don't think we want to beep if no input characters were cut. 		//ValidationError();	}	return 0;}