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 #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 #include "wx/msw/winundef.h"
  56
  57 #include <string.h>
  58 #include <stdlib.h>
  59
  60 #ifndef __WXWINCE__
  61 #include <sys/types.h>
  62 #endif
  63
  64 #if wxUSE_RICHEDIT
  65
  66 // old mingw32 has richedit stuff directly in windows.h and doesn't have
  67 // richedit.h at all
  68 #if !defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__)
  69     #include <richedit.h>
  70 #endif
  71
  72 #include "wx/msw/missing.h"
  73
  74 #endif // wxUSE_RICHEDIT
  75
  76 // ----------------------------------------------------------------------------
  77 // private classes
  78 // ----------------------------------------------------------------------------
  79
  80 #if wxUSE_RICHEDIT
  81
  82 // this module initializes RichEdit DLL(s) if needed
  83 class wxRichEditModule : public wxModule
  84 {
  85 public:
  86     virtual bool OnInit();
  87     virtual void OnExit();
  88
  89     // load the richedit DLL of at least of required version
  90     static bool Load(int version = 1);
  91
  92 private:
  93     // the handles to richedit 1.0 and 2.0 (or 3.0) DLLs
  94     static HINSTANCE ms_hRichEdit[2];
  95
  96     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
  97 };
  98
  99 HINSTANCE wxRichEditModule::ms_hRichEdit[2] = { NULL, NULL };
 100
 101 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 102
 103 #endif // wxUSE_RICHEDIT
 104
 105 // a small class used to set m_updatesCount to 0 (to filter duplicate events if
 106 // necessary) and to reset it back to -1 afterwards
 107 class UpdatesCountFilter
 108 {
 109 public:
 110     UpdatesCountFilter(int& count)
 111         : m_count(count)
 112     {
 113         wxASSERT_MSG( m_count == -1, _T("wrong initial m_updatesCount value") );
 114
 115         m_count = 0;
 116     }
 117
 118     ~UpdatesCountFilter()
 119     {
 120         m_count = -1;
 121     }
 122
 123     // return true if an event has been received
 124     bool GotUpdate() const
 125     {
 126         return m_count == 1;
 127     }
 128
 129 private:
 130     int& m_count;
 131
 132     DECLARE_NO_COPY_CLASS(UpdatesCountFilter)
 133 };
 134
 135 // ----------------------------------------------------------------------------
 136 // event tables and other macros
 137 // ----------------------------------------------------------------------------
 138
 139 #if wxUSE_EXTENDED_RTTI
 140 WX_DEFINE_FLAGS( wxTextCtrlStyle )
 141
 142 wxBEGIN_FLAGS( wxTextCtrlStyle )
 143     // new style border flags, we put them first to
 144     // use them for streaming out
 145     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
 146     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
 147     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
 148     wxFLAGS_MEMBER(wxBORDER_RAISED)
 149     wxFLAGS_MEMBER(wxBORDER_STATIC)
 150     wxFLAGS_MEMBER(wxBORDER_NONE)
 151
 152     // old style border flags
 153     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
 154     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
 155     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
 156     wxFLAGS_MEMBER(wxRAISED_BORDER)
 157     wxFLAGS_MEMBER(wxSTATIC_BORDER)
 158     wxFLAGS_MEMBER(wxBORDER)
 159
 160     // standard window styles
 161     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
 162     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
 163     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
 164     wxFLAGS_MEMBER(wxWANTS_CHARS)
 165     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
 166     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
 167     wxFLAGS_MEMBER(wxVSCROLL)
 168     wxFLAGS_MEMBER(wxHSCROLL)
 169
 170     wxFLAGS_MEMBER(wxTE_PROCESS_ENTER)
 171     wxFLAGS_MEMBER(wxTE_PROCESS_TAB)
 172     wxFLAGS_MEMBER(wxTE_MULTILINE)
 173     wxFLAGS_MEMBER(wxTE_PASSWORD)
 174     wxFLAGS_MEMBER(wxTE_READONLY)
 175     wxFLAGS_MEMBER(wxHSCROLL)
 176     wxFLAGS_MEMBER(wxTE_RICH)
 177     wxFLAGS_MEMBER(wxTE_RICH2)
 178     wxFLAGS_MEMBER(wxTE_AUTO_URL)
 179     wxFLAGS_MEMBER(wxTE_NOHIDESEL)
 180     wxFLAGS_MEMBER(wxTE_LEFT)
 181     wxFLAGS_MEMBER(wxTE_CENTRE)
 182     wxFLAGS_MEMBER(wxTE_RIGHT)
 183     wxFLAGS_MEMBER(wxTE_DONTWRAP)
 184     wxFLAGS_MEMBER(wxTE_LINEWRAP)
 185     wxFLAGS_MEMBER(wxTE_WORDWRAP)
 186
 187 wxEND_FLAGS( wxTextCtrlStyle )
 188
 189 IMPLEMENT_DYNAMIC_CLASS_XTI(wxTextCtrl, wxControl,"wx/textctrl.h")
 190
 191 wxBEGIN_PROPERTIES_TABLE(wxTextCtrl)
 192     wxEVENT_PROPERTY( TextUpdated , wxEVT_COMMAND_TEXT_UPDATED , wxCommandEvent )
 193     wxEVENT_PROPERTY( TextEnter , wxEVT_COMMAND_TEXT_ENTER , wxCommandEvent )
 194
 195     wxPROPERTY( Font , wxFont , SetFont , GetFont  , EMPTY_MACROVALUE, 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
 196     wxPROPERTY( Value , wxString , SetValue, GetValue, wxString() , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 197     wxPROPERTY_FLAGS( WindowStyle , wxTextCtrlStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
 198 wxEND_PROPERTIES_TABLE()
 199
 200 wxBEGIN_HANDLERS_TABLE(wxTextCtrl)
 201 wxEND_HANDLERS_TABLE()
 202
 203 wxCONSTRUCTOR_6( wxTextCtrl , wxWindow* , Parent , wxWindowID , Id , wxString , Value , wxPoint , Position , wxSize , Size , long , WindowStyle)
 204 #else
 205 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 206 #endif
 207
 208
 209 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 210     EVT_CHAR(wxTextCtrl::OnChar)
 211     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 212
 213 #if wxUSE_RICHEDIT
 214     EVT_RIGHT_UP(wxTextCtrl::OnRightClick)
 215 #endif
 216
 217     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 218     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 219     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 220     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 221     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 222     EVT_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
 223     EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)
 224
 225     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 226     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 227     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 228     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 229     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 230     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
 231     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
 232
 233     EVT_SET_FOCUS(wxTextCtrl::OnSetFocus)
 234 END_EVENT_TABLE()
 235
 236 // ============================================================================
 237 // implementation
 238 // ============================================================================
 239
 240 // ----------------------------------------------------------------------------
 241 // creation
 242 // ----------------------------------------------------------------------------
 243
 244 void wxTextCtrl::Init()
 245 {
 246 #if wxUSE_RICHEDIT
 247     m_verRichEdit = 0;
 248 #endif // wxUSE_RICHEDIT
 249
 250     m_privateContextMenu = NULL;
 251     m_updatesCount = -1;
 252     m_isNativeCaretShown = true;
 253     m_isCaretAtEnd = 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 wxUSE_RICHEDIT
 285     if ( m_windowStyle & wxTE_AUTO_URL )
 286     {
 287         // automatic URL detection only works in RichEdit 2.0+
 288         m_windowStyle |= wxTE_RICH2;
 289     }
 290
 291     if ( m_windowStyle & wxTE_RICH2 )
 292     {
 293         // using richedit 2.0 implies using wxTE_RICH
 294         m_windowStyle |= wxTE_RICH;
 295     }
 296
 297     // we need to load the richedit DLL before creating the rich edit control
 298     if ( m_windowStyle & wxTE_RICH )
 299     {
 300         static bool s_errorGiven = false;// MT-FIXME
 301
 302         // Which version do we need? Use 1.0 by default because it is much more
 303         // like the the standard EDIT or 2.0 if explicitly requested, but use
 304         // only 2.0 in Unicode mode as 1.0 doesn't support Unicode at all
 305         //
 306         // TODO: RichEdit 3.0 is apparently capable of emulating RichEdit 1.0
 307         //       (and thus EDIT) much better than RichEdit 2.0 so we probably
 308         //       should use 3.0 if available as it is the best of both worlds -
 309         //       but as I can't test it right now I don't do it (VZ)
 310 #if wxUSE_UNICODE
 311         const int verRichEdit = 2;
 312 #else // !wxUSE_UNICODE
 313         int verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 314 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 315
 316         // only give the error msg once if the DLL can't be loaded
 317         if ( !s_errorGiven )
 318         {
 319             // try to load the RichEdit DLL (will do nothing if already done)
 320             if ( !wxRichEditModule::Load(verRichEdit) )
 321             {
 322 #if !wxUSE_UNICODE
 323                 // try another version?
 324                 verRichEdit = 3 - verRichEdit; // 1 <-> 2
 325
 326                 if ( !wxRichEditModule::Load(verRichEdit) )
 327 #endif // wxUSE_UNICODE
 328                 {
 329                     wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 330
 331                     s_errorGiven = true;
 332                 }
 333             }
 334         }
 335
 336         // have we managed to load any richedit version?
 337         if ( !s_errorGiven )
 338         {
 339             m_verRichEdit = verRichEdit;
 340             if ( m_verRichEdit == 1 )
 341             {
 342                 windowClass = wxT("RICHEDIT");
 343             }
 344             else
 345             {
 346 #ifndef RICHEDIT_CLASS
 347                 wxString RICHEDIT_CLASS;
 348                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 349 #if wxUSE_UNICODE
 350                 RICHEDIT_CLASS += _T('W');
 351 #else // ANSI
 352                 RICHEDIT_CLASS += _T('A');
 353 #endif // Unicode/ANSI
 354 #endif // !RICHEDIT_CLASS
 355
 356                 windowClass = RICHEDIT_CLASS;
 357             }
 358         }
 359     }
 360 #endif // wxUSE_RICHEDIT
 361
 362     // we need to turn '\n's into "\r\n"s for the multiline controls
 363     wxString valueWin;
 364     if ( m_windowStyle & wxTE_MULTILINE )
 365     {
 366         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 367     }
 368     else // single line
 369     {
 370         valueWin = value;
 371     }
 372
 373     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 374         return false;
 375
 376 #if wxUSE_RICHEDIT
 377     if ( IsRich() )
 378     {
 379         // enable the events we're interested in: we want to get EN_CHANGE as
 380         // for the normal controls
 381         LPARAM mask = ENM_CHANGE;
 382
 383         if ( GetRichVersion() == 1 )
 384         {
 385             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 386             // explained in its handler
 387            mask |= ENM_MOUSEEVENTS;
 388         }
 389         else if ( m_windowStyle & wxTE_AUTO_URL )
 390         {
 391             mask |= ENM_LINK;
 392
 393             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 394         }
 395
 396         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 397     }
 398 #endif // wxUSE_RICHEDIT
 399
 400     return true;
 401 }
 402
 403 // Make sure the window style (etc.) reflects the HWND style (roughly)
 404 void wxTextCtrl::AdoptAttributesFromHWND()
 405 {
 406     wxWindow::AdoptAttributesFromHWND();
 407
 408     HWND hWnd = GetHwnd();
 409     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 410
 411     // retrieve the style to see whether this is an edit or richedit ctrl
 412 #if wxUSE_RICHEDIT
 413     wxString classname = wxGetWindowClass(GetHWND());
 414
 415     if ( classname.IsSameAs(_T("EDIT"), false /* no case */) )
 416     {
 417         m_verRichEdit = 0;
 418     }
 419     else // rich edit?
 420     {
 421         wxChar c;
 422         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 423         {
 424             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 425
 426             m_verRichEdit = 0;
 427         }
 428     }
 429 #endif // wxUSE_RICHEDIT
 430
 431     if (style & ES_MULTILINE)
 432         m_windowStyle |= wxTE_MULTILINE;
 433     if (style & ES_PASSWORD)
 434         m_windowStyle |= wxTE_PASSWORD;
 435     if (style & ES_READONLY)
 436         m_windowStyle |= wxTE_READONLY;
 437     if (style & ES_WANTRETURN)
 438         m_windowStyle |= wxTE_PROCESS_ENTER;
 439     if (style & ES_CENTER)
 440         m_windowStyle |= wxTE_CENTRE;
 441     if (style & ES_RIGHT)
 442         m_windowStyle |= wxTE_RIGHT;
 443 }
 444
 445 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 446 {
 447     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 448
 449     // styles which we alaways add by default
 450     if ( style & wxTE_MULTILINE )
 451     {
 452         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 453                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 454
 455         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 456         if ( !(style & wxTE_NO_VSCROLL) )
 457         {
 458             // always adjust the vertical scrollbar automatically if we have it
 459             msStyle |= WS_VSCROLL | ES_AUTOVSCROLL;
 460
 461 #if wxUSE_RICHEDIT
 462             // we have to use this style for the rich edit controls because
 463             // without it the vertical scrollbar never appears at all in
 464             // richedit 3.0 because of our ECO_NOHIDESEL hack (search for it)
 465             if ( style & wxTE_RICH2 )
 466             {
 467                 msStyle |= ES_DISABLENOSCROLL;
 468             }
 469 #endif // wxUSE_RICHEDIT
 470         }
 471
 472         style |= wxTE_PROCESS_ENTER;
 473     }
 474     else // !multiline
 475     {
 476         // there is really no reason to not have this style for single line
 477         // text controls
 478         msStyle |= ES_AUTOHSCROLL;
 479     }
 480
 481     // note that wxTE_DONTWRAP is the same as wxHSCROLL so if we have a horz
 482     // scrollbar, there is no wrapping -- which makes sense
 483     if ( style & wxTE_DONTWRAP )
 484     {
 485         // automatically scroll the control horizontally as necessary
 486         //
 487         // NB: ES_AUTOHSCROLL is needed for richedit controls or they don't
 488         //     show horz scrollbar at all, even in spite of WS_HSCROLL, and as
 489         //     it doesn't seem to do any harm for plain edit controls, add it
 490         //     always
 491         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 492     }
 493
 494     if ( style & wxTE_READONLY )
 495         msStyle |= ES_READONLY;
 496
 497     if ( style & wxTE_PASSWORD )
 498         msStyle |= ES_PASSWORD;
 499
 500     if ( style & wxTE_NOHIDESEL )
 501         msStyle |= ES_NOHIDESEL;
 502
 503     // note that we can't do do "& wxTE_LEFT" as wxTE_LEFT == 0
 504     if ( style & wxTE_CENTRE )
 505         msStyle |= ES_CENTER;
 506     else if ( style & wxTE_RIGHT )
 507         msStyle |= ES_RIGHT;
 508     else
 509         msStyle |= ES_LEFT; // ES_LEFT is 0 as well but for consistency...
 510
 511     return msStyle;
 512 }
 513
 514 void wxTextCtrl::SetWindowStyleFlag(long style)
 515 {
 516 #if wxUSE_RICHEDIT
 517     // we have to deal with some styles separately because they can't be
 518     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 519     // using richedit-specific EM_SETOPTIONS
 520     if ( IsRich() &&
 521             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 522     {
 523         bool set = (style & wxTE_NOHIDESEL) != 0;
 524
 525         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 526                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 527     }
 528 #endif // wxUSE_RICHEDIT
 529
 530     wxControl::SetWindowStyleFlag(style);
 531 }
 532
 533 // ----------------------------------------------------------------------------
 534 // set/get the controls text
 535 // ----------------------------------------------------------------------------
 536
 537 wxString wxTextCtrl::GetValue() const
 538 {
 539     // range 0..-1 is special for GetRange() and means to retrieve all text
 540     return GetRange(0, -1);
 541 }
 542
 543 wxString wxTextCtrl::GetRange(long from, long to) const
 544 {
 545     wxString str;
 546
 547     if ( from >= to && to != -1 )
 548     {
 549         // nothing to retrieve
 550         return str;
 551     }
 552
 553 #if wxUSE_RICHEDIT
 554     if ( IsRich() )
 555     {
 556         int len = GetWindowTextLength(GetHwnd());
 557         if ( len > from )
 558         {
 559             if ( to == -1 )
 560                 to = len;
 561
 562 #if !wxUSE_UNICODE
 563             // we must use EM_STREAMOUT if we don't want to lose all characters
 564             // not representable in the current character set (EM_GETTEXTRANGE
 565             // simply replaces them with question marks...)
 566             if ( GetRichVersion() > 1 )
 567             {
 568                 // we must have some encoding, otherwise any 8bit chars in the
 569                 // control are simply *lost* (replaced by '?')
 570                 wxFontEncoding encoding = wxFONTENCODING_SYSTEM;
 571
 572                 wxFont font = m_defaultStyle.GetFont();
 573                 if ( !font.Ok() )
 574                     font = GetFont();
 575
 576                 if ( font.Ok() )
 577                 {
 578                    encoding = font.GetEncoding();
 579                 }
 580
 581                 if ( encoding == wxFONTENCODING_SYSTEM )
 582                 {
 583                     encoding = wxLocale::GetSystemEncoding();
 584                 }
 585
 586                 if ( encoding == wxFONTENCODING_SYSTEM )
 587                 {
 588                     encoding = wxFONTENCODING_ISO8859_1;
 589                 }
 590
 591                 str = StreamOut(encoding);
 592
 593                 if ( !str.empty() )
 594                 {
 595                     // we have to manually extract the required part, luckily
 596                     // this is easy in this case as EOL characters in str are
 597                     // just LFs because we remove CRs in wxRichEditStreamOut
 598                     str = str.Mid(from, to - from);
 599                 }
 600             }
 601
 602             // StreamOut() wasn't used or failed, try to do it in normal way
 603             if ( str.empty() )
 604 #endif // !wxUSE_UNICODE
 605             {
 606                 // alloc one extra WORD as needed by the control
 607                 wxStringBuffer tmp(str, ++len);
 608                 wxChar *p = tmp;
 609
 610                 TEXTRANGE textRange;
 611                 textRange.chrg.cpMin = from;
 612                 textRange.chrg.cpMax = to;
 613                 textRange.lpstrText = p;
 614
 615                 (void)::SendMessage(GetHwnd(), EM_GETTEXTRANGE,
 616                                     0, (LPARAM)&textRange);
 617
 618                 if ( m_verRichEdit > 1 )
 619                 {
 620                     // RichEdit 2.0 uses just CR ('\r') for the
 621                     // newlines which is neither Unix nor Windows
 622                     // style - convert it to something reasonable
 623                     for ( ; *p; p++ )
 624                     {
 625                         if ( *p == _T('\r') )
 626                             *p = _T('\n');
 627                     }
 628                 }
 629             }
 630
 631             if ( m_verRichEdit == 1 )
 632             {
 633                 // convert to the canonical form - see comment below
 634                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 635             }
 636         }
 637         //else: no text at all, leave the string empty
 638     }
 639     else
 640 #endif // wxUSE_RICHEDIT
 641     {
 642         // retrieve all text
 643         str = wxGetWindowText(GetHWND());
 644
 645         // need only a range?
 646         if ( from < to )
 647         {
 648             str = str.Mid(from, to - from);
 649         }
 650
 651         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 652         // canonical one (same one as above) for consistency with the other kinds
 653         // of controls and, more importantly, with the other ports
 654         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 655     }
 656
 657     return str;
 658 }
 659
 660 void wxTextCtrl::SetValue(const wxString& value)
 661 {
 662     // if the text is long enough, it's faster to just set it instead of first
 663     // comparing it with the old one (chances are that it will be different
 664     // anyhow, this comparison is there to avoid flicker for small single-line
 665     // edit controls mostly)
 666     if ( (value.length() > 0x400) || (value != GetValue()) )
 667     {
 668         DoWriteText(value, false /* not selection only */);
 669
 670         // for compatibility, don't move the cursor when doing SetValue()
 671         SetInsertionPoint(0);
 672     }
 673     else // same text
 674     {
 675         // still send an event for consistency
 676         SendUpdateEvent();
 677     }
 678
 679     // we should reset the modified flag even if the value didn't really change
 680
 681     // mark the control as being not dirty - we changed its text, not the
 682     // user
 683     DiscardEdits();
 684 }
 685
 686 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 687
 688 // TODO: using memcpy() would improve performance a lot for big amounts of text
 689
 690 DWORD CALLBACK
 691 wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 692 {
 693     *pcb = 0;
 694
 695     const wchar_t ** const ppws = (const wchar_t **)dwCookie;
 696
 697     wchar_t *wbuf = (wchar_t *)buf;
 698     const wchar_t *wpc = *ppws;
 699     while ( cb && *wpc )
 700     {
 701         *wbuf++ = *wpc++;
 702
 703         cb -= sizeof(wchar_t);
 704         (*pcb) += sizeof(wchar_t);
 705     }
 706
 707     *ppws = wpc;
 708
 709     return 0;
 710 }
 711
 712 // helper struct used to pass parameters from wxTextCtrl to wxRichEditStreamOut
 713 struct wxStreamOutData
 714 {
 715     wchar_t *wpc;
 716     size_t len;
 717 };
 718
 719 DWORD CALLBACK
 720 wxRichEditStreamOut(DWORD_PTR dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 721 {
 722     *pcb = 0;
 723
 724     wxStreamOutData *data = (wxStreamOutData *)dwCookie;
 725
 726     const wchar_t *wbuf = (const wchar_t *)buf;
 727     wchar_t *wpc = data->wpc;
 728     while ( cb )
 729     {
 730         wchar_t wch = *wbuf++;
 731
 732         // turn "\r\n" into "\n" on the fly
 733         if ( wch != L'\r' )
 734             *wpc++ = wch;
 735         else
 736             data->len--;
 737
 738         cb -= sizeof(wchar_t);
 739         (*pcb) += sizeof(wchar_t);
 740     }
 741
 742     data->wpc = wpc;
 743
 744     return 0;
 745 }
 746
 747
 748 #if wxUSE_UNICODE_MSLU
 749     #define UNUSED_IF_MSLU(param)
 750 #else
 751     #define UNUSED_IF_MSLU(param) param
 752 #endif
 753
 754 bool
 755 wxTextCtrl::StreamIn(const wxString& value,
 756                      wxFontEncoding UNUSED_IF_MSLU(encoding),
 757                      bool selectionOnly)
 758 {
 759 #if wxUSE_UNICODE_MSLU
 760     const wchar_t *wpc = value.c_str();
 761 #else // !wxUSE_UNICODE_MSLU
 762     wxCSConv conv(encoding);
 763
 764     const size_t len = conv.MB2WC(NULL, value, value.length());
 765
 766 #if wxUSE_WCHAR_T
 767     wxWCharBuffer wchBuf(len);
 768     wchar_t *wpc = wchBuf.data();
 769 #else
 770     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 771     wchar_t *wpc = wchBuf;
 772 #endif
 773
 774     conv.MB2WC(wpc, value, value.length());
 775 #endif // wxUSE_UNICODE_MSLU
 776
 777     // finally, stream it in the control
 778     EDITSTREAM eds;
 779     wxZeroMemory(eds);
 780     eds.dwCookie = (DWORD)&wpc;
 781     // the cast below is needed for broken (very) old mingw32 headers
 782     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 783
 784     // same problem as in DoWriteText(): we can get multiple events here
 785     UpdatesCountFilter ucf(m_updatesCount);
 786
 787     ::SendMessage(GetHwnd(), EM_STREAMIN,
 788                   SF_TEXT |
 789                   SF_UNICODE |
 790                   (selectionOnly ? SFF_SELECTION : 0),
 791                   (LPARAM)&eds);
 792
 793     wxASSERT_MSG( ucf.GotUpdate(), _T("EM_STREAMIN didn't send EN_UPDATE?") );
 794
 795     if ( eds.dwError )
 796     {
 797         wxLogLastError(_T("EM_STREAMIN"));
 798     }
 799
 800 #if !wxUSE_WCHAR_T
 801     free(wchBuf);
 802 #endif // !wxUSE_WCHAR_T
 803
 804     return true;
 805 }
 806
 807 #if !wxUSE_UNICODE_MSLU
 808
 809 wxString
 810 wxTextCtrl::StreamOut(wxFontEncoding encoding, bool selectionOnly) const
 811 {
 812     wxString out;
 813
 814     const int len = GetWindowTextLength(GetHwnd());
 815
 816 #if wxUSE_WCHAR_T
 817     wxWCharBuffer wchBuf(len);
 818     wchar_t *wpc = wchBuf.data();
 819 #else
 820     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 821     wchar_t *wpc = wchBuf;
 822 #endif
 823
 824     wxStreamOutData data;
 825     data.wpc = wpc;
 826     data.len = len;
 827
 828     EDITSTREAM eds;
 829     wxZeroMemory(eds);
 830     eds.dwCookie = (DWORD)&data;
 831     eds.pfnCallback = wxRichEditStreamOut;
 832
 833     ::SendMessage
 834       (
 835         GetHwnd(),
 836         EM_STREAMOUT,
 837         SF_TEXT | SF_UNICODE | (selectionOnly ? SFF_SELECTION : 0),
 838         (LPARAM)&eds
 839       );
 840
 841     if ( eds.dwError )
 842     {
 843         wxLogLastError(_T("EM_STREAMOUT"));
 844     }
 845     else // streamed out ok
 846     {
 847         // NUL-terminate the string because its length could have been
 848         // decreased by wxRichEditStreamOut
 849         *(wchBuf.data() + data.len) = L'\0';
 850
 851         // now convert to the given encoding (this is a possibly lossful
 852         // conversion but what else can we do)
 853         wxCSConv conv(encoding);
 854         size_t lenNeeded = conv.WC2MB(NULL, wchBuf, 0);
 855         if ( lenNeeded++ )
 856         {
 857             conv.WC2MB(wxStringBuffer(out, lenNeeded), wchBuf, lenNeeded);
 858         }
 859     }
 860
 861 #if !wxUSE_WCHAR_T
 862     free(wchBuf);
 863 #endif // !wxUSE_WCHAR_T
 864
 865     return out;
 866 }
 867
 868 #endif // !wxUSE_UNICODE_MSLU
 869
 870 #endif // wxUSE_RICHEDIT
 871
 872 void wxTextCtrl::WriteText(const wxString& value)
 873 {
 874     DoWriteText(value);
 875 }
 876
 877 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 878 {
 879     wxString valueDos;
 880     if ( m_windowStyle & wxTE_MULTILINE )
 881         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 882     else
 883         valueDos = value;
 884
 885 #if wxUSE_RICHEDIT
 886     // there are several complications with the rich edit controls here
 887     bool done = false;
 888     if ( IsRich() )
 889     {
 890         // first, ensure that the new text will be in the default style
 891         if ( !m_defaultStyle.IsDefault() )
 892         {
 893             long start, end;
 894             GetSelection(&start, &end);
 895             SetStyle(start, end, m_defaultStyle);
 896         }
 897
 898 #if wxUSE_UNICODE_MSLU
 899         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 900         // but EM_STREAMIN works
 901         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 902         {
 903            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 904         }
 905 #endif // wxUSE_UNICODE_MSLU
 906
 907 #if !wxUSE_UNICODE
 908         // next check if the text we're inserting must be shown in a non
 909         // default charset -- this only works for RichEdit > 1.0
 910         if ( GetRichVersion() > 1 )
 911         {
 912             wxFont font = m_defaultStyle.GetFont();
 913             if ( !font.Ok() )
 914                 font = GetFont();
 915
 916             if ( font.Ok() )
 917             {
 918                wxFontEncoding encoding = font.GetEncoding();
 919                if ( encoding != wxFONTENCODING_SYSTEM )
 920                {
 921                    // we have to use EM_STREAMIN to force richedit control 2.0+
 922                    // to show any text in the non default charset -- otherwise
 923                    // it thinks it knows better than we do and always shows it
 924                    // in the default one
 925                    done = StreamIn(valueDos, encoding, selectionOnly);
 926                }
 927             }
 928         }
 929 #endif // !wxUSE_UNICODE
 930     }
 931
 932     if ( !done )
 933 #endif // wxUSE_RICHEDIT
 934     {
 935         // in some cases we get 2 EN_CHANGE notifications after the SendMessage
 936         // call (this happens for plain EDITs with EM_REPLACESEL and under some
 937         // -- undetermined -- conditions with rich edit) and sometimes we don't
 938         // get any events at all (plain EDIT with WM_SETTEXT), so ensure that
 939         // we generate exactly one of them by ignoring all but the first one in
 940         // SendUpdateEvent() and generating one ourselves if we hadn't got any
 941         // notifications from Windows
 942         UpdatesCountFilter ucf(m_updatesCount);
 943
 944         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
 945                       0, (LPARAM)valueDos.c_str());
 946
 947         if ( !ucf.GotUpdate() )
 948         {
 949             SendUpdateEvent();
 950         }
 951     }
 952 }
 953
 954 void wxTextCtrl::AppendText(const wxString& text)
 955 {
 956     SetInsertionPointEnd();
 957
 958     WriteText(text);
 959
 960 #if wxUSE_RICHEDIT
 961     // don't do this if we're frozen, saves some time
 962     if ( !IsFrozen() && IsMultiLine() && GetRichVersion() > 1 )
 963     {
 964         // setting the caret to the end and showing it simply doesn't work for
 965         // RichEdit 2.0 -- force it to still do what we want
 966         ::SendMessage(GetHwnd(), EM_LINESCROLL, 0, GetNumberOfLines());
 967     }
 968 #endif // wxUSE_RICHEDIT
 969 }
 970
 971 void wxTextCtrl::Clear()
 972 {
 973     ::SetWindowText(GetHwnd(), wxEmptyString);
 974
 975 #if wxUSE_RICHEDIT
 976     if ( !IsRich() )
 977 #endif // wxUSE_RICHEDIT
 978     {
 979         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
 980         // but the normal ones don't -- make Clear() behaviour consistent by
 981         // always sending this event
 982
 983         // Windows already sends an update event for single-line
 984         // controls.
 985         if ( m_windowStyle & wxTE_MULTILINE )
 986             SendUpdateEvent();
 987     }
 988 }
 989
 990 #ifdef __WIN32__
 991
 992 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 993 {
 994     SetFocus();
 995
 996     size_t lenOld = GetValue().length();
 997
 998     wxUint32 code = event.GetRawKeyCode();
 999     ::keybd_event((BYTE)code, 0, 0 /* key press */, 0);
1000     ::keybd_event((BYTE)code, 0, KEYEVENTF_KEYUP, 0);
1001
1002     // assume that any alphanumeric key changes the total number of characters
1003     // in the control - this should work in 99% of cases
1004     return GetValue().length() != lenOld;
1005 }
1006
1007 #endif // __WIN32__
1008
1009 // ----------------------------------------------------------------------------
1010 // Clipboard operations
1011 // ----------------------------------------------------------------------------
1012
1013 void wxTextCtrl::Copy()
1014 {
1015     if (CanCopy())
1016     {
1017         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
1018     }
1019 }
1020
1021 void wxTextCtrl::Cut()
1022 {
1023     if (CanCut())
1024     {
1025         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
1026     }
1027 }
1028
1029 void wxTextCtrl::Paste()
1030 {
1031     if (CanPaste())
1032     {
1033         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
1034     }
1035 }
1036
1037 bool wxTextCtrl::HasSelection() const
1038 {
1039     long from, to;
1040     GetSelection(&from, &to);
1041     return from != to;
1042 }
1043
1044 bool wxTextCtrl::CanCopy() const
1045 {
1046     // Can copy if there's a selection
1047     return HasSelection();
1048 }
1049
1050 bool wxTextCtrl::CanCut() const
1051 {
1052     return CanCopy() && IsEditable();
1053 }
1054
1055 bool wxTextCtrl::CanPaste() const
1056 {
1057     if ( !IsEditable() )
1058         return false;
1059
1060 #if wxUSE_RICHEDIT
1061     if ( IsRich() )
1062     {
1063         UINT cf = 0; // 0 == any format
1064
1065         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
1066     }
1067 #endif // wxUSE_RICHEDIT
1068
1069     // Standard edit control: check for straight text on clipboard
1070     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
1071         return false;
1072
1073     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
1074     ::CloseClipboard();
1075
1076     return isTextAvailable;
1077 }
1078
1079 // ----------------------------------------------------------------------------
1080 // Accessors
1081 // ----------------------------------------------------------------------------
1082
1083 void wxTextCtrl::SetEditable(bool editable)
1084 {
1085     HWND hWnd = GetHwnd();
1086     ::SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
1087 }
1088
1089 void wxTextCtrl::SetInsertionPoint(long pos)
1090 {
1091     DoSetSelection(pos, pos);
1092
1093     m_isCaretAtEnd = pos == GetLastPosition();
1094 }
1095
1096 void wxTextCtrl::SetInsertionPointEnd()
1097 {
1098     // we must not do anything if the caret is already there because calling
1099     // SetInsertionPoint() thaws the controls if Freeze() had been called even
1100     // if it doesn't actually move the caret anywhere and so the simple fact of
1101     // doing it results in horrible flicker when appending big amounts of text
1102     // to the control in a few chunks (see DoAddText() test in the text sample)
1103     if ( m_isCaretAtEnd || GetInsertionPoint() == GetLastPosition() )
1104     {
1105         m_isCaretAtEnd = true;
1106         return;
1107     }
1108
1109     long pos;
1110
1111 #if wxUSE_RICHEDIT
1112     if ( m_verRichEdit == 1 )
1113     {
1114         // we don't have to waste time calling GetLastPosition() in this case
1115         pos = -1;
1116     }
1117     else // !RichEdit 1.0
1118 #endif // wxUSE_RICHEDIT
1119     {
1120         pos = GetLastPosition();
1121     }
1122
1123     SetInsertionPoint(pos);
1124 }
1125
1126 long wxTextCtrl::GetInsertionPoint() const
1127 {
1128 #if wxUSE_RICHEDIT
1129     if ( IsRich() )
1130     {
1131         CHARRANGE range;
1132         range.cpMin = 0;
1133         range.cpMax = 0;
1134         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
1135         return range.cpMin;
1136     }
1137 #endif // wxUSE_RICHEDIT
1138
1139     DWORD Pos = (DWORD)::SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
1140     return Pos & 0xFFFF;
1141 }
1142
1143 long wxTextCtrl::GetLastPosition() const
1144 {
1145     int numLines = GetNumberOfLines();
1146     long posStartLastLine = XYToPosition(0, numLines - 1);
1147
1148     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
1149
1150     return posStartLastLine + lenLastLine;
1151 }
1152
1153 // If the return values from and to are the same, there is no
1154 // selection.
1155 void wxTextCtrl::GetSelection(long* from, long* to) const
1156 {
1157 #if wxUSE_RICHEDIT
1158     if ( IsRich() )
1159     {
1160         CHARRANGE charRange;
1161         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
1162
1163         *from = charRange.cpMin;
1164         *to = charRange.cpMax;
1165     }
1166     else
1167 #endif // !wxUSE_RICHEDIT
1168     {
1169         DWORD dwStart, dwEnd;
1170         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
1171
1172         *from = dwStart;
1173         *to = dwEnd;
1174     }
1175 }
1176
1177 bool wxTextCtrl::IsEditable() const
1178 {
1179     // strangely enough, we may be called before the control is created: our
1180     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
1181     // us
1182     if ( !m_hWnd )
1183         return true;
1184
1185     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1186
1187     return (style & ES_READONLY) == 0;
1188 }
1189
1190 // ----------------------------------------------------------------------------
1191 // selection
1192 // ----------------------------------------------------------------------------
1193
1194 void wxTextCtrl::SetSelection(long from, long to)
1195 {
1196     // if from and to are both -1, it means (in wxWidgets) that all text should
1197     // be selected - translate into Windows convention
1198     if ( (from == -1) && (to == -1) )
1199     {
1200         from = 0;
1201         to = -1;
1202     }
1203
1204     DoSetSelection(from, to);
1205 }
1206
1207 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
1208 {
1209     HWND hWnd = GetHwnd();
1210
1211 #if wxUSE_RICHEDIT
1212     if ( IsRich() )
1213     {
1214         CHARRANGE range;
1215         range.cpMin = from;
1216         range.cpMax = to;
1217         ::SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
1218     }
1219     else
1220 #endif // wxUSE_RICHEDIT
1221     {
1222         ::SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
1223     }
1224
1225     if ( scrollCaret && !IsFrozen() )
1226     {
1227 #if wxUSE_RICHEDIT
1228         // richedit 3.0 (i.e. the version living in riched20.dll distributed
1229         // with Windows 2000 and beyond) doesn't honour EM_SCROLLCARET when
1230         // emulating richedit 2.0 unless the control has focus or ECO_NOHIDESEL
1231         // option is set (but it does work ok in richedit 1.0 mode...)
1232         //
1233         // so to make it work we either need to give focus to it here which
1234         // will probably create many problems (dummy focus events; window
1235         // containing the text control being brought to foreground
1236         // unexpectedly; ...) or to temporarily set ECO_NOHIDESEL which may
1237         // create other problems too -- and in fact it does because if we turn
1238         // on/off this style while appending the text to the control, the
1239         // vertical scrollbar never appears in it even if we append tons of
1240         // text and to work around this the only solution I found was to use
1241         // ES_DISABLENOSCROLL
1242         //
1243         // this is very ugly but I don't see any other way to make this work
1244         if ( GetRichVersion() > 1 )
1245         {
1246             if ( !HasFlag(wxTE_NOHIDESEL) )
1247             {
1248                 ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1249                               ECOOP_OR, ECO_NOHIDESEL);
1250             }
1251             //else: everything is already ok
1252         }
1253 #endif // wxUSE_RICHEDIT
1254
1255         ::SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
1256
1257 #if wxUSE_RICHEDIT
1258         // restore ECO_NOHIDESEL if we changed it
1259         if ( GetRichVersion() > 1 && !HasFlag(wxTE_NOHIDESEL) )
1260         {
1261             ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1262                           ECOOP_AND, ~ECO_NOHIDESEL);
1263         }
1264 #endif // wxUSE_RICHEDIT
1265     }
1266 }
1267
1268 // ----------------------------------------------------------------------------
1269 // Working with files
1270 // ----------------------------------------------------------------------------
1271
1272 bool wxTextCtrl::LoadFile(const wxString& file)
1273 {
1274     if ( wxTextCtrlBase::LoadFile(file) )
1275     {
1276         // update the size limit if needed
1277         AdjustSpaceLimit();
1278
1279         return true;
1280     }
1281
1282     return false;
1283 }
1284
1285 // ----------------------------------------------------------------------------
1286 // Editing
1287 // ----------------------------------------------------------------------------
1288
1289 void wxTextCtrl::Replace(long from, long to, const wxString& value)
1290 {
1291     // Set selection and remove it
1292     DoSetSelection(from, to, false /* don't scroll caret into view */);
1293
1294     DoWriteText(value, true /* selection only */);
1295 }
1296
1297 void wxTextCtrl::Remove(long from, long to)
1298 {
1299     Replace(from, to, wxEmptyString);
1300 }
1301
1302 bool wxTextCtrl::IsModified() const
1303 {
1304     return ::SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1305 }
1306
1307 void wxTextCtrl::MarkDirty()
1308 {
1309     ::SendMessage(GetHwnd(), EM_SETMODIFY, TRUE, 0L);
1310 }
1311
1312 void wxTextCtrl::DiscardEdits()
1313 {
1314     ::SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
1315 }
1316
1317 int wxTextCtrl::GetNumberOfLines() const
1318 {
1319     return (int)::SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
1320 }
1321
1322 // ----------------------------------------------------------------------------
1323 // Positions <-> coords
1324 // ----------------------------------------------------------------------------
1325
1326 long wxTextCtrl::XYToPosition(long x, long y) const
1327 {
1328     // This gets the char index for the _beginning_ of this line
1329     long charIndex = ::SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
1330
1331     return charIndex + x;
1332 }
1333
1334 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1335 {
1336     HWND hWnd = GetHwnd();
1337
1338     // This gets the line number containing the character
1339     long lineNo;
1340 #if wxUSE_RICHEDIT
1341     if ( IsRich() )
1342     {
1343         lineNo = ::SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1344     }
1345     else
1346 #endif // wxUSE_RICHEDIT
1347     {
1348         lineNo = ::SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1349     }
1350
1351     if ( lineNo == -1 )
1352     {
1353         // no such line
1354         return false;
1355     }
1356
1357     // This gets the char index for the _beginning_ of this line
1358     long charIndex = ::SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1359     if ( charIndex == -1 )
1360     {
1361         return false;
1362     }
1363
1364     // The X position must therefore be the different between pos and charIndex
1365     if ( x )
1366         *x = pos - charIndex;
1367     if ( y )
1368         *y = lineNo;
1369
1370     return true;
1371 }
1372
1373 wxTextCtrlHitTestResult
1374 wxTextCtrl::HitTest(const wxPoint& pt, long *posOut) const
1375 {
1376     // first get the position from Windows
1377     LPARAM lParam;
1378
1379 #if wxUSE_RICHEDIT
1380     POINTL ptl;
1381     if ( IsRich() )
1382     {
1383         // for rich edit controls the position is passed iva the struct fields
1384         ptl.x = pt.x;
1385         ptl.y = pt.y;
1386         lParam = (LPARAM)&ptl;
1387     }
1388     else
1389 #endif // wxUSE_RICHEDIT
1390     {
1391         // for the plain ones, we are limited to 16 bit positions which are
1392         // combined in a single 32 bit value
1393         lParam = MAKELPARAM(pt.x, pt.y);
1394     }
1395
1396     LRESULT pos = ::SendMessage(GetHwnd(), EM_CHARFROMPOS, 0, lParam);
1397
1398     if ( pos == -1 )
1399     {
1400         // this seems to indicate an error...
1401         return wxTE_HT_UNKNOWN;
1402     }
1403
1404 #if wxUSE_RICHEDIT
1405     if ( !IsRich() )
1406 #endif // wxUSE_RICHEDIT
1407     {
1408         // for plain EDIT controls the higher word contains something else
1409         pos = LOWORD(pos);
1410     }
1411
1412
1413     // next determine where it is relatively to our point: EM_CHARFROMPOS
1414     // always returns the closest character but we need to be more precise, so
1415     // double check that we really are where it pretends
1416     POINTL ptReal;
1417
1418 #if wxUSE_RICHEDIT
1419     // FIXME: we need to distinguish between richedit 2 and 3 here somehow but
1420     //        we don't know how to do it
1421     if ( IsRich() )
1422     {
1423         ::SendMessage(GetHwnd(), EM_POSFROMCHAR, (WPARAM)&ptReal, pos);
1424     }
1425     else
1426 #endif // wxUSE_RICHEDIT
1427     {
1428         LRESULT lRc = ::SendMessage(GetHwnd(), EM_POSFROMCHAR, pos, 0);
1429
1430         if ( lRc == -1 )
1431         {
1432             // this is apparently returned when pos corresponds to the last
1433             // position
1434             ptReal.x =
1435             ptReal.y = 0;
1436         }
1437         else
1438         {
1439             ptReal.x = LOWORD(lRc);
1440             ptReal.y = HIWORD(lRc);
1441         }
1442     }
1443
1444     wxTextCtrlHitTestResult rc;
1445
1446     if ( pt.y > ptReal.y + GetCharHeight() )
1447         rc = wxTE_HT_BELOW;
1448     else if ( pt.x > ptReal.x + GetCharWidth() )
1449         rc = wxTE_HT_BEYOND;
1450     else
1451         rc = wxTE_HT_ON_TEXT;
1452
1453     if ( posOut )
1454         *posOut = pos;
1455
1456     return rc;
1457 }
1458
1459 // ----------------------------------------------------------------------------
1460 //
1461 // ----------------------------------------------------------------------------
1462
1463 void wxTextCtrl::ShowPosition(long pos)
1464 {
1465     HWND hWnd = GetHwnd();
1466
1467     // To scroll to a position, we pass the number of lines and characters
1468     // to scroll *by*. This means that we need to:
1469     // (1) Find the line position of the current line.
1470     // (2) Find the line position of pos.
1471     // (3) Scroll by (pos - current).
1472     // For now, ignore the horizontal scrolling.
1473
1474     // Is this where scrolling is relative to - the line containing the caret?
1475     // Or is the first visible line??? Try first visible line.
1476 //    int currentLineLineNo1 = (int)::SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1477
1478     int currentLineLineNo = (int)::SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1479
1480     int specifiedLineLineNo = (int)::SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1481
1482     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1483
1484     if (linesToScroll != 0)
1485       (void)::SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1486
1487     // be pessimistic
1488     m_isCaretAtEnd = false;
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         // it's not necessarily at the end any more
1567         m_isCaretAtEnd = false;
1568     }
1569 }
1570
1571 void wxTextCtrl::Redo()
1572 {
1573     if (CanRedo())
1574     {
1575 #if wxUSE_RICHEDIT
1576         if (GetRichVersion() > 1)
1577             ::SendMessage(GetHwnd(), EM_REDO, 0, 0);
1578         else
1579 #endif
1580         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1581         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1582
1583         // it's not necessarily at the end any more
1584         m_isCaretAtEnd = false;
1585     }
1586 }
1587
1588 bool wxTextCtrl::CanUndo() const
1589 {
1590     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1591 }
1592
1593 bool wxTextCtrl::CanRedo() const
1594 {
1595 #if wxUSE_RICHEDIT
1596     if (GetRichVersion() > 1)
1597         return ::SendMessage(GetHwnd(), EM_CANREDO, 0, 0) != 0;
1598     else
1599 #endif
1600     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1601 }
1602
1603 // ----------------------------------------------------------------------------
1604 // caret handling (Windows only)
1605 // ----------------------------------------------------------------------------
1606
1607 bool wxTextCtrl::ShowNativeCaret(bool show)
1608 {
1609     if ( show != m_isNativeCaretShown )
1610     {
1611         if ( !(show ? ::ShowCaret(GetHwnd()) : ::HideCaret(GetHwnd())) )
1612         {
1613             // not an error, may simply indicate that it's not shown/hidden
1614             // yet (i.e. it had been hidden/showh 2 times before)
1615             return false;
1616         }
1617
1618         m_isNativeCaretShown = show;
1619     }
1620
1621     return true;
1622 }
1623
1624 // ----------------------------------------------------------------------------
1625 // implemenation details
1626 // ----------------------------------------------------------------------------
1627
1628 void wxTextCtrl::Command(wxCommandEvent & event)
1629 {
1630     SetValue(event.GetString());
1631     ProcessCommand (event);
1632 }
1633
1634 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1635 {
1636     // By default, load the first file into the text window.
1637     if (event.GetNumberOfFiles() > 0)
1638     {
1639         LoadFile(event.GetFiles()[0]);
1640     }
1641 }
1642
1643 // ----------------------------------------------------------------------------
1644 // kbd input processing
1645 // ----------------------------------------------------------------------------
1646
1647 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1648 {
1649     MSG *msg = (MSG *)pMsg;
1650
1651     // check for our special keys here: if we don't do it and the parent frame
1652     // uses them as accelerators, they wouldn't work at all, so we disable
1653     // usual preprocessing for them
1654     if ( msg->message == WM_KEYDOWN )
1655     {
1656         WORD vkey = (WORD) msg->wParam;
1657         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1658         {
1659             if ( vkey == VK_BACK )
1660                 return false;
1661         }
1662         else // no Alt
1663         {
1664             // we want to process some Ctrl-foo and Shift-bar but no key
1665             // combinations without either Ctrl or Shift nor with both of them
1666             // pressed
1667             const int ctrl = wxIsCtrlDown(),
1668                       shift = wxIsShiftDown();
1669             switch ( ctrl + shift )
1670             {
1671                 default:
1672                     wxFAIL_MSG( _T("how many modifiers have we got?") );
1673                     // fall through
1674
1675                 case 0:
1676                 case 2:
1677                     break;
1678
1679                 case 1:
1680                     // either Ctrl or Shift pressed
1681                     if ( ctrl )
1682                     {
1683                         switch ( vkey )
1684                         {
1685                             case 'C':
1686                             case 'V':
1687                             case 'X':
1688                             case VK_INSERT:
1689                             case VK_DELETE:
1690                             case VK_HOME:
1691                             case VK_END:
1692                                 return false;
1693                         }
1694                     }
1695                     else // Shift is pressed
1696                     {
1697                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1698                             return false;
1699                     }
1700             }
1701         }
1702     }
1703
1704     return wxControl::MSWShouldPreProcessMessage(pMsg);
1705 }
1706
1707 void wxTextCtrl::OnChar(wxKeyEvent& event)
1708 {
1709     switch ( event.GetKeyCode() )
1710     {
1711         case WXK_RETURN:
1712             if ( !HasFlag(wxTE_MULTILINE) )
1713             {
1714                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1715                 InitCommandEvent(event);
1716                 event.SetString(GetValue());
1717                 if ( GetEventHandler()->ProcessEvent(event) )
1718                     return;
1719             }
1720             //else: multiline controls need Enter for themselves
1721
1722             break;
1723
1724         case WXK_TAB:
1725             // ok, so this is getting absolutely ridiculous but I don't see
1726             // any other way to fix this bug: when a multiline text control is
1727             // inside a wxFrame, we need to generate the navigation event as
1728             // otherwise nothing happens at all, but when the same control is
1729             // created inside a dialog, IsDialogMessage() *does* switch focus
1730             // all by itself and so if we do it here as well, it is advanced
1731             // twice and goes to the next control... to prevent this from
1732             // happening we're doing this ugly check, the logic being that if
1733             // we don't have focus then it had been already changed to the next
1734             // control
1735             //
1736             // the right thing to do would, of course, be to understand what
1737             // the hell is IsDialogMessage() doing but this is beyond my feeble
1738             // forces at the moment unfortunately
1739             if ( !(m_windowStyle & wxTE_PROCESS_TAB))
1740             {
1741                 if ( FindFocus() == this )
1742                 {
1743                     int flags = 0;
1744                     if (!event.ShiftDown())
1745                         flags |= wxNavigationKeyEvent::IsForward ;
1746                     if (event.ControlDown())
1747                         flags |= wxNavigationKeyEvent::WinChange ;
1748                     if (Navigate(flags))
1749                         return;
1750                 }
1751             }
1752             else
1753             {
1754                 // Insert tab since calling the default Windows handler
1755                 // doesn't seem to do it
1756                 WriteText(wxT("\t"));
1757             }
1758             break;
1759     }
1760
1761     // no, we didn't process it
1762     event.Skip();
1763 }
1764
1765 WXLRESULT wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1766 {
1767     WXLRESULT lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1768
1769     if ( nMsg == WM_GETDLGCODE )
1770     {
1771         // we always want the chars and the arrows: the arrows for navigation
1772         // and the chars because we want Ctrl-C to work even in a read only
1773         // control
1774         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1775
1776         if ( IsEditable() )
1777         {
1778             // we may have several different cases:
1779             // 1. normal case: both TAB and ENTER are used for dlg navigation
1780             // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1781             //    next control in the dialog
1782             // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1783             //    navigation
1784             // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to go
1785             //    to the next control
1786
1787             // the multiline edit control should always get <Return> for itself
1788             if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1789                 lDlgCode |= DLGC_WANTMESSAGE;
1790
1791             if ( HasFlag(wxTE_PROCESS_TAB) )
1792                 lDlgCode |= DLGC_WANTTAB;
1793
1794             lRc |= lDlgCode;
1795         }
1796         else // !editable
1797         {
1798             // NB: use "=", not "|=" as the base class version returns the
1799             //     same flags is this state as usual (i.e. including
1800             //     DLGC_WANTMESSAGE). This is strange (how does it work in the
1801             //     native Win32 apps?) but for now live with it.
1802             lRc = lDlgCode;
1803         }
1804     }
1805
1806     return lRc;
1807 }
1808
1809 // ----------------------------------------------------------------------------
1810 // text control event processing
1811 // ----------------------------------------------------------------------------
1812
1813 bool wxTextCtrl::SendUpdateEvent()
1814 {
1815     switch ( m_updatesCount )
1816     {
1817         case 0:
1818             // remember that we've got an update
1819             m_updatesCount++;
1820             break;
1821
1822         case 1:
1823             // we had already sent one event since the last control modification
1824             return false;
1825
1826         default:
1827             wxFAIL_MSG( _T("unexpected wxTextCtrl::m_updatesCount value") );
1828             // fall through
1829
1830         case -1:
1831             // we hadn't updated the control ourselves, this event comes from
1832             // the user, don't need to ignore it nor update the count
1833             break;
1834     }
1835
1836     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1837     InitCommandEvent(event);
1838     event.SetString(GetValue());
1839
1840     return ProcessCommand(event);
1841 }
1842
1843 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1844 {
1845     switch ( param )
1846     {
1847         case EN_SETFOCUS:
1848         case EN_KILLFOCUS:
1849             {
1850                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1851                                                          : wxEVT_SET_FOCUS,
1852                                    m_windowId);
1853                 event.SetEventObject(this);
1854                 GetEventHandler()->ProcessEvent(event);
1855             }
1856             break;
1857
1858         case EN_CHANGE:
1859             SendUpdateEvent();
1860             break;
1861
1862         case EN_MAXTEXT:
1863             // the text size limit has been hit -- try to increase it
1864             if ( !AdjustSpaceLimit() )
1865             {
1866                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1867                 InitCommandEvent(event);
1868                 event.SetString(GetValue());
1869                 ProcessCommand(event);
1870             }
1871             break;
1872
1873             // the other edit notification messages are not processed
1874         default:
1875             return false;
1876     }
1877
1878     // processed
1879     return true;
1880 }
1881
1882 WXHBRUSH wxTextCtrl::MSWControlColor(WXHDC hDC)
1883 {
1884     if ( !IsEnabled() && !HasFlag(wxTE_MULTILINE) )
1885         return MSWControlColorDisabled(hDC);
1886
1887     return wxTextCtrlBase::MSWControlColorSolid(hDC);
1888 }
1889
1890 bool wxTextCtrl::AdjustSpaceLimit()
1891 {
1892     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1893
1894     // HACK: we try to automatically extend the limit for the amount of text
1895     //       to allow (interactively) entering more than 64Kb of text under
1896     //       Win9x but we shouldn't reset the text limit which was previously
1897     //       set explicitly with SetMaxLength()
1898     //
1899     //       we could solve this by storing the limit we set in wxTextCtrl but
1900     //       to save space we prefer to simply test here the actual limit
1901     //       value: we consider that SetMaxLength() can only be called for
1902     //       values < 32Kb
1903     if ( limit < 0x8000 )
1904     {
1905         // we've got more text than limit set by SetMaxLength()
1906         return false;
1907     }
1908
1909     unsigned int len = ::GetWindowTextLength(GetHwnd());
1910     if ( len >= limit )
1911     {
1912         limit = len + 0x8000;    // 32Kb
1913
1914 #if wxUSE_RICHEDIT
1915         if ( IsRich() )
1916         {
1917             // as a nice side effect, this also allows passing limit > 64Kb
1918             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1919         }
1920         else
1921 #endif // wxUSE_RICHEDIT
1922         {
1923             if ( limit > 0xffff )
1924             {
1925                 // this will set it to a platform-dependent maximum (much more
1926                 // than 64Kb under NT)
1927                 limit = 0;
1928             }
1929
1930             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1931         }
1932     }
1933
1934     // we changed the limit
1935     return true;
1936 }
1937
1938 bool wxTextCtrl::AcceptsFocus() const
1939 {
1940     // we don't want focus if we can't be edited unless we're a multiline
1941     // control because then it might be still nice to get focus from keyboard
1942     // to be able to scroll it without mouse
1943     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
1944 }
1945
1946 wxSize wxTextCtrl::DoGetBestSize() const
1947 {
1948     int cx, cy;
1949     wxGetCharSize(GetHWND(), &cx, &cy, GetFont());
1950
1951     int wText = DEFAULT_ITEM_WIDTH;
1952
1953     int hText = cy;
1954     if ( m_windowStyle & wxTE_MULTILINE )
1955     {
1956         hText *= wxMax(GetNumberOfLines(), 5);
1957     }
1958     //else: for single line control everything is ok
1959
1960     // we have to add the adjustments for the control height only once, not
1961     // once per line, so do it after multiplication above
1962     hText += EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy) - cy;
1963
1964     return wxSize(wText, hText);
1965 }
1966
1967 // ----------------------------------------------------------------------------
1968 // standard handlers for standard edit menu events
1969 // ----------------------------------------------------------------------------
1970
1971 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1972 {
1973     Cut();
1974 }
1975
1976 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1977 {
1978     Copy();
1979 }
1980
1981 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1982 {
1983     Paste();
1984 }
1985
1986 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1987 {
1988     Undo();
1989 }
1990
1991 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1992 {
1993     Redo();
1994 }
1995
1996 void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
1997 {
1998     long from, to;
1999     GetSelection(& from, & to);
2000     if (from != -1 && to != -1)
2001         Remove(from, to);
2002 }
2003
2004 void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2005 {
2006     SetSelection(-1, -1);
2007 }
2008
2009 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2010 {
2011     event.Enable( CanCut() );
2012 }
2013
2014 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2015 {
2016     event.Enable( CanCopy() );
2017 }
2018
2019 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2020 {
2021     event.Enable( CanPaste() );
2022 }
2023
2024 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2025 {
2026     event.Enable( CanUndo() );
2027 }
2028
2029 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2030 {
2031     event.Enable( CanRedo() );
2032 }
2033
2034 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
2035 {
2036     long from, to;
2037     GetSelection(& from, & to);
2038     event.Enable(from != -1 && to != -1 && from != to && IsEditable()) ;
2039 }
2040
2041 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2042 {
2043     event.Enable(GetLastPosition() > 0);
2044 }
2045
2046 void wxTextCtrl::OnRightClick(wxMouseEvent& event)
2047 {
2048 #if wxUSE_RICHEDIT
2049     if (IsRich())
2050     {
2051         if (!m_privateContextMenu)
2052         {
2053             m_privateContextMenu = new wxMenu;
2054             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
2055             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
2056             m_privateContextMenu->AppendSeparator();
2057             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
2058             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
2059             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
2060             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
2061             m_privateContextMenu->AppendSeparator();
2062             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
2063         }
2064         PopupMenu(m_privateContextMenu, event.GetPosition());
2065         return;
2066     }
2067     else
2068 #endif
2069     event.Skip();
2070 }
2071
2072 void wxTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
2073 {
2074     // be sure the caret remains invisible if the user had hidden it
2075     if ( !m_isNativeCaretShown )
2076     {
2077         ::HideCaret(GetHwnd());
2078     }
2079 }
2080
2081 // ----------------------------------------------------------------------------
2082 // Default colors for MSW text control
2083 //
2084 // Set default background color to the native white instead of
2085 // the default wxSYS_COLOUR_BTNFACE (is triggered with wxNullColour).
2086 // ----------------------------------------------------------------------------
2087
2088 wxVisualAttributes wxTextCtrl::GetDefaultAttributes() const
2089 {
2090     wxVisualAttributes attrs;
2091     attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
2092     attrs.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
2093     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW); //white
2094
2095     return attrs;
2096 }
2097
2098 // the rest of the file only deals with the rich edit controls
2099 #if wxUSE_RICHEDIT
2100
2101 // ----------------------------------------------------------------------------
2102 // EN_LINK processing
2103 // ----------------------------------------------------------------------------
2104
2105 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
2106 {
2107     NMHDR *hdr = (NMHDR* )lParam;
2108     switch ( hdr->code )
2109     {
2110        case EN_MSGFILTER:
2111             {
2112                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
2113                 UINT msg = msgf->msg;
2114
2115                 // this is a bit crazy but richedit 1.0 sends us all mouse
2116                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
2117                 // generate the wxWin events for this message manually
2118                 //
2119                 // NB: in fact, this is still not totally correct as it does
2120                 //     send us WM_LBUTTONUP if the selection was cleared by the
2121                 //     last click -- so currently we get 2 events in this case,
2122                 //     but as I don't see any obvious way to check for this I
2123                 //     leave this code in place because it's still better than
2124                 //     not getting left up events at all
2125                 if ( msg == WM_LBUTTONUP )
2126                 {
2127                     WXUINT flags = msgf->wParam;
2128                     int x = GET_X_LPARAM(msgf->lParam),
2129                         y = GET_Y_LPARAM(msgf->lParam);
2130
2131                     HandleMouseEvent(msg, x, y, flags);
2132                 }
2133             }
2134
2135             // return true to process the event (and false to ignore it)
2136             return true;
2137
2138         case EN_LINK:
2139             {
2140                 const ENLINK *enlink = (ENLINK *)hdr;
2141
2142                 switch ( enlink->msg )
2143                 {
2144                     case WM_SETCURSOR:
2145                         // ok, so it is hardcoded - do we really nee to
2146                         // customize it?
2147                         {
2148                             wxCursor cur(wxCURSOR_HAND);
2149                             ::SetCursor(GetHcursorOf(cur));
2150                             *result = TRUE;
2151                             break;
2152                         }
2153
2154                     case WM_MOUSEMOVE:
2155                     case WM_LBUTTONDOWN:
2156                     case WM_LBUTTONUP:
2157                     case WM_LBUTTONDBLCLK:
2158                     case WM_RBUTTONDOWN:
2159                     case WM_RBUTTONUP:
2160                     case WM_RBUTTONDBLCLK:
2161                         // send a mouse event
2162                         {
2163                             static const wxEventType eventsMouse[] =
2164                             {
2165                                 wxEVT_MOTION,
2166                                 wxEVT_LEFT_DOWN,
2167                                 wxEVT_LEFT_UP,
2168                                 wxEVT_LEFT_DCLICK,
2169                                 wxEVT_RIGHT_DOWN,
2170                                 wxEVT_RIGHT_UP,
2171                                 wxEVT_RIGHT_DCLICK,
2172                             };
2173
2174                             // the event ids are consecutive
2175                             wxMouseEvent
2176                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
2177
2178                             InitMouseEvent(evtMouse,
2179                                            GET_X_LPARAM(enlink->lParam),
2180                                            GET_Y_LPARAM(enlink->lParam),
2181                                            enlink->wParam);
2182
2183                             wxTextUrlEvent event(m_windowId, evtMouse,
2184                                                  enlink->chrg.cpMin,
2185                                                  enlink->chrg.cpMax);
2186
2187                             InitCommandEvent(event);
2188
2189                             *result = ProcessCommand(event);
2190                         }
2191                         break;
2192                 }
2193             }
2194             return true;
2195     }
2196
2197     // not processed, leave it to the base class
2198     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
2199 }
2200
2201 // ----------------------------------------------------------------------------
2202 // colour setting for the rich edit controls
2203 // ----------------------------------------------------------------------------
2204
2205 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
2206 {
2207     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
2208     {
2209         // colour didn't really change
2210         return false;
2211     }
2212
2213     if ( IsRich() )
2214     {
2215         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
2216         // EM_SETBKGNDCOLOR additionally
2217         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
2218     }
2219
2220     return true;
2221 }
2222
2223 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
2224 {
2225     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
2226     {
2227         // colour didn't really change
2228         return false;
2229     }
2230
2231     if ( IsRich() )
2232     {
2233         // change the colour of everything
2234         CHARFORMAT cf;
2235         wxZeroMemory(cf);
2236         cf.cbSize = sizeof(cf);
2237         cf.dwMask = CFM_COLOR;
2238         cf.crTextColor = wxColourToRGB(colour);
2239         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
2240     }
2241
2242     return true;
2243 }
2244
2245 // ----------------------------------------------------------------------------
2246 // styling support for rich edit controls
2247 // ----------------------------------------------------------------------------
2248
2249 #if wxUSE_RICHEDIT
2250
2251 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2252 {
2253     if ( !IsRich() )
2254     {
2255         // can't do it with normal text control
2256         return false;
2257     }
2258
2259     // the richedit 1.0 doesn't handle setting background colour, so don't
2260     // even try to do anything if it's the only thing we want to change
2261     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() &&
2262         !style.HasLeftIndent() && !style.HasRightIndent() && !style.HasAlignment() &&
2263         !style.HasTabs() )
2264     {
2265         // nothing to do: return true if there was really nothing to do and
2266         // false if we failed to set bg colour
2267         return !style.HasBackgroundColour();
2268     }
2269
2270     // order the range if needed
2271     if ( start > end )
2272     {
2273         long tmp = start;
2274         start = end;
2275         end = tmp;
2276     }
2277
2278     // we can only change the format of the selection, so select the range we
2279     // want and restore the old selection later
2280     long startOld, endOld;
2281     GetSelection(&startOld, &endOld);
2282
2283     // but do we really have to change the selection?
2284     bool changeSel = start != startOld || end != endOld;
2285
2286     if ( changeSel )
2287     {
2288         DoSetSelection(start, end, false /* don't scroll caret into view */);
2289     }
2290
2291     // initialize CHARFORMAT struct
2292 #if wxUSE_RICHEDIT2
2293     CHARFORMAT2 cf;
2294 #else
2295     CHARFORMAT cf;
2296 #endif
2297
2298     wxZeroMemory(cf);
2299
2300     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2301     // CHARFORMAT in that case
2302 #if wxUSE_RICHEDIT2
2303     if ( m_verRichEdit == 1 )
2304     {
2305         // this is the only thing the control is going to grok
2306         cf.cbSize = sizeof(CHARFORMAT);
2307     }
2308     else
2309 #endif
2310     {
2311         // CHARFORMAT or CHARFORMAT2
2312         cf.cbSize = sizeof(cf);
2313     }
2314
2315     if ( style.HasFont() )
2316     {
2317         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
2318         //     but using it doesn't seem to hurt neither so leaving it for now
2319
2320         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
2321                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
2322
2323         // fill in data from LOGFONT but recalculate lfHeight because we need
2324         // the real height in twips and not the negative number which
2325         // wxFillLogFont() returns (this is correct in general and works with
2326         // the Windows font mapper, but not here)
2327         LOGFONT lf;
2328         wxFillLogFont(&lf, &style.GetFont());
2329         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
2330         cf.bCharSet = lf.lfCharSet;
2331         cf.bPitchAndFamily = lf.lfPitchAndFamily;
2332         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
2333
2334         // also deal with underline/italic/bold attributes: note that we must
2335         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
2336         // style to allow clearing it
2337         if ( lf.lfItalic )
2338         {
2339             cf.dwEffects |= CFE_ITALIC;
2340         }
2341
2342         if ( lf.lfWeight == FW_BOLD )
2343         {
2344             cf.dwEffects |= CFE_BOLD;
2345         }
2346
2347         if ( lf.lfUnderline )
2348         {
2349             cf.dwEffects |= CFE_UNDERLINE;
2350         }
2351
2352         // strikeout fonts are not supported by wxWidgets
2353     }
2354
2355     if ( style.HasTextColour() )
2356     {
2357         cf.dwMask |= CFM_COLOR;
2358         cf.crTextColor = wxColourToRGB(style.GetTextColour());
2359     }
2360
2361 #if wxUSE_RICHEDIT2
2362     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
2363     {
2364         cf.dwMask |= CFM_BACKCOLOR;
2365         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
2366     }
2367 #endif // wxUSE_RICHEDIT2
2368
2369     // do format the selection
2370     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
2371                             SCF_SELECTION, (LPARAM)&cf) != 0;
2372     if ( !ok )
2373     {
2374         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
2375     }
2376
2377     // now do the paragraph formatting
2378     PARAFORMAT2 pf;
2379     wxZeroMemory(pf);
2380     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2381     // PARAFORMAT in that case
2382 #if wxUSE_RICHEDIT2
2383     if ( m_verRichEdit == 1 )
2384     {
2385         // this is the only thing the control is going to grok
2386         pf.cbSize = sizeof(PARAFORMAT);
2387     }
2388     else
2389 #endif
2390     {
2391         // PARAFORMAT or PARAFORMAT2
2392         pf.cbSize = sizeof(pf);
2393     }
2394
2395     if (style.HasAlignment())
2396     {
2397         pf.dwMask |= PFM_ALIGNMENT;
2398         if (style.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
2399             pf.wAlignment = PFA_RIGHT;
2400         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
2401             pf.wAlignment = PFA_CENTER;
2402         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
2403             pf.wAlignment = PFA_JUSTIFY;
2404         else
2405             pf.wAlignment = PFA_LEFT;
2406     }
2407
2408     if (style.HasLeftIndent())
2409     {
2410         pf.dwMask |= PFM_STARTINDENT | PFM_OFFSET;
2411
2412         // Convert from 1/10 mm to TWIPS
2413         pf.dxStartIndent = (int) (((double) style.GetLeftIndent()) * mm2twips / 10.0) ;
2414         pf.dxOffset = (int) (((double) style.GetLeftSubIndent()) * mm2twips / 10.0) ;
2415     }
2416
2417     if (style.HasRightIndent())
2418     {
2419         pf.dwMask |= PFM_RIGHTINDENT;
2420
2421         // Convert from 1/10 mm to TWIPS
2422         pf.dxRightIndent = (int) (((double) style.GetRightIndent()) * mm2twips / 10.0) ;
2423     }
2424
2425     if (style.HasTabs())
2426     {
2427         pf.dwMask |= PFM_TABSTOPS;
2428
2429         const wxArrayInt& tabs = style.GetTabs();
2430
2431         pf.cTabCount = (SHORT)wxMin(tabs.GetCount(), MAX_TAB_STOPS);
2432         size_t i;
2433         for (i = 0; i < (size_t) pf.cTabCount; i++)
2434         {
2435             // Convert from 1/10 mm to TWIPS
2436             pf.rgxTabs[i] = (int) (((double) tabs[i]) * mm2twips / 10.0) ;
2437         }
2438     }
2439
2440     if (pf.dwMask != 0)
2441     {
2442         // do format the selection
2443         bool ok = ::SendMessage(GetHwnd(), EM_SETPARAFORMAT,
2444             0, (LPARAM) &pf) != 0;
2445         if ( !ok )
2446         {
2447             wxLogDebug(_T("SendMessage(EM_SETPARAFORMAT, 0) failed"));
2448         }
2449     }
2450
2451     if ( changeSel )
2452     {
2453         // restore the original selection
2454         DoSetSelection(startOld, endOld, false);
2455     }
2456
2457     return ok;
2458 }
2459
2460 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2461 {
2462     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2463         return false;
2464
2465     if ( IsEditable() )
2466     {
2467         // we have to do this or the style wouldn't apply for the text typed by
2468         // the user
2469         long posLast = GetLastPosition();
2470         SetStyle(posLast, posLast, m_defaultStyle);
2471     }
2472
2473     return true;
2474 }
2475
2476 bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
2477 {
2478     if ( !IsRich() )
2479     {
2480         // can't do it with normal text control
2481         return false;
2482     }
2483
2484     // initialize CHARFORMAT struct
2485 #if wxUSE_RICHEDIT2
2486     CHARFORMAT2 cf;
2487 #else
2488     CHARFORMAT cf;
2489 #endif
2490
2491     wxZeroMemory(cf);
2492
2493     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2494     // CHARFORMAT in that case
2495 #if wxUSE_RICHEDIT2
2496     if ( m_verRichEdit == 1 )
2497     {
2498         // this is the only thing the control is going to grok
2499         cf.cbSize = sizeof(CHARFORMAT);
2500     }
2501     else
2502 #endif
2503     {
2504         // CHARFORMAT or CHARFORMAT2
2505         cf.cbSize = sizeof(cf);
2506     }
2507     // we can only change the format of the selection, so select the range we
2508     // want and restore the old selection later
2509     long startOld, endOld;
2510     GetSelection(&startOld, &endOld);
2511
2512     // but do we really have to change the selection?
2513     bool changeSel = position != startOld || position != endOld;
2514
2515     if ( changeSel )
2516     {
2517         DoSetSelection(position, position, false /* don't scroll caret into view */);
2518     }
2519
2520     // get the selection formatting
2521     (void) ::SendMessage(GetHwnd(), EM_GETCHARFORMAT,
2522                             SCF_SELECTION, (LPARAM)&cf) ;
2523
2524
2525     LOGFONT lf;
2526     lf.lfHeight = cf.yHeight;
2527     lf.lfWidth = 0;
2528     lf.lfCharSet = ANSI_CHARSET; // FIXME: how to get correct charset?
2529     lf.lfClipPrecision = 0;
2530     lf.lfEscapement = 0;
2531     wxStrcpy(lf.lfFaceName, cf.szFaceName);
2532
2533     //NOTE:  we _MUST_ set each of these values to _something_ since we
2534     //do not call wxZeroMemory on the LOGFONT lf
2535     if (cf.dwEffects & CFE_ITALIC)
2536         lf.lfItalic = TRUE;
2537     else
2538         lf.lfItalic = FALSE;
2539
2540     lf.lfOrientation = 0;
2541     lf.lfPitchAndFamily = cf.bPitchAndFamily;
2542     lf.lfQuality = 0;
2543
2544     if (cf.dwEffects & CFE_STRIKEOUT)
2545         lf.lfStrikeOut = TRUE;
2546     else
2547         lf.lfStrikeOut = FALSE;
2548
2549     if (cf.dwEffects & CFE_UNDERLINE)
2550         lf.lfUnderline = TRUE;
2551     else
2552         lf.lfUnderline = FALSE;
2553
2554     if (cf.dwEffects & CFE_BOLD)
2555         lf.lfWeight = FW_BOLD;
2556     else
2557         lf.lfWeight = FW_NORMAL;
2558
2559     wxFont font = wxCreateFontFromLogFont(& lf);
2560     if (font.Ok())
2561     {
2562         style.SetFont(font);
2563     }
2564     style.SetTextColour(wxColour(cf.crTextColor));
2565
2566 #if wxUSE_RICHEDIT2
2567     if ( m_verRichEdit != 1 )
2568     {
2569         // cf.dwMask |= CFM_BACKCOLOR;
2570         style.SetBackgroundColour(wxColour(cf.crBackColor));
2571     }
2572 #endif // wxUSE_RICHEDIT2
2573
2574     // now get the paragraph formatting
2575     PARAFORMAT2 pf;
2576     wxZeroMemory(pf);
2577     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2578     // PARAFORMAT in that case
2579 #if wxUSE_RICHEDIT2
2580     if ( m_verRichEdit == 1 )
2581     {
2582         // this is the only thing the control is going to grok
2583         pf.cbSize = sizeof(PARAFORMAT);
2584     }
2585     else
2586 #endif
2587     {
2588         // PARAFORMAT or PARAFORMAT2
2589         pf.cbSize = sizeof(pf);
2590     }
2591
2592     // do format the selection
2593     (void) ::SendMessage(GetHwnd(), EM_GETPARAFORMAT, 0, (LPARAM) &pf) ;
2594
2595     style.SetLeftIndent( (int) ((double) pf.dxStartIndent * twips2mm * 10.0), (int) ((double) pf.dxOffset * twips2mm * 10.0) );
2596     style.SetRightIndent( (int) ((double) pf.dxRightIndent * twips2mm * 10.0) );
2597
2598     if (pf.wAlignment == PFA_CENTER)
2599         style.SetAlignment(wxTEXT_ALIGNMENT_CENTRE);
2600     else if (pf.wAlignment == PFA_RIGHT)
2601         style.SetAlignment(wxTEXT_ALIGNMENT_RIGHT);
2602     else if (pf.wAlignment == PFA_JUSTIFY)
2603         style.SetAlignment(wxTEXT_ALIGNMENT_JUSTIFIED);
2604     else
2605         style.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
2606
2607     wxArrayInt tabStops;
2608     size_t i;
2609     for (i = 0; i < (size_t) pf.cTabCount; i++)
2610     {
2611         tabStops.Add( (int) ((double) (pf.rgxTabs[i] & 0xFFFF) * twips2mm * 10.0) );
2612     }
2613
2614     if ( changeSel )
2615     {
2616         // restore the original selection
2617         DoSetSelection(startOld, endOld, false);
2618     }
2619
2620     return true;
2621 }
2622
2623 #endif
2624
2625 // ----------------------------------------------------------------------------
2626 // wxRichEditModule
2627 // ----------------------------------------------------------------------------
2628
2629 bool wxRichEditModule::OnInit()
2630 {
2631     // don't do anything - we will load it when needed
2632     return true;
2633 }
2634
2635 void wxRichEditModule::OnExit()
2636 {
2637     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2638     {
2639         if ( ms_hRichEdit[i] )
2640         {
2641             ::FreeLibrary(ms_hRichEdit[i]);
2642             ms_hRichEdit[i] = NULL;
2643         }
2644     }
2645 }
2646
2647 /* static */
2648 bool wxRichEditModule::Load(int version)
2649 {
2650     // we don't support loading richedit 3.0 as I don't know how to distinguish
2651     // it from 2.0 anyhow
2652     wxCHECK_MSG( version == 1 || version == 2, false,
2653                  _T("incorrect richedit control version requested") );
2654
2655     // make it the index in the array
2656     version--;
2657
2658     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
2659     {
2660         // we had already tried to load it and failed
2661         return false;
2662     }
2663
2664     if ( ms_hRichEdit[version] )
2665     {
2666         // we've already got this one
2667         return true;
2668     }
2669
2670     wxString dllname = version ? _T("riched20") : _T("riched32");
2671     dllname += _T(".dll");
2672
2673     ms_hRichEdit[version] = ::LoadLibrary(dllname);
2674
2675     if ( !ms_hRichEdit[version] )
2676     {
2677         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
2678
2679         ms_hRichEdit[version] = (HINSTANCE)-1;
2680
2681         return false;
2682     }
2683
2684     return true;
2685 }
2686
2687 #endif // wxUSE_RICHEDIT
2688
2689 #endif // wxUSE_TEXTCTRL && !(__SMARTPHONE__ && __WXWINCE__)