src/osx/textctrl_osx.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/textctrl_osx.cpp
   3 // Purpose:     wxTextCtrl
   4 // Author:      Stefan Csomor
   5 // Modified by: Ryan Norton (MLTE GetLineLength and GetLineText)
   6 // Created:     1998-01-01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #if wxUSE_TEXTCTRL
  15
  16 #include "wx/textctrl.h"
  17
  18 #ifndef WX_PRECOMP
  19     #include "wx/intl.h"
  20     #include "wx/app.h"
  21     #include "wx/utils.h"
  22     #include "wx/dc.h"
  23     #include "wx/button.h"
  24     #include "wx/menu.h"
  25     #include "wx/settings.h"
  26     #include "wx/msgdlg.h"
  27     #include "wx/toplevel.h"
  28 #endif
  29
  30 #ifdef __DARWIN__
  31     #include <sys/types.h>
  32     #include <sys/stat.h>
  33 #else
  34     #include <stat.h>
  35 #endif
  36
  37 #if wxUSE_STD_IOSTREAM
  38     #if wxUSE_IOSTREAMH
  39         #include <fstream.h>
  40     #else
  41         #include <fstream>
  42     #endif
  43 #endif
  44
  45 #include "wx/filefn.h"
  46 #include "wx/sysopt.h"
  47 #include "wx/thread.h"
  48
  49 #include "wx/osx/private.h"
  50
  51 BEGIN_EVENT_TABLE(wxTextCtrl, wxTextCtrlBase)
  52     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  53     EVT_CHAR(wxTextCtrl::OnChar)
  54     EVT_KEY_DOWN(wxTextCtrl::OnKeyDown)
  55     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
  56     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
  57     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
  58     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
  59     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
  60     EVT_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
  61     EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)
  62
  63     EVT_CONTEXT_MENU(wxTextCtrl::OnContextMenu)
  64
  65     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
  66     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
  67     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
  68     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
  69     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
  70     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
  71     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
  72 END_EVENT_TABLE()
  73
  74
  75 void wxTextCtrl::Init()
  76 {
  77     m_dirty = false;
  78
  79     m_privateContextMenu = NULL;
  80 }
  81
  82 wxTextCtrl::~wxTextCtrl()
  83 {
  84 #if wxUSE_MENUS
  85     delete m_privateContextMenu;
  86 #endif
  87 }
  88
  89 bool wxTextCtrl::Create( wxWindow *parent,
  90     wxWindowID id,
  91     const wxString& str,
  92     const wxPoint& pos,
  93     const wxSize& size,
  94     long style,
  95     const wxValidator& validator,
  96     const wxString& name )
  97 {
  98     DontCreatePeer();
  99     m_editable = true ;
 100
 101     if ( ! (style & wxNO_BORDER) )
 102         style = (style & ~wxBORDER_MASK) | wxSUNKEN_BORDER ;
 103
 104     if ( !wxTextCtrlBase::Create( parent, id, pos, size, style & ~(wxHSCROLL | wxVSCROLL), validator, name ) )
 105         return false;
 106
 107     if ( m_windowStyle & wxTE_MULTILINE )
 108     {
 109         // always turn on this style for multi-line controls
 110         m_windowStyle |= wxTE_PROCESS_ENTER;
 111         style |= wxTE_PROCESS_ENTER ;
 112     }
 113
 114
 115     SetPeer(wxWidgetImpl::CreateTextControl( this, GetParent(), GetId(), str, pos, size, style, GetExtraStyle() ));
 116
 117     MacPostControlCreate(pos, size) ;
 118
 119 #if wxOSX_USE_COCOA
 120     // under carbon everything can already be set before the MacPostControlCreate embedding takes place
 121     // but under cocoa for single line textfields this only works after everything has been set up
 122     GetTextPeer()->SetStringValue(str);
 123 #endif
 124
 125     // only now the embedding is correct and we can do a positioning update
 126
 127     MacSuperChangedPosition() ;
 128
 129     if ( m_windowStyle & wxTE_READONLY)
 130         SetEditable( false ) ;
 131
 132     SetCursor( wxCursor( wxCURSOR_IBEAM ) ) ;
 133
 134     return true;
 135 }
 136
 137 void wxTextCtrl::MacSuperChangedPosition()
 138 {
 139     wxWindow::MacSuperChangedPosition() ;
 140 #if wxOSX_USE_CARBON
 141     GetPeer()->SuperChangedPosition() ;
 142 #endif
 143 }
 144
 145 void wxTextCtrl::MacVisibilityChanged()
 146 {
 147 #if wxOSX_USE_CARBON
 148     GetPeer()->VisibilityChanged( GetPeer()->IsVisible() );
 149 #endif
 150 }
 151
 152 void wxTextCtrl::MacCheckSpelling(bool check)
 153 {
 154     GetTextPeer()->CheckSpelling(check);
 155 }
 156
 157 void wxTextCtrl::SetMaxLength(unsigned long len)
 158 {
 159     m_maxLength = len ;
 160 }
 161
 162 bool wxTextCtrl::SetFont( const wxFont& font )
 163 {
 164     if ( !wxTextCtrlBase::SetFont( font ) )
 165         return false ;
 166
 167     GetPeer()->SetFont( font , GetForegroundColour() , GetWindowStyle(), false /* dont ignore black */ ) ;
 168
 169     return true ;
 170 }
 171
 172 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
 173 {
 174     if (GetTextPeer())
 175         GetTextPeer()->SetStyle( start , end , style ) ;
 176
 177     return true ;
 178 }
 179
 180 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
 181 {
 182     wxTextCtrlBase::SetDefaultStyle( style ) ;
 183     SetStyle( -1  /*current selection*/  , -1 /*current selection*/ , GetDefaultStyle() ) ;
 184
 185     return true ;
 186 }
 187
 188 bool wxTextCtrl::IsModified() const
 189 {
 190     return m_dirty;
 191 }
 192
 193 bool wxTextCtrl::AcceptsFocus() const
 194 {
 195     // we don't want focus if we can't be edited
 196     return /*IsEditable() && */ wxControl::AcceptsFocus();
 197 }
 198
 199 wxSize wxTextCtrl::DoGetBestSize() const
 200 {
 201     if (GetTextPeer())
 202     {
 203         wxSize size = GetTextPeer()->GetBestSize();
 204         if (size.x > 0 && size.y > 0)
 205             return size;
 206     }
 207
 208     int wText, hText;
 209
 210     // these are the numbers from the HIG:
 211     // we reduce them by the borders first
 212     wText = 100 ;
 213
 214     switch ( m_windowVariant )
 215     {
 216         case wxWINDOW_VARIANT_NORMAL :
 217             hText = 22 - 6 ;
 218             break ;
 219
 220         case wxWINDOW_VARIANT_SMALL :
 221             hText = 19 - 6 ;
 222             break ;
 223
 224         case wxWINDOW_VARIANT_MINI :
 225             hText = 15 - 6 ;
 226             break ;
 227
 228         default :
 229             hText = 22 - 6;
 230             break ;
 231     }
 232
 233     // as the above numbers have some free space around the text
 234     // we get 5 lines like this anyway
 235     if ( m_windowStyle & wxTE_MULTILINE )
 236          hText *= 5 ;
 237
 238     if ( !HasFlag(wxNO_BORDER) )
 239         hText += 6 ;
 240
 241     return wxSize(wText, hText);
 242 }
 243
 244 bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
 245 {
 246     return GetTextPeer()->GetStyle(position, style);
 247 }
 248
 249 void wxTextCtrl::MarkDirty()
 250 {
 251     m_dirty = true;
 252 }
 253
 254 void wxTextCtrl::DiscardEdits()
 255 {
 256     m_dirty = false;
 257 }
 258
 259 int wxTextCtrl::GetNumberOfLines() const
 260 {
 261     return GetTextPeer()->GetNumberOfLines() ;
 262 }
 263
 264 long wxTextCtrl::XYToPosition(long x, long y) const
 265 {
 266     return GetTextPeer()->XYToPosition( x , y ) ;
 267 }
 268
 269 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 270 {
 271     return GetTextPeer()->PositionToXY( pos , x , y ) ;
 272 }
 273
 274 void wxTextCtrl::ShowPosition(long pos)
 275 {
 276     return GetTextPeer()->ShowPosition(pos) ;
 277 }
 278
 279 int wxTextCtrl::GetLineLength(long lineNo) const
 280 {
 281     return GetTextPeer()->GetLineLength(lineNo) ;
 282 }
 283
 284 wxString wxTextCtrl::GetLineText(long lineNo) const
 285 {
 286     return GetTextPeer()->GetLineText(lineNo) ;
 287 }
 288
 289 void wxTextCtrl::Copy()
 290 {
 291     if (CanCopy())
 292     {
 293         wxClipboardTextEvent evt(wxEVT_COMMAND_TEXT_COPY, GetId());
 294         evt.SetEventObject(this);
 295         if (!GetEventHandler()->ProcessEvent(evt))
 296         {
 297             wxTextEntry::Copy();
 298         }
 299     }
 300 }
 301
 302 void wxTextCtrl::Cut()
 303 {
 304     if (CanCut())
 305     {
 306         wxClipboardTextEvent evt(wxEVT_COMMAND_TEXT_CUT, GetId());
 307         evt.SetEventObject(this);
 308         if (!GetEventHandler()->ProcessEvent(evt))
 309         {
 310             wxTextEntry::Cut();
 311
 312             SendTextUpdatedEvent();
 313         }
 314     }
 315 }
 316
 317 void wxTextCtrl::Paste()
 318 {
 319     if (CanPaste())
 320     {
 321         wxClipboardTextEvent evt(wxEVT_COMMAND_TEXT_PASTE, GetId());
 322         evt.SetEventObject(this);
 323         if (!GetEventHandler()->ProcessEvent(evt))
 324         {
 325             wxTextEntry::Paste();
 326
 327             // TODO: eventually we should add setting the default style again
 328             SendTextUpdatedEvent();
 329         }
 330     }
 331 }
 332
 333 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 334 {
 335     // By default, load the first file into the text window.
 336     if (event.GetNumberOfFiles() > 0)
 337         LoadFile( event.GetFiles()[0] );
 338 }
 339
 340 void wxTextCtrl::OnKeyDown(wxKeyEvent& event)
 341 {
 342     if ( event.GetModifiers() == wxMOD_CMD )
 343     {
 344         switch( event.GetKeyCode() )
 345         {
 346             case 'A':
 347                 SelectAll();
 348                 return;
 349             case 'C':
 350                 if ( CanCopy() )
 351                     Copy() ;
 352                 return;
 353             case 'V':
 354                 if ( CanPaste() )
 355                     Paste() ;
 356                 return;
 357             case 'X':
 358                 if ( CanCut() )
 359                     Cut() ;
 360                 return;
 361             default:
 362                 break;
 363         }
 364     }
 365     // no, we didn't process it
 366     event.Skip();
 367 }
 368
 369 void wxTextCtrl::OnChar(wxKeyEvent& event)
 370 {
 371     int key = event.GetKeyCode() ;
 372     bool eat_key = false ;
 373     long from, to;
 374
 375     if ( !IsEditable() && !event.IsKeyInCategory(WXK_CATEGORY_ARROW | WXK_CATEGORY_TAB) &&
 376         !( key == WXK_RETURN && ( (m_windowStyle & wxTE_PROCESS_ENTER) || (m_windowStyle & wxTE_MULTILINE) ) )
 377 //        && key != WXK_PAGEUP && key != WXK_PAGEDOWN && key != WXK_HOME && key != WXK_END
 378         )
 379     {
 380         // eat it
 381         return ;
 382     }
 383
 384     // Check if we have reached the max # of chars (if it is set), but still
 385     // allow navigation and deletion
 386     GetSelection( &from, &to );
 387     if ( !IsMultiLine() && m_maxLength && GetValue().length() >= m_maxLength &&
 388         !event.IsKeyInCategory(WXK_CATEGORY_ARROW | WXK_CATEGORY_TAB | WXK_CATEGORY_CUT) &&
 389         !( key == WXK_RETURN && (m_windowStyle & wxTE_PROCESS_ENTER) ) &&
 390         from == to )
 391     {
 392         // eat it, we don't want to add more than allowed # of characters
 393
 394         // TODO: generate EVT_TEXT_MAXLEN()
 395         return;
 396     }
 397
 398     // assume that any key not processed yet is going to modify the control
 399     m_dirty = true;
 400
 401     switch ( key )
 402     {
 403         case WXK_RETURN:
 404             if (m_windowStyle & wxTE_PROCESS_ENTER)
 405             {
 406                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 407                 event.SetEventObject( this );
 408                 event.SetString( GetValue() );
 409                 if ( HandleWindowEvent(event) )
 410                     return;
 411             }
 412
 413             if ( !(m_windowStyle & wxTE_MULTILINE) )
 414             {
 415                 wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
 416                 if ( tlw && tlw->GetDefaultItem() )
 417                 {
 418                     wxButton *def = wxDynamicCast(tlw->GetDefaultItem(), wxButton);
 419                     if ( def && def->IsEnabled() )
 420                     {
 421                         wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, def->GetId() );
 422                         event.SetEventObject(def);
 423                         def->Command(event);
 424
 425                         return ;
 426                     }
 427                 }
 428
 429                 // this will make wxWidgets eat the ENTER key so that
 430                 // we actually prevent line wrapping in a single line text control
 431                 eat_key = true;
 432             }
 433             break;
 434
 435         case WXK_TAB:
 436             if ( !(m_windowStyle & wxTE_PROCESS_TAB))
 437             {
 438                 int flags = 0;
 439                 if (!event.ShiftDown())
 440                     flags |= wxNavigationKeyEvent::IsForward ;
 441                 if (event.ControlDown())
 442                     flags |= wxNavigationKeyEvent::WinChange ;
 443                 Navigate(flags);
 444
 445                 return;
 446             }
 447             else
 448             {
 449                 // This is necessary (don't know why);
 450                 // otherwise the tab will not be inserted.
 451                 WriteText(wxT("\t"));
 452                 eat_key = true;
 453             }
 454             break;
 455
 456         default:
 457             break;
 458     }
 459
 460     if (!eat_key)
 461     {
 462         // perform keystroke handling
 463         event.Skip(true) ;
 464     }
 465
 466     // osx_cocoa sends its event upon insertText
 467 #if wxOSX_USE_CARBON
 468     if ( ( key >= 0x20 && key < WXK_START ) ||
 469          ( key >= WXK_NUMPAD0 && key <= WXK_DIVIDE ) ||
 470          key == WXK_RETURN ||
 471          key == WXK_DELETE ||
 472          key == WXK_BACK)
 473     {
 474         wxCommandEvent event1(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
 475         event1.SetEventObject( this );
 476         wxPostEvent( GetEventHandler(), event1 );
 477     }
 478 #endif
 479 }
 480
 481 void wxTextCtrl::Command(wxCommandEvent & event)
 482 {
 483     SetValue(event.GetString());
 484     ProcessCommand(event);
 485 }
 486
 487 // ----------------------------------------------------------------------------
 488 // standard handlers for standard edit menu events
 489 // ----------------------------------------------------------------------------
 490
 491 // CS: Context Menus only work with MLTE implementations or non-multiline HIViews at the moment
 492
 493 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
 494 {
 495     Cut();
 496 }
 497
 498 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
 499 {
 500     Copy();
 501 }
 502
 503 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
 504 {
 505     Paste();
 506 }
 507
 508 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
 509 {
 510     Undo();
 511 }
 512
 513 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
 514 {
 515     Redo();
 516 }
 517
 518 void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
 519 {
 520     long from, to;
 521
 522     GetSelection( &from, &to );
 523     if (from != -1 && to != -1)
 524         Remove( from, to );
 525 }
 526
 527 void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
 528 {
 529     SetSelection(-1, -1);
 530 }
 531
 532 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
 533 {
 534     event.Enable( CanCut() );
 535 }
 536
 537 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
 538 {
 539     event.Enable( CanCopy() );
 540 }
 541
 542 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
 543 {
 544     event.Enable( CanPaste() );
 545 }
 546
 547 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
 548 {
 549     event.Enable( CanUndo() );
 550 }
 551
 552 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
 553 {
 554     event.Enable( CanRedo() );
 555 }
 556
 557 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
 558 {
 559     long from, to;
 560
 561     GetSelection( &from, &to );
 562     event.Enable( from != -1 && to != -1 && from != to && IsEditable() ) ;
 563 }
 564
 565 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
 566 {
 567     event.Enable(GetLastPosition() > 0);
 568 }
 569
 570 void wxTextCtrl::OnContextMenu(wxContextMenuEvent& event)
 571 {
 572     if ( GetTextPeer()->HasOwnContextMenu() )
 573     {
 574         event.Skip() ;
 575         return ;
 576     }
 577
 578 #if wxUSE_MENUS
 579     if (m_privateContextMenu == NULL)
 580     {
 581         m_privateContextMenu = new wxMenu;
 582         m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
 583         m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
 584         m_privateContextMenu->AppendSeparator();
 585         m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
 586         m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
 587         m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
 588         m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
 589         m_privateContextMenu->AppendSeparator();
 590         m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
 591     }
 592
 593     PopupMenu(m_privateContextMenu);
 594 #endif
 595 }
 596
 597 bool wxTextCtrl::MacSetupCursor( const wxPoint& pt )
 598 {
 599     if ( !GetTextPeer()->SetupCursor( pt ) )
 600         return wxWindow::MacSetupCursor( pt ) ;
 601     else
 602         return true ;
 603 }
 604
 605 bool wxTextCtrl::SetHint(const wxString& hint)
 606 {
 607     m_hintString = hint;
 608
 609     if ( GetTextPeer() && GetTextPeer()->SetHint(hint) )
 610         return true;
 611
 612     return false;
 613 }
 614
 615 wxString wxTextCtrl::GetHint() const
 616 {
 617     return m_hintString;
 618 }
 619
 620 // ----------------------------------------------------------------------------
 621 // implementation base class
 622 // ----------------------------------------------------------------------------
 623
 624 bool wxTextWidgetImpl::GetStyle(long WXUNUSED(position),
 625                                 wxTextAttr& WXUNUSED(style))
 626 {
 627     return false;
 628 }
 629
 630 void wxTextWidgetImpl::SetStyle(long WXUNUSED(start),
 631                                 long WXUNUSED(end),
 632                                 const wxTextAttr& WXUNUSED(style))
 633 {
 634 }
 635
 636 void wxTextWidgetImpl::Copy()
 637 {
 638 }
 639
 640 void wxTextWidgetImpl::Cut()
 641 {
 642 }
 643
 644 void wxTextWidgetImpl::Paste()
 645 {
 646 }
 647
 648 bool wxTextWidgetImpl::CanPaste() const
 649 {
 650     return false ;
 651 }
 652
 653 void wxTextWidgetImpl::SetEditable(bool WXUNUSED(editable))
 654 {
 655 }
 656
 657 long wxTextWidgetImpl::GetLastPosition() const
 658 {
 659     return GetStringValue().length() ;
 660 }
 661
 662 void wxTextWidgetImpl::Replace( long from , long to , const wxString &val )
 663 {
 664     SetSelection( from , to ) ;
 665     WriteText( val ) ;
 666 }
 667
 668 void wxTextWidgetImpl::Remove( long from , long to )
 669 {
 670     SetSelection( from , to ) ;
 671     WriteText( wxEmptyString) ;
 672 }
 673
 674 void wxTextWidgetImpl::Clear()
 675 {
 676     SetStringValue( wxEmptyString ) ;
 677 }
 678
 679 bool wxTextWidgetImpl::CanUndo() const
 680 {
 681     return false ;
 682 }
 683
 684 void wxTextWidgetImpl::Undo()
 685 {
 686 }
 687
 688 bool wxTextWidgetImpl::CanRedo()  const
 689 {
 690     return false ;
 691 }
 692
 693 void wxTextWidgetImpl::Redo()
 694 {
 695 }
 696
 697 long wxTextWidgetImpl::XYToPosition(long WXUNUSED(x), long WXUNUSED(y)) const
 698 {
 699     return 0 ;
 700 }
 701
 702 bool wxTextWidgetImpl::PositionToXY(long WXUNUSED(pos),
 703                                     long *WXUNUSED(x),
 704                                     long *WXUNUSED(y)) const
 705 {
 706     return false ;
 707 }
 708
 709 void wxTextWidgetImpl::ShowPosition( long WXUNUSED(pos) )
 710 {
 711 }
 712
 713 int wxTextWidgetImpl::GetNumberOfLines() const
 714 {
 715     wxString content = GetStringValue() ;
 716     ItemCount lines = 1;
 717
 718     for (size_t i = 0; i < content.length() ; i++)
 719     {
 720 #if wxOSX_USE_COCOA
 721         if (content[i] == '\n')
 722 #else
 723         if (content[i] == '\r')
 724 #endif
 725             lines++;
 726     }
 727
 728     return lines ;
 729 }
 730
 731 wxString wxTextWidgetImpl::GetLineText(long lineNo) const
 732 {
 733     // TODO: change this if possible to reflect real lines
 734     wxString content = GetStringValue() ;
 735
 736     // Find line first
 737     int count = 0;
 738     for (size_t i = 0; i < content.length() ; i++)
 739     {
 740         if (count == lineNo)
 741         {
 742             // Add chars in line then
 743             wxString tmp;
 744
 745             for (size_t j = i; j < content.length(); j++)
 746             {
 747                 if (content[j] == '\n')
 748                     return tmp;
 749
 750                 tmp += content[j];
 751             }
 752
 753             return tmp;
 754         }
 755
 756         if (content[i] == '\n')
 757             count++;
 758     }
 759
 760     return wxEmptyString ;
 761 }
 762
 763 int wxTextWidgetImpl::GetLineLength(long lineNo) const
 764 {
 765     // TODO: change this if possible to reflect real lines
 766     wxString content = GetStringValue() ;
 767
 768     // Find line first
 769     int count = 0;
 770     for (size_t i = 0; i < content.length() ; i++)
 771     {
 772         if (count == lineNo)
 773         {
 774             // Count chars in line then
 775             count = 0;
 776             for (size_t j = i; j < content.length(); j++)
 777             {
 778                 if (content[j] == '\n')
 779                     return count;
 780
 781                 count++;
 782             }
 783
 784             return count;
 785         }
 786
 787         if (content[i] == '\n')
 788             count++;
 789     }
 790
 791     return 0 ;
 792 }
 793
 794 #endif // wxUSE_TEXTCTRL