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 // ----------------------------------------------------------------------------
  73 // private classes
  74 // ----------------------------------------------------------------------------
  75
  76 #if wxUSE_RICHEDIT
  77
  78 // this module initializes RichEdit DLL if needed
  79 class wxRichEditModule : public wxModule
  80 {
  81 public:
  82     virtual bool OnInit();
  83     virtual void OnExit();
  84
  85     // get the version currently loaded, -1 if none
  86     static int GetLoadedVersion() { return ms_verRichEdit; }
  87
  88     // load the richedit DLL of at least of required version
  89     static bool Load(int version = 1);
  90
  91 private:
  92     // the handle to richedit DLL and the version of the DLL loaded
  93     static HINSTANCE ms_hRichEdit;
  94
  95     // the DLL version loaded or -1 if none
  96     static int ms_verRichEdit;
  97
  98     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
  99 };
 100
 101 HINSTANCE wxRichEditModule::ms_hRichEdit = (HINSTANCE)NULL;
 102 int       wxRichEditModule::ms_verRichEdit = -1;
 103
 104 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 105
 106 #endif // wxUSE_RICHEDIT
 107
 108 // ----------------------------------------------------------------------------
 109 // event tables and other macros
 110 // ----------------------------------------------------------------------------
 111
 112 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 113
 114 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 115     EVT_CHAR(wxTextCtrl::OnChar)
 116     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 117
 118     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 119     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 120     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 121     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 122     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 123
 124     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 125     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 126     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 127     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 128     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 129 #ifdef __WIN16__
 130     EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
 131 #endif
 132 END_EVENT_TABLE()
 133
 134 // ============================================================================
 135 // implementation
 136 // ============================================================================
 137
 138 // ----------------------------------------------------------------------------
 139 // creation
 140 // ----------------------------------------------------------------------------
 141
 142 wxTextCtrl::wxTextCtrl()
 143 {
 144 #if wxUSE_RICHEDIT
 145     m_isRich = FALSE;
 146 #endif
 147 }
 148
 149 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 150                         const wxString& value,
 151                         const wxPoint& pos,
 152                         const wxSize& size,
 153                         long style,
 154                         const wxValidator& validator,
 155                         const wxString& name)
 156 {
 157     // base initialization
 158     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 159         return FALSE;
 160
 161     if ( parent )
 162         parent->AddChild(this);
 163
 164     // translate wxWin style flags to MSW ones, checking for consistency while
 165     // doing it
 166     long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 167
 168     if ( m_windowStyle & wxCLIP_SIBLINGS )
 169         msStyle |= WS_CLIPSIBLINGS;
 170
 171     if ( m_windowStyle & wxTE_MULTILINE )
 172     {
 173         wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
 174                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 175
 176         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 177         if ((m_windowStyle & wxTE_NO_VSCROLL) == 0)
 178             msStyle |= WS_VSCROLL;
 179         m_windowStyle |= wxTE_PROCESS_ENTER;
 180     }
 181     else
 182         msStyle |= ES_AUTOHSCROLL;
 183
 184     if (m_windowStyle & wxHSCROLL)
 185         msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL);
 186
 187     if (m_windowStyle & wxTE_READONLY)
 188         msStyle |= ES_READONLY;
 189
 190     if (m_windowStyle & wxTE_PASSWORD) // hidden input
 191         msStyle |= ES_PASSWORD;
 192
 193    if (m_windowStyle & wxTE_AUTO_SCROLL)
 194         msStyle |=  ES_AUTOHSCROLL;
 195
 196
 197     // we always want the characters and the arrows
 198     m_lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
 199
 200     // we may have several different cases:
 201     // 1. normal case: both TAB and ENTER are used for dialog navigation
 202     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
 203     //    control in the dialog
 204     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
 205     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
 206     //    the next control
 207     if ( m_windowStyle & wxTE_PROCESS_ENTER )
 208         m_lDlgCode |= DLGC_WANTMESSAGE;
 209     if ( m_windowStyle & wxTE_PROCESS_TAB )
 210         m_lDlgCode |= DLGC_WANTTAB;
 211
 212     // do create the control - either an EDIT or RICHEDIT
 213     wxString windowClass = wxT("EDIT");
 214
 215 #if wxUSE_RICHEDIT
 216     if ( m_windowStyle & wxTE_RICH )
 217     {
 218         static bool s_errorGiven = FALSE;   // MT-FIXME
 219
 220         // only give the error msg once if the DLL can't be loaded
 221         if ( !s_errorGiven )
 222         {
 223             // first try to load the RichEdit DLL (will do nothing if already
 224             // done)
 225             if ( !wxRichEditModule::Load() )
 226             {
 227                 wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 228
 229                 s_errorGiven = TRUE;
 230             }
 231         }
 232
 233         if ( s_errorGiven )
 234         {
 235             m_isRich = FALSE;
 236         }
 237         else
 238         {
 239             msStyle |= ES_AUTOVSCROLL;
 240             m_isRich = TRUE;
 241
 242             int ver = wxRichEditModule::GetLoadedVersion();
 243             if ( ver == 1 )
 244             {
 245                 windowClass = wxT("RICHEDIT");
 246             }
 247             else
 248             {
 249 #ifndef RICHEDIT_CLASS
 250                 wxString RICHEDIT_CLASS;
 251                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), ver);
 252 #if wxUSE_UNICODE
 253                 RICHEDIT_CLASS += _T('W');
 254 #else // ANSI
 255                 RICHEDIT_CLASS += _T('A');
 256 #endif // Unicode/ANSI
 257 #endif // !RICHEDIT_CLASS
 258
 259                 windowClass = RICHEDIT_CLASS;
 260             }
 261         }
 262     }
 263     else
 264         m_isRich = FALSE;
 265 #endif // wxUSE_RICHEDIT
 266
 267     bool want3D;
 268     WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
 269
 270     // Even with extended styles, need to combine with WS_BORDER for them to
 271     // look right.
 272     if ( want3D || wxStyleHasBorder(m_windowStyle) )
 273         msStyle |= WS_BORDER;
 274
 275     // NB: don't use pos and size as CreateWindowEx arguments because they
 276     //     might be -1 in which case we should use the default values (and
 277     //     SetSize called below takes care of it)
 278     m_hWnd = (WXHWND)::CreateWindowEx(exStyle,
 279                                       windowClass.c_str(),
 280                                       NULL,
 281                                       msStyle,
 282                                       0, 0, 0, 0,
 283                                       GetHwndOf(parent),
 284                                       (HMENU)m_windowId,
 285                                       wxGetInstance(),
 286                                       NULL);
 287
 288     wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create text ctrl") );
 289
 290 #if wxUSE_CTL3D
 291     if ( want3D )
 292     {
 293         Ctl3dSubclassCtl(GetHwnd());
 294         m_useCtl3D = TRUE;
 295     }
 296 #endif
 297
 298 #if wxUSE_RICHEDIT
 299     if (m_isRich)
 300     {
 301         // have to enable events manually
 302         LPARAM mask = ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE;
 303
 304         if ( m_windowStyle & wxTE_AUTO_URL )
 305         {
 306             mask |= ENM_LINK;
 307
 308             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 309         }
 310
 311         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 312     }
 313 #endif // wxUSE_RICHEDIT
 314
 315     SubclassWin(GetHWND());
 316
 317     // set font, position, size and initial value
 318     wxFont& fontParent = parent->GetFont();
 319     if ( fontParent.Ok() )
 320     {
 321         SetFont(fontParent);
 322     }
 323     else
 324     {
 325         SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 326     }
 327
 328     // Causes a crash for Symantec C++ and WIN32 for some reason
 329 #if !(defined(__SC__) && defined(__WIN32__))
 330     if ( !value.IsEmpty() )
 331     {
 332         SetValue(value);
 333     }
 334 #endif
 335
 336     // set colours
 337     SetupColours();
 338
 339     SetSize(pos.x, pos.y, size.x, size.y);
 340
 341     return TRUE;
 342 }
 343
 344 // Make sure the window style (etc.) reflects the HWND style (roughly)
 345 void wxTextCtrl::AdoptAttributesFromHWND()
 346 {
 347   wxWindow::AdoptAttributesFromHWND();
 348
 349   HWND hWnd = GetHwnd();
 350   long style = GetWindowLong(hWnd, GWL_STYLE);
 351
 352   // retrieve the style to see whether this is an edit or richedit ctrl
 353 #if wxUSE_RICHEDIT
 354   wxChar buf[256];
 355
 356   GetClassName(hWnd, buf, WXSIZEOF(buf));
 357
 358   if ( wxStricmp(buf, wxT("EDIT")) == 0 )
 359     m_isRich = FALSE;
 360   else
 361     m_isRich = TRUE;
 362 #endif // wxUSE_RICHEDIT
 363
 364   if (style & ES_MULTILINE)
 365     m_windowStyle |= wxTE_MULTILINE;
 366   if (style & ES_PASSWORD)
 367     m_windowStyle |= wxTE_PASSWORD;
 368   if (style & ES_READONLY)
 369     m_windowStyle |= wxTE_READONLY;
 370   if (style & ES_WANTRETURN)
 371     m_windowStyle |= wxTE_PROCESS_ENTER;
 372 }
 373
 374 void wxTextCtrl::SetupColours()
 375 {
 376     wxColour bkgndColour;
 377 //    if (IsEditable() || (m_windowStyle & wxTE_MULTILINE))
 378         bkgndColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
 379 //    else
 380 //        bkgndColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
 381
 382     SetBackgroundColour(bkgndColour);
 383     SetForegroundColour(GetParent()->GetForegroundColour());
 384 }
 385
 386 // ----------------------------------------------------------------------------
 387 // set/get the controls text
 388 // ----------------------------------------------------------------------------
 389
 390 wxString wxTextCtrl::GetValue() const
 391 {
 392     // we can't use wxGetWindowText() (i.e. WM_GETTEXT internally) for
 393     // retrieving more than 64Kb under Win9x
 394 #if wxUSE_RICHEDIT
 395     if ( m_isRich )
 396     {
 397         wxString str;
 398
 399         int len = GetWindowTextLength(GetHwnd());
 400         if ( len )
 401         {
 402             // alloc one extra WORD as needed by the control
 403             wxChar *p = str.GetWriteBuf(++len);
 404
 405             TEXTRANGE textRange;
 406             textRange.chrg.cpMin = 0;
 407             textRange.chrg.cpMax = -1;
 408             textRange.lpstrText = p;
 409
 410             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 411
 412             // believe it or not, but EM_GETTEXTRANGE uses just CR ('\r') for
 413             // the newlines which is neither Unix nor Windows style (Win95 with
 414             // riched20.dll shows this behaviour) - convert it to something
 415             // reasonable
 416             for ( ; *p; p++ )
 417             {
 418                 if ( *p == _T('\r') )
 419                     *p = _T('\n');
 420             }
 421
 422             str.UngetWriteBuf();
 423         }
 424         //else: no text at all, leave the string empty
 425
 426         return str;
 427     }
 428 #endif // wxUSE_RICHEDIT
 429
 430     // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 431     // same one as above for consitency
 432     wxString str = wxGetWindowText(GetHWND());
 433
 434     return wxTextFile::Translate(str, wxTextFileType_Unix);
 435 }
 436
 437 void wxTextCtrl::SetValue(const wxString& value)
 438 {
 439     // if the text is long enough, it's faster to just set it instead of first
 440     // comparing it with the old one (chances are that it will be different
 441     // anyhow, this comparison is there to avoid flicker for small single-line
 442     // edit controls mostly)
 443     if ( (value.length() > 0x400) || (value != GetValue()) )
 444     {
 445         wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 446
 447         SetWindowText(GetHwnd(), valueDos.c_str());
 448
 449         // for compatibility with the GTK and because it is more logical, we
 450         // move the cursor to the end of the text after SetValue()
 451
 452         // GRG, Jun/2000: Changed this back after a lot of discussion
 453         //   in the lists. wxWindows 2.2 will have a set of flags to
 454         //   customize this behaviour.
 455         //SetInsertionPointEnd();
 456
 457         AdjustSpaceLimit();
 458     }
 459 }
 460
 461 void wxTextCtrl::WriteText(const wxString& value)
 462 {
 463     wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 464
 465 #if wxUSE_RICHEDIT
 466     // ensure that the new text will be in the default style
 467     if ( IsRich() &&
 468             (m_defaultStyle.HasFont() || m_defaultStyle.HasTextColour()) )
 469     {
 470         long start, end;
 471         GetSelection(&start, &end);
 472         SetStyle(start, end, m_defaultStyle );
 473     }
 474 #endif // wxUSE_RICHEDIT
 475
 476     SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
 477
 478     AdjustSpaceLimit();
 479 }
 480
 481 void wxTextCtrl::AppendText(const wxString& text)
 482 {
 483     SetInsertionPointEnd();
 484     WriteText(text);
 485 }
 486
 487 void wxTextCtrl::Clear()
 488 {
 489     SetWindowText(GetHwnd(), wxT(""));
 490 }
 491
 492 // ----------------------------------------------------------------------------
 493 // Clipboard operations
 494 // ----------------------------------------------------------------------------
 495
 496 void wxTextCtrl::Copy()
 497 {
 498     if (CanCopy())
 499     {
 500         HWND hWnd = GetHwnd();
 501         SendMessage(hWnd, WM_COPY, 0, 0L);
 502     }
 503 }
 504
 505 void wxTextCtrl::Cut()
 506 {
 507     if (CanCut())
 508     {
 509         HWND hWnd = GetHwnd();
 510         SendMessage(hWnd, WM_CUT, 0, 0L);
 511     }
 512 }
 513
 514 void wxTextCtrl::Paste()
 515 {
 516     if (CanPaste())
 517     {
 518         HWND hWnd = GetHwnd();
 519         SendMessage(hWnd, WM_PASTE, 0, 0L);
 520     }
 521 }
 522
 523 bool wxTextCtrl::CanCopy() const
 524 {
 525     // Can copy if there's a selection
 526     long from, to;
 527     GetSelection(& from, & to);
 528     return (from != to) ;
 529 }
 530
 531 bool wxTextCtrl::CanCut() const
 532 {
 533     // Can cut if there's a selection
 534     long from, to;
 535     GetSelection(& from, & to);
 536     return (from != to) && (IsEditable());
 537 }
 538
 539 bool wxTextCtrl::CanPaste() const
 540 {
 541 #if wxUSE_RICHEDIT
 542     if (m_isRich)
 543     {
 544         int dataFormat = 0; // 0 == any format
 545         return (::SendMessage( GetHwnd(), EM_CANPASTE, (WPARAM) (UINT) dataFormat, 0) != 0);
 546     }
 547 #endif
 548     if (!IsEditable())
 549         return FALSE;
 550
 551     // Standard edit control: check for straight text on clipboard
 552     bool isTextAvailable = FALSE;
 553     if ( ::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 554     {
 555         isTextAvailable = (::IsClipboardFormatAvailable(CF_TEXT) != 0);
 556         ::CloseClipboard();
 557     }
 558
 559     return isTextAvailable;
 560 }
 561
 562 // ----------------------------------------------------------------------------
 563 // Accessors
 564 // ----------------------------------------------------------------------------
 565
 566 void wxTextCtrl::SetEditable(bool editable)
 567 {
 568     HWND hWnd = GetHwnd();
 569     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 570 }
 571
 572 void wxTextCtrl::SetInsertionPoint(long pos)
 573 {
 574     HWND hWnd = GetHwnd();
 575 #ifdef __WIN32__
 576 #if wxUSE_RICHEDIT
 577     if ( m_isRich)
 578     {
 579         CHARRANGE range;
 580         range.cpMin = pos;
 581         range.cpMax = pos;
 582         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 583         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 584     }
 585     else
 586 #endif // wxUSE_RICHEDIT
 587     {
 588         SendMessage(hWnd, EM_SETSEL, pos, pos);
 589         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 590     }
 591 #else // Win16
 592     SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 593 #endif // Win32/16
 594
 595     static const wxChar *nothing = _T("");
 596     SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 597 }
 598
 599 void wxTextCtrl::SetInsertionPointEnd()
 600 {
 601     long pos = GetLastPosition();
 602     SetInsertionPoint(pos);
 603 }
 604
 605 long wxTextCtrl::GetInsertionPoint() const
 606 {
 607 #if wxUSE_RICHEDIT
 608     if (m_isRich)
 609     {
 610         CHARRANGE range;
 611         range.cpMin = 0;
 612         range.cpMax = 0;
 613         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 614         return range.cpMin;
 615     }
 616 #endif
 617
 618     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 619     return Pos & 0xFFFF;
 620 }
 621
 622 long wxTextCtrl::GetLastPosition() const
 623 {
 624     HWND hWnd = GetHwnd();
 625
 626     // Will always return a number > 0 (according to docs)
 627     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 628
 629     // This gets the char index for the _beginning_ of the last line
 630     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 631
 632     // Get number of characters in the last line. We'll add this to the character
 633     // index for the last line, 1st position.
 634     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 635
 636     return (long)(charIndex + lineLength);
 637 }
 638
 639 // If the return values from and to are the same, there is no
 640 // selection.
 641 void wxTextCtrl::GetSelection(long* from, long* to) const
 642 {
 643 #if wxUSE_RICHEDIT
 644     if (m_isRich)
 645     {
 646         CHARRANGE charRange;
 647         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) (CHARRANGE*) & charRange);
 648
 649         *from = charRange.cpMin;
 650         *to = charRange.cpMax;
 651     }
 652     else
 653 #endif // rich/!rich
 654     {
 655         DWORD dwStart, dwEnd;
 656         WPARAM wParam = (WPARAM) &dwStart; // receives starting position
 657         LPARAM lParam = (LPARAM) &dwEnd;   // receives ending position
 658
 659         ::SendMessage(GetHwnd(), EM_GETSEL, wParam, lParam);
 660
 661         *from = dwStart;
 662         *to = dwEnd;
 663     }
 664 }
 665
 666 bool wxTextCtrl::IsEditable() const
 667 {
 668     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 669
 670     return ((style & ES_READONLY) == 0);
 671 }
 672
 673 // ----------------------------------------------------------------------------
 674 // Editing
 675 // ----------------------------------------------------------------------------
 676
 677 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 678 {
 679 #if wxUSE_CLIPBOARD
 680     HWND hWnd = GetHwnd();
 681     long fromChar = from;
 682     long toChar = to;
 683
 684     // Set selection and remove it
 685 #ifdef __WIN32__
 686     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 687 #else
 688     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 689 #endif
 690     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 691
 692     // Now replace with 'value', by pasting.
 693     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const wxChar *)value, 0, 0);
 694
 695     // Paste into edit control
 696     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 697 #else
 698     wxFAIL_MSG("wxTextCtrl::Replace not implemented if wxUSE_CLIPBOARD is 0.");
 699 #endif
 700 }
 701
 702 void wxTextCtrl::Remove(long from, long to)
 703 {
 704     HWND hWnd = GetHwnd();
 705     long fromChar = from;
 706     long toChar = to;
 707
 708     // Cut all selected text
 709 #ifdef __WIN32__
 710     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 711 #else
 712     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 713 #endif
 714     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 715 }
 716
 717 void wxTextCtrl::SetSelection(long from, long to)
 718 {
 719     HWND hWnd = GetHwnd();
 720     long fromChar = from;
 721     long toChar = to;
 722
 723     // if from and to are both -1, it means (in wxWindows) that all text should
 724     // be selected. Translate into Windows convention
 725     if ((from == -1) && (to == -1))
 726     {
 727       fromChar = 0;
 728       toChar = -1;
 729     }
 730
 731 #ifdef __WIN32__
 732     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 733     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 734 #else
 735     // WPARAM is 0: selection is scrolled into view
 736     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 737 #endif
 738 }
 739
 740 bool wxTextCtrl::LoadFile(const wxString& file)
 741 {
 742     if ( wxTextCtrlBase::LoadFile(file) )
 743     {
 744         // update the size limit if needed
 745         AdjustSpaceLimit();
 746
 747         return TRUE;
 748     }
 749
 750     return FALSE;
 751 }
 752
 753 bool wxTextCtrl::IsModified() const
 754 {
 755     return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
 756 }
 757
 758 // Makes 'unmodified'
 759 void wxTextCtrl::DiscardEdits()
 760 {
 761     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 762 }
 763
 764 int wxTextCtrl::GetNumberOfLines() const
 765 {
 766     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 767 }
 768
 769 long wxTextCtrl::XYToPosition(long x, long y) const
 770 {
 771     HWND hWnd = GetHwnd();
 772
 773     // This gets the char index for the _beginning_ of this line
 774     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 775     return (long)(x + charIndex);
 776 }
 777
 778 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 779 {
 780     HWND hWnd = GetHwnd();
 781
 782     // This gets the line number containing the character
 783     int lineNo;
 784 #if wxUSE_RICHEDIT
 785     if ( m_isRich )
 786     {
 787         lineNo = (int)SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
 788     }
 789     else
 790 #endif // wxUSE_RICHEDIT
 791         lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
 792
 793     if ( lineNo == -1 )
 794     {
 795         // no such line
 796         return FALSE;
 797     }
 798
 799     // This gets the char index for the _beginning_ of this line
 800     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 801     if ( charIndex == -1 )
 802     {
 803         return FALSE;
 804     }
 805
 806     // The X position must therefore be the different between pos and charIndex
 807     if ( x )
 808         *x = (long)(pos - charIndex);
 809     if ( y )
 810         *y = (long)lineNo;
 811
 812     return TRUE;
 813 }
 814
 815 void wxTextCtrl::ShowPosition(long pos)
 816 {
 817     HWND hWnd = GetHwnd();
 818
 819     // To scroll to a position, we pass the number of lines and characters
 820     // to scroll *by*. This means that we need to:
 821     // (1) Find the line position of the current line.
 822     // (2) Find the line position of pos.
 823     // (3) Scroll by (pos - current).
 824     // For now, ignore the horizontal scrolling.
 825
 826     // Is this where scrolling is relative to - the line containing the caret?
 827     // Or is the first visible line??? Try first visible line.
 828 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 829
 830     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 831
 832     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 833
 834     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 835
 836     if (linesToScroll != 0)
 837       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 838 }
 839
 840 int wxTextCtrl::GetLineLength(long lineNo) const
 841 {
 842     long charIndex = XYToPosition(0, lineNo);
 843     int len = (int)SendMessage(GetHwnd(), EM_LINELENGTH, charIndex, 0);
 844     return len;
 845 }
 846
 847 wxString wxTextCtrl::GetLineText(long lineNo) const
 848 {
 849     size_t len = (size_t)GetLineLength(lineNo) + 1;
 850
 851     // there must be at least enough place for the length WORD in the
 852     // buffer
 853     len += sizeof(WORD);
 854
 855     wxString str;
 856     wxChar *buf = str.GetWriteBuf(len);
 857
 858     *(WORD *)buf = (WORD)len;
 859     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
 860     buf[len] = 0;
 861
 862     str.UngetWriteBuf(len);
 863
 864     return str;
 865 }
 866
 867 // ----------------------------------------------------------------------------
 868 // Undo/redo
 869 // ----------------------------------------------------------------------------
 870
 871 void wxTextCtrl::Undo()
 872 {
 873     if (CanUndo())
 874     {
 875         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 876     }
 877 }
 878
 879 void wxTextCtrl::Redo()
 880 {
 881     if (CanRedo())
 882     {
 883         // Same as Undo, since Undo undoes the undo, i.e. a redo.
 884         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 885     }
 886 }
 887
 888 bool wxTextCtrl::CanUndo() const
 889 {
 890     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 891 }
 892
 893 bool wxTextCtrl::CanRedo() const
 894 {
 895     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 896 }
 897
 898 // ----------------------------------------------------------------------------
 899 // implemenation details
 900 // ----------------------------------------------------------------------------
 901
 902 void wxTextCtrl::Command(wxCommandEvent & event)
 903 {
 904     SetValue(event.GetString());
 905     ProcessCommand (event);
 906 }
 907
 908 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 909 {
 910     // By default, load the first file into the text window.
 911     if (event.GetNumberOfFiles() > 0)
 912     {
 913         LoadFile(event.GetFiles()[0]);
 914     }
 915 }
 916
 917 void wxTextCtrl::OnChar(wxKeyEvent& event)
 918 {
 919     switch ( event.KeyCode() )
 920     {
 921         case WXK_RETURN:
 922             if ( !(m_windowStyle & wxTE_MULTILINE) )
 923             {
 924                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 925                 InitCommandEvent(event);
 926                 event.SetString(GetValue());
 927                 if ( GetEventHandler()->ProcessEvent(event) )
 928                     return;
 929             }
 930             //else: multiline controls need Enter for themselves
 931
 932             break;
 933
 934         case WXK_TAB:
 935             // always produce navigation event - even if we process TAB
 936             // ourselves the fact that we got here means that the user code
 937             // decided to skip processing of this TAB - probably to let it
 938             // do its default job.
 939             {
 940                 wxNavigationKeyEvent eventNav;
 941                 eventNav.SetDirection(!event.ShiftDown());
 942                 eventNav.SetWindowChange(event.ControlDown());
 943                 eventNav.SetEventObject(this);
 944
 945                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
 946                     return;
 947             }
 948             break;
 949     }
 950
 951     // no, we didn't process it
 952     event.Skip();
 953 }
 954
 955 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 956 {
 957     switch (param)
 958     {
 959         case EN_SETFOCUS:
 960         case EN_KILLFOCUS:
 961             {
 962                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
 963                         : wxEVT_SET_FOCUS,
 964                         m_windowId);
 965                 event.SetEventObject( this );
 966                 GetEventHandler()->ProcessEvent(event);
 967             }
 968             break;
 969
 970         case EN_CHANGE:
 971             {
 972                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
 973                 InitCommandEvent(event);
 974                 event.SetString(GetValue());
 975                 ProcessCommand(event);
 976             }
 977             break;
 978
 979         case EN_MAXTEXT:
 980             // the text size limit has been hit - increase it
 981             AdjustSpaceLimit();
 982             break;
 983
 984             // the other notification messages are not processed
 985         case EN_UPDATE:
 986         case EN_ERRSPACE:
 987         case EN_HSCROLL:
 988         case EN_VSCROLL:
 989             return FALSE;
 990         default:
 991             return FALSE;
 992     }
 993
 994     // processed
 995     return TRUE;
 996 }
 997
 998 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
 999 #if wxUSE_CTL3D
1000                                WXUINT message,
1001                                WXWPARAM wParam,
1002                                WXLPARAM lParam
1003 #else
1004                                WXUINT WXUNUSED(message),
1005                                WXWPARAM WXUNUSED(wParam),
1006                                WXLPARAM WXUNUSED(lParam)
1007 #endif
1008     )
1009 {
1010 #if wxUSE_CTL3D
1011     if ( m_useCtl3D )
1012     {
1013         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1014         return (WXHBRUSH) hbrush;
1015     }
1016 #endif // wxUSE_CTL3D
1017
1018     HDC hdc = (HDC)pDC;
1019     if (GetParent()->GetTransparentBackground())
1020         SetBkMode(hdc, TRANSPARENT);
1021     else
1022         SetBkMode(hdc, OPAQUE);
1023
1024     wxColour colBack = GetBackgroundColour();
1025
1026     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1027         colBack = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
1028
1029     ::SetBkColor(hdc, wxColourToRGB(colBack));
1030     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1031
1032     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1033
1034     return (WXHBRUSH)brush->GetResourceHandle();
1035 }
1036
1037 // In WIN16, need to override normal erasing because
1038 // Ctl3D doesn't use the wxWindows background colour.
1039 #ifdef __WIN16__
1040 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1041 {
1042     wxColour col(m_backgroundColour);
1043
1044 #if wxUSE_CTL3D
1045     if (m_useCtl3D)
1046         col = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
1047 #endif
1048
1049     RECT rect;
1050     ::GetClientRect(GetHwnd(), &rect);
1051
1052     COLORREF ref = PALETTERGB(col.Red(),
1053                               col.Green(),
1054                               col.Blue());
1055     HBRUSH hBrush = ::CreateSolidBrush(ref);
1056     if ( !hBrush )
1057         wxLogLastError(wxT("CreateSolidBrush"));
1058
1059     HDC hdc = (HDC)event.GetDC()->GetHDC();
1060
1061     int mode = ::SetMapMode(hdc, MM_TEXT);
1062
1063     ::FillRect(hdc, &rect, hBrush);
1064     ::DeleteObject(hBrush);
1065     ::SetMapMode(hdc, mode);
1066
1067 }
1068 #endif
1069
1070 void wxTextCtrl::AdjustSpaceLimit()
1071 {
1072 #ifndef __WIN16__
1073     unsigned int len = ::GetWindowTextLength(GetHwnd()),
1074     limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1075     if ( len >= limit )
1076     {
1077         limit = len + 0x8000;    // 32Kb
1078
1079 #if wxUSE_RICHEDIT
1080         if ( m_isRich )
1081         {
1082             // as a nice side effect, this also allows passing limit > 64Kb
1083             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1084         }
1085         else
1086 #endif // wxUSE_RICHEDIT
1087         {
1088             if ( limit > 0xffff )
1089             {
1090                 // this will set it to a platform-dependent maximum (much more
1091                 // than 64Kb under NT)
1092                 limit = 0;
1093             }
1094
1095             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1096         }
1097     }
1098 #endif // !Win16
1099 }
1100
1101 bool wxTextCtrl::AcceptsFocus() const
1102 {
1103     // we don't want focus if we can't be edited
1104     return IsEditable() && wxControl::AcceptsFocus();
1105 }
1106
1107 wxSize wxTextCtrl::DoGetBestSize() const
1108 {
1109     int cx, cy;
1110     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1111
1112     int wText = DEFAULT_ITEM_WIDTH;
1113
1114     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1115     if ( m_windowStyle & wxTE_MULTILINE )
1116     {
1117         hText *= wxMax(GetNumberOfLines(), 5);
1118     }
1119     //else: for single line control everything is ok
1120
1121     return wxSize(wText, hText);
1122 }
1123
1124 // ----------------------------------------------------------------------------
1125 // standard handlers for standard edit menu events
1126 // ----------------------------------------------------------------------------
1127
1128 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1129 {
1130     Cut();
1131 }
1132
1133 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1134 {
1135     Copy();
1136 }
1137
1138 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1139 {
1140     Paste();
1141 }
1142
1143 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1144 {
1145     Undo();
1146 }
1147
1148 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1149 {
1150     Redo();
1151 }
1152
1153 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1154 {
1155     event.Enable( CanCut() );
1156 }
1157
1158 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1159 {
1160     event.Enable( CanCopy() );
1161 }
1162
1163 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1164 {
1165     event.Enable( CanPaste() );
1166 }
1167
1168 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1169 {
1170     event.Enable( CanUndo() );
1171 }
1172
1173 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1174 {
1175     event.Enable( CanRedo() );
1176 }
1177
1178 // the rest of the file only deals with the rich edit controls
1179 #if wxUSE_RICHEDIT
1180
1181 // ----------------------------------------------------------------------------
1182 // EN_LINK processing
1183 // ----------------------------------------------------------------------------
1184
1185 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1186 {
1187     NMHDR *hdr = (NMHDR* )lParam;
1188     if ( hdr->code == EN_LINK )
1189     {
1190         ENLINK *enlink = (ENLINK *)hdr;
1191
1192         switch ( enlink->msg )
1193         {
1194             case WM_SETCURSOR:
1195                 // ok, so it is hardcoded - do we really nee to customize it?
1196                 ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1197                 *result = TRUE;
1198                 break;
1199
1200             case WM_MOUSEMOVE:
1201             case WM_LBUTTONDOWN:
1202             case WM_LBUTTONUP:
1203             case WM_LBUTTONDBLCLK:
1204             case WM_RBUTTONDOWN:
1205             case WM_RBUTTONUP:
1206             case WM_RBUTTONDBLCLK:
1207                 // send a mouse event
1208                 {
1209                     static const wxEventType eventsMouse[] =
1210                     {
1211                         wxEVT_MOTION,
1212                         wxEVT_LEFT_DOWN,
1213                         wxEVT_LEFT_UP,
1214                         wxEVT_LEFT_DCLICK,
1215                         wxEVT_RIGHT_DOWN,
1216                         wxEVT_RIGHT_UP,
1217                         wxEVT_RIGHT_DCLICK,
1218                     };
1219
1220                     // the event ids are consecutive
1221                     wxMouseEvent
1222                         evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1223
1224                     InitMouseEvent(evtMouse,
1225                                    GET_X_LPARAM(enlink->lParam),
1226                                    GET_Y_LPARAM(enlink->lParam),
1227                                    enlink->wParam);
1228
1229                     wxTextUrlEvent event(m_windowId, evtMouse,
1230                                          enlink->chrg.cpMin,
1231                                          enlink->chrg.cpMax);
1232
1233                     InitCommandEvent(event);
1234
1235                     *result = ProcessCommand(event);
1236                 }
1237                 break;
1238         }
1239
1240         return TRUE;
1241     }
1242
1243     // not processed
1244     return FALSE;
1245 }
1246
1247 // ----------------------------------------------------------------------------
1248 // colour setting for the rich edit controls
1249 // ----------------------------------------------------------------------------
1250
1251 // Watcom C++ doesn't define this
1252 #ifndef SCF_ALL
1253 #define SCF_ALL 0x0004
1254 #endif
1255
1256 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1257 {
1258     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1259     {
1260         // colour didn't really change
1261         return FALSE;
1262     }
1263
1264     if ( IsRich() )
1265     {
1266         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1267         // EM_SETBKGNDCOLOR additionally
1268         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1269     }
1270
1271     return TRUE;
1272 }
1273
1274 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1275 {
1276     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1277     {
1278         // colour didn't really change
1279         return FALSE;
1280     }
1281
1282     if ( IsRich() )
1283     {
1284         // change the colour of everything
1285         CHARFORMAT cf;
1286         wxZeroMemory(cf);
1287         cf.cbSize = sizeof(cf);
1288         cf.dwMask = CFM_COLOR;
1289         cf.crTextColor = wxColourToRGB(colour);
1290         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1291     }
1292
1293     return TRUE;
1294 }
1295
1296 // ----------------------------------------------------------------------------
1297 // styling support for rich edit controls
1298 // ----------------------------------------------------------------------------
1299
1300 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1301 {
1302     if ( !IsRich() )
1303     {
1304         // can't do it with normal text control
1305         return FALSE;
1306     }
1307
1308     // the rich text control doesn't handle setting background colour, so don't
1309     // even try if it's the only thing we want to change
1310     if ( wxRichEditModule::GetLoadedVersion() < 2 &&
1311          !style.HasFont() && !style.HasTextColour() )
1312     {
1313         // nothing to do: return TRUE if there was really nothing to do and
1314         // FALSE if we failed to set bg colour
1315         return !style.HasBackgroundColour();
1316     }
1317
1318     // order the range if needed
1319     if ( start > end )
1320     {
1321         long tmp = start;
1322         start = end;
1323         end = tmp;
1324     }
1325
1326     // we can only change the format of the selection, so select the range we
1327     // want and restore the old selection later
1328     long startOld, endOld;
1329     GetSelection(&startOld, &endOld);
1330
1331     // but do we really have to change the selection?
1332     bool changeSel = start != startOld || end != endOld;
1333
1334     if ( changeSel )
1335         SendMessage(GetHwnd(), EM_SETSEL, (WPARAM) start, (LPARAM) end);
1336
1337     // initialize CHARFORMAT struct
1338 #if wxUSE_RICHEDIT2
1339     CHARFORMAT2 cf;
1340 #else
1341     CHARFORMAT cf;
1342 #endif
1343     wxZeroMemory(cf);
1344     cf.cbSize = sizeof(cf);
1345
1346     if ( style.HasFont() )
1347     {
1348         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1349                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1350
1351         // fill in data from LOGFONT but recalculate lfHeight because we need
1352         // the real height in twips and not the negative number which
1353         // wxFillLogFont() returns (this is correct in general and works with
1354         // the Windows font mapper, but not here)
1355         LOGFONT lf;
1356         wxFillLogFont(&lf, &style.GetFont());
1357         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1358         cf.bCharSet = lf.lfCharSet;
1359         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1360         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1361
1362         // also deal with underline/italic/bold attributes: note that we must
1363         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1364         // style to allow clearing it
1365         if ( lf.lfItalic )
1366         {
1367             cf.dwEffects |= CFE_ITALIC;
1368         }
1369
1370         if ( lf.lfWeight == FW_BOLD )
1371         {
1372             cf.dwEffects |= CFE_BOLD;
1373         }
1374
1375         if ( lf.lfUnderline )
1376         {
1377             cf.dwEffects |= CFE_UNDERLINE;
1378         }
1379
1380         // strikeout fonts are not supported by wxWindows
1381     }
1382
1383     if ( style.HasTextColour() )
1384     {
1385         cf.dwMask |= CFM_COLOR;
1386         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1387     }
1388
1389 #if wxUSE_RICHEDIT2
1390     if ( wxRichEditModule::GetLoadedVersion() > 1 && style.HasBackgroundColour() )
1391     {
1392         cf.dwMask |= CFM_BACKCOLOR;
1393         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1394     }
1395 #endif // wxUSE_RICHEDIT2
1396
1397     // do format the selection
1398     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1399                             SCF_SELECTION, (LPARAM)&cf) != 0;
1400     if ( !ok )
1401     {
1402         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1403     }
1404
1405     if ( changeSel )
1406     {
1407         // restore the original selection
1408         SendMessage(GetHwnd(), EM_SETSEL, (WPARAM)startOld, (LPARAM)endOld);
1409     }
1410
1411     return ok;
1412 }
1413
1414 // ----------------------------------------------------------------------------
1415 // wxRichEditModule
1416 // ----------------------------------------------------------------------------
1417
1418 bool wxRichEditModule::OnInit()
1419 {
1420     // don't do anything - we will load it when needed
1421     return TRUE;
1422 }
1423
1424 void wxRichEditModule::OnExit()
1425 {
1426     if ( ms_hRichEdit )
1427     {
1428         FreeLibrary(ms_hRichEdit);
1429     }
1430 }
1431
1432 /* static */
1433 bool wxRichEditModule::Load(int version)
1434 {
1435     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1436                  _T("incorrect richedit control version requested") );
1437
1438     if ( version <= ms_verRichEdit )
1439     {
1440         // we've already got this or better
1441         return TRUE;
1442     }
1443
1444     if ( ms_hRichEdit )
1445     {
1446         ::FreeLibrary(ms_hRichEdit);
1447     }
1448
1449     // always try load riched20.dll first - like this we won't have to reload
1450     // it later if we're first asked for RE 1 and then for RE 2 or 3
1451     wxString dllname = _T("riched20.dll");
1452     ms_hRichEdit = ::LoadLibrary(dllname);
1453     ms_verRichEdit = 2; // no way to tell if it's 2 or 3, assume 2
1454
1455     if ( !ms_hRichEdit && (version == 1) )
1456     {
1457         // fall back to RE 1
1458         dllname = _T("riched32.dll");
1459         ms_hRichEdit = ::LoadLibrary(dllname);
1460         ms_verRichEdit = 1;
1461     }
1462
1463     if ( !ms_hRichEdit )
1464     {
1465         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1466
1467         ms_verRichEdit = -1;
1468
1469         return FALSE;
1470     }
1471
1472     return TRUE;
1473 }
1474
1475 #endif // wxUSE_RICHEDIT
1476
1477 #endif // wxUSE_TEXTCTRL