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
   9 // Licence:     wxWindows licence
  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 #include "wx/msw/missing.h"
  69
  70 #endif // wxUSE_RICHEDIT
  71
  72 // ----------------------------------------------------------------------------
  73 // private functions
  74 // ----------------------------------------------------------------------------
  75
  76 #if wxUSE_RICHEDIT
  77
  78 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb);
  79
  80 #endif // wxUSE_RICHEDIT
  81
  82 // ----------------------------------------------------------------------------
  83 // private classes
  84 // ----------------------------------------------------------------------------
  85
  86 #if wxUSE_RICHEDIT
  87
  88 // this module initializes RichEdit DLL(s) if needed
  89 class wxRichEditModule : public wxModule
  90 {
  91 public:
  92     virtual bool OnInit();
  93     virtual void OnExit();
  94
  95     // load the richedit DLL of at least of required version
  96     static bool Load(int version = 1);
  97
  98 private:
  99     // the handles to richedit 1.0 and 2.0 (or 3.0) DLLs
 100     static HINSTANCE ms_hRichEdit[2];
 101
 102     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
 103 };
 104
 105 HINSTANCE wxRichEditModule::ms_hRichEdit[2] = { NULL, NULL };
 106
 107 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 108
 109 #endif // wxUSE_RICHEDIT
 110
 111 // ----------------------------------------------------------------------------
 112 // event tables and other macros
 113 // ----------------------------------------------------------------------------
 114
 115 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 116
 117 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 118     EVT_CHAR(wxTextCtrl::OnChar)
 119     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 120
 121 #if wxUSE_RICHEDIT
 122     EVT_RIGHT_UP(wxTextCtrl::OnRightClick)
 123 #endif
 124
 125     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 126     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 127     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 128     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 129     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 130     EVT_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
 131     EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)
 132
 133     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 134     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 135     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 136     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 137     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 138     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
 139     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
 140 #ifdef __WIN16__
 141     EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
 142 #endif
 143 END_EVENT_TABLE()
 144
 145 // ============================================================================
 146 // implementation
 147 // ============================================================================
 148
 149 // ----------------------------------------------------------------------------
 150 // creation
 151 // ----------------------------------------------------------------------------
 152
 153 void wxTextCtrl::Init()
 154 {
 155 #if wxUSE_RICHEDIT
 156     m_verRichEdit = 0;
 157 #endif // wxUSE_RICHEDIT
 158
 159     m_privateContextMenu = NULL;
 160     m_suppressNextUpdate = FALSE;
 161 }
 162
 163 wxTextCtrl::~wxTextCtrl()
 164 {
 165     if (m_privateContextMenu)
 166     {
 167         delete m_privateContextMenu;
 168         m_privateContextMenu = NULL;
 169     }
 170 }
 171
 172 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 173                         const wxString& value,
 174                         const wxPoint& pos,
 175                         const wxSize& size,
 176                         long style,
 177                         const wxValidator& validator,
 178                         const wxString& name)
 179 {
 180     // base initialization
 181     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 182         return FALSE;
 183
 184     if ( parent )
 185         parent->AddChild(this);
 186
 187     // translate wxWin style flags to MSW ones
 188     WXDWORD msStyle = MSWGetCreateWindowFlags();
 189
 190     // do create the control - either an EDIT or RICHEDIT
 191     wxString windowClass = wxT("EDIT");
 192
 193 #if wxUSE_RICHEDIT
 194     if ( m_windowStyle & wxTE_AUTO_URL )
 195     {
 196         // automatic URL detection only works in RichEdit 2.0+
 197         m_windowStyle |= wxTE_RICH2;
 198     }
 199
 200     if ( m_windowStyle & wxTE_RICH2 )
 201     {
 202         // using richedit 2.0 implies using wxTE_RICH
 203         m_windowStyle |= wxTE_RICH;
 204     }
 205
 206     // we need to load the richedit DLL before creating the rich edit control
 207     if ( m_windowStyle & wxTE_RICH )
 208     {
 209         static bool s_errorGiven = FALSE;// MT-FIXME
 210
 211         // Which version do we need? Use 1.0 by default because it is much more
 212         // like the the standard EDIT or 2.0 if explicitly requested, but use
 213         // only 2.0 in Unicode mode as 1.0 doesn't support Unicode at all
 214         //
 215         // TODO: RichEdit 3.0 is apparently capable of emulating RichEdit 1.0
 216         //       (and thus EDIT) much better than RichEdit 2.0 so we probably
 217         //       should use 3.0 if available as it is the best of both worlds -
 218         //       but as I can't test it right now I don't do it (VZ)
 219 #if wxUSE_UNICODE
 220         const int verRichEdit = 2;
 221 #else // !wxUSE_UNICODE
 222         int verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 223 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 224
 225         // only give the error msg once if the DLL can't be loaded
 226         if ( !s_errorGiven )
 227         {
 228             // try to load the RichEdit DLL (will do nothing if already done)
 229             if ( !wxRichEditModule::Load(verRichEdit) )
 230             {
 231 #if !wxUSE_UNICODE
 232                 // try another version?
 233                 verRichEdit = 3 - verRichEdit; // 1 <-> 2
 234
 235                 if ( !wxRichEditModule::Load(verRichEdit) )
 236 #endif // wxUSE_UNICODE
 237                 {
 238                     wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 239
 240                     s_errorGiven = TRUE;
 241                 }
 242             }
 243         }
 244
 245         // have we managed to load any richedit version?
 246         if ( !s_errorGiven )
 247         {
 248             m_verRichEdit = verRichEdit;
 249             if ( m_verRichEdit == 1 )
 250             {
 251                 windowClass = wxT("RICHEDIT");
 252             }
 253             else
 254             {
 255 #ifndef RICHEDIT_CLASS
 256                 wxString RICHEDIT_CLASS;
 257                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 258 #if wxUSE_UNICODE
 259                 RICHEDIT_CLASS += _T('W');
 260 #else // ANSI
 261                 RICHEDIT_CLASS += _T('A');
 262 #endif // Unicode/ANSI
 263 #endif // !RICHEDIT_CLASS
 264
 265                 windowClass = RICHEDIT_CLASS;
 266             }
 267         }
 268     }
 269 #endif // wxUSE_RICHEDIT
 270
 271     // we need to turn '\n's into "\r\n"s for the multiline controls
 272     wxString valueWin;
 273     if ( m_windowStyle & wxTE_MULTILINE )
 274     {
 275         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 276     }
 277     else // single line
 278     {
 279         valueWin = value;
 280     }
 281
 282     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 283         return FALSE;
 284
 285     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 286
 287 #if wxUSE_RICHEDIT
 288     if ( IsRich() )
 289     {
 290         // enable the events we're interested in: we want to get EN_CHANGE as
 291         // for the normal controls
 292         LPARAM mask = ENM_CHANGE;
 293
 294         if ( GetRichVersion() == 1 )
 295         {
 296             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 297             // explained in its handler
 298            mask |= ENM_MOUSEEVENTS;
 299         }
 300         else if ( m_windowStyle & wxTE_AUTO_URL )
 301         {
 302             mask |= ENM_LINK;
 303
 304             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 305         }
 306
 307         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 308     }
 309 #endif // wxUSE_RICHEDIT
 310
 311     return TRUE;
 312 }
 313
 314 // Make sure the window style (etc.) reflects the HWND style (roughly)
 315 void wxTextCtrl::AdoptAttributesFromHWND()
 316 {
 317     wxWindow::AdoptAttributesFromHWND();
 318
 319     HWND hWnd = GetHwnd();
 320     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 321
 322     // retrieve the style to see whether this is an edit or richedit ctrl
 323 #if wxUSE_RICHEDIT
 324     wxString classname = wxGetWindowClass(GetHWND());
 325
 326     if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
 327     {
 328         m_verRichEdit = 0;
 329     }
 330     else // rich edit?
 331     {
 332         wxChar c;
 333         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 334         {
 335             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 336
 337             m_verRichEdit = 0;
 338         }
 339     }
 340 #endif // wxUSE_RICHEDIT
 341
 342     if (style & ES_MULTILINE)
 343         m_windowStyle |= wxTE_MULTILINE;
 344     if (style & ES_PASSWORD)
 345         m_windowStyle |= wxTE_PASSWORD;
 346     if (style & ES_READONLY)
 347         m_windowStyle |= wxTE_READONLY;
 348     if (style & ES_WANTRETURN)
 349         m_windowStyle |= wxTE_PROCESS_ENTER;
 350     if (style & ES_CENTER)
 351         m_windowStyle |= wxTE_CENTRE;
 352     if (style & ES_RIGHT)
 353         m_windowStyle |= wxTE_RIGHT;
 354 }
 355
 356 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 357 {
 358     // default border for the text controls is the sunken one
 359     if ( (style & wxBORDER_MASK) == wxBORDER_DEFAULT )
 360     {
 361         style |= wxBORDER_SUNKEN;
 362     }
 363
 364     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 365
 366     // styles which we alaways add by default
 367     if ( style & wxTE_MULTILINE )
 368     {
 369         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 370                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 371
 372         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 373         if ( !(style & wxTE_NO_VSCROLL) )
 374         {
 375             // always adjust the vertical scrollbar automatically if we have it
 376             msStyle |= WS_VSCROLL | ES_AUTOVSCROLL;
 377
 378 #if wxUSE_RICHEDIT
 379             // we have to use this style for the rich edit controls because
 380             // without it the vertical scrollbar never appears at all in
 381             // richedit 3.0 because of our ECO_NOHIDESEL hack (search for it)
 382             if ( style & wxTE_RICH2 )
 383             {
 384                 msStyle |= ES_DISABLENOSCROLL;
 385             }
 386 #endif // wxUSE_RICHEDIT
 387         }
 388
 389         style |= wxTE_PROCESS_ENTER;
 390     }
 391     else // !multiline
 392     {
 393         // there is really no reason to not have this style for single line
 394         // text controls
 395         msStyle |= ES_AUTOHSCROLL;
 396     }
 397
 398     // styles which we add depending on the specified wxWindows styles
 399     if ( style & wxHSCROLL )
 400     {
 401         // automatically scroll the control horizontally as necessary
 402         msStyle |= WS_HSCROLL;// | ES_AUTOHSCROLL;
 403     }
 404
 405     if ( style & wxTE_READONLY )
 406         msStyle |= ES_READONLY;
 407
 408     if ( style & wxTE_PASSWORD )
 409         msStyle |= ES_PASSWORD;
 410
 411     if ( style & wxTE_NOHIDESEL )
 412         msStyle |= ES_NOHIDESEL;
 413
 414     // note that we can't do do "& wxTE_LEFT" as wxTE_LEFT == 0
 415     if ( style & wxTE_CENTRE )
 416         msStyle |= ES_CENTER;
 417     else if ( style & wxTE_RIGHT )
 418         msStyle |= ES_RIGHT;
 419     else
 420         msStyle |= ES_LEFT; // ES_LEFT if 0 as well but for consistency...
 421
 422     return msStyle;
 423 }
 424
 425 void wxTextCtrl::SetWindowStyleFlag(long style)
 426 {
 427     if ( (style & wxBORDER_MASK) == wxBORDER_DEFAULT )
 428         style |= wxBORDER_SUNKEN;
 429
 430 #if wxUSE_RICHEDIT
 431     // we have to deal with some styles separately because they can't be
 432     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 433     // using richedit-specific EM_SETOPTIONS
 434     if ( IsRich() &&
 435             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 436     {
 437         bool set = (style & wxTE_NOHIDESEL) != 0;
 438
 439         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 440                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 441     }
 442 #endif // wxUSE_RICHEDIT
 443
 444     wxControl::SetWindowStyleFlag(style);
 445 }
 446
 447 // ----------------------------------------------------------------------------
 448 // set/get the controls text
 449 // ----------------------------------------------------------------------------
 450
 451 wxString wxTextCtrl::GetValue() const
 452 {
 453     // range 0..-1 is special for GetRange() and means to retrieve all text
 454     return GetRange(0, -1);
 455 }
 456
 457 wxString wxTextCtrl::GetRange(long from, long to) const
 458 {
 459     wxString str;
 460
 461     if ( from >= to && to != -1 )
 462     {
 463         // nothing to retrieve
 464         return str;
 465     }
 466
 467 #if wxUSE_RICHEDIT
 468     if ( IsRich() )
 469     {
 470         int len = GetWindowTextLength(GetHwnd());
 471         if ( len > from )
 472         {
 473             // alloc one extra WORD as needed by the control
 474             wxChar *p = str.GetWriteBuf(++len);
 475
 476             TEXTRANGE textRange;
 477             textRange.chrg.cpMin = from;
 478             textRange.chrg.cpMax = to == -1 ? len : to;
 479             textRange.lpstrText = p;
 480
 481             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 482
 483             if ( m_verRichEdit > 1 )
 484             {
 485                 // RichEdit 2.0 uses just CR ('\r') for the newlines which is
 486                 // neither Unix nor Windows style - convert it to something
 487                 // reasonable
 488                 for ( ; *p; p++ )
 489                 {
 490                     if ( *p == _T('\r') )
 491                         *p = _T('\n');
 492                 }
 493             }
 494
 495             str.UngetWriteBuf();
 496
 497             if ( m_verRichEdit == 1 )
 498             {
 499                 // convert to the canonical form - see comment below
 500                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 501             }
 502         }
 503         //else: no text at all, leave the string empty
 504     }
 505     else
 506 #endif // wxUSE_RICHEDIT
 507     {
 508         // retrieve all text
 509         str = wxGetWindowText(GetHWND());
 510
 511         // need only a range?
 512         if ( from < to )
 513         {
 514             str = str.Mid(from, to - from);
 515         }
 516
 517         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 518         // canonical one (same one as above) for consistency with the other kinds
 519         // of controls and, more importantly, with the other ports
 520         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 521     }
 522
 523     return str;
 524 }
 525
 526 void wxTextCtrl::SetValue(const wxString& value)
 527 {
 528     // if the text is long enough, it's faster to just set it instead of first
 529     // comparing it with the old one (chances are that it will be different
 530     // anyhow, this comparison is there to avoid flicker for small single-line
 531     // edit controls mostly)
 532     if ( (value.length() > 0x400) || (value != GetValue()) )
 533     {
 534         DoWriteText(value, FALSE /* not selection only */);
 535     }
 536
 537     // we should reset the modified flag even if the value didn't really change
 538
 539     // mark the control as being not dirty - we changed its text, not the
 540     // user
 541     DiscardEdits();
 542
 543     // for compatibility, don't move the cursor when doing SetValue()
 544     SetInsertionPoint(0);
 545 }
 546
 547 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 548
 549 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 550 {
 551     *pcb = 0;
 552
 553     wchar_t *wbuf = (wchar_t *)buf;
 554     const wchar_t *wpc = *(const wchar_t **)dwCookie;
 555     while ( cb && *wpc )
 556     {
 557         *wbuf++ = *wpc++;
 558
 559         cb -= sizeof(wchar_t);
 560         (*pcb) += sizeof(wchar_t);
 561     }
 562
 563     *(const wchar_t **)dwCookie = wpc;
 564
 565     return 0;
 566 }
 567
 568 extern long wxEncodingToCodepage(wxFontEncoding encoding); // from utils.cpp
 569
 570 #if wxUSE_UNICODE_MSLU
 571 bool wxTextCtrl::StreamIn(const wxString& value,
 572                           wxFontEncoding WXUNUSED(encoding),
 573                           bool selectionOnly)
 574 {
 575     const wchar_t *wpc = value.c_str();
 576 #else // !wxUSE_UNICODE_MSLU
 577 bool wxTextCtrl::StreamIn(const wxString& value,
 578                           wxFontEncoding encoding,
 579                           bool selectionOnly)
 580 {
 581     // we have to use EM_STREAMIN to force richedit control 2.0+ to show any
 582     // text in the non default charset -- otherwise it thinks it knows better
 583     // than we do and always shows it in the default one
 584
 585     // first get the Windows code page for this encoding
 586     long codepage = wxEncodingToCodepage(encoding);
 587     if ( codepage == -1 )
 588     {
 589         // unknown encoding
 590         return FALSE;
 591     }
 592
 593     // next translate to Unicode using this code page
 594     int len = ::MultiByteToWideChar(codepage, 0, value, -1, NULL, 0);
 595
 596 #if wxUSE_WCHAR_T
 597     wxWCharBuffer wchBuf(len);
 598 #else
 599     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 600 #endif
 601
 602     if ( !::MultiByteToWideChar(codepage, 0, value, -1,
 603                                 (wchar_t *)(const wchar_t *)wchBuf, len) )
 604     {
 605         wxLogLastError(_T("MultiByteToWideChar"));
 606     }
 607
 608     // finally, stream it in the control
 609     const wchar_t *wpc = wchBuf;
 610 #endif // wxUSE_UNICODE_MSLU
 611
 612     EDITSTREAM eds;
 613     wxZeroMemory(eds);
 614     eds.dwCookie = (DWORD)&wpc;
 615     // the cast below is needed for broken (very) old mingw32 headers
 616     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 617
 618     // we're going to receive 2 EN_CHANGE notifications if we got any selection
 619     // (same problem as in DoWriteText())
 620     if ( selectionOnly && HasSelection() )
 621     {
 622         // so suppress one of them
 623         m_suppressNextUpdate = TRUE;
 624     }
 625
 626     ::SendMessage(GetHwnd(), EM_STREAMIN,
 627                   SF_TEXT |
 628                   SF_UNICODE |
 629                   (selectionOnly ? SFF_SELECTION : 0),
 630                   (LPARAM)&eds);
 631
 632     if ( eds.dwError )
 633     {
 634         wxLogLastError(_T("EM_STREAMIN"));
 635     }
 636
 637 #if !wxUSE_WCHAR_T
 638     free(wchBuf);
 639 #endif // !wxUSE_WCHAR_T
 640
 641     return TRUE;
 642 }
 643
 644 #endif // wxUSE_RICHEDIT
 645
 646 void wxTextCtrl::WriteText(const wxString& value)
 647 {
 648     DoWriteText(value);
 649 }
 650
 651 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 652 {
 653     wxString valueDos;
 654     if ( m_windowStyle & wxTE_MULTILINE )
 655         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 656     else
 657         valueDos = value;
 658
 659 #if wxUSE_RICHEDIT
 660     // there are several complications with the rich edit controls here
 661     bool done = FALSE;
 662     if ( IsRich() )
 663     {
 664         // first, ensure that the new text will be in the default style
 665         if ( !m_defaultStyle.IsDefault() )
 666         {
 667             long start, end;
 668             GetSelection(&start, &end);
 669             SetStyle(start, end, m_defaultStyle);
 670         }
 671
 672 #if wxUSE_UNICODE_MSLU
 673         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 674         // but EM_STREAMIN works
 675         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 676         {
 677            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 678         }
 679 #endif // wxUSE_UNICODE_MSLU
 680
 681 #if !wxUSE_UNICODE
 682         // next check if the text we're inserting must be shown in a non
 683         // default charset -- this only works for RichEdit > 1.0
 684         if ( GetRichVersion() > 1 )
 685         {
 686             wxFont font = m_defaultStyle.GetFont();
 687             if ( !font.Ok() )
 688                 font = GetFont();
 689
 690             if ( font.Ok() )
 691             {
 692                wxFontEncoding encoding = font.GetEncoding();
 693                if ( encoding != wxFONTENCODING_SYSTEM )
 694                {
 695                    done = StreamIn(valueDos, encoding, selectionOnly);
 696                }
 697             }
 698         }
 699 #endif // !wxUSE_UNICODE
 700     }
 701
 702     if ( !done )
 703 #endif // wxUSE_RICHEDIT
 704     {
 705         // in some cases we get 2 EN_CHANGE notifications after the SendMessage
 706         // call below which is confusing for the client code and so should be
 707         // avoided
 708         //
 709         // these cases are: (a) plain EDIT controls if EM_REPLACESEL is used
 710         // and there is a non empty selection currently and (b) rich text
 711         // controls in any case
 712         if (
 713 #if wxUSE_RICHEDIT
 714             IsRich() ||
 715 #endif // wxUSE_RICHEDIT
 716             (selectionOnly && HasSelection()) )
 717         {
 718             m_suppressNextUpdate = TRUE;
 719         }
 720
 721         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
 722                       0, (LPARAM)valueDos.c_str());
 723
 724         // OTOH, non rich text controls don't generate any events at all when
 725         // we use WM_SETTEXT -- have to emulate them here
 726         if ( !selectionOnly
 727 #if wxUSE_RICHEDIT
 728                 && !IsRich()
 729 #endif // wxUSE_RICHEDIT
 730            )
 731         {
 732             // Windows already sends an update event for single-line
 733             // controls.
 734             if ( m_windowStyle & wxTE_MULTILINE )
 735                 SendUpdateEvent();
 736         }
 737     }
 738
 739     AdjustSpaceLimit();
 740 }
 741
 742 void wxTextCtrl::AppendText(const wxString& text)
 743 {
 744     SetInsertionPointEnd();
 745
 746     WriteText(text);
 747
 748 #if wxUSE_RICHEDIT
 749     if ( IsMultiLine() && GetRichVersion() > 1 )
 750     {
 751         // setting the caret to the end and showing it simply doesn't work for
 752         // RichEdit 2.0 -- force it to still do what we want
 753         ::SendMessage(GetHwnd(), EM_LINESCROLL, 0, GetNumberOfLines());
 754     }
 755 #endif // wxUSE_RICHEDIT
 756 }
 757
 758 void wxTextCtrl::Clear()
 759 {
 760     ::SetWindowText(GetHwnd(), wxT(""));
 761
 762 #if wxUSE_RICHEDIT
 763     if ( !IsRich() )
 764 #endif // wxUSE_RICHEDIT
 765     {
 766         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
 767         // but the normal ones don't -- make Clear() behaviour consistent by
 768         // always sending this event
 769
 770         // Windows already sends an update event for single-line
 771         // controls.
 772         if ( m_windowStyle & wxTE_MULTILINE )
 773             SendUpdateEvent();
 774     }
 775 }
 776
 777 #ifdef __WIN32__
 778
 779 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 780 {
 781     SetFocus();
 782
 783     size_t lenOld = GetValue().length();
 784
 785     wxUint32 code = event.GetRawKeyCode();
 786     ::keybd_event(code, 0, 0 /* key press */, 0);
 787     ::keybd_event(code, 0, KEYEVENTF_KEYUP, 0);
 788
 789     // assume that any alphanumeric key changes the total number of characters
 790     // in the control - this should work in 99% of cases
 791     return GetValue().length() != lenOld;
 792 }
 793
 794 #endif // __WIN32__
 795
 796 // ----------------------------------------------------------------------------
 797 // Clipboard operations
 798 // ----------------------------------------------------------------------------
 799
 800 void wxTextCtrl::Copy()
 801 {
 802     if (CanCopy())
 803     {
 804         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
 805     }
 806 }
 807
 808 void wxTextCtrl::Cut()
 809 {
 810     if (CanCut())
 811     {
 812         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
 813     }
 814 }
 815
 816 void wxTextCtrl::Paste()
 817 {
 818     if (CanPaste())
 819     {
 820         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
 821     }
 822 }
 823
 824 bool wxTextCtrl::HasSelection() const
 825 {
 826     long from, to;
 827     GetSelection(&from, &to);
 828     return from != to;
 829 }
 830
 831 bool wxTextCtrl::CanCopy() const
 832 {
 833     // Can copy if there's a selection
 834     return HasSelection();
 835 }
 836
 837 bool wxTextCtrl::CanCut() const
 838 {
 839     return CanCopy() && IsEditable();
 840 }
 841
 842 bool wxTextCtrl::CanPaste() const
 843 {
 844     if ( !IsEditable() )
 845         return FALSE;
 846
 847 #if wxUSE_RICHEDIT
 848     if ( IsRich() )
 849     {
 850         UINT cf = 0; // 0 == any format
 851
 852         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
 853     }
 854 #endif // wxUSE_RICHEDIT
 855
 856     // Standard edit control: check for straight text on clipboard
 857     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 858         return FALSE;
 859
 860     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
 861     ::CloseClipboard();
 862
 863     return isTextAvailable;
 864 }
 865
 866 // ----------------------------------------------------------------------------
 867 // Accessors
 868 // ----------------------------------------------------------------------------
 869
 870 void wxTextCtrl::SetEditable(bool editable)
 871 {
 872     HWND hWnd = GetHwnd();
 873     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 874 }
 875
 876 void wxTextCtrl::SetInsertionPoint(long pos)
 877 {
 878     DoSetSelection(pos, pos);
 879 }
 880
 881 void wxTextCtrl::SetInsertionPointEnd()
 882 {
 883     // we must not do anything if the caret is already there because calling
 884     // SetInsertionPoint() thaws the controls if Freeze() had been called even
 885     // if it doesn't actually move the caret anywhere and so the simple fact of
 886     // doing it results in horrible flicker when appending big amounts of text
 887     // to the control in a few chunks (see DoAddText() test in the text sample)
 888     if ( GetInsertionPoint() == GetLastPosition() )
 889         return;
 890
 891     long pos;
 892
 893 #if wxUSE_RICHEDIT
 894     if ( m_verRichEdit == 1 )
 895     {
 896         // we don't have to waste time calling GetLastPosition() in this case
 897         pos = -1;
 898     }
 899     else // !RichEdit 1.0
 900 #endif // wxUSE_RICHEDIT
 901     {
 902         pos = GetLastPosition();
 903     }
 904
 905     SetInsertionPoint(pos);
 906 }
 907
 908 long wxTextCtrl::GetInsertionPoint() const
 909 {
 910 #if wxUSE_RICHEDIT
 911     if ( IsRich() )
 912     {
 913         CHARRANGE range;
 914         range.cpMin = 0;
 915         range.cpMax = 0;
 916         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 917         return range.cpMin;
 918     }
 919 #endif // wxUSE_RICHEDIT
 920
 921     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 922     return Pos & 0xFFFF;
 923 }
 924
 925 long wxTextCtrl::GetLastPosition() const
 926 {
 927     int numLines = GetNumberOfLines();
 928     long posStartLastLine = XYToPosition(0, numLines - 1);
 929
 930     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
 931
 932     return posStartLastLine + lenLastLine;
 933 }
 934
 935 // If the return values from and to are the same, there is no
 936 // selection.
 937 void wxTextCtrl::GetSelection(long* from, long* to) const
 938 {
 939 #if wxUSE_RICHEDIT
 940     if ( IsRich() )
 941     {
 942         CHARRANGE charRange;
 943         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
 944
 945         *from = charRange.cpMin;
 946         *to = charRange.cpMax;
 947     }
 948     else
 949 #endif // !wxUSE_RICHEDIT
 950     {
 951         DWORD dwStart, dwEnd;
 952         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
 953
 954         *from = dwStart;
 955         *to = dwEnd;
 956     }
 957 }
 958
 959 bool wxTextCtrl::IsEditable() const
 960 {
 961     // strangely enough, we may be called before the control is created: our
 962     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
 963     // us
 964     if ( !m_hWnd )
 965         return TRUE;
 966
 967     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 968
 969     return (style & ES_READONLY) == 0;
 970 }
 971
 972 // ----------------------------------------------------------------------------
 973 // selection
 974 // ----------------------------------------------------------------------------
 975
 976 void wxTextCtrl::SetSelection(long from, long to)
 977 {
 978     // if from and to are both -1, it means (in wxWindows) that all text should
 979     // be selected - translate into Windows convention
 980     if ( (from == -1) && (to == -1) )
 981     {
 982         from = 0;
 983         to = -1;
 984     }
 985
 986     DoSetSelection(from, to);
 987 }
 988
 989 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
 990 {
 991     HWND hWnd = GetHwnd();
 992
 993 #ifdef __WIN32__
 994 #if wxUSE_RICHEDIT
 995     if ( IsRich() )
 996     {
 997         CHARRANGE range;
 998         range.cpMin = from;
 999         range.cpMax = to;
1000         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
1001     }
1002     else
1003 #endif // wxUSE_RICHEDIT
1004     {
1005         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
1006     }
1007
1008     if ( scrollCaret )
1009     {
1010 #if wxUSE_RICHEDIT
1011         // richedit 3.0 (i.e. the version living in riched20.dll distributed
1012         // with Windows 2000 and beyond) doesn't honour EM_SCROLLCARET when
1013         // emulating richedit 2.0 unless the control has focus or ECO_NOHIDESEL
1014         // option is set (but it does work ok in richedit 1.0 mode...)
1015         //
1016         // so to make it work we either need to give focus to it here which
1017         // will probably create many problems (dummy focus events; window
1018         // containing the text control being brought to foreground
1019         // unexpectedly; ...) or to temporarily set ECO_NOHIDESEL which may
1020         // create other problems too -- and in fact it does because if we turn
1021         // on/off this style while appending the text to the control, the
1022         // vertical scrollbar never appears in it even if we append tons of
1023         // text and to work around this the only solution I found was to use
1024         // ES_DISABLENOSCROLL
1025         //
1026         // this is very ugly but I don't see any other way to make this work
1027         if ( GetRichVersion() > 1 )
1028         {
1029             if ( !HasFlag(wxTE_NOHIDESEL) )
1030             {
1031                 ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1032                               ECOOP_OR, ECO_NOHIDESEL);
1033             }
1034             //else: everything is already ok
1035         }
1036 #endif // wxUSE_RICHEDIT
1037
1038         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
1039
1040 #if wxUSE_RICHEDIT
1041         // restore ECO_NOHIDESEL if we changed it
1042         if ( GetRichVersion() > 1 && !HasFlag(wxTE_NOHIDESEL) )
1043         {
1044             ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1045                           ECOOP_AND, ~ECO_NOHIDESEL);
1046         }
1047 #endif // wxUSE_RICHEDIT
1048     }
1049 #else // Win16
1050     // WPARAM is 0: selection is scrolled into view
1051     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
1052 #endif // Win32/16
1053 }
1054
1055 // ----------------------------------------------------------------------------
1056 // Editing
1057 // ----------------------------------------------------------------------------
1058
1059 void wxTextCtrl::Replace(long from, long to, const wxString& value)
1060 {
1061     // Set selection and remove it
1062     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
1063
1064     SendMessage(GetHwnd(), EM_REPLACESEL,
1065 #ifdef __WIN32__
1066                 TRUE,
1067 #else
1068                 FALSE,
1069 #endif
1070                 (LPARAM)value.c_str());
1071 }
1072
1073 void wxTextCtrl::Remove(long from, long to)
1074 {
1075     Replace(from, to, _T(""));
1076 }
1077
1078 bool wxTextCtrl::LoadFile(const wxString& file)
1079 {
1080     if ( wxTextCtrlBase::LoadFile(file) )
1081     {
1082         // update the size limit if needed
1083         AdjustSpaceLimit();
1084
1085         return TRUE;
1086     }
1087
1088     return FALSE;
1089 }
1090
1091 bool wxTextCtrl::IsModified() const
1092 {
1093     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1094 }
1095
1096 // Makes 'unmodified'
1097 void wxTextCtrl::DiscardEdits()
1098 {
1099     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
1100 }
1101
1102 int wxTextCtrl::GetNumberOfLines() const
1103 {
1104     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
1105 }
1106
1107 long wxTextCtrl::XYToPosition(long x, long y) const
1108 {
1109     // This gets the char index for the _beginning_ of this line
1110     long charIndex = SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
1111
1112     return charIndex + x;
1113 }
1114
1115 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1116 {
1117     HWND hWnd = GetHwnd();
1118
1119     // This gets the line number containing the character
1120     long lineNo;
1121 #if wxUSE_RICHEDIT
1122     if ( IsRich() )
1123     {
1124         lineNo = SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1125     }
1126     else
1127 #endif // wxUSE_RICHEDIT
1128     {
1129         lineNo = SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1130     }
1131
1132     if ( lineNo == -1 )
1133     {
1134         // no such line
1135         return FALSE;
1136     }
1137
1138     // This gets the char index for the _beginning_ of this line
1139     long charIndex = SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1140     if ( charIndex == -1 )
1141     {
1142         return FALSE;
1143     }
1144
1145     // The X position must therefore be the different between pos and charIndex
1146     if ( x )
1147         *x = pos - charIndex;
1148     if ( y )
1149         *y = lineNo;
1150
1151     return TRUE;
1152 }
1153
1154 void wxTextCtrl::ShowPosition(long pos)
1155 {
1156     HWND hWnd = GetHwnd();
1157
1158     // To scroll to a position, we pass the number of lines and characters
1159     // to scroll *by*. This means that we need to:
1160     // (1) Find the line position of the current line.
1161     // (2) Find the line position of pos.
1162     // (3) Scroll by (pos - current).
1163     // For now, ignore the horizontal scrolling.
1164
1165     // Is this where scrolling is relative to - the line containing the caret?
1166     // Or is the first visible line??? Try first visible line.
1167 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1168
1169     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1170
1171     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1172
1173     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1174
1175     if (linesToScroll != 0)
1176       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1177 }
1178
1179 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1180 {
1181     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1182 }
1183
1184 int wxTextCtrl::GetLineLength(long lineNo) const
1185 {
1186     long pos = XYToPosition(0, lineNo);
1187
1188     return GetLengthOfLineContainingPos(pos);
1189 }
1190
1191 wxString wxTextCtrl::GetLineText(long lineNo) const
1192 {
1193     size_t len = (size_t)GetLineLength(lineNo) + 1;
1194
1195     // there must be at least enough place for the length WORD in the
1196     // buffer
1197     len += sizeof(WORD);
1198
1199     wxString str;
1200     wxChar *buf = str.GetWriteBuf(len);
1201
1202     *(WORD *)buf = (WORD)len;
1203     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1204     buf[len] = 0;
1205
1206     str.UngetWriteBuf(len);
1207
1208     return str;
1209 }
1210
1211 void wxTextCtrl::SetMaxLength(unsigned long len)
1212 {
1213     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1214 }
1215
1216 // ----------------------------------------------------------------------------
1217 // Undo/redo
1218 // ----------------------------------------------------------------------------
1219
1220 void wxTextCtrl::Undo()
1221 {
1222     if (CanUndo())
1223     {
1224         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1225     }
1226 }
1227
1228 void wxTextCtrl::Redo()
1229 {
1230     if (CanRedo())
1231     {
1232         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1233         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1234     }
1235 }
1236
1237 bool wxTextCtrl::CanUndo() const
1238 {
1239     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1240 }
1241
1242 bool wxTextCtrl::CanRedo() const
1243 {
1244     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1245 }
1246
1247 // ----------------------------------------------------------------------------
1248 // implemenation details
1249 // ----------------------------------------------------------------------------
1250
1251 void wxTextCtrl::Command(wxCommandEvent & event)
1252 {
1253     SetValue(event.GetString());
1254     ProcessCommand (event);
1255 }
1256
1257 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1258 {
1259     // By default, load the first file into the text window.
1260     if (event.GetNumberOfFiles() > 0)
1261     {
1262         LoadFile(event.GetFiles()[0]);
1263     }
1264 }
1265
1266 // ----------------------------------------------------------------------------
1267 // kbd input processing
1268 // ----------------------------------------------------------------------------
1269
1270 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1271 {
1272     MSG *msg = (MSG *)pMsg;
1273
1274     // check for our special keys here: if we don't do it and the parent frame
1275     // uses them as accelerators, they wouldn't work at all, so we disable
1276     // usual preprocessing for them
1277     if ( msg->message == WM_KEYDOWN )
1278     {
1279         WORD vkey = (WORD) msg->wParam;
1280         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1281         {
1282             if ( vkey == VK_BACK )
1283                 return FALSE;
1284         }
1285         else // no Alt
1286         {
1287             // we want to process some Ctrl-foo and Shift-bar but no key
1288             // combinations without either Ctrl or Shift nor with both of them
1289             // pressed
1290             const int ctrl = wxIsCtrlDown(),
1291                       shift = wxIsShiftDown();
1292             switch ( ctrl + shift )
1293             {
1294                 default:
1295                     wxFAIL_MSG( _T("how many modifiers have we got?") );
1296                     // fall through
1297
1298                 case 0:
1299                 case 2:
1300                     break;
1301
1302                 case 1:
1303                     // either Ctrl or Shift pressed
1304                     if ( ctrl )
1305                     {
1306                         switch ( vkey )
1307                         {
1308                             case 'C':
1309                             case 'V':
1310                             case 'X':
1311                             case VK_INSERT:
1312                             case VK_DELETE:
1313                             case VK_HOME:
1314                             case VK_END:
1315                                 return FALSE;
1316                         }
1317                     }
1318                     else // Shift is pressed
1319                     {
1320                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1321                             return FALSE;
1322                     }
1323             }
1324         }
1325     }
1326
1327     return wxControl::MSWShouldPreProcessMessage(pMsg);
1328 }
1329
1330 void wxTextCtrl::OnChar(wxKeyEvent& event)
1331 {
1332     switch ( event.GetKeyCode() )
1333     {
1334         case WXK_RETURN:
1335             if ( !(m_windowStyle & wxTE_MULTILINE) )
1336             {
1337                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1338                 InitCommandEvent(event);
1339                 event.SetString(GetValue());
1340                 if ( GetEventHandler()->ProcessEvent(event) )
1341                     return;
1342             }
1343             //else: multiline controls need Enter for themselves
1344
1345             break;
1346
1347         case WXK_TAB:
1348             // always produce navigation event - even if we process TAB
1349             // ourselves the fact that we got here means that the user code
1350             // decided to skip processing of this TAB - probably to let it
1351             // do its default job.
1352             {
1353                 wxNavigationKeyEvent eventNav;
1354                 eventNav.SetDirection(!event.ShiftDown());
1355                 eventNav.SetWindowChange(event.ControlDown());
1356                 eventNav.SetEventObject(this);
1357
1358                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1359                     return;
1360             }
1361             break;
1362     }
1363
1364     // no, we didn't process it
1365     event.Skip();
1366 }
1367
1368 long wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1369 {
1370     long lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1371
1372     if ( nMsg == WM_GETDLGCODE )
1373     {
1374         // we always want the chars and the arrows: the arrows for navigation
1375         // and the chars because we want Ctrl-C to work even in a read only
1376         // control
1377         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1378
1379         if ( IsEditable() )
1380         {
1381             // we may have several different cases:
1382             // 1. normal case: both TAB and ENTER are used for dlg navigation
1383             // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1384             //    next control in the dialog
1385             // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1386             //    navigation
1387             // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to go
1388             //    to the next control
1389
1390             // the multiline edit control should always get <Return> for itself
1391             if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1392                 lDlgCode |= DLGC_WANTMESSAGE;
1393
1394             if ( HasFlag(wxTE_PROCESS_TAB) )
1395                 lDlgCode |= DLGC_WANTTAB;
1396
1397             lRc |= lDlgCode;
1398         }
1399         else // !editable
1400         {
1401             // NB: use "=", not "|=" as the base class version returns the
1402             //     same flags is this state as usual (i.e. including
1403             //     DLGC_WANTMESSAGE). This is strange (how does it work in the
1404             //     native Win32 apps?) but for now live with it.
1405             lRc = lDlgCode;
1406         }
1407     }
1408
1409     return lRc;
1410 }
1411
1412 // ----------------------------------------------------------------------------
1413 // text control event processing
1414 // ----------------------------------------------------------------------------
1415
1416 bool wxTextCtrl::SendUpdateEvent()
1417 {
1418     // is event reporting suspended?
1419     if ( m_suppressNextUpdate )
1420     {
1421         // do process the next one
1422         m_suppressNextUpdate = FALSE;
1423
1424         return FALSE;
1425     }
1426
1427     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1428     InitCommandEvent(event);
1429     event.SetString(GetValue());
1430
1431     return ProcessCommand(event);
1432 }
1433
1434 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1435 {
1436     switch ( param )
1437     {
1438         case EN_SETFOCUS:
1439         case EN_KILLFOCUS:
1440             {
1441                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1442                                                          : wxEVT_SET_FOCUS,
1443                                    m_windowId);
1444                 event.SetEventObject(this);
1445                 GetEventHandler()->ProcessEvent(event);
1446             }
1447             break;
1448
1449         case EN_CHANGE:
1450             SendUpdateEvent();
1451             break;
1452
1453         case EN_MAXTEXT:
1454             // the text size limit has been hit -- try to increase it
1455             if ( !AdjustSpaceLimit() )
1456             {
1457                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1458                 InitCommandEvent(event);
1459                 event.SetString(GetValue());
1460                 ProcessCommand(event);
1461             }
1462             break;
1463
1464             // the other edit notification messages are not processed
1465         default:
1466             return FALSE;
1467     }
1468
1469     // processed
1470     return TRUE;
1471 }
1472
1473 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1474 #if wxUSE_CTL3D
1475                                WXUINT message,
1476                                WXWPARAM wParam,
1477                                WXLPARAM lParam
1478 #else
1479                                WXUINT WXUNUSED(message),
1480                                WXWPARAM WXUNUSED(wParam),
1481                                WXLPARAM WXUNUSED(lParam)
1482 #endif
1483     )
1484 {
1485 #if wxUSE_CTL3D
1486     if ( m_useCtl3D )
1487     {
1488         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1489         return (WXHBRUSH) hbrush;
1490     }
1491 #endif // wxUSE_CTL3D
1492
1493     HDC hdc = (HDC)pDC;
1494     if (GetParent()->GetTransparentBackground())
1495         SetBkMode(hdc, TRANSPARENT);
1496     else
1497         SetBkMode(hdc, OPAQUE);
1498
1499     wxColour colBack = GetBackgroundColour();
1500
1501     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1502         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1503
1504     ::SetBkColor(hdc, wxColourToRGB(colBack));
1505     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1506
1507     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1508
1509     return (WXHBRUSH)brush->GetResourceHandle();
1510 }
1511
1512 // In WIN16, need to override normal erasing because
1513 // Ctl3D doesn't use the wxWindows background colour.
1514 #ifdef __WIN16__
1515 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1516 {
1517     wxColour col(m_backgroundColour);
1518
1519 #if wxUSE_CTL3D
1520     if (m_useCtl3D)
1521         col = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1522 #endif
1523
1524     RECT rect;
1525     ::GetClientRect(GetHwnd(), &rect);
1526
1527     COLORREF ref = wxColourToRGB(col);
1528     HBRUSH hBrush = ::CreateSolidBrush(ref);
1529     if ( !hBrush )
1530         wxLogLastError(wxT("CreateSolidBrush"));
1531
1532     HDC hdc = (HDC)event.GetDC()->GetHDC();
1533
1534     int mode = ::SetMapMode(hdc, MM_TEXT);
1535
1536     ::FillRect(hdc, &rect, hBrush);
1537     ::DeleteObject(hBrush);
1538     ::SetMapMode(hdc, mode);
1539
1540 }
1541 #endif // Win16
1542
1543 bool wxTextCtrl::AdjustSpaceLimit()
1544 {
1545 #ifndef __WIN16__
1546     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1547
1548     // HACK: we try to automatically extend the limit for the amount of text
1549     //       to allow (interactively) entering more than 64Kb of text under
1550     //       Win9x but we shouldn't reset the text limit which was previously
1551     //       set explicitly with SetMaxLength()
1552     //
1553     //       we could solve this by storing the limit we set in wxTextCtrl but
1554     //       to save space we prefer to simply test here the actual limit
1555     //       value: we consider that SetMaxLength() can only be called for
1556     //       values < 32Kb
1557     if ( limit < 0x8000 )
1558     {
1559         // we've got more text than limit set by SetMaxLength()
1560         return FALSE;
1561     }
1562
1563     unsigned int len = ::GetWindowTextLength(GetHwnd());
1564     if ( len >= limit )
1565     {
1566         limit = len + 0x8000;    // 32Kb
1567
1568 #if wxUSE_RICHEDIT
1569         if ( IsRich() )
1570         {
1571             // as a nice side effect, this also allows passing limit > 64Kb
1572             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1573         }
1574         else
1575 #endif // wxUSE_RICHEDIT
1576         {
1577             if ( limit > 0xffff )
1578             {
1579                 // this will set it to a platform-dependent maximum (much more
1580                 // than 64Kb under NT)
1581                 limit = 0;
1582             }
1583
1584             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1585         }
1586     }
1587 #endif // !Win16
1588
1589     // we changed the limit
1590     return TRUE;
1591 }
1592
1593 bool wxTextCtrl::AcceptsFocus() const
1594 {
1595     // we don't want focus if we can't be edited unless we're a multiline
1596     // control because then it might be still nice to get focus from keyboard
1597     // to be able to scroll it without mouse
1598     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
1599 }
1600
1601 wxSize wxTextCtrl::DoGetBestSize() const
1602 {
1603     int cx, cy;
1604     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1605
1606     int wText = DEFAULT_ITEM_WIDTH;
1607
1608     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1609     if ( m_windowStyle & wxTE_MULTILINE )
1610     {
1611         hText *= wxMax(GetNumberOfLines(), 5);
1612     }
1613     //else: for single line control everything is ok
1614
1615     return wxSize(wText, hText);
1616 }
1617
1618 // ----------------------------------------------------------------------------
1619 // standard handlers for standard edit menu events
1620 // ----------------------------------------------------------------------------
1621
1622 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1623 {
1624     Cut();
1625 }
1626
1627 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1628 {
1629     Copy();
1630 }
1631
1632 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1633 {
1634     Paste();
1635 }
1636
1637 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1638 {
1639     Undo();
1640 }
1641
1642 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1643 {
1644     Redo();
1645 }
1646
1647 void wxTextCtrl::OnDelete(wxCommandEvent& event)
1648 {
1649     long from, to;
1650     GetSelection(& from, & to);
1651     if (from != -1 && to != -1)
1652         Remove(from, to);
1653 }
1654
1655 void wxTextCtrl::OnSelectAll(wxCommandEvent& event)
1656 {
1657     SetSelection(-1, -1);
1658 }
1659
1660 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1661 {
1662     event.Enable( CanCut() );
1663 }
1664
1665 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1666 {
1667     event.Enable( CanCopy() );
1668 }
1669
1670 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1671 {
1672     event.Enable( CanPaste() );
1673 }
1674
1675 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1676 {
1677     event.Enable( CanUndo() );
1678 }
1679
1680 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1681 {
1682     event.Enable( CanRedo() );
1683 }
1684
1685 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
1686 {
1687     long from, to;
1688     GetSelection(& from, & to);
1689     event.Enable(from != -1 && to != -1 && from != to && IsEditable()) ;
1690 }
1691
1692 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
1693 {
1694     event.Enable(GetLastPosition() > 0);
1695 }
1696
1697 void wxTextCtrl::OnRightClick(wxMouseEvent& event)
1698 {
1699 #if wxUSE_RICHEDIT
1700     if (IsRich())
1701     {
1702         if (!m_privateContextMenu)
1703         {
1704             m_privateContextMenu = new wxMenu;
1705             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
1706             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
1707             m_privateContextMenu->AppendSeparator();
1708             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
1709             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
1710             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
1711             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
1712             m_privateContextMenu->AppendSeparator();
1713             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
1714         }
1715         PopupMenu(m_privateContextMenu, event.GetPosition());
1716         return;
1717     }
1718     else
1719 #endif
1720     event.Skip();
1721 }
1722
1723 // the rest of the file only deals with the rich edit controls
1724 #if wxUSE_RICHEDIT
1725
1726 // ----------------------------------------------------------------------------
1727 // EN_LINK processing
1728 // ----------------------------------------------------------------------------
1729
1730 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1731 {
1732     NMHDR *hdr = (NMHDR* )lParam;
1733     switch ( hdr->code )
1734     {
1735        case EN_MSGFILTER:
1736             {
1737                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
1738                 UINT msg = msgf->msg;
1739
1740                 // this is a bit crazy but richedit 1.0 sends us all mouse
1741                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
1742                 // generate the wxWin events for this message manually
1743                 //
1744                 // NB: in fact, this is still not totally correct as it does
1745                 //     send us WM_LBUTTONUP if the selection was cleared by the
1746                 //     last click -- so currently we get 2 events in this case,
1747                 //     but as I don't see any obvious way to check for this I
1748                 //     leave this code in place because it's still better than
1749                 //     not getting left up events at all
1750                 if ( msg == WM_LBUTTONUP )
1751                 {
1752                     WXUINT flags = msgf->wParam;
1753                     int x = GET_X_LPARAM(msgf->lParam),
1754                         y = GET_Y_LPARAM(msgf->lParam);
1755
1756                     HandleMouseEvent(msg, x, y, flags);
1757                 }
1758             }
1759
1760             // return TRUE to process the event (and FALSE to ignore it)
1761             return TRUE;
1762
1763         case EN_LINK:
1764             {
1765                 const ENLINK *enlink = (ENLINK *)hdr;
1766
1767                 switch ( enlink->msg )
1768                 {
1769                     case WM_SETCURSOR:
1770                         // ok, so it is hardcoded - do we really nee to
1771                         // customize it?
1772                         ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1773                         *result = TRUE;
1774                         break;
1775
1776                     case WM_MOUSEMOVE:
1777                     case WM_LBUTTONDOWN:
1778                     case WM_LBUTTONUP:
1779                     case WM_LBUTTONDBLCLK:
1780                     case WM_RBUTTONDOWN:
1781                     case WM_RBUTTONUP:
1782                     case WM_RBUTTONDBLCLK:
1783                         // send a mouse event
1784                         {
1785                             static const wxEventType eventsMouse[] =
1786                             {
1787                                 wxEVT_MOTION,
1788                                 wxEVT_LEFT_DOWN,
1789                                 wxEVT_LEFT_UP,
1790                                 wxEVT_LEFT_DCLICK,
1791                                 wxEVT_RIGHT_DOWN,
1792                                 wxEVT_RIGHT_UP,
1793                                 wxEVT_RIGHT_DCLICK,
1794                             };
1795
1796                             // the event ids are consecutive
1797                             wxMouseEvent
1798                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1799
1800                             InitMouseEvent(evtMouse,
1801                                            GET_X_LPARAM(enlink->lParam),
1802                                            GET_Y_LPARAM(enlink->lParam),
1803                                            enlink->wParam);
1804
1805                             wxTextUrlEvent event(m_windowId, evtMouse,
1806                                                  enlink->chrg.cpMin,
1807                                                  enlink->chrg.cpMax);
1808
1809                             InitCommandEvent(event);
1810
1811                             *result = ProcessCommand(event);
1812                         }
1813                         break;
1814                 }
1815             }
1816             return TRUE;
1817     }
1818
1819     // not processed, leave it to the base class
1820     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
1821 }
1822
1823 // ----------------------------------------------------------------------------
1824 // colour setting for the rich edit controls
1825 // ----------------------------------------------------------------------------
1826
1827 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1828 {
1829     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1830     {
1831         // colour didn't really change
1832         return FALSE;
1833     }
1834
1835     if ( IsRich() )
1836     {
1837         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1838         // EM_SETBKGNDCOLOR additionally
1839         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1840     }
1841
1842     return TRUE;
1843 }
1844
1845 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1846 {
1847     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1848     {
1849         // colour didn't really change
1850         return FALSE;
1851     }
1852
1853     if ( IsRich() )
1854     {
1855         // change the colour of everything
1856         CHARFORMAT cf;
1857         wxZeroMemory(cf);
1858         cf.cbSize = sizeof(cf);
1859         cf.dwMask = CFM_COLOR;
1860         cf.crTextColor = wxColourToRGB(colour);
1861         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1862     }
1863
1864     return TRUE;
1865 }
1866
1867 // ----------------------------------------------------------------------------
1868 // styling support for rich edit controls
1869 // ----------------------------------------------------------------------------
1870
1871 #if wxUSE_RICHEDIT
1872
1873 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1874 {
1875     if ( !IsRich() )
1876     {
1877         // can't do it with normal text control
1878         return FALSE;
1879     }
1880
1881     // the richedit 1.0 doesn't handle setting background colour, so don't
1882     // even try to do anything if it's the only thing we want to change
1883     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() &&
1884         !style.HasLeftIndent() && !style.HasRightIndent() && !style.HasAlignment() &&
1885         !style.HasTabs() )
1886     {
1887         // nothing to do: return TRUE if there was really nothing to do and
1888         // FALSE if we failed to set bg colour
1889         return !style.HasBackgroundColour();
1890     }
1891
1892     // order the range if needed
1893     if ( start > end )
1894     {
1895         long tmp = start;
1896         start = end;
1897         end = tmp;
1898     }
1899
1900     // we can only change the format of the selection, so select the range we
1901     // want and restore the old selection later
1902     long startOld, endOld;
1903     GetSelection(&startOld, &endOld);
1904
1905     // but do we really have to change the selection?
1906     bool changeSel = start != startOld || end != endOld;
1907
1908     if ( changeSel )
1909     {
1910         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
1911     }
1912
1913     // initialize CHARFORMAT struct
1914 #if wxUSE_RICHEDIT2
1915     CHARFORMAT2 cf;
1916 #else
1917     CHARFORMAT cf;
1918 #endif
1919
1920     wxZeroMemory(cf);
1921
1922     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
1923     // CHARFORMAT in that case
1924 #if wxUSE_RICHEDIT2
1925     if ( m_verRichEdit == 1 )
1926     {
1927         // this is the only thing the control is going to grok
1928         cf.cbSize = sizeof(CHARFORMAT);
1929     }
1930     else
1931 #endif
1932     {
1933         // CHARFORMAT or CHARFORMAT2
1934         cf.cbSize = sizeof(cf);
1935     }
1936
1937     if ( style.HasFont() )
1938     {
1939         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
1940         //     but using it doesn't seem to hurt neither so leaving it for now
1941
1942         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1943                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1944
1945         // fill in data from LOGFONT but recalculate lfHeight because we need
1946         // the real height in twips and not the negative number which
1947         // wxFillLogFont() returns (this is correct in general and works with
1948         // the Windows font mapper, but not here)
1949         LOGFONT lf;
1950         wxFillLogFont(&lf, &style.GetFont());
1951         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1952         cf.bCharSet = lf.lfCharSet;
1953         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1954         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1955
1956         // also deal with underline/italic/bold attributes: note that we must
1957         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1958         // style to allow clearing it
1959         if ( lf.lfItalic )
1960         {
1961             cf.dwEffects |= CFE_ITALIC;
1962         }
1963
1964         if ( lf.lfWeight == FW_BOLD )
1965         {
1966             cf.dwEffects |= CFE_BOLD;
1967         }
1968
1969         if ( lf.lfUnderline )
1970         {
1971             cf.dwEffects |= CFE_UNDERLINE;
1972         }
1973
1974         // strikeout fonts are not supported by wxWindows
1975     }
1976
1977     if ( style.HasTextColour() )
1978     {
1979         cf.dwMask |= CFM_COLOR;
1980         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1981     }
1982
1983 #if wxUSE_RICHEDIT2
1984     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
1985     {
1986         cf.dwMask |= CFM_BACKCOLOR;
1987         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1988     }
1989 #endif // wxUSE_RICHEDIT2
1990
1991     // do format the selection
1992     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1993                             SCF_SELECTION, (LPARAM)&cf) != 0;
1994     if ( !ok )
1995     {
1996         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1997     }
1998
1999     // now do the paragraph formatting
2000     PARAFORMAT2 pf;
2001     wxZeroMemory(pf);
2002     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2003     // PARAFORMAT in that case
2004 #if wxUSE_RICHEDIT2
2005     if ( m_verRichEdit == 1 )
2006     {
2007         // this is the only thing the control is going to grok
2008         pf.cbSize = sizeof(PARAFORMAT);
2009     }
2010     else
2011 #endif
2012     {
2013         // PARAFORMAT or PARAFORMAT2
2014         pf.cbSize = sizeof(pf);
2015     }
2016
2017     if (style.HasAlignment())
2018     {
2019         pf.dwMask |= PFM_ALIGNMENT;
2020         if (style.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
2021             pf.wAlignment = PFA_RIGHT;
2022         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
2023             pf.wAlignment = PFA_CENTER;
2024         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
2025             pf.wAlignment = PFA_JUSTIFY;
2026         else
2027             pf.wAlignment = PFA_LEFT;
2028     }
2029
2030     if (style.HasLeftIndent())
2031     {
2032         pf.dwMask |= PFM_STARTINDENT;
2033
2034         // Convert from 1/10 mm to TWIPS
2035         pf.dxStartIndent = (int) (((double) style.GetLeftIndent()) * mm2twips / 10.0) ;
2036
2037         // TODO: do we need to specify dxOffset?
2038     }
2039
2040     if (style.HasRightIndent())
2041     {
2042         pf.dwMask |= PFM_RIGHTINDENT;
2043
2044         // Convert from 1/10 mm to TWIPS
2045         pf.dxRightIndent = (int) (((double) style.GetRightIndent()) * mm2twips / 10.0) ;
2046     }
2047
2048     if (style.HasTabs())
2049     {
2050         pf.dwMask |= PFM_TABSTOPS;
2051
2052         const wxArrayInt& tabs = style.GetTabs();
2053
2054         pf.cTabCount = wxMin(tabs.GetCount(), MAX_TAB_STOPS);
2055         size_t i;
2056         for (i = 0; i < (size_t) pf.cTabCount; i++)
2057         {
2058             // Convert from 1/10 mm to TWIPS
2059             pf.rgxTabs[i] = (int) (((double) tabs[i]) * mm2twips / 10.0) ;
2060         }
2061     }
2062
2063     if (pf.dwMask != 0)
2064     {
2065         // do format the selection
2066         bool ok = ::SendMessage(GetHwnd(), EM_SETPARAFORMAT,
2067             0, (LPARAM) &pf) != 0;
2068         if ( !ok )
2069         {
2070             wxLogDebug(_T("SendMessage(EM_SETPARAFORMAT, 0) failed"));
2071         }
2072     }
2073
2074     if ( changeSel )
2075     {
2076         // restore the original selection
2077         DoSetSelection(startOld, endOld, FALSE);
2078     }
2079
2080     return ok;
2081 }
2082
2083 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2084 {
2085     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2086         return FALSE;
2087
2088     // we have to do this or the style wouldn't apply for the text typed by the
2089     // user
2090     long posLast = GetLastPosition();
2091     SetStyle(posLast, posLast, m_defaultStyle);
2092
2093     return TRUE;
2094 }
2095
2096 bool wxTextCtrl::GetStyle(long WXUNUSED(position), wxTextAttr& WXUNUSED(style))
2097 {
2098     // TODO
2099     return FALSE;
2100 }
2101
2102 #endif
2103
2104 // ----------------------------------------------------------------------------
2105 // wxRichEditModule
2106 // ----------------------------------------------------------------------------
2107
2108 bool wxRichEditModule::OnInit()
2109 {
2110     // don't do anything - we will load it when needed
2111     return TRUE;
2112 }
2113
2114 void wxRichEditModule::OnExit()
2115 {
2116     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2117     {
2118         if ( ms_hRichEdit[i] )
2119         {
2120             ::FreeLibrary(ms_hRichEdit[i]);
2121         }
2122     }
2123 }
2124
2125 /* static */
2126 bool wxRichEditModule::Load(int version)
2127 {
2128     // we don't support loading richedit 3.0 as I don't know how to distinguish
2129     // it from 2.0 anyhow
2130     wxCHECK_MSG( version == 1 || version == 2, FALSE,
2131                  _T("incorrect richedit control version requested") );
2132
2133     // make it the index in the array
2134     version--;
2135
2136     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
2137     {
2138         // we had already tried to load it and failed
2139         return FALSE;
2140     }
2141
2142     if ( ms_hRichEdit[version] )
2143     {
2144         // we've already got this one
2145         return TRUE;
2146     }
2147
2148     wxString dllname = version ? _T("riched20") : _T("riched32");
2149     dllname += _T(".dll");
2150
2151     ms_hRichEdit[version] = ::LoadLibrary(dllname);
2152
2153     if ( !ms_hRichEdit[version] )
2154     {
2155         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
2156
2157         ms_hRichEdit[version] = (HINSTANCE)-1;
2158
2159         return FALSE;
2160     }
2161
2162     return TRUE;
2163 }
2164
2165 #endif // wxUSE_RICHEDIT
2166
2167 #endif // wxUSE_TEXTCTRL