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 // ----------------------------------------------------------------------------
  95 // private classes
  96 // ----------------------------------------------------------------------------
  97
  98 #if wxUSE_RICHEDIT
  99
 100 // this module initializes RichEdit DLL if needed
 101 class wxRichEditModule : public wxModule
 102 {
 103 public:
 104     virtual bool OnInit();
 105     virtual void OnExit();
 106
 107     // get the version currently loaded, -1 if none
 108     static int GetLoadedVersion() { return ms_verRichEdit; }
 109
 110     // load the richedit DLL of at least of required version
 111     static bool Load(int version = 1);
 112
 113 private:
 114     // the handle to richedit DLL and the version of the DLL loaded
 115     static HINSTANCE ms_hRichEdit;
 116
 117     // the DLL version loaded or -1 if none
 118     static int ms_verRichEdit;
 119
 120     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
 121 };
 122
 123 HINSTANCE wxRichEditModule::ms_hRichEdit = (HINSTANCE)NULL;
 124 int       wxRichEditModule::ms_verRichEdit = -1;
 125
 126 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 127
 128 #endif // wxUSE_RICHEDIT
 129
 130 // ----------------------------------------------------------------------------
 131 // event tables and other macros
 132 // ----------------------------------------------------------------------------
 133
 134 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 135
 136 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 137     EVT_CHAR(wxTextCtrl::OnChar)
 138     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 139
 140     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 141     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 142     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 143     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 144     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 145
 146     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 147     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 148     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 149     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 150     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 151 #ifdef __WIN16__
 152     EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
 153 #endif
 154 END_EVENT_TABLE()
 155
 156 // ============================================================================
 157 // implementation
 158 // ============================================================================
 159
 160 // ----------------------------------------------------------------------------
 161 // creation
 162 // ----------------------------------------------------------------------------
 163
 164 wxTextCtrl::wxTextCtrl()
 165 {
 166 #if wxUSE_RICHEDIT
 167     m_isRich = FALSE;
 168 #endif
 169 }
 170
 171 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 172                         const wxString& value,
 173                         const wxPoint& pos,
 174                         const wxSize& size,
 175                         long style,
 176                         const wxValidator& validator,
 177                         const wxString& name)
 178 {
 179     // base initialization
 180     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 181         return FALSE;
 182
 183     if ( parent )
 184         parent->AddChild(this);
 185
 186     // translate wxWin style flags to MSW ones, checking for consistency while
 187     // doing it
 188     long msStyle = ES_LEFT | WS_TABSTOP;
 189
 190     if ( m_windowStyle & wxCLIP_SIBLINGS )
 191         msStyle |= WS_CLIPSIBLINGS;
 192
 193     if ( m_windowStyle & wxTE_MULTILINE )
 194     {
 195         wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
 196                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 197
 198         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 199         if ((m_windowStyle & wxTE_NO_VSCROLL) == 0)
 200             msStyle |= WS_VSCROLL;
 201         m_windowStyle |= wxTE_PROCESS_ENTER;
 202     }
 203     else // !multiline
 204     {
 205         // there is really no reason to not have this style for single line
 206         // text controls
 207         msStyle |= ES_AUTOHSCROLL;
 208     }
 209
 210     if ( m_windowStyle & wxHSCROLL )
 211         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 212
 213     if ( m_windowStyle & wxTE_READONLY )
 214         msStyle |= ES_READONLY;
 215
 216     if ( m_windowStyle & wxTE_PASSWORD )
 217         msStyle |= ES_PASSWORD;
 218
 219     if ( m_windowStyle & wxTE_AUTO_SCROLL )
 220         msStyle |= ES_AUTOHSCROLL;
 221
 222     if ( m_windowStyle & wxTE_NOHIDESEL )
 223         msStyle |= ES_NOHIDESEL;
 224
 225     // we always want the characters and the arrows
 226     m_lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
 227
 228     // we may have several different cases:
 229     // 1. normal case: both TAB and ENTER are used for dialog navigation
 230     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
 231     //    control in the dialog
 232     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
 233     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
 234     //    the next control
 235     if ( m_windowStyle & wxTE_PROCESS_ENTER )
 236         m_lDlgCode |= DLGC_WANTMESSAGE;
 237     if ( m_windowStyle & wxTE_PROCESS_TAB )
 238         m_lDlgCode |= DLGC_WANTTAB;
 239
 240     // do create the control - either an EDIT or RICHEDIT
 241     wxString windowClass = wxT("EDIT");
 242
 243 #if wxUSE_RICHEDIT
 244     if ( m_windowStyle & wxTE_RICH )
 245     {
 246         static bool s_errorGiven = FALSE;   // MT-FIXME
 247
 248         // only give the error msg once if the DLL can't be loaded
 249         if ( !s_errorGiven )
 250         {
 251             // first try to load the RichEdit DLL (will do nothing if already
 252             // done)
 253             if ( !wxRichEditModule::Load() )
 254             {
 255                 wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 256
 257                 s_errorGiven = TRUE;
 258             }
 259         }
 260
 261         if ( s_errorGiven )
 262         {
 263             m_isRich = FALSE;
 264         }
 265         else
 266         {
 267             msStyle |= ES_AUTOVSCROLL;
 268             // Experimental: this seems to help with the scroll problem. See messages from Jekabs Andrushaitis <j.andrusaitis@konts.lv>
 269             // wx-dev list, entitled "[wx-dev] wxMSW-EVT_KEY_DOWN and wxMSW-wxTextCtrl" and "[wx-dev] TextCtrl (RichEdit)"
 270             // Unfortunately, showing the selection in blue when the control doesn't have
 271             // the focus is non-standard behaviour, and we need to find another workaround.
 272             //msStyle |= ES_NOHIDESEL ;
 273             m_isRich = TRUE;
 274
 275             int ver = wxRichEditModule::GetLoadedVersion();
 276             if ( ver == 1 )
 277             {
 278                 windowClass = wxT("RICHEDIT");
 279             }
 280             else
 281             {
 282 #ifndef RICHEDIT_CLASS
 283                 wxString RICHEDIT_CLASS;
 284                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), ver);
 285 #if wxUSE_UNICODE
 286                 RICHEDIT_CLASS += _T('W');
 287 #else // ANSI
 288                 RICHEDIT_CLASS += _T('A');
 289 #endif // Unicode/ANSI
 290 #endif // !RICHEDIT_CLASS
 291
 292                 windowClass = RICHEDIT_CLASS;
 293             }
 294         }
 295     }
 296     else
 297         m_isRich = FALSE;
 298 #endif // wxUSE_RICHEDIT
 299
 300     if ( !MSWCreateControl(windowClass, msStyle, pos, size, value) )
 301         return FALSE;
 302
 303     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 304
 305 #if wxUSE_RICHEDIT
 306     if (m_isRich)
 307     {
 308         // have to enable events manually
 309         LPARAM mask = ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE;
 310
 311         if ( m_windowStyle & wxTE_AUTO_URL )
 312         {
 313             mask |= ENM_LINK;
 314
 315             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 316         }
 317
 318         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 319     }
 320 #endif // wxUSE_RICHEDIT
 321
 322     return TRUE;
 323 }
 324
 325 // Make sure the window style (etc.) reflects the HWND style (roughly)
 326 void wxTextCtrl::AdoptAttributesFromHWND()
 327 {
 328   wxWindow::AdoptAttributesFromHWND();
 329
 330   HWND hWnd = GetHwnd();
 331   long style = GetWindowLong(hWnd, GWL_STYLE);
 332
 333   // retrieve the style to see whether this is an edit or richedit ctrl
 334 #if wxUSE_RICHEDIT
 335   wxChar buf[256];
 336
 337   GetClassName(hWnd, buf, WXSIZEOF(buf));
 338
 339   if ( wxStricmp(buf, wxT("EDIT")) == 0 )
 340     m_isRich = FALSE;
 341   else
 342     m_isRich = TRUE;
 343 #endif // wxUSE_RICHEDIT
 344
 345   if (style & ES_MULTILINE)
 346     m_windowStyle |= wxTE_MULTILINE;
 347   if (style & ES_PASSWORD)
 348     m_windowStyle |= wxTE_PASSWORD;
 349   if (style & ES_READONLY)
 350     m_windowStyle |= wxTE_READONLY;
 351   if (style & ES_WANTRETURN)
 352     m_windowStyle |= wxTE_PROCESS_ENTER;
 353 }
 354
 355 // ----------------------------------------------------------------------------
 356 // set/get the controls text
 357 // ----------------------------------------------------------------------------
 358
 359 wxString wxTextCtrl::GetValue() const
 360 {
 361     // we can't use wxGetWindowText() (i.e. WM_GETTEXT internally) for
 362     // retrieving more than 64Kb under Win9x
 363 #if wxUSE_RICHEDIT
 364     if ( m_isRich )
 365     {
 366         wxString str;
 367
 368         int len = GetWindowTextLength(GetHwnd());
 369         if ( len )
 370         {
 371             // alloc one extra WORD as needed by the control
 372             wxChar *p = str.GetWriteBuf(++len);
 373
 374             TEXTRANGE textRange;
 375             textRange.chrg.cpMin = 0;
 376             textRange.chrg.cpMax = -1;
 377             textRange.lpstrText = p;
 378
 379             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 380
 381             // believe it or not, but EM_GETTEXTRANGE uses just CR ('\r') for
 382             // the newlines which is neither Unix nor Windows style (Win95 with
 383             // riched20.dll shows this behaviour) - convert it to something
 384             // reasonable
 385             for ( ; *p; p++ )
 386             {
 387                 if ( *p == _T('\r') )
 388                     *p = _T('\n');
 389             }
 390
 391             str.UngetWriteBuf();
 392         }
 393         //else: no text at all, leave the string empty
 394
 395         return str;
 396     }
 397 #endif // wxUSE_RICHEDIT
 398
 399     // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 400     // same one as above for consitency
 401     wxString str = wxGetWindowText(GetHWND());
 402
 403     return wxTextFile::Translate(str, wxTextFileType_Unix);
 404 }
 405
 406 void wxTextCtrl::SetValue(const wxString& value)
 407 {
 408     // if the text is long enough, it's faster to just set it instead of first
 409     // comparing it with the old one (chances are that it will be different
 410     // anyhow, this comparison is there to avoid flicker for small single-line
 411     // edit controls mostly)
 412     if ( (value.length() > 0x400) || (value != GetValue()) )
 413     {
 414         wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 415
 416         SetWindowText(GetHwnd(), valueDos.c_str());
 417
 418         // for compatibility with the GTK and because it is more logical, we
 419         // move the cursor to the end of the text after SetValue()
 420
 421         // GRG, Jun/2000: Changed this back after a lot of discussion
 422         //   in the lists. wxWindows 2.2 will have a set of flags to
 423         //   customize this behaviour.
 424         //SetInsertionPointEnd();
 425
 426         AdjustSpaceLimit();
 427     }
 428 }
 429
 430 void wxTextCtrl::WriteText(const wxString& value)
 431 {
 432     wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 433
 434 #if wxUSE_RICHEDIT
 435     // ensure that the new text will be in the default style
 436     if ( IsRich() &&
 437             (m_defaultStyle.HasFont() || m_defaultStyle.HasTextColour()) )
 438     {
 439         long start, end;
 440         GetSelection(&start, &end);
 441         SetStyle(start, end, m_defaultStyle );
 442     }
 443 #endif // wxUSE_RICHEDIT
 444
 445     SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
 446
 447     AdjustSpaceLimit();
 448 }
 449
 450 void wxTextCtrl::AppendText(const wxString& text)
 451 {
 452     SetInsertionPointEnd();
 453     WriteText(text);
 454 }
 455
 456 void wxTextCtrl::Clear()
 457 {
 458     SetWindowText(GetHwnd(), wxT(""));
 459 }
 460
 461 // ----------------------------------------------------------------------------
 462 // Clipboard operations
 463 // ----------------------------------------------------------------------------
 464
 465 void wxTextCtrl::Copy()
 466 {
 467     if (CanCopy())
 468     {
 469         HWND hWnd = GetHwnd();
 470         SendMessage(hWnd, WM_COPY, 0, 0L);
 471     }
 472 }
 473
 474 void wxTextCtrl::Cut()
 475 {
 476     if (CanCut())
 477     {
 478         HWND hWnd = GetHwnd();
 479         SendMessage(hWnd, WM_CUT, 0, 0L);
 480     }
 481 }
 482
 483 void wxTextCtrl::Paste()
 484 {
 485     if (CanPaste())
 486     {
 487         HWND hWnd = GetHwnd();
 488         SendMessage(hWnd, WM_PASTE, 0, 0L);
 489     }
 490 }
 491
 492 bool wxTextCtrl::CanCopy() const
 493 {
 494     // Can copy if there's a selection
 495     long from, to;
 496     GetSelection(& from, & to);
 497     return (from != to) ;
 498 }
 499
 500 bool wxTextCtrl::CanCut() const
 501 {
 502     // Can cut if there's a selection
 503     long from, to;
 504     GetSelection(& from, & to);
 505     return (from != to) && (IsEditable());
 506 }
 507
 508 bool wxTextCtrl::CanPaste() const
 509 {
 510 #if wxUSE_RICHEDIT
 511     if (m_isRich)
 512     {
 513         int dataFormat = 0; // 0 == any format
 514         return (::SendMessage( GetHwnd(), EM_CANPASTE, (WPARAM) (UINT) dataFormat, 0) != 0);
 515     }
 516 #endif
 517     if (!IsEditable())
 518         return FALSE;
 519
 520     // Standard edit control: check for straight text on clipboard
 521     bool isTextAvailable = FALSE;
 522     if ( ::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 523     {
 524         isTextAvailable = (::IsClipboardFormatAvailable(CF_TEXT) != 0);
 525         ::CloseClipboard();
 526     }
 527
 528     return isTextAvailable;
 529 }
 530
 531 // ----------------------------------------------------------------------------
 532 // Accessors
 533 // ----------------------------------------------------------------------------
 534
 535 void wxTextCtrl::SetEditable(bool editable)
 536 {
 537     HWND hWnd = GetHwnd();
 538     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 539 }
 540
 541 void wxTextCtrl::SetInsertionPoint(long pos)
 542 {
 543     HWND hWnd = GetHwnd();
 544 #ifdef __WIN32__
 545 #if wxUSE_RICHEDIT
 546     if ( m_isRich)
 547     {
 548         CHARRANGE range;
 549         range.cpMin = pos;
 550         range.cpMax = pos;
 551         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 552         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 553     }
 554     else
 555 #endif // wxUSE_RICHEDIT
 556     {
 557         SendMessage(hWnd, EM_SETSEL, pos, pos);
 558         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 559     }
 560 #else // Win16
 561     SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 562 #endif // Win32/16
 563
 564 #if wxUSE_RICHEDIT
 565     if ( !m_isRich)
 566 #endif
 567     {
 568         static const wxChar *nothing = _T("");
 569         SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 570     }
 571 }
 572
 573 void wxTextCtrl::SetInsertionPointEnd()
 574 {
 575     long pos = GetLastPosition();
 576     SetInsertionPoint(pos);
 577 }
 578
 579 long wxTextCtrl::GetInsertionPoint() const
 580 {
 581 #if wxUSE_RICHEDIT
 582     if (m_isRich)
 583     {
 584         CHARRANGE range;
 585         range.cpMin = 0;
 586         range.cpMax = 0;
 587         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 588         return range.cpMin;
 589     }
 590 #endif
 591
 592     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 593     return Pos & 0xFFFF;
 594 }
 595
 596 long wxTextCtrl::GetLastPosition() const
 597 {
 598     HWND hWnd = GetHwnd();
 599
 600     // Will always return a number > 0 (according to docs)
 601     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 602
 603     // This gets the char index for the _beginning_ of the last line
 604     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 605
 606     // Get number of characters in the last line. We'll add this to the character
 607     // index for the last line, 1st position.
 608     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 609
 610     return (long)(charIndex + lineLength);
 611 }
 612
 613 // If the return values from and to are the same, there is no
 614 // selection.
 615 void wxTextCtrl::GetSelection(long* from, long* to) const
 616 {
 617 #if wxUSE_RICHEDIT
 618     if (m_isRich)
 619     {
 620         CHARRANGE charRange;
 621         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) (CHARRANGE*) & charRange);
 622
 623         *from = charRange.cpMin;
 624         *to = charRange.cpMax;
 625     }
 626     else
 627 #endif // rich/!rich
 628     {
 629         DWORD dwStart, dwEnd;
 630         WPARAM wParam = (WPARAM) &dwStart; // receives starting position
 631         LPARAM lParam = (LPARAM) &dwEnd;   // receives ending position
 632
 633         ::SendMessage(GetHwnd(), EM_GETSEL, wParam, lParam);
 634
 635         *from = dwStart;
 636         *to = dwEnd;
 637     }
 638 }
 639
 640 bool wxTextCtrl::IsEditable() const
 641 {
 642     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 643
 644     return ((style & ES_READONLY) == 0);
 645 }
 646
 647 // ----------------------------------------------------------------------------
 648 // Editing
 649 // ----------------------------------------------------------------------------
 650
 651 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 652 {
 653     HWND hWnd = GetHwnd();
 654     long fromChar = from;
 655     long toChar = to;
 656
 657     // Set selection and remove it
 658 #ifdef __WIN32__
 659     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 660     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)TRUE, (LPARAM)value.c_str());
 661 #else
 662     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 663     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)0, (LPARAM)value.c_str());
 664 #endif
 665 }
 666
 667 void wxTextCtrl::Remove(long from, long to)
 668 {
 669     HWND hWnd = GetHwnd();
 670     long fromChar = from;
 671     long toChar = to;
 672
 673     // Cut all selected text
 674 #ifdef __WIN32__
 675     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 676     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)TRUE, (LPARAM)"");
 677 #else
 678     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 679     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)0, (LPARAM)"");
 680 #endif
 681 }
 682
 683 void wxTextCtrl::SetSelection(long from, long to)
 684 {
 685     HWND hWnd = GetHwnd();
 686     long fromChar = from;
 687     long toChar = to;
 688
 689     // if from and to are both -1, it means (in wxWindows) that all text should
 690     // be selected. Translate into Windows convention
 691     if ((from == -1) && (to == -1))
 692     {
 693       fromChar = 0;
 694       toChar = -1;
 695     }
 696
 697 #ifdef __WIN32__
 698     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 699     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 700 #else
 701     // WPARAM is 0: selection is scrolled into view
 702     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 703 #endif
 704 }
 705
 706 bool wxTextCtrl::LoadFile(const wxString& file)
 707 {
 708     if ( wxTextCtrlBase::LoadFile(file) )
 709     {
 710         // update the size limit if needed
 711         AdjustSpaceLimit();
 712
 713         return TRUE;
 714     }
 715
 716     return FALSE;
 717 }
 718
 719 bool wxTextCtrl::IsModified() const
 720 {
 721     return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
 722 }
 723
 724 // Makes 'unmodified'
 725 void wxTextCtrl::DiscardEdits()
 726 {
 727     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 728 }
 729
 730 int wxTextCtrl::GetNumberOfLines() const
 731 {
 732     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 733 }
 734
 735 long wxTextCtrl::XYToPosition(long x, long y) const
 736 {
 737     HWND hWnd = GetHwnd();
 738
 739     // This gets the char index for the _beginning_ of this line
 740     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 741     return (long)(x + charIndex);
 742 }
 743
 744 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 745 {
 746     HWND hWnd = GetHwnd();
 747
 748     // This gets the line number containing the character
 749     int lineNo;
 750 #if wxUSE_RICHEDIT
 751     if ( m_isRich )
 752     {
 753         lineNo = (int)SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
 754     }
 755     else
 756 #endif // wxUSE_RICHEDIT
 757         lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
 758
 759     if ( lineNo == -1 )
 760     {
 761         // no such line
 762         return FALSE;
 763     }
 764
 765     // This gets the char index for the _beginning_ of this line
 766     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 767     if ( charIndex == -1 )
 768     {
 769         return FALSE;
 770     }
 771
 772     // The X position must therefore be the different between pos and charIndex
 773     if ( x )
 774         *x = (long)(pos - charIndex);
 775     if ( y )
 776         *y = (long)lineNo;
 777
 778     return TRUE;
 779 }
 780
 781 void wxTextCtrl::ShowPosition(long pos)
 782 {
 783     HWND hWnd = GetHwnd();
 784
 785     // To scroll to a position, we pass the number of lines and characters
 786     // to scroll *by*. This means that we need to:
 787     // (1) Find the line position of the current line.
 788     // (2) Find the line position of pos.
 789     // (3) Scroll by (pos - current).
 790     // For now, ignore the horizontal scrolling.
 791
 792     // Is this where scrolling is relative to - the line containing the caret?
 793     // Or is the first visible line??? Try first visible line.
 794 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 795
 796     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 797
 798     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 799
 800     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 801
 802     if (linesToScroll != 0)
 803       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 804 }
 805
 806 int wxTextCtrl::GetLineLength(long lineNo) const
 807 {
 808     long charIndex = XYToPosition(0, lineNo);
 809     int len = (int)SendMessage(GetHwnd(), EM_LINELENGTH, charIndex, 0);
 810     return len;
 811 }
 812
 813 wxString wxTextCtrl::GetLineText(long lineNo) const
 814 {
 815     size_t len = (size_t)GetLineLength(lineNo) + 1;
 816
 817     // there must be at least enough place for the length WORD in the
 818     // buffer
 819     len += sizeof(WORD);
 820
 821     wxString str;
 822     wxChar *buf = str.GetWriteBuf(len);
 823
 824     *(WORD *)buf = (WORD)len;
 825     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
 826     buf[len] = 0;
 827
 828     str.UngetWriteBuf(len);
 829
 830     return str;
 831 }
 832
 833 void wxTextCtrl::SetMaxLength(unsigned long len)
 834 {
 835     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
 836 }
 837
 838 // ----------------------------------------------------------------------------
 839 // Undo/redo
 840 // ----------------------------------------------------------------------------
 841
 842 void wxTextCtrl::Undo()
 843 {
 844     if (CanUndo())
 845     {
 846         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 847     }
 848 }
 849
 850 void wxTextCtrl::Redo()
 851 {
 852     if (CanRedo())
 853     {
 854         // Same as Undo, since Undo undoes the undo, i.e. a redo.
 855         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 856     }
 857 }
 858
 859 bool wxTextCtrl::CanUndo() const
 860 {
 861     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 862 }
 863
 864 bool wxTextCtrl::CanRedo() const
 865 {
 866     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 867 }
 868
 869 // ----------------------------------------------------------------------------
 870 // implemenation details
 871 // ----------------------------------------------------------------------------
 872
 873 void wxTextCtrl::Command(wxCommandEvent & event)
 874 {
 875     SetValue(event.GetString());
 876     ProcessCommand (event);
 877 }
 878
 879 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 880 {
 881     // By default, load the first file into the text window.
 882     if (event.GetNumberOfFiles() > 0)
 883     {
 884         LoadFile(event.GetFiles()[0]);
 885     }
 886 }
 887
 888 // ----------------------------------------------------------------------------
 889 // kbd input processing
 890 // ----------------------------------------------------------------------------
 891
 892 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
 893 {
 894     MSG *msg = (MSG *)pMsg;
 895
 896     // check for our special keys here: if we don't do it and the parent frame
 897     // uses them as accelerators, they wouldn't work at all, so we disable
 898     // usual preprocessing for them
 899     if ( msg->message == WM_KEYDOWN )
 900     {
 901         WORD vkey = msg->wParam;
 902         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
 903         {
 904             if ( vkey == VK_BACK )
 905                 return FALSE;
 906         }
 907         else // no Alt
 908         {
 909             if ( wxIsCtrlDown() )
 910             {
 911                 switch ( vkey )
 912                 {
 913                     case 'C':
 914                     case 'V':
 915                     case 'X':
 916                     case VK_INSERT:
 917                     case VK_DELETE:
 918                     case VK_HOME:
 919                     case VK_END:
 920                         return FALSE;
 921                 }
 922             }
 923             else if ( wxIsShiftDown() )
 924             {
 925                 if ( vkey == VK_INSERT || vkey == VK_DELETE )
 926                     return FALSE;
 927             }
 928         }
 929     }
 930
 931     return wxControl::MSWShouldPreProcessMessage(pMsg);
 932 }
 933
 934 void wxTextCtrl::OnChar(wxKeyEvent& event)
 935 {
 936     switch ( event.KeyCode() )
 937     {
 938         case WXK_RETURN:
 939             if ( !(m_windowStyle & wxTE_MULTILINE) )
 940             {
 941                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 942                 InitCommandEvent(event);
 943                 event.SetString(GetValue());
 944                 if ( GetEventHandler()->ProcessEvent(event) )
 945                     return;
 946             }
 947             //else: multiline controls need Enter for themselves
 948
 949             break;
 950
 951         case WXK_TAB:
 952             // always produce navigation event - even if we process TAB
 953             // ourselves the fact that we got here means that the user code
 954             // decided to skip processing of this TAB - probably to let it
 955             // do its default job.
 956             {
 957                 wxNavigationKeyEvent eventNav;
 958                 eventNav.SetDirection(!event.ShiftDown());
 959                 eventNav.SetWindowChange(event.ControlDown());
 960                 eventNav.SetEventObject(this);
 961
 962                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
 963                     return;
 964             }
 965             break;
 966     }
 967
 968     // no, we didn't process it
 969     event.Skip();
 970 }
 971
 972 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 973 {
 974     switch (param)
 975     {
 976         case EN_SETFOCUS:
 977         case EN_KILLFOCUS:
 978             {
 979                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
 980                                                          : wxEVT_SET_FOCUS,
 981                                    m_windowId);
 982                 event.SetEventObject( this );
 983                 GetEventHandler()->ProcessEvent(event);
 984             }
 985             break;
 986
 987         case EN_CHANGE:
 988             {
 989                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
 990                 InitCommandEvent(event);
 991                 event.SetString(GetValue());
 992                 ProcessCommand(event);
 993             }
 994             break;
 995
 996         case EN_MAXTEXT:
 997             // the text size limit has been hit - increase it
 998             if ( !AdjustSpaceLimit() )
 999             {
1000                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1001                 InitCommandEvent(event);
1002                 event.SetString(GetValue());
1003                 ProcessCommand(event);
1004             }
1005             break;
1006
1007             // the other notification messages are not processed
1008         case EN_UPDATE:
1009         case EN_ERRSPACE:
1010         case EN_HSCROLL:
1011         case EN_VSCROLL:
1012             return FALSE;
1013         default:
1014             return FALSE;
1015     }
1016
1017     // processed
1018     return TRUE;
1019 }
1020
1021 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1022 #if wxUSE_CTL3D
1023                                WXUINT message,
1024                                WXWPARAM wParam,
1025                                WXLPARAM lParam
1026 #else
1027                                WXUINT WXUNUSED(message),
1028                                WXWPARAM WXUNUSED(wParam),
1029                                WXLPARAM WXUNUSED(lParam)
1030 #endif
1031     )
1032 {
1033 #if wxUSE_CTL3D
1034     if ( m_useCtl3D )
1035     {
1036         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1037         return (WXHBRUSH) hbrush;
1038     }
1039 #endif // wxUSE_CTL3D
1040
1041     HDC hdc = (HDC)pDC;
1042     if (GetParent()->GetTransparentBackground())
1043         SetBkMode(hdc, TRANSPARENT);
1044     else
1045         SetBkMode(hdc, OPAQUE);
1046
1047     wxColour colBack = GetBackgroundColour();
1048
1049     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1050         colBack = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
1051
1052     ::SetBkColor(hdc, wxColourToRGB(colBack));
1053     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1054
1055     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1056
1057     return (WXHBRUSH)brush->GetResourceHandle();
1058 }
1059
1060 // In WIN16, need to override normal erasing because
1061 // Ctl3D doesn't use the wxWindows background colour.
1062 #ifdef __WIN16__
1063 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1064 {
1065     wxColour col(m_backgroundColour);
1066
1067 #if wxUSE_CTL3D
1068     if (m_useCtl3D)
1069         col = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
1070 #endif
1071
1072     RECT rect;
1073     ::GetClientRect(GetHwnd(), &rect);
1074
1075     COLORREF ref = PALETTERGB(col.Red(),
1076                               col.Green(),
1077                               col.Blue());
1078     HBRUSH hBrush = ::CreateSolidBrush(ref);
1079     if ( !hBrush )
1080         wxLogLastError(wxT("CreateSolidBrush"));
1081
1082     HDC hdc = (HDC)event.GetDC()->GetHDC();
1083
1084     int mode = ::SetMapMode(hdc, MM_TEXT);
1085
1086     ::FillRect(hdc, &rect, hBrush);
1087     ::DeleteObject(hBrush);
1088     ::SetMapMode(hdc, mode);
1089
1090 }
1091 #endif
1092
1093 bool wxTextCtrl::AdjustSpaceLimit()
1094 {
1095 #ifndef __WIN16__
1096     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1097
1098     // HACK: we try to automatically extend the limit for the amount of text
1099     //       to allow (interactively) entering more than 64Kb of text under
1100     //       Win9x but we shouldn't reset the text limit which was previously
1101     //       set explicitly with SetMaxLength()
1102     //
1103     //       we could solve this by storing the limit we set in wxTextCtrl but
1104     //       to save space we prefer to simply test here the actual limit
1105     //       value: we consider that SetMaxLength() can only be called for
1106     //       values < 32Kb
1107     if ( limit < 0x8000 )
1108     {
1109         // we've got more text than limit set by SetMaxLength()
1110         return FALSE;
1111     }
1112
1113     unsigned int len = ::GetWindowTextLength(GetHwnd());
1114     if ( len >= limit )
1115     {
1116         limit = len + 0x8000;    // 32Kb
1117
1118 #if wxUSE_RICHEDIT
1119         if ( m_isRich )
1120         {
1121             // as a nice side effect, this also allows passing limit > 64Kb
1122             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1123         }
1124         else
1125 #endif // wxUSE_RICHEDIT
1126         {
1127             if ( limit > 0xffff )
1128             {
1129                 // this will set it to a platform-dependent maximum (much more
1130                 // than 64Kb under NT)
1131                 limit = 0;
1132             }
1133
1134             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1135         }
1136     }
1137 #endif // !Win16
1138
1139     // we changed the limit
1140     return TRUE;
1141 }
1142
1143 bool wxTextCtrl::AcceptsFocus() const
1144 {
1145     // we don't want focus if we can't be edited
1146     return IsEditable() && wxControl::AcceptsFocus();
1147 }
1148
1149 wxSize wxTextCtrl::DoGetBestSize() const
1150 {
1151     int cx, cy;
1152     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1153
1154     int wText = DEFAULT_ITEM_WIDTH;
1155
1156     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1157     if ( m_windowStyle & wxTE_MULTILINE )
1158     {
1159         hText *= wxMax(GetNumberOfLines(), 5);
1160     }
1161     //else: for single line control everything is ok
1162
1163     return wxSize(wText, hText);
1164 }
1165
1166 // ----------------------------------------------------------------------------
1167 // standard handlers for standard edit menu events
1168 // ----------------------------------------------------------------------------
1169
1170 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1171 {
1172     Cut();
1173 }
1174
1175 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1176 {
1177     Copy();
1178 }
1179
1180 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1181 {
1182     Paste();
1183 }
1184
1185 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1186 {
1187     Undo();
1188 }
1189
1190 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1191 {
1192     Redo();
1193 }
1194
1195 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1196 {
1197     event.Enable( CanCut() );
1198 }
1199
1200 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1201 {
1202     event.Enable( CanCopy() );
1203 }
1204
1205 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1206 {
1207     event.Enable( CanPaste() );
1208 }
1209
1210 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1211 {
1212     event.Enable( CanUndo() );
1213 }
1214
1215 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1216 {
1217     event.Enable( CanRedo() );
1218 }
1219
1220 // the rest of the file only deals with the rich edit controls
1221 #if wxUSE_RICHEDIT
1222
1223 // ----------------------------------------------------------------------------
1224 // EN_LINK processing
1225 // ----------------------------------------------------------------------------
1226
1227 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1228 {
1229     NMHDR *hdr = (NMHDR* )lParam;
1230     if ( hdr->code == EN_LINK )
1231     {
1232         ENLINK *enlink = (ENLINK *)hdr;
1233
1234         switch ( enlink->msg )
1235         {
1236             case WM_SETCURSOR:
1237                 // ok, so it is hardcoded - do we really nee to customize it?
1238                 ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1239                 *result = TRUE;
1240                 break;
1241
1242             case WM_MOUSEMOVE:
1243             case WM_LBUTTONDOWN:
1244             case WM_LBUTTONUP:
1245             case WM_LBUTTONDBLCLK:
1246             case WM_RBUTTONDOWN:
1247             case WM_RBUTTONUP:
1248             case WM_RBUTTONDBLCLK:
1249                 // send a mouse event
1250                 {
1251                     static const wxEventType eventsMouse[] =
1252                     {
1253                         wxEVT_MOTION,
1254                         wxEVT_LEFT_DOWN,
1255                         wxEVT_LEFT_UP,
1256                         wxEVT_LEFT_DCLICK,
1257                         wxEVT_RIGHT_DOWN,
1258                         wxEVT_RIGHT_UP,
1259                         wxEVT_RIGHT_DCLICK,
1260                     };
1261
1262                     // the event ids are consecutive
1263                     wxMouseEvent
1264                         evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1265
1266                     InitMouseEvent(evtMouse,
1267                                    GET_X_LPARAM(enlink->lParam),
1268                                    GET_Y_LPARAM(enlink->lParam),
1269                                    enlink->wParam);
1270
1271                     wxTextUrlEvent event(m_windowId, evtMouse,
1272                                          enlink->chrg.cpMin,
1273                                          enlink->chrg.cpMax);
1274
1275                     InitCommandEvent(event);
1276
1277                     *result = ProcessCommand(event);
1278                 }
1279                 break;
1280         }
1281
1282         return TRUE;
1283     }
1284
1285     // not processed
1286     return FALSE;
1287 }
1288
1289 // ----------------------------------------------------------------------------
1290 // colour setting for the rich edit controls
1291 // ----------------------------------------------------------------------------
1292
1293 // Watcom C++ doesn't define this
1294 #ifndef SCF_ALL
1295 #define SCF_ALL 0x0004
1296 #endif
1297
1298 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1299 {
1300     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1301     {
1302         // colour didn't really change
1303         return FALSE;
1304     }
1305
1306     if ( IsRich() )
1307     {
1308         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1309         // EM_SETBKGNDCOLOR additionally
1310         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1311     }
1312
1313     return TRUE;
1314 }
1315
1316 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1317 {
1318     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1319     {
1320         // colour didn't really change
1321         return FALSE;
1322     }
1323
1324     if ( IsRich() )
1325     {
1326         // change the colour of everything
1327         CHARFORMAT cf;
1328         wxZeroMemory(cf);
1329         cf.cbSize = sizeof(cf);
1330         cf.dwMask = CFM_COLOR;
1331         cf.crTextColor = wxColourToRGB(colour);
1332         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1333     }
1334
1335     return TRUE;
1336 }
1337
1338 // ----------------------------------------------------------------------------
1339 // styling support for rich edit controls
1340 // ----------------------------------------------------------------------------
1341
1342 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1343 {
1344     if ( !IsRich() )
1345     {
1346         // can't do it with normal text control
1347         return FALSE;
1348     }
1349
1350     // the rich text control doesn't handle setting background colour, so don't
1351     // even try if it's the only thing we want to change
1352     if ( wxRichEditModule::GetLoadedVersion() < 2 &&
1353          !style.HasFont() && !style.HasTextColour() )
1354     {
1355         // nothing to do: return TRUE if there was really nothing to do and
1356         // FALSE if we failed to set bg colour
1357         return !style.HasBackgroundColour();
1358     }
1359
1360     // order the range if needed
1361     if ( start > end )
1362     {
1363         long tmp = start;
1364         start = end;
1365         end = tmp;
1366     }
1367
1368     // we can only change the format of the selection, so select the range we
1369     // want and restore the old selection later
1370     long startOld, endOld;
1371     GetSelection(&startOld, &endOld);
1372
1373     // but do we really have to change the selection?
1374     bool changeSel = start != startOld || end != endOld;
1375
1376     if ( changeSel )
1377         SendMessage(GetHwnd(), EM_SETSEL, (WPARAM) start, (LPARAM) end);
1378
1379     // initialize CHARFORMAT struct
1380 #if wxUSE_RICHEDIT2
1381     CHARFORMAT2 cf;
1382 #else
1383     CHARFORMAT cf;
1384 #endif
1385     wxZeroMemory(cf);
1386     cf.cbSize = sizeof(cf);
1387
1388     if ( style.HasFont() )
1389     {
1390         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1391                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1392
1393         // fill in data from LOGFONT but recalculate lfHeight because we need
1394         // the real height in twips and not the negative number which
1395         // wxFillLogFont() returns (this is correct in general and works with
1396         // the Windows font mapper, but not here)
1397         LOGFONT lf;
1398         wxFillLogFont(&lf, &style.GetFont());
1399         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1400         cf.bCharSet = lf.lfCharSet;
1401         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1402         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1403
1404         // also deal with underline/italic/bold attributes: note that we must
1405         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1406         // style to allow clearing it
1407         if ( lf.lfItalic )
1408         {
1409             cf.dwEffects |= CFE_ITALIC;
1410         }
1411
1412         if ( lf.lfWeight == FW_BOLD )
1413         {
1414             cf.dwEffects |= CFE_BOLD;
1415         }
1416
1417         if ( lf.lfUnderline )
1418         {
1419             cf.dwEffects |= CFE_UNDERLINE;
1420         }
1421
1422         // strikeout fonts are not supported by wxWindows
1423     }
1424
1425     if ( style.HasTextColour() )
1426     {
1427         cf.dwMask |= CFM_COLOR;
1428         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1429     }
1430
1431 #if wxUSE_RICHEDIT2
1432     if ( wxRichEditModule::GetLoadedVersion() > 1 && style.HasBackgroundColour() )
1433     {
1434         cf.dwMask |= CFM_BACKCOLOR;
1435         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1436     }
1437 #endif // wxUSE_RICHEDIT2
1438
1439     // do format the selection
1440     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1441                             SCF_SELECTION, (LPARAM)&cf) != 0;
1442     if ( !ok )
1443     {
1444         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1445     }
1446
1447     if ( changeSel )
1448     {
1449         // restore the original selection
1450         SendMessage(GetHwnd(), EM_SETSEL, (WPARAM)startOld, (LPARAM)endOld);
1451     }
1452
1453     return ok;
1454 }
1455
1456 // ----------------------------------------------------------------------------
1457 // wxRichEditModule
1458 // ----------------------------------------------------------------------------
1459
1460 bool wxRichEditModule::OnInit()
1461 {
1462     // don't do anything - we will load it when needed
1463     return TRUE;
1464 }
1465
1466 void wxRichEditModule::OnExit()
1467 {
1468     if ( ms_hRichEdit )
1469     {
1470         FreeLibrary(ms_hRichEdit);
1471     }
1472 }
1473
1474 /* static */
1475 bool wxRichEditModule::Load(int version)
1476 {
1477     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1478                  _T("incorrect richedit control version requested") );
1479
1480     if ( version <= ms_verRichEdit )
1481     {
1482         // we've already got this or better
1483         return TRUE;
1484     }
1485
1486     if ( ms_hRichEdit )
1487     {
1488         ::FreeLibrary(ms_hRichEdit);
1489     }
1490
1491     // always try load riched20.dll first - like this we won't have to reload
1492     // it later if we're first asked for RE 1 and then for RE 2 or 3
1493     wxString dllname = _T("riched20.dll");
1494     ms_hRichEdit = ::LoadLibrary(dllname);
1495     ms_verRichEdit = 2; // no way to tell if it's 2 or 3, assume 2
1496
1497     if ( !ms_hRichEdit && (version == 1) )
1498     {
1499         // fall back to RE 1
1500         dllname = _T("riched32.dll");
1501         ms_hRichEdit = ::LoadLibrary(dllname);
1502         ms_verRichEdit = 1;
1503     }
1504
1505     if ( !ms_hRichEdit )
1506     {
1507         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1508
1509         ms_verRichEdit = -1;
1510
1511         return FALSE;
1512     }
1513
1514     return TRUE;
1515 }
1516
1517 #endif // wxUSE_RICHEDIT
1518
1519 #endif // wxUSE_TEXTCTRL