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     if (wxOpenClipboard()) {
 694         wxSetClipboardData(wxDF_TEXT, (wxObject *) (const wxChar *)value, 0, 0);
 695         wxCloseClipboard();
 696
 697         // Paste into edit control
 698         SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 699     }
 700 #else
 701     wxFAIL_MSG("wxTextCtrl::Replace not implemented if wxUSE_CLIPBOARD is 0.");
 702 #endif
 703 }
 704
 705 void wxTextCtrl::Remove(long from, long to)
 706 {
 707     HWND hWnd = GetHwnd();
 708     long fromChar = from;
 709     long toChar = to;
 710
 711     // Cut all selected text
 712 #ifdef __WIN32__
 713     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 714 #else
 715     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 716 #endif
 717     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 718 }
 719
 720 void wxTextCtrl::SetSelection(long from, long to)
 721 {
 722     HWND hWnd = GetHwnd();
 723     long fromChar = from;
 724     long toChar = to;
 725
 726     // if from and to are both -1, it means (in wxWindows) that all text should
 727     // be selected. Translate into Windows convention
 728     if ((from == -1) && (to == -1))
 729     {
 730       fromChar = 0;
 731       toChar = -1;
 732     }
 733
 734 #ifdef __WIN32__
 735     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 736     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 737 #else
 738     // WPARAM is 0: selection is scrolled into view
 739     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 740 #endif
 741 }
 742
 743 bool wxTextCtrl::LoadFile(const wxString& file)
 744 {
 745     if ( wxTextCtrlBase::LoadFile(file) )
 746     {
 747         // update the size limit if needed
 748         AdjustSpaceLimit();
 749
 750         return TRUE;
 751     }
 752
 753     return FALSE;
 754 }
 755
 756 bool wxTextCtrl::IsModified() const
 757 {
 758     return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
 759 }
 760
 761 // Makes 'unmodified'
 762 void wxTextCtrl::DiscardEdits()
 763 {
 764     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 765 }
 766
 767 int wxTextCtrl::GetNumberOfLines() const
 768 {
 769     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 770 }
 771
 772 long wxTextCtrl::XYToPosition(long x, long y) const
 773 {
 774     HWND hWnd = GetHwnd();
 775
 776     // This gets the char index for the _beginning_ of this line
 777     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 778     return (long)(x + charIndex);
 779 }
 780
 781 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 782 {
 783     HWND hWnd = GetHwnd();
 784
 785     // This gets the line number containing the character
 786     int lineNo;
 787 #if wxUSE_RICHEDIT
 788     if ( m_isRich )
 789     {
 790         lineNo = (int)SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
 791     }
 792     else
 793 #endif // wxUSE_RICHEDIT
 794         lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
 795
 796     if ( lineNo == -1 )
 797     {
 798         // no such line
 799         return FALSE;
 800     }
 801
 802     // This gets the char index for the _beginning_ of this line
 803     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 804     if ( charIndex == -1 )
 805     {
 806         return FALSE;
 807     }
 808
 809     // The X position must therefore be the different between pos and charIndex
 810     if ( x )
 811         *x = (long)(pos - charIndex);
 812     if ( y )
 813         *y = (long)lineNo;
 814
 815     return TRUE;
 816 }
 817
 818 void wxTextCtrl::ShowPosition(long pos)
 819 {
 820     HWND hWnd = GetHwnd();
 821
 822     // To scroll to a position, we pass the number of lines and characters
 823     // to scroll *by*. This means that we need to:
 824     // (1) Find the line position of the current line.
 825     // (2) Find the line position of pos.
 826     // (3) Scroll by (pos - current).
 827     // For now, ignore the horizontal scrolling.
 828
 829     // Is this where scrolling is relative to - the line containing the caret?
 830     // Or is the first visible line??? Try first visible line.
 831 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 832
 833     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 834
 835     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 836
 837     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 838
 839     if (linesToScroll != 0)
 840       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 841 }
 842
 843 int wxTextCtrl::GetLineLength(long lineNo) const
 844 {
 845     long charIndex = XYToPosition(0, lineNo);
 846     int len = (int)SendMessage(GetHwnd(), EM_LINELENGTH, charIndex, 0);
 847     return len;
 848 }
 849
 850 wxString wxTextCtrl::GetLineText(long lineNo) const
 851 {
 852     size_t len = (size_t)GetLineLength(lineNo) + 1;
 853
 854     // there must be at least enough place for the length WORD in the
 855     // buffer
 856     len += sizeof(WORD);
 857
 858     wxString str;
 859     wxChar *buf = str.GetWriteBuf(len);
 860
 861     *(WORD *)buf = (WORD)len;
 862     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
 863     buf[len] = 0;
 864
 865     str.UngetWriteBuf(len);
 866
 867     return str;
 868 }
 869
 870 // ----------------------------------------------------------------------------
 871 // Undo/redo
 872 // ----------------------------------------------------------------------------
 873
 874 void wxTextCtrl::Undo()
 875 {
 876     if (CanUndo())
 877     {
 878         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 879     }
 880 }
 881
 882 void wxTextCtrl::Redo()
 883 {
 884     if (CanRedo())
 885     {
 886         // Same as Undo, since Undo undoes the undo, i.e. a redo.
 887         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 888     }
 889 }
 890
 891 bool wxTextCtrl::CanUndo() const
 892 {
 893     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 894 }
 895
 896 bool wxTextCtrl::CanRedo() const
 897 {
 898     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 899 }
 900
 901 // ----------------------------------------------------------------------------
 902 // implemenation details
 903 // ----------------------------------------------------------------------------
 904
 905 void wxTextCtrl::Command(wxCommandEvent & event)
 906 {
 907     SetValue(event.GetString());
 908     ProcessCommand (event);
 909 }
 910
 911 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 912 {
 913     // By default, load the first file into the text window.
 914     if (event.GetNumberOfFiles() > 0)
 915     {
 916         LoadFile(event.GetFiles()[0]);
 917     }
 918 }
 919
 920 void wxTextCtrl::OnChar(wxKeyEvent& event)
 921 {
 922     switch ( event.KeyCode() )
 923     {
 924         case WXK_RETURN:
 925             if ( !(m_windowStyle & wxTE_MULTILINE) )
 926             {
 927                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 928                 InitCommandEvent(event);
 929                 event.SetString(GetValue());
 930                 if ( GetEventHandler()->ProcessEvent(event) )
 931                     return;
 932             }
 933             //else: multiline controls need Enter for themselves
 934
 935             break;
 936
 937         case WXK_TAB:
 938             // always produce navigation event - even if we process TAB
 939             // ourselves the fact that we got here means that the user code
 940             // decided to skip processing of this TAB - probably to let it
 941             // do its default job.
 942             {
 943                 wxNavigationKeyEvent eventNav;
 944                 eventNav.SetDirection(!event.ShiftDown());
 945                 eventNav.SetWindowChange(event.ControlDown());
 946                 eventNav.SetEventObject(this);
 947
 948                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
 949                     return;
 950             }
 951             break;
 952     }
 953
 954     // no, we didn't process it
 955     event.Skip();
 956 }
 957
 958 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 959 {
 960     switch (param)
 961     {
 962         case EN_SETFOCUS:
 963         case EN_KILLFOCUS:
 964             {
 965                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
 966                         : wxEVT_SET_FOCUS,
 967                         m_windowId);
 968                 event.SetEventObject( this );
 969                 GetEventHandler()->ProcessEvent(event);
 970             }
 971             break;
 972
 973         case EN_CHANGE:
 974             {
 975                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
 976                 InitCommandEvent(event);
 977                 event.SetString(GetValue());
 978                 ProcessCommand(event);
 979             }
 980             break;
 981
 982         case EN_MAXTEXT:
 983             // the text size limit has been hit - increase it
 984             AdjustSpaceLimit();
 985             break;
 986
 987             // the other notification messages are not processed
 988         case EN_UPDATE:
 989         case EN_ERRSPACE:
 990         case EN_HSCROLL:
 991         case EN_VSCROLL:
 992             return FALSE;
 993         default:
 994             return FALSE;
 995     }
 996
 997     // processed
 998     return TRUE;
 999 }
1000
1001 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1002 #if wxUSE_CTL3D
1003                                WXUINT message,
1004                                WXWPARAM wParam,
1005                                WXLPARAM lParam
1006 #else
1007                                WXUINT WXUNUSED(message),
1008                                WXWPARAM WXUNUSED(wParam),
1009                                WXLPARAM WXUNUSED(lParam)
1010 #endif
1011     )
1012 {
1013 #if wxUSE_CTL3D
1014     if ( m_useCtl3D )
1015     {
1016         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1017         return (WXHBRUSH) hbrush;
1018     }
1019 #endif // wxUSE_CTL3D
1020
1021     HDC hdc = (HDC)pDC;
1022     if (GetParent()->GetTransparentBackground())
1023         SetBkMode(hdc, TRANSPARENT);
1024     else
1025         SetBkMode(hdc, OPAQUE);
1026
1027     wxColour colBack = GetBackgroundColour();
1028
1029     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1030         colBack = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
1031
1032     ::SetBkColor(hdc, wxColourToRGB(colBack));
1033     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1034
1035     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1036
1037     return (WXHBRUSH)brush->GetResourceHandle();
1038 }
1039
1040 // In WIN16, need to override normal erasing because
1041 // Ctl3D doesn't use the wxWindows background colour.
1042 #ifdef __WIN16__
1043 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1044 {
1045     wxColour col(m_backgroundColour);
1046
1047 #if wxUSE_CTL3D
1048     if (m_useCtl3D)
1049         col = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
1050 #endif
1051
1052     RECT rect;
1053     ::GetClientRect(GetHwnd(), &rect);
1054
1055     COLORREF ref = PALETTERGB(col.Red(),
1056                               col.Green(),
1057                               col.Blue());
1058     HBRUSH hBrush = ::CreateSolidBrush(ref);
1059     if ( !hBrush )
1060         wxLogLastError(wxT("CreateSolidBrush"));
1061
1062     HDC hdc = (HDC)event.GetDC()->GetHDC();
1063
1064     int mode = ::SetMapMode(hdc, MM_TEXT);
1065
1066     ::FillRect(hdc, &rect, hBrush);
1067     ::DeleteObject(hBrush);
1068     ::SetMapMode(hdc, mode);
1069
1070 }
1071 #endif
1072
1073 void wxTextCtrl::AdjustSpaceLimit()
1074 {
1075 #ifndef __WIN16__
1076     unsigned int len = ::GetWindowTextLength(GetHwnd()),
1077     limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1078     if ( len >= limit )
1079     {
1080         limit = len + 0x8000;    // 32Kb
1081
1082 #if wxUSE_RICHEDIT
1083         if ( m_isRich )
1084         {
1085             // as a nice side effect, this also allows passing limit > 64Kb
1086             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1087         }
1088         else
1089 #endif // wxUSE_RICHEDIT
1090         {
1091             if ( limit > 0xffff )
1092             {
1093                 // this will set it to a platform-dependent maximum (much more
1094                 // than 64Kb under NT)
1095                 limit = 0;
1096             }
1097
1098             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1099         }
1100     }
1101 #endif // !Win16
1102 }
1103
1104 bool wxTextCtrl::AcceptsFocus() const
1105 {
1106     // we don't want focus if we can't be edited
1107     return IsEditable() && wxControl::AcceptsFocus();
1108 }
1109
1110 wxSize wxTextCtrl::DoGetBestSize() const
1111 {
1112     int cx, cy;
1113     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1114
1115     int wText = DEFAULT_ITEM_WIDTH;
1116
1117     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1118     if ( m_windowStyle & wxTE_MULTILINE )
1119     {
1120         hText *= wxMax(GetNumberOfLines(), 5);
1121     }
1122     //else: for single line control everything is ok
1123
1124     return wxSize(wText, hText);
1125 }
1126
1127 // ----------------------------------------------------------------------------
1128 // standard handlers for standard edit menu events
1129 // ----------------------------------------------------------------------------
1130
1131 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1132 {
1133     Cut();
1134 }
1135
1136 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1137 {
1138     Copy();
1139 }
1140
1141 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1142 {
1143     Paste();
1144 }
1145
1146 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1147 {
1148     Undo();
1149 }
1150
1151 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1152 {
1153     Redo();
1154 }
1155
1156 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1157 {
1158     event.Enable( CanCut() );
1159 }
1160
1161 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1162 {
1163     event.Enable( CanCopy() );
1164 }
1165
1166 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1167 {
1168     event.Enable( CanPaste() );
1169 }
1170
1171 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1172 {
1173     event.Enable( CanUndo() );
1174 }
1175
1176 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1177 {
1178     event.Enable( CanRedo() );
1179 }
1180
1181 // the rest of the file only deals with the rich edit controls
1182 #if wxUSE_RICHEDIT
1183
1184 // ----------------------------------------------------------------------------
1185 // EN_LINK processing
1186 // ----------------------------------------------------------------------------
1187
1188 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1189 {
1190     NMHDR *hdr = (NMHDR* )lParam;
1191     if ( hdr->code == EN_LINK )
1192     {
1193         ENLINK *enlink = (ENLINK *)hdr;
1194
1195         switch ( enlink->msg )
1196         {
1197             case WM_SETCURSOR:
1198                 // ok, so it is hardcoded - do we really nee to customize it?
1199                 ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1200                 *result = TRUE;
1201                 break;
1202
1203             case WM_MOUSEMOVE:
1204             case WM_LBUTTONDOWN:
1205             case WM_LBUTTONUP:
1206             case WM_LBUTTONDBLCLK:
1207             case WM_RBUTTONDOWN:
1208             case WM_RBUTTONUP:
1209             case WM_RBUTTONDBLCLK:
1210                 // send a mouse event
1211                 {
1212                     static const wxEventType eventsMouse[] =
1213                     {
1214                         wxEVT_MOTION,
1215                         wxEVT_LEFT_DOWN,
1216                         wxEVT_LEFT_UP,
1217                         wxEVT_LEFT_DCLICK,
1218                         wxEVT_RIGHT_DOWN,
1219                         wxEVT_RIGHT_UP,
1220                         wxEVT_RIGHT_DCLICK,
1221                     };
1222
1223                     // the event ids are consecutive
1224                     wxMouseEvent
1225                         evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1226
1227                     InitMouseEvent(evtMouse,
1228                                    GET_X_LPARAM(enlink->lParam),
1229                                    GET_Y_LPARAM(enlink->lParam),
1230                                    enlink->wParam);
1231
1232                     wxTextUrlEvent event(m_windowId, evtMouse,
1233                                          enlink->chrg.cpMin,
1234                                          enlink->chrg.cpMax);
1235
1236                     InitCommandEvent(event);
1237
1238                     *result = ProcessCommand(event);
1239                 }
1240                 break;
1241         }
1242
1243         return TRUE;
1244     }
1245
1246     // not processed
1247     return FALSE;
1248 }
1249
1250 // ----------------------------------------------------------------------------
1251 // colour setting for the rich edit controls
1252 // ----------------------------------------------------------------------------
1253
1254 // Watcom C++ doesn't define this
1255 #ifndef SCF_ALL
1256 #define SCF_ALL 0x0004
1257 #endif
1258
1259 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1260 {
1261     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1262     {
1263         // colour didn't really change
1264         return FALSE;
1265     }
1266
1267     if ( IsRich() )
1268     {
1269         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1270         // EM_SETBKGNDCOLOR additionally
1271         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1272     }
1273
1274     return TRUE;
1275 }
1276
1277 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1278 {
1279     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1280     {
1281         // colour didn't really change
1282         return FALSE;
1283     }
1284
1285     if ( IsRich() )
1286     {
1287         // change the colour of everything
1288         CHARFORMAT cf;
1289         wxZeroMemory(cf);
1290         cf.cbSize = sizeof(cf);
1291         cf.dwMask = CFM_COLOR;
1292         cf.crTextColor = wxColourToRGB(colour);
1293         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1294     }
1295
1296     return TRUE;
1297 }
1298
1299 // ----------------------------------------------------------------------------
1300 // styling support for rich edit controls
1301 // ----------------------------------------------------------------------------
1302
1303 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1304 {
1305     if ( !IsRich() )
1306     {
1307         // can't do it with normal text control
1308         return FALSE;
1309     }
1310
1311     // the rich text control doesn't handle setting background colour, so don't
1312     // even try if it's the only thing we want to change
1313     if ( wxRichEditModule::GetLoadedVersion() < 2 &&
1314          !style.HasFont() && !style.HasTextColour() )
1315     {
1316         // nothing to do: return TRUE if there was really nothing to do and
1317         // FALSE if we failed to set bg colour
1318         return !style.HasBackgroundColour();
1319     }
1320
1321     // order the range if needed
1322     if ( start > end )
1323     {
1324         long tmp = start;
1325         start = end;
1326         end = tmp;
1327     }
1328
1329     // we can only change the format of the selection, so select the range we
1330     // want and restore the old selection later
1331     long startOld, endOld;
1332     GetSelection(&startOld, &endOld);
1333
1334     // but do we really have to change the selection?
1335     bool changeSel = start != startOld || end != endOld;
1336
1337     if ( changeSel )
1338         SendMessage(GetHwnd(), EM_SETSEL, (WPARAM) start, (LPARAM) end);
1339
1340     // initialize CHARFORMAT struct
1341 #if wxUSE_RICHEDIT2
1342     CHARFORMAT2 cf;
1343 #else
1344     CHARFORMAT cf;
1345 #endif
1346     wxZeroMemory(cf);
1347     cf.cbSize = sizeof(cf);
1348
1349     if ( style.HasFont() )
1350     {
1351         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1352                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1353
1354         // fill in data from LOGFONT but recalculate lfHeight because we need
1355         // the real height in twips and not the negative number which
1356         // wxFillLogFont() returns (this is correct in general and works with
1357         // the Windows font mapper, but not here)
1358         LOGFONT lf;
1359         wxFillLogFont(&lf, &style.GetFont());
1360         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1361         cf.bCharSet = lf.lfCharSet;
1362         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1363         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1364
1365         // also deal with underline/italic/bold attributes: note that we must
1366         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1367         // style to allow clearing it
1368         if ( lf.lfItalic )
1369         {
1370             cf.dwEffects |= CFE_ITALIC;
1371         }
1372
1373         if ( lf.lfWeight == FW_BOLD )
1374         {
1375             cf.dwEffects |= CFE_BOLD;
1376         }
1377
1378         if ( lf.lfUnderline )
1379         {
1380             cf.dwEffects |= CFE_UNDERLINE;
1381         }
1382
1383         // strikeout fonts are not supported by wxWindows
1384     }
1385
1386     if ( style.HasTextColour() )
1387     {
1388         cf.dwMask |= CFM_COLOR;
1389         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1390     }
1391
1392 #if wxUSE_RICHEDIT2
1393     if ( wxRichEditModule::GetLoadedVersion() > 1 && style.HasBackgroundColour() )
1394     {
1395         cf.dwMask |= CFM_BACKCOLOR;
1396         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1397     }
1398 #endif // wxUSE_RICHEDIT2
1399
1400     // do format the selection
1401     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1402                             SCF_SELECTION, (LPARAM)&cf) != 0;
1403     if ( !ok )
1404     {
1405         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1406     }
1407
1408     if ( changeSel )
1409     {
1410         // restore the original selection
1411         SendMessage(GetHwnd(), EM_SETSEL, (WPARAM)startOld, (LPARAM)endOld);
1412     }
1413
1414     return ok;
1415 }
1416
1417 // ----------------------------------------------------------------------------
1418 // wxRichEditModule
1419 // ----------------------------------------------------------------------------
1420
1421 bool wxRichEditModule::OnInit()
1422 {
1423     // don't do anything - we will load it when needed
1424     return TRUE;
1425 }
1426
1427 void wxRichEditModule::OnExit()
1428 {
1429     if ( ms_hRichEdit )
1430     {
1431         FreeLibrary(ms_hRichEdit);
1432     }
1433 }
1434
1435 /* static */
1436 bool wxRichEditModule::Load(int version)
1437 {
1438     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1439                  _T("incorrect richedit control version requested") );
1440
1441     if ( version <= ms_verRichEdit )
1442     {
1443         // we've already got this or better
1444         return TRUE;
1445     }
1446
1447     if ( ms_hRichEdit )
1448     {
1449         ::FreeLibrary(ms_hRichEdit);
1450     }
1451
1452     // always try load riched20.dll first - like this we won't have to reload
1453     // it later if we're first asked for RE 1 and then for RE 2 or 3
1454     wxString dllname = _T("riched20.dll");
1455     ms_hRichEdit = ::LoadLibrary(dllname);
1456     ms_verRichEdit = 2; // no way to tell if it's 2 or 3, assume 2
1457
1458     if ( !ms_hRichEdit && (version == 1) )
1459     {
1460         // fall back to RE 1
1461         dllname = _T("riched32.dll");
1462         ms_hRichEdit = ::LoadLibrary(dllname);
1463         ms_verRichEdit = 1;
1464     }
1465
1466     if ( !ms_hRichEdit )
1467     {
1468         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1469
1470         ms_verRichEdit = -1;
1471
1472         return FALSE;
1473     }
1474
1475     return TRUE;
1476 }
1477
1478 #endif // wxUSE_RICHEDIT
1479
1480 #endif // wxUSE_TEXTCTRL