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     // we need to turn '\n's into "\r\n"s for the multiline controls
 301     wxString valueWin;
 302     if ( m_windowStyle & wxTE_MULTILINE )
 303     {
 304         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 305     }
 306     else // single line
 307     {
 308         valueWin = value;
 309     }
 310
 311     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 312         return FALSE;
 313
 314     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 315
 316 #if wxUSE_RICHEDIT
 317     if (m_isRich)
 318     {
 319         // have to enable events manually
 320         LPARAM mask = ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE;
 321
 322         if ( m_windowStyle & wxTE_AUTO_URL )
 323         {
 324             mask |= ENM_LINK;
 325
 326             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 327         }
 328
 329         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 330     }
 331 #endif // wxUSE_RICHEDIT
 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 // ----------------------------------------------------------------------------
 367 // set/get the controls text
 368 // ----------------------------------------------------------------------------
 369
 370 wxString wxTextCtrl::GetValue() const
 371 {
 372     // we can't use wxGetWindowText() (i.e. WM_GETTEXT internally) for
 373     // retrieving more than 64Kb under Win9x
 374 #if wxUSE_RICHEDIT
 375     if ( m_isRich )
 376     {
 377         wxString str;
 378
 379         int len = GetWindowTextLength(GetHwnd());
 380         if ( len )
 381         {
 382             // alloc one extra WORD as needed by the control
 383             wxChar *p = str.GetWriteBuf(++len);
 384
 385             TEXTRANGE textRange;
 386             textRange.chrg.cpMin = 0;
 387             textRange.chrg.cpMax = -1;
 388             textRange.lpstrText = p;
 389
 390             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 391
 392             // believe it or not, but EM_GETTEXTRANGE uses just CR ('\r') for
 393             // the newlines which is neither Unix nor Windows style (Win95 with
 394             // riched20.dll shows this behaviour) - convert it to something
 395             // reasonable
 396             for ( ; *p; p++ )
 397             {
 398                 if ( *p == _T('\r') )
 399                     *p = _T('\n');
 400             }
 401
 402             str.UngetWriteBuf();
 403         }
 404         //else: no text at all, leave the string empty
 405
 406         return str;
 407     }
 408 #endif // wxUSE_RICHEDIT
 409
 410     // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 411     // same one as above for consitency
 412     wxString str = wxGetWindowText(GetHWND());
 413
 414     return wxTextFile::Translate(str, wxTextFileType_Unix);
 415 }
 416
 417 void wxTextCtrl::SetValue(const wxString& value)
 418 {
 419     // if the text is long enough, it's faster to just set it instead of first
 420     // comparing it with the old one (chances are that it will be different
 421     // anyhow, this comparison is there to avoid flicker for small single-line
 422     // edit controls mostly)
 423     if ( (value.length() > 0x400) || (value != GetValue()) )
 424     {
 425         wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 426
 427         SetWindowText(GetHwnd(), valueDos.c_str());
 428
 429         // for compatibility with the GTK and because it is more logical, we
 430         // move the cursor to the end of the text after SetValue()
 431
 432         // GRG, Jun/2000: Changed this back after a lot of discussion
 433         //   in the lists. wxWindows 2.2 will have a set of flags to
 434         //   customize this behaviour.
 435         //SetInsertionPointEnd();
 436
 437         AdjustSpaceLimit();
 438     }
 439 }
 440
 441 void wxTextCtrl::WriteText(const wxString& value)
 442 {
 443     wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 444
 445 #if wxUSE_RICHEDIT
 446     // ensure that the new text will be in the default style
 447     if ( IsRich() &&
 448             (m_defaultStyle.HasFont() || m_defaultStyle.HasTextColour()) )
 449     {
 450         long start, end;
 451         GetSelection(&start, &end);
 452         SetStyle(start, end, m_defaultStyle );
 453     }
 454 #endif // wxUSE_RICHEDIT
 455
 456     SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
 457
 458     AdjustSpaceLimit();
 459 }
 460
 461 void wxTextCtrl::AppendText(const wxString& text)
 462 {
 463     SetInsertionPointEnd();
 464     WriteText(text);
 465 }
 466
 467 void wxTextCtrl::Clear()
 468 {
 469     SetWindowText(GetHwnd(), wxT(""));
 470 }
 471
 472 // ----------------------------------------------------------------------------
 473 // Clipboard operations
 474 // ----------------------------------------------------------------------------
 475
 476 void wxTextCtrl::Copy()
 477 {
 478     if (CanCopy())
 479     {
 480         HWND hWnd = GetHwnd();
 481         SendMessage(hWnd, WM_COPY, 0, 0L);
 482     }
 483 }
 484
 485 void wxTextCtrl::Cut()
 486 {
 487     if (CanCut())
 488     {
 489         HWND hWnd = GetHwnd();
 490         SendMessage(hWnd, WM_CUT, 0, 0L);
 491     }
 492 }
 493
 494 void wxTextCtrl::Paste()
 495 {
 496     if (CanPaste())
 497     {
 498         HWND hWnd = GetHwnd();
 499         SendMessage(hWnd, WM_PASTE, 0, 0L);
 500     }
 501 }
 502
 503 bool wxTextCtrl::CanCopy() const
 504 {
 505     // Can copy if there's a selection
 506     long from, to;
 507     GetSelection(& from, & to);
 508     return (from != to) ;
 509 }
 510
 511 bool wxTextCtrl::CanCut() const
 512 {
 513     // Can cut if there's a selection
 514     long from, to;
 515     GetSelection(& from, & to);
 516     return (from != to) && (IsEditable());
 517 }
 518
 519 bool wxTextCtrl::CanPaste() const
 520 {
 521 #if wxUSE_RICHEDIT
 522     if (m_isRich)
 523     {
 524         int dataFormat = 0; // 0 == any format
 525         return (::SendMessage( GetHwnd(), EM_CANPASTE, (WPARAM) (UINT) dataFormat, 0) != 0);
 526     }
 527 #endif
 528     if (!IsEditable())
 529         return FALSE;
 530
 531     // Standard edit control: check for straight text on clipboard
 532     bool isTextAvailable = FALSE;
 533     if ( ::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 534     {
 535         isTextAvailable = (::IsClipboardFormatAvailable(CF_TEXT) != 0);
 536         ::CloseClipboard();
 537     }
 538
 539     return isTextAvailable;
 540 }
 541
 542 // ----------------------------------------------------------------------------
 543 // Accessors
 544 // ----------------------------------------------------------------------------
 545
 546 void wxTextCtrl::SetEditable(bool editable)
 547 {
 548     HWND hWnd = GetHwnd();
 549     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 550 }
 551
 552 void wxTextCtrl::SetInsertionPoint(long pos)
 553 {
 554     HWND hWnd = GetHwnd();
 555 #ifdef __WIN32__
 556 #if wxUSE_RICHEDIT
 557     if ( m_isRich)
 558     {
 559         CHARRANGE range;
 560         range.cpMin = pos;
 561         range.cpMax = pos;
 562         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 563         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 564     }
 565     else
 566 #endif // wxUSE_RICHEDIT
 567     {
 568         SendMessage(hWnd, EM_SETSEL, pos, pos);
 569         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 570     }
 571 #else // Win16
 572     SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 573 #endif // Win32/16
 574
 575 #if wxUSE_RICHEDIT
 576     if ( !m_isRich)
 577 #endif
 578     {
 579         static const wxChar *nothing = _T("");
 580         SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 581     }
 582 }
 583
 584 void wxTextCtrl::SetInsertionPointEnd()
 585 {
 586     long pos = GetLastPosition();
 587     SetInsertionPoint(pos);
 588 }
 589
 590 long wxTextCtrl::GetInsertionPoint() const
 591 {
 592 #if wxUSE_RICHEDIT
 593     if (m_isRich)
 594     {
 595         CHARRANGE range;
 596         range.cpMin = 0;
 597         range.cpMax = 0;
 598         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 599         return range.cpMin;
 600     }
 601 #endif
 602
 603     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 604     return Pos & 0xFFFF;
 605 }
 606
 607 long wxTextCtrl::GetLastPosition() const
 608 {
 609     HWND hWnd = GetHwnd();
 610
 611     // Will always return a number > 0 (according to docs)
 612     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 613
 614     // This gets the char index for the _beginning_ of the last line
 615     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 616
 617     // Get number of characters in the last line. We'll add this to the character
 618     // index for the last line, 1st position.
 619     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 620
 621     return (long)(charIndex + lineLength);
 622 }
 623
 624 // If the return values from and to are the same, there is no
 625 // selection.
 626 void wxTextCtrl::GetSelection(long* from, long* to) const
 627 {
 628 #if wxUSE_RICHEDIT
 629     if (m_isRich)
 630     {
 631         CHARRANGE charRange;
 632         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) (CHARRANGE*) & charRange);
 633
 634         *from = charRange.cpMin;
 635         *to = charRange.cpMax;
 636     }
 637     else
 638 #endif // rich/!rich
 639     {
 640         DWORD dwStart, dwEnd;
 641         WPARAM wParam = (WPARAM) &dwStart; // receives starting position
 642         LPARAM lParam = (LPARAM) &dwEnd;   // receives ending position
 643
 644         ::SendMessage(GetHwnd(), EM_GETSEL, wParam, lParam);
 645
 646         *from = dwStart;
 647         *to = dwEnd;
 648     }
 649 }
 650
 651 bool wxTextCtrl::IsEditable() const
 652 {
 653     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 654
 655     return ((style & ES_READONLY) == 0);
 656 }
 657
 658 // ----------------------------------------------------------------------------
 659 // Editing
 660 // ----------------------------------------------------------------------------
 661
 662 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 663 {
 664     HWND hWnd = GetHwnd();
 665     long fromChar = from;
 666     long toChar = to;
 667
 668     // Set selection and remove it
 669 #ifdef __WIN32__
 670     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 671     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)TRUE, (LPARAM)value.c_str());
 672 #else
 673     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 674     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)0, (LPARAM)value.c_str());
 675 #endif
 676 }
 677
 678 void wxTextCtrl::Remove(long from, long to)
 679 {
 680     HWND hWnd = GetHwnd();
 681     long fromChar = from;
 682     long toChar = to;
 683
 684     // Cut all selected text
 685 #ifdef __WIN32__
 686     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 687     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)TRUE, (LPARAM)"");
 688 #else
 689     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 690     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)0, (LPARAM)"");
 691 #endif
 692 }
 693
 694 void wxTextCtrl::SetSelection(long from, long to)
 695 {
 696     HWND hWnd = GetHwnd();
 697     long fromChar = from;
 698     long toChar = to;
 699
 700     // if from and to are both -1, it means (in wxWindows) that all text should
 701     // be selected. Translate into Windows convention
 702     if ((from == -1) && (to == -1))
 703     {
 704       fromChar = 0;
 705       toChar = -1;
 706     }
 707
 708 #ifdef __WIN32__
 709     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 710     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 711 #else
 712     // WPARAM is 0: selection is scrolled into view
 713     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 714 #endif
 715 }
 716
 717 bool wxTextCtrl::LoadFile(const wxString& file)
 718 {
 719     if ( wxTextCtrlBase::LoadFile(file) )
 720     {
 721         // update the size limit if needed
 722         AdjustSpaceLimit();
 723
 724         return TRUE;
 725     }
 726
 727     return FALSE;
 728 }
 729
 730 bool wxTextCtrl::IsModified() const
 731 {
 732     return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
 733 }
 734
 735 // Makes 'unmodified'
 736 void wxTextCtrl::DiscardEdits()
 737 {
 738     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 739 }
 740
 741 int wxTextCtrl::GetNumberOfLines() const
 742 {
 743     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 744 }
 745
 746 long wxTextCtrl::XYToPosition(long x, long y) const
 747 {
 748     HWND hWnd = GetHwnd();
 749
 750     // This gets the char index for the _beginning_ of this line
 751     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 752     return (long)(x + charIndex);
 753 }
 754
 755 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 756 {
 757     HWND hWnd = GetHwnd();
 758
 759     // This gets the line number containing the character
 760     int lineNo;
 761 #if wxUSE_RICHEDIT
 762     if ( m_isRich )
 763     {
 764         lineNo = (int)SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
 765     }
 766     else
 767 #endif // wxUSE_RICHEDIT
 768         lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
 769
 770     if ( lineNo == -1 )
 771     {
 772         // no such line
 773         return FALSE;
 774     }
 775
 776     // This gets the char index for the _beginning_ of this line
 777     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 778     if ( charIndex == -1 )
 779     {
 780         return FALSE;
 781     }
 782
 783     // The X position must therefore be the different between pos and charIndex
 784     if ( x )
 785         *x = (long)(pos - charIndex);
 786     if ( y )
 787         *y = (long)lineNo;
 788
 789     return TRUE;
 790 }
 791
 792 void wxTextCtrl::ShowPosition(long pos)
 793 {
 794     HWND hWnd = GetHwnd();
 795
 796     // To scroll to a position, we pass the number of lines and characters
 797     // to scroll *by*. This means that we need to:
 798     // (1) Find the line position of the current line.
 799     // (2) Find the line position of pos.
 800     // (3) Scroll by (pos - current).
 801     // For now, ignore the horizontal scrolling.
 802
 803     // Is this where scrolling is relative to - the line containing the caret?
 804     // Or is the first visible line??? Try first visible line.
 805 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 806
 807     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 808
 809     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 810
 811     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 812
 813     if (linesToScroll != 0)
 814       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 815 }
 816
 817 int wxTextCtrl::GetLineLength(long lineNo) const
 818 {
 819     long charIndex = XYToPosition(0, lineNo);
 820     int len = (int)SendMessage(GetHwnd(), EM_LINELENGTH, charIndex, 0);
 821     return len;
 822 }
 823
 824 wxString wxTextCtrl::GetLineText(long lineNo) const
 825 {
 826     size_t len = (size_t)GetLineLength(lineNo) + 1;
 827
 828     // there must be at least enough place for the length WORD in the
 829     // buffer
 830     len += sizeof(WORD);
 831
 832     wxString str;
 833     wxChar *buf = str.GetWriteBuf(len);
 834
 835     *(WORD *)buf = (WORD)len;
 836     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
 837     buf[len] = 0;
 838
 839     str.UngetWriteBuf(len);
 840
 841     return str;
 842 }
 843
 844 void wxTextCtrl::SetMaxLength(unsigned long len)
 845 {
 846     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
 847 }
 848
 849 // ----------------------------------------------------------------------------
 850 // Undo/redo
 851 // ----------------------------------------------------------------------------
 852
 853 void wxTextCtrl::Undo()
 854 {
 855     if (CanUndo())
 856     {
 857         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 858     }
 859 }
 860
 861 void wxTextCtrl::Redo()
 862 {
 863     if (CanRedo())
 864     {
 865         // Same as Undo, since Undo undoes the undo, i.e. a redo.
 866         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 867     }
 868 }
 869
 870 bool wxTextCtrl::CanUndo() const
 871 {
 872     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 873 }
 874
 875 bool wxTextCtrl::CanRedo() const
 876 {
 877     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 878 }
 879
 880 // ----------------------------------------------------------------------------
 881 // implemenation details
 882 // ----------------------------------------------------------------------------
 883
 884 void wxTextCtrl::Command(wxCommandEvent & event)
 885 {
 886     SetValue(event.GetString());
 887     ProcessCommand (event);
 888 }
 889
 890 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 891 {
 892     // By default, load the first file into the text window.
 893     if (event.GetNumberOfFiles() > 0)
 894     {
 895         LoadFile(event.GetFiles()[0]);
 896     }
 897 }
 898
 899 // ----------------------------------------------------------------------------
 900 // kbd input processing
 901 // ----------------------------------------------------------------------------
 902
 903 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
 904 {
 905     MSG *msg = (MSG *)pMsg;
 906
 907     // check for our special keys here: if we don't do it and the parent frame
 908     // uses them as accelerators, they wouldn't work at all, so we disable
 909     // usual preprocessing for them
 910     if ( msg->message == WM_KEYDOWN )
 911     {
 912         WORD vkey = msg->wParam;
 913         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
 914         {
 915             if ( vkey == VK_BACK )
 916                 return FALSE;
 917         }
 918         else // no Alt
 919         {
 920             if ( wxIsCtrlDown() )
 921             {
 922                 switch ( vkey )
 923                 {
 924                     case 'C':
 925                     case 'V':
 926                     case 'X':
 927                     case VK_INSERT:
 928                     case VK_DELETE:
 929                     case VK_HOME:
 930                     case VK_END:
 931                         return FALSE;
 932                 }
 933             }
 934             else if ( wxIsShiftDown() )
 935             {
 936                 if ( vkey == VK_INSERT || vkey == VK_DELETE )
 937                     return FALSE;
 938             }
 939         }
 940     }
 941
 942     return wxControl::MSWShouldPreProcessMessage(pMsg);
 943 }
 944
 945 void wxTextCtrl::OnChar(wxKeyEvent& event)
 946 {
 947     switch ( event.KeyCode() )
 948     {
 949         case WXK_RETURN:
 950             if ( !(m_windowStyle & wxTE_MULTILINE) )
 951             {
 952                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 953                 InitCommandEvent(event);
 954                 event.SetString(GetValue());
 955                 if ( GetEventHandler()->ProcessEvent(event) )
 956                     return;
 957             }
 958             //else: multiline controls need Enter for themselves
 959
 960             break;
 961
 962         case WXK_TAB:
 963             // always produce navigation event - even if we process TAB
 964             // ourselves the fact that we got here means that the user code
 965             // decided to skip processing of this TAB - probably to let it
 966             // do its default job.
 967             {
 968                 wxNavigationKeyEvent eventNav;
 969                 eventNav.SetDirection(!event.ShiftDown());
 970                 eventNav.SetWindowChange(event.ControlDown());
 971                 eventNav.SetEventObject(this);
 972
 973                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
 974                     return;
 975             }
 976             break;
 977     }
 978
 979     // no, we didn't process it
 980     event.Skip();
 981 }
 982
 983 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 984 {
 985     switch (param)
 986     {
 987         case EN_SETFOCUS:
 988         case EN_KILLFOCUS:
 989             {
 990                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
 991                                                          : wxEVT_SET_FOCUS,
 992                                    m_windowId);
 993                 event.SetEventObject( this );
 994                 GetEventHandler()->ProcessEvent(event);
 995             }
 996             break;
 997
 998         case EN_CHANGE:
 999             {
1000                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1001                 InitCommandEvent(event);
1002                 event.SetString(GetValue());
1003                 ProcessCommand(event);
1004             }
1005             break;
1006
1007         case EN_MAXTEXT:
1008             // the text size limit has been hit - increase it
1009             if ( !AdjustSpaceLimit() )
1010             {
1011                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1012                 InitCommandEvent(event);
1013                 event.SetString(GetValue());
1014                 ProcessCommand(event);
1015             }
1016             break;
1017
1018             // the other notification messages are not processed
1019         case EN_UPDATE:
1020         case EN_ERRSPACE:
1021         case EN_HSCROLL:
1022         case EN_VSCROLL:
1023             return FALSE;
1024         default:
1025             return FALSE;
1026     }
1027
1028     // processed
1029     return TRUE;
1030 }
1031
1032 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1033 #if wxUSE_CTL3D
1034                                WXUINT message,
1035                                WXWPARAM wParam,
1036                                WXLPARAM lParam
1037 #else
1038                                WXUINT WXUNUSED(message),
1039                                WXWPARAM WXUNUSED(wParam),
1040                                WXLPARAM WXUNUSED(lParam)
1041 #endif
1042     )
1043 {
1044 #if wxUSE_CTL3D
1045     if ( m_useCtl3D )
1046     {
1047         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1048         return (WXHBRUSH) hbrush;
1049     }
1050 #endif // wxUSE_CTL3D
1051
1052     HDC hdc = (HDC)pDC;
1053     if (GetParent()->GetTransparentBackground())
1054         SetBkMode(hdc, TRANSPARENT);
1055     else
1056         SetBkMode(hdc, OPAQUE);
1057
1058     wxColour colBack = GetBackgroundColour();
1059
1060     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1061         colBack = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
1062
1063     ::SetBkColor(hdc, wxColourToRGB(colBack));
1064     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1065
1066     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1067
1068     return (WXHBRUSH)brush->GetResourceHandle();
1069 }
1070
1071 // In WIN16, need to override normal erasing because
1072 // Ctl3D doesn't use the wxWindows background colour.
1073 #ifdef __WIN16__
1074 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1075 {
1076     wxColour col(m_backgroundColour);
1077
1078 #if wxUSE_CTL3D
1079     if (m_useCtl3D)
1080         col = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
1081 #endif
1082
1083     RECT rect;
1084     ::GetClientRect(GetHwnd(), &rect);
1085
1086     COLORREF ref = PALETTERGB(col.Red(),
1087                               col.Green(),
1088                               col.Blue());
1089     HBRUSH hBrush = ::CreateSolidBrush(ref);
1090     if ( !hBrush )
1091         wxLogLastError(wxT("CreateSolidBrush"));
1092
1093     HDC hdc = (HDC)event.GetDC()->GetHDC();
1094
1095     int mode = ::SetMapMode(hdc, MM_TEXT);
1096
1097     ::FillRect(hdc, &rect, hBrush);
1098     ::DeleteObject(hBrush);
1099     ::SetMapMode(hdc, mode);
1100
1101 }
1102 #endif
1103
1104 bool wxTextCtrl::AdjustSpaceLimit()
1105 {
1106 #ifndef __WIN16__
1107     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1108
1109     // HACK: we try to automatically extend the limit for the amount of text
1110     //       to allow (interactively) entering more than 64Kb of text under
1111     //       Win9x but we shouldn't reset the text limit which was previously
1112     //       set explicitly with SetMaxLength()
1113     //
1114     //       we could solve this by storing the limit we set in wxTextCtrl but
1115     //       to save space we prefer to simply test here the actual limit
1116     //       value: we consider that SetMaxLength() can only be called for
1117     //       values < 32Kb
1118     if ( limit < 0x8000 )
1119     {
1120         // we've got more text than limit set by SetMaxLength()
1121         return FALSE;
1122     }
1123
1124     unsigned int len = ::GetWindowTextLength(GetHwnd());
1125     if ( len >= limit )
1126     {
1127         limit = len + 0x8000;    // 32Kb
1128
1129 #if wxUSE_RICHEDIT
1130         if ( m_isRich )
1131         {
1132             // as a nice side effect, this also allows passing limit > 64Kb
1133             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1134         }
1135         else
1136 #endif // wxUSE_RICHEDIT
1137         {
1138             if ( limit > 0xffff )
1139             {
1140                 // this will set it to a platform-dependent maximum (much more
1141                 // than 64Kb under NT)
1142                 limit = 0;
1143             }
1144
1145             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1146         }
1147     }
1148 #endif // !Win16
1149
1150     // we changed the limit
1151     return TRUE;
1152 }
1153
1154 bool wxTextCtrl::AcceptsFocus() const
1155 {
1156     // we don't want focus if we can't be edited
1157     return IsEditable() && wxControl::AcceptsFocus();
1158 }
1159
1160 wxSize wxTextCtrl::DoGetBestSize() const
1161 {
1162     int cx, cy;
1163     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1164
1165     int wText = DEFAULT_ITEM_WIDTH;
1166
1167     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1168     if ( m_windowStyle & wxTE_MULTILINE )
1169     {
1170         hText *= wxMax(GetNumberOfLines(), 5);
1171     }
1172     //else: for single line control everything is ok
1173
1174     return wxSize(wText, hText);
1175 }
1176
1177 // ----------------------------------------------------------------------------
1178 // standard handlers for standard edit menu events
1179 // ----------------------------------------------------------------------------
1180
1181 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1182 {
1183     Cut();
1184 }
1185
1186 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1187 {
1188     Copy();
1189 }
1190
1191 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1192 {
1193     Paste();
1194 }
1195
1196 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1197 {
1198     Undo();
1199 }
1200
1201 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1202 {
1203     Redo();
1204 }
1205
1206 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1207 {
1208     event.Enable( CanCut() );
1209 }
1210
1211 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1212 {
1213     event.Enable( CanCopy() );
1214 }
1215
1216 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1217 {
1218     event.Enable( CanPaste() );
1219 }
1220
1221 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1222 {
1223     event.Enable( CanUndo() );
1224 }
1225
1226 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1227 {
1228     event.Enable( CanRedo() );
1229 }
1230
1231 // the rest of the file only deals with the rich edit controls
1232 #if wxUSE_RICHEDIT
1233
1234 // ----------------------------------------------------------------------------
1235 // EN_LINK processing
1236 // ----------------------------------------------------------------------------
1237
1238 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1239 {
1240     NMHDR *hdr = (NMHDR* )lParam;
1241     if ( hdr->code == EN_LINK )
1242     {
1243         ENLINK *enlink = (ENLINK *)hdr;
1244
1245         switch ( enlink->msg )
1246         {
1247             case WM_SETCURSOR:
1248                 // ok, so it is hardcoded - do we really nee to customize it?
1249                 ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1250                 *result = TRUE;
1251                 break;
1252
1253             case WM_MOUSEMOVE:
1254             case WM_LBUTTONDOWN:
1255             case WM_LBUTTONUP:
1256             case WM_LBUTTONDBLCLK:
1257             case WM_RBUTTONDOWN:
1258             case WM_RBUTTONUP:
1259             case WM_RBUTTONDBLCLK:
1260                 // send a mouse event
1261                 {
1262                     static const wxEventType eventsMouse[] =
1263                     {
1264                         wxEVT_MOTION,
1265                         wxEVT_LEFT_DOWN,
1266                         wxEVT_LEFT_UP,
1267                         wxEVT_LEFT_DCLICK,
1268                         wxEVT_RIGHT_DOWN,
1269                         wxEVT_RIGHT_UP,
1270                         wxEVT_RIGHT_DCLICK,
1271                     };
1272
1273                     // the event ids are consecutive
1274                     wxMouseEvent
1275                         evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1276
1277                     InitMouseEvent(evtMouse,
1278                                    GET_X_LPARAM(enlink->lParam),
1279                                    GET_Y_LPARAM(enlink->lParam),
1280                                    enlink->wParam);
1281
1282                     wxTextUrlEvent event(m_windowId, evtMouse,
1283                                          enlink->chrg.cpMin,
1284                                          enlink->chrg.cpMax);
1285
1286                     InitCommandEvent(event);
1287
1288                     *result = ProcessCommand(event);
1289                 }
1290                 break;
1291         }
1292
1293         return TRUE;
1294     }
1295
1296     // not processed
1297     return FALSE;
1298 }
1299
1300 // ----------------------------------------------------------------------------
1301 // colour setting for the rich edit controls
1302 // ----------------------------------------------------------------------------
1303
1304 // Watcom C++ doesn't define this
1305 #ifndef SCF_ALL
1306 #define SCF_ALL 0x0004
1307 #endif
1308
1309 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1310 {
1311     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1312     {
1313         // colour didn't really change
1314         return FALSE;
1315     }
1316
1317     if ( IsRich() )
1318     {
1319         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1320         // EM_SETBKGNDCOLOR additionally
1321         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1322     }
1323
1324     return TRUE;
1325 }
1326
1327 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1328 {
1329     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1330     {
1331         // colour didn't really change
1332         return FALSE;
1333     }
1334
1335     if ( IsRich() )
1336     {
1337         // change the colour of everything
1338         CHARFORMAT cf;
1339         wxZeroMemory(cf);
1340         cf.cbSize = sizeof(cf);
1341         cf.dwMask = CFM_COLOR;
1342         cf.crTextColor = wxColourToRGB(colour);
1343         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1344     }
1345
1346     return TRUE;
1347 }
1348
1349 // ----------------------------------------------------------------------------
1350 // styling support for rich edit controls
1351 // ----------------------------------------------------------------------------
1352
1353 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1354 {
1355     if ( !IsRich() )
1356     {
1357         // can't do it with normal text control
1358         return FALSE;
1359     }
1360
1361     // the rich text control doesn't handle setting background colour, so don't
1362     // even try if it's the only thing we want to change
1363     if ( wxRichEditModule::GetLoadedVersion() < 2 &&
1364          !style.HasFont() && !style.HasTextColour() )
1365     {
1366         // nothing to do: return TRUE if there was really nothing to do and
1367         // FALSE if we failed to set bg colour
1368         return !style.HasBackgroundColour();
1369     }
1370
1371     // order the range if needed
1372     if ( start > end )
1373     {
1374         long tmp = start;
1375         start = end;
1376         end = tmp;
1377     }
1378
1379     // we can only change the format of the selection, so select the range we
1380     // want and restore the old selection later
1381     long startOld, endOld;
1382     GetSelection(&startOld, &endOld);
1383
1384     // but do we really have to change the selection?
1385     bool changeSel = start != startOld || end != endOld;
1386
1387     if ( changeSel )
1388         SendMessage(GetHwnd(), EM_SETSEL, (WPARAM) start, (LPARAM) end);
1389
1390     // initialize CHARFORMAT struct
1391 #if wxUSE_RICHEDIT2
1392     CHARFORMAT2 cf;
1393 #else
1394     CHARFORMAT cf;
1395 #endif
1396     wxZeroMemory(cf);
1397     cf.cbSize = sizeof(cf);
1398
1399     if ( style.HasFont() )
1400     {
1401         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1402                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1403
1404         // fill in data from LOGFONT but recalculate lfHeight because we need
1405         // the real height in twips and not the negative number which
1406         // wxFillLogFont() returns (this is correct in general and works with
1407         // the Windows font mapper, but not here)
1408         LOGFONT lf;
1409         wxFillLogFont(&lf, &style.GetFont());
1410         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1411         cf.bCharSet = lf.lfCharSet;
1412         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1413         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1414
1415         // also deal with underline/italic/bold attributes: note that we must
1416         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1417         // style to allow clearing it
1418         if ( lf.lfItalic )
1419         {
1420             cf.dwEffects |= CFE_ITALIC;
1421         }
1422
1423         if ( lf.lfWeight == FW_BOLD )
1424         {
1425             cf.dwEffects |= CFE_BOLD;
1426         }
1427
1428         if ( lf.lfUnderline )
1429         {
1430             cf.dwEffects |= CFE_UNDERLINE;
1431         }
1432
1433         // strikeout fonts are not supported by wxWindows
1434     }
1435
1436     if ( style.HasTextColour() )
1437     {
1438         cf.dwMask |= CFM_COLOR;
1439         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1440     }
1441
1442 #if wxUSE_RICHEDIT2
1443     if ( wxRichEditModule::GetLoadedVersion() > 1 && style.HasBackgroundColour() )
1444     {
1445         cf.dwMask |= CFM_BACKCOLOR;
1446         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1447     }
1448 #endif // wxUSE_RICHEDIT2
1449
1450     // do format the selection
1451     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1452                             SCF_SELECTION, (LPARAM)&cf) != 0;
1453     if ( !ok )
1454     {
1455         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1456     }
1457
1458     if ( changeSel )
1459     {
1460         // restore the original selection
1461         SendMessage(GetHwnd(), EM_SETSEL, (WPARAM)startOld, (LPARAM)endOld);
1462     }
1463
1464     return ok;
1465 }
1466
1467 // ----------------------------------------------------------------------------
1468 // wxRichEditModule
1469 // ----------------------------------------------------------------------------
1470
1471 bool wxRichEditModule::OnInit()
1472 {
1473     // don't do anything - we will load it when needed
1474     return TRUE;
1475 }
1476
1477 void wxRichEditModule::OnExit()
1478 {
1479     if ( ms_hRichEdit )
1480     {
1481         FreeLibrary(ms_hRichEdit);
1482     }
1483 }
1484
1485 /* static */
1486 bool wxRichEditModule::Load(int version)
1487 {
1488     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1489                  _T("incorrect richedit control version requested") );
1490
1491     if ( version <= ms_verRichEdit )
1492     {
1493         // we've already got this or better
1494         return TRUE;
1495     }
1496
1497     if ( ms_hRichEdit )
1498     {
1499         ::FreeLibrary(ms_hRichEdit);
1500     }
1501
1502     // always try load riched20.dll first - like this we won't have to reload
1503     // it later if we're first asked for RE 1 and then for RE 2 or 3
1504     wxString dllname = _T("riched20.dll");
1505     ms_hRichEdit = ::LoadLibrary(dllname);
1506     ms_verRichEdit = 2; // no way to tell if it's 2 or 3, assume 2
1507
1508     if ( !ms_hRichEdit && (version == 1) )
1509     {
1510         // fall back to RE 1
1511         dllname = _T("riched32.dll");
1512         ms_hRichEdit = ::LoadLibrary(dllname);
1513         ms_verRichEdit = 1;
1514     }
1515
1516     if ( !ms_hRichEdit )
1517     {
1518         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1519
1520         ms_verRichEdit = -1;
1521
1522         return FALSE;
1523     }
1524
1525     return TRUE;
1526 }
1527
1528 #endif // wxUSE_RICHEDIT
1529
1530 #endif // wxUSE_TEXTCTRL