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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  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 && !(defined(__SMARTPHONE__) && defined(__WXWINCE__))
  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     #include "wx/math.h"
  43 #endif
  44
  45 #include "wx/module.h"
  46
  47 #if wxUSE_CLIPBOARD
  48     #include "wx/clipbrd.h"
  49 #endif
  50
  51 #include "wx/textfile.h"
  52
  53 #include <windowsx.h>
  54
  55 #include "wx/msw/private.h"
  56 #include "wx/msw/winundef.h"
  57
  58 #include <string.h>
  59 #include <stdlib.h>
  60
  61 #ifndef __WXWINCE__
  62 #include <sys/types.h>
  63 #endif
  64
  65 #if wxUSE_RICHEDIT
  66
  67 // old mingw32 has richedit stuff directly in windows.h and doesn't have
  68 // richedit.h at all
  69 #if !defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__)
  70     #include <richedit.h>
  71 #endif
  72
  73 #include "wx/msw/missing.h"
  74
  75 #endif // wxUSE_RICHEDIT
  76
  77 // ----------------------------------------------------------------------------
  78 // private classes
  79 // ----------------------------------------------------------------------------
  80
  81 #if wxUSE_RICHEDIT
  82
  83 // this module initializes RichEdit DLL(s) if needed
  84 class wxRichEditModule : public wxModule
  85 {
  86 public:
  87     virtual bool OnInit();
  88     virtual void OnExit();
  89
  90     // load the richedit DLL of at least of required version
  91     static bool Load(int version = 1);
  92
  93 private:
  94     // the handles to richedit 1.0 and 2.0 (or 3.0) DLLs
  95     static HINSTANCE ms_hRichEdit[2];
  96
  97     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
  98 };
  99
 100 HINSTANCE wxRichEditModule::ms_hRichEdit[2] = { NULL, NULL };
 101
 102 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 103
 104 #endif // wxUSE_RICHEDIT
 105
 106 // a small class used to set m_updatesCount to 0 (to filter duplicate events if
 107 // necessary) and to reset it back to -1 afterwards
 108 class UpdatesCountFilter
 109 {
 110 public:
 111     UpdatesCountFilter(int& count)
 112         : m_count(count)
 113     {
 114         wxASSERT_MSG( m_count == -1, _T("wrong initial m_updatesCount value") );
 115
 116         m_count = 0;
 117     }
 118
 119     ~UpdatesCountFilter()
 120     {
 121         m_count = -1;
 122     }
 123
 124     // return true if an event has been received
 125     bool GotUpdate() const
 126     {
 127         return m_count == 1;
 128     }
 129
 130 private:
 131     int& m_count;
 132
 133     DECLARE_NO_COPY_CLASS(UpdatesCountFilter)
 134 };
 135
 136 // ----------------------------------------------------------------------------
 137 // event tables and other macros
 138 // ----------------------------------------------------------------------------
 139
 140 #if wxUSE_EXTENDED_RTTI
 141 WX_DEFINE_FLAGS( wxTextCtrlStyle )
 142
 143 wxBEGIN_FLAGS( wxTextCtrlStyle )
 144     // new style border flags, we put them first to
 145     // use them for streaming out
 146     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
 147     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
 148     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
 149     wxFLAGS_MEMBER(wxBORDER_RAISED)
 150     wxFLAGS_MEMBER(wxBORDER_STATIC)
 151     wxFLAGS_MEMBER(wxBORDER_NONE)
 152
 153     // old style border flags
 154     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
 155     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
 156     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
 157     wxFLAGS_MEMBER(wxRAISED_BORDER)
 158     wxFLAGS_MEMBER(wxSTATIC_BORDER)
 159     wxFLAGS_MEMBER(wxBORDER)
 160
 161     // standard window styles
 162     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
 163     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
 164     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
 165     wxFLAGS_MEMBER(wxWANTS_CHARS)
 166     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
 167     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
 168     wxFLAGS_MEMBER(wxVSCROLL)
 169     wxFLAGS_MEMBER(wxHSCROLL)
 170
 171     wxFLAGS_MEMBER(wxTE_PROCESS_ENTER)
 172     wxFLAGS_MEMBER(wxTE_PROCESS_TAB)
 173     wxFLAGS_MEMBER(wxTE_MULTILINE)
 174     wxFLAGS_MEMBER(wxTE_PASSWORD)
 175     wxFLAGS_MEMBER(wxTE_READONLY)
 176     wxFLAGS_MEMBER(wxHSCROLL)
 177     wxFLAGS_MEMBER(wxTE_RICH)
 178     wxFLAGS_MEMBER(wxTE_RICH2)
 179     wxFLAGS_MEMBER(wxTE_AUTO_URL)
 180     wxFLAGS_MEMBER(wxTE_NOHIDESEL)
 181     wxFLAGS_MEMBER(wxTE_LEFT)
 182     wxFLAGS_MEMBER(wxTE_CENTRE)
 183     wxFLAGS_MEMBER(wxTE_RIGHT)
 184     wxFLAGS_MEMBER(wxTE_DONTWRAP)
 185     wxFLAGS_MEMBER(wxTE_LINEWRAP)
 186     wxFLAGS_MEMBER(wxTE_WORDWRAP)
 187
 188 wxEND_FLAGS( wxTextCtrlStyle )
 189
 190 IMPLEMENT_DYNAMIC_CLASS_XTI(wxTextCtrl, wxControl,"wx/textctrl.h")
 191
 192 wxBEGIN_PROPERTIES_TABLE(wxTextCtrl)
 193     wxEVENT_PROPERTY( TextUpdated , wxEVT_COMMAND_TEXT_UPDATED , wxCommandEvent )
 194     wxEVENT_PROPERTY( TextEnter , wxEVT_COMMAND_TEXT_ENTER , wxCommandEvent )
 195
 196     wxPROPERTY( Font , wxFont , SetFont , GetFont  , EMPTY_MACROVALUE, 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
 197     wxPROPERTY( Value , wxString , SetValue, GetValue, wxString() , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 198     wxPROPERTY_FLAGS( WindowStyle , wxTextCtrlStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
 199 wxEND_PROPERTIES_TABLE()
 200
 201 wxBEGIN_HANDLERS_TABLE(wxTextCtrl)
 202 wxEND_HANDLERS_TABLE()
 203
 204 wxCONSTRUCTOR_6( wxTextCtrl , wxWindow* , Parent , wxWindowID , Id , wxString , Value , wxPoint , Position , wxSize , Size , long , WindowStyle)
 205 #else
 206 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 207 #endif
 208
 209
 210 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 211     EVT_CHAR(wxTextCtrl::OnChar)
 212     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 213
 214 #if wxUSE_RICHEDIT
 215     EVT_CONTEXT_MENU(wxTextCtrl::OnContextMenu)
 216 #endif
 217
 218     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 219     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 220     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 221     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 222     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 223     EVT_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
 224     EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)
 225
 226     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 227     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 228     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 229     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 230     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 231     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
 232     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
 233
 234     EVT_SET_FOCUS(wxTextCtrl::OnSetFocus)
 235 END_EVENT_TABLE()
 236
 237 // ============================================================================
 238 // implementation
 239 // ============================================================================
 240
 241 // ----------------------------------------------------------------------------
 242 // creation
 243 // ----------------------------------------------------------------------------
 244
 245 void wxTextCtrl::Init()
 246 {
 247 #if wxUSE_RICHEDIT
 248     m_verRichEdit = 0;
 249 #endif // wxUSE_RICHEDIT
 250
 251     m_privateContextMenu = NULL;
 252     m_updatesCount = -1;
 253     m_isNativeCaretShown = true;
 254 }
 255
 256 wxTextCtrl::~wxTextCtrl()
 257 {
 258     delete m_privateContextMenu;
 259 }
 260
 261 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 262                         const wxString& value,
 263                         const wxPoint& pos,
 264                         const wxSize& size,
 265                         long style,
 266                         const wxValidator& validator,
 267                         const wxString& name)
 268 {
 269 #ifdef __WXWINCE__
 270     if ((style & wxBORDER_MASK) == 0)
 271         style |= wxBORDER_SIMPLE;
 272 #endif
 273
 274     // base initialization
 275     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
 276         return false;
 277
 278     // translate wxWin style flags to MSW ones
 279     WXDWORD msStyle = MSWGetCreateWindowFlags();
 280
 281     // do create the control - either an EDIT or RICHEDIT
 282     wxString windowClass = wxT("EDIT");
 283
 284 #if defined(__POCKETPC__) || defined(__SMARTPHONE__)
 285     // A control that capitalizes the first letter
 286     if (style & wxTE_CAPITALIZE)
 287         windowClass = wxT("CAPEDIT");
 288 #endif
 289
 290 #if wxUSE_RICHEDIT
 291     if ( m_windowStyle & wxTE_AUTO_URL )
 292     {
 293         // automatic URL detection only works in RichEdit 2.0+
 294         m_windowStyle |= wxTE_RICH2;
 295     }
 296
 297     if ( m_windowStyle & wxTE_RICH2 )
 298     {
 299         // using richedit 2.0 implies using wxTE_RICH
 300         m_windowStyle |= wxTE_RICH;
 301     }
 302
 303     // we need to load the richedit DLL before creating the rich edit control
 304     if ( m_windowStyle & wxTE_RICH )
 305     {
 306         static bool s_errorGiven = false;// MT-FIXME
 307
 308         // Which version do we need? Use 1.0 by default because it is much more
 309         // like the the standard EDIT or 2.0 if explicitly requested, but use
 310         // only 2.0 in Unicode mode as 1.0 doesn't support Unicode at all
 311         //
 312         // TODO: RichEdit 3.0 is apparently capable of emulating RichEdit 1.0
 313         //       (and thus EDIT) much better than RichEdit 2.0 so we probably
 314         //       should use 3.0 if available as it is the best of both worlds -
 315         //       but as I can't test it right now I don't do it (VZ)
 316 #if wxUSE_UNICODE
 317         const int verRichEdit = 2;
 318 #else // !wxUSE_UNICODE
 319         int verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 320 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 321
 322         // only give the error msg once if the DLL can't be loaded
 323         if ( !s_errorGiven )
 324         {
 325             // try to load the RichEdit DLL (will do nothing if already done)
 326             if ( !wxRichEditModule::Load(verRichEdit) )
 327             {
 328 #if !wxUSE_UNICODE
 329                 // try another version?
 330                 verRichEdit = 3 - verRichEdit; // 1 <-> 2
 331
 332                 if ( !wxRichEditModule::Load(verRichEdit) )
 333 #endif // wxUSE_UNICODE
 334                 {
 335                     wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 336
 337                     s_errorGiven = true;
 338                 }
 339             }
 340         }
 341
 342         // have we managed to load any richedit version?
 343         if ( !s_errorGiven )
 344         {
 345             m_verRichEdit = verRichEdit;
 346             if ( m_verRichEdit == 1 )
 347             {
 348                 windowClass = wxT("RICHEDIT");
 349             }
 350             else
 351             {
 352 #ifndef RICHEDIT_CLASS
 353                 wxString RICHEDIT_CLASS;
 354                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 355 #if wxUSE_UNICODE
 356                 RICHEDIT_CLASS += _T('W');
 357 #else // ANSI
 358                 RICHEDIT_CLASS += _T('A');
 359 #endif // Unicode/ANSI
 360 #endif // !RICHEDIT_CLASS
 361
 362                 windowClass = RICHEDIT_CLASS;
 363             }
 364         }
 365     }
 366 #endif // wxUSE_RICHEDIT
 367
 368     // we need to turn '\n's into "\r\n"s for the multiline controls
 369     wxString valueWin;
 370     if ( m_windowStyle & wxTE_MULTILINE )
 371     {
 372         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 373     }
 374     else // single line
 375     {
 376         valueWin = value;
 377     }
 378
 379     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 380         return false;
 381
 382 #if wxUSE_RICHEDIT
 383     if ( IsRich() )
 384     {
 385         // enable the events we're interested in: we want to get EN_CHANGE as
 386         // for the normal controls
 387         LPARAM mask = ENM_CHANGE;
 388
 389         if ( GetRichVersion() == 1 )
 390         {
 391             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 392             // explained in its handler
 393            mask |= ENM_MOUSEEVENTS;
 394         }
 395         else if ( m_windowStyle & wxTE_AUTO_URL )
 396         {
 397             mask |= ENM_LINK;
 398
 399             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 400         }
 401
 402         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 403     }
 404 #endif // wxUSE_RICHEDIT
 405
 406     return true;
 407 }
 408
 409 // Make sure the window style (etc.) reflects the HWND style (roughly)
 410 void wxTextCtrl::AdoptAttributesFromHWND()
 411 {
 412     wxWindow::AdoptAttributesFromHWND();
 413
 414     HWND hWnd = GetHwnd();
 415     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 416
 417     // retrieve the style to see whether this is an edit or richedit ctrl
 418 #if wxUSE_RICHEDIT
 419     wxString classname = wxGetWindowClass(GetHWND());
 420
 421     if ( classname.IsSameAs(_T("EDIT"), false /* no case */) )
 422     {
 423         m_verRichEdit = 0;
 424     }
 425     else // rich edit?
 426     {
 427         wxChar c;
 428         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 429         {
 430             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 431
 432             m_verRichEdit = 0;
 433         }
 434     }
 435 #endif // wxUSE_RICHEDIT
 436
 437     if (style & ES_MULTILINE)
 438         m_windowStyle |= wxTE_MULTILINE;
 439     if (style & ES_PASSWORD)
 440         m_windowStyle |= wxTE_PASSWORD;
 441     if (style & ES_READONLY)
 442         m_windowStyle |= wxTE_READONLY;
 443     if (style & ES_WANTRETURN)
 444         m_windowStyle |= wxTE_PROCESS_ENTER;
 445     if (style & ES_CENTER)
 446         m_windowStyle |= wxTE_CENTRE;
 447     if (style & ES_RIGHT)
 448         m_windowStyle |= wxTE_RIGHT;
 449 }
 450
 451 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 452 {
 453     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 454
 455     // styles which we alaways add by default
 456     if ( style & wxTE_MULTILINE )
 457     {
 458         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 459                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 460
 461         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 462         if ( !(style & wxTE_NO_VSCROLL) )
 463         {
 464             // always adjust the vertical scrollbar automatically if we have it
 465             msStyle |= WS_VSCROLL | ES_AUTOVSCROLL;
 466
 467 #if wxUSE_RICHEDIT
 468             // we have to use this style for the rich edit controls because
 469             // without it the vertical scrollbar never appears at all in
 470             // richedit 3.0 because of our ECO_NOHIDESEL hack (search for it)
 471             if ( style & wxTE_RICH2 )
 472             {
 473                 msStyle |= ES_DISABLENOSCROLL;
 474             }
 475 #endif // wxUSE_RICHEDIT
 476         }
 477
 478         style |= wxTE_PROCESS_ENTER;
 479     }
 480     else // !multiline
 481     {
 482         // there is really no reason to not have this style for single line
 483         // text controls
 484         msStyle |= ES_AUTOHSCROLL;
 485     }
 486
 487     // note that wxTE_DONTWRAP is the same as wxHSCROLL so if we have a horz
 488     // scrollbar, there is no wrapping -- which makes sense
 489     if ( style & wxTE_DONTWRAP )
 490     {
 491         // automatically scroll the control horizontally as necessary
 492         //
 493         // NB: ES_AUTOHSCROLL is needed for richedit controls or they don't
 494         //     show horz scrollbar at all, even in spite of WS_HSCROLL, and as
 495         //     it doesn't seem to do any harm for plain edit controls, add it
 496         //     always
 497         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 498     }
 499
 500     if ( style & wxTE_READONLY )
 501         msStyle |= ES_READONLY;
 502
 503     if ( style & wxTE_PASSWORD )
 504         msStyle |= ES_PASSWORD;
 505
 506     if ( style & wxTE_NOHIDESEL )
 507         msStyle |= ES_NOHIDESEL;
 508
 509     // note that we can't do do "& wxTE_LEFT" as wxTE_LEFT == 0
 510     if ( style & wxTE_CENTRE )
 511         msStyle |= ES_CENTER;
 512     else if ( style & wxTE_RIGHT )
 513         msStyle |= ES_RIGHT;
 514     else
 515         msStyle |= ES_LEFT; // ES_LEFT is 0 as well but for consistency...
 516
 517     return msStyle;
 518 }
 519
 520 void wxTextCtrl::SetWindowStyleFlag(long style)
 521 {
 522 #if wxUSE_RICHEDIT
 523     // we have to deal with some styles separately because they can't be
 524     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 525     // using richedit-specific EM_SETOPTIONS
 526     if ( IsRich() &&
 527             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 528     {
 529         bool set = (style & wxTE_NOHIDESEL) != 0;
 530
 531         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 532                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 533     }
 534 #endif // wxUSE_RICHEDIT
 535
 536     wxControl::SetWindowStyleFlag(style);
 537 }
 538
 539 // ----------------------------------------------------------------------------
 540 // set/get the controls text
 541 // ----------------------------------------------------------------------------
 542
 543 wxString wxTextCtrl::GetValue() const
 544 {
 545     // range 0..-1 is special for GetRange() and means to retrieve all text
 546     return GetRange(0, -1);
 547 }
 548
 549 wxString wxTextCtrl::GetRange(long from, long to) const
 550 {
 551     wxString str;
 552
 553     if ( from >= to && to != -1 )
 554     {
 555         // nothing to retrieve
 556         return str;
 557     }
 558
 559 #if wxUSE_RICHEDIT
 560     if ( IsRich() )
 561     {
 562         int len = GetWindowTextLength(GetHwnd());
 563         if ( len > from )
 564         {
 565             if ( to == -1 )
 566                 to = len;
 567
 568 #if !wxUSE_UNICODE
 569             // we must use EM_STREAMOUT if we don't want to lose all characters
 570             // not representable in the current character set (EM_GETTEXTRANGE
 571             // simply replaces them with question marks...)
 572             if ( GetRichVersion() > 1 )
 573             {
 574                 // we must have some encoding, otherwise any 8bit chars in the
 575                 // control are simply *lost* (replaced by '?')
 576                 wxFontEncoding encoding = wxFONTENCODING_SYSTEM;
 577
 578                 wxFont font = m_defaultStyle.GetFont();
 579                 if ( !font.Ok() )
 580                     font = GetFont();
 581
 582                 if ( font.Ok() )
 583                 {
 584                    encoding = font.GetEncoding();
 585                 }
 586
 587                 if ( encoding == wxFONTENCODING_SYSTEM )
 588                 {
 589                     encoding = wxLocale::GetSystemEncoding();
 590                 }
 591
 592                 if ( encoding == wxFONTENCODING_SYSTEM )
 593                 {
 594                     encoding = wxFONTENCODING_ISO8859_1;
 595                 }
 596
 597                 str = StreamOut(encoding);
 598
 599                 if ( !str.empty() )
 600                 {
 601                     // we have to manually extract the required part, luckily
 602                     // this is easy in this case as EOL characters in str are
 603                     // just LFs because we remove CRs in wxRichEditStreamOut
 604                     str = str.Mid(from, to - from);
 605                 }
 606             }
 607
 608             // StreamOut() wasn't used or failed, try to do it in normal way
 609             if ( str.empty() )
 610 #endif // !wxUSE_UNICODE
 611             {
 612                 // alloc one extra WORD as needed by the control
 613                 wxStringBuffer tmp(str, ++len);
 614                 wxChar *p = tmp;
 615
 616                 TEXTRANGE textRange;
 617                 textRange.chrg.cpMin = from;
 618                 textRange.chrg.cpMax = to;
 619                 textRange.lpstrText = p;
 620
 621                 (void)::SendMessage(GetHwnd(), EM_GETTEXTRANGE,
 622                                     0, (LPARAM)&textRange);
 623
 624                 if ( m_verRichEdit > 1 )
 625                 {
 626                     // RichEdit 2.0 uses just CR ('\r') for the
 627                     // newlines which is neither Unix nor Windows
 628                     // style - convert it to something reasonable
 629                     for ( ; *p; p++ )
 630                     {
 631                         if ( *p == _T('\r') )
 632                             *p = _T('\n');
 633                     }
 634                 }
 635             }
 636
 637             if ( m_verRichEdit == 1 )
 638             {
 639                 // convert to the canonical form - see comment below
 640                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 641             }
 642         }
 643         //else: no text at all, leave the string empty
 644     }
 645     else
 646 #endif // wxUSE_RICHEDIT
 647     {
 648         // retrieve all text
 649         str = wxGetWindowText(GetHWND());
 650
 651         // need only a range?
 652         if ( from < to )
 653         {
 654             str = str.Mid(from, to - from);
 655         }
 656
 657         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 658         // canonical one (same one as above) for consistency with the other kinds
 659         // of controls and, more importantly, with the other ports
 660         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 661     }
 662
 663     return str;
 664 }
 665
 666 void wxTextCtrl::SetValue(const wxString& value)
 667 {
 668     // if the text is long enough, it's faster to just set it instead of first
 669     // comparing it with the old one (chances are that it will be different
 670     // anyhow, this comparison is there to avoid flicker for small single-line
 671     // edit controls mostly)
 672     if ( (value.length() > 0x400) || (value != GetValue()) )
 673     {
 674         DoWriteText(value, false /* not selection only */);
 675
 676         // for compatibility, don't move the cursor when doing SetValue()
 677         SetInsertionPoint(0);
 678     }
 679     else // same text
 680     {
 681         // still send an event for consistency
 682         SendUpdateEvent();
 683     }
 684
 685     // we should reset the modified flag even if the value didn't really change
 686
 687     // mark the control as being not dirty - we changed its text, not the
 688     // user
 689     DiscardEdits();
 690 }
 691
 692 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 693
 694 // TODO: using memcpy() would improve performance a lot for big amounts of text
 695
 696 DWORD CALLBACK
 697 wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 698 {
 699     *pcb = 0;
 700
 701     const wchar_t ** const ppws = (const wchar_t **)dwCookie;
 702
 703     wchar_t *wbuf = (wchar_t *)buf;
 704     const wchar_t *wpc = *ppws;
 705     while ( cb && *wpc )
 706     {
 707         *wbuf++ = *wpc++;
 708
 709         cb -= sizeof(wchar_t);
 710         (*pcb) += sizeof(wchar_t);
 711     }
 712
 713     *ppws = wpc;
 714
 715     return 0;
 716 }
 717
 718 // helper struct used to pass parameters from wxTextCtrl to wxRichEditStreamOut
 719 struct wxStreamOutData
 720 {
 721     wchar_t *wpc;
 722     size_t len;
 723 };
 724
 725 DWORD CALLBACK
 726 wxRichEditStreamOut(DWORD_PTR dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 727 {
 728     *pcb = 0;
 729
 730     wxStreamOutData *data = (wxStreamOutData *)dwCookie;
 731
 732     const wchar_t *wbuf = (const wchar_t *)buf;
 733     wchar_t *wpc = data->wpc;
 734     while ( cb )
 735     {
 736         wchar_t wch = *wbuf++;
 737
 738         // turn "\r\n" into "\n" on the fly
 739         if ( wch != L'\r' )
 740             *wpc++ = wch;
 741         else
 742             data->len--;
 743
 744         cb -= sizeof(wchar_t);
 745         (*pcb) += sizeof(wchar_t);
 746     }
 747
 748     data->wpc = wpc;
 749
 750     return 0;
 751 }
 752
 753
 754 #if wxUSE_UNICODE_MSLU
 755     #define UNUSED_IF_MSLU(param)
 756 #else
 757     #define UNUSED_IF_MSLU(param) param
 758 #endif
 759
 760 bool
 761 wxTextCtrl::StreamIn(const wxString& value,
 762                      wxFontEncoding UNUSED_IF_MSLU(encoding),
 763                      bool selectionOnly)
 764 {
 765 #if wxUSE_UNICODE_MSLU
 766     const wchar_t *wpc = value.c_str();
 767 #else // !wxUSE_UNICODE_MSLU
 768     wxCSConv conv(encoding);
 769
 770     const size_t len = conv.MB2WC(NULL, value, value.length());
 771
 772 #if wxUSE_WCHAR_T
 773     wxWCharBuffer wchBuf(len);
 774     wchar_t *wpc = wchBuf.data();
 775 #else
 776     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 777     wchar_t *wpc = wchBuf;
 778 #endif
 779
 780     conv.MB2WC(wpc, value, value.length());
 781 #endif // wxUSE_UNICODE_MSLU
 782
 783     // finally, stream it in the control
 784     EDITSTREAM eds;
 785     wxZeroMemory(eds);
 786     eds.dwCookie = (DWORD)&wpc;
 787     // the cast below is needed for broken (very) old mingw32 headers
 788     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 789
 790     // same problem as in DoWriteText(): we can get multiple events here
 791     UpdatesCountFilter ucf(m_updatesCount);
 792
 793     ::SendMessage(GetHwnd(), EM_STREAMIN,
 794                   SF_TEXT |
 795                   SF_UNICODE |
 796                   (selectionOnly ? SFF_SELECTION : 0),
 797                   (LPARAM)&eds);
 798
 799     wxASSERT_MSG( ucf.GotUpdate(), _T("EM_STREAMIN didn't send EN_UPDATE?") );
 800
 801     if ( eds.dwError )
 802     {
 803         wxLogLastError(_T("EM_STREAMIN"));
 804     }
 805
 806 #if !wxUSE_WCHAR_T
 807     free(wchBuf);
 808 #endif // !wxUSE_WCHAR_T
 809
 810     return true;
 811 }
 812
 813 #if !wxUSE_UNICODE_MSLU
 814
 815 wxString
 816 wxTextCtrl::StreamOut(wxFontEncoding encoding, bool selectionOnly) const
 817 {
 818     wxString out;
 819
 820     const int len = GetWindowTextLength(GetHwnd());
 821
 822 #if wxUSE_WCHAR_T
 823     wxWCharBuffer wchBuf(len);
 824     wchar_t *wpc = wchBuf.data();
 825 #else
 826     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 827     wchar_t *wpc = wchBuf;
 828 #endif
 829
 830     wxStreamOutData data;
 831     data.wpc = wpc;
 832     data.len = len;
 833
 834     EDITSTREAM eds;
 835     wxZeroMemory(eds);
 836     eds.dwCookie = (DWORD)&data;
 837     eds.pfnCallback = wxRichEditStreamOut;
 838
 839     ::SendMessage
 840       (
 841         GetHwnd(),
 842         EM_STREAMOUT,
 843         SF_TEXT | SF_UNICODE | (selectionOnly ? SFF_SELECTION : 0),
 844         (LPARAM)&eds
 845       );
 846
 847     if ( eds.dwError )
 848     {
 849         wxLogLastError(_T("EM_STREAMOUT"));
 850     }
 851     else // streamed out ok
 852     {
 853         // NUL-terminate the string because its length could have been
 854         // decreased by wxRichEditStreamOut
 855         *(wchBuf.data() + data.len) = L'\0';
 856
 857         // now convert to the given encoding (this is a possibly lossful
 858         // conversion but what else can we do)
 859         wxCSConv conv(encoding);
 860         size_t lenNeeded = conv.WC2MB(NULL, wchBuf, 0);
 861         if ( lenNeeded++ )
 862         {
 863             conv.WC2MB(wxStringBuffer(out, lenNeeded), wchBuf, lenNeeded);
 864         }
 865     }
 866
 867 #if !wxUSE_WCHAR_T
 868     free(wchBuf);
 869 #endif // !wxUSE_WCHAR_T
 870
 871     return out;
 872 }
 873
 874 #endif // !wxUSE_UNICODE_MSLU
 875
 876 #endif // wxUSE_RICHEDIT
 877
 878 void wxTextCtrl::WriteText(const wxString& value)
 879 {
 880     DoWriteText(value);
 881 }
 882
 883 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 884 {
 885     wxString valueDos;
 886     if ( m_windowStyle & wxTE_MULTILINE )
 887         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 888     else
 889         valueDos = value;
 890
 891 #if wxUSE_RICHEDIT
 892     // there are several complications with the rich edit controls here
 893     bool done = false;
 894     if ( IsRich() )
 895     {
 896         // first, ensure that the new text will be in the default style
 897         if ( !m_defaultStyle.IsDefault() )
 898         {
 899             long start, end;
 900             GetSelection(&start, &end);
 901             SetStyle(start, end, m_defaultStyle);
 902         }
 903
 904 #if wxUSE_UNICODE_MSLU
 905         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 906         // but EM_STREAMIN works
 907         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 908         {
 909            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 910         }
 911 #endif // wxUSE_UNICODE_MSLU
 912
 913 #if !wxUSE_UNICODE
 914         // next check if the text we're inserting must be shown in a non
 915         // default charset -- this only works for RichEdit > 1.0
 916         if ( GetRichVersion() > 1 )
 917         {
 918             wxFont font = m_defaultStyle.GetFont();
 919             if ( !font.Ok() )
 920                 font = GetFont();
 921
 922             if ( font.Ok() )
 923             {
 924                wxFontEncoding encoding = font.GetEncoding();
 925                if ( encoding != wxFONTENCODING_SYSTEM )
 926                {
 927                    // we have to use EM_STREAMIN to force richedit control 2.0+
 928                    // to show any text in the non default charset -- otherwise
 929                    // it thinks it knows better than we do and always shows it
 930                    // in the default one
 931                    done = StreamIn(valueDos, encoding, selectionOnly);
 932                }
 933             }
 934         }
 935 #endif // !wxUSE_UNICODE
 936     }
 937
 938     if ( !done )
 939 #endif // wxUSE_RICHEDIT
 940     {
 941         // in some cases we get 2 EN_CHANGE notifications after the SendMessage
 942         // call (this happens for plain EDITs with EM_REPLACESEL and under some
 943         // -- undetermined -- conditions with rich edit) and sometimes we don't
 944         // get any events at all (plain EDIT with WM_SETTEXT), so ensure that
 945         // we generate exactly one of them by ignoring all but the first one in
 946         // SendUpdateEvent() and generating one ourselves if we hadn't got any
 947         // notifications from Windows
 948         UpdatesCountFilter ucf(m_updatesCount);
 949
 950         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
 951                       0, (LPARAM)valueDos.c_str());
 952
 953         if ( !ucf.GotUpdate() )
 954         {
 955             SendUpdateEvent();
 956         }
 957     }
 958 }
 959
 960 void wxTextCtrl::AppendText(const wxString& text)
 961 {
 962     SetInsertionPointEnd();
 963
 964     WriteText(text);
 965
 966 #if wxUSE_RICHEDIT
 967     // don't do this if we're frozen, saves some time
 968     if ( !IsFrozen() && IsMultiLine() && GetRichVersion() > 1 )
 969     {
 970         // setting the caret to the end and showing it simply doesn't work for
 971         // RichEdit 2.0 -- force it to still do what we want
 972         ::SendMessage(GetHwnd(), EM_LINESCROLL, 0, GetNumberOfLines());
 973     }
 974 #endif // wxUSE_RICHEDIT
 975 }
 976
 977 void wxTextCtrl::Clear()
 978 {
 979     ::SetWindowText(GetHwnd(), wxEmptyString);
 980
 981 #if wxUSE_RICHEDIT
 982     if ( !IsRich() )
 983 #endif // wxUSE_RICHEDIT
 984     {
 985         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
 986         // but the normal ones don't -- make Clear() behaviour consistent by
 987         // always sending this event
 988
 989         // Windows already sends an update event for single-line
 990         // controls.
 991         if ( m_windowStyle & wxTE_MULTILINE )
 992             SendUpdateEvent();
 993     }
 994 }
 995
 996 #ifdef __WIN32__
 997
 998 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 999 {
1000     SetFocus();
1001
1002     size_t lenOld = GetValue().length();
1003
1004     wxUint32 code = event.GetRawKeyCode();
1005     ::keybd_event((BYTE)code, 0, 0 /* key press */, 0);
1006     ::keybd_event((BYTE)code, 0, KEYEVENTF_KEYUP, 0);
1007
1008     // assume that any alphanumeric key changes the total number of characters
1009     // in the control - this should work in 99% of cases
1010     return GetValue().length() != lenOld;
1011 }
1012
1013 #endif // __WIN32__
1014
1015 // ----------------------------------------------------------------------------
1016 // Clipboard operations
1017 // ----------------------------------------------------------------------------
1018
1019 void wxTextCtrl::Copy()
1020 {
1021     if (CanCopy())
1022     {
1023         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
1024     }
1025 }
1026
1027 void wxTextCtrl::Cut()
1028 {
1029     if (CanCut())
1030     {
1031         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
1032     }
1033 }
1034
1035 void wxTextCtrl::Paste()
1036 {
1037     if (CanPaste())
1038     {
1039         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
1040     }
1041 }
1042
1043 bool wxTextCtrl::HasSelection() const
1044 {
1045     long from, to;
1046     GetSelection(&from, &to);
1047     return from != to;
1048 }
1049
1050 bool wxTextCtrl::CanCopy() const
1051 {
1052     // Can copy if there's a selection
1053     return HasSelection();
1054 }
1055
1056 bool wxTextCtrl::CanCut() const
1057 {
1058     return CanCopy() && IsEditable();
1059 }
1060
1061 bool wxTextCtrl::CanPaste() const
1062 {
1063     if ( !IsEditable() )
1064         return false;
1065
1066 #if wxUSE_RICHEDIT
1067     if ( IsRich() )
1068     {
1069         UINT cf = 0; // 0 == any format
1070
1071         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
1072     }
1073 #endif // wxUSE_RICHEDIT
1074
1075     // Standard edit control: check for straight text on clipboard
1076     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
1077         return false;
1078
1079     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
1080     ::CloseClipboard();
1081
1082     return isTextAvailable;
1083 }
1084
1085 // ----------------------------------------------------------------------------
1086 // Accessors
1087 // ----------------------------------------------------------------------------
1088
1089 void wxTextCtrl::SetEditable(bool editable)
1090 {
1091     HWND hWnd = GetHwnd();
1092     ::SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
1093 }
1094
1095 void wxTextCtrl::SetInsertionPoint(long pos)
1096 {
1097     DoSetSelection(pos, pos);
1098 }
1099
1100 void wxTextCtrl::SetInsertionPointEnd()
1101 {
1102     // we must not do anything if the caret is already there because calling
1103     // SetInsertionPoint() thaws the controls if Freeze() had been called even
1104     // if it doesn't actually move the caret anywhere and so the simple fact of
1105     // doing it results in horrible flicker when appending big amounts of text
1106     // to the control in a few chunks (see DoAddText() test in the text sample)
1107     if ( GetInsertionPoint() == GetLastPosition() )
1108     {
1109         return;
1110     }
1111
1112     long pos;
1113
1114 #if wxUSE_RICHEDIT
1115     if ( m_verRichEdit == 1 )
1116     {
1117         // we don't have to waste time calling GetLastPosition() in this case
1118         pos = -1;
1119     }
1120     else // !RichEdit 1.0
1121 #endif // wxUSE_RICHEDIT
1122     {
1123         pos = GetLastPosition();
1124     }
1125
1126     SetInsertionPoint(pos);
1127 }
1128
1129 long wxTextCtrl::GetInsertionPoint() const
1130 {
1131 #if wxUSE_RICHEDIT
1132     if ( IsRich() )
1133     {
1134         CHARRANGE range;
1135         range.cpMin = 0;
1136         range.cpMax = 0;
1137         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
1138         return range.cpMin;
1139     }
1140 #endif // wxUSE_RICHEDIT
1141
1142     DWORD Pos = (DWORD)::SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
1143     return Pos & 0xFFFF;
1144 }
1145
1146 wxTextPos wxTextCtrl::GetLastPosition() const
1147 {
1148     int numLines = GetNumberOfLines();
1149     long posStartLastLine = XYToPosition(0, numLines - 1);
1150
1151     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
1152
1153     return posStartLastLine + lenLastLine;
1154 }
1155
1156 // If the return values from and to are the same, there is no
1157 // selection.
1158 void wxTextCtrl::GetSelection(long* from, long* to) const
1159 {
1160 #if wxUSE_RICHEDIT
1161     if ( IsRich() )
1162     {
1163         CHARRANGE charRange;
1164         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
1165
1166         *from = charRange.cpMin;
1167         *to = charRange.cpMax;
1168     }
1169     else
1170 #endif // !wxUSE_RICHEDIT
1171     {
1172         DWORD dwStart, dwEnd;
1173         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
1174
1175         *from = dwStart;
1176         *to = dwEnd;
1177     }
1178 }
1179
1180 bool wxTextCtrl::IsEditable() const
1181 {
1182     // strangely enough, we may be called before the control is created: our
1183     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
1184     // us
1185     if ( !m_hWnd )
1186         return true;
1187
1188     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1189
1190     return (style & ES_READONLY) == 0;
1191 }
1192
1193 // ----------------------------------------------------------------------------
1194 // selection
1195 // ----------------------------------------------------------------------------
1196
1197 void wxTextCtrl::SetSelection(long from, long to)
1198 {
1199     // if from and to are both -1, it means (in wxWidgets) that all text should
1200     // be selected - translate into Windows convention
1201     if ( (from == -1) && (to == -1) )
1202     {
1203         from = 0;
1204         to = -1;
1205     }
1206
1207     DoSetSelection(from, to);
1208 }
1209
1210 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
1211 {
1212     HWND hWnd = GetHwnd();
1213
1214 #if wxUSE_RICHEDIT
1215     if ( IsRich() )
1216     {
1217         CHARRANGE range;
1218         range.cpMin = from;
1219         range.cpMax = to;
1220         ::SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
1221     }
1222     else
1223 #endif // wxUSE_RICHEDIT
1224     {
1225         ::SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
1226     }
1227
1228     if ( scrollCaret && !IsFrozen() )
1229     {
1230 #if wxUSE_RICHEDIT
1231         // richedit 3.0 (i.e. the version living in riched20.dll distributed
1232         // with Windows 2000 and beyond) doesn't honour EM_SCROLLCARET when
1233         // emulating richedit 2.0 unless the control has focus or ECO_NOHIDESEL
1234         // option is set (but it does work ok in richedit 1.0 mode...)
1235         //
1236         // so to make it work we either need to give focus to it here which
1237         // will probably create many problems (dummy focus events; window
1238         // containing the text control being brought to foreground
1239         // unexpectedly; ...) or to temporarily set ECO_NOHIDESEL which may
1240         // create other problems too -- and in fact it does because if we turn
1241         // on/off this style while appending the text to the control, the
1242         // vertical scrollbar never appears in it even if we append tons of
1243         // text and to work around this the only solution I found was to use
1244         // ES_DISABLENOSCROLL
1245         //
1246         // this is very ugly but I don't see any other way to make this work
1247         if ( GetRichVersion() > 1 )
1248         {
1249             if ( !HasFlag(wxTE_NOHIDESEL) )
1250             {
1251                 ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1252                               ECOOP_OR, ECO_NOHIDESEL);
1253             }
1254             //else: everything is already ok
1255         }
1256 #endif // wxUSE_RICHEDIT
1257
1258         ::SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
1259
1260 #if wxUSE_RICHEDIT
1261         // restore ECO_NOHIDESEL if we changed it
1262         if ( GetRichVersion() > 1 && !HasFlag(wxTE_NOHIDESEL) )
1263         {
1264             ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1265                           ECOOP_AND, ~ECO_NOHIDESEL);
1266         }
1267 #endif // wxUSE_RICHEDIT
1268     }
1269 }
1270
1271 // ----------------------------------------------------------------------------
1272 // Working with files
1273 // ----------------------------------------------------------------------------
1274
1275 bool wxTextCtrl::LoadFile(const wxString& file)
1276 {
1277     if ( wxTextCtrlBase::LoadFile(file) )
1278     {
1279         // update the size limit if needed
1280         AdjustSpaceLimit();
1281
1282         return true;
1283     }
1284
1285     return false;
1286 }
1287
1288 // ----------------------------------------------------------------------------
1289 // Editing
1290 // ----------------------------------------------------------------------------
1291
1292 void wxTextCtrl::Replace(long from, long to, const wxString& value)
1293 {
1294     // Set selection and remove it
1295     DoSetSelection(from, to, false /* don't scroll caret into view */);
1296
1297     DoWriteText(value, true /* selection only */);
1298 }
1299
1300 void wxTextCtrl::Remove(long from, long to)
1301 {
1302     Replace(from, to, wxEmptyString);
1303 }
1304
1305 bool wxTextCtrl::IsModified() const
1306 {
1307     return ::SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1308 }
1309
1310 void wxTextCtrl::MarkDirty()
1311 {
1312     ::SendMessage(GetHwnd(), EM_SETMODIFY, TRUE, 0L);
1313 }
1314
1315 void wxTextCtrl::DiscardEdits()
1316 {
1317     ::SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
1318 }
1319
1320 int wxTextCtrl::GetNumberOfLines() const
1321 {
1322     return (int)::SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
1323 }
1324
1325 // ----------------------------------------------------------------------------
1326 // Positions <-> coords
1327 // ----------------------------------------------------------------------------
1328
1329 long wxTextCtrl::XYToPosition(long x, long y) const
1330 {
1331     // This gets the char index for the _beginning_ of this line
1332     long charIndex = ::SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
1333
1334     return charIndex + x;
1335 }
1336
1337 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1338 {
1339     HWND hWnd = GetHwnd();
1340
1341     // This gets the line number containing the character
1342     long lineNo;
1343 #if wxUSE_RICHEDIT
1344     if ( IsRich() )
1345     {
1346         lineNo = ::SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1347     }
1348     else
1349 #endif // wxUSE_RICHEDIT
1350     {
1351         lineNo = ::SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1352     }
1353
1354     if ( lineNo == -1 )
1355     {
1356         // no such line
1357         return false;
1358     }
1359
1360     // This gets the char index for the _beginning_ of this line
1361     long charIndex = ::SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1362     if ( charIndex == -1 )
1363     {
1364         return false;
1365     }
1366
1367     // The X position must therefore be the different between pos and charIndex
1368     if ( x )
1369         *x = pos - charIndex;
1370     if ( y )
1371         *y = lineNo;
1372
1373     return true;
1374 }
1375
1376 wxTextCtrlHitTestResult
1377 wxTextCtrl::HitTest(const wxPoint& pt, long *posOut) const
1378 {
1379     // first get the position from Windows
1380     LPARAM lParam;
1381
1382 #if wxUSE_RICHEDIT
1383     POINTL ptl;
1384     if ( IsRich() )
1385     {
1386         // for rich edit controls the position is passed iva the struct fields
1387         ptl.x = pt.x;
1388         ptl.y = pt.y;
1389         lParam = (LPARAM)&ptl;
1390     }
1391     else
1392 #endif // wxUSE_RICHEDIT
1393     {
1394         // for the plain ones, we are limited to 16 bit positions which are
1395         // combined in a single 32 bit value
1396         lParam = MAKELPARAM(pt.x, pt.y);
1397     }
1398
1399     LRESULT pos = ::SendMessage(GetHwnd(), EM_CHARFROMPOS, 0, lParam);
1400
1401     if ( pos == -1 )
1402     {
1403         // this seems to indicate an error...
1404         return wxTE_HT_UNKNOWN;
1405     }
1406
1407 #if wxUSE_RICHEDIT
1408     if ( !IsRich() )
1409 #endif // wxUSE_RICHEDIT
1410     {
1411         // for plain EDIT controls the higher word contains something else
1412         pos = LOWORD(pos);
1413     }
1414
1415
1416     // next determine where it is relatively to our point: EM_CHARFROMPOS
1417     // always returns the closest character but we need to be more precise, so
1418     // double check that we really are where it pretends
1419     POINTL ptReal;
1420
1421 #if wxUSE_RICHEDIT
1422     // FIXME: we need to distinguish between richedit 2 and 3 here somehow but
1423     //        we don't know how to do it
1424     if ( IsRich() )
1425     {
1426         ::SendMessage(GetHwnd(), EM_POSFROMCHAR, (WPARAM)&ptReal, pos);
1427     }
1428     else
1429 #endif // wxUSE_RICHEDIT
1430     {
1431         LRESULT lRc = ::SendMessage(GetHwnd(), EM_POSFROMCHAR, pos, 0);
1432
1433         if ( lRc == -1 )
1434         {
1435             // this is apparently returned when pos corresponds to the last
1436             // position
1437             ptReal.x =
1438             ptReal.y = 0;
1439         }
1440         else
1441         {
1442             ptReal.x = LOWORD(lRc);
1443             ptReal.y = HIWORD(lRc);
1444         }
1445     }
1446
1447     wxTextCtrlHitTestResult rc;
1448
1449     if ( pt.y > ptReal.y + GetCharHeight() )
1450         rc = wxTE_HT_BELOW;
1451     else if ( pt.x > ptReal.x + GetCharWidth() )
1452         rc = wxTE_HT_BEYOND;
1453     else
1454         rc = wxTE_HT_ON_TEXT;
1455
1456     if ( posOut )
1457         *posOut = pos;
1458
1459     return rc;
1460 }
1461
1462 // ----------------------------------------------------------------------------
1463 //
1464 // ----------------------------------------------------------------------------
1465
1466 void wxTextCtrl::ShowPosition(long pos)
1467 {
1468     HWND hWnd = GetHwnd();
1469
1470     // To scroll to a position, we pass the number of lines and characters
1471     // to scroll *by*. This means that we need to:
1472     // (1) Find the line position of the current line.
1473     // (2) Find the line position of pos.
1474     // (3) Scroll by (pos - current).
1475     // For now, ignore the horizontal scrolling.
1476
1477     // Is this where scrolling is relative to - the line containing the caret?
1478     // Or is the first visible line??? Try first visible line.
1479 //    int currentLineLineNo1 = (int)::SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1480
1481     int currentLineLineNo = (int)::SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1482
1483     int specifiedLineLineNo = (int)::SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1484
1485     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1486
1487     if (linesToScroll != 0)
1488       (void)::SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1489 }
1490
1491 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1492 {
1493     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1494 }
1495
1496 int wxTextCtrl::GetLineLength(long lineNo) const
1497 {
1498     long pos = XYToPosition(0, lineNo);
1499
1500     return GetLengthOfLineContainingPos(pos);
1501 }
1502
1503 wxString wxTextCtrl::GetLineText(long lineNo) const
1504 {
1505     size_t len = (size_t)GetLineLength(lineNo) + 1;
1506
1507     // there must be at least enough place for the length WORD in the
1508     // buffer
1509     len += sizeof(WORD);
1510
1511     wxString str;
1512     {
1513         wxStringBufferLength tmp(str, len);
1514         wxChar *buf = tmp;
1515
1516         *(WORD *)buf = (WORD)len;
1517         len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1518
1519 #if wxUSE_RICHEDIT
1520         if ( IsRich() )
1521         {
1522             // remove the '\r' returned by the rich edit control, the user code
1523             // should never see it
1524             if ( buf[len - 2] == _T('\r') && buf[len - 1] == _T('\n') )
1525             {
1526                 buf[len - 2] = _T('\n');
1527                 len--;
1528             }
1529         }
1530 #endif // wxUSE_RICHEDIT
1531
1532         // remove the '\n' at the end, if any (this is how this function is
1533         // supposed to work according to the docs)
1534         if ( buf[len - 1] == _T('\n') )
1535         {
1536             len--;
1537         }
1538
1539         buf[len] = 0;
1540         tmp.SetLength(len);
1541     }
1542
1543     return str;
1544 }
1545
1546 void wxTextCtrl::SetMaxLength(unsigned long len)
1547 {
1548 #if wxUSE_RICHEDIT
1549     if (IsRich())
1550         ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, (LPARAM) (DWORD) len);
1551     else
1552 #endif
1553     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1554 }
1555
1556 // ----------------------------------------------------------------------------
1557 // Undo/redo
1558 // ----------------------------------------------------------------------------
1559
1560 void wxTextCtrl::Undo()
1561 {
1562     if (CanUndo())
1563     {
1564         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1565     }
1566 }
1567
1568 void wxTextCtrl::Redo()
1569 {
1570     if (CanRedo())
1571     {
1572 #if wxUSE_RICHEDIT
1573         if (GetRichVersion() > 1)
1574             ::SendMessage(GetHwnd(), EM_REDO, 0, 0);
1575         else
1576 #endif
1577         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1578         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1579     }
1580 }
1581
1582 bool wxTextCtrl::CanUndo() const
1583 {
1584     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1585 }
1586
1587 bool wxTextCtrl::CanRedo() const
1588 {
1589 #if wxUSE_RICHEDIT
1590     if (GetRichVersion() > 1)
1591         return ::SendMessage(GetHwnd(), EM_CANREDO, 0, 0) != 0;
1592     else
1593 #endif
1594     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1595 }
1596
1597 // ----------------------------------------------------------------------------
1598 // caret handling (Windows only)
1599 // ----------------------------------------------------------------------------
1600
1601 bool wxTextCtrl::ShowNativeCaret(bool show)
1602 {
1603     if ( show != m_isNativeCaretShown )
1604     {
1605         if ( !(show ? ::ShowCaret(GetHwnd()) : ::HideCaret(GetHwnd())) )
1606         {
1607             // not an error, may simply indicate that it's not shown/hidden
1608             // yet (i.e. it had been hidden/showh 2 times before)
1609             return false;
1610         }
1611
1612         m_isNativeCaretShown = show;
1613     }
1614
1615     return true;
1616 }
1617
1618 // ----------------------------------------------------------------------------
1619 // implemenation details
1620 // ----------------------------------------------------------------------------
1621
1622 void wxTextCtrl::Command(wxCommandEvent & event)
1623 {
1624     SetValue(event.GetString());
1625     ProcessCommand (event);
1626 }
1627
1628 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1629 {
1630     // By default, load the first file into the text window.
1631     if (event.GetNumberOfFiles() > 0)
1632     {
1633         LoadFile(event.GetFiles()[0]);
1634     }
1635 }
1636
1637 // ----------------------------------------------------------------------------
1638 // kbd input processing
1639 // ----------------------------------------------------------------------------
1640
1641 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1642 {
1643     MSG *msg = (MSG *)pMsg;
1644
1645     // check for our special keys here: if we don't do it and the parent frame
1646     // uses them as accelerators, they wouldn't work at all, so we disable
1647     // usual preprocessing for them
1648     if ( msg->message == WM_KEYDOWN )
1649     {
1650         WORD vkey = (WORD) msg->wParam;
1651         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1652         {
1653             if ( vkey == VK_BACK )
1654                 return false;
1655         }
1656         else // no Alt
1657         {
1658             // we want to process some Ctrl-foo and Shift-bar but no key
1659             // combinations without either Ctrl or Shift nor with both of them
1660             // pressed
1661             const int ctrl = wxIsCtrlDown(),
1662                       shift = wxIsShiftDown();
1663             switch ( ctrl + shift )
1664             {
1665                 default:
1666                     wxFAIL_MSG( _T("how many modifiers have we got?") );
1667                     // fall through
1668
1669                 case 0:
1670                 case 2:
1671                     break;
1672
1673                 case 1:
1674                     // either Ctrl or Shift pressed
1675                     if ( ctrl )
1676                     {
1677                         switch ( vkey )
1678                         {
1679                             case 'C':
1680                             case 'V':
1681                             case 'X':
1682                             case VK_INSERT:
1683                             case VK_DELETE:
1684                             case VK_HOME:
1685                             case VK_END:
1686                                 return false;
1687                         }
1688                     }
1689                     else // Shift is pressed
1690                     {
1691                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1692                             return false;
1693                     }
1694             }
1695         }
1696     }
1697
1698     return wxControl::MSWShouldPreProcessMessage(pMsg);
1699 }
1700
1701 void wxTextCtrl::OnChar(wxKeyEvent& event)
1702 {
1703     switch ( event.GetKeyCode() )
1704     {
1705         case WXK_RETURN:
1706             if ( !HasFlag(wxTE_MULTILINE) )
1707             {
1708                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1709                 InitCommandEvent(event);
1710                 event.SetString(GetValue());
1711                 if ( GetEventHandler()->ProcessEvent(event) )
1712                     return;
1713             }
1714             //else: multiline controls need Enter for themselves
1715
1716             break;
1717
1718         case WXK_TAB:
1719             // ok, so this is getting absolutely ridiculous but I don't see
1720             // any other way to fix this bug: when a multiline text control is
1721             // inside a wxFrame, we need to generate the navigation event as
1722             // otherwise nothing happens at all, but when the same control is
1723             // created inside a dialog, IsDialogMessage() *does* switch focus
1724             // all by itself and so if we do it here as well, it is advanced
1725             // twice and goes to the next control... to prevent this from
1726             // happening we're doing this ugly check, the logic being that if
1727             // we don't have focus then it had been already changed to the next
1728             // control
1729             //
1730             // the right thing to do would, of course, be to understand what
1731             // the hell is IsDialogMessage() doing but this is beyond my feeble
1732             // forces at the moment unfortunately
1733             if ( !(m_windowStyle & wxTE_PROCESS_TAB))
1734             {
1735                 if ( FindFocus() == this )
1736                 {
1737                     int flags = 0;
1738                     if (!event.ShiftDown())
1739                         flags |= wxNavigationKeyEvent::IsForward ;
1740                     if (event.ControlDown())
1741                         flags |= wxNavigationKeyEvent::WinChange ;
1742                     if (Navigate(flags))
1743                         return;
1744                 }
1745             }
1746             else
1747             {
1748                 // Insert tab since calling the default Windows handler
1749                 // doesn't seem to do it
1750                 WriteText(wxT("\t"));
1751             }
1752             break;
1753     }
1754
1755     // no, we didn't process it
1756     event.Skip();
1757 }
1758
1759 WXLRESULT wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1760 {
1761     WXLRESULT lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1762
1763     if ( nMsg == WM_GETDLGCODE )
1764     {
1765         // we always want the chars and the arrows: the arrows for navigation
1766         // and the chars because we want Ctrl-C to work even in a read only
1767         // control
1768         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1769
1770         if ( IsEditable() )
1771         {
1772             // we may have several different cases:
1773             // 1. normal case: both TAB and ENTER are used for dlg navigation
1774             // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1775             //    next control in the dialog
1776             // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1777             //    navigation
1778             // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to go
1779             //    to the next control
1780
1781             // the multiline edit control should always get <Return> for itself
1782             if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1783                 lDlgCode |= DLGC_WANTMESSAGE;
1784
1785             if ( HasFlag(wxTE_PROCESS_TAB) )
1786                 lDlgCode |= DLGC_WANTTAB;
1787
1788             lRc |= lDlgCode;
1789         }
1790         else // !editable
1791         {
1792             // NB: use "=", not "|=" as the base class version returns the
1793             //     same flags is this state as usual (i.e. including
1794             //     DLGC_WANTMESSAGE). This is strange (how does it work in the
1795             //     native Win32 apps?) but for now live with it.
1796             lRc = lDlgCode;
1797         }
1798     }
1799
1800     return lRc;
1801 }
1802
1803 // ----------------------------------------------------------------------------
1804 // text control event processing
1805 // ----------------------------------------------------------------------------
1806
1807 bool wxTextCtrl::SendUpdateEvent()
1808 {
1809     switch ( m_updatesCount )
1810     {
1811         case 0:
1812             // remember that we've got an update
1813             m_updatesCount++;
1814             break;
1815
1816         case 1:
1817             // we had already sent one event since the last control modification
1818             return false;
1819
1820         default:
1821             wxFAIL_MSG( _T("unexpected wxTextCtrl::m_updatesCount value") );
1822             // fall through
1823
1824         case -1:
1825             // we hadn't updated the control ourselves, this event comes from
1826             // the user, don't need to ignore it nor update the count
1827             break;
1828     }
1829
1830     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1831     InitCommandEvent(event);
1832
1833     return ProcessCommand(event);
1834 }
1835
1836 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1837 {
1838     switch ( param )
1839     {
1840         case EN_SETFOCUS:
1841         case EN_KILLFOCUS:
1842             {
1843                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1844                                                          : wxEVT_SET_FOCUS,
1845                                    m_windowId);
1846                 event.SetEventObject(this);
1847                 GetEventHandler()->ProcessEvent(event);
1848             }
1849             break;
1850
1851         case EN_CHANGE:
1852             SendUpdateEvent();
1853             break;
1854
1855         case EN_MAXTEXT:
1856             // the text size limit has been hit -- try to increase it
1857             if ( !AdjustSpaceLimit() )
1858             {
1859                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1860                 InitCommandEvent(event);
1861                 event.SetString(GetValue());
1862                 ProcessCommand(event);
1863             }
1864             break;
1865
1866             // the other edit notification messages are not processed
1867         default:
1868             return false;
1869     }
1870
1871     // processed
1872     return true;
1873 }
1874
1875 WXHBRUSH wxTextCtrl::MSWControlColor(WXHDC hDC)
1876 {
1877     if ( !IsEnabled() && !HasFlag(wxTE_MULTILINE) )
1878         return MSWControlColorDisabled(hDC);
1879
1880     return wxTextCtrlBase::MSWControlColorSolid(hDC);
1881 }
1882
1883 bool wxTextCtrl::AdjustSpaceLimit()
1884 {
1885     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1886
1887     // HACK: we try to automatically extend the limit for the amount of text
1888     //       to allow (interactively) entering more than 64Kb of text under
1889     //       Win9x but we shouldn't reset the text limit which was previously
1890     //       set explicitly with SetMaxLength()
1891     //
1892     //       we could solve this by storing the limit we set in wxTextCtrl but
1893     //       to save space we prefer to simply test here the actual limit
1894     //       value: we consider that SetMaxLength() can only be called for
1895     //       values < 32Kb
1896     if ( limit < 0x8000 )
1897     {
1898         // we've got more text than limit set by SetMaxLength()
1899         return false;
1900     }
1901
1902     unsigned int len = ::GetWindowTextLength(GetHwnd());
1903     if ( len >= limit )
1904     {
1905         limit = len + 0x8000;    // 32Kb
1906
1907 #if wxUSE_RICHEDIT
1908         if ( IsRich() )
1909         {
1910             // as a nice side effect, this also allows passing limit > 64Kb
1911             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1912         }
1913         else
1914 #endif // wxUSE_RICHEDIT
1915         {
1916             if ( limit > 0xffff )
1917             {
1918                 // this will set it to a platform-dependent maximum (much more
1919                 // than 64Kb under NT)
1920                 limit = 0;
1921             }
1922
1923             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1924         }
1925     }
1926
1927     // we changed the limit
1928     return true;
1929 }
1930
1931 bool wxTextCtrl::AcceptsFocus() const
1932 {
1933     // we don't want focus if we can't be edited unless we're a multiline
1934     // control because then it might be still nice to get focus from keyboard
1935     // to be able to scroll it without mouse
1936     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
1937 }
1938
1939 wxSize wxTextCtrl::DoGetBestSize() const
1940 {
1941     int cx, cy;
1942     wxGetCharSize(GetHWND(), &cx, &cy, GetFont());
1943
1944     int wText = DEFAULT_ITEM_WIDTH;
1945
1946     int hText = cy;
1947     if ( m_windowStyle & wxTE_MULTILINE )
1948     {
1949         hText *= wxMax(GetNumberOfLines(), 5);
1950     }
1951     //else: for single line control everything is ok
1952
1953     // we have to add the adjustments for the control height only once, not
1954     // once per line, so do it after multiplication above
1955     hText += EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy) - cy;
1956
1957     return wxSize(wText, hText);
1958 }
1959
1960 // ----------------------------------------------------------------------------
1961 // standard handlers for standard edit menu events
1962 // ----------------------------------------------------------------------------
1963
1964 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1965 {
1966     Cut();
1967 }
1968
1969 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1970 {
1971     Copy();
1972 }
1973
1974 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1975 {
1976     Paste();
1977 }
1978
1979 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1980 {
1981     Undo();
1982 }
1983
1984 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1985 {
1986     Redo();
1987 }
1988
1989 void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
1990 {
1991     long from, to;
1992     GetSelection(& from, & to);
1993     if (from != -1 && to != -1)
1994         Remove(from, to);
1995 }
1996
1997 void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
1998 {
1999     SetSelection(-1, -1);
2000 }
2001
2002 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2003 {
2004     event.Enable( CanCut() );
2005 }
2006
2007 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2008 {
2009     event.Enable( CanCopy() );
2010 }
2011
2012 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2013 {
2014     event.Enable( CanPaste() );
2015 }
2016
2017 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2018 {
2019     event.Enable( CanUndo() );
2020 }
2021
2022 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2023 {
2024     event.Enable( CanRedo() );
2025 }
2026
2027 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
2028 {
2029     long from, to;
2030     GetSelection(& from, & to);
2031     event.Enable(from != -1 && to != -1 && from != to && IsEditable()) ;
2032 }
2033
2034 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2035 {
2036     event.Enable(GetLastPosition() > 0);
2037 }
2038
2039 void wxTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2040 {
2041 #if wxUSE_RICHEDIT
2042     if (IsRich())
2043     {
2044         if (!m_privateContextMenu)
2045         {
2046             m_privateContextMenu = new wxMenu;
2047             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
2048             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
2049             m_privateContextMenu->AppendSeparator();
2050             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
2051             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
2052             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
2053             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
2054             m_privateContextMenu->AppendSeparator();
2055             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
2056         }
2057         PopupMenu(m_privateContextMenu);
2058         return;
2059     }
2060     else
2061 #endif
2062     event.Skip();
2063 }
2064
2065 void wxTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
2066 {
2067     // be sure the caret remains invisible if the user had hidden it
2068     if ( !m_isNativeCaretShown )
2069     {
2070         ::HideCaret(GetHwnd());
2071     }
2072 }
2073
2074 // ----------------------------------------------------------------------------
2075 // Default colors for MSW text control
2076 //
2077 // Set default background color to the native white instead of
2078 // the default wxSYS_COLOUR_BTNFACE (is triggered with wxNullColour).
2079 // ----------------------------------------------------------------------------
2080
2081 wxVisualAttributes wxTextCtrl::GetDefaultAttributes() const
2082 {
2083     wxVisualAttributes attrs;
2084     attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
2085     attrs.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
2086     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW); //white
2087
2088     return attrs;
2089 }
2090
2091 // the rest of the file only deals with the rich edit controls
2092 #if wxUSE_RICHEDIT
2093
2094 // ----------------------------------------------------------------------------
2095 // EN_LINK processing
2096 // ----------------------------------------------------------------------------
2097
2098 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
2099 {
2100     NMHDR *hdr = (NMHDR* )lParam;
2101     switch ( hdr->code )
2102     {
2103        case EN_MSGFILTER:
2104             {
2105                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
2106                 UINT msg = msgf->msg;
2107
2108                 // this is a bit crazy but richedit 1.0 sends us all mouse
2109                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
2110                 // generate the wxWin events for this message manually
2111                 //
2112                 // NB: in fact, this is still not totally correct as it does
2113                 //     send us WM_LBUTTONUP if the selection was cleared by the
2114                 //     last click -- so currently we get 2 events in this case,
2115                 //     but as I don't see any obvious way to check for this I
2116                 //     leave this code in place because it's still better than
2117                 //     not getting left up events at all
2118                 if ( msg == WM_LBUTTONUP )
2119                 {
2120                     WXUINT flags = msgf->wParam;
2121                     int x = GET_X_LPARAM(msgf->lParam),
2122                         y = GET_Y_LPARAM(msgf->lParam);
2123
2124                     HandleMouseEvent(msg, x, y, flags);
2125                 }
2126             }
2127
2128             // return true to process the event (and false to ignore it)
2129             return true;
2130
2131         case EN_LINK:
2132             {
2133                 const ENLINK *enlink = (ENLINK *)hdr;
2134
2135                 switch ( enlink->msg )
2136                 {
2137                     case WM_SETCURSOR:
2138                         // ok, so it is hardcoded - do we really nee to
2139                         // customize it?
2140                         {
2141                             wxCursor cur(wxCURSOR_HAND);
2142                             ::SetCursor(GetHcursorOf(cur));
2143                             *result = TRUE;
2144                             break;
2145                         }
2146
2147                     case WM_MOUSEMOVE:
2148                     case WM_LBUTTONDOWN:
2149                     case WM_LBUTTONUP:
2150                     case WM_LBUTTONDBLCLK:
2151                     case WM_RBUTTONDOWN:
2152                     case WM_RBUTTONUP:
2153                     case WM_RBUTTONDBLCLK:
2154                         // send a mouse event
2155                         {
2156                             static const wxEventType eventsMouse[] =
2157                             {
2158                                 wxEVT_MOTION,
2159                                 wxEVT_LEFT_DOWN,
2160                                 wxEVT_LEFT_UP,
2161                                 wxEVT_LEFT_DCLICK,
2162                                 wxEVT_RIGHT_DOWN,
2163                                 wxEVT_RIGHT_UP,
2164                                 wxEVT_RIGHT_DCLICK,
2165                             };
2166
2167                             // the event ids are consecutive
2168                             wxMouseEvent
2169                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
2170
2171                             InitMouseEvent(evtMouse,
2172                                            GET_X_LPARAM(enlink->lParam),
2173                                            GET_Y_LPARAM(enlink->lParam),
2174                                            enlink->wParam);
2175
2176                             wxTextUrlEvent event(m_windowId, evtMouse,
2177                                                  enlink->chrg.cpMin,
2178                                                  enlink->chrg.cpMax);
2179
2180                             InitCommandEvent(event);
2181
2182                             *result = ProcessCommand(event);
2183                         }
2184                         break;
2185                 }
2186             }
2187             return true;
2188     }
2189
2190     // not processed, leave it to the base class
2191     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
2192 }
2193
2194 // ----------------------------------------------------------------------------
2195 // colour setting for the rich edit controls
2196 // ----------------------------------------------------------------------------
2197
2198 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
2199 {
2200     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
2201     {
2202         // colour didn't really change
2203         return false;
2204     }
2205
2206     if ( IsRich() )
2207     {
2208         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
2209         // EM_SETBKGNDCOLOR additionally
2210         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
2211     }
2212
2213     return true;
2214 }
2215
2216 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
2217 {
2218     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
2219     {
2220         // colour didn't really change
2221         return false;
2222     }
2223
2224     if ( IsRich() )
2225     {
2226         // change the colour of everything
2227         CHARFORMAT cf;
2228         wxZeroMemory(cf);
2229         cf.cbSize = sizeof(cf);
2230         cf.dwMask = CFM_COLOR;
2231         cf.crTextColor = wxColourToRGB(colour);
2232         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
2233     }
2234
2235     return true;
2236 }
2237
2238 // ----------------------------------------------------------------------------
2239 // styling support for rich edit controls
2240 // ----------------------------------------------------------------------------
2241
2242 #if wxUSE_RICHEDIT
2243
2244 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2245 {
2246     if ( !IsRich() )
2247     {
2248         // can't do it with normal text control
2249         return false;
2250     }
2251
2252     // the richedit 1.0 doesn't handle setting background colour, so don't
2253     // even try to do anything if it's the only thing we want to change
2254     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() &&
2255         !style.HasLeftIndent() && !style.HasRightIndent() && !style.HasAlignment() &&
2256         !style.HasTabs() )
2257     {
2258         // nothing to do: return true if there was really nothing to do and
2259         // false if we failed to set bg colour
2260         return !style.HasBackgroundColour();
2261     }
2262
2263     // order the range if needed
2264     if ( start > end )
2265     {
2266         long tmp = start;
2267         start = end;
2268         end = tmp;
2269     }
2270
2271     // we can only change the format of the selection, so select the range we
2272     // want and restore the old selection later
2273     long startOld, endOld;
2274     GetSelection(&startOld, &endOld);
2275
2276     // but do we really have to change the selection?
2277     bool changeSel = start != startOld || end != endOld;
2278
2279     if ( changeSel )
2280     {
2281         DoSetSelection(start, end, false /* don't scroll caret into view */);
2282     }
2283
2284     // initialize CHARFORMAT struct
2285 #if wxUSE_RICHEDIT2
2286     CHARFORMAT2 cf;
2287 #else
2288     CHARFORMAT cf;
2289 #endif
2290
2291     wxZeroMemory(cf);
2292
2293     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2294     // CHARFORMAT in that case
2295 #if wxUSE_RICHEDIT2
2296     if ( m_verRichEdit == 1 )
2297     {
2298         // this is the only thing the control is going to grok
2299         cf.cbSize = sizeof(CHARFORMAT);
2300     }
2301     else
2302 #endif
2303     {
2304         // CHARFORMAT or CHARFORMAT2
2305         cf.cbSize = sizeof(cf);
2306     }
2307
2308     if ( style.HasFont() )
2309     {
2310         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
2311         //     but using it doesn't seem to hurt neither so leaving it for now
2312
2313         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
2314                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
2315
2316         // fill in data from LOGFONT but recalculate lfHeight because we need
2317         // the real height in twips and not the negative number which
2318         // wxFillLogFont() returns (this is correct in general and works with
2319         // the Windows font mapper, but not here)
2320         LOGFONT lf;
2321         wxFillLogFont(&lf, &style.GetFont());
2322         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
2323         cf.bCharSet = lf.lfCharSet;
2324         cf.bPitchAndFamily = lf.lfPitchAndFamily;
2325         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
2326
2327         // also deal with underline/italic/bold attributes: note that we must
2328         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
2329         // style to allow clearing it
2330         if ( lf.lfItalic )
2331         {
2332             cf.dwEffects |= CFE_ITALIC;
2333         }
2334
2335         if ( lf.lfWeight == FW_BOLD )
2336         {
2337             cf.dwEffects |= CFE_BOLD;
2338         }
2339
2340         if ( lf.lfUnderline )
2341         {
2342             cf.dwEffects |= CFE_UNDERLINE;
2343         }
2344
2345         // strikeout fonts are not supported by wxWidgets
2346     }
2347
2348     if ( style.HasTextColour() )
2349     {
2350         cf.dwMask |= CFM_COLOR;
2351         cf.crTextColor = wxColourToRGB(style.GetTextColour());
2352     }
2353
2354 #if wxUSE_RICHEDIT2
2355     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
2356     {
2357         cf.dwMask |= CFM_BACKCOLOR;
2358         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
2359     }
2360 #endif // wxUSE_RICHEDIT2
2361
2362     // do format the selection
2363     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
2364                             SCF_SELECTION, (LPARAM)&cf) != 0;
2365     if ( !ok )
2366     {
2367         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
2368     }
2369
2370     // now do the paragraph formatting
2371     PARAFORMAT2 pf;
2372     wxZeroMemory(pf);
2373     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2374     // PARAFORMAT in that case
2375 #if wxUSE_RICHEDIT2
2376     if ( m_verRichEdit == 1 )
2377     {
2378         // this is the only thing the control is going to grok
2379         pf.cbSize = sizeof(PARAFORMAT);
2380     }
2381     else
2382 #endif
2383     {
2384         // PARAFORMAT or PARAFORMAT2
2385         pf.cbSize = sizeof(pf);
2386     }
2387
2388     if (style.HasAlignment())
2389     {
2390         pf.dwMask |= PFM_ALIGNMENT;
2391         if (style.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
2392             pf.wAlignment = PFA_RIGHT;
2393         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
2394             pf.wAlignment = PFA_CENTER;
2395         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
2396             pf.wAlignment = PFA_JUSTIFY;
2397         else
2398             pf.wAlignment = PFA_LEFT;
2399     }
2400
2401     if (style.HasLeftIndent())
2402     {
2403         pf.dwMask |= PFM_STARTINDENT | PFM_OFFSET;
2404
2405         // Convert from 1/10 mm to TWIPS
2406         pf.dxStartIndent = (int) (((double) style.GetLeftIndent()) * mm2twips / 10.0) ;
2407         pf.dxOffset = (int) (((double) style.GetLeftSubIndent()) * mm2twips / 10.0) ;
2408     }
2409
2410     if (style.HasRightIndent())
2411     {
2412         pf.dwMask |= PFM_RIGHTINDENT;
2413
2414         // Convert from 1/10 mm to TWIPS
2415         pf.dxRightIndent = (int) (((double) style.GetRightIndent()) * mm2twips / 10.0) ;
2416     }
2417
2418     if (style.HasTabs())
2419     {
2420         pf.dwMask |= PFM_TABSTOPS;
2421
2422         const wxArrayInt& tabs = style.GetTabs();
2423
2424         pf.cTabCount = (SHORT)wxMin(tabs.GetCount(), MAX_TAB_STOPS);
2425         size_t i;
2426         for (i = 0; i < (size_t) pf.cTabCount; i++)
2427         {
2428             // Convert from 1/10 mm to TWIPS
2429             pf.rgxTabs[i] = (int) (((double) tabs[i]) * mm2twips / 10.0) ;
2430         }
2431     }
2432
2433     if (pf.dwMask != 0)
2434     {
2435         // do format the selection
2436         bool ok = ::SendMessage(GetHwnd(), EM_SETPARAFORMAT,
2437             0, (LPARAM) &pf) != 0;
2438         if ( !ok )
2439         {
2440             wxLogDebug(_T("SendMessage(EM_SETPARAFORMAT, 0) failed"));
2441         }
2442     }
2443
2444     if ( changeSel )
2445     {
2446         // restore the original selection
2447         DoSetSelection(startOld, endOld, false);
2448     }
2449
2450     return ok;
2451 }
2452
2453 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2454 {
2455     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2456         return false;
2457
2458     if ( IsEditable() )
2459     {
2460         // we have to do this or the style wouldn't apply for the text typed by
2461         // the user
2462         wxTextPos posLast = GetLastPosition();
2463         SetStyle(posLast, posLast, m_defaultStyle);
2464     }
2465
2466     return true;
2467 }
2468
2469 bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
2470 {
2471     if ( !IsRich() )
2472     {
2473         // can't do it with normal text control
2474         return false;
2475     }
2476
2477     // initialize CHARFORMAT struct
2478 #if wxUSE_RICHEDIT2
2479     CHARFORMAT2 cf;
2480 #else
2481     CHARFORMAT cf;
2482 #endif
2483
2484     wxZeroMemory(cf);
2485
2486     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2487     // CHARFORMAT in that case
2488 #if wxUSE_RICHEDIT2
2489     if ( m_verRichEdit == 1 )
2490     {
2491         // this is the only thing the control is going to grok
2492         cf.cbSize = sizeof(CHARFORMAT);
2493     }
2494     else
2495 #endif
2496     {
2497         // CHARFORMAT or CHARFORMAT2
2498         cf.cbSize = sizeof(cf);
2499     }
2500     // we can only change the format of the selection, so select the range we
2501     // want and restore the old selection later
2502     long startOld, endOld;
2503     GetSelection(&startOld, &endOld);
2504
2505     // but do we really have to change the selection?
2506     bool changeSel = position != startOld || position != endOld;
2507
2508     if ( changeSel )
2509     {
2510         DoSetSelection(position, position, false /* don't scroll caret into view */);
2511     }
2512
2513     // get the selection formatting
2514     (void) ::SendMessage(GetHwnd(), EM_GETCHARFORMAT,
2515                             SCF_SELECTION, (LPARAM)&cf) ;
2516
2517
2518     LOGFONT lf;
2519     lf.lfHeight = cf.yHeight;
2520     lf.lfWidth = 0;
2521     lf.lfCharSet = ANSI_CHARSET; // FIXME: how to get correct charset?
2522     lf.lfClipPrecision = 0;
2523     lf.lfEscapement = 0;
2524     wxStrcpy(lf.lfFaceName, cf.szFaceName);
2525
2526     //NOTE:  we _MUST_ set each of these values to _something_ since we
2527     //do not call wxZeroMemory on the LOGFONT lf
2528     if (cf.dwEffects & CFE_ITALIC)
2529         lf.lfItalic = TRUE;
2530     else
2531         lf.lfItalic = FALSE;
2532
2533     lf.lfOrientation = 0;
2534     lf.lfPitchAndFamily = cf.bPitchAndFamily;
2535     lf.lfQuality = 0;
2536
2537     if (cf.dwEffects & CFE_STRIKEOUT)
2538         lf.lfStrikeOut = TRUE;
2539     else
2540         lf.lfStrikeOut = FALSE;
2541
2542     if (cf.dwEffects & CFE_UNDERLINE)
2543         lf.lfUnderline = TRUE;
2544     else
2545         lf.lfUnderline = FALSE;
2546
2547     if (cf.dwEffects & CFE_BOLD)
2548         lf.lfWeight = FW_BOLD;
2549     else
2550         lf.lfWeight = FW_NORMAL;
2551
2552     wxFont font = wxCreateFontFromLogFont(& lf);
2553     if (font.Ok())
2554     {
2555         style.SetFont(font);
2556     }
2557     style.SetTextColour(wxColour(cf.crTextColor));
2558
2559 #if wxUSE_RICHEDIT2
2560     if ( m_verRichEdit != 1 )
2561     {
2562         // cf.dwMask |= CFM_BACKCOLOR;
2563         style.SetBackgroundColour(wxColour(cf.crBackColor));
2564     }
2565 #endif // wxUSE_RICHEDIT2
2566
2567     // now get the paragraph formatting
2568     PARAFORMAT2 pf;
2569     wxZeroMemory(pf);
2570     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2571     // PARAFORMAT in that case
2572 #if wxUSE_RICHEDIT2
2573     if ( m_verRichEdit == 1 )
2574     {
2575         // this is the only thing the control is going to grok
2576         pf.cbSize = sizeof(PARAFORMAT);
2577     }
2578     else
2579 #endif
2580     {
2581         // PARAFORMAT or PARAFORMAT2
2582         pf.cbSize = sizeof(pf);
2583     }
2584
2585     // do format the selection
2586     (void) ::SendMessage(GetHwnd(), EM_GETPARAFORMAT, 0, (LPARAM) &pf) ;
2587
2588     style.SetLeftIndent( (int) ((double) pf.dxStartIndent * twips2mm * 10.0), (int) ((double) pf.dxOffset * twips2mm * 10.0) );
2589     style.SetRightIndent( (int) ((double) pf.dxRightIndent * twips2mm * 10.0) );
2590
2591     if (pf.wAlignment == PFA_CENTER)
2592         style.SetAlignment(wxTEXT_ALIGNMENT_CENTRE);
2593     else if (pf.wAlignment == PFA_RIGHT)
2594         style.SetAlignment(wxTEXT_ALIGNMENT_RIGHT);
2595     else if (pf.wAlignment == PFA_JUSTIFY)
2596         style.SetAlignment(wxTEXT_ALIGNMENT_JUSTIFIED);
2597     else
2598         style.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
2599
2600     wxArrayInt tabStops;
2601     size_t i;
2602     for (i = 0; i < (size_t) pf.cTabCount; i++)
2603     {
2604         tabStops.Add( (int) ((double) (pf.rgxTabs[i] & 0xFFFF) * twips2mm * 10.0) );
2605     }
2606
2607     if ( changeSel )
2608     {
2609         // restore the original selection
2610         DoSetSelection(startOld, endOld, false);
2611     }
2612
2613     return true;
2614 }
2615
2616 #endif
2617
2618 // ----------------------------------------------------------------------------
2619 // wxRichEditModule
2620 // ----------------------------------------------------------------------------
2621
2622 bool wxRichEditModule::OnInit()
2623 {
2624     // don't do anything - we will load it when needed
2625     return true;
2626 }
2627
2628 void wxRichEditModule::OnExit()
2629 {
2630     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2631     {
2632         if ( ms_hRichEdit[i] )
2633         {
2634             ::FreeLibrary(ms_hRichEdit[i]);
2635             ms_hRichEdit[i] = NULL;
2636         }
2637     }
2638 }
2639
2640 /* static */
2641 bool wxRichEditModule::Load(int version)
2642 {
2643     // we don't support loading richedit 3.0 as I don't know how to distinguish
2644     // it from 2.0 anyhow
2645     wxCHECK_MSG( version == 1 || version == 2, false,
2646                  _T("incorrect richedit control version requested") );
2647
2648     // make it the index in the array
2649     version--;
2650
2651     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
2652     {
2653         // we had already tried to load it and failed
2654         return false;
2655     }
2656
2657     if ( ms_hRichEdit[version] )
2658     {
2659         // we've already got this one
2660         return true;
2661     }
2662
2663     wxString dllname = version ? _T("riched20") : _T("riched32");
2664     dllname += _T(".dll");
2665
2666     ms_hRichEdit[version] = ::LoadLibrary(dllname);
2667
2668     if ( !ms_hRichEdit[version] )
2669     {
2670         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
2671
2672         ms_hRichEdit[version] = (HINSTANCE)-1;
2673
2674         return false;
2675     }
2676
2677     return true;
2678 }
2679
2680 #endif // wxUSE_RICHEDIT
2681
2682 #endif // wxUSE_TEXTCTRL && !(__SMARTPHONE__ && __WXWINCE__)