src/msw/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/textctrl.cpp
   3 // Purpose:     wxTextCtrl
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 #ifdef __GNUG__
  17     #pragma implementation "textctrl.h"
  18 #endif
  19
  20 // ----------------------------------------------------------------------------
  21 // headers
  22 // ----------------------------------------------------------------------------
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #if wxUSE_TEXTCTRL
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/textctrl.h"
  35     #include "wx/settings.h"
  36     #include "wx/brush.h"
  37     #include "wx/utils.h"
  38     #include "wx/intl.h"
  39     #include "wx/log.h"
  40     #include "wx/app.h"
  41     #include "wx/menu.h"
  42 #endif
  43
  44 #include "wx/module.h"
  45
  46 #if wxUSE_CLIPBOARD
  47     #include "wx/clipbrd.h"
  48 #endif
  49
  50 #include "wx/textfile.h"
  51
  52 #include <windowsx.h>
  53
  54 #include "wx/msw/private.h"
  55
  56 #include <string.h>
  57 #include <stdlib.h>
  58 #include <sys/types.h>
  59
  60 #if wxUSE_RICHEDIT
  61
  62 // old mingw32 has richedit stuff directly in windows.h and doesn't have
  63 // richedit.h at all
  64 #if !defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__)
  65     #include <richedit.h>
  66 #endif
  67
  68 // old mingw32 doesn't define this
  69 #ifndef CFM_CHARSET
  70     #define CFM_CHARSET 0x08000000
  71 #endif // CFM_CHARSET
  72
  73 #ifndef CFM_BACKCOLOR
  74     #define CFM_BACKCOLOR 0x04000000
  75 #endif
  76
  77 // cygwin does not have these defined for richedit
  78 #ifndef ENM_LINK
  79     #define ENM_LINK 0x04000000
  80 #endif
  81
  82 #ifndef EM_AUTOURLDETECT
  83     #define EM_AUTOURLDETECT (WM_USER + 91)
  84 #endif
  85
  86 #ifndef EN_LINK
  87     #define EN_LINK 0x070b
  88
  89     typedef struct _enlink
  90     {
  91         NMHDR nmhdr;
  92         UINT msg;
  93         WPARAM wParam;
  94         LPARAM lParam;
  95         CHARRANGE chrg;
  96     } ENLINK;
  97 #endif // ENLINK
  98
  99 #ifndef SF_UNICODE
 100     #define SF_UNICODE 0x0010
 101 #endif
 102
 103 // Watcom C++ doesn't define this
 104 #ifndef SCF_ALL
 105     #define SCF_ALL 0x0004
 106 #endif
 107
 108 #endif // wxUSE_RICHEDIT
 109
 110 // ----------------------------------------------------------------------------
 111 // private functions
 112 // ----------------------------------------------------------------------------
 113
 114 #if wxUSE_RICHEDIT
 115
 116 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb);
 117
 118 #endif // wxUSE_RICHEDIT
 119
 120 // ----------------------------------------------------------------------------
 121 // private classes
 122 // ----------------------------------------------------------------------------
 123
 124 #if wxUSE_RICHEDIT
 125
 126 // this module initializes RichEdit DLL(s) if needed
 127 class wxRichEditModule : public wxModule
 128 {
 129 public:
 130     virtual bool OnInit();
 131     virtual void OnExit();
 132
 133     // load the richedit DLL of at least of required version
 134     static bool Load(int version = 1);
 135
 136 private:
 137     // the handles to richedit 1.0 and 2.0 (or 3.0) DLLs
 138     static HINSTANCE ms_hRichEdit[2];
 139
 140     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
 141 };
 142
 143 HINSTANCE wxRichEditModule::ms_hRichEdit[2] = { NULL, NULL };
 144
 145 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 146
 147 #endif // wxUSE_RICHEDIT
 148
 149 // ----------------------------------------------------------------------------
 150 // event tables and other macros
 151 // ----------------------------------------------------------------------------
 152
 153 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 154
 155 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 156     EVT_CHAR(wxTextCtrl::OnChar)
 157     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 158
 159 #if wxUSE_RICHEDIT
 160     EVT_RIGHT_UP(wxTextCtrl::OnRightClick)
 161 #endif
 162
 163     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 164     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 165     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 166     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 167     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 168     EVT_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
 169     EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)
 170
 171     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 172     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 173     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 174     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 175     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 176     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
 177     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
 178 #ifdef __WIN16__
 179     EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
 180 #endif
 181 END_EVENT_TABLE()
 182
 183 // ============================================================================
 184 // implementation
 185 // ============================================================================
 186
 187 // ----------------------------------------------------------------------------
 188 // creation
 189 // ----------------------------------------------------------------------------
 190
 191 void wxTextCtrl::Init()
 192 {
 193 #if wxUSE_RICHEDIT
 194     m_verRichEdit = 0;
 195 #endif // wxUSE_RICHEDIT
 196
 197     m_privateContextMenu = NULL;
 198     m_suppressNextUpdate = FALSE;
 199 }
 200
 201 wxTextCtrl::~wxTextCtrl()
 202 {
 203     if (m_privateContextMenu)
 204     {
 205         delete m_privateContextMenu;
 206         m_privateContextMenu = NULL;
 207     }
 208 }
 209
 210 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 211                         const wxString& value,
 212                         const wxPoint& pos,
 213                         const wxSize& size,
 214                         long style,
 215                         const wxValidator& validator,
 216                         const wxString& name)
 217 {
 218     // base initialization
 219     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 220         return FALSE;
 221
 222     if ( parent )
 223         parent->AddChild(this);
 224
 225     // translate wxWin style flags to MSW ones
 226     WXDWORD msStyle = MSWGetCreateWindowFlags();
 227
 228     // do create the control - either an EDIT or RICHEDIT
 229     wxString windowClass = wxT("EDIT");
 230
 231 #if wxUSE_RICHEDIT
 232     if ( m_windowStyle & wxTE_AUTO_URL )
 233     {
 234         // automatic URL detection only works in RichEdit 2.0+
 235         m_windowStyle |= wxTE_RICH2;
 236     }
 237
 238     if ( m_windowStyle & wxTE_RICH2 )
 239     {
 240         // using richedit 2.0 implies using wxTE_RICH
 241         m_windowStyle |= wxTE_RICH;
 242     }
 243
 244     // we need to load the richedit DLL before creating the rich edit control
 245     if ( m_windowStyle & wxTE_RICH )
 246     {
 247         static bool s_errorGiven = FALSE;// MT-FIXME
 248
 249         // Which version do we need? Use 1.0 by default because it is much more
 250         // like the the standard EDIT or 2.0 if explicitly requested, but use
 251         // only 2.0 in Unicode mode as 1.0 doesn't support Unicode at all
 252         //
 253         // TODO: RichEdit 3.0 is apparently capable of emulating RichEdit 1.0
 254         //       (and thus EDIT) much better than RichEdit 2.0 so we probably
 255         //       should use 3.0 if available as it is the best of both worlds -
 256         //       but as I can't test it right now I don't do it (VZ)
 257 #if wxUSE_UNICODE
 258         const int verRichEdit = 2;
 259 #else // !wxUSE_UNICODE
 260         int verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 261 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 262
 263         // only give the error msg once if the DLL can't be loaded
 264         if ( !s_errorGiven )
 265         {
 266             // try to load the RichEdit DLL (will do nothing if already done)
 267             if ( !wxRichEditModule::Load(verRichEdit) )
 268             {
 269 #if !wxUSE_UNICODE
 270                 // try another version?
 271                 verRichEdit = 3 - verRichEdit; // 1 <-> 2
 272
 273                 if ( !wxRichEditModule::Load(verRichEdit) )
 274 #endif // wxUSE_UNICODE
 275                 {
 276                     wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 277
 278                     s_errorGiven = TRUE;
 279                 }
 280             }
 281         }
 282
 283         // have we managed to load any richedit version?
 284         if ( !s_errorGiven )
 285         {
 286             m_verRichEdit = verRichEdit;
 287             if ( m_verRichEdit == 1 )
 288             {
 289                 windowClass = wxT("RICHEDIT");
 290             }
 291             else
 292             {
 293 #ifndef RICHEDIT_CLASS
 294                 wxString RICHEDIT_CLASS;
 295                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 296 #if wxUSE_UNICODE
 297                 RICHEDIT_CLASS += _T('W');
 298 #else // ANSI
 299                 RICHEDIT_CLASS += _T('A');
 300 #endif // Unicode/ANSI
 301 #endif // !RICHEDIT_CLASS
 302
 303                 windowClass = RICHEDIT_CLASS;
 304             }
 305         }
 306     }
 307 #endif // wxUSE_RICHEDIT
 308
 309     // we need to turn '\n's into "\r\n"s for the multiline controls
 310     wxString valueWin;
 311     if ( m_windowStyle & wxTE_MULTILINE )
 312     {
 313         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 314     }
 315     else // single line
 316     {
 317         valueWin = value;
 318     }
 319
 320     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 321         return FALSE;
 322
 323     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 324
 325 #if wxUSE_RICHEDIT
 326     if ( IsRich() )
 327     {
 328         // enable the events we're interested in: we want to get EN_CHANGE as
 329         // for the normal controls
 330         LPARAM mask = ENM_CHANGE;
 331
 332         if ( GetRichVersion() == 1 )
 333         {
 334             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 335             // explained in its handler
 336            mask |= ENM_MOUSEEVENTS;
 337         }
 338         else if ( m_windowStyle & wxTE_AUTO_URL )
 339         {
 340             mask |= ENM_LINK;
 341
 342             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 343         }
 344
 345         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 346     }
 347 #endif // wxUSE_RICHEDIT
 348
 349     return TRUE;
 350 }
 351
 352 // Make sure the window style (etc.) reflects the HWND style (roughly)
 353 void wxTextCtrl::AdoptAttributesFromHWND()
 354 {
 355     wxWindow::AdoptAttributesFromHWND();
 356
 357     HWND hWnd = GetHwnd();
 358     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 359
 360     // retrieve the style to see whether this is an edit or richedit ctrl
 361 #if wxUSE_RICHEDIT
 362     wxString classname = wxGetWindowClass(GetHWND());
 363
 364     if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
 365     {
 366         m_verRichEdit = 0;
 367     }
 368     else // rich edit?
 369     {
 370         wxChar c;
 371         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 372         {
 373             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 374
 375             m_verRichEdit = 0;
 376         }
 377     }
 378 #endif // wxUSE_RICHEDIT
 379
 380     if (style & ES_MULTILINE)
 381         m_windowStyle |= wxTE_MULTILINE;
 382     if (style & ES_PASSWORD)
 383         m_windowStyle |= wxTE_PASSWORD;
 384     if (style & ES_READONLY)
 385         m_windowStyle |= wxTE_READONLY;
 386     if (style & ES_WANTRETURN)
 387         m_windowStyle |= wxTE_PROCESS_ENTER;
 388     if (style & ES_CENTER)
 389         m_windowStyle |= wxTE_CENTRE;
 390     if (style & ES_RIGHT)
 391         m_windowStyle |= wxTE_RIGHT;
 392 }
 393
 394 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 395 {
 396     // default border for the text controls is the sunken one
 397     if ( (style & wxBORDER_MASK) == wxBORDER_DEFAULT )
 398     {
 399         style |= wxBORDER_SUNKEN;
 400     }
 401
 402     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 403
 404     // styles which we alaways add by default
 405     if ( style & wxTE_MULTILINE )
 406     {
 407         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 408                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 409
 410         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 411         if ( !(style & wxTE_NO_VSCROLL) )
 412         {
 413             // always adjust the vertical scrollbar automatically if we have it
 414             msStyle |= WS_VSCROLL | ES_AUTOVSCROLL;
 415
 416             // we have to use this style for the rich edit controls because
 417             // without it the vertical scrollbar never appears at all in
 418             // richedit 3.0 because of our ECO_NOHIDESEL hack (search for it)
 419             if ( style & wxTE_RICH2 )
 420             {
 421                 msStyle |= ES_DISABLENOSCROLL;
 422             }
 423         }
 424
 425         style |= wxTE_PROCESS_ENTER;
 426     }
 427     else // !multiline
 428     {
 429         // there is really no reason to not have this style for single line
 430         // text controls
 431         msStyle |= ES_AUTOHSCROLL;
 432     }
 433
 434     // styles which we add depending on the specified wxWindows styles
 435     if ( style & wxHSCROLL )
 436     {
 437         // automatically scroll the control horizontally as necessary
 438         msStyle |= WS_HSCROLL;// | ES_AUTOHSCROLL;
 439     }
 440
 441     if ( style & wxTE_READONLY )
 442         msStyle |= ES_READONLY;
 443
 444     if ( style & wxTE_PASSWORD )
 445         msStyle |= ES_PASSWORD;
 446
 447     if ( style & wxTE_NOHIDESEL )
 448         msStyle |= ES_NOHIDESEL;
 449
 450     // note that we can't do do "& wxTE_LEFT" as wxTE_LEFT == 0
 451     if ( style & wxTE_CENTRE )
 452         msStyle |= ES_CENTER;
 453     else if ( style & wxTE_RIGHT )
 454         msStyle |= ES_RIGHT;
 455     else
 456         msStyle |= ES_LEFT; // ES_LEFT if 0 as well but for consistency...
 457
 458     return msStyle;
 459 }
 460
 461 void wxTextCtrl::SetWindowStyleFlag(long style)
 462 {
 463     if ( (style & wxBORDER_MASK) == wxBORDER_DEFAULT )
 464         style |= wxBORDER_SUNKEN;
 465
 466 #if wxUSE_RICHEDIT
 467     // we have to deal with some styles separately because they can't be
 468     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 469     // using richedit-specific EM_SETOPTIONS
 470     if ( IsRich() &&
 471             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 472     {
 473         bool set = (style & wxTE_NOHIDESEL) != 0;
 474
 475         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 476                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 477     }
 478 #endif // wxUSE_RICHEDIT
 479
 480     wxControl::SetWindowStyleFlag(style);
 481 }
 482
 483 // ----------------------------------------------------------------------------
 484 // set/get the controls text
 485 // ----------------------------------------------------------------------------
 486
 487 wxString wxTextCtrl::GetValue() const
 488 {
 489     // range 0..-1 is special for GetRange() and means to retrieve all text
 490     return GetRange(0, -1);
 491 }
 492
 493 wxString wxTextCtrl::GetRange(long from, long to) const
 494 {
 495     wxString str;
 496
 497     if ( from >= to && to != -1 )
 498     {
 499         // nothing to retrieve
 500         return str;
 501     }
 502
 503 #if wxUSE_RICHEDIT
 504     if ( IsRich() )
 505     {
 506         int len = GetWindowTextLength(GetHwnd());
 507         if ( len > from )
 508         {
 509             // alloc one extra WORD as needed by the control
 510             wxChar *p = str.GetWriteBuf(++len);
 511
 512             TEXTRANGE textRange;
 513             textRange.chrg.cpMin = from;
 514             textRange.chrg.cpMax = to == -1 ? len : to;
 515             textRange.lpstrText = p;
 516
 517             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 518
 519             if ( m_verRichEdit > 1 )
 520             {
 521                 // RichEdit 2.0 uses just CR ('\r') for the newlines which is
 522                 // neither Unix nor Windows style - convert it to something
 523                 // reasonable
 524                 for ( ; *p; p++ )
 525                 {
 526                     if ( *p == _T('\r') )
 527                         *p = _T('\n');
 528                 }
 529             }
 530
 531             str.UngetWriteBuf();
 532
 533             if ( m_verRichEdit == 1 )
 534             {
 535                 // convert to the canonical form - see comment below
 536                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 537             }
 538         }
 539         //else: no text at all, leave the string empty
 540     }
 541     else
 542 #endif // wxUSE_RICHEDIT
 543     {
 544         // retrieve all text
 545         str = wxGetWindowText(GetHWND());
 546
 547         // need only a range?
 548         if ( from < to )
 549         {
 550             str = str.Mid(from, to - from);
 551         }
 552
 553         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 554         // canonical one (same one as above) for consistency with the other kinds
 555         // of controls and, more importantly, with the other ports
 556         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 557     }
 558
 559     return str;
 560 }
 561
 562 void wxTextCtrl::SetValue(const wxString& value)
 563 {
 564     // if the text is long enough, it's faster to just set it instead of first
 565     // comparing it with the old one (chances are that it will be different
 566     // anyhow, this comparison is there to avoid flicker for small single-line
 567     // edit controls mostly)
 568     if ( (value.length() > 0x400) || (value != GetValue()) )
 569     {
 570         DoWriteText(value, FALSE /* not selection only */);
 571
 572         // mark the control as being not dirty - we changed its text, not the
 573         // user
 574         DiscardEdits();
 575
 576         // for compatibility, don't move the cursor when doing SetValue()
 577         SetInsertionPoint(0);
 578     }
 579 }
 580
 581 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 582
 583 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 584 {
 585     *pcb = 0;
 586
 587     wchar_t *wbuf = (wchar_t *)buf;
 588     const wchar_t *wpc = *(const wchar_t **)dwCookie;
 589     while ( cb && *wpc )
 590     {
 591         *wbuf++ = *wpc++;
 592
 593         cb -= sizeof(wchar_t);
 594         (*pcb) += sizeof(wchar_t);
 595     }
 596
 597     *(const wchar_t **)dwCookie = wpc;
 598
 599     return 0;
 600 }
 601
 602 extern long wxEncodingToCodepage(wxFontEncoding encoding); // from utils.cpp
 603
 604 #if wxUSE_UNICODE_MSLU
 605 bool wxTextCtrl::StreamIn(const wxString& value,
 606                           wxFontEncoding WXUNUSED(encoding),
 607                           bool selectionOnly)
 608 {
 609     const wchar_t *wpc = value.c_str();
 610 #else // !wxUSE_UNICODE_MSLU
 611 bool wxTextCtrl::StreamIn(const wxString& value,
 612                           wxFontEncoding encoding,
 613                           bool selectionOnly)
 614 {
 615     // we have to use EM_STREAMIN to force richedit control 2.0+ to show any
 616     // text in the non default charset -- otherwise it thinks it knows better
 617     // than we do and always shows it in the default one
 618
 619     // first get the Windows code page for this encoding
 620     long codepage = wxEncodingToCodepage(encoding);
 621     if ( codepage == -1 )
 622     {
 623         // unknown encoding
 624         return FALSE;
 625     }
 626
 627     // next translate to Unicode using this code page
 628     int len = ::MultiByteToWideChar(codepage, 0, value, -1, NULL, 0);
 629
 630 #if wxUSE_WCHAR_T
 631     wxWCharBuffer wchBuf(len);
 632 #else
 633     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 634 #endif
 635
 636     if ( !::MultiByteToWideChar(codepage, 0, value, -1,
 637                                 (wchar_t *)(const wchar_t *)wchBuf, len) )
 638     {
 639         wxLogLastError(_T("MultiByteToWideChar"));
 640     }
 641
 642     // finally, stream it in the control
 643     const wchar_t *wpc = wchBuf;
 644 #endif // wxUSE_UNICODE_MSLU
 645
 646     EDITSTREAM eds;
 647     wxZeroMemory(eds);
 648     eds.dwCookie = (DWORD)&wpc;
 649     // the cast below is needed for broken (very) old mingw32 headers
 650     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 651
 652     // we're going to receive 2 EN_CHANGE notifications if we got any selection
 653     // (same problem as in DoWriteText())
 654     if ( selectionOnly && HasSelection() )
 655     {
 656         // so suppress one of them
 657         m_suppressNextUpdate = TRUE;
 658     }
 659
 660     if ( !::SendMessage(GetHwnd(), EM_STREAMIN,
 661                         SF_TEXT |
 662                         SF_UNICODE |
 663                         (selectionOnly ? SFF_SELECTION : 0),
 664                         (LPARAM)&eds) || eds.dwError )
 665     {
 666         wxLogLastError(_T("EM_STREAMIN"));
 667     }
 668
 669 #if !wxUSE_WCHAR_T
 670     free(wchBuf);
 671 #endif // !wxUSE_WCHAR_T
 672
 673     return TRUE;
 674 }
 675
 676 #endif // wxUSE_RICHEDIT
 677
 678 void wxTextCtrl::WriteText(const wxString& value)
 679 {
 680     DoWriteText(value);
 681 }
 682
 683 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 684 {
 685     wxString valueDos;
 686     if ( m_windowStyle & wxTE_MULTILINE )
 687         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 688     else
 689         valueDos = value;
 690
 691 #if wxUSE_RICHEDIT
 692     // there are several complications with the rich edit controls here
 693     bool done = FALSE;
 694     if ( IsRich() )
 695     {
 696         // first, ensure that the new text will be in the default style
 697         if ( !m_defaultStyle.IsDefault() )
 698         {
 699             long start, end;
 700             GetSelection(&start, &end);
 701             SetStyle(start, end, m_defaultStyle);
 702         }
 703
 704 #if wxUSE_UNICODE_MSLU
 705         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 706         // but EM_STREAMIN works
 707         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 708         {
 709            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 710         }
 711 #endif // wxUSE_UNICODE_MSLU
 712
 713 #if !wxUSE_UNICODE
 714         // next check if the text we're inserting must be shown in a non
 715         // default charset -- this only works for RichEdit > 1.0
 716         if ( GetRichVersion() > 1 )
 717         {
 718             wxFont font = m_defaultStyle.GetFont();
 719             if ( !font.Ok() )
 720                 font = GetFont();
 721
 722             if ( font.Ok() )
 723             {
 724                wxFontEncoding encoding = font.GetEncoding();
 725                if ( encoding != wxFONTENCODING_SYSTEM )
 726                {
 727                    done = StreamIn(valueDos, encoding, selectionOnly);
 728                }
 729             }
 730         }
 731 #endif // !wxUSE_UNICODE
 732     }
 733
 734     if ( !done )
 735 #endif // wxUSE_RICHEDIT
 736     {
 737         // in some cases we get 2 EN_CHANGE notifications after the SendMessage
 738         // call below which is confusing for the client code and so should be
 739         // avoided
 740         //
 741         // these cases are: (a) plain EDIT controls if EM_REPLACESEL is used
 742         // and there is a non empty selection currently and (b) rich text
 743         // controls in any case
 744         if (
 745 #if wxUSE_RICHEDIT
 746             IsRich() ||
 747 #endif // wxUSE_RICHEDIT
 748             (selectionOnly && HasSelection()) )
 749         {
 750             m_suppressNextUpdate = TRUE;
 751         }
 752
 753         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
 754                       0, (LPARAM)valueDos.c_str());
 755
 756         // OTOH, non rich text controls don't generate any events at all when
 757         // we use WM_SETTEXT -- have to emulate them here
 758         if ( !selectionOnly
 759 #if wxUSE_RICHEDIT
 760                 && !IsRich()
 761 #endif // wxUSE_RICHEDIT
 762            )
 763         {
 764             // Windows already sends an update event for single-line
 765             // controls.
 766             if ( m_windowStyle & wxTE_MULTILINE )
 767                 SendUpdateEvent();
 768         }
 769     }
 770
 771     AdjustSpaceLimit();
 772 }
 773
 774 void wxTextCtrl::AppendText(const wxString& text)
 775 {
 776     SetInsertionPointEnd();
 777
 778     WriteText(text);
 779
 780 #if wxUSE_RICHEDIT
 781     if ( IsMultiLine() && GetRichVersion() > 1 )
 782     {
 783         // setting the caret to the end and showing it simply doesn't work for
 784         // RichEdit 2.0 -- force it to still do what we want
 785         ::SendMessage(GetHwnd(), EM_LINESCROLL, 0, GetNumberOfLines());
 786     }
 787 #endif // wxUSE_RICHEDIT
 788 }
 789
 790 void wxTextCtrl::Clear()
 791 {
 792     ::SetWindowText(GetHwnd(), wxT(""));
 793
 794 #if wxUSE_RICHEDIT
 795     if ( !IsRich() )
 796 #endif // wxUSE_RICHEDIT
 797     {
 798         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
 799         // but the normal ones don't -- make Clear() behaviour consistent by
 800         // always sending this event
 801
 802         // Windows already sends an update event for single-line
 803         // controls.
 804         if ( m_windowStyle & wxTE_MULTILINE )
 805             SendUpdateEvent();
 806     }
 807 }
 808
 809 #ifdef __WIN32__
 810
 811 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 812 {
 813     SetFocus();
 814
 815     size_t lenOld = GetValue().length();
 816
 817     wxUint32 code = event.GetRawKeyCode();
 818     ::keybd_event(code, 0, 0 /* key press */, 0);
 819     ::keybd_event(code, 0, KEYEVENTF_KEYUP, 0);
 820
 821     // assume that any alphanumeric key changes the total number of characters
 822     // in the control - this should work in 99% of cases
 823     return GetValue().length() != lenOld;
 824 }
 825
 826 #endif // __WIN32__
 827
 828 // ----------------------------------------------------------------------------
 829 // Clipboard operations
 830 // ----------------------------------------------------------------------------
 831
 832 void wxTextCtrl::Copy()
 833 {
 834     if (CanCopy())
 835     {
 836         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
 837     }
 838 }
 839
 840 void wxTextCtrl::Cut()
 841 {
 842     if (CanCut())
 843     {
 844         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
 845     }
 846 }
 847
 848 void wxTextCtrl::Paste()
 849 {
 850     if (CanPaste())
 851     {
 852         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
 853     }
 854 }
 855
 856 bool wxTextCtrl::HasSelection() const
 857 {
 858     long from, to;
 859     GetSelection(&from, &to);
 860     return from != to;
 861 }
 862
 863 bool wxTextCtrl::CanCopy() const
 864 {
 865     // Can copy if there's a selection
 866     return HasSelection();
 867 }
 868
 869 bool wxTextCtrl::CanCut() const
 870 {
 871     return CanCopy() && IsEditable();
 872 }
 873
 874 bool wxTextCtrl::CanPaste() const
 875 {
 876     if ( !IsEditable() )
 877         return FALSE;
 878
 879 #if wxUSE_RICHEDIT
 880     if ( IsRich() )
 881     {
 882         UINT cf = 0; // 0 == any format
 883
 884         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
 885     }
 886 #endif // wxUSE_RICHEDIT
 887
 888     // Standard edit control: check for straight text on clipboard
 889     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 890         return FALSE;
 891
 892     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
 893     ::CloseClipboard();
 894
 895     return isTextAvailable;
 896 }
 897
 898 // ----------------------------------------------------------------------------
 899 // Accessors
 900 // ----------------------------------------------------------------------------
 901
 902 void wxTextCtrl::SetEditable(bool editable)
 903 {
 904     HWND hWnd = GetHwnd();
 905     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 906 }
 907
 908 void wxTextCtrl::SetInsertionPoint(long pos)
 909 {
 910     DoSetSelection(pos, pos);
 911 }
 912
 913 void wxTextCtrl::SetInsertionPointEnd()
 914 {
 915     long pos;
 916
 917 #if wxUSE_RICHEDIT
 918     if ( m_verRichEdit == 1 )
 919     {
 920         // we don't have to waste time calling GetLastPosition() in this case
 921         pos = -1;
 922     }
 923     else // !RichEdit 1.0
 924 #endif // wxUSE_RICHEDIT
 925     {
 926         pos = GetLastPosition();
 927     }
 928
 929     SetInsertionPoint(pos);
 930 }
 931
 932 long wxTextCtrl::GetInsertionPoint() const
 933 {
 934 #if wxUSE_RICHEDIT
 935     if ( IsRich() )
 936     {
 937         CHARRANGE range;
 938         range.cpMin = 0;
 939         range.cpMax = 0;
 940         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 941         return range.cpMin;
 942     }
 943 #endif // wxUSE_RICHEDIT
 944
 945     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 946     return Pos & 0xFFFF;
 947 }
 948
 949 long wxTextCtrl::GetLastPosition() const
 950 {
 951     int numLines = GetNumberOfLines();
 952     long posStartLastLine = XYToPosition(0, numLines - 1);
 953
 954     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
 955
 956     return posStartLastLine + lenLastLine;
 957 }
 958
 959 // If the return values from and to are the same, there is no
 960 // selection.
 961 void wxTextCtrl::GetSelection(long* from, long* to) const
 962 {
 963 #if wxUSE_RICHEDIT
 964     if ( IsRich() )
 965     {
 966         CHARRANGE charRange;
 967         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
 968
 969         *from = charRange.cpMin;
 970         *to = charRange.cpMax;
 971     }
 972     else
 973 #endif // !wxUSE_RICHEDIT
 974     {
 975         DWORD dwStart, dwEnd;
 976         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
 977
 978         *from = dwStart;
 979         *to = dwEnd;
 980     }
 981 }
 982
 983 bool wxTextCtrl::IsEditable() const
 984 {
 985     // strangely enough, we may be called before the control is created: our
 986     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
 987     // us
 988     if ( !m_hWnd )
 989         return TRUE;
 990
 991     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 992
 993     return (style & ES_READONLY) == 0;
 994 }
 995
 996 // ----------------------------------------------------------------------------
 997 // selection
 998 // ----------------------------------------------------------------------------
 999
1000 void wxTextCtrl::SetSelection(long from, long to)
1001 {
1002     // if from and to are both -1, it means (in wxWindows) that all text should
1003     // be selected - translate into Windows convention
1004     if ( (from == -1) && (to == -1) )
1005     {
1006         from = 0;
1007         to = -1;
1008     }
1009
1010     DoSetSelection(from, to);
1011 }
1012
1013 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
1014 {
1015     HWND hWnd = GetHwnd();
1016
1017 #ifdef __WIN32__
1018 #if wxUSE_RICHEDIT
1019     if ( IsRich() )
1020     {
1021         CHARRANGE range;
1022         range.cpMin = from;
1023         range.cpMax = to;
1024         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
1025     }
1026     else
1027 #endif // wxUSE_RICHEDIT
1028     {
1029         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
1030     }
1031
1032     if ( scrollCaret )
1033     {
1034 #if wxUSE_RICHEDIT
1035         // richedit 3.0 (i.e. the version living in riched20.dll distributed
1036         // with Windows 2000 and beyond) doesn't honour EM_SCROLLCARET when
1037         // emulating richedit 2.0 unless the control has focus or ECO_NOHIDESEL
1038         // option is set (but it does work ok in richedit 1.0 mode...)
1039         //
1040         // so to make it work we either need to give focus to it here which
1041         // will probably create many problems (dummy focus events; window
1042         // containing the text control being brought to foreground
1043         // unexpectedly; ...) or to temporarily set ECO_NOHIDESEL which may
1044         // create other problems too -- and in fact it does because if we turn
1045         // on/off this style while appending the text to the control, the
1046         // vertical scrollbar never appears in it even if we append tons of
1047         // text and to work around this the only solution I found was to use
1048         // ES_DISABLENOSCROLL
1049         //
1050         // this is very ugly but I don't see any other way to make this work
1051         if ( GetRichVersion() > 1 )
1052         {
1053             if ( !HasFlag(wxTE_NOHIDESEL) )
1054             {
1055                 ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1056                               ECOOP_OR, ECO_NOHIDESEL);
1057             }
1058             //else: everything is already ok
1059         }
1060 #endif // wxUSE_RICHEDIT
1061
1062         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
1063
1064 #if wxUSE_RICHEDIT
1065         // restore ECO_NOHIDESEL if we changed it
1066         if ( GetRichVersion() > 1 && !HasFlag(wxTE_NOHIDESEL) )
1067         {
1068             ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1069                           ECOOP_AND, ~ECO_NOHIDESEL);
1070         }
1071 #endif // wxUSE_RICHEDIT
1072     }
1073 #else // Win16
1074     // WPARAM is 0: selection is scrolled into view
1075     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
1076 #endif // Win32/16
1077 }
1078
1079 // ----------------------------------------------------------------------------
1080 // Editing
1081 // ----------------------------------------------------------------------------
1082
1083 void wxTextCtrl::Replace(long from, long to, const wxString& value)
1084 {
1085     // Set selection and remove it
1086     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
1087
1088     SendMessage(GetHwnd(), EM_REPLACESEL,
1089 #ifdef __WIN32__
1090                 TRUE,
1091 #else
1092                 FALSE,
1093 #endif
1094                 (LPARAM)value.c_str());
1095 }
1096
1097 void wxTextCtrl::Remove(long from, long to)
1098 {
1099     Replace(from, to, _T(""));
1100 }
1101
1102 bool wxTextCtrl::LoadFile(const wxString& file)
1103 {
1104     if ( wxTextCtrlBase::LoadFile(file) )
1105     {
1106         // update the size limit if needed
1107         AdjustSpaceLimit();
1108
1109         return TRUE;
1110     }
1111
1112     return FALSE;
1113 }
1114
1115 bool wxTextCtrl::IsModified() const
1116 {
1117     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1118 }
1119
1120 // Makes 'unmodified'
1121 void wxTextCtrl::DiscardEdits()
1122 {
1123     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
1124 }
1125
1126 int wxTextCtrl::GetNumberOfLines() const
1127 {
1128     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
1129 }
1130
1131 long wxTextCtrl::XYToPosition(long x, long y) const
1132 {
1133     // This gets the char index for the _beginning_ of this line
1134     long charIndex = SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
1135
1136     return charIndex + x;
1137 }
1138
1139 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1140 {
1141     HWND hWnd = GetHwnd();
1142
1143     // This gets the line number containing the character
1144     long lineNo;
1145 #if wxUSE_RICHEDIT
1146     if ( IsRich() )
1147     {
1148         lineNo = SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1149     }
1150     else
1151 #endif // wxUSE_RICHEDIT
1152     {
1153         lineNo = SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1154     }
1155
1156     if ( lineNo == -1 )
1157     {
1158         // no such line
1159         return FALSE;
1160     }
1161
1162     // This gets the char index for the _beginning_ of this line
1163     long charIndex = SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1164     if ( charIndex == -1 )
1165     {
1166         return FALSE;
1167     }
1168
1169     // The X position must therefore be the different between pos and charIndex
1170     if ( x )
1171         *x = pos - charIndex;
1172     if ( y )
1173         *y = lineNo;
1174
1175     return TRUE;
1176 }
1177
1178 void wxTextCtrl::ShowPosition(long pos)
1179 {
1180     HWND hWnd = GetHwnd();
1181
1182     // To scroll to a position, we pass the number of lines and characters
1183     // to scroll *by*. This means that we need to:
1184     // (1) Find the line position of the current line.
1185     // (2) Find the line position of pos.
1186     // (3) Scroll by (pos - current).
1187     // For now, ignore the horizontal scrolling.
1188
1189     // Is this where scrolling is relative to - the line containing the caret?
1190     // Or is the first visible line??? Try first visible line.
1191 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1192
1193     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1194
1195     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1196
1197     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1198
1199     if (linesToScroll != 0)
1200       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1201 }
1202
1203 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1204 {
1205     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1206 }
1207
1208 int wxTextCtrl::GetLineLength(long lineNo) const
1209 {
1210     long pos = XYToPosition(0, lineNo);
1211
1212     return GetLengthOfLineContainingPos(pos);
1213 }
1214
1215 wxString wxTextCtrl::GetLineText(long lineNo) const
1216 {
1217     size_t len = (size_t)GetLineLength(lineNo) + 1;
1218
1219     // there must be at least enough place for the length WORD in the
1220     // buffer
1221     len += sizeof(WORD);
1222
1223     wxString str;
1224     wxChar *buf = str.GetWriteBuf(len);
1225
1226     *(WORD *)buf = (WORD)len;
1227     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1228     buf[len] = 0;
1229
1230     str.UngetWriteBuf(len);
1231
1232     return str;
1233 }
1234
1235 void wxTextCtrl::SetMaxLength(unsigned long len)
1236 {
1237     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1238 }
1239
1240 // ----------------------------------------------------------------------------
1241 // Undo/redo
1242 // ----------------------------------------------------------------------------
1243
1244 void wxTextCtrl::Undo()
1245 {
1246     if (CanUndo())
1247     {
1248         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1249     }
1250 }
1251
1252 void wxTextCtrl::Redo()
1253 {
1254     if (CanRedo())
1255     {
1256         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1257         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1258     }
1259 }
1260
1261 bool wxTextCtrl::CanUndo() const
1262 {
1263     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1264 }
1265
1266 bool wxTextCtrl::CanRedo() const
1267 {
1268     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1269 }
1270
1271 // ----------------------------------------------------------------------------
1272 // implemenation details
1273 // ----------------------------------------------------------------------------
1274
1275 void wxTextCtrl::Command(wxCommandEvent & event)
1276 {
1277     SetValue(event.GetString());
1278     ProcessCommand (event);
1279 }
1280
1281 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1282 {
1283     // By default, load the first file into the text window.
1284     if (event.GetNumberOfFiles() > 0)
1285     {
1286         LoadFile(event.GetFiles()[0]);
1287     }
1288 }
1289
1290 // ----------------------------------------------------------------------------
1291 // kbd input processing
1292 // ----------------------------------------------------------------------------
1293
1294 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1295 {
1296     MSG *msg = (MSG *)pMsg;
1297
1298     // check for our special keys here: if we don't do it and the parent frame
1299     // uses them as accelerators, they wouldn't work at all, so we disable
1300     // usual preprocessing for them
1301     if ( msg->message == WM_KEYDOWN )
1302     {
1303         WORD vkey = (WORD) msg->wParam;
1304         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1305         {
1306             if ( vkey == VK_BACK )
1307                 return FALSE;
1308         }
1309         else // no Alt
1310         {
1311             // we want to process some Ctrl-foo and Shift-bar but no key
1312             // combinations without either Ctrl or Shift nor with both of them
1313             // pressed
1314             const int ctrl = wxIsCtrlDown(),
1315                       shift = wxIsShiftDown();
1316             switch ( ctrl + shift )
1317             {
1318                 default:
1319                     wxFAIL_MSG( _T("how many modifiers have we got?") );
1320                     // fall through
1321
1322                 case 0:
1323                 case 2:
1324                     break;
1325
1326                 case 1:
1327                     // either Ctrl or Shift pressed
1328                     if ( ctrl )
1329                     {
1330                         switch ( vkey )
1331                         {
1332                             case 'C':
1333                             case 'V':
1334                             case 'X':
1335                             case VK_INSERT:
1336                             case VK_DELETE:
1337                             case VK_HOME:
1338                             case VK_END:
1339                                 return FALSE;
1340                         }
1341                     }
1342                     else // Shift is pressed
1343                     {
1344                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1345                             return FALSE;
1346                     }
1347             }
1348         }
1349     }
1350
1351     return wxControl::MSWShouldPreProcessMessage(pMsg);
1352 }
1353
1354 void wxTextCtrl::OnChar(wxKeyEvent& event)
1355 {
1356     switch ( event.GetKeyCode() )
1357     {
1358         case WXK_RETURN:
1359             if ( !(m_windowStyle & wxTE_MULTILINE) )
1360             {
1361                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1362                 InitCommandEvent(event);
1363                 event.SetString(GetValue());
1364                 if ( GetEventHandler()->ProcessEvent(event) )
1365                     return;
1366             }
1367             //else: multiline controls need Enter for themselves
1368
1369             break;
1370
1371         case WXK_TAB:
1372             // always produce navigation event - even if we process TAB
1373             // ourselves the fact that we got here means that the user code
1374             // decided to skip processing of this TAB - probably to let it
1375             // do its default job.
1376             {
1377                 wxNavigationKeyEvent eventNav;
1378                 eventNav.SetDirection(!event.ShiftDown());
1379                 eventNav.SetWindowChange(event.ControlDown());
1380                 eventNav.SetEventObject(this);
1381
1382                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1383                     return;
1384             }
1385             break;
1386     }
1387
1388     // no, we didn't process it
1389     event.Skip();
1390 }
1391
1392 long wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1393 {
1394     long lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1395
1396     if ( nMsg == WM_GETDLGCODE )
1397     {
1398         // we always want the chars and the arrows: the arrows for navigation
1399         // and the chars because we want Ctrl-C to work even in a read only
1400         // control
1401         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1402
1403         if ( IsEditable() )
1404         {
1405             // we may have several different cases:
1406             // 1. normal case: both TAB and ENTER are used for dlg navigation
1407             // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1408             //    next control in the dialog
1409             // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1410             //    navigation
1411             // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to go
1412             //    to the next control
1413
1414             // the multiline edit control should always get <Return> for itself
1415             if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1416                 lDlgCode |= DLGC_WANTMESSAGE;
1417
1418             if ( HasFlag(wxTE_PROCESS_TAB) )
1419                 lDlgCode |= DLGC_WANTTAB;
1420
1421             lRc |= lDlgCode;
1422         }
1423         else // !editable
1424         {
1425             // NB: use "=", not "|=" as the base class version returns the
1426             //     same flags is this state as usual (i.e. including
1427             //     DLGC_WANTMESSAGE). This is strange (how does it work in the
1428             //     native Win32 apps?) but for now live with it.
1429             lRc = lDlgCode;
1430         }
1431     }
1432
1433     return lRc;
1434 }
1435
1436 // ----------------------------------------------------------------------------
1437 // text control event processing
1438 // ----------------------------------------------------------------------------
1439
1440 bool wxTextCtrl::SendUpdateEvent()
1441 {
1442     // is event reporting suspended?
1443     if ( m_suppressNextUpdate )
1444     {
1445         // do process the next one
1446         m_suppressNextUpdate = FALSE;
1447
1448         return FALSE;
1449     }
1450
1451     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1452     InitCommandEvent(event);
1453     event.SetString(GetValue());
1454
1455     return ProcessCommand(event);
1456 }
1457
1458 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1459 {
1460     switch ( param )
1461     {
1462         case EN_SETFOCUS:
1463         case EN_KILLFOCUS:
1464             {
1465                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1466                                                          : wxEVT_SET_FOCUS,
1467                                    m_windowId);
1468                 event.SetEventObject(this);
1469                 GetEventHandler()->ProcessEvent(event);
1470             }
1471             break;
1472
1473         case EN_CHANGE:
1474             SendUpdateEvent();
1475             break;
1476
1477         case EN_MAXTEXT:
1478             // the text size limit has been hit -- try to increase it
1479             if ( !AdjustSpaceLimit() )
1480             {
1481                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1482                 InitCommandEvent(event);
1483                 event.SetString(GetValue());
1484                 ProcessCommand(event);
1485             }
1486             break;
1487
1488             // the other edit notification messages are not processed
1489         default:
1490             return FALSE;
1491     }
1492
1493     // processed
1494     return TRUE;
1495 }
1496
1497 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1498 #if wxUSE_CTL3D
1499                                WXUINT message,
1500                                WXWPARAM wParam,
1501                                WXLPARAM lParam
1502 #else
1503                                WXUINT WXUNUSED(message),
1504                                WXWPARAM WXUNUSED(wParam),
1505                                WXLPARAM WXUNUSED(lParam)
1506 #endif
1507     )
1508 {
1509 #if wxUSE_CTL3D
1510     if ( m_useCtl3D )
1511     {
1512         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1513         return (WXHBRUSH) hbrush;
1514     }
1515 #endif // wxUSE_CTL3D
1516
1517     HDC hdc = (HDC)pDC;
1518     if (GetParent()->GetTransparentBackground())
1519         SetBkMode(hdc, TRANSPARENT);
1520     else
1521         SetBkMode(hdc, OPAQUE);
1522
1523     wxColour colBack = GetBackgroundColour();
1524
1525     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1526         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1527
1528     ::SetBkColor(hdc, wxColourToRGB(colBack));
1529     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1530
1531     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1532
1533     return (WXHBRUSH)brush->GetResourceHandle();
1534 }
1535
1536 // In WIN16, need to override normal erasing because
1537 // Ctl3D doesn't use the wxWindows background colour.
1538 #ifdef __WIN16__
1539 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1540 {
1541     wxColour col(m_backgroundColour);
1542
1543 #if wxUSE_CTL3D
1544     if (m_useCtl3D)
1545         col = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1546 #endif
1547
1548     RECT rect;
1549     ::GetClientRect(GetHwnd(), &rect);
1550
1551     COLORREF ref = wxColourToRGB(col);
1552     HBRUSH hBrush = ::CreateSolidBrush(ref);
1553     if ( !hBrush )
1554         wxLogLastError(wxT("CreateSolidBrush"));
1555
1556     HDC hdc = (HDC)event.GetDC()->GetHDC();
1557
1558     int mode = ::SetMapMode(hdc, MM_TEXT);
1559
1560     ::FillRect(hdc, &rect, hBrush);
1561     ::DeleteObject(hBrush);
1562     ::SetMapMode(hdc, mode);
1563
1564 }
1565 #endif // Win16
1566
1567 bool wxTextCtrl::AdjustSpaceLimit()
1568 {
1569 #ifndef __WIN16__
1570     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1571
1572     // HACK: we try to automatically extend the limit for the amount of text
1573     //       to allow (interactively) entering more than 64Kb of text under
1574     //       Win9x but we shouldn't reset the text limit which was previously
1575     //       set explicitly with SetMaxLength()
1576     //
1577     //       we could solve this by storing the limit we set in wxTextCtrl but
1578     //       to save space we prefer to simply test here the actual limit
1579     //       value: we consider that SetMaxLength() can only be called for
1580     //       values < 32Kb
1581     if ( limit < 0x8000 )
1582     {
1583         // we've got more text than limit set by SetMaxLength()
1584         return FALSE;
1585     }
1586
1587     unsigned int len = ::GetWindowTextLength(GetHwnd());
1588     if ( len >= limit )
1589     {
1590         limit = len + 0x8000;    // 32Kb
1591
1592 #if wxUSE_RICHEDIT
1593         if ( IsRich() )
1594         {
1595             // as a nice side effect, this also allows passing limit > 64Kb
1596             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1597         }
1598         else
1599 #endif // wxUSE_RICHEDIT
1600         {
1601             if ( limit > 0xffff )
1602             {
1603                 // this will set it to a platform-dependent maximum (much more
1604                 // than 64Kb under NT)
1605                 limit = 0;
1606             }
1607
1608             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1609         }
1610     }
1611 #endif // !Win16
1612
1613     // we changed the limit
1614     return TRUE;
1615 }
1616
1617 bool wxTextCtrl::AcceptsFocus() const
1618 {
1619     // we don't want focus if we can't be edited unless we're a multiline
1620     // control because then it might be still nice to get focus from keyboard
1621     // to be able to scroll it without mouse
1622     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
1623 }
1624
1625 wxSize wxTextCtrl::DoGetBestSize() const
1626 {
1627     int cx, cy;
1628     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1629
1630     int wText = DEFAULT_ITEM_WIDTH;
1631
1632     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1633     if ( m_windowStyle & wxTE_MULTILINE )
1634     {
1635         hText *= wxMax(GetNumberOfLines(), 5);
1636     }
1637     //else: for single line control everything is ok
1638
1639     return wxSize(wText, hText);
1640 }
1641
1642 // ----------------------------------------------------------------------------
1643 // standard handlers for standard edit menu events
1644 // ----------------------------------------------------------------------------
1645
1646 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1647 {
1648     Cut();
1649 }
1650
1651 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1652 {
1653     Copy();
1654 }
1655
1656 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1657 {
1658     Paste();
1659 }
1660
1661 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1662 {
1663     Undo();
1664 }
1665
1666 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1667 {
1668     Redo();
1669 }
1670
1671 void wxTextCtrl::OnDelete(wxCommandEvent& event)
1672 {
1673     long from, to;
1674     GetSelection(& from, & to);
1675     if (from != -1 && to != -1)
1676         Remove(from, to);
1677 }
1678
1679 void wxTextCtrl::OnSelectAll(wxCommandEvent& event)
1680 {
1681     SetSelection(-1, -1);
1682 }
1683
1684 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1685 {
1686     event.Enable( CanCut() );
1687 }
1688
1689 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1690 {
1691     event.Enable( CanCopy() );
1692 }
1693
1694 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1695 {
1696     event.Enable( CanPaste() );
1697 }
1698
1699 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1700 {
1701     event.Enable( CanUndo() );
1702 }
1703
1704 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1705 {
1706     event.Enable( CanRedo() );
1707 }
1708
1709 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
1710 {
1711     long from, to;
1712     GetSelection(& from, & to);
1713     event.Enable(from != -1 && to != -1 && from != to && IsEditable()) ;
1714 }
1715
1716 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
1717 {
1718     event.Enable(GetLastPosition() > 0);
1719 }
1720
1721 void wxTextCtrl::OnRightClick(wxMouseEvent& event)
1722 {
1723 #if wxUSE_RICHEDIT
1724     if (IsRich())
1725     {
1726         if (!m_privateContextMenu)
1727         {
1728             m_privateContextMenu = new wxMenu;
1729             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
1730             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
1731             m_privateContextMenu->AppendSeparator();
1732             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
1733             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
1734             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
1735             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
1736             m_privateContextMenu->AppendSeparator();
1737             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
1738         }
1739         PopupMenu(m_privateContextMenu, event.GetPosition());
1740         return;
1741     }
1742     else
1743 #endif
1744     event.Skip();
1745 }
1746
1747 // the rest of the file only deals with the rich edit controls
1748 #if wxUSE_RICHEDIT
1749
1750 // ----------------------------------------------------------------------------
1751 // EN_LINK processing
1752 // ----------------------------------------------------------------------------
1753
1754 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1755 {
1756     NMHDR *hdr = (NMHDR* )lParam;
1757     switch ( hdr->code )
1758     {
1759        case EN_MSGFILTER:
1760             {
1761                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
1762                 UINT msg = msgf->msg;
1763
1764                 // this is a bit crazy but richedit 1.0 sends us all mouse
1765                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
1766                 // generate the wxWin events for this message manually
1767                 //
1768                 // NB: in fact, this is still not totally correct as it does
1769                 //     send us WM_LBUTTONUP if the selection was cleared by the
1770                 //     last click -- so currently we get 2 events in this case,
1771                 //     but as I don't see any obvious way to check for this I
1772                 //     leave this code in place because it's still better than
1773                 //     not getting left up events at all
1774                 if ( msg == WM_LBUTTONUP )
1775                 {
1776                     WXUINT flags = msgf->wParam;
1777                     int x = GET_X_LPARAM(msgf->lParam),
1778                         y = GET_Y_LPARAM(msgf->lParam);
1779
1780                     HandleMouseEvent(msg, x, y, flags);
1781                 }
1782             }
1783
1784             // return TRUE to process the event (and FALSE to ignore it)
1785             return TRUE;
1786
1787         case EN_LINK:
1788             {
1789                 const ENLINK *enlink = (ENLINK *)hdr;
1790
1791                 switch ( enlink->msg )
1792                 {
1793                     case WM_SETCURSOR:
1794                         // ok, so it is hardcoded - do we really nee to
1795                         // customize it?
1796                         ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1797                         *result = TRUE;
1798                         break;
1799
1800                     case WM_MOUSEMOVE:
1801                     case WM_LBUTTONDOWN:
1802                     case WM_LBUTTONUP:
1803                     case WM_LBUTTONDBLCLK:
1804                     case WM_RBUTTONDOWN:
1805                     case WM_RBUTTONUP:
1806                     case WM_RBUTTONDBLCLK:
1807                         // send a mouse event
1808                         {
1809                             static const wxEventType eventsMouse[] =
1810                             {
1811                                 wxEVT_MOTION,
1812                                 wxEVT_LEFT_DOWN,
1813                                 wxEVT_LEFT_UP,
1814                                 wxEVT_LEFT_DCLICK,
1815                                 wxEVT_RIGHT_DOWN,
1816                                 wxEVT_RIGHT_UP,
1817                                 wxEVT_RIGHT_DCLICK,
1818                             };
1819
1820                             // the event ids are consecutive
1821                             wxMouseEvent
1822                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1823
1824                             InitMouseEvent(evtMouse,
1825                                            GET_X_LPARAM(enlink->lParam),
1826                                            GET_Y_LPARAM(enlink->lParam),
1827                                            enlink->wParam);
1828
1829                             wxTextUrlEvent event(m_windowId, evtMouse,
1830                                                  enlink->chrg.cpMin,
1831                                                  enlink->chrg.cpMax);
1832
1833                             InitCommandEvent(event);
1834
1835                             *result = ProcessCommand(event);
1836                         }
1837                         break;
1838                 }
1839             }
1840             return TRUE;
1841     }
1842
1843     // not processed, leave it to the base class
1844     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
1845 }
1846
1847 // ----------------------------------------------------------------------------
1848 // colour setting for the rich edit controls
1849 // ----------------------------------------------------------------------------
1850
1851 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1852 {
1853     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1854     {
1855         // colour didn't really change
1856         return FALSE;
1857     }
1858
1859     if ( IsRich() )
1860     {
1861         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1862         // EM_SETBKGNDCOLOR additionally
1863         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1864     }
1865
1866     return TRUE;
1867 }
1868
1869 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1870 {
1871     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1872     {
1873         // colour didn't really change
1874         return FALSE;
1875     }
1876
1877     if ( IsRich() )
1878     {
1879         // change the colour of everything
1880         CHARFORMAT cf;
1881         wxZeroMemory(cf);
1882         cf.cbSize = sizeof(cf);
1883         cf.dwMask = CFM_COLOR;
1884         cf.crTextColor = wxColourToRGB(colour);
1885         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1886     }
1887
1888     return TRUE;
1889 }
1890
1891 // ----------------------------------------------------------------------------
1892 // styling support for rich edit controls
1893 // ----------------------------------------------------------------------------
1894
1895 #if wxUSE_RICHEDIT
1896
1897 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1898 {
1899     if ( !IsRich() )
1900     {
1901         // can't do it with normal text control
1902         return FALSE;
1903     }
1904
1905     // the richedit 1.0 doesn't handle setting background colour, so don't
1906     // even try to do anything if it's the only thing we want to change
1907     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() )
1908     {
1909         // nothing to do: return TRUE if there was really nothing to do and
1910         // FALSE if we failed to set bg colour
1911         return !style.HasBackgroundColour();
1912     }
1913
1914     // order the range if needed
1915     if ( start > end )
1916     {
1917         long tmp = start;
1918         start = end;
1919         end = tmp;
1920     }
1921
1922     // we can only change the format of the selection, so select the range we
1923     // want and restore the old selection later
1924     long startOld, endOld;
1925     GetSelection(&startOld, &endOld);
1926
1927     // but do we really have to change the selection?
1928     bool changeSel = start != startOld || end != endOld;
1929
1930     if ( changeSel )
1931     {
1932         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
1933     }
1934
1935     // initialize CHARFORMAT struct
1936 #if wxUSE_RICHEDIT2
1937     CHARFORMAT2 cf;
1938 #else
1939     CHARFORMAT cf;
1940 #endif
1941
1942     wxZeroMemory(cf);
1943
1944     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
1945     // CHARFORMAT in that case
1946 #if wxUSE_RICHEDIT2
1947     if ( m_verRichEdit == 1 )
1948     {
1949         // this is the only thing the control is going to grok
1950         cf.cbSize = sizeof(CHARFORMAT);
1951     }
1952     else
1953 #endif
1954     {
1955         // CHARFORMAT or CHARFORMAT2
1956         cf.cbSize = sizeof(cf);
1957     }
1958
1959     if ( style.HasFont() )
1960     {
1961         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
1962         //     but using it doesn't seem to hurt neither so leaving it for now
1963
1964         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1965                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1966
1967         // fill in data from LOGFONT but recalculate lfHeight because we need
1968         // the real height in twips and not the negative number which
1969         // wxFillLogFont() returns (this is correct in general and works with
1970         // the Windows font mapper, but not here)
1971         LOGFONT lf;
1972         wxFillLogFont(&lf, &style.GetFont());
1973         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1974         cf.bCharSet = lf.lfCharSet;
1975         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1976         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1977
1978         // also deal with underline/italic/bold attributes: note that we must
1979         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1980         // style to allow clearing it
1981         if ( lf.lfItalic )
1982         {
1983             cf.dwEffects |= CFE_ITALIC;
1984         }
1985
1986         if ( lf.lfWeight == FW_BOLD )
1987         {
1988             cf.dwEffects |= CFE_BOLD;
1989         }
1990
1991         if ( lf.lfUnderline )
1992         {
1993             cf.dwEffects |= CFE_UNDERLINE;
1994         }
1995
1996         // strikeout fonts are not supported by wxWindows
1997     }
1998
1999     if ( style.HasTextColour() )
2000     {
2001         cf.dwMask |= CFM_COLOR;
2002         cf.crTextColor = wxColourToRGB(style.GetTextColour());
2003     }
2004
2005 #if wxUSE_RICHEDIT2
2006     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
2007     {
2008         cf.dwMask |= CFM_BACKCOLOR;
2009         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
2010     }
2011 #endif // wxUSE_RICHEDIT2
2012
2013     // do format the selection
2014     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
2015                             SCF_SELECTION, (LPARAM)&cf) != 0;
2016     if ( !ok )
2017     {
2018         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
2019     }
2020
2021     if ( changeSel )
2022     {
2023         // restore the original selection
2024         DoSetSelection(startOld, endOld, FALSE);
2025     }
2026
2027     return ok;
2028 }
2029
2030 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2031 {
2032     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2033         return FALSE;
2034
2035     // we have to do this or the style wouldn't apply for the text typed by the
2036     // user
2037     long posLast = GetLastPosition();
2038     SetStyle(posLast, posLast, m_defaultStyle);
2039
2040     return TRUE;
2041 }
2042
2043 #endif
2044
2045 // ----------------------------------------------------------------------------
2046 // wxRichEditModule
2047 // ----------------------------------------------------------------------------
2048
2049 bool wxRichEditModule::OnInit()
2050 {
2051     // don't do anything - we will load it when needed
2052     return TRUE;
2053 }
2054
2055 void wxRichEditModule::OnExit()
2056 {
2057     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2058     {
2059         if ( ms_hRichEdit[i] )
2060         {
2061             ::FreeLibrary(ms_hRichEdit[i]);
2062         }
2063     }
2064 }
2065
2066 /* static */
2067 bool wxRichEditModule::Load(int version)
2068 {
2069     // we don't support loading richedit 3.0 as I don't know how to distinguish
2070     // it from 2.0 anyhow
2071     wxCHECK_MSG( version == 1 || version == 2, FALSE,
2072                  _T("incorrect richedit control version requested") );
2073
2074     // make it the index in the array
2075     version--;
2076
2077     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
2078     {
2079         // we had already tried to load it and failed
2080         return FALSE;
2081     }
2082
2083     if ( ms_hRichEdit[version] )
2084     {
2085         // we've already got this one
2086         return TRUE;
2087     }
2088
2089     wxString dllname = version ? _T("riched20") : _T("riched32");
2090     dllname += _T(".dll");
2091
2092     ms_hRichEdit[version] = ::LoadLibrary(dllname);
2093
2094     if ( !ms_hRichEdit[version] )
2095     {
2096         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
2097
2098         ms_hRichEdit[version] = (HINSTANCE)-1;
2099
2100         return FALSE;
2101     }
2102
2103     return TRUE;
2104 }
2105
2106 #endif // wxUSE_RICHEDIT
2107
2108 #endif // wxUSE_TEXTCTRL