自学教程：C++ GetLastPosition函数代码示例

//---------------------------------------------------------void CINFO_Messages::On_Copy(wxCommandEvent &WXUNUSED(event)){	if( GetStringSelection().IsEmpty() )	{		SelectAll();		Copy();		SetSelection(GetLastPosition(), GetLastPosition());	}	else	{		Copy();	}}

void wxTextCtrl::SetInsertionPointEnd(){    wxTextPos                       lPos = GetLastPosition();    //    // We must not do anything if the caret is already there because calling    // SetInsertionPoint() thaws the controls if Freeze() had been called even    // if it doesn't actually move the caret anywhere and so the simple fact of    // doing it results in horrible flicker when appending big amounts of text    // to the control in a few chunks (see DoAddText() test in the text sample)    //    if (GetInsertionPoint() == GetLastPosition())        return;    SetInsertionPoint(lPos);} // end of wxTextCtrl::SetInsertionPointEnd

void Edit::OnGoto (wxCommandEvent &WXUNUSED(event)) {  const int lastLine = LineFromPosition(GetLastPosition());  long line = wxGetNumberFromUser(wxT(""), wxT("Goto line:"), wxT("Goto Line"), 1, 1, 1000000, this);  if(line <= lastLine) {    GotoLine(line - 1);  }}

void psLinearMovement::SetSoftDRData (bool on_ground,	csVector3& pos, float yrot, iSector *sector, csVector3& vel,	csVector3& worldVel, float ang_vel){  if (colldet)    colldet->SetOnGround (on_ground);  csVector3 cur_pos;  float cur_rot;  iSector *cur_sect;  GetLastPosition (cur_pos, cur_rot, cur_sect);  if (cur_sect == sector)  {    offset_err = pos - cur_pos;    // Check for NaN conditions:    if (offset_err.x != offset_err.x) offset_err.x = 0.0f;    if (offset_err.y != offset_err.y) offset_err.y = 0.0f;    if (offset_err.z != offset_err.z) offset_err.z = 0.0f;    offset_rate = offset_err;    SetPosition (cur_pos, yrot, sector);  }  else  {    offset_rate = offset_err = csVector3 (0.0f, 0.0f ,0.0f);    SetPosition (pos, yrot, sector);  }  SetVelocity (vel);  ClearWorldVelocity ();  AddVelocity (worldVel);  csVector3 rot (0.0f, ang_vel, 0.0f);  SetAngularVelocity (rot);  lastDRUpdate = csGetTicks ();}

long luConsoleEdit::getLastPromptPos(){	long x = 0, y = 0;	long last = GetLastPosition();	if (!PositionToXY(last, &x, &y))		return 0;	return XYToPosition(0, y);}

void wxComboBox::SetInsertionPointEnd(){    // setting insertion point doesn't make sense for read only comboboxes    if ( !(GetWindowStyle() & wxCB_READONLY) )    {        wxTextPos pos = GetLastPosition();        SetInsertionPoint(pos);    }}

void psLinearMovement::GetDRData (bool& on_ground,	csVector3& pos, float& yrot, iSector*& sector, csVector3& vel,	csVector3& worldVel, float& ang_vel){  on_ground = IsOnGround ();  GetLastPosition (pos, yrot, sector);  vel = velBody;  ang_vel = angularVelocity.y;  worldVel = this->velWorld;}

void wxComboBox::SetInsertionPoint( long pos ){    wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );    if ( pos == GetLastPosition() )        pos = -1;    GtkWidget *entry = GTK_COMBO(m_widget)->entry;    gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );}

void wxTextEntry::SetInsertionPoint(long pos){    // calling DoSetSelection(-1, -1) would select everything which is not what    // we want here    if ( pos == -1 )        pos = GetLastPosition();    // be careful to call DoSetSelection() which is overridden in wxTextCtrl    // and not just SetSelection() here    DoSetSelection(pos, pos);}

void PythonIOCtrl::OnUserInput(wxKeyEvent& ke){    if(ke.GetModifiers()==wxMOD_CONTROL)    {//        wxMessageBox(_T("control pressed"));//        wxMessageBox(wxString::Format(_("Key: %i"),ke.GetKeyCode()));//        if(ke.GetKeyCode()==4)//        {//            m_pyctrl->DispatchCode(GetValue()); // would need to retrieve the code control's value////            if(m_pyctrl->DispatchCode(GetValue()))////                ChangeValue(_T(""));//            return;//        }        if(ke.GetKeyCode()==5)        {            m_pyctrl->BreakCode();            return;        }    }    if(ke.GetKeyCode()==WXK_RETURN)    {        if(!ke.ShiftDown() && !ke.ControlDown())        {            if(m_line_entry_mode)            {                m_line_entry_mode=false;                SetEditable(false);                wxString line;                if(m_line_entry_point<GetLastPosition())                    line=GetRange(m_line_entry_point,GetLastPosition());                line.Replace(_T("/n"),_T("")); //will cause major problems if there is more than one line feed returned here, so we remove them (TODO: fix on server side?? server should treat buffered lines as new input without errors)                line.Replace(_T("/r"),_T(""));                line.Append(_T("/n"));                AppendText(_T("/n"));                m_pyctrl->stdin_append(line);                m_pyctrl->Continue();            }        }    }    ke.Skip();}

SharedCaretState TextFormulaNode::GetPreviousPosition(SharedCaretState& relativeState){	if (relativeState && relativeState->CheckInNode(this))	{		int pos = relativeState->GetPos();		if (pos > 0)			return SharedCaretState(new CaretState(this, pos - 1));		return parent->GetPreviousPosition(relativeState);	}		return GetLastPosition();}

	void AppendText(const wxString& text, int lineCount, const CHARFORMAT2& cf)	{		HWND hwnd = (HWND)GetHWND();		CHARRANGE range;		range.cpMin = GetLastPosition();		range.cpMax = range.cpMin;		::SendMessage(hwnd, EM_EXSETSEL, 0, (LPARAM)&range);		::SendMessage(hwnd, EM_SETCHARFORMAT, SCF_SELECTION, (LPARAM)&cf);		m_updatesCount = -2; // suppress any update event		::SendMessage(hwnd, EM_REPLACESEL, 0, (LPARAM)text.c_str());		::SendMessage(hwnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)lineCount);	}

void console::ted_log::OnLOGMessage(wxCommandEvent& evt) {   wxColour logColour;   long int startPos = GetLastPosition();   switch (evt.GetInt())   {      case    MT_INFO:         *this << rply_mark << evt.GetString() << wxT("/n");         logColour = *wxBLACK;//         logColour = *wxGREEN;         break;      case   MT_ERROR:         *this << rply_mark << evt.GetString() << wxT("/n");         logColour = *wxRED;         break;      case MT_COMMAND:         *this << cmd_mark << evt.GetString() << wxT("/n");         break;      case MT_GUIPROMPT:         *this << gui_mark; break;      case MT_GUIINPUT:         *this << evt.GetString();break;      case MT_EOL:         *this << wxT("/n"); break;      case MT_WARNING:         *this << rply_mark << evt.GetString() << wxT("/n");         logColour = *wxBLUE;         break;      case MT_CELLNAME:         *this << rply_mark << wxT(" Cell ") << evt.GetString() << wxT("/n");         break;      case MT_DESIGNNAME:         *this << rply_mark << wxT(" Design ") << evt.GetString() << wxT("/n");         break;      default:         assert(false);/*wxLogTextCtrl::DoLog(evt.GetInt(), evt.GetString(), evt.GetExtraLong());*/   }      long int endPos = GetLastPosition();   SetStyle(startPos,endPos,wxTextAttr(logColour));}

bool CHttpRanges::GetTotalRange(CHttpRange& range) const{  if (m_ranges.empty())    return false;  uint64_t firstPosition, lastPosition;  if (!GetFirstPosition(firstPosition) || !GetLastPosition(lastPosition))    return false;  range.SetFirstPosition(firstPosition);  range.SetLastPosition(lastPosition);  return range.IsValid();}

void moLogTextCtrl::LogError( moText p_message ) {    wxString  w = moText2Wx( p_message );    if (GetNumberOfLines()>10000) {        Clear();    }    SetDefaultStyle( wxTextAttr( wxColour(255,0,0) ) );    AppendText(w + wxT("/n"));    ShowPosition( GetLastPosition() );}

void Edit::OnFindReplaceDialog(wxFindDialogEvent& event){  const wxEventType type = event.GetEventType();  const wxString find_string = m_FindData.GetFindString();  int found_start, found_end;  if (type == wxEVT_FIND || type == wxEVT_FIND_NEXT) {    // search    if (FindText(found_start, found_end, type == wxEVT_FIND_NEXT)) {      SetSelection(found_start, found_end);    }    else {      wxMessageDialog dialog(this, wxT("Cannot find the text /"" + find_string + "/" from current position"), wxT("Find"));      dialog.ShowModal();    }  }  else if (type == wxEVT_FIND_REPLACE) {    ReplaceText(find_string);  }  else if (type == wxEVT_FIND_REPLACE_ALL) {    const wxString replace_string = m_FindData.GetReplaceString();    int start_index = 0;    bool found = true;    int found_count = 0;    do {      // set search area      SetTargetStart(start_index); SetTargetEnd(GetLastPosition());      // search and replace      found_start = SearchInTarget(find_string);      if (found_start > -1) {        found_end = found_start + find_string.size();        SetTargetStart(found_start);        SetTargetEnd(found_end);        ReplaceTarget(replace_string);        start_index = found_start + replace_string.size();        found_count++;      }      else {        found = false;      }    }    while (found);    const wxString message = wxString::Format(wxT("%d occurrence(s) of /"%s/" were replaced with /"%s/"."),       found_count, find_string, replace_string);    wxMessageDialog replace_dialog(this, message, wxT("Replaced Text"));    replace_dialog.ShowModal();  }}

SharedCaretState RootFormulaNode::GetNextPosition(SharedCaretState& relativeState){	SharedCaretState res;		if (!relativeState)		res = GetFirstPosition();	else	{		int i = -1;		FormulaNode* node = relativeState->GetNode();		if (!relativeState->CheckAtLast(this))		{			if (node == this)			{				i = relativeState->GetPos();				FormulaNode* n = (*this)[i == childNodes->Count() ? i - 1 : i];				res = n->GetNextPosition(relativeState);				if (res)					return res;				if (i == childNodes->Count() - 1 && !dynamic_cast<EmptyFormulaNode*>(n))					return SharedCaretState(new CaretState(this, i + 1));			}			else				i = GetFirstLevelChildPos(node);		}		else if (node == this && parent)			res = parent->GetNextPosition(relativeState);		else			i = GetFirstLevelChildPos(node);		if (i != -1)		{					if (i + 1 < childNodes->Count())			{				FormulaNode* n = (*this)[i + 1];				res = n->GetNextPosition(relativeState);				if (!res && n->CanSetCaret())					res = SharedCaretState(new CaretState(this, i + 1));			}			else if (!IsEmptySymbol() && i == childNodes->Count() - 1 && *relativeState != *GetLastPosition())				return SharedCaretState(new CaretState(this, i + 1));		}				if (!res && parent)			return parent->GetNextPosition(relativeState);	}		return res;}

void PythonIOCtrl::LineInputRequest(){    if(!m_line_entry_mode)    {        m_line_entry_mode=true;        m_line_entry_point=GetLastPosition();        SetSelection(m_line_entry_point,m_line_entry_point);        SetEditable(true);        SetFocus();        InfoWindow::Display(_("Python Interpreter Input Requested"),                            _("An interpreter has needs keyboard input in its I/O window to proceed"), 8000);    }}

//---------------------------------------------------------void CINFO_Messages::_Add_Text(wxString Text){	int		i, n;	if( m_MaxLength <= (int)(GetLastPosition() + Text.Length()) )	{		for(i=0, n=0; i<GetNumberOfLines() && n<(int)Text.Length(); i++)		{			n	+= 1 + GetLineLength(i);		}		Remove(0, n + 1);	}	AppendText(Text);}

void wxComboBox::SetInsertionPoint( long pos ){    wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );    if ( pos == GetLastPosition() )        pos = -1;    GtkEntry *entry = NULL;#ifdef __WXGTK24__    if (!gtk_check_version(2,4,0))        entry = GTK_ENTRY( GTK_BIN(m_widget)->child );    else#endif        entry = GTK_ENTRY( GTK_COMBO(m_widget)->entry );    gtk_entry_set_position( entry, (int)pos );}

SharedCaretState CompoundFormulaNode::GetPreviousPosition(SharedCaretState& relativeState){	SharedCaretState res;		if (!relativeState)		res = GetLastPosition();	else	{		if (relativeState->CheckInNode(this))		{			int i;			FormulaNode* n;			FormulaNode* node = relativeState->GetNode();			if (!relativeState->CheckAtLast(this))			{				if (node == this)				{					i = relativeState->GetPos();					n = (*this)[i == childNodes->Count() ? i - 1 : i];					res = n->GetPreviousPosition(relativeState);					if (res)						return res;				}				else					i = GetFirstLevelChildPos(node);			}			else				i = childNodes->Count();						for (int pos = i - 1; pos >= 0; --pos)			{				n = (*this)[pos];				res = n->GetPreviousPosition();				if (res)					break;			}						if (!res)				res = SharedCaretState(new CaretState(parent, parent->GetChildPos(this)));		}	}		return res;}

SharedCaretState RootFormulaNode::GetPreviousPosition(SharedCaretState& relativeState){	SharedCaretState res;		if (!relativeState)		res = GetLastPosition();	else	{		int i;		FormulaNode* n;		FormulaNode* node = relativeState->GetNode();		if (node == this)		{			i = relativeState->GetPos();			n = (*this)[i == childNodes->Count() ? i - 1 : i];			res = n->GetPreviousPosition(relativeState);			if (res)				return res;		}		else			i = GetFirstLevelChildPos(node);				for (int pos = i - 1; pos >= 0; --pos)		{			n = (*this)[pos];			res = n->GetPreviousPosition();			if (res)				break;		}		if (!res && parent)			return parent->GetPreviousPosition(relativeState);	}		return res;}

void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event){    event.Enable(GetLastPosition() > 0);}

void wxTextCtrl::SetInsertionPointEnd(){    if ( GetInsertionPoint() != GetLastPosition() )        SetInsertionPoint(GetLastPosition());}

bool wxTextCtrlBase::EmulateKeyPress(const wxKeyEvent& event){    // we have a native implementation for Win32 and so don't need this one#ifndef __WIN32__    wxChar ch = 0;    int keycode = event.GetKeyCode();    switch ( keycode )    {        case WXK_NUMPAD0:        case WXK_NUMPAD1:        case WXK_NUMPAD2:        case WXK_NUMPAD3:        case WXK_NUMPAD4:        case WXK_NUMPAD5:        case WXK_NUMPAD6:        case WXK_NUMPAD7:        case WXK_NUMPAD8:        case WXK_NUMPAD9:            ch = (wxChar)(_T('0') + keycode - WXK_NUMPAD0);            break;        case WXK_MULTIPLY:        case WXK_NUMPAD_MULTIPLY:            ch = _T('*');            break;        case WXK_ADD:        case WXK_NUMPAD_ADD:            ch = _T('+');            break;        case WXK_SUBTRACT:        case WXK_NUMPAD_SUBTRACT:            ch = _T('-');            break;        case WXK_DECIMAL:        case WXK_NUMPAD_DECIMAL:            ch = _T('.');            break;        case WXK_DIVIDE:        case WXK_NUMPAD_DIVIDE:            ch = _T('/');            break;        case WXK_DELETE:        case WXK_NUMPAD_DELETE:            // delete the character at cursor            {                const long pos = GetInsertionPoint();                if ( pos < GetLastPosition() )                    Remove(pos, pos + 1);            }            break;        case WXK_BACK:            // delete the character before the cursor            {                const long pos = GetInsertionPoint();                if ( pos > 0 )                    Remove(pos - 1, pos);            }            break;        default:#if wxUSE_UNICODE            if ( event.GetUnicodeKey() )            {                ch = event.GetUnicodeKey();            }            else#endif            if ( keycode < 256 && keycode >= 0 && wxIsprint(keycode) )            {                // FIXME this is not going to work for non letters...                if ( !event.ShiftDown() )                {                    keycode = wxTolower(keycode);                }                ch = (wxChar)keycode;            }            else            {                ch = _T('/0');            }    }    if ( ch )    {        WriteText(ch);        return true;    }#else // __WIN32__    wxUnusedVar(event);#endif // !__WIN32__/__WIN32__    return false;//.........这里部分代码省略.........

void wxComboBox::SelectAll(){    SetSelection(0, GetLastPosition());}

void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event){    event.Enable(GetLastPosition() > 0);}