自学教程：C++ GetEditable函数代码示例

void wxTextEntry::SetSelection(long from, long to){    // in wx convention, (-1, -1) means the entire range but GTK+ translates -1    // (or any negative number for that matter) into last position so we need    // to translate manually    if ( from == -1 && to == -1 )        from = 0;    // for compatibility with MSW, exchange from and to parameters so that the    // insertion point is set to the start of the selection and not its end as    // GTK+ does by default    gtk_editable_select_region(GetEditable(), to, from);#ifndef __WXGTK3__    // avoid reported problem with RHEL 5 GTK+ 2.10 where selection is reset by    // a clipboard callback, see #13277    if (gtk_check_version(2,12,0))    {        GtkEntry* entry = GTK_ENTRY(GetEditable());        if (to < 0)            to = entry->text_length;        entry->selection_bound = to;    }#endif}

bool GroupCell::SetEditableContent(wxString text){  if (GetEditable()) {    GetEditable()->SetValue(text);    return true;  }  else    return false;}

bool wxTextEntry::DoAutoCompleteStrings(const wxArrayString& choices){    GtkEntry* const entry = (GtkEntry*)GetEditable();    wxCHECK_MSG(GTK_IS_ENTRY(entry), false, "auto completion doesn't work with this control");    GtkListStore * const store = gtk_list_store_new(1, G_TYPE_STRING);    GtkTreeIter iter;#if defined(__INTEL_COMPILER) && 1 /* VDM auto patch */#   pragma ivdep#   pragma swp#   pragma unroll#   pragma prefetch#   if 0#       pragma simd noassert#   endif#endif /* VDM auto patch */    for ( wxArrayString::const_iterator i = choices.begin();          i != choices.end();          ++i )    {        gtk_list_store_append(store, &iter);        gtk_list_store_set(store, &iter,                           0, (const gchar *)i->utf8_str(),                           -1);    }    GtkEntryCompletion * const completion = gtk_entry_completion_new();    gtk_entry_completion_set_model(completion, GTK_TREE_MODEL(store));    gtk_entry_completion_set_text_column(completion, 0);    gtk_entry_set_completion(entry, completion);    g_object_unref(completion);    return true;}

void wxTextEntry::WriteText(const wxString& value){    GtkEditable * const edit = GetEditable();    // remove the selection if there is one and suppress the text change event    // generated by this: we only want to generate one event for this change,    // not two    {        EventsSuppressor noevents(this);        gtk_editable_delete_selection(edit);    }    // insert new text at the cursor position    gint len = gtk_editable_get_position(edit);    gtk_editable_insert_text    (        edit,        wxGTK_CONV_FONT(value, GetEditableWindow()->GetFont()),        -1,     // text: length: compute it using strlen()        &len    // will be updated to position after the text end    );    // and move cursor to the end of new text    gtk_editable_set_position(edit, len);}

void wxTextEntry::GetSelection(long *from, long *to) const{    gint start, end;    if ( gtk_editable_get_selection_bounds(GetEditable(), &start, &end) )    {        // the output must always be in order, although in GTK+ it isn't        if ( start > end )        {            gint tmp = start;            start = end;            end = tmp;        }    }    else // no selection    {        // for compatibility with MSW return the empty selection at cursor        start =        end = GetInsertionPoint();    }    if ( from )        *from = start;    if ( to )        *to = end;}

bool wxTextEntry::DoAutoCompleteStrings(const wxArrayString& choices){    GtkEntry* const entry = (GtkEntry*)GetEditable();    wxCHECK_MSG(GTK_IS_ENTRY(entry), false, "auto completion doesn't work with this control");    GtkListStore * const store = gtk_list_store_new(1, G_TYPE_STRING);    GtkTreeIter iter;    for ( wxArrayString::const_iterator i = choices.begin();          i != choices.end();          ++i )    {        gtk_list_store_append(store, &iter);        gtk_list_store_set(store, &iter,                           0, (const gchar *)i->utf8_str(),                           -1);    }    GtkEntryCompletion * const completion = gtk_entry_completion_new();    gtk_entry_completion_set_model(completion, GTK_TREE_MODEL(store));    gtk_entry_completion_set_text_column(completion, 0);    gtk_entry_set_completion(entry, completion);    g_object_unref(completion);    return true;}

wxString wxTextEntry::DoGetValue() const{    const wxGtkString value(gtk_editable_get_chars(GetEditable(), 0, -1));    return wxGTK_CONV_BACK_FONT(value,            const_cast<wxTextEntry *>(this)->GetEditableWindow()->GetFont());}

long wxTextEntry::GetLastPosition() const{    // this can't be implemented for arbitrary GtkEditable so only do it for    // GtkEntries    GtkEntry * const entry = GTK_ENTRY(GetEditable());    return entry ? entry->text_length : - 1;}

void wxTextEntry::SetMaxLength(unsigned long len){    GtkEntry* const entry = (GtkEntry*)GetEditable();    if (!GTK_IS_ENTRY(entry))        return;    gtk_entry_set_max_length(entry, len);}

void GroupCell::RemoveOutput(){  DestroyOutput();  ResetSize();  m_height = GetEditable()->GetHeight();  m_output = NULL;  m_lastInOutput = NULL;  m_appendedCells = NULL;  m_hide = false;}

long wxTextEntry::GetLastPosition() const{    // this can't be implemented for arbitrary GtkEditable so only do it for    // GtkEntries    long pos = -1;    GtkEntry* entry = (GtkEntry*)GetEditable();    if (GTK_IS_ENTRY(entry))        pos = gtk_entry_get_text_length(entry);    return pos;}

void wxTextEntry::SetSelection(long from, long to){    // in wx convention, (-1, -1) means the entire range but GTK+ translates -1    // (or any negative number for that matter) into last position so we need    // to translate manually    if ( from == -1 && to == -1 )        from = 0;    // for compatibility with MSW, exchange from and to parameters so that the    // insertion point is set to the start of the selection and not its end as    // GTK+ does by default    gtk_editable_select_region(GetEditable(), to, from);}

void GroupCell::Hide(bool hide) {  if (IsFoldable())    return;  if (m_hide == hide)    return;  else  {    if (m_hide == false) {      if ((m_groupType == GC_TYPE_TEXT) || (m_groupType == GC_TYPE_CODE))        GetEditable()->SetFirstLineOnly(true);      m_hide = true;    }    else {      if ((m_groupType == GC_TYPE_TEXT) || (m_groupType == GC_TYPE_CODE))        GetEditable()->SetFirstLineOnly(false);      m_hide = false;    }    ResetSize();    GetEditable()->ResetSize();  }}

wxString GroupCell::ToString(){  wxString str;  if (GetEditable()) {    str = m_input->ListToString();    if (m_output != NULL && !m_hide) {      MathCell *tmp = m_output;      while (tmp != NULL) {        if (tmp->ForceBreakLineHere() && str.Length()>0)          str += wxT("/n");        str += tmp->ToString();        tmp = tmp->m_nextToDraw;      }    }  }  return str;}

void wxTextEntry::SetInsertionPoint(long pos){    gtk_editable_set_position(GetEditable(), pos);}

void wxTextEntry::SetEditable(bool editable){    gtk_editable_set_editable(GetEditable(), editable);}

bool wxTextEntry::IsEditable() const{    return gtk_editable_get_editable(GetEditable()) != 0;}

//.........这里部分代码省略.........                  str << wxT("//includegraphics[width=.95//linewidth,height=.80//textheight,keepaspectratio]{")+Frame+wxT("}/n");                else                  str << wxT("/n//verb|<<GRAPHICS>>|/n");                if(i<src->Length()-1)                  str << wxT("//newframe");              }              str << wxT("//end{animateinline}");            }	    else            {              wxString file = imgDir + wxT("/") + image + wxT(".png");                            Bitmap bmp;              bmp.SetData(copy);              if (bmp.ToFile(file).x>=0)                str += wxT("//includegraphics[width=.95//linewidth,height=.80//textheight,keepaspectratio]{") +                  filename + wxT("_img/") + image + wxT("}");              else                str << wxT("/n//verb|<<GRAPHICS>>|/n");            }	  }	}        else if (tmp->GetStyle() == TS_LABEL)        {	  if(mathMode)	    str += wxT("//end{math}/n/n//begin{math}//displaystyle/n");	  else	    {	      str += wxT("/n/n//begin{math}//displaystyle/n");	      mathMode=true;	    }          str += wxT("//parbox{8ex}{//color{labelcolor}") + tmp->ToTeX() + wxT("}/n");        }	        else	  {	    if((tmp->GetStyle() == TS_DEFAULT)||(tmp->GetStyle() == TS_STRING))	      {		// We either got a bracket or a parenthesis or regular Text		// that shouldn't be displayed as math.		if((mathMode)&&(tmp->ToString().Length()>2))		  {		    str += wxT("//mbox{}");		    str += wxT("/n//end{math}/n");		    mathMode = false;		  }	      }	    else	      {		if(!mathMode)		  {		    str += wxT("/n/n//begin{math}//displaystyle/n");		    mathMode = true;		  }	      }			    str += TexEscapeOutputCell(tmp->ToTeX());	  }        tmp = tmp->m_nextToDraw;      }      if(mathMode)	{	  // Some invisible dummy content that keeps TeX happy if there really is	  // no output to display.	  str += wxT("//mbox{}");	  str += wxT("/n//end{math}/n%%%%%%%%%%%%%%%/n");	}    }  }  // TITLES, SECTIONS, SUBSECTIONS, SUBSUBSECTIONS, TEXT  else if (GetEditable() != NULL && !m_hide) {    str = GetEditable()->ListToTeX();    switch (GetEditable()->GetStyle()) {      case TS_TITLE:        str = wxT("/n//pagebreak{}/n{//Huge {//sc ") + PrepareForTeX(str) + wxT("}}/n");        str += wxT("//setcounter{section}{0}/n//setcounter{subsection}{0}/n");        str += wxT("//setcounter{figure}{0}/n/n");        break;      case TS_SECTION:        str = wxT("/n//section{") + PrepareForTeX(str) + wxT("}/n/n");        break;      case TS_SUBSECTION:        str = wxT("/n//subsection{") + PrepareForTeX(str) + wxT("}/n/n");        break;      case TS_SUBSUBSECTION:        str = wxT("/n//subsubsection{") + PrepareForTeX(str) + wxT("}/n/n");        break;      default:        if (str.StartsWith(wxT("TeX:")))          str = str.Mid(5, str.Length());        else {          str = PrepareForTeX(str);	  str = MarkDownParser.MarkDown(str);        }        break;    }  }      return str;}

void GroupCell::Draw(CellParser& parser, wxPoint point, int fontsize){  double scale = parser.GetScale();  wxDC& dc = parser.GetDC();  if (m_width == -1 || m_height == -1) {    RecalculateWidths(parser, fontsize);    RecalculateSize(parser, fontsize);  }  if (DrawThisCell(parser, point))  {    // draw a thick line for 'page break'    // and return    if (m_groupType == GC_TYPE_PAGEBREAK) {      wxRect rect = GetRect(false);      int y = rect.GetY();      wxPen pen(parser.GetColor(TS_CURSOR), 1, wxPENSTYLE_DOT);      dc.SetPen(pen);      dc.DrawLine(0, y , 10000, y);      MathCell::Draw(parser, point, fontsize);      return;    }    //    // Paint background if we have a text cell    //    if (m_groupType == GC_TYPE_TEXT) {      wxRect rect = GetRect(false);      int y = rect.GetY();      if (m_height > 0 && m_width > 0 && y>=0) {        wxBrush br(parser.GetColor(TS_TEXT_BACKGROUND));        dc.SetBrush(br);        wxPen pen(parser.GetColor(TS_TEXT_BACKGROUND));        dc.SetPen(pen);        dc.DrawRectangle(0, y , 10000, rect.GetHeight());      }    }    //    // Draw input and output    //    SetPen(parser);    wxPoint in(point);    parser.Outdated(false);    m_input->DrawList(parser, in, fontsize);    if (m_groupType == GC_TYPE_CODE && m_input->m_next)      parser.Outdated(((EditorCell *)(m_input->m_next))->ContainsChanges());    if (m_output != NULL && !m_hide) {      MathCell *tmp = m_output;      int drop = tmp->GetMaxDrop();      in.y += m_input->GetMaxDrop() + m_output->GetMaxCenter();      m_outputRect.y = in.y - m_output->GetMaxCenter();      m_outputRect.x = in.x;      while (tmp != NULL) {        if (!tmp->m_isBroken) {          tmp->m_currentPoint.x = in.x;          tmp->m_currentPoint.y = in.y;          if (tmp->DrawThisCell(parser, in))            tmp->Draw(parser, in, MAX(tmp->IsMath() ? m_mathFontSize : m_fontSize, MC_MIN_SIZE));          if (tmp->m_nextToDraw != NULL) {            if (tmp->m_nextToDraw->BreakLineHere()) {              in.x = m_indent;              in.y += drop + tmp->m_nextToDraw->GetMaxCenter();              if (tmp->m_bigSkip)                in.y += MC_LINE_SKIP;              drop = tmp->m_nextToDraw->GetMaxDrop();            } else              in.x += (tmp->GetWidth() + MC_CELL_SKIP);          }        } else {          if (tmp->m_nextToDraw != NULL && tmp->m_nextToDraw->BreakLineHere()) {            in.x = m_indent;            in.y += drop + tmp->m_nextToDraw->GetMaxCenter();            if (tmp->m_bigSkip)              in.y += MC_LINE_SKIP;            drop = tmp->m_nextToDraw->GetMaxDrop();          }        }        tmp = tmp->m_nextToDraw;      }    }    parser.Outdated(false);    MathCell *editable = GetEditable();    if (editable != NULL && editable->IsActive()) {      dc.SetPen( *(wxThePenList->FindOrCreatePen(parser.GetColor(TS_ACTIVE_CELL_BRACKET), 2, wxPENSTYLE_SOLID))); // window linux, set a pen      dc.SetBrush( *(wxTheBrushList->FindOrCreateBrush(parser.GetColor(TS_ACTIVE_CELL_BRACKET)))); //highlight c.    }    else {      dc.SetPen( *(wxThePenList->FindOrCreatePen(parser.GetColor(TS_CELL_BRACKET), 1, wxPENSTYLE_SOLID))); // window linux, set a pen      dc.SetBrush( *(wxTheBrushList->FindOrCreateBrush(parser.GetColor(TS_CELL_BRACKET)))); //highlight c.    }    if ((!m_hide) && (!m_hiddenTree)) {      dc.SetBrush(*wxTRANSPARENT_BRUSH);    }//.........这里部分代码省略.........

//.........这里部分代码省略.........  }  else if (m_groupType == GC_TYPE_IMAGE)    str << wxT("/n//vert|<<GRAPHICS>>|/n");  // CODE CELLS  else if (m_groupType == GC_TYPE_CODE) {    // Input cells    str = wxT("/n//noindent/n%%%%%%%%%%%%%%%/n")          wxT("%%% INPUT:/n")          wxT("//begin{minipage}[t]{8ex}{//color{red}//bf/n")          wxT("//begin{verbatim}/n") +          m_input->ToString(false) +          wxT("/n//end{verbatim}}/n//end{minipage}");    if (m_input->m_next!=NULL)    {      str += wxT("/n//begin{minipage}[t]{//textwidth}{//color{blue}/n//begin{verbatim}/n") +             m_input->m_next->ToString(true) +             wxT("/n//end{verbatim}}/n//end{minipage}");    }    str += wxT("/n");    if (m_output != NULL) {      str += wxT("%%% OUTPUT:/n");      // Need to define labelcolor if this is Copy as LaTeX!      if (imgCounter == NULL)        str += wxT("//definecolor{labelcolor}{RGB}{100,0,0}/n");      str += wxT("//begin{math}//displaystyle/n");      MathCell *tmp = m_output;      while (tmp != NULL) {        if (tmp->GetType() == MC_TYPE_IMAGE || tmp->GetType() == MC_TYPE_SLIDE)        {          if (imgDir != wxEmptyString)          {            MathCell *copy = tmp->Copy(false);            (*imgCounter)++;            wxString image = filename + wxString::Format(wxT("_%d.png"), *imgCounter);            wxString file = imgDir + wxT("/") + image;            Bitmap bmp;            bmp.SetData(copy);            if (!wxDirExists(imgDir))              if (!wxMkdir(imgDir))                continue;            if (bmp.ToFile(file))              str += wxT("//includegraphics[width=9cm]{") +                  filename + wxT("_img/") + image + wxT("}");          }          else            str << wxT("/n//verb|<<GRAPHICS>>|/n");        }        else if (tmp->GetStyle() == TS_LABEL)        {          if (str.Right(13) != wxT("displaystyle/n"))            str += wxT("/n//end{math}/n/n//begin{math}//displaystyle/n");          str += wxT("//parbox{8ex}{//color{labelcolor}") + tmp->ToTeX(false) + wxT("}/n");        }        else          str += tmp->ToTeX(false);        tmp = tmp->m_nextToDraw;      }      str += wxT("/n//end{math}/n%%%%%%%%%%%%%%%/n");    }  }  // TITLES, SECTIONS, SUBSECTIONS, TEXT  else if (GetEditable() != NULL && !m_hide) {    str = GetEditable()->ToTeX(true);    switch (GetEditable()->GetStyle()) {      case TS_TITLE:        str = wxT("/n//pagebreak{}/n{//Huge {//sc ") + PrepareForTeX(str) + wxT("}}/n");        str += wxT("//setcounter{section}{0}/n//setcounter{subsection}{0}/n");        str += wxT("//setcounter{figure}{0}/n/n");        break;      case TS_SECTION:        str = wxT("/n//section{") + PrepareForTeX(str) + wxT("}/n/n");        break;      case TS_SUBSECTION:        str = wxT("/n//subsection{") + PrepareForTeX(str) + wxT("}/n/n");        break;      default:        if (str.StartsWith(wxT("TeX:")))          str = str.Mid(5, str.Length());        else {          str = PrepareForTeX(str);        }        break;    }  }  return str + MathCell::ToTeX(all);}

long wxTextEntry::GetInsertionPoint() const{    return gtk_editable_get_position(GetEditable());}

void wxTextEntry::Paste(){    gtk_editable_paste_clipboard(GetEditable());}

void wxTextEntry::Cut(){    gtk_editable_cut_clipboard(GetEditable());}

void wxTextEntry::Copy(){    gtk_editable_copy_clipboard(GetEditable());}

void wxTextEntry::Remove(long from, long to){    gtk_editable_delete_text(GetEditable(), from, to);}