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_VISIBLE | WS_CHILD | 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     bool want3D;
 301     WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
 302
 303     // Even with extended styles, need to combine with WS_BORDER for them to
 304     // look right.
 305     if ( want3D || wxStyleHasBorder(m_windowStyle) )
 306         msStyle |= WS_BORDER;
 307
 308     // NB: don't use pos and size as CreateWindowEx arguments because they
 309     //     might be -1 in which case we should use the default values (and
 310     //     SetSize called below takes care of it)
 311     m_hWnd = (WXHWND)::CreateWindowEx(exStyle,
 312                                       windowClass.c_str(),
 313                                       NULL,
 314                                       msStyle,
 315                                       0, 0, 0, 0,
 316                                       GetHwndOf(parent),
 317                                       (HMENU)m_windowId,
 318                                       wxGetInstance(),
 319                                       NULL);
 320
 321     wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create text ctrl") );
 322
 323 #if wxUSE_CTL3D
 324     if ( want3D )
 325     {
 326         Ctl3dSubclassCtl(GetHwnd());
 327         m_useCtl3D = TRUE;
 328     }
 329 #endif
 330
 331 #if wxUSE_RICHEDIT
 332     if (m_isRich)
 333     {
 334         // have to enable events manually
 335         LPARAM mask = ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE;
 336
 337         if ( m_windowStyle & wxTE_AUTO_URL )
 338         {
 339             mask |= ENM_LINK;
 340
 341             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 342         }
 343
 344         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 345     }
 346 #endif // wxUSE_RICHEDIT
 347
 348     SubclassWin(GetHWND());
 349
 350     // set font, position, size and initial value
 351     wxFont& fontParent = parent->GetFont();
 352     if ( fontParent.Ok() )
 353     {
 354         SetFont(fontParent);
 355     }
 356     else
 357     {
 358         SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 359     }
 360
 361     // Causes a crash for Symantec C++ and WIN32 for some reason
 362 #if !(defined(__SC__) && defined(__WIN32__))
 363     if ( !value.IsEmpty() )
 364     {
 365         SetValue(value);
 366     }
 367 #endif
 368
 369     // set colours
 370     SetupColours();
 371
 372     SetSize(pos.x, pos.y, size.x, size.y);
 373
 374     return TRUE;
 375 }
 376
 377 // Make sure the window style (etc.) reflects the HWND style (roughly)
 378 void wxTextCtrl::AdoptAttributesFromHWND()
 379 {
 380   wxWindow::AdoptAttributesFromHWND();
 381
 382   HWND hWnd = GetHwnd();
 383   long style = GetWindowLong(hWnd, GWL_STYLE);
 384
 385   // retrieve the style to see whether this is an edit or richedit ctrl
 386 #if wxUSE_RICHEDIT
 387   wxChar buf[256];
 388
 389   GetClassName(hWnd, buf, WXSIZEOF(buf));
 390
 391   if ( wxStricmp(buf, wxT("EDIT")) == 0 )
 392     m_isRich = FALSE;
 393   else
 394     m_isRich = TRUE;
 395 #endif // wxUSE_RICHEDIT
 396
 397   if (style & ES_MULTILINE)
 398     m_windowStyle |= wxTE_MULTILINE;
 399   if (style & ES_PASSWORD)
 400     m_windowStyle |= wxTE_PASSWORD;
 401   if (style & ES_READONLY)
 402     m_windowStyle |= wxTE_READONLY;
 403   if (style & ES_WANTRETURN)
 404     m_windowStyle |= wxTE_PROCESS_ENTER;
 405 }
 406
 407 void wxTextCtrl::SetupColours()
 408 {
 409     wxColour bkgndColour;
 410 //    if (IsEditable() || (m_windowStyle & wxTE_MULTILINE))
 411         bkgndColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
 412 //    else
 413 //        bkgndColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
 414
 415     SetBackgroundColour(bkgndColour);
 416     SetForegroundColour(GetParent()->GetForegroundColour());
 417 }
 418
 419 // ----------------------------------------------------------------------------
 420 // set/get the controls text
 421 // ----------------------------------------------------------------------------
 422
 423 wxString wxTextCtrl::GetValue() const
 424 {
 425     // we can't use wxGetWindowText() (i.e. WM_GETTEXT internally) for
 426     // retrieving more than 64Kb under Win9x
 427 #if wxUSE_RICHEDIT
 428     if ( m_isRich )
 429     {
 430         wxString str;
 431
 432         int len = GetWindowTextLength(GetHwnd());
 433         if ( len )
 434         {
 435             // alloc one extra WORD as needed by the control
 436             wxChar *p = str.GetWriteBuf(++len);
 437
 438             TEXTRANGE textRange;
 439             textRange.chrg.cpMin = 0;
 440             textRange.chrg.cpMax = -1;
 441             textRange.lpstrText = p;
 442
 443             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 444
 445             // believe it or not, but EM_GETTEXTRANGE uses just CR ('\r') for
 446             // the newlines which is neither Unix nor Windows style (Win95 with
 447             // riched20.dll shows this behaviour) - convert it to something
 448             // reasonable
 449             for ( ; *p; p++ )
 450             {
 451                 if ( *p == _T('\r') )
 452                     *p = _T('\n');
 453             }
 454
 455             str.UngetWriteBuf();
 456         }
 457         //else: no text at all, leave the string empty
 458
 459         return str;
 460     }
 461 #endif // wxUSE_RICHEDIT
 462
 463     // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 464     // same one as above for consitency
 465     wxString str = wxGetWindowText(GetHWND());
 466
 467     return wxTextFile::Translate(str, wxTextFileType_Unix);
 468 }
 469
 470 void wxTextCtrl::SetValue(const wxString& value)
 471 {
 472     // if the text is long enough, it's faster to just set it instead of first
 473     // comparing it with the old one (chances are that it will be different
 474     // anyhow, this comparison is there to avoid flicker for small single-line
 475     // edit controls mostly)
 476     if ( (value.length() > 0x400) || (value != GetValue()) )
 477     {
 478         wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 479
 480         SetWindowText(GetHwnd(), valueDos.c_str());
 481
 482         // for compatibility with the GTK and because it is more logical, we
 483         // move the cursor to the end of the text after SetValue()
 484
 485         // GRG, Jun/2000: Changed this back after a lot of discussion
 486         //   in the lists. wxWindows 2.2 will have a set of flags to
 487         //   customize this behaviour.
 488         //SetInsertionPointEnd();
 489
 490         AdjustSpaceLimit();
 491     }
 492 }
 493
 494 void wxTextCtrl::WriteText(const wxString& value)
 495 {
 496     wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 497
 498 #if wxUSE_RICHEDIT
 499     // ensure that the new text will be in the default style
 500     if ( IsRich() &&
 501             (m_defaultStyle.HasFont() || m_defaultStyle.HasTextColour()) )
 502     {
 503         long start, end;
 504         GetSelection(&start, &end);
 505         SetStyle(start, end, m_defaultStyle );
 506     }
 507 #endif // wxUSE_RICHEDIT
 508
 509     SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
 510
 511     AdjustSpaceLimit();
 512 }
 513
 514 void wxTextCtrl::AppendText(const wxString& text)
 515 {
 516     SetInsertionPointEnd();
 517     WriteText(text);
 518 }
 519
 520 void wxTextCtrl::Clear()
 521 {
 522     SetWindowText(GetHwnd(), wxT(""));
 523 }
 524
 525 // ----------------------------------------------------------------------------
 526 // Clipboard operations
 527 // ----------------------------------------------------------------------------
 528
 529 void wxTextCtrl::Copy()
 530 {
 531     if (CanCopy())
 532     {
 533         HWND hWnd = GetHwnd();
 534         SendMessage(hWnd, WM_COPY, 0, 0L);
 535     }
 536 }
 537
 538 void wxTextCtrl::Cut()
 539 {
 540     if (CanCut())
 541     {
 542         HWND hWnd = GetHwnd();
 543         SendMessage(hWnd, WM_CUT, 0, 0L);
 544     }
 545 }
 546
 547 void wxTextCtrl::Paste()
 548 {
 549     if (CanPaste())
 550     {
 551         HWND hWnd = GetHwnd();
 552         SendMessage(hWnd, WM_PASTE, 0, 0L);
 553     }
 554 }
 555
 556 bool wxTextCtrl::CanCopy() const
 557 {
 558     // Can copy if there's a selection
 559     long from, to;
 560     GetSelection(& from, & to);
 561     return (from != to) ;
 562 }
 563
 564 bool wxTextCtrl::CanCut() const
 565 {
 566     // Can cut if there's a selection
 567     long from, to;
 568     GetSelection(& from, & to);
 569     return (from != to) && (IsEditable());
 570 }
 571
 572 bool wxTextCtrl::CanPaste() const
 573 {
 574 #if wxUSE_RICHEDIT
 575     if (m_isRich)
 576     {
 577         int dataFormat = 0; // 0 == any format
 578         return (::SendMessage( GetHwnd(), EM_CANPASTE, (WPARAM) (UINT) dataFormat, 0) != 0);
 579     }
 580 #endif
 581     if (!IsEditable())
 582         return FALSE;
 583
 584     // Standard edit control: check for straight text on clipboard
 585     bool isTextAvailable = FALSE;
 586     if ( ::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 587     {
 588         isTextAvailable = (::IsClipboardFormatAvailable(CF_TEXT) != 0);
 589         ::CloseClipboard();
 590     }
 591
 592     return isTextAvailable;
 593 }
 594
 595 // ----------------------------------------------------------------------------
 596 // Accessors
 597 // ----------------------------------------------------------------------------
 598
 599 void wxTextCtrl::SetEditable(bool editable)
 600 {
 601     HWND hWnd = GetHwnd();
 602     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 603 }
 604
 605 void wxTextCtrl::SetInsertionPoint(long pos)
 606 {
 607     HWND hWnd = GetHwnd();
 608 #ifdef __WIN32__
 609 #if wxUSE_RICHEDIT
 610     if ( m_isRich)
 611     {
 612         CHARRANGE range;
 613         range.cpMin = pos;
 614         range.cpMax = pos;
 615         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 616         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 617     }
 618     else
 619 #endif // wxUSE_RICHEDIT
 620     {
 621         SendMessage(hWnd, EM_SETSEL, pos, pos);
 622         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 623     }
 624 #else // Win16
 625     SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 626 #endif // Win32/16
 627
 628 #if wxUSE_RICHEDIT
 629     if ( !m_isRich)
 630 #endif
 631     {
 632         static const wxChar *nothing = _T("");
 633         SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 634     }
 635 }
 636
 637 void wxTextCtrl::SetInsertionPointEnd()
 638 {
 639     long pos = GetLastPosition();
 640     SetInsertionPoint(pos);
 641 }
 642
 643 long wxTextCtrl::GetInsertionPoint() const
 644 {
 645 #if wxUSE_RICHEDIT
 646     if (m_isRich)
 647     {
 648         CHARRANGE range;
 649         range.cpMin = 0;
 650         range.cpMax = 0;
 651         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 652         return range.cpMin;
 653     }
 654 #endif
 655
 656     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 657     return Pos & 0xFFFF;
 658 }
 659
 660 long wxTextCtrl::GetLastPosition() const
 661 {
 662     HWND hWnd = GetHwnd();
 663
 664     // Will always return a number > 0 (according to docs)
 665     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 666
 667     // This gets the char index for the _beginning_ of the last line
 668     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 669
 670     // Get number of characters in the last line. We'll add this to the character
 671     // index for the last line, 1st position.
 672     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 673
 674     return (long)(charIndex + lineLength);
 675 }
 676
 677 // If the return values from and to are the same, there is no
 678 // selection.
 679 void wxTextCtrl::GetSelection(long* from, long* to) const
 680 {
 681 #if wxUSE_RICHEDIT
 682     if (m_isRich)
 683     {
 684         CHARRANGE charRange;
 685         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) (CHARRANGE*) & charRange);
 686
 687         *from = charRange.cpMin;
 688         *to = charRange.cpMax;
 689     }
 690     else
 691 #endif // rich/!rich
 692     {
 693         DWORD dwStart, dwEnd;
 694         WPARAM wParam = (WPARAM) &dwStart; // receives starting position
 695         LPARAM lParam = (LPARAM) &dwEnd;   // receives ending position
 696
 697         ::SendMessage(GetHwnd(), EM_GETSEL, wParam, lParam);
 698
 699         *from = dwStart;
 700         *to = dwEnd;
 701     }
 702 }
 703
 704 bool wxTextCtrl::IsEditable() const
 705 {
 706     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 707
 708     return ((style & ES_READONLY) == 0);
 709 }
 710
 711 // ----------------------------------------------------------------------------
 712 // Editing
 713 // ----------------------------------------------------------------------------
 714
 715 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 716 {
 717     HWND hWnd = GetHwnd();
 718     long fromChar = from;
 719     long toChar = to;
 720
 721     // Set selection and remove it
 722 #ifdef __WIN32__
 723     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 724     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)TRUE, (LPARAM)value.c_str());
 725 #else
 726     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 727     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)0, (LPARAM)value.c_str());
 728 #endif
 729 }
 730
 731 void wxTextCtrl::Remove(long from, long to)
 732 {
 733     HWND hWnd = GetHwnd();
 734     long fromChar = from;
 735     long toChar = to;
 736
 737     // Cut all selected text
 738 #ifdef __WIN32__
 739     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 740     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)TRUE, (LPARAM)"");
 741 #else
 742     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 743     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)0, (LPARAM)"");
 744 #endif
 745 }
 746
 747 void wxTextCtrl::SetSelection(long from, long to)
 748 {
 749     HWND hWnd = GetHwnd();
 750     long fromChar = from;
 751     long toChar = to;
 752
 753     // if from and to are both -1, it means (in wxWindows) that all text should
 754     // be selected. Translate into Windows convention
 755     if ((from == -1) && (to == -1))
 756     {
 757       fromChar = 0;
 758       toChar = -1;
 759     }
 760
 761 #ifdef __WIN32__
 762     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 763     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 764 #else
 765     // WPARAM is 0: selection is scrolled into view
 766     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 767 #endif
 768 }
 769
 770 bool wxTextCtrl::LoadFile(const wxString& file)
 771 {
 772     if ( wxTextCtrlBase::LoadFile(file) )
 773     {
 774         // update the size limit if needed
 775         AdjustSpaceLimit();
 776
 777         return TRUE;
 778     }
 779
 780     return FALSE;
 781 }
 782
 783 bool wxTextCtrl::IsModified() const
 784 {
 785     return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
 786 }
 787
 788 // Makes 'unmodified'
 789 void wxTextCtrl::DiscardEdits()
 790 {
 791     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 792 }
 793
 794 int wxTextCtrl::GetNumberOfLines() const
 795 {
 796     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 797 }
 798
 799 long wxTextCtrl::XYToPosition(long x, long y) const
 800 {
 801     HWND hWnd = GetHwnd();
 802
 803     // This gets the char index for the _beginning_ of this line
 804     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 805     return (long)(x + charIndex);
 806 }
 807
 808 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 809 {
 810     HWND hWnd = GetHwnd();
 811
 812     // This gets the line number containing the character
 813     int lineNo;
 814 #if wxUSE_RICHEDIT
 815     if ( m_isRich )
 816     {
 817         lineNo = (int)SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
 818     }
 819     else
 820 #endif // wxUSE_RICHEDIT
 821         lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
 822
 823     if ( lineNo == -1 )
 824     {
 825         // no such line
 826         return FALSE;
 827     }
 828
 829     // This gets the char index for the _beginning_ of this line
 830     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 831     if ( charIndex == -1 )
 832     {
 833         return FALSE;
 834     }
 835
 836     // The X position must therefore be the different between pos and charIndex
 837     if ( x )
 838         *x = (long)(pos - charIndex);
 839     if ( y )
 840         *y = (long)lineNo;
 841
 842     return TRUE;
 843 }
 844
 845 void wxTextCtrl::ShowPosition(long pos)
 846 {
 847     HWND hWnd = GetHwnd();
 848
 849     // To scroll to a position, we pass the number of lines and characters
 850     // to scroll *by*. This means that we need to:
 851     // (1) Find the line position of the current line.
 852     // (2) Find the line position of pos.
 853     // (3) Scroll by (pos - current).
 854     // For now, ignore the horizontal scrolling.
 855
 856     // Is this where scrolling is relative to - the line containing the caret?
 857     // Or is the first visible line??? Try first visible line.
 858 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 859
 860     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 861
 862     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 863
 864     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 865
 866     if (linesToScroll != 0)
 867       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 868 }
 869
 870 int wxTextCtrl::GetLineLength(long lineNo) const
 871 {
 872     long charIndex = XYToPosition(0, lineNo);
 873     int len = (int)SendMessage(GetHwnd(), EM_LINELENGTH, charIndex, 0);
 874     return len;
 875 }
 876
 877 wxString wxTextCtrl::GetLineText(long lineNo) const
 878 {
 879     size_t len = (size_t)GetLineLength(lineNo) + 1;
 880
 881     // there must be at least enough place for the length WORD in the
 882     // buffer
 883     len += sizeof(WORD);
 884
 885     wxString str;
 886     wxChar *buf = str.GetWriteBuf(len);
 887
 888     *(WORD *)buf = (WORD)len;
 889     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
 890     buf[len] = 0;
 891
 892     str.UngetWriteBuf(len);
 893
 894     return str;
 895 }
 896
 897 void wxTextCtrl::SetMaxLength(unsigned long len)
 898 {
 899     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
 900 }
 901
 902 // ----------------------------------------------------------------------------
 903 // Undo/redo
 904 // ----------------------------------------------------------------------------
 905
 906 void wxTextCtrl::Undo()
 907 {
 908     if (CanUndo())
 909     {
 910         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 911     }
 912 }
 913
 914 void wxTextCtrl::Redo()
 915 {
 916     if (CanRedo())
 917     {
 918         // Same as Undo, since Undo undoes the undo, i.e. a redo.
 919         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 920     }
 921 }
 922
 923 bool wxTextCtrl::CanUndo() const
 924 {
 925     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 926 }
 927
 928 bool wxTextCtrl::CanRedo() const
 929 {
 930     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 931 }
 932
 933 // ----------------------------------------------------------------------------
 934 // implemenation details
 935 // ----------------------------------------------------------------------------
 936
 937 void wxTextCtrl::Command(wxCommandEvent & event)
 938 {
 939     SetValue(event.GetString());
 940     ProcessCommand (event);
 941 }
 942
 943 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 944 {
 945     // By default, load the first file into the text window.
 946     if (event.GetNumberOfFiles() > 0)
 947     {
 948         LoadFile(event.GetFiles()[0]);
 949     }
 950 }
 951
 952 // ----------------------------------------------------------------------------
 953 // kbd input processing
 954 // ----------------------------------------------------------------------------
 955
 956 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
 957 {
 958     MSG *msg = (MSG *)pMsg;
 959
 960     // check for our special keys here: if we don't do it and the parent frame
 961     // uses them as accelerators, they wouldn't work at all, so we disable
 962     // usual preprocessing for them
 963     if ( msg->message == WM_KEYDOWN )
 964     {
 965         WORD vkey = msg->wParam;
 966         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
 967         {
 968             if ( vkey == VK_BACK )
 969                 return FALSE;
 970         }
 971         else // no Alt
 972         {
 973             if ( wxIsCtrlDown() )
 974             {
 975                 switch ( vkey )
 976                 {
 977                     case 'C':
 978                     case 'V':
 979                     case 'X':
 980                     case VK_INSERT:
 981                     case VK_DELETE:
 982                     case VK_HOME:
 983                     case VK_END:
 984                         return FALSE;
 985                 }
 986             }
 987             else if ( wxIsShiftDown() )
 988             {
 989                 if ( vkey == VK_INSERT || vkey == VK_DELETE )
 990                     return FALSE;
 991             }
 992         }
 993     }
 994
 995     return wxControl::MSWShouldPreProcessMessage(pMsg);
 996 }
 997
 998 void wxTextCtrl::OnChar(wxKeyEvent& event)
 999 {
1000     switch ( event.KeyCode() )
1001     {
1002         case WXK_RETURN:
1003             if ( !(m_windowStyle & wxTE_MULTILINE) )
1004             {
1005                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1006                 InitCommandEvent(event);
1007                 event.SetString(GetValue());
1008                 if ( GetEventHandler()->ProcessEvent(event) )
1009                     return;
1010             }
1011             //else: multiline controls need Enter for themselves
1012
1013             break;
1014
1015         case WXK_TAB:
1016             // always produce navigation event - even if we process TAB
1017             // ourselves the fact that we got here means that the user code
1018             // decided to skip processing of this TAB - probably to let it
1019             // do its default job.
1020             {
1021                 wxNavigationKeyEvent eventNav;
1022                 eventNav.SetDirection(!event.ShiftDown());
1023                 eventNav.SetWindowChange(event.ControlDown());
1024                 eventNav.SetEventObject(this);
1025
1026                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1027                     return;
1028             }
1029             break;
1030     }
1031
1032     // no, we didn't process it
1033     event.Skip();
1034 }
1035
1036 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1037 {
1038     switch (param)
1039     {
1040         case EN_SETFOCUS:
1041         case EN_KILLFOCUS:
1042             {
1043                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1044                                                          : wxEVT_SET_FOCUS,
1045                                    m_windowId);
1046                 event.SetEventObject( this );
1047                 GetEventHandler()->ProcessEvent(event);
1048             }
1049             break;
1050
1051         case EN_CHANGE:
1052             {
1053                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1054                 InitCommandEvent(event);
1055                 event.SetString(GetValue());
1056                 ProcessCommand(event);
1057             }
1058             break;
1059
1060         case EN_MAXTEXT:
1061             // the text size limit has been hit - increase it
1062             if ( !AdjustSpaceLimit() )
1063             {
1064                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1065                 InitCommandEvent(event);
1066                 event.SetString(GetValue());
1067                 ProcessCommand(event);
1068             }
1069             break;
1070
1071             // the other notification messages are not processed
1072         case EN_UPDATE:
1073         case EN_ERRSPACE:
1074         case EN_HSCROLL:
1075         case EN_VSCROLL:
1076             return FALSE;
1077         default:
1078             return FALSE;
1079     }
1080
1081     // processed
1082     return TRUE;
1083 }
1084
1085 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1086 #if wxUSE_CTL3D
1087                                WXUINT message,
1088                                WXWPARAM wParam,
1089                                WXLPARAM lParam
1090 #else
1091                                WXUINT WXUNUSED(message),
1092                                WXWPARAM WXUNUSED(wParam),
1093                                WXLPARAM WXUNUSED(lParam)
1094 #endif
1095     )
1096 {
1097 #if wxUSE_CTL3D
1098     if ( m_useCtl3D )
1099     {
1100         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1101         return (WXHBRUSH) hbrush;
1102     }
1103 #endif // wxUSE_CTL3D
1104
1105     HDC hdc = (HDC)pDC;
1106     if (GetParent()->GetTransparentBackground())
1107         SetBkMode(hdc, TRANSPARENT);
1108     else
1109         SetBkMode(hdc, OPAQUE);
1110
1111     wxColour colBack = GetBackgroundColour();
1112
1113     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1114         colBack = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
1115
1116     ::SetBkColor(hdc, wxColourToRGB(colBack));
1117     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1118
1119     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1120
1121     return (WXHBRUSH)brush->GetResourceHandle();
1122 }
1123
1124 // In WIN16, need to override normal erasing because
1125 // Ctl3D doesn't use the wxWindows background colour.
1126 #ifdef __WIN16__
1127 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1128 {
1129     wxColour col(m_backgroundColour);
1130
1131 #if wxUSE_CTL3D
1132     if (m_useCtl3D)
1133         col = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
1134 #endif
1135
1136     RECT rect;
1137     ::GetClientRect(GetHwnd(), &rect);
1138
1139     COLORREF ref = PALETTERGB(col.Red(),
1140                               col.Green(),
1141                               col.Blue());
1142     HBRUSH hBrush = ::CreateSolidBrush(ref);
1143     if ( !hBrush )
1144         wxLogLastError(wxT("CreateSolidBrush"));
1145
1146     HDC hdc = (HDC)event.GetDC()->GetHDC();
1147
1148     int mode = ::SetMapMode(hdc, MM_TEXT);
1149
1150     ::FillRect(hdc, &rect, hBrush);
1151     ::DeleteObject(hBrush);
1152     ::SetMapMode(hdc, mode);
1153
1154 }
1155 #endif
1156
1157 bool wxTextCtrl::AdjustSpaceLimit()
1158 {
1159 #ifndef __WIN16__
1160     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1161
1162     // HACK: we try to automatically extend the limit for the amount of text
1163     //       to allow (interactively) entering more than 64Kb of text under
1164     //       Win9x but we shouldn't reset the text limit which was previously
1165     //       set explicitly with SetMaxLength()
1166     //
1167     //       we could solve this by storing the limit we set in wxTextCtrl but
1168     //       to save space we prefer to simply test here the actual limit
1169     //       value: we consider that SetMaxLength() can only be called for
1170     //       values < 32Kb
1171     if ( limit < 0x8000 )
1172     {
1173         // we've got more text than limit set by SetMaxLength()
1174         return FALSE;
1175     }
1176
1177     unsigned int len = ::GetWindowTextLength(GetHwnd());
1178     if ( len >= limit )
1179     {
1180         limit = len + 0x8000;    // 32Kb
1181
1182 #if wxUSE_RICHEDIT
1183         if ( m_isRich )
1184         {
1185             // as a nice side effect, this also allows passing limit > 64Kb
1186             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1187         }
1188         else
1189 #endif // wxUSE_RICHEDIT
1190         {
1191             if ( limit > 0xffff )
1192             {
1193                 // this will set it to a platform-dependent maximum (much more
1194                 // than 64Kb under NT)
1195                 limit = 0;
1196             }
1197
1198             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1199         }
1200     }
1201 #endif // !Win16
1202
1203     // we changed the limit
1204     return TRUE;
1205 }
1206
1207 bool wxTextCtrl::AcceptsFocus() const
1208 {
1209     // we don't want focus if we can't be edited
1210     return IsEditable() && wxControl::AcceptsFocus();
1211 }
1212
1213 wxSize wxTextCtrl::DoGetBestSize() const
1214 {
1215     int cx, cy;
1216     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1217
1218     int wText = DEFAULT_ITEM_WIDTH;
1219
1220     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1221     if ( m_windowStyle & wxTE_MULTILINE )
1222     {
1223         hText *= wxMax(GetNumberOfLines(), 5);
1224     }
1225     //else: for single line control everything is ok
1226
1227     return wxSize(wText, hText);
1228 }
1229
1230 // ----------------------------------------------------------------------------
1231 // standard handlers for standard edit menu events
1232 // ----------------------------------------------------------------------------
1233
1234 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1235 {
1236     Cut();
1237 }
1238
1239 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1240 {
1241     Copy();
1242 }
1243
1244 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1245 {
1246     Paste();
1247 }
1248
1249 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1250 {
1251     Undo();
1252 }
1253
1254 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1255 {
1256     Redo();
1257 }
1258
1259 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1260 {
1261     event.Enable( CanCut() );
1262 }
1263
1264 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1265 {
1266     event.Enable( CanCopy() );
1267 }
1268
1269 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1270 {
1271     event.Enable( CanPaste() );
1272 }
1273
1274 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1275 {
1276     event.Enable( CanUndo() );
1277 }
1278
1279 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1280 {
1281     event.Enable( CanRedo() );
1282 }
1283
1284 // the rest of the file only deals with the rich edit controls
1285 #if wxUSE_RICHEDIT
1286
1287 // ----------------------------------------------------------------------------
1288 // EN_LINK processing
1289 // ----------------------------------------------------------------------------
1290
1291 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1292 {
1293     NMHDR *hdr = (NMHDR* )lParam;
1294     if ( hdr->code == EN_LINK )
1295     {
1296         ENLINK *enlink = (ENLINK *)hdr;
1297
1298         switch ( enlink->msg )
1299         {
1300             case WM_SETCURSOR:
1301                 // ok, so it is hardcoded - do we really nee to customize it?
1302                 ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1303                 *result = TRUE;
1304                 break;
1305
1306             case WM_MOUSEMOVE:
1307             case WM_LBUTTONDOWN:
1308             case WM_LBUTTONUP:
1309             case WM_LBUTTONDBLCLK:
1310             case WM_RBUTTONDOWN:
1311             case WM_RBUTTONUP:
1312             case WM_RBUTTONDBLCLK:
1313                 // send a mouse event
1314                 {
1315                     static const wxEventType eventsMouse[] =
1316                     {
1317                         wxEVT_MOTION,
1318                         wxEVT_LEFT_DOWN,
1319                         wxEVT_LEFT_UP,
1320                         wxEVT_LEFT_DCLICK,
1321                         wxEVT_RIGHT_DOWN,
1322                         wxEVT_RIGHT_UP,
1323                         wxEVT_RIGHT_DCLICK,
1324                     };
1325
1326                     // the event ids are consecutive
1327                     wxMouseEvent
1328                         evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1329
1330                     InitMouseEvent(evtMouse,
1331                                    GET_X_LPARAM(enlink->lParam),
1332                                    GET_Y_LPARAM(enlink->lParam),
1333                                    enlink->wParam);
1334
1335                     wxTextUrlEvent event(m_windowId, evtMouse,
1336                                          enlink->chrg.cpMin,
1337                                          enlink->chrg.cpMax);
1338
1339                     InitCommandEvent(event);
1340
1341                     *result = ProcessCommand(event);
1342                 }
1343                 break;
1344         }
1345
1346         return TRUE;
1347     }
1348
1349     // not processed
1350     return FALSE;
1351 }
1352
1353 // ----------------------------------------------------------------------------
1354 // colour setting for the rich edit controls
1355 // ----------------------------------------------------------------------------
1356
1357 // Watcom C++ doesn't define this
1358 #ifndef SCF_ALL
1359 #define SCF_ALL 0x0004
1360 #endif
1361
1362 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1363 {
1364     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1365     {
1366         // colour didn't really change
1367         return FALSE;
1368     }
1369
1370     if ( IsRich() )
1371     {
1372         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1373         // EM_SETBKGNDCOLOR additionally
1374         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1375     }
1376
1377     return TRUE;
1378 }
1379
1380 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1381 {
1382     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1383     {
1384         // colour didn't really change
1385         return FALSE;
1386     }
1387
1388     if ( IsRich() )
1389     {
1390         // change the colour of everything
1391         CHARFORMAT cf;
1392         wxZeroMemory(cf);
1393         cf.cbSize = sizeof(cf);
1394         cf.dwMask = CFM_COLOR;
1395         cf.crTextColor = wxColourToRGB(colour);
1396         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1397     }
1398
1399     return TRUE;
1400 }
1401
1402 // ----------------------------------------------------------------------------
1403 // styling support for rich edit controls
1404 // ----------------------------------------------------------------------------
1405
1406 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1407 {
1408     if ( !IsRich() )
1409     {
1410         // can't do it with normal text control
1411         return FALSE;
1412     }
1413
1414     // the rich text control doesn't handle setting background colour, so don't
1415     // even try if it's the only thing we want to change
1416     if ( wxRichEditModule::GetLoadedVersion() < 2 &&
1417          !style.HasFont() && !style.HasTextColour() )
1418     {
1419         // nothing to do: return TRUE if there was really nothing to do and
1420         // FALSE if we failed to set bg colour
1421         return !style.HasBackgroundColour();
1422     }
1423
1424     // order the range if needed
1425     if ( start > end )
1426     {
1427         long tmp = start;
1428         start = end;
1429         end = tmp;
1430     }
1431
1432     // we can only change the format of the selection, so select the range we
1433     // want and restore the old selection later
1434     long startOld, endOld;
1435     GetSelection(&startOld, &endOld);
1436
1437     // but do we really have to change the selection?
1438     bool changeSel = start != startOld || end != endOld;
1439
1440     if ( changeSel )
1441         SendMessage(GetHwnd(), EM_SETSEL, (WPARAM) start, (LPARAM) end);
1442
1443     // initialize CHARFORMAT struct
1444 #if wxUSE_RICHEDIT2
1445     CHARFORMAT2 cf;
1446 #else
1447     CHARFORMAT cf;
1448 #endif
1449     wxZeroMemory(cf);
1450     cf.cbSize = sizeof(cf);
1451
1452     if ( style.HasFont() )
1453     {
1454         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1455                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1456
1457         // fill in data from LOGFONT but recalculate lfHeight because we need
1458         // the real height in twips and not the negative number which
1459         // wxFillLogFont() returns (this is correct in general and works with
1460         // the Windows font mapper, but not here)
1461         LOGFONT lf;
1462         wxFillLogFont(&lf, &style.GetFont());
1463         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1464         cf.bCharSet = lf.lfCharSet;
1465         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1466         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1467
1468         // also deal with underline/italic/bold attributes: note that we must
1469         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1470         // style to allow clearing it
1471         if ( lf.lfItalic )
1472         {
1473             cf.dwEffects |= CFE_ITALIC;
1474         }
1475
1476         if ( lf.lfWeight == FW_BOLD )
1477         {
1478             cf.dwEffects |= CFE_BOLD;
1479         }
1480
1481         if ( lf.lfUnderline )
1482         {
1483             cf.dwEffects |= CFE_UNDERLINE;
1484         }
1485
1486         // strikeout fonts are not supported by wxWindows
1487     }
1488
1489     if ( style.HasTextColour() )
1490     {
1491         cf.dwMask |= CFM_COLOR;
1492         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1493     }
1494
1495 #if wxUSE_RICHEDIT2
1496     if ( wxRichEditModule::GetLoadedVersion() > 1 && style.HasBackgroundColour() )
1497     {
1498         cf.dwMask |= CFM_BACKCOLOR;
1499         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1500     }
1501 #endif // wxUSE_RICHEDIT2
1502
1503     // do format the selection
1504     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1505                             SCF_SELECTION, (LPARAM)&cf) != 0;
1506     if ( !ok )
1507     {
1508         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1509     }
1510
1511     if ( changeSel )
1512     {
1513         // restore the original selection
1514         SendMessage(GetHwnd(), EM_SETSEL, (WPARAM)startOld, (LPARAM)endOld);
1515     }
1516
1517     return ok;
1518 }
1519
1520 // ----------------------------------------------------------------------------
1521 // wxRichEditModule
1522 // ----------------------------------------------------------------------------
1523
1524 bool wxRichEditModule::OnInit()
1525 {
1526     // don't do anything - we will load it when needed
1527     return TRUE;
1528 }
1529
1530 void wxRichEditModule::OnExit()
1531 {
1532     if ( ms_hRichEdit )
1533     {
1534         FreeLibrary(ms_hRichEdit);
1535     }
1536 }
1537
1538 /* static */
1539 bool wxRichEditModule::Load(int version)
1540 {
1541     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1542                  _T("incorrect richedit control version requested") );
1543
1544     if ( version <= ms_verRichEdit )
1545     {
1546         // we've already got this or better
1547         return TRUE;
1548     }
1549
1550     if ( ms_hRichEdit )
1551     {
1552         ::FreeLibrary(ms_hRichEdit);
1553     }
1554
1555     // always try load riched20.dll first - like this we won't have to reload
1556     // it later if we're first asked for RE 1 and then for RE 2 or 3
1557     wxString dllname = _T("riched20.dll");
1558     ms_hRichEdit = ::LoadLibrary(dllname);
1559     ms_verRichEdit = 2; // no way to tell if it's 2 or 3, assume 2
1560
1561     if ( !ms_hRichEdit && (version == 1) )
1562     {
1563         // fall back to RE 1
1564         dllname = _T("riched32.dll");
1565         ms_hRichEdit = ::LoadLibrary(dllname);
1566         ms_verRichEdit = 1;
1567     }
1568
1569     if ( !ms_hRichEdit )
1570     {
1571         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1572
1573         ms_verRichEdit = -1;
1574
1575         return FALSE;
1576     }
1577
1578     return TRUE;
1579 }
1580
1581 #endif // wxUSE_RICHEDIT
1582
1583 #endif // wxUSE_TEXTCTRL