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 #ifndef WX_PRECOMP
  32     #include "wx/textctrl.h"
  33     #include "wx/settings.h"
  34     #include "wx/brush.h"
  35     #include "wx/utils.h"
  36     #include "wx/intl.h"
  37     #include "wx/log.h"
  38     #include "wx/app.h"
  39 #endif
  40
  41 #include "wx/module.h"
  42
  43 #if wxUSE_CLIPBOARD
  44     #include "wx/clipbrd.h"
  45 #endif
  46
  47 #include "wx/textfile.h"
  48
  49 #include <windowsx.h>
  50
  51 #include "wx/msw/private.h"
  52
  53 #include <string.h>
  54 #include <stdlib.h>
  55 #include <sys/types.h>
  56
  57 #if wxUSE_IOSTREAMH
  58 #   include <fstream.h>
  59 #else
  60 #   include <fstream>
  61 #endif
  62
  63 #if wxUSE_RICHEDIT && (!defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__))
  64     #include <richedit.h>
  65 #endif
  66
  67 // old mingw32 doesn't define this
  68 #ifndef CFM_CHARSET
  69     #define CFM_CHARSET 0x08000000
  70 #endif // CFM_CHARSET
  71
  72 // ----------------------------------------------------------------------------
  73 // private classes
  74 // ----------------------------------------------------------------------------
  75
  76 #if wxUSE_RICHEDIT
  77
  78 // this module initializes RichEdit DLL if needed
  79 class wxRichEditModule : public wxModule
  80 {
  81 public:
  82     virtual bool OnInit();
  83     virtual void OnExit();
  84
  85     // get the version currently loaded, -1 if none
  86     static int GetLoadedVersion() { return ms_verRichEdit; }
  87
  88     // load the richedit DLL of at least of required version
  89     static bool Load(int version = 1);
  90
  91 private:
  92     // the handle to richedit DLL and the version of the DLL loaded
  93     static HINSTANCE ms_hRichEdit;
  94
  95     // the DLL version loaded or -1 if none
  96     static int ms_verRichEdit;
  97
  98     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
  99 };
 100
 101 HINSTANCE wxRichEditModule::ms_hRichEdit = (HINSTANCE)NULL;
 102 int       wxRichEditModule::ms_verRichEdit = -1;
 103
 104 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 105
 106 #endif // wxUSE_RICHEDIT
 107
 108 // ----------------------------------------------------------------------------
 109 // event tables and other macros
 110 // ----------------------------------------------------------------------------
 111
 112 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 113
 114 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 115     EVT_CHAR(wxTextCtrl::OnChar)
 116     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 117
 118     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 119     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 120     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 121     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 122     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 123
 124     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 125     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 126     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 127     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 128     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 129 #ifdef __WIN16__
 130     EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
 131 #endif
 132 END_EVENT_TABLE()
 133
 134 // ============================================================================
 135 // implementation
 136 // ============================================================================
 137
 138 // ----------------------------------------------------------------------------
 139 // creation
 140 // ----------------------------------------------------------------------------
 141
 142 wxTextCtrl::wxTextCtrl()
 143 {
 144 #if wxUSE_RICHEDIT
 145     m_isRich = FALSE;
 146 #endif
 147 }
 148
 149 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 150                         const wxString& value,
 151                         const wxPoint& pos,
 152                         const wxSize& size,
 153                         long style,
 154                         const wxValidator& validator,
 155                         const wxString& name)
 156 {
 157     // base initialization
 158     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 159         return FALSE;
 160
 161     if ( parent )
 162         parent->AddChild(this);
 163
 164     // translate wxWin style flags to MSW ones, checking for consistency while
 165     // doing it
 166     long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 167
 168     if ( m_windowStyle & wxCLIP_SIBLINGS )
 169         msStyle |= WS_CLIPSIBLINGS;
 170
 171     if ( m_windowStyle & wxTE_MULTILINE )
 172     {
 173         wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
 174                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 175
 176         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 177         if ((m_windowStyle & wxTE_NO_VSCROLL) == 0)
 178             msStyle |= WS_VSCROLL;
 179         m_windowStyle |= wxTE_PROCESS_ENTER;
 180     }
 181     else
 182         msStyle |= ES_AUTOHSCROLL;
 183
 184     if (m_windowStyle & wxHSCROLL)
 185         msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL);
 186
 187     if (m_windowStyle & wxTE_READONLY)
 188         msStyle |= ES_READONLY;
 189
 190     if (m_windowStyle & wxTE_PASSWORD) // hidden input
 191         msStyle |= ES_PASSWORD;
 192
 193    if (m_windowStyle & wxTE_AUTO_SCROLL)
 194         msStyle |=  ES_AUTOHSCROLL;
 195
 196
 197     // we always want the characters and the arrows
 198     m_lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
 199
 200     // we may have several different cases:
 201     // 1. normal case: both TAB and ENTER are used for dialog navigation
 202     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
 203     //    control in the dialog
 204     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
 205     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
 206     //    the next control
 207     if ( m_windowStyle & wxTE_PROCESS_ENTER )
 208         m_lDlgCode |= DLGC_WANTMESSAGE;
 209     if ( m_windowStyle & wxTE_PROCESS_TAB )
 210         m_lDlgCode |= DLGC_WANTTAB;
 211
 212     // do create the control - either an EDIT or RICHEDIT
 213     wxString windowClass = wxT("EDIT");
 214
 215 #if wxUSE_RICHEDIT
 216     if ( m_windowStyle & wxTE_RICH )
 217     {
 218         static bool s_errorGiven = FALSE;   // MT-FIXME
 219
 220         // only give the error msg once if the DLL can't be loaded
 221         if ( !s_errorGiven )
 222         {
 223             // first try to load the RichEdit DLL (will do nothing if already
 224             // done)
 225             if ( !wxRichEditModule::Load() )
 226             {
 227                 wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 228
 229                 s_errorGiven = TRUE;
 230             }
 231         }
 232
 233         if ( s_errorGiven )
 234         {
 235             m_isRich = FALSE;
 236         }
 237         else
 238         {
 239             msStyle |= ES_AUTOVSCROLL;
 240             m_isRich = TRUE;
 241
 242             int ver = wxRichEditModule::GetLoadedVersion();
 243             if ( ver == 1 )
 244             {
 245                 windowClass = wxT("RICHEDIT");
 246             }
 247             else
 248             {
 249 #ifndef RICHEDIT_CLASS
 250                 wxString RICHEDIT_CLASS;
 251                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), ver);
 252 #if wxUSE_UNICODE
 253                 RICHEDIT_CLASS += _T('W');
 254 #else // ANSI
 255                 RICHEDIT_CLASS += _T('A');
 256 #endif // Unicode/ANSI
 257 #endif // !RICHEDIT_CLASS
 258
 259                 windowClass = RICHEDIT_CLASS;
 260             }
 261         }
 262     }
 263     else
 264         m_isRich = FALSE;
 265 #endif // wxUSE_RICHEDIT
 266
 267     bool want3D;
 268     WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
 269
 270     // Even with extended styles, need to combine with WS_BORDER for them to
 271     // look right.
 272     if ( want3D || wxStyleHasBorder(m_windowStyle) )
 273         msStyle |= WS_BORDER;
 274
 275     // NB: don't use pos and size as CreateWindowEx arguments because they
 276     //     might be -1 in which case we should use the default values (and
 277     //     SetSize called below takes care of it)
 278     m_hWnd = (WXHWND)::CreateWindowEx(exStyle,
 279                                       windowClass.c_str(),
 280                                       NULL,
 281                                       msStyle,
 282                                       0, 0, 0, 0,
 283                                       GetHwndOf(parent),
 284                                       (HMENU)m_windowId,
 285                                       wxGetInstance(),
 286                                       NULL);
 287
 288     wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create text ctrl") );
 289
 290 #if wxUSE_CTL3D
 291     if ( want3D )
 292     {
 293         Ctl3dSubclassCtl(GetHwnd());
 294         m_useCtl3D = TRUE;
 295     }
 296 #endif
 297
 298 #if wxUSE_RICHEDIT
 299     if (m_isRich)
 300     {
 301         // Have to enable events
 302         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0,
 303                       ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE);
 304     }
 305 #endif
 306
 307     SubclassWin(GetHWND());
 308
 309     // set font, position, size and initial value
 310     wxFont& fontParent = parent->GetFont();
 311     if ( fontParent.Ok() )
 312     {
 313         SetFont(fontParent);
 314     }
 315     else
 316     {
 317         SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 318     }
 319
 320     // Causes a crash for Symantec C++ and WIN32 for some reason
 321 #if !(defined(__SC__) && defined(__WIN32__))
 322     if ( !value.IsEmpty() )
 323     {
 324         SetValue(value);
 325     }
 326 #endif
 327
 328     // set colours
 329     SetupColours();
 330
 331     SetSize(pos.x, pos.y, size.x, size.y);
 332
 333     return TRUE;
 334 }
 335
 336 // Make sure the window style (etc.) reflects the HWND style (roughly)
 337 void wxTextCtrl::AdoptAttributesFromHWND()
 338 {
 339   wxWindow::AdoptAttributesFromHWND();
 340
 341   HWND hWnd = GetHwnd();
 342   long style = GetWindowLong(hWnd, GWL_STYLE);
 343
 344   // retrieve the style to see whether this is an edit or richedit ctrl
 345 #if wxUSE_RICHEDIT
 346   wxChar buf[256];
 347
 348   GetClassName(hWnd, buf, WXSIZEOF(buf));
 349
 350   if ( wxStricmp(buf, wxT("EDIT")) == 0 )
 351     m_isRich = FALSE;
 352   else
 353     m_isRich = TRUE;
 354 #endif // wxUSE_RICHEDIT
 355
 356   if (style & ES_MULTILINE)
 357     m_windowStyle |= wxTE_MULTILINE;
 358   if (style & ES_PASSWORD)
 359     m_windowStyle |= wxTE_PASSWORD;
 360   if (style & ES_READONLY)
 361     m_windowStyle |= wxTE_READONLY;
 362   if (style & ES_WANTRETURN)
 363     m_windowStyle |= wxTE_PROCESS_ENTER;
 364 }
 365
 366 void wxTextCtrl::SetupColours()
 367 {
 368     wxColour bkgndColour;
 369 //    if (IsEditable() || (m_windowStyle & wxTE_MULTILINE))
 370         bkgndColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
 371 //    else
 372 //        bkgndColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
 373
 374     SetBackgroundColour(bkgndColour);
 375     SetForegroundColour(GetParent()->GetForegroundColour());
 376 }
 377
 378 // ----------------------------------------------------------------------------
 379 // set/get the controls text
 380 // ----------------------------------------------------------------------------
 381
 382 wxString wxTextCtrl::GetValue() const
 383 {
 384     // we can't use wxGetWindowText() (i.e. WM_GETTEXT internally) for
 385     // retrieving more than 64Kb under Win9x
 386 #if wxUSE_RICHEDIT
 387     if ( m_isRich )
 388     {
 389         wxString str;
 390
 391         int len = GetWindowTextLength(GetHwnd());
 392         if ( len )
 393         {
 394             // alloc one extra WORD as needed by the control
 395             wxChar *p = str.GetWriteBuf(++len);
 396
 397             TEXTRANGE textRange;
 398             textRange.chrg.cpMin = 0;
 399             textRange.chrg.cpMax = -1;
 400             textRange.lpstrText = p;
 401
 402             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 403
 404             // believe it or not, but EM_GETTEXTRANGE uses just CR ('\r') for
 405             // the newlines which is neither Unix nor Windows style (Win95 with
 406             // riched20.dll shows this behaviour) - convert it to something
 407             // reasonable
 408             for ( ; *p; p++ )
 409             {
 410                 if ( *p == _T('\r') )
 411                     *p = _T('\n');
 412             }
 413
 414             str.UngetWriteBuf();
 415         }
 416         //else: no text at all, leave the string empty
 417
 418         return str;
 419     }
 420 #endif // wxUSE_RICHEDIT
 421
 422     // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 423     // same one as above for consitency
 424     wxString str = wxGetWindowText(GetHWND());
 425
 426     return wxTextFile::Translate(str, wxTextFileType_Unix);
 427 }
 428
 429 void wxTextCtrl::SetValue(const wxString& value)
 430 {
 431     // if the text is long enough, it's faster to just set it instead of first
 432     // comparing it with the old one (chances are that it will be different
 433     // anyhow, this comparison is there to avoid flicker for small single-line
 434     // edit controls mostly)
 435     if ( (value.length() > 0x400) || (value != GetValue()) )
 436     {
 437         wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 438
 439         SetWindowText(GetHwnd(), valueDos.c_str());
 440
 441         // for compatibility with the GTK and because it is more logical, we
 442         // move the cursor to the end of the text after SetValue()
 443
 444         // GRG, Jun/2000: Changed this back after a lot of discussion
 445         //   in the lists. wxWindows 2.2 will have a set of flags to
 446         //   customize this behaviour.
 447         //SetInsertionPointEnd();
 448
 449         AdjustSpaceLimit();
 450     }
 451 }
 452
 453 void wxTextCtrl::WriteText(const wxString& value)
 454 {
 455     wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 456
 457 #if wxUSE_RICHEDIT
 458     // ensure that the new text will be in the default style
 459     if ( IsRich() &&
 460             (m_defaultStyle.HasFont() || m_defaultStyle.HasTextColour()) )
 461     {
 462         long start, end;
 463         GetSelection(&start, &end);
 464         SetStyle(start, end, m_defaultStyle );
 465     }
 466 #endif // wxUSE_RICHEDIT
 467
 468     SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
 469
 470     AdjustSpaceLimit();
 471 }
 472
 473 void wxTextCtrl::AppendText(const wxString& text)
 474 {
 475     SetInsertionPointEnd();
 476     WriteText(text);
 477 }
 478
 479 void wxTextCtrl::Clear()
 480 {
 481     SetWindowText(GetHwnd(), wxT(""));
 482 }
 483
 484 // ----------------------------------------------------------------------------
 485 // Clipboard operations
 486 // ----------------------------------------------------------------------------
 487
 488 void wxTextCtrl::Copy()
 489 {
 490     if (CanCopy())
 491     {
 492         HWND hWnd = GetHwnd();
 493         SendMessage(hWnd, WM_COPY, 0, 0L);
 494     }
 495 }
 496
 497 void wxTextCtrl::Cut()
 498 {
 499     if (CanCut())
 500     {
 501         HWND hWnd = GetHwnd();
 502         SendMessage(hWnd, WM_CUT, 0, 0L);
 503     }
 504 }
 505
 506 void wxTextCtrl::Paste()
 507 {
 508     if (CanPaste())
 509     {
 510         HWND hWnd = GetHwnd();
 511         SendMessage(hWnd, WM_PASTE, 0, 0L);
 512     }
 513 }
 514
 515 bool wxTextCtrl::CanCopy() const
 516 {
 517     // Can copy if there's a selection
 518     long from, to;
 519     GetSelection(& from, & to);
 520     return (from != to) ;
 521 }
 522
 523 bool wxTextCtrl::CanCut() const
 524 {
 525     // Can cut if there's a selection
 526     long from, to;
 527     GetSelection(& from, & to);
 528     return (from != to) && (IsEditable());
 529 }
 530
 531 bool wxTextCtrl::CanPaste() const
 532 {
 533 #if wxUSE_RICHEDIT
 534     if (m_isRich)
 535     {
 536         int dataFormat = 0; // 0 == any format
 537         return (::SendMessage( GetHwnd(), EM_CANPASTE, (WPARAM) (UINT) dataFormat, 0) != 0);
 538     }
 539 #endif
 540     if (!IsEditable())
 541         return FALSE;
 542
 543     // Standard edit control: check for straight text on clipboard
 544     bool isTextAvailable = FALSE;
 545     if ( ::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 546     {
 547         isTextAvailable = (::IsClipboardFormatAvailable(CF_TEXT) != 0);
 548         ::CloseClipboard();
 549     }
 550
 551     return isTextAvailable;
 552 }
 553
 554 // ----------------------------------------------------------------------------
 555 // Accessors
 556 // ----------------------------------------------------------------------------
 557
 558 void wxTextCtrl::SetEditable(bool editable)
 559 {
 560     HWND hWnd = GetHwnd();
 561     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 562 }
 563
 564 void wxTextCtrl::SetInsertionPoint(long pos)
 565 {
 566     HWND hWnd = GetHwnd();
 567 #ifdef __WIN32__
 568 #if wxUSE_RICHEDIT
 569     if ( m_isRich)
 570     {
 571         CHARRANGE range;
 572         range.cpMin = pos;
 573         range.cpMax = pos;
 574         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 575         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 576     }
 577     else
 578 #endif // wxUSE_RICHEDIT
 579     {
 580         SendMessage(hWnd, EM_SETSEL, pos, pos);
 581         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 582     }
 583 #else // Win16
 584     SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 585 #endif // Win32/16
 586
 587     static const wxChar *nothing = _T("");
 588     SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 589 }
 590
 591 void wxTextCtrl::SetInsertionPointEnd()
 592 {
 593     long pos = GetLastPosition();
 594     SetInsertionPoint(pos);
 595 }
 596
 597 long wxTextCtrl::GetInsertionPoint() const
 598 {
 599 #if wxUSE_RICHEDIT
 600     if (m_isRich)
 601     {
 602         CHARRANGE range;
 603         range.cpMin = 0;
 604         range.cpMax = 0;
 605         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 606         return range.cpMin;
 607     }
 608 #endif
 609
 610     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 611     return Pos & 0xFFFF;
 612 }
 613
 614 long wxTextCtrl::GetLastPosition() const
 615 {
 616     HWND hWnd = GetHwnd();
 617
 618     // Will always return a number > 0 (according to docs)
 619     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 620
 621     // This gets the char index for the _beginning_ of the last line
 622     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 623
 624     // Get number of characters in the last line. We'll add this to the character
 625     // index for the last line, 1st position.
 626     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 627
 628     return (long)(charIndex + lineLength);
 629 }
 630
 631 // If the return values from and to are the same, there is no
 632 // selection.
 633 void wxTextCtrl::GetSelection(long* from, long* to) const
 634 {
 635 #if wxUSE_RICHEDIT
 636     if (m_isRich)
 637     {
 638         CHARRANGE charRange;
 639         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) (CHARRANGE*) & charRange);
 640
 641         *from = charRange.cpMin;
 642         *to = charRange.cpMax;
 643     }
 644     else
 645 #endif // rich/!rich
 646     {
 647         DWORD dwStart, dwEnd;
 648         WPARAM wParam = (WPARAM) &dwStart; // receives starting position
 649         LPARAM lParam = (LPARAM) &dwEnd;   // receives ending position
 650
 651         ::SendMessage(GetHwnd(), EM_GETSEL, wParam, lParam);
 652
 653         *from = dwStart;
 654         *to = dwEnd;
 655     }
 656 }
 657
 658 bool wxTextCtrl::IsEditable() const
 659 {
 660     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 661
 662     return ((style & ES_READONLY) == 0);
 663 }
 664
 665 // ----------------------------------------------------------------------------
 666 // Editing
 667 // ----------------------------------------------------------------------------
 668
 669 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 670 {
 671 #if wxUSE_CLIPBOARD
 672     HWND hWnd = GetHwnd();
 673     long fromChar = from;
 674     long toChar = to;
 675
 676     // Set selection and remove it
 677 #ifdef __WIN32__
 678     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 679 #else
 680     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 681 #endif
 682     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 683
 684     // Now replace with 'value', by pasting.
 685     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const wxChar *)value, 0, 0);
 686
 687     // Paste into edit control
 688     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 689 #else
 690     wxFAIL_MSG("wxTextCtrl::Replace not implemented if wxUSE_CLIPBOARD is 0.");
 691 #endif
 692 }
 693
 694 void wxTextCtrl::Remove(long from, long to)
 695 {
 696     HWND hWnd = GetHwnd();
 697     long fromChar = from;
 698     long toChar = to;
 699
 700     // Cut all selected text
 701 #ifdef __WIN32__
 702     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 703 #else
 704     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 705 #endif
 706     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 707 }
 708
 709 void wxTextCtrl::SetSelection(long from, long to)
 710 {
 711     HWND hWnd = GetHwnd();
 712     long fromChar = from;
 713     long toChar = to;
 714
 715     // if from and to are both -1, it means (in wxWindows) that all text should
 716     // be selected. Translate into Windows convention
 717     if ((from == -1) && (to == -1))
 718     {
 719       fromChar = 0;
 720       toChar = -1;
 721     }
 722
 723 #ifdef __WIN32__
 724     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 725     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 726 #else
 727     // WPARAM is 0: selection is scrolled into view
 728     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 729 #endif
 730 }
 731
 732 bool wxTextCtrl::LoadFile(const wxString& file)
 733 {
 734     if ( wxTextCtrlBase::LoadFile(file) )
 735     {
 736         // update the size limit if needed
 737         AdjustSpaceLimit();
 738
 739         return TRUE;
 740     }
 741
 742     return FALSE;
 743 }
 744
 745 bool wxTextCtrl::IsModified() const
 746 {
 747     return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
 748 }
 749
 750 // Makes 'unmodified'
 751 void wxTextCtrl::DiscardEdits()
 752 {
 753     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 754 }
 755
 756 int wxTextCtrl::GetNumberOfLines() const
 757 {
 758     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 759 }
 760
 761 long wxTextCtrl::XYToPosition(long x, long y) const
 762 {
 763     HWND hWnd = GetHwnd();
 764
 765     // This gets the char index for the _beginning_ of this line
 766     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 767     return (long)(x + charIndex);
 768 }
 769
 770 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 771 {
 772     HWND hWnd = GetHwnd();
 773
 774     // This gets the line number containing the character
 775     int lineNo;
 776 #if wxUSE_RICHEDIT
 777     if ( m_isRich )
 778     {
 779         lineNo = (int)SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
 780     }
 781     else
 782 #endif // wxUSE_RICHEDIT
 783         lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
 784
 785     if ( lineNo == -1 )
 786     {
 787         // no such line
 788         return FALSE;
 789     }
 790
 791     // This gets the char index for the _beginning_ of this line
 792     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 793     if ( charIndex == -1 )
 794     {
 795         return FALSE;
 796     }
 797
 798     // The X position must therefore be the different between pos and charIndex
 799     if ( x )
 800         *x = (long)(pos - charIndex);
 801     if ( y )
 802         *y = (long)lineNo;
 803
 804     return TRUE;
 805 }
 806
 807 void wxTextCtrl::ShowPosition(long pos)
 808 {
 809     HWND hWnd = GetHwnd();
 810
 811     // To scroll to a position, we pass the number of lines and characters
 812     // to scroll *by*. This means that we need to:
 813     // (1) Find the line position of the current line.
 814     // (2) Find the line position of pos.
 815     // (3) Scroll by (pos - current).
 816     // For now, ignore the horizontal scrolling.
 817
 818     // Is this where scrolling is relative to - the line containing the caret?
 819     // Or is the first visible line??? Try first visible line.
 820 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 821
 822     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 823
 824     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 825
 826     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 827
 828     if (linesToScroll != 0)
 829       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 830 }
 831
 832 int wxTextCtrl::GetLineLength(long lineNo) const
 833 {
 834     long charIndex = XYToPosition(0, lineNo);
 835     int len = (int)SendMessage(GetHwnd(), EM_LINELENGTH, charIndex, 0);
 836     return len;
 837 }
 838
 839 wxString wxTextCtrl::GetLineText(long lineNo) const
 840 {
 841     size_t len = (size_t)GetLineLength(lineNo) + 1;
 842
 843     // there must be at least enough place for the length WORD in the
 844     // buffer
 845     len += sizeof(WORD);
 846
 847     wxString str;
 848     wxChar *buf = str.GetWriteBuf(len);
 849
 850     *(WORD *)buf = (WORD)len;
 851     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
 852     buf[len] = 0;
 853
 854     str.UngetWriteBuf(len);
 855
 856     return str;
 857 }
 858
 859 // ----------------------------------------------------------------------------
 860 // Undo/redo
 861 // ----------------------------------------------------------------------------
 862
 863 void wxTextCtrl::Undo()
 864 {
 865     if (CanUndo())
 866     {
 867         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 868     }
 869 }
 870
 871 void wxTextCtrl::Redo()
 872 {
 873     if (CanRedo())
 874     {
 875         // Same as Undo, since Undo undoes the undo, i.e. a redo.
 876         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 877     }
 878 }
 879
 880 bool wxTextCtrl::CanUndo() const
 881 {
 882     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 883 }
 884
 885 bool wxTextCtrl::CanRedo() const
 886 {
 887     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 888 }
 889
 890 // ----------------------------------------------------------------------------
 891 // implemenation details
 892 // ----------------------------------------------------------------------------
 893
 894 void wxTextCtrl::Command(wxCommandEvent & event)
 895 {
 896     SetValue(event.GetString());
 897     ProcessCommand (event);
 898 }
 899
 900 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 901 {
 902     // By default, load the first file into the text window.
 903     if (event.GetNumberOfFiles() > 0)
 904     {
 905         LoadFile(event.GetFiles()[0]);
 906     }
 907 }
 908
 909 void wxTextCtrl::OnChar(wxKeyEvent& event)
 910 {
 911     switch ( event.KeyCode() )
 912     {
 913         case WXK_RETURN:
 914             if ( !(m_windowStyle & wxTE_MULTILINE) )
 915             {
 916                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 917                 InitCommandEvent(event);
 918                 event.SetString(GetValue());
 919                 if ( GetEventHandler()->ProcessEvent(event) )
 920                     return;
 921             }
 922             //else: multiline controls need Enter for themselves
 923
 924             break;
 925
 926         case WXK_TAB:
 927             // always produce navigation event - even if we process TAB
 928             // ourselves the fact that we got here means that the user code
 929             // decided to skip processing of this TAB - probably to let it
 930             // do its default job.
 931             {
 932                 wxNavigationKeyEvent eventNav;
 933                 eventNav.SetDirection(!event.ShiftDown());
 934                 eventNav.SetWindowChange(event.ControlDown());
 935                 eventNav.SetEventObject(this);
 936
 937                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
 938                     return;
 939             }
 940             break;
 941     }
 942
 943     // no, we didn't process it
 944     event.Skip();
 945 }
 946
 947 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 948 {
 949     switch (param)
 950     {
 951         case EN_SETFOCUS:
 952         case EN_KILLFOCUS:
 953             {
 954                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
 955                         : wxEVT_SET_FOCUS,
 956                         m_windowId);
 957                 event.SetEventObject( this );
 958                 GetEventHandler()->ProcessEvent(event);
 959             }
 960             break;
 961
 962         case EN_CHANGE:
 963             {
 964                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
 965                 InitCommandEvent(event);
 966                 event.SetString(GetValue());
 967                 ProcessCommand(event);
 968             }
 969             break;
 970
 971         case EN_MAXTEXT:
 972             // the text size limit has been hit - increase it
 973             AdjustSpaceLimit();
 974             break;
 975
 976             // the other notification messages are not processed
 977         case EN_UPDATE:
 978         case EN_ERRSPACE:
 979         case EN_HSCROLL:
 980         case EN_VSCROLL:
 981             return FALSE;
 982         default:
 983             return FALSE;
 984     }
 985
 986     // processed
 987     return TRUE;
 988 }
 989
 990 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
 991 #if wxUSE_CTL3D
 992                                WXUINT message,
 993                                WXWPARAM wParam,
 994                                WXLPARAM lParam
 995 #else
 996                                WXUINT WXUNUSED(message),
 997                                WXWPARAM WXUNUSED(wParam),
 998                                WXLPARAM WXUNUSED(lParam)
 999 #endif
1000     )
1001 {
1002 #if wxUSE_CTL3D
1003     if ( m_useCtl3D )
1004     {
1005         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1006         return (WXHBRUSH) hbrush;
1007     }
1008 #endif // wxUSE_CTL3D
1009
1010     HDC hdc = (HDC)pDC;
1011     if (GetParent()->GetTransparentBackground())
1012         SetBkMode(hdc, TRANSPARENT);
1013     else
1014         SetBkMode(hdc, OPAQUE);
1015
1016     wxColour colBack = GetBackgroundColour();
1017
1018     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1019         colBack = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
1020
1021     ::SetBkColor(hdc, wxColourToRGB(colBack));
1022     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1023
1024     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1025
1026     return (WXHBRUSH)brush->GetResourceHandle();
1027 }
1028
1029 // In WIN16, need to override normal erasing because
1030 // Ctl3D doesn't use the wxWindows background colour.
1031 #ifdef __WIN16__
1032 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1033 {
1034     wxColour col(m_backgroundColour);
1035
1036 #if wxUSE_CTL3D
1037     if (m_useCtl3D)
1038         col = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
1039 #endif
1040
1041     RECT rect;
1042     ::GetClientRect(GetHwnd(), &rect);
1043
1044     COLORREF ref = PALETTERGB(col.Red(),
1045                               col.Green(),
1046                               col.Blue());
1047     HBRUSH hBrush = ::CreateSolidBrush(ref);
1048     if ( !hBrush )
1049         wxLogLastError(wxT("CreateSolidBrush"));
1050
1051     HDC hdc = (HDC)event.GetDC()->GetHDC();
1052
1053     int mode = ::SetMapMode(hdc, MM_TEXT);
1054
1055     ::FillRect(hdc, &rect, hBrush);
1056     ::DeleteObject(hBrush);
1057     ::SetMapMode(hdc, mode);
1058
1059 }
1060 #endif
1061
1062 void wxTextCtrl::AdjustSpaceLimit()
1063 {
1064 #ifndef __WIN16__
1065     unsigned int len = ::GetWindowTextLength(GetHwnd()),
1066     limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1067     if ( len >= limit )
1068     {
1069         limit = len + 0x8000;    // 32Kb
1070
1071 #if wxUSE_RICHEDIT
1072         if ( m_isRich )
1073         {
1074             // as a nice side effect, this also allows passing limit > 64Kb
1075             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1076         }
1077         else
1078 #endif // wxUSE_RICHEDIT
1079         {
1080             if ( limit > 0xffff )
1081             {
1082                 // this will set it to a platform-dependent maximum (much more
1083                 // than 64Kb under NT)
1084                 limit = 0;
1085             }
1086
1087             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1088         }
1089     }
1090 #endif // !Win16
1091 }
1092
1093 bool wxTextCtrl::AcceptsFocus() const
1094 {
1095     // we don't want focus if we can't be edited
1096     return IsEditable() && wxControl::AcceptsFocus();
1097 }
1098
1099 wxSize wxTextCtrl::DoGetBestSize() const
1100 {
1101     int cx, cy;
1102     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1103
1104     int wText = DEFAULT_ITEM_WIDTH;
1105
1106     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1107     if ( m_windowStyle & wxTE_MULTILINE )
1108     {
1109         hText *= wxMax(GetNumberOfLines(), 5);
1110     }
1111     //else: for single line control everything is ok
1112
1113     return wxSize(wText, hText);
1114 }
1115
1116 // ----------------------------------------------------------------------------
1117 // standard handlers for standard edit menu events
1118 // ----------------------------------------------------------------------------
1119
1120 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1121 {
1122     Cut();
1123 }
1124
1125 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1126 {
1127     Copy();
1128 }
1129
1130 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1131 {
1132     Paste();
1133 }
1134
1135 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1136 {
1137     Undo();
1138 }
1139
1140 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1141 {
1142     Redo();
1143 }
1144
1145 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1146 {
1147     event.Enable( CanCut() );
1148 }
1149
1150 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1151 {
1152     event.Enable( CanCopy() );
1153 }
1154
1155 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1156 {
1157     event.Enable( CanPaste() );
1158 }
1159
1160 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1161 {
1162     event.Enable( CanUndo() );
1163 }
1164
1165 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1166 {
1167     event.Enable( CanRedo() );
1168 }
1169
1170 // the rest of the file only deals with the rich edit controls
1171 #if wxUSE_RICHEDIT
1172
1173 // ----------------------------------------------------------------------------
1174 // colour setting for the rich edit controls
1175 // ----------------------------------------------------------------------------
1176
1177 // Watcom C++ doesn't define this
1178 #ifndef SCF_ALL
1179 #define SCF_ALL 0x0004
1180 #endif
1181
1182 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1183 {
1184     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1185     {
1186         // colour didn't really change
1187         return FALSE;
1188     }
1189
1190     if ( IsRich() )
1191     {
1192         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1193         // EM_SETBKGNDCOLOR additionally
1194         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1195     }
1196
1197     return TRUE;
1198 }
1199
1200 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1201 {
1202     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1203     {
1204         // colour didn't really change
1205         return FALSE;
1206     }
1207
1208     if ( IsRich() )
1209     {
1210         // change the colour of everything
1211         CHARFORMAT cf;
1212         wxZeroMemory(cf);
1213         cf.cbSize = sizeof(cf);
1214         cf.dwMask = CFM_COLOR;
1215         cf.crTextColor = wxColourToRGB(colour);
1216         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1217     }
1218
1219     return TRUE;
1220 }
1221
1222 // ----------------------------------------------------------------------------
1223 // styling support for rich edit controls
1224 // ----------------------------------------------------------------------------
1225
1226 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1227 {
1228     if ( !IsRich() )
1229     {
1230         // can't do it with normal text control
1231         return FALSE;
1232     }
1233
1234     // the rich text control doesn't handle setting background colour, so don't
1235     // even try if it's the only thing we want to change
1236     if ( wxRichEditModule::GetLoadedVersion() < 2 &&
1237          !style.HasFont() && !style.HasTextColour() )
1238     {
1239         // nothing to do: return TRUE if there was really nothing to do and
1240         // FALSE if we failed to set bg colour
1241         return !style.HasBackgroundColour();
1242     }
1243
1244     // order the range if needed
1245     if ( start > end )
1246     {
1247         long tmp = start;
1248         start = end;
1249         end = tmp;
1250     }
1251
1252     // we can only change the format of the selection, so select the range we
1253     // want and restore the old selection later
1254     long startOld, endOld;
1255     GetSelection(&startOld, &endOld);
1256
1257     // but do we really have to change the selection?
1258     bool changeSel = start != startOld || end != endOld;
1259
1260     if ( changeSel )
1261         SendMessage(GetHwnd(), EM_SETSEL, (WPARAM) start, (LPARAM) end);
1262
1263     // initialize CHARFORMAT struct
1264 #if wxUSE_RICHEDIT2
1265     CHARFORMAT2 cf;
1266 #else
1267     CHARFORMAT cf;
1268 #endif
1269     wxZeroMemory(cf);
1270     cf.cbSize = sizeof(cf);
1271
1272     if ( style.HasFont() )
1273     {
1274         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET;
1275
1276         // fill in data from LOGFONT but recalculate lfHeight because we need
1277         // the real height in twips and not the negative number which
1278         // wxFillLogFont() returns (this is correct in general and works with
1279         // the Windows font mapper, but not here)
1280         LOGFONT lf;
1281         wxFillLogFont(&lf, &style.GetFont());
1282         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1283         cf.bCharSet = lf.lfCharSet;
1284         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1285         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1286
1287         // also deal with underline/italic/bold attributes
1288         if ( lf.lfItalic )
1289         {
1290             cf.dwMask |= CFM_ITALIC;
1291             cf.dwEffects |= CFE_ITALIC;
1292         }
1293
1294         if ( lf.lfWeight == FW_BOLD )
1295         {
1296             cf.dwMask |= CFM_BOLD;
1297             cf.dwEffects |= CFE_BOLD;
1298         }
1299
1300         if ( lf.lfUnderline )
1301         {
1302             cf.dwMask |= CFM_UNDERLINE;
1303             cf.dwEffects |= CFE_UNDERLINE;
1304         }
1305
1306         // strikeout fonts are not supported by wxWindows
1307     }
1308
1309     if ( style.HasTextColour() )
1310     {
1311         cf.dwMask |= CFM_COLOR;
1312         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1313     }
1314
1315 #if wxUSE_RICHEDIT2
1316 #ifndef CFM_BACKCOLOR
1317 #define CFM_BACKCOLOR 0x04000000
1318 #endif
1319
1320     if ( wxRichEditModule::GetLoadedVersion() > 1 && style.HasBackgroundColour() )
1321     {
1322         cf.dwMask |= CFM_BACKCOLOR;
1323         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1324     }
1325 #endif
1326     // do format the selection
1327     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1328                             SCF_SELECTION, (LPARAM)&cf) != 0;
1329     if ( !ok )
1330     {
1331         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1332     }
1333
1334     if ( changeSel )
1335     {
1336         // restore the original selection
1337         SendMessage(GetHwnd(), EM_SETSEL, (WPARAM)startOld, (LPARAM)endOld);
1338     }
1339
1340     return ok;
1341 }
1342
1343 // ----------------------------------------------------------------------------
1344 // wxRichEditModule
1345 // ----------------------------------------------------------------------------
1346
1347 bool wxRichEditModule::OnInit()
1348 {
1349     // don't do anything - we will load it when needed
1350     return TRUE;
1351 }
1352
1353 void wxRichEditModule::OnExit()
1354 {
1355     if ( ms_hRichEdit )
1356     {
1357         FreeLibrary(ms_hRichEdit);
1358     }
1359 }
1360
1361 /* static */
1362 bool wxRichEditModule::Load(int version)
1363 {
1364     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1365                  _T("incorrect richedit control version requested") );
1366
1367     if ( version <= ms_verRichEdit )
1368     {
1369         // we've already got this or better
1370         return TRUE;
1371     }
1372
1373     if ( ms_hRichEdit )
1374     {
1375         ::FreeLibrary(ms_hRichEdit);
1376     }
1377
1378     // always try load riched20.dll first - like this we won't have to reload
1379     // it later if we're first asked for RE 1 and then for RE 2 or 3
1380     wxString dllname = _T("riched20.dll");
1381     ms_hRichEdit = ::LoadLibrary(dllname);
1382     ms_verRichEdit = 2; // no way to tell if it's 2 or 3, assume 2
1383
1384     if ( !ms_hRichEdit && (version == 1) )
1385     {
1386         // fall back to RE 1
1387         dllname = _T("riched32.dll");
1388         ms_hRichEdit = ::LoadLibrary(dllname);
1389         ms_verRichEdit = 1;
1390     }
1391
1392     if ( !ms_hRichEdit )
1393     {
1394         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1395
1396         ms_verRichEdit = -1;
1397
1398         return FALSE;
1399     }
1400
1401     return TRUE;
1402 }
1403
1404 #endif // wxUSE_RICHEDIT
1405