src/msw/textctrl.cpp

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