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 #endif
 181 }
 182
 183 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 184                         const wxString& value,
 185                         const wxPoint& pos,
 186                         const wxSize& size,
 187                         long style,
 188                         const wxValidator& validator,
 189                         const wxString& name)
 190 {
 191     // base initialization
 192     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 193         return FALSE;
 194
 195     if ( parent )
 196         parent->AddChild(this);
 197
 198     // translate wxWin style flags to MSW ones, checking for consistency while
 199     // doing it
 200     long msStyle = ES_LEFT | WS_TABSTOP;
 201
 202     if ( m_windowStyle & wxCLIP_SIBLINGS )
 203         msStyle |= WS_CLIPSIBLINGS;
 204
 205     if ( m_windowStyle & wxTE_MULTILINE )
 206     {
 207         wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
 208                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 209
 210         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 211         if ((m_windowStyle & wxTE_NO_VSCROLL) == 0)
 212             msStyle |= WS_VSCROLL;
 213         m_windowStyle |= wxTE_PROCESS_ENTER;
 214     }
 215     else // !multiline
 216     {
 217         // there is really no reason to not have this style for single line
 218         // text controls
 219         msStyle |= ES_AUTOHSCROLL;
 220     }
 221
 222     if ( m_windowStyle & wxHSCROLL )
 223         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 224
 225     if ( m_windowStyle & wxTE_READONLY )
 226         msStyle |= ES_READONLY;
 227
 228     if ( m_windowStyle & wxTE_PASSWORD )
 229         msStyle |= ES_PASSWORD;
 230
 231     if ( m_windowStyle & wxTE_AUTO_SCROLL )
 232         msStyle |= ES_AUTOHSCROLL;
 233
 234     if ( m_windowStyle & wxTE_NOHIDESEL )
 235         msStyle |= ES_NOHIDESEL;
 236
 237     // we always want the characters and the arrows
 238     m_lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
 239
 240     // we may have several different cases:
 241     // 1. normal case: both TAB and ENTER are used for dialog navigation
 242     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
 243     //    control in the dialog
 244     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
 245     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
 246     //    the next control
 247     if ( m_windowStyle & wxTE_PROCESS_ENTER )
 248         m_lDlgCode |= DLGC_WANTMESSAGE;
 249     if ( m_windowStyle & wxTE_PROCESS_TAB )
 250         m_lDlgCode |= DLGC_WANTTAB;
 251
 252     // do create the control - either an EDIT or RICHEDIT
 253     wxString windowClass = wxT("EDIT");
 254
 255 #if wxUSE_RICHEDIT
 256     if ( m_windowStyle & wxTE_AUTO_URL )
 257     {
 258         // automatic URL detection only works in RichEdit 2.0+
 259         m_windowStyle |= wxTE_RICH2;
 260     }
 261
 262     if ( m_windowStyle & wxTE_RICH2 )
 263     {
 264         // using richedit 2.0 implies using wxTE_RICH
 265         m_windowStyle |= wxTE_RICH;
 266     }
 267
 268     // we need to load the richedit DLL before creating the rich edit control
 269     if ( m_windowStyle & wxTE_RICH )
 270     {
 271         static bool s_errorGiven = FALSE;// MT-FIXME
 272
 273         // Which version do we need? Use 1.0 by default because it is much more
 274         // like the the standard EDIT or 2.0 if explicitly requested, but use
 275         // only 2.0 in Unicode mode as 1.0 doesn't support Unicode at all
 276         //
 277         // TODO: RichEdit 3.0 is apparently capable of emulating RichEdit 1.0
 278         //       (and thus EDIT) much better than RichEdit 2.0 so we probably
 279         //       should use 3.0 if available as it is the best of both worlds -
 280         //       but as I can't test it right now I don't do it (VZ)
 281 #if wxUSE_UNICODE
 282         const int verRichEdit = 2;
 283 #else // !wxUSE_UNICODE
 284         int verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 285 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 286
 287         // only give the error msg once if the DLL can't be loaded
 288         if ( !s_errorGiven )
 289         {
 290             // try to load the RichEdit DLL (will do nothing if already done)
 291             if ( !wxRichEditModule::Load(verRichEdit) )
 292             {
 293 #if !wxUSE_UNICODE
 294                 // try another version?
 295                 verRichEdit = 3 - verRichEdit; // 1 <-> 2
 296
 297                 if ( !wxRichEditModule::Load(verRichEdit) )
 298 #endif // wxUSE_UNICODE
 299                 {
 300                     wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 301
 302                     s_errorGiven = TRUE;
 303                 }
 304             }
 305         }
 306
 307         // have we managed to load any richedit version?
 308         if ( !s_errorGiven )
 309         {
 310             msStyle |= ES_AUTOVSCROLL;
 311
 312             m_verRichEdit = verRichEdit;
 313             if ( m_verRichEdit == 1 )
 314             {
 315                 windowClass = wxT("RICHEDIT");
 316             }
 317             else
 318             {
 319 #ifndef RICHEDIT_CLASS
 320                 wxString RICHEDIT_CLASS;
 321                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 322 #if wxUSE_UNICODE
 323                 RICHEDIT_CLASS += _T('W');
 324 #else // ANSI
 325                 RICHEDIT_CLASS += _T('A');
 326 #endif // Unicode/ANSI
 327 #endif // !RICHEDIT_CLASS
 328
 329                 windowClass = RICHEDIT_CLASS;
 330             }
 331         }
 332     }
 333 #endif // wxUSE_RICHEDIT
 334
 335     // we need to turn '\n's into "\r\n"s for the multiline controls
 336     wxString valueWin;
 337     if ( m_windowStyle & wxTE_MULTILINE )
 338     {
 339         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 340     }
 341     else // single line
 342     {
 343         valueWin = value;
 344     }
 345
 346     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 347         return FALSE;
 348
 349     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 350
 351 #if wxUSE_RICHEDIT
 352     if ( IsRich() )
 353     {
 354         // have to enable events manually
 355         LPARAM mask = ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE;
 356
 357         if ( m_windowStyle & wxTE_AUTO_URL )
 358         {
 359             mask |= ENM_LINK;
 360
 361             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 362         }
 363
 364         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 365     }
 366 #endif // wxUSE_RICHEDIT
 367
 368     return TRUE;
 369 }
 370
 371 // Make sure the window style (etc.) reflects the HWND style (roughly)
 372 void wxTextCtrl::AdoptAttributesFromHWND()
 373 {
 374     wxWindow::AdoptAttributesFromHWND();
 375
 376     HWND hWnd = GetHwnd();
 377     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 378
 379     // retrieve the style to see whether this is an edit or richedit ctrl
 380 #if wxUSE_RICHEDIT
 381     wxString classname = wxGetWindowClass(GetHWND());
 382
 383     if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
 384     {
 385         m_verRichEdit = 0;
 386     }
 387     else // rich edit?
 388     {
 389         wxChar c;
 390         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 391         {
 392             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 393
 394             m_verRichEdit = 0;
 395         }
 396     }
 397 #endif // wxUSE_RICHEDIT
 398
 399     if (style & ES_MULTILINE)
 400         m_windowStyle |= wxTE_MULTILINE;
 401     if (style & ES_PASSWORD)
 402         m_windowStyle |= wxTE_PASSWORD;
 403     if (style & ES_READONLY)
 404         m_windowStyle |= wxTE_READONLY;
 405     if (style & ES_WANTRETURN)
 406         m_windowStyle |= wxTE_PROCESS_ENTER;
 407 }
 408
 409 // ----------------------------------------------------------------------------
 410 // set/get the controls text
 411 // ----------------------------------------------------------------------------
 412
 413 wxString wxTextCtrl::GetValue() const
 414 {
 415     // range 0..-1 is special for GetRange() and means to retrieve all text
 416     return GetRange(0, -1);
 417 }
 418
 419 wxString wxTextCtrl::GetRange(long from, long to) const
 420 {
 421     wxString str;
 422
 423     if ( from >= to && to != -1 )
 424     {
 425         // nothing to retrieve
 426         return str;
 427     }
 428
 429 #if wxUSE_RICHEDIT
 430     if ( IsRich() )
 431     {
 432         int len = GetWindowTextLength(GetHwnd());
 433         if ( len > from )
 434         {
 435             // alloc one extra WORD as needed by the control
 436             wxChar *p = str.GetWriteBuf(++len);
 437
 438             TEXTRANGE textRange;
 439             textRange.chrg.cpMin = from;
 440             textRange.chrg.cpMax = to == -1 ? len : to;
 441             textRange.lpstrText = p;
 442
 443             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 444
 445             if ( m_verRichEdit > 1 )
 446             {
 447                 // RichEdit 2.0 uses just CR ('\r') for the newlines which is
 448                 // neither Unix nor Windows style - convert it to something
 449                 // reasonable
 450                 for ( ; *p; p++ )
 451                 {
 452                     if ( *p == _T('\r') )
 453                         *p = _T('\n');
 454                 }
 455             }
 456
 457             str.UngetWriteBuf();
 458
 459             if ( m_verRichEdit == 1 )
 460             {
 461                 // convert to the canonical form - see comment below
 462                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 463             }
 464         }
 465         //else: no text at all, leave the string empty
 466     }
 467     else
 468 #endif // wxUSE_RICHEDIT
 469     {
 470         // retrieve all text
 471         str = wxGetWindowText(GetHWND());
 472
 473         // need only a range?
 474         if ( from < to )
 475         {
 476             str = str.Mid(from, to - from);
 477         }
 478
 479         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 480         // canonical one (same one as above) for consistency with the other kinds
 481         // of controls and, more importantly, with the other ports
 482         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 483     }
 484
 485     return str;
 486 }
 487
 488 void wxTextCtrl::SetValue(const wxString& value)
 489 {
 490     // if the text is long enough, it's faster to just set it instead of first
 491     // comparing it with the old one (chances are that it will be different
 492     // anyhow, this comparison is there to avoid flicker for small single-line
 493     // edit controls mostly)
 494     if ( (value.length() > 0x400) || (value != GetValue()) )
 495     {
 496         DoWriteText(value, FALSE /* not selection only */);
 497
 498         // mark the control as being not dirty - we changed its text, not the
 499         // user
 500         DiscardEdits();
 501
 502         // for compatibility, don't move the cursor when doing SetValue()
 503         SetInsertionPoint(0);
 504     }
 505 }
 506
 507 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 508
 509 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 510 {
 511     *pcb = 0;
 512
 513     wchar_t *wbuf = (wchar_t *)buf;
 514     const wchar_t *wpc = *(const wchar_t **)dwCookie;
 515     while ( cb && *wpc )
 516     {
 517         *wbuf++ = *wpc++;
 518
 519         cb -= sizeof(wchar_t);
 520         (*pcb) += sizeof(wchar_t);
 521     }
 522
 523     *(const wchar_t **)dwCookie = wpc;
 524
 525     return 0;
 526 }
 527
 528 extern long wxEncodingToCodepage(wxFontEncoding encoding); // from strconv.cpp
 529
 530 #if wxUSE_UNICODE_MSLU
 531 bool wxTextCtrl::StreamIn(const wxString& value,
 532                           wxFontEncoding WXUNUSED(encoding),
 533                           bool selectionOnly)
 534 {
 535     const wchar_t *wpc = value.c_str();
 536 #else // !wxUSE_UNICODE_MSLU
 537 bool wxTextCtrl::StreamIn(const wxString& value,
 538                           wxFontEncoding encoding,
 539                           bool selectionOnly)
 540 {
 541     // we have to use EM_STREAMIN to force richedit control 2.0+ to show any
 542     // text in the non default charset - otherwise it thinks it knows better
 543     // than we do and always shows it in the default one
 544
 545     // first get the Windows code page for this encoding
 546     long codepage = wxEncodingToCodepage(encoding);
 547     if ( codepage == -1 )
 548     {
 549         // unknown encoding
 550         return FALSE;
 551     }
 552
 553     // next translate to Unicode using this code page
 554     int len = ::MultiByteToWideChar(codepage, 0, value, -1, NULL, 0);
 555     wxWCharBuffer wchBuf(len);
 556     if ( !::MultiByteToWideChar(codepage, 0, value, -1,
 557                                 (wchar_t *)wchBuf.data(), len) )
 558     {
 559         wxLogLastError(_T("MultiByteToWideChar"));
 560     }
 561
 562     // finally, stream it in the control
 563     const wchar_t *wpc = wchBuf;
 564 #endif // wxUSE_UNICODE_MSLU
 565
 566     EDITSTREAM eds;
 567     wxZeroMemory(eds);
 568     eds.dwCookie = (DWORD)&wpc;
 569     // the cast below is needed for broken (very) old mingw32 headers
 570     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 571
 572     if ( !::SendMessage(GetHwnd(), EM_STREAMIN,
 573                         SF_TEXT |
 574                         SF_UNICODE |
 575                         (selectionOnly ? SFF_SELECTION : 0),
 576                         (LPARAM)&eds) || eds.dwError )
 577     {
 578         wxLogLastError(_T("EM_STREAMIN"));
 579
 580         return FALSE;
 581     }
 582
 583     return TRUE;
 584 }
 585
 586 #endif // wxUSE_RICHEDIT
 587
 588 void wxTextCtrl::WriteText(const wxString& value)
 589 {
 590     DoWriteText(value);
 591 }
 592
 593 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 594 {
 595     wxString valueDos;
 596     if ( m_windowStyle & wxTE_MULTILINE )
 597         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 598     else
 599         valueDos = value;
 600
 601 #if wxUSE_RICHEDIT
 602     // there are several complications with the rich edit controls here
 603     bool done = FALSE;
 604     if ( IsRich() )
 605     {
 606         // first, ensure that the new text will be in the default style
 607         if ( !m_defaultStyle.IsDefault() )
 608         {
 609             long start, end;
 610             GetSelection(&start, &end);
 611             SetStyle(start, end, m_defaultStyle);
 612         }
 613
 614 #if wxUSE_UNICODE_MSLU
 615         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 616         // but EM_STREAMIN works
 617         if ( wxGetOsVersion() == wxWIN95 && GetRichVersion() > 1 )
 618         {
 619            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 620         }
 621 #endif // wxUSE_UNICODE_MSLU
 622
 623 #if !wxUSE_UNICODE
 624         // next check if the text we're inserting must be shown in a non
 625         // default charset -- this only works for RichEdit > 1.0
 626         if ( GetRichVersion() > 1 )
 627         {
 628             wxFont font = m_defaultStyle.GetFont();
 629             if ( !font.Ok() )
 630                 font = GetFont();
 631
 632             if ( font.Ok() )
 633             {
 634                wxFontEncoding encoding = font.GetEncoding();
 635                if ( encoding != wxFONTENCODING_SYSTEM )
 636                {
 637                    done = StreamIn(valueDos, encoding, selectionOnly);
 638                }
 639             }
 640         }
 641 #endif // !wxUSE_UNICODE
 642     }
 643
 644     if ( !done )
 645 #endif // wxUSE_RICHEDIT
 646     {
 647         if ( !selectionOnly )
 648         {
 649             SetSelection(-1, -1);
 650         }
 651
 652         ::SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
 653     }
 654
 655     AdjustSpaceLimit();
 656 }
 657
 658 void wxTextCtrl::AppendText(const wxString& text)
 659 {
 660     SetInsertionPointEnd();
 661
 662     WriteText(text);
 663 }
 664
 665 void wxTextCtrl::Clear()
 666 {
 667     ::SetWindowText(GetHwnd(), wxT(""));
 668 }
 669
 670 // ----------------------------------------------------------------------------
 671 // Clipboard operations
 672 // ----------------------------------------------------------------------------
 673
 674 void wxTextCtrl::Copy()
 675 {
 676     if (CanCopy())
 677     {
 678         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
 679     }
 680 }
 681
 682 void wxTextCtrl::Cut()
 683 {
 684     if (CanCut())
 685     {
 686         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
 687     }
 688 }
 689
 690 void wxTextCtrl::Paste()
 691 {
 692     if (CanPaste())
 693     {
 694         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
 695     }
 696 }
 697
 698 bool wxTextCtrl::CanCopy() const
 699 {
 700     // Can copy if there's a selection
 701     long from, to;
 702     GetSelection(&from, &to);
 703     return from != to;
 704 }
 705
 706 bool wxTextCtrl::CanCut() const
 707 {
 708     return CanCopy() && IsEditable();
 709 }
 710
 711 bool wxTextCtrl::CanPaste() const
 712 {
 713     if ( !IsEditable() )
 714         return FALSE;
 715
 716 #if wxUSE_RICHEDIT
 717     if ( IsRich() )
 718     {
 719         UINT cf = 0; // 0 == any format
 720
 721         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
 722     }
 723 #endif // wxUSE_RICHEDIT
 724
 725     // Standard edit control: check for straight text on clipboard
 726     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 727         return FALSE;
 728
 729     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
 730     ::CloseClipboard();
 731
 732     return isTextAvailable;
 733 }
 734
 735 // ----------------------------------------------------------------------------
 736 // Accessors
 737 // ----------------------------------------------------------------------------
 738
 739 void wxTextCtrl::SetEditable(bool editable)
 740 {
 741     HWND hWnd = GetHwnd();
 742     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 743 }
 744
 745 void wxTextCtrl::SetInsertionPoint(long pos)
 746 {
 747     DoSetSelection(pos, pos);
 748 }
 749
 750 void wxTextCtrl::SetInsertionPointEnd()
 751 {
 752     long pos;
 753
 754 #if wxUSE_RICHEDIT
 755     if ( m_verRichEdit == 1 )
 756     {
 757         // we don't have to waste time calling GetLastPosition() in this case
 758         pos = -1;
 759     }
 760     else // !RichEdit 1.0
 761 #endif // wxUSE_RICHEDIT
 762     {
 763         pos = GetLastPosition();
 764     }
 765
 766     SetInsertionPoint(pos);
 767 }
 768
 769 long wxTextCtrl::GetInsertionPoint() const
 770 {
 771 #if wxUSE_RICHEDIT
 772     if ( IsRich() )
 773     {
 774         CHARRANGE range;
 775         range.cpMin = 0;
 776         range.cpMax = 0;
 777         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 778         return range.cpMin;
 779     }
 780 #endif // wxUSE_RICHEDIT
 781
 782     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 783     return Pos & 0xFFFF;
 784 }
 785
 786 long wxTextCtrl::GetLastPosition() const
 787 {
 788     int numLines = GetNumberOfLines();
 789     long posStartLastLine = XYToPosition(0, numLines - 1);
 790
 791     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
 792
 793     return posStartLastLine + lenLastLine;
 794 }
 795
 796 // If the return values from and to are the same, there is no
 797 // selection.
 798 void wxTextCtrl::GetSelection(long* from, long* to) const
 799 {
 800 #if wxUSE_RICHEDIT
 801     if ( IsRich() )
 802     {
 803         CHARRANGE charRange;
 804         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
 805
 806         *from = charRange.cpMin;
 807         *to = charRange.cpMax;
 808     }
 809     else
 810 #endif // !wxUSE_RICHEDIT
 811     {
 812         DWORD dwStart, dwEnd;
 813         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
 814
 815         *from = dwStart;
 816         *to = dwEnd;
 817     }
 818 }
 819
 820 bool wxTextCtrl::IsEditable() const
 821 {
 822     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 823
 824     return (style & ES_READONLY) == 0;
 825 }
 826
 827 // ----------------------------------------------------------------------------
 828 // selection
 829 // ----------------------------------------------------------------------------
 830
 831 void wxTextCtrl::SetSelection(long from, long to)
 832 {
 833     // if from and to are both -1, it means (in wxWindows) that all text should
 834     // be selected - translate into Windows convention
 835     if ( (from == -1) && (to == -1) )
 836     {
 837         from = 0;
 838         to = -1;
 839     }
 840
 841     DoSetSelection(from, to);
 842 }
 843
 844 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
 845 {
 846     HWND hWnd = GetHwnd();
 847
 848 #ifdef __WIN32__
 849 #if wxUSE_RICHEDIT
 850     if ( IsRich() )
 851     {
 852         CHARRANGE range;
 853         range.cpMin = from;
 854         range.cpMax = to;
 855         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 856     }
 857     else
 858 #endif // wxUSE_RICHEDIT
 859     {
 860         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
 861     }
 862
 863     if ( scrollCaret )
 864     {
 865         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 866     }
 867 #else // Win16
 868     // WPARAM is 0: selection is scrolled into view
 869     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
 870 #endif // Win32/16
 871 }
 872
 873 // ----------------------------------------------------------------------------
 874 // Editing
 875 // ----------------------------------------------------------------------------
 876
 877 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 878 {
 879     // Set selection and remove it
 880     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
 881
 882     SendMessage(GetHwnd(), EM_REPLACESEL,
 883 #ifdef __WIN32__
 884                 TRUE,
 885 #else
 886                 FALSE,
 887 #endif
 888                 (LPARAM)value.c_str());
 889 }
 890
 891 void wxTextCtrl::Remove(long from, long to)
 892 {
 893     Replace(from, to, _T(""));
 894 }
 895
 896 bool wxTextCtrl::LoadFile(const wxString& file)
 897 {
 898     if ( wxTextCtrlBase::LoadFile(file) )
 899     {
 900         // update the size limit if needed
 901         AdjustSpaceLimit();
 902
 903         return TRUE;
 904     }
 905
 906     return FALSE;
 907 }
 908
 909 bool wxTextCtrl::IsModified() const
 910 {
 911     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
 912 }
 913
 914 // Makes 'unmodified'
 915 void wxTextCtrl::DiscardEdits()
 916 {
 917     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 918 }
 919
 920 int wxTextCtrl::GetNumberOfLines() const
 921 {
 922     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 923 }
 924
 925 long wxTextCtrl::XYToPosition(long x, long y) const
 926 {
 927     // This gets the char index for the _beginning_ of this line
 928     long charIndex = SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 929
 930     return charIndex + x;
 931 }
 932
 933 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 934 {
 935     HWND hWnd = GetHwnd();
 936
 937     // This gets the line number containing the character
 938     long lineNo;
 939 #if wxUSE_RICHEDIT
 940     if ( IsRich() )
 941     {
 942         lineNo = SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
 943     }
 944     else
 945 #endif // wxUSE_RICHEDIT
 946     {
 947         lineNo = SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
 948     }
 949
 950     if ( lineNo == -1 )
 951     {
 952         // no such line
 953         return FALSE;
 954     }
 955
 956     // This gets the char index for the _beginning_ of this line
 957     long charIndex = SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 958     if ( charIndex == -1 )
 959     {
 960         return FALSE;
 961     }
 962
 963     // The X position must therefore be the different between pos and charIndex
 964     if ( x )
 965         *x = pos - charIndex;
 966     if ( y )
 967         *y = lineNo;
 968
 969     return TRUE;
 970 }
 971
 972 void wxTextCtrl::ShowPosition(long pos)
 973 {
 974     HWND hWnd = GetHwnd();
 975
 976     // To scroll to a position, we pass the number of lines and characters
 977     // to scroll *by*. This means that we need to:
 978     // (1) Find the line position of the current line.
 979     // (2) Find the line position of pos.
 980     // (3) Scroll by (pos - current).
 981     // For now, ignore the horizontal scrolling.
 982
 983     // Is this where scrolling is relative to - the line containing the caret?
 984     // Or is the first visible line??? Try first visible line.
 985 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 986
 987     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 988
 989     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 990
 991     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 992
 993     if (linesToScroll != 0)
 994       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 995 }
 996
 997 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
 998 {
 999     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1000 }
1001
1002 int wxTextCtrl::GetLineLength(long lineNo) const
1003 {
1004     long pos = XYToPosition(0, lineNo);
1005
1006     return GetLengthOfLineContainingPos(pos);
1007 }
1008
1009 wxString wxTextCtrl::GetLineText(long lineNo) const
1010 {
1011     size_t len = (size_t)GetLineLength(lineNo) + 1;
1012
1013     // there must be at least enough place for the length WORD in the
1014     // buffer
1015     len += sizeof(WORD);
1016
1017     wxString str;
1018     wxChar *buf = str.GetWriteBuf(len);
1019
1020     *(WORD *)buf = (WORD)len;
1021     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1022     buf[len] = 0;
1023
1024     str.UngetWriteBuf(len);
1025
1026     return str;
1027 }
1028
1029 void wxTextCtrl::SetMaxLength(unsigned long len)
1030 {
1031     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1032 }
1033
1034 // ----------------------------------------------------------------------------
1035 // Undo/redo
1036 // ----------------------------------------------------------------------------
1037
1038 void wxTextCtrl::Undo()
1039 {
1040     if (CanUndo())
1041     {
1042         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1043     }
1044 }
1045
1046 void wxTextCtrl::Redo()
1047 {
1048     if (CanRedo())
1049     {
1050         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1051         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1052     }
1053 }
1054
1055 bool wxTextCtrl::CanUndo() const
1056 {
1057     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1058 }
1059
1060 bool wxTextCtrl::CanRedo() const
1061 {
1062     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1063 }
1064
1065 // ----------------------------------------------------------------------------
1066 // implemenation details
1067 // ----------------------------------------------------------------------------
1068
1069 void wxTextCtrl::Command(wxCommandEvent & event)
1070 {
1071     SetValue(event.GetString());
1072     ProcessCommand (event);
1073 }
1074
1075 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1076 {
1077     // By default, load the first file into the text window.
1078     if (event.GetNumberOfFiles() > 0)
1079     {
1080         LoadFile(event.GetFiles()[0]);
1081     }
1082 }
1083
1084 // ----------------------------------------------------------------------------
1085 // kbd input processing
1086 // ----------------------------------------------------------------------------
1087
1088 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1089 {
1090     MSG *msg = (MSG *)pMsg;
1091
1092     // check for our special keys here: if we don't do it and the parent frame
1093     // uses them as accelerators, they wouldn't work at all, so we disable
1094     // usual preprocessing for them
1095     if ( msg->message == WM_KEYDOWN )
1096     {
1097         WORD vkey = msg->wParam;
1098         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1099         {
1100             if ( vkey == VK_BACK )
1101                 return FALSE;
1102         }
1103         else // no Alt
1104         {
1105             if ( wxIsCtrlDown() )
1106             {
1107                 switch ( vkey )
1108                 {
1109                     case 'C':
1110                     case 'V':
1111                     case 'X':
1112                     case VK_INSERT:
1113                     case VK_DELETE:
1114                     case VK_HOME:
1115                     case VK_END:
1116                         return FALSE;
1117                 }
1118             }
1119             else if ( wxIsShiftDown() )
1120             {
1121                 if ( vkey == VK_INSERT || vkey == VK_DELETE )
1122                     return FALSE;
1123             }
1124         }
1125     }
1126
1127     return wxControl::MSWShouldPreProcessMessage(pMsg);
1128 }
1129
1130 void wxTextCtrl::OnChar(wxKeyEvent& event)
1131 {
1132     switch ( event.KeyCode() )
1133     {
1134         case WXK_RETURN:
1135             if ( !(m_windowStyle & wxTE_MULTILINE) )
1136             {
1137                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1138                 InitCommandEvent(event);
1139                 event.SetString(GetValue());
1140                 if ( GetEventHandler()->ProcessEvent(event) )
1141                     return;
1142             }
1143             //else: multiline controls need Enter for themselves
1144
1145             break;
1146
1147         case WXK_TAB:
1148             // always produce navigation event - even if we process TAB
1149             // ourselves the fact that we got here means that the user code
1150             // decided to skip processing of this TAB - probably to let it
1151             // do its default job.
1152             {
1153                 wxNavigationKeyEvent eventNav;
1154                 eventNav.SetDirection(!event.ShiftDown());
1155                 eventNav.SetWindowChange(event.ControlDown());
1156                 eventNav.SetEventObject(this);
1157
1158                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1159                     return;
1160             }
1161             break;
1162     }
1163
1164     // no, we didn't process it
1165     event.Skip();
1166 }
1167
1168 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1169 {
1170     switch (param)
1171     {
1172         case EN_SETFOCUS:
1173         case EN_KILLFOCUS:
1174             {
1175                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1176                                                          : wxEVT_SET_FOCUS,
1177                                    m_windowId);
1178                 event.SetEventObject( this );
1179                 GetEventHandler()->ProcessEvent(event);
1180             }
1181             break;
1182
1183         case EN_CHANGE:
1184             {
1185                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1186                 InitCommandEvent(event);
1187                 event.SetString(GetValue());
1188                 ProcessCommand(event);
1189             }
1190             break;
1191
1192         case EN_MAXTEXT:
1193             // the text size limit has been hit - increase it
1194             if ( !AdjustSpaceLimit() )
1195             {
1196                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1197                 InitCommandEvent(event);
1198                 event.SetString(GetValue());
1199                 ProcessCommand(event);
1200             }
1201             break;
1202
1203             // the other notification messages are not processed
1204         case EN_UPDATE:
1205         case EN_ERRSPACE:
1206         case EN_HSCROLL:
1207         case EN_VSCROLL:
1208             return FALSE;
1209         default:
1210             return FALSE;
1211     }
1212
1213     // processed
1214     return TRUE;
1215 }
1216
1217 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1218 #if wxUSE_CTL3D
1219                                WXUINT message,
1220                                WXWPARAM wParam,
1221                                WXLPARAM lParam
1222 #else
1223                                WXUINT WXUNUSED(message),
1224                                WXWPARAM WXUNUSED(wParam),
1225                                WXLPARAM WXUNUSED(lParam)
1226 #endif
1227     )
1228 {
1229 #if wxUSE_CTL3D
1230     if ( m_useCtl3D )
1231     {
1232         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1233         return (WXHBRUSH) hbrush;
1234     }
1235 #endif // wxUSE_CTL3D
1236
1237     HDC hdc = (HDC)pDC;
1238     if (GetParent()->GetTransparentBackground())
1239         SetBkMode(hdc, TRANSPARENT);
1240     else
1241         SetBkMode(hdc, OPAQUE);
1242
1243     wxColour colBack = GetBackgroundColour();
1244
1245     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1246         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1247
1248     ::SetBkColor(hdc, wxColourToRGB(colBack));
1249     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1250
1251     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1252
1253     return (WXHBRUSH)brush->GetResourceHandle();
1254 }
1255
1256 // In WIN16, need to override normal erasing because
1257 // Ctl3D doesn't use the wxWindows background colour.
1258 #ifdef __WIN16__
1259 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1260 {
1261     wxColour col(m_backgroundColour);
1262
1263 #if wxUSE_CTL3D
1264     if (m_useCtl3D)
1265         col = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1266 #endif
1267
1268     RECT rect;
1269     ::GetClientRect(GetHwnd(), &rect);
1270
1271     COLORREF ref = wxColourToRGB(col);
1272     HBRUSH hBrush = ::CreateSolidBrush(ref);
1273     if ( !hBrush )
1274         wxLogLastError(wxT("CreateSolidBrush"));
1275
1276     HDC hdc = (HDC)event.GetDC()->GetHDC();
1277
1278     int mode = ::SetMapMode(hdc, MM_TEXT);
1279
1280     ::FillRect(hdc, &rect, hBrush);
1281     ::DeleteObject(hBrush);
1282     ::SetMapMode(hdc, mode);
1283
1284 }
1285 #endif // Win16
1286
1287 bool wxTextCtrl::AdjustSpaceLimit()
1288 {
1289 #ifndef __WIN16__
1290     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1291
1292     // HACK: we try to automatically extend the limit for the amount of text
1293     //       to allow (interactively) entering more than 64Kb of text under
1294     //       Win9x but we shouldn't reset the text limit which was previously
1295     //       set explicitly with SetMaxLength()
1296     //
1297     //       we could solve this by storing the limit we set in wxTextCtrl but
1298     //       to save space we prefer to simply test here the actual limit
1299     //       value: we consider that SetMaxLength() can only be called for
1300     //       values < 32Kb
1301     if ( limit < 0x8000 )
1302     {
1303         // we've got more text than limit set by SetMaxLength()
1304         return FALSE;
1305     }
1306
1307     unsigned int len = ::GetWindowTextLength(GetHwnd());
1308     if ( len >= limit )
1309     {
1310         limit = len + 0x8000;    // 32Kb
1311
1312 #if wxUSE_RICHEDIT
1313         if ( IsRich() )
1314         {
1315             // as a nice side effect, this also allows passing limit > 64Kb
1316             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1317         }
1318         else
1319 #endif // wxUSE_RICHEDIT
1320         {
1321             if ( limit > 0xffff )
1322             {
1323                 // this will set it to a platform-dependent maximum (much more
1324                 // than 64Kb under NT)
1325                 limit = 0;
1326             }
1327
1328             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1329         }
1330     }
1331 #endif // !Win16
1332
1333     // we changed the limit
1334     return TRUE;
1335 }
1336
1337 bool wxTextCtrl::AcceptsFocus() const
1338 {
1339     // we don't want focus if we can't be edited
1340     return IsEditable() && wxControl::AcceptsFocus();
1341 }
1342
1343 wxSize wxTextCtrl::DoGetBestSize() const
1344 {
1345     int cx, cy;
1346     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1347
1348     int wText = DEFAULT_ITEM_WIDTH;
1349
1350     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1351     if ( m_windowStyle & wxTE_MULTILINE )
1352     {
1353         hText *= wxMax(GetNumberOfLines(), 5);
1354     }
1355     //else: for single line control everything is ok
1356
1357     return wxSize(wText, hText);
1358 }
1359
1360 // ----------------------------------------------------------------------------
1361 // standard handlers for standard edit menu events
1362 // ----------------------------------------------------------------------------
1363
1364 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1365 {
1366     Cut();
1367 }
1368
1369 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1370 {
1371     Copy();
1372 }
1373
1374 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1375 {
1376     Paste();
1377 }
1378
1379 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1380 {
1381     Undo();
1382 }
1383
1384 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1385 {
1386     Redo();
1387 }
1388
1389 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1390 {
1391     event.Enable( CanCut() );
1392 }
1393
1394 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1395 {
1396     event.Enable( CanCopy() );
1397 }
1398
1399 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1400 {
1401     event.Enable( CanPaste() );
1402 }
1403
1404 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1405 {
1406     event.Enable( CanUndo() );
1407 }
1408
1409 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1410 {
1411     event.Enable( CanRedo() );
1412 }
1413
1414 // the rest of the file only deals with the rich edit controls
1415 #if wxUSE_RICHEDIT
1416
1417 // ----------------------------------------------------------------------------
1418 // EN_LINK processing
1419 // ----------------------------------------------------------------------------
1420
1421 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1422 {
1423     NMHDR *hdr = (NMHDR* )lParam;
1424     if ( hdr->code == EN_LINK )
1425     {
1426         ENLINK *enlink = (ENLINK *)hdr;
1427
1428         switch ( enlink->msg )
1429         {
1430             case WM_SETCURSOR:
1431                 // ok, so it is hardcoded - do we really nee to customize it?
1432                 ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1433                 *result = TRUE;
1434                 break;
1435
1436             case WM_MOUSEMOVE:
1437             case WM_LBUTTONDOWN:
1438             case WM_LBUTTONUP:
1439             case WM_LBUTTONDBLCLK:
1440             case WM_RBUTTONDOWN:
1441             case WM_RBUTTONUP:
1442             case WM_RBUTTONDBLCLK:
1443                 // send a mouse event
1444                 {
1445                     static const wxEventType eventsMouse[] =
1446                     {
1447                         wxEVT_MOTION,
1448                         wxEVT_LEFT_DOWN,
1449                         wxEVT_LEFT_UP,
1450                         wxEVT_LEFT_DCLICK,
1451                         wxEVT_RIGHT_DOWN,
1452                         wxEVT_RIGHT_UP,
1453                         wxEVT_RIGHT_DCLICK,
1454                     };
1455
1456                     // the event ids are consecutive
1457                     wxMouseEvent
1458                         evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1459
1460                     InitMouseEvent(evtMouse,
1461                                    GET_X_LPARAM(enlink->lParam),
1462                                    GET_Y_LPARAM(enlink->lParam),
1463                                    enlink->wParam);
1464
1465                     wxTextUrlEvent event(m_windowId, evtMouse,
1466                                          enlink->chrg.cpMin,
1467                                          enlink->chrg.cpMax);
1468
1469                     InitCommandEvent(event);
1470
1471                     *result = ProcessCommand(event);
1472                 }
1473                 break;
1474         }
1475
1476         return TRUE;
1477     }
1478
1479     // not processed
1480     return FALSE;
1481 }
1482
1483 // ----------------------------------------------------------------------------
1484 // colour setting for the rich edit controls
1485 // ----------------------------------------------------------------------------
1486
1487 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1488 {
1489     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1490     {
1491         // colour didn't really change
1492         return FALSE;
1493     }
1494
1495     if ( IsRich() )
1496     {
1497         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1498         // EM_SETBKGNDCOLOR additionally
1499         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1500     }
1501
1502     return TRUE;
1503 }
1504
1505 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1506 {
1507     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1508     {
1509         // colour didn't really change
1510         return FALSE;
1511     }
1512
1513     if ( IsRich() )
1514     {
1515         // change the colour of everything
1516         CHARFORMAT cf;
1517         wxZeroMemory(cf);
1518         cf.cbSize = sizeof(cf);
1519         cf.dwMask = CFM_COLOR;
1520         cf.crTextColor = wxColourToRGB(colour);
1521         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1522     }
1523
1524     return TRUE;
1525 }
1526
1527 // ----------------------------------------------------------------------------
1528 // styling support for rich edit controls
1529 // ----------------------------------------------------------------------------
1530
1531 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1532 {
1533     if ( !IsRich() )
1534     {
1535         // can't do it with normal text control
1536         return FALSE;
1537     }
1538
1539     // the richedit 1.0 doesn't handle setting background colour, so don't
1540     // even try to do anything if it's the only thing we want to change
1541     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() )
1542     {
1543         // nothing to do: return TRUE if there was really nothing to do and
1544         // FALSE if we failed to set bg colour
1545         return !style.HasBackgroundColour();
1546     }
1547
1548     // order the range if needed
1549     if ( start > end )
1550     {
1551         long tmp = start;
1552         start = end;
1553         end = tmp;
1554     }
1555
1556     // we can only change the format of the selection, so select the range we
1557     // want and restore the old selection later
1558     long startOld, endOld;
1559     GetSelection(&startOld, &endOld);
1560
1561     // but do we really have to change the selection?
1562     bool changeSel = start != startOld || end != endOld;
1563
1564     if ( changeSel )
1565     {
1566         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
1567     }
1568
1569     // initialize CHARFORMAT struct
1570 #if wxUSE_RICHEDIT2
1571     CHARFORMAT2 cf;
1572 #else
1573     CHARFORMAT cf;
1574 #endif
1575
1576     wxZeroMemory(cf);
1577
1578     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
1579     // CHARFORMAT in that case
1580 #if wxUSE_RICHEDIT2
1581     if ( m_verRichEdit == 1 )
1582     {
1583         // this is the only thing the control is going to grok
1584         cf.cbSize = sizeof(CHARFORMAT);
1585     }
1586     else
1587 #endif
1588     {
1589         // CHARFORMAT or CHARFORMAT2
1590         cf.cbSize = sizeof(cf);
1591     }
1592
1593     if ( style.HasFont() )
1594     {
1595         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
1596         //     but using it doesn't seem to hurt neither so leaving it for now
1597
1598         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1599                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1600
1601         // fill in data from LOGFONT but recalculate lfHeight because we need
1602         // the real height in twips and not the negative number which
1603         // wxFillLogFont() returns (this is correct in general and works with
1604         // the Windows font mapper, but not here)
1605         LOGFONT lf;
1606         wxFillLogFont(&lf, &style.GetFont());
1607         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1608         cf.bCharSet = lf.lfCharSet;
1609         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1610         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1611
1612         // also deal with underline/italic/bold attributes: note that we must
1613         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1614         // style to allow clearing it
1615         if ( lf.lfItalic )
1616         {
1617             cf.dwEffects |= CFE_ITALIC;
1618         }
1619
1620         if ( lf.lfWeight == FW_BOLD )
1621         {
1622             cf.dwEffects |= CFE_BOLD;
1623         }
1624
1625         if ( lf.lfUnderline )
1626         {
1627             cf.dwEffects |= CFE_UNDERLINE;
1628         }
1629
1630         // strikeout fonts are not supported by wxWindows
1631     }
1632
1633     if ( style.HasTextColour() )
1634     {
1635         cf.dwMask |= CFM_COLOR;
1636         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1637     }
1638
1639 #if wxUSE_RICHEDIT2
1640     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
1641     {
1642         cf.dwMask |= CFM_BACKCOLOR;
1643         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1644     }
1645 #endif // wxUSE_RICHEDIT2
1646
1647     // do format the selection
1648     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1649                             SCF_SELECTION, (LPARAM)&cf) != 0;
1650     if ( !ok )
1651     {
1652         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1653     }
1654
1655     if ( changeSel )
1656     {
1657         // restore the original selection
1658         DoSetSelection(startOld, endOld, FALSE);
1659     }
1660
1661     return ok;
1662 }
1663
1664 // ----------------------------------------------------------------------------
1665 // wxRichEditModule
1666 // ----------------------------------------------------------------------------
1667
1668 bool wxRichEditModule::OnInit()
1669 {
1670     // don't do anything - we will load it when needed
1671     return TRUE;
1672 }
1673
1674 void wxRichEditModule::OnExit()
1675 {
1676     for ( int i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
1677     {
1678         if ( ms_hRichEdit[i] )
1679         {
1680             ::FreeLibrary(ms_hRichEdit[i]);
1681         }
1682     }
1683 }
1684
1685 /* static */
1686 bool wxRichEditModule::Load(int version)
1687 {
1688     // we don't support loading richedit 3.0 as I don't know how to distinguish
1689     // it from 2.0 anyhow
1690     wxCHECK_MSG( version == 1 || version == 2, FALSE,
1691                  _T("incorrect richedit control version requested") );
1692
1693     // make it the index in the array
1694     version--;
1695
1696     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
1697     {
1698         // we had already tried to load it and failed
1699         return FALSE;
1700     }
1701
1702     if ( ms_hRichEdit[version] )
1703     {
1704         // we've already got this one
1705         return TRUE;
1706     }
1707
1708     wxString dllname = version ? _T("riched20") : _T("riched32");
1709     dllname += _T(".dll");
1710
1711     ms_hRichEdit[version] = ::LoadLibrary(dllname);
1712
1713     if ( !ms_hRichEdit[version] )
1714     {
1715         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1716
1717         ms_hRichEdit[version] = (HINSTANCE)-1;
1718
1719         return FALSE;
1720     }
1721
1722     return TRUE;
1723 }
1724
1725 #endif // wxUSE_RICHEDIT
1726
1727 #endif // wxUSE_TEXTCTRL