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 // ----------------------------------------------------------------------------
  99 // private functions
 100 // ----------------------------------------------------------------------------
 101
 102 #if wxUSE_RICHEDIT
 103
 104 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb);
 105
 106 #endif // wxUSE_RICHEDIT
 107
 108 // ----------------------------------------------------------------------------
 109 // private classes
 110 // ----------------------------------------------------------------------------
 111
 112 #if wxUSE_RICHEDIT
 113
 114 // this module initializes RichEdit DLL if needed
 115 class wxRichEditModule : public wxModule
 116 {
 117 public:
 118     virtual bool OnInit();
 119     virtual void OnExit();
 120
 121     // get the version currently loaded, -1 if none
 122     static int GetLoadedVersion() { return ms_verRichEdit; }
 123
 124     // load the richedit DLL of at least of required version
 125     static bool Load(int version = 1);
 126
 127 private:
 128     // the handle to richedit DLL and the version of the DLL loaded
 129     static HINSTANCE ms_hRichEdit;
 130
 131     // the DLL version loaded or -1 if none
 132     static int ms_verRichEdit;
 133
 134     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
 135 };
 136
 137 HINSTANCE wxRichEditModule::ms_hRichEdit = (HINSTANCE)NULL;
 138 int       wxRichEditModule::ms_verRichEdit = -1;
 139
 140 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 141
 142 #endif // wxUSE_RICHEDIT
 143
 144 // ----------------------------------------------------------------------------
 145 // event tables and other macros
 146 // ----------------------------------------------------------------------------
 147
 148 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 149
 150 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 151     EVT_CHAR(wxTextCtrl::OnChar)
 152     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 153
 154     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 155     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 156     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 157     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 158     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 159
 160     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 161     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 162     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 163     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 164     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 165 #ifdef __WIN16__
 166     EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
 167 #endif
 168 END_EVENT_TABLE()
 169
 170 // ============================================================================
 171 // implementation
 172 // ============================================================================
 173
 174 // ----------------------------------------------------------------------------
 175 // creation
 176 // ----------------------------------------------------------------------------
 177
 178 void wxTextCtrl::Init()
 179 {
 180 #if wxUSE_RICHEDIT
 181     m_verRichEdit = 0;
 182 #endif
 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, checking for consistency while
 201     // doing it
 202     long msStyle = ES_LEFT | WS_TABSTOP;
 203
 204     if ( m_windowStyle & wxCLIP_SIBLINGS )
 205         msStyle |= WS_CLIPSIBLINGS;
 206
 207     if ( m_windowStyle & wxTE_MULTILINE )
 208     {
 209         wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
 210                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 211
 212         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 213         if ((m_windowStyle & wxTE_NO_VSCROLL) == 0)
 214             msStyle |= WS_VSCROLL;
 215         m_windowStyle |= wxTE_PROCESS_ENTER;
 216     }
 217     else // !multiline
 218     {
 219         // there is really no reason to not have this style for single line
 220         // text controls
 221         msStyle |= ES_AUTOHSCROLL;
 222     }
 223
 224     if ( m_windowStyle & wxHSCROLL )
 225         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 226
 227     if ( m_windowStyle & wxTE_READONLY )
 228         msStyle |= ES_READONLY;
 229
 230     if ( m_windowStyle & wxTE_PASSWORD )
 231         msStyle |= ES_PASSWORD;
 232
 233     if ( m_windowStyle & wxTE_AUTO_SCROLL )
 234         msStyle |= ES_AUTOHSCROLL;
 235
 236     if ( m_windowStyle & wxTE_NOHIDESEL )
 237         msStyle |= ES_NOHIDESEL;
 238
 239     // we always want the characters and the arrows
 240     m_lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
 241
 242     // we may have several different cases:
 243     // 1. normal case: both TAB and ENTER are used for dialog navigation
 244     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
 245     //    control in the dialog
 246     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
 247     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
 248     //    the next control
 249     if ( m_windowStyle & wxTE_PROCESS_ENTER )
 250         m_lDlgCode |= DLGC_WANTMESSAGE;
 251     if ( m_windowStyle & wxTE_PROCESS_TAB )
 252         m_lDlgCode |= DLGC_WANTTAB;
 253
 254     // do create the control - either an EDIT or RICHEDIT
 255     wxString windowClass = wxT("EDIT");
 256
 257 #if wxUSE_RICHEDIT
 258     if ( m_windowStyle & wxTE_RICH )
 259     {
 260         static bool s_errorGiven = FALSE;   // MT-FIXME
 261
 262         // only give the error msg once if the DLL can't be loaded
 263         if ( !s_errorGiven )
 264         {
 265             // first try to load the RichEdit DLL (will do nothing if already
 266             // done)
 267             if ( !wxRichEditModule::Load() )
 268             {
 269                 wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 270
 271                 s_errorGiven = TRUE;
 272             }
 273         }
 274
 275         if ( !s_errorGiven )
 276         {
 277             msStyle |= ES_AUTOVSCROLL;
 278
 279             m_verRichEdit = wxRichEditModule::GetLoadedVersion();
 280             if ( m_verRichEdit == 1 )
 281             {
 282                 windowClass = wxT("RICHEDIT");
 283             }
 284             else
 285             {
 286 #ifndef RICHEDIT_CLASS
 287                 wxString RICHEDIT_CLASS;
 288                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 289 #if wxUSE_UNICODE
 290                 RICHEDIT_CLASS += _T('W');
 291 #else // ANSI
 292                 RICHEDIT_CLASS += _T('A');
 293 #endif // Unicode/ANSI
 294 #endif // !RICHEDIT_CLASS
 295
 296                 windowClass = RICHEDIT_CLASS;
 297             }
 298         }
 299     }
 300 #endif // wxUSE_RICHEDIT
 301
 302     // we need to turn '\n's into "\r\n"s for the multiline controls
 303     wxString valueWin;
 304     if ( m_windowStyle & wxTE_MULTILINE )
 305     {
 306         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 307     }
 308     else // single line
 309     {
 310         valueWin = value;
 311     }
 312
 313     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 314         return FALSE;
 315
 316     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 317
 318 #if wxUSE_RICHEDIT
 319     if ( IsRich() )
 320     {
 321         // have to enable events manually
 322         LPARAM mask = ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE;
 323
 324         if ( m_windowStyle & wxTE_AUTO_URL )
 325         {
 326             mask |= ENM_LINK;
 327
 328             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 329         }
 330
 331         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 332     }
 333 #endif // wxUSE_RICHEDIT
 334
 335     return TRUE;
 336 }
 337
 338 // Make sure the window style (etc.) reflects the HWND style (roughly)
 339 void wxTextCtrl::AdoptAttributesFromHWND()
 340 {
 341     wxWindow::AdoptAttributesFromHWND();
 342
 343     HWND hWnd = GetHwnd();
 344     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 345
 346     // retrieve the style to see whether this is an edit or richedit ctrl
 347 #if wxUSE_RICHEDIT
 348     wxString classname = wxGetWindowClass(GetHWND());
 349
 350     if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
 351     {
 352         m_verRichEdit = 0;
 353     }
 354     else // rich edit?
 355     {
 356         wxChar c;
 357         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 358         {
 359             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 360
 361             m_verRichEdit = 0;
 362         }
 363     }
 364 #endif // wxUSE_RICHEDIT
 365
 366     if (style & ES_MULTILINE)
 367         m_windowStyle |= wxTE_MULTILINE;
 368     if (style & ES_PASSWORD)
 369         m_windowStyle |= wxTE_PASSWORD;
 370     if (style & ES_READONLY)
 371         m_windowStyle |= wxTE_READONLY;
 372     if (style & ES_WANTRETURN)
 373         m_windowStyle |= wxTE_PROCESS_ENTER;
 374 }
 375
 376 // ----------------------------------------------------------------------------
 377 // set/get the controls text
 378 // ----------------------------------------------------------------------------
 379
 380 wxString wxTextCtrl::GetValue() const
 381 {
 382     // we can't use wxGetWindowText() (i.e. WM_GETTEXT internally) for
 383     // retrieving more than 64Kb under Win9x
 384 #if wxUSE_RICHEDIT
 385     if ( IsRich() )
 386     {
 387         wxString str;
 388
 389         int len = GetWindowTextLength(GetHwnd());
 390         if ( len )
 391         {
 392             // alloc one extra WORD as needed by the control
 393             wxChar *p = str.GetWriteBuf(++len);
 394
 395             TEXTRANGE textRange;
 396             textRange.chrg.cpMin = 0;
 397             textRange.chrg.cpMax = -1;
 398             textRange.lpstrText = p;
 399
 400             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 401
 402             // believe it or not, but EM_GETTEXTRANGE uses just CR ('\r') for
 403             // the newlines which is neither Unix nor Windows style (Win95 with
 404             // riched20.dll shows this behaviour) - convert it to something
 405             // reasonable
 406             for ( ; *p; p++ )
 407             {
 408                 if ( *p == _T('\r') )
 409                     *p = _T('\n');
 410             }
 411
 412             str.UngetWriteBuf();
 413         }
 414         //else: no text at all, leave the string empty
 415
 416         return str;
 417     }
 418 #endif // wxUSE_RICHEDIT
 419
 420     // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 421     // same one as above for consitency
 422     wxString str = wxGetWindowText(GetHWND());
 423
 424     return wxTextFile::Translate(str, wxTextFileType_Unix);
 425 }
 426
 427 void wxTextCtrl::SetValue(const wxString& value)
 428 {
 429     // if the text is long enough, it's faster to just set it instead of first
 430     // comparing it with the old one (chances are that it will be different
 431     // anyhow, this comparison is there to avoid flicker for small single-line
 432     // edit controls mostly)
 433     if ( (value.length() > 0x400) || (value != GetValue()) )
 434     {
 435         // it is simpler to do this but it could be more efficient to reproduce
 436         // WriteText() logic here
 437         Clear();
 438
 439         WriteText(value);
 440
 441         // mark the control as being not dirty - we changed its text, not the
 442         // user
 443         DiscardEdits();
 444
 445         // for compatibility, don't move the cursor when doing SetValue()
 446         SetInsertionPoint(0);
 447     }
 448 }
 449
 450 #if wxUSE_RICHEDIT && !wxUSE_UNICODE
 451
 452 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 453 {
 454     *pcb = 0;
 455
 456     wchar_t *wbuf = (wchar_t *)buf;
 457     const wchar_t *wpc = *(const wchar_t **)dwCookie;
 458     while ( cb && *wpc )
 459     {
 460         *wbuf++ = *wpc++;
 461
 462         cb -= sizeof(wchar_t);
 463         (*pcb) += sizeof(wchar_t);
 464     }
 465
 466     *(const wchar_t **)dwCookie = wpc;
 467
 468     return 0;
 469 }
 470
 471 extern long wxEncodingToCodepage(wxFontEncoding encoding); // from strconv.cpp
 472
 473 bool wxTextCtrl::StreamIn(const wxString& value, wxFontEncoding encoding)
 474 {
 475     // we have to use EM_STREAMIN to force richedit control 2.0+ to show any
 476     // text in the non default charset - otherwise it thinks it knows better
 477     // than we do and always shows it in the default one
 478
 479     // first get the Windows code page for this encoding
 480     long codepage = wxEncodingToCodepage(encoding);
 481     if ( codepage == -1 )
 482     {
 483         // unknown encoding
 484         return FALSE;
 485     }
 486
 487     // next translate to Unicode using this code page
 488     int len = ::MultiByteToWideChar(codepage, 0, value, -1, NULL, 0);
 489     wxWCharBuffer wchBuf(len);
 490     if ( !::MultiByteToWideChar(codepage, 0, value, -1,
 491                                 (wchar_t *)wchBuf.data(), len) )
 492     {
 493         wxLogLastError(_T("MultiByteToWideChar"));
 494     }
 495
 496     // finally, stream it in the control
 497     const wchar_t *wpc = wchBuf;
 498
 499     EDITSTREAM eds;
 500     wxZeroMemory(eds);
 501     eds.dwCookie = (DWORD)&wpc;
 502     // the cast below is needed for broken (very) old mingw32 headers
 503     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 504
 505     if ( !::SendMessage(GetHwnd(), EM_STREAMIN,
 506                         SF_TEXT | SF_UNICODE | SFF_SELECTION,
 507                         (LPARAM)&eds) || eds.dwError )
 508     {
 509         wxLogLastError(_T("EM_STREAMIN"));
 510
 511         return FALSE;
 512     }
 513
 514     return TRUE;
 515 }
 516
 517 #endif // wxUSE_RICHEDIT
 518
 519 void wxTextCtrl::WriteText(const wxString& value)
 520 {
 521     wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 522
 523 #if wxUSE_RICHEDIT
 524     // there are several complications with the rich edit controls here
 525     bool done = FALSE;
 526     if ( IsRich() )
 527     {
 528         // first, ensure that the new text will be in the default style
 529         if ( !m_defaultStyle.IsDefault() )
 530         {
 531             long start, end;
 532             GetSelection(&start, &end);
 533             SetStyle(start, end, m_defaultStyle );
 534         }
 535
 536 #if !wxUSE_UNICODE
 537         // next check if the text we're inserting must be shown in a non
 538         // default charset -- this only works for RichEdit > 1.0
 539         if ( GetRichVersion() > 1 )
 540         {
 541             wxFont font = m_defaultStyle.GetFont();
 542             if ( !font.Ok() )
 543                 font = GetFont();
 544
 545             if ( font.Ok() )
 546             {
 547                wxFontEncoding encoding = font.GetEncoding();
 548                if ( encoding != wxFONTENCODING_SYSTEM )
 549                {
 550                    done = StreamIn(valueDos, encoding);
 551                }
 552             }
 553         }
 554 #endif // !wxUSE_UNICODE
 555     }
 556
 557     if ( !done )
 558 #endif // wxUSE_RICHEDIT
 559     {
 560         ::SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
 561     }
 562
 563     AdjustSpaceLimit();
 564 }
 565
 566 void wxTextCtrl::AppendText(const wxString& text)
 567 {
 568     SetInsertionPointEnd();
 569
 570     WriteText(text);
 571 }
 572
 573 void wxTextCtrl::Clear()
 574 {
 575     ::SetWindowText(GetHwnd(), wxT(""));
 576 }
 577
 578 // ----------------------------------------------------------------------------
 579 // Clipboard operations
 580 // ----------------------------------------------------------------------------
 581
 582 void wxTextCtrl::Copy()
 583 {
 584     if (CanCopy())
 585     {
 586         HWND hWnd = GetHwnd();
 587         SendMessage(hWnd, WM_COPY, 0, 0L);
 588     }
 589 }
 590
 591 void wxTextCtrl::Cut()
 592 {
 593     if (CanCut())
 594     {
 595         HWND hWnd = GetHwnd();
 596         SendMessage(hWnd, WM_CUT, 0, 0L);
 597     }
 598 }
 599
 600 void wxTextCtrl::Paste()
 601 {
 602     if (CanPaste())
 603     {
 604         HWND hWnd = GetHwnd();
 605         SendMessage(hWnd, WM_PASTE, 0, 0L);
 606     }
 607 }
 608
 609 bool wxTextCtrl::CanCopy() const
 610 {
 611     // Can copy if there's a selection
 612     long from, to;
 613     GetSelection(& from, & to);
 614     return (from != to) ;
 615 }
 616
 617 bool wxTextCtrl::CanCut() const
 618 {
 619     // Can cut if there's a selection
 620     long from, to;
 621     GetSelection(& from, & to);
 622     return (from != to) && (IsEditable());
 623 }
 624
 625 bool wxTextCtrl::CanPaste() const
 626 {
 627     if ( !IsEditable() )
 628         return FALSE;
 629
 630 #if wxUSE_RICHEDIT
 631     if ( IsRich() )
 632     {
 633         UINT cf = 0; // 0 == any format
 634
 635         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
 636     }
 637 #endif // wxUSE_RICHEDIT
 638
 639     // Standard edit control: check for straight text on clipboard
 640     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 641         return FALSE;
 642
 643     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
 644     ::CloseClipboard();
 645
 646     return isTextAvailable;
 647 }
 648
 649 // ----------------------------------------------------------------------------
 650 // Accessors
 651 // ----------------------------------------------------------------------------
 652
 653 void wxTextCtrl::SetEditable(bool editable)
 654 {
 655     HWND hWnd = GetHwnd();
 656     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 657 }
 658
 659 void wxTextCtrl::SetInsertionPoint(long pos)
 660 {
 661     SetSelection(pos, pos);
 662 }
 663
 664 void wxTextCtrl::SetInsertionPointEnd()
 665 {
 666     long pos = GetLastPosition();
 667     SetInsertionPoint(pos);
 668 }
 669
 670 long wxTextCtrl::GetInsertionPoint() const
 671 {
 672 #if wxUSE_RICHEDIT
 673     if ( IsRich() )
 674     {
 675         CHARRANGE range;
 676         range.cpMin = 0;
 677         range.cpMax = 0;
 678         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 679         return range.cpMin;
 680     }
 681 #endif // wxUSE_RICHEDIT
 682
 683     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 684     return Pos & 0xFFFF;
 685 }
 686
 687 long wxTextCtrl::GetLastPosition() const
 688 {
 689     HWND hWnd = GetHwnd();
 690
 691     // Will always return a number > 0 (according to docs)
 692     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 693
 694     // This gets the char index for the _beginning_ of the last line
 695     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 696
 697     // Get number of characters in the last line. We'll add this to the character
 698     // index for the last line, 1st position.
 699     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 700
 701     return (long)(charIndex + lineLength);
 702 }
 703
 704 // If the return values from and to are the same, there is no
 705 // selection.
 706 void wxTextCtrl::GetSelection(long* from, long* to) const
 707 {
 708 #if wxUSE_RICHEDIT
 709     if ( IsRich() )
 710     {
 711         CHARRANGE charRange;
 712         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
 713
 714         *from = charRange.cpMin;
 715         *to = charRange.cpMax;
 716     }
 717     else
 718 #endif // !wxUSE_RICHEDIT
 719     {
 720         DWORD dwStart, dwEnd;
 721         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
 722
 723         *from = dwStart;
 724         *to = dwEnd;
 725     }
 726 }
 727
 728 wxString wxTextCtrl::GetStringSelection() const
 729 {
 730     // the base class version works correctly for the rich text controls
 731     // because there the lines are terminated with just '\r' which means that
 732     // the string length is not changed in the result of the translations doen
 733     // in GetValue() but for the normal ones when we replace "\r\n" with '\n'
 734     // we break the indices
 735 #if wxUSE_RICHEDIT
 736     if ( IsRich() )
 737         return wxTextCtrlBase::GetStringSelection();
 738 #endif // wxUSE_RICHEDIT
 739
 740     long from, to;
 741     GetSelection(&from, &to);
 742
 743     wxString str;
 744     if ( from < to )
 745     {
 746         str = wxGetWindowText(GetHWND()).Mid(from, to - from);
 747
 748         // and now that we have the correct selection, convert it to the
 749         // correct format
 750         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 751     }
 752
 753     return str;
 754 }
 755
 756 bool wxTextCtrl::IsEditable() const
 757 {
 758     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 759
 760     return ((style & ES_READONLY) == 0);
 761 }
 762
 763 // ----------------------------------------------------------------------------
 764 // selection
 765 // ----------------------------------------------------------------------------
 766
 767 void wxTextCtrl::SetSelection(long from, long to)
 768 {
 769     DoSetSelection(from, to);
 770 }
 771
 772 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
 773 {
 774     // if from and to are both -1, it means (in wxWindows) that all text should
 775     // be selected - translate into Windows convention
 776     if ( (from == -1) && (to == -1) )
 777     {
 778         from = 0;
 779         to = -1;
 780     }
 781
 782     HWND hWnd = GetHwnd();
 783
 784 #ifdef __WIN32__
 785 #if wxUSE_RICHEDIT
 786     if ( IsRich() )
 787     {
 788         CHARRANGE range;
 789         range.cpMin = from;
 790         range.cpMax = to;
 791         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 792     }
 793     else
 794 #endif // wxUSE_RICHEDIT
 795     {
 796         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
 797     }
 798
 799     if ( scrollCaret )
 800     {
 801 #if wxUSE_RICHEDIT
 802         // EM_SCROLLCARET doesn't work for me with the richedit controls
 803         // unless it has focus although I don't see any mention of it in the
 804         // docs - this is the only workaround I found. Of course it's not
 805         // perfect as it adds the dummy focus set/kill events but it's still
 806         // better than nothing
 807         HWND hwndFocusOld;
 808         if ( IsRich() )
 809         {
 810             hwndFocusOld = ::GetFocus();
 811             if ( hwndFocusOld == GetHwnd() )
 812             {
 813                 // don't change focus
 814                 hwndFocusOld = 0;
 815             }
 816
 817             if ( hwndFocusOld )
 818             {
 819                 ::SetFocus(GetHwnd());
 820             }
 821         }
 822         else // not rich
 823         {
 824             hwndFocusOld = 0;
 825         }
 826 #endif // wxUSE_RICHEDIT
 827
 828         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 829
 830 #if wxUSE_RICHEDIT
 831         if ( hwndFocusOld )
 832         {
 833             ::SetFocus(hwndFocusOld);
 834         }
 835 #endif // wxUSE_RICHEDIT
 836     }
 837 #else // Win16
 838     // WPARAM is 0: selection is scrolled into view
 839     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
 840 #endif // Win32/16
 841 }
 842
 843 // ----------------------------------------------------------------------------
 844 // Editing
 845 // ----------------------------------------------------------------------------
 846
 847 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 848 {
 849     // Set selection and remove it
 850     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
 851
 852     SendMessage(GetHwnd(), EM_REPLACESEL,
 853 #ifdef __WIN32__
 854                 TRUE,
 855 #else
 856                 FALSE,
 857 #endif
 858                 (LPARAM)value.c_str());
 859 }
 860
 861 void wxTextCtrl::Remove(long from, long to)
 862 {
 863     Replace(from, to, _T(""));
 864 }
 865
 866 bool wxTextCtrl::LoadFile(const wxString& file)
 867 {
 868     if ( wxTextCtrlBase::LoadFile(file) )
 869     {
 870         // update the size limit if needed
 871         AdjustSpaceLimit();
 872
 873         return TRUE;
 874     }
 875
 876     return FALSE;
 877 }
 878
 879 bool wxTextCtrl::IsModified() const
 880 {
 881     return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
 882 }
 883
 884 // Makes 'unmodified'
 885 void wxTextCtrl::DiscardEdits()
 886 {
 887     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 888 }
 889
 890 int wxTextCtrl::GetNumberOfLines() const
 891 {
 892     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 893 }
 894
 895 long wxTextCtrl::XYToPosition(long x, long y) const
 896 {
 897     HWND hWnd = GetHwnd();
 898
 899     // This gets the char index for the _beginning_ of this line
 900     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 901     return (long)(x + charIndex);
 902 }
 903
 904 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 905 {
 906     HWND hWnd = GetHwnd();
 907
 908     // This gets the line number containing the character
 909     int lineNo;
 910 #if wxUSE_RICHEDIT
 911     if ( IsRich() )
 912     {
 913         lineNo = (int)SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
 914     }
 915     else
 916 #endif // wxUSE_RICHEDIT
 917         lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
 918
 919     if ( lineNo == -1 )
 920     {
 921         // no such line
 922         return FALSE;
 923     }
 924
 925     // This gets the char index for the _beginning_ of this line
 926     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 927     if ( charIndex == -1 )
 928     {
 929         return FALSE;
 930     }
 931
 932     // The X position must therefore be the different between pos and charIndex
 933     if ( x )
 934         *x = (long)(pos - charIndex);
 935     if ( y )
 936         *y = (long)lineNo;
 937
 938     return TRUE;
 939 }
 940
 941 void wxTextCtrl::ShowPosition(long pos)
 942 {
 943     HWND hWnd = GetHwnd();
 944
 945     // To scroll to a position, we pass the number of lines and characters
 946     // to scroll *by*. This means that we need to:
 947     // (1) Find the line position of the current line.
 948     // (2) Find the line position of pos.
 949     // (3) Scroll by (pos - current).
 950     // For now, ignore the horizontal scrolling.
 951
 952     // Is this where scrolling is relative to - the line containing the caret?
 953     // Or is the first visible line??? Try first visible line.
 954 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 955
 956     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 957
 958     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 959
 960     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 961
 962     if (linesToScroll != 0)
 963       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 964 }
 965
 966 int wxTextCtrl::GetLineLength(long lineNo) const
 967 {
 968     long charIndex = XYToPosition(0, lineNo);
 969     int len = (int)SendMessage(GetHwnd(), EM_LINELENGTH, charIndex, 0);
 970     return len;
 971 }
 972
 973 wxString wxTextCtrl::GetLineText(long lineNo) const
 974 {
 975     size_t len = (size_t)GetLineLength(lineNo) + 1;
 976
 977     // there must be at least enough place for the length WORD in the
 978     // buffer
 979     len += sizeof(WORD);
 980
 981     wxString str;
 982     wxChar *buf = str.GetWriteBuf(len);
 983
 984     *(WORD *)buf = (WORD)len;
 985     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
 986     buf[len] = 0;
 987
 988     str.UngetWriteBuf(len);
 989
 990     return str;
 991 }
 992
 993 void wxTextCtrl::SetMaxLength(unsigned long len)
 994 {
 995     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
 996 }
 997
 998 // ----------------------------------------------------------------------------
 999 // Undo/redo
1000 // ----------------------------------------------------------------------------
1001
1002 void wxTextCtrl::Undo()
1003 {
1004     if (CanUndo())
1005     {
1006         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1007     }
1008 }
1009
1010 void wxTextCtrl::Redo()
1011 {
1012     if (CanRedo())
1013     {
1014         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1015         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1016     }
1017 }
1018
1019 bool wxTextCtrl::CanUndo() const
1020 {
1021     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
1022 }
1023
1024 bool wxTextCtrl::CanRedo() const
1025 {
1026     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
1027 }
1028
1029 // ----------------------------------------------------------------------------
1030 // implemenation details
1031 // ----------------------------------------------------------------------------
1032
1033 void wxTextCtrl::Command(wxCommandEvent & event)
1034 {
1035     SetValue(event.GetString());
1036     ProcessCommand (event);
1037 }
1038
1039 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1040 {
1041     // By default, load the first file into the text window.
1042     if (event.GetNumberOfFiles() > 0)
1043     {
1044         LoadFile(event.GetFiles()[0]);
1045     }
1046 }
1047
1048 // ----------------------------------------------------------------------------
1049 // kbd input processing
1050 // ----------------------------------------------------------------------------
1051
1052 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1053 {
1054     MSG *msg = (MSG *)pMsg;
1055
1056     // check for our special keys here: if we don't do it and the parent frame
1057     // uses them as accelerators, they wouldn't work at all, so we disable
1058     // usual preprocessing for them
1059     if ( msg->message == WM_KEYDOWN )
1060     {
1061         WORD vkey = msg->wParam;
1062         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1063         {
1064             if ( vkey == VK_BACK )
1065                 return FALSE;
1066         }
1067         else // no Alt
1068         {
1069             if ( wxIsCtrlDown() )
1070             {
1071                 switch ( vkey )
1072                 {
1073                     case 'C':
1074                     case 'V':
1075                     case 'X':
1076                     case VK_INSERT:
1077                     case VK_DELETE:
1078                     case VK_HOME:
1079                     case VK_END:
1080                         return FALSE;
1081                 }
1082             }
1083             else if ( wxIsShiftDown() )
1084             {
1085                 if ( vkey == VK_INSERT || vkey == VK_DELETE )
1086                     return FALSE;
1087             }
1088         }
1089     }
1090
1091     return wxControl::MSWShouldPreProcessMessage(pMsg);
1092 }
1093
1094 void wxTextCtrl::OnChar(wxKeyEvent& event)
1095 {
1096     switch ( event.KeyCode() )
1097     {
1098         case WXK_RETURN:
1099             if ( !(m_windowStyle & wxTE_MULTILINE) )
1100             {
1101                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1102                 InitCommandEvent(event);
1103                 event.SetString(GetValue());
1104                 if ( GetEventHandler()->ProcessEvent(event) )
1105                     return;
1106             }
1107             //else: multiline controls need Enter for themselves
1108
1109             break;
1110
1111         case WXK_TAB:
1112             // always produce navigation event - even if we process TAB
1113             // ourselves the fact that we got here means that the user code
1114             // decided to skip processing of this TAB - probably to let it
1115             // do its default job.
1116             {
1117                 wxNavigationKeyEvent eventNav;
1118                 eventNav.SetDirection(!event.ShiftDown());
1119                 eventNav.SetWindowChange(event.ControlDown());
1120                 eventNav.SetEventObject(this);
1121
1122                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1123                     return;
1124             }
1125             break;
1126     }
1127
1128     // no, we didn't process it
1129     event.Skip();
1130 }
1131
1132 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1133 {
1134     switch (param)
1135     {
1136         case EN_SETFOCUS:
1137         case EN_KILLFOCUS:
1138             {
1139                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1140                                                          : wxEVT_SET_FOCUS,
1141                                    m_windowId);
1142                 event.SetEventObject( this );
1143                 GetEventHandler()->ProcessEvent(event);
1144             }
1145             break;
1146
1147         case EN_CHANGE:
1148             {
1149                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1150                 InitCommandEvent(event);
1151                 event.SetString(GetValue());
1152                 ProcessCommand(event);
1153             }
1154             break;
1155
1156         case EN_MAXTEXT:
1157             // the text size limit has been hit - increase it
1158             if ( !AdjustSpaceLimit() )
1159             {
1160                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1161                 InitCommandEvent(event);
1162                 event.SetString(GetValue());
1163                 ProcessCommand(event);
1164             }
1165             break;
1166
1167             // the other notification messages are not processed
1168         case EN_UPDATE:
1169         case EN_ERRSPACE:
1170         case EN_HSCROLL:
1171         case EN_VSCROLL:
1172             return FALSE;
1173         default:
1174             return FALSE;
1175     }
1176
1177     // processed
1178     return TRUE;
1179 }
1180
1181 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1182 #if wxUSE_CTL3D
1183                                WXUINT message,
1184                                WXWPARAM wParam,
1185                                WXLPARAM lParam
1186 #else
1187                                WXUINT WXUNUSED(message),
1188                                WXWPARAM WXUNUSED(wParam),
1189                                WXLPARAM WXUNUSED(lParam)
1190 #endif
1191     )
1192 {
1193 #if wxUSE_CTL3D
1194     if ( m_useCtl3D )
1195     {
1196         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1197         return (WXHBRUSH) hbrush;
1198     }
1199 #endif // wxUSE_CTL3D
1200
1201     HDC hdc = (HDC)pDC;
1202     if (GetParent()->GetTransparentBackground())
1203         SetBkMode(hdc, TRANSPARENT);
1204     else
1205         SetBkMode(hdc, OPAQUE);
1206
1207     wxColour colBack = GetBackgroundColour();
1208
1209     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1210         colBack = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
1211
1212     ::SetBkColor(hdc, wxColourToRGB(colBack));
1213     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1214
1215     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1216
1217     return (WXHBRUSH)brush->GetResourceHandle();
1218 }
1219
1220 // In WIN16, need to override normal erasing because
1221 // Ctl3D doesn't use the wxWindows background colour.
1222 #ifdef __WIN16__
1223 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1224 {
1225     wxColour col(m_backgroundColour);
1226
1227 #if wxUSE_CTL3D
1228     if (m_useCtl3D)
1229         col = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
1230 #endif
1231
1232     RECT rect;
1233     ::GetClientRect(GetHwnd(), &rect);
1234
1235     COLORREF ref = PALETTERGB(col.Red(),
1236                               col.Green(),
1237                               col.Blue());
1238     HBRUSH hBrush = ::CreateSolidBrush(ref);
1239     if ( !hBrush )
1240         wxLogLastError(wxT("CreateSolidBrush"));
1241
1242     HDC hdc = (HDC)event.GetDC()->GetHDC();
1243
1244     int mode = ::SetMapMode(hdc, MM_TEXT);
1245
1246     ::FillRect(hdc, &rect, hBrush);
1247     ::DeleteObject(hBrush);
1248     ::SetMapMode(hdc, mode);
1249
1250 }
1251 #endif // Win16
1252
1253 bool wxTextCtrl::AdjustSpaceLimit()
1254 {
1255 #ifndef __WIN16__
1256     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1257
1258     // HACK: we try to automatically extend the limit for the amount of text
1259     //       to allow (interactively) entering more than 64Kb of text under
1260     //       Win9x but we shouldn't reset the text limit which was previously
1261     //       set explicitly with SetMaxLength()
1262     //
1263     //       we could solve this by storing the limit we set in wxTextCtrl but
1264     //       to save space we prefer to simply test here the actual limit
1265     //       value: we consider that SetMaxLength() can only be called for
1266     //       values < 32Kb
1267     if ( limit < 0x8000 )
1268     {
1269         // we've got more text than limit set by SetMaxLength()
1270         return FALSE;
1271     }
1272
1273     unsigned int len = ::GetWindowTextLength(GetHwnd());
1274     if ( len >= limit )
1275     {
1276         limit = len + 0x8000;    // 32Kb
1277
1278 #if wxUSE_RICHEDIT
1279         if ( IsRich() )
1280         {
1281             // as a nice side effect, this also allows passing limit > 64Kb
1282             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1283         }
1284         else
1285 #endif // wxUSE_RICHEDIT
1286         {
1287             if ( limit > 0xffff )
1288             {
1289                 // this will set it to a platform-dependent maximum (much more
1290                 // than 64Kb under NT)
1291                 limit = 0;
1292             }
1293
1294             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1295         }
1296     }
1297 #endif // !Win16
1298
1299     // we changed the limit
1300     return TRUE;
1301 }
1302
1303 bool wxTextCtrl::AcceptsFocus() const
1304 {
1305     // we don't want focus if we can't be edited
1306     return IsEditable() && wxControl::AcceptsFocus();
1307 }
1308
1309 wxSize wxTextCtrl::DoGetBestSize() const
1310 {
1311     int cx, cy;
1312     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1313
1314     int wText = DEFAULT_ITEM_WIDTH;
1315
1316     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1317     if ( m_windowStyle & wxTE_MULTILINE )
1318     {
1319         hText *= wxMax(GetNumberOfLines(), 5);
1320     }
1321     //else: for single line control everything is ok
1322
1323     return wxSize(wText, hText);
1324 }
1325
1326 // ----------------------------------------------------------------------------
1327 // standard handlers for standard edit menu events
1328 // ----------------------------------------------------------------------------
1329
1330 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1331 {
1332     Cut();
1333 }
1334
1335 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1336 {
1337     Copy();
1338 }
1339
1340 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1341 {
1342     Paste();
1343 }
1344
1345 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1346 {
1347     Undo();
1348 }
1349
1350 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1351 {
1352     Redo();
1353 }
1354
1355 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1356 {
1357     event.Enable( CanCut() );
1358 }
1359
1360 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1361 {
1362     event.Enable( CanCopy() );
1363 }
1364
1365 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1366 {
1367     event.Enable( CanPaste() );
1368 }
1369
1370 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1371 {
1372     event.Enable( CanUndo() );
1373 }
1374
1375 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1376 {
1377     event.Enable( CanRedo() );
1378 }
1379
1380 // the rest of the file only deals with the rich edit controls
1381 #if wxUSE_RICHEDIT
1382
1383 // ----------------------------------------------------------------------------
1384 // EN_LINK processing
1385 // ----------------------------------------------------------------------------
1386
1387 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1388 {
1389     NMHDR *hdr = (NMHDR* )lParam;
1390     if ( hdr->code == EN_LINK )
1391     {
1392         ENLINK *enlink = (ENLINK *)hdr;
1393
1394         switch ( enlink->msg )
1395         {
1396             case WM_SETCURSOR:
1397                 // ok, so it is hardcoded - do we really nee to customize it?
1398                 ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1399                 *result = TRUE;
1400                 break;
1401
1402             case WM_MOUSEMOVE:
1403             case WM_LBUTTONDOWN:
1404             case WM_LBUTTONUP:
1405             case WM_LBUTTONDBLCLK:
1406             case WM_RBUTTONDOWN:
1407             case WM_RBUTTONUP:
1408             case WM_RBUTTONDBLCLK:
1409                 // send a mouse event
1410                 {
1411                     static const wxEventType eventsMouse[] =
1412                     {
1413                         wxEVT_MOTION,
1414                         wxEVT_LEFT_DOWN,
1415                         wxEVT_LEFT_UP,
1416                         wxEVT_LEFT_DCLICK,
1417                         wxEVT_RIGHT_DOWN,
1418                         wxEVT_RIGHT_UP,
1419                         wxEVT_RIGHT_DCLICK,
1420                     };
1421
1422                     // the event ids are consecutive
1423                     wxMouseEvent
1424                         evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1425
1426                     InitMouseEvent(evtMouse,
1427                                    GET_X_LPARAM(enlink->lParam),
1428                                    GET_Y_LPARAM(enlink->lParam),
1429                                    enlink->wParam);
1430
1431                     wxTextUrlEvent event(m_windowId, evtMouse,
1432                                          enlink->chrg.cpMin,
1433                                          enlink->chrg.cpMax);
1434
1435                     InitCommandEvent(event);
1436
1437                     *result = ProcessCommand(event);
1438                 }
1439                 break;
1440         }
1441
1442         return TRUE;
1443     }
1444
1445     // not processed
1446     return FALSE;
1447 }
1448
1449 // ----------------------------------------------------------------------------
1450 // colour setting for the rich edit controls
1451 // ----------------------------------------------------------------------------
1452
1453 // Watcom C++ doesn't define this
1454 #ifndef SCF_ALL
1455 #define SCF_ALL 0x0004
1456 #endif
1457
1458 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1459 {
1460     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1461     {
1462         // colour didn't really change
1463         return FALSE;
1464     }
1465
1466     if ( IsRich() )
1467     {
1468         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1469         // EM_SETBKGNDCOLOR additionally
1470         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1471     }
1472
1473     return TRUE;
1474 }
1475
1476 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1477 {
1478     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1479     {
1480         // colour didn't really change
1481         return FALSE;
1482     }
1483
1484     if ( IsRich() )
1485     {
1486         // change the colour of everything
1487         CHARFORMAT cf;
1488         wxZeroMemory(cf);
1489         cf.cbSize = sizeof(cf);
1490         cf.dwMask = CFM_COLOR;
1491         cf.crTextColor = wxColourToRGB(colour);
1492         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1493     }
1494
1495     return TRUE;
1496 }
1497
1498 // ----------------------------------------------------------------------------
1499 // styling support for rich edit controls
1500 // ----------------------------------------------------------------------------
1501
1502 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1503 {
1504     if ( !IsRich() )
1505     {
1506         // can't do it with normal text control
1507         return FALSE;
1508     }
1509
1510     // the rich text control doesn't handle setting background colour, so don't
1511     // even try if it's the only thing we want to change
1512     if ( wxRichEditModule::GetLoadedVersion() < 2 &&
1513          !style.HasFont() && !style.HasTextColour() )
1514     {
1515         // nothing to do: return TRUE if there was really nothing to do and
1516         // FALSE if we failed to set bg colour
1517         return !style.HasBackgroundColour();
1518     }
1519
1520     // order the range if needed
1521     if ( start > end )
1522     {
1523         long tmp = start;
1524         start = end;
1525         end = tmp;
1526     }
1527
1528     // we can only change the format of the selection, so select the range we
1529     // want and restore the old selection later
1530     long startOld, endOld;
1531     GetSelection(&startOld, &endOld);
1532
1533     // but do we really have to change the selection?
1534     bool changeSel = start != startOld || end != endOld;
1535
1536     if ( changeSel )
1537     {
1538         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
1539     }
1540
1541     // initialize CHARFORMAT struct
1542 #if wxUSE_RICHEDIT2
1543     CHARFORMAT2 cf;
1544 #else
1545     CHARFORMAT cf;
1546 #endif
1547     wxZeroMemory(cf);
1548     cf.cbSize = sizeof(cf);
1549
1550     if ( style.HasFont() )
1551     {
1552         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
1553         //     but using it doesn't seem to hurt neither so leaving it for now
1554
1555         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1556                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1557
1558         // fill in data from LOGFONT but recalculate lfHeight because we need
1559         // the real height in twips and not the negative number which
1560         // wxFillLogFont() returns (this is correct in general and works with
1561         // the Windows font mapper, but not here)
1562         LOGFONT lf;
1563         wxFillLogFont(&lf, &style.GetFont());
1564         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1565         cf.bCharSet = lf.lfCharSet;
1566         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1567         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1568
1569         // also deal with underline/italic/bold attributes: note that we must
1570         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1571         // style to allow clearing it
1572         if ( lf.lfItalic )
1573         {
1574             cf.dwEffects |= CFE_ITALIC;
1575         }
1576
1577         if ( lf.lfWeight == FW_BOLD )
1578         {
1579             cf.dwEffects |= CFE_BOLD;
1580         }
1581
1582         if ( lf.lfUnderline )
1583         {
1584             cf.dwEffects |= CFE_UNDERLINE;
1585         }
1586
1587         // strikeout fonts are not supported by wxWindows
1588     }
1589
1590     if ( style.HasTextColour() )
1591     {
1592         cf.dwMask |= CFM_COLOR;
1593         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1594     }
1595
1596 #if wxUSE_RICHEDIT2
1597     if ( wxRichEditModule::GetLoadedVersion() > 1 && style.HasBackgroundColour() )
1598     {
1599         cf.dwMask |= CFM_BACKCOLOR;
1600         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1601     }
1602 #endif // wxUSE_RICHEDIT2
1603
1604     // do format the selection
1605     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1606                             SCF_SELECTION, (LPARAM)&cf) != 0;
1607     if ( !ok )
1608     {
1609         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1610     }
1611
1612     if ( changeSel )
1613     {
1614         // restore the original selection
1615         DoSetSelection(startOld, endOld, FALSE);
1616     }
1617
1618     return ok;
1619 }
1620
1621 // ----------------------------------------------------------------------------
1622 // wxRichEditModule
1623 // ----------------------------------------------------------------------------
1624
1625 bool wxRichEditModule::OnInit()
1626 {
1627     // don't do anything - we will load it when needed
1628     return TRUE;
1629 }
1630
1631 void wxRichEditModule::OnExit()
1632 {
1633     if ( ms_hRichEdit )
1634     {
1635         FreeLibrary(ms_hRichEdit);
1636     }
1637 }
1638
1639 /* static */
1640 bool wxRichEditModule::Load(int version)
1641 {
1642     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1643                  _T("incorrect richedit control version requested") );
1644
1645     if ( version <= ms_verRichEdit )
1646     {
1647         // we've already got this or better
1648         return TRUE;
1649     }
1650
1651     if ( ms_hRichEdit )
1652     {
1653         ::FreeLibrary(ms_hRichEdit);
1654     }
1655
1656     // always try load riched20.dll first - like this we won't have to reload
1657     // it later if we're first asked for RE 1 and then for RE 2 or 3
1658     wxString dllname = _T("riched20.dll");
1659     ms_hRichEdit = ::LoadLibrary(dllname);
1660     ms_verRichEdit = 2; // no way to tell if it's 2 or 3, assume 2
1661
1662     if ( !ms_hRichEdit && (version == 1) )
1663     {
1664         // fall back to RE 1
1665         dllname = _T("riched32.dll");
1666         ms_hRichEdit = ::LoadLibrary(dllname);
1667         ms_verRichEdit = 1;
1668     }
1669
1670     if ( !ms_hRichEdit )
1671     {
1672         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1673
1674         ms_verRichEdit = -1;
1675
1676         return FALSE;
1677     }
1678
1679     return TRUE;
1680 }
1681
1682 #endif // wxUSE_RICHEDIT
1683
1684 #endif // wxUSE_TEXTCTRL