src/msw/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/textctrl.cpp
   3 // Purpose:     wxTextCtrl
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 #ifdef __GNUG__
  17     #pragma implementation "textctrl.h"
  18 #endif
  19
  20 // ----------------------------------------------------------------------------
  21 // headers
  22 // ----------------------------------------------------------------------------
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #if wxUSE_TEXTCTRL
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/textctrl.h"
  35     #include "wx/settings.h"
  36     #include "wx/brush.h"
  37     #include "wx/utils.h"
  38     #include "wx/intl.h"
  39     #include "wx/log.h"
  40     #include "wx/app.h"
  41 #endif
  42
  43 #include "wx/module.h"
  44
  45 #if wxUSE_CLIPBOARD
  46     #include "wx/clipbrd.h"
  47 #endif
  48
  49 #include "wx/textfile.h"
  50
  51 #include <windowsx.h>
  52
  53 #include "wx/msw/private.h"
  54
  55 #include <string.h>
  56 #include <stdlib.h>
  57 #include <sys/types.h>
  58
  59 #if wxUSE_RICHEDIT && (!defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__))
  60     #include <richedit.h>
  61 #endif
  62
  63 // old mingw32 doesn't define this
  64 #ifndef CFM_CHARSET
  65     #define CFM_CHARSET 0x08000000
  66 #endif // CFM_CHARSET
  67
  68 #ifndef CFM_BACKCOLOR
  69     #define CFM_BACKCOLOR 0x04000000
  70 #endif
  71
  72 // cygwin does not have these defined for richedit
  73 #ifndef ENM_LINK
  74     #define ENM_LINK 0x04000000
  75 #endif
  76
  77 #ifndef EM_AUTOURLDETECT
  78     #define EM_AUTOURLDETECT (WM_USER + 91)
  79 #endif
  80
  81 #ifndef EN_LINK
  82     #define EN_LINK 0x070b
  83
  84     typedef struct _enlink
  85     {
  86         NMHDR nmhdr;
  87         UINT msg;
  88         WPARAM wParam;
  89         LPARAM lParam;
  90         CHARRANGE chrg;
  91     } ENLINK;
  92 #endif // ENLINK
  93
  94 // ----------------------------------------------------------------------------
  95 // private classes
  96 // ----------------------------------------------------------------------------
  97
  98 #if wxUSE_RICHEDIT
  99
 100 // this module initializes RichEdit DLL if needed
 101 class wxRichEditModule : public wxModule
 102 {
 103 public:
 104     virtual bool OnInit();
 105     virtual void OnExit();
 106
 107     // get the version currently loaded, -1 if none
 108     static int GetLoadedVersion() { return ms_verRichEdit; }
 109
 110     // load the richedit DLL of at least of required version
 111     static bool Load(int version = 1);
 112
 113 private:
 114     // the handle to richedit DLL and the version of the DLL loaded
 115     static HINSTANCE ms_hRichEdit;
 116
 117     // the DLL version loaded or -1 if none
 118     static int ms_verRichEdit;
 119
 120     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
 121 };
 122
 123 HINSTANCE wxRichEditModule::ms_hRichEdit = (HINSTANCE)NULL;
 124 int       wxRichEditModule::ms_verRichEdit = -1;
 125
 126 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 127
 128 #endif // wxUSE_RICHEDIT
 129
 130 // ----------------------------------------------------------------------------
 131 // event tables and other macros
 132 // ----------------------------------------------------------------------------
 133
 134 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 135
 136 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 137     EVT_CHAR(wxTextCtrl::OnChar)
 138     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 139
 140     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 141     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 142     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 143     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 144     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 145
 146     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 147     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 148     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 149     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 150     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 151 #ifdef __WIN16__
 152     EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
 153 #endif
 154 END_EVENT_TABLE()
 155
 156 // ============================================================================
 157 // implementation
 158 // ============================================================================
 159
 160 // ----------------------------------------------------------------------------
 161 // creation
 162 // ----------------------------------------------------------------------------
 163
 164 wxTextCtrl::wxTextCtrl()
 165 {
 166 #if wxUSE_RICHEDIT
 167     m_isRich = FALSE;
 168 #endif
 169 }
 170
 171 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 172                         const wxString& value,
 173                         const wxPoint& pos,
 174                         const wxSize& size,
 175                         long style,
 176                         const wxValidator& validator,
 177                         const wxString& name)
 178 {
 179     // base initialization
 180     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 181         return FALSE;
 182
 183     if ( parent )
 184         parent->AddChild(this);
 185
 186     // translate wxWin style flags to MSW ones, checking for consistency while
 187     // doing it
 188     long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 189
 190     if ( m_windowStyle & wxCLIP_SIBLINGS )
 191         msStyle |= WS_CLIPSIBLINGS;
 192
 193     if ( m_windowStyle & wxTE_MULTILINE )
 194     {
 195         wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
 196                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 197
 198         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 199         if ((m_windowStyle & wxTE_NO_VSCROLL) == 0)
 200             msStyle |= WS_VSCROLL;
 201         m_windowStyle |= wxTE_PROCESS_ENTER;
 202     }
 203     else
 204         msStyle |= ES_AUTOHSCROLL;
 205
 206     if (m_windowStyle & wxHSCROLL)
 207         msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL);
 208
 209     if (m_windowStyle & wxTE_READONLY)
 210         msStyle |= ES_READONLY;
 211
 212     if (m_windowStyle & wxTE_PASSWORD) // hidden input
 213         msStyle |= ES_PASSWORD;
 214
 215    if (m_windowStyle & wxTE_AUTO_SCROLL)
 216         msStyle |=  ES_AUTOHSCROLL;
 217
 218
 219     // we always want the characters and the arrows
 220     m_lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
 221
 222     // we may have several different cases:
 223     // 1. normal case: both TAB and ENTER are used for dialog navigation
 224     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
 225     //    control in the dialog
 226     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
 227     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
 228     //    the next control
 229     if ( m_windowStyle & wxTE_PROCESS_ENTER )
 230         m_lDlgCode |= DLGC_WANTMESSAGE;
 231     if ( m_windowStyle & wxTE_PROCESS_TAB )
 232         m_lDlgCode |= DLGC_WANTTAB;
 233
 234     // do create the control - either an EDIT or RICHEDIT
 235     wxString windowClass = wxT("EDIT");
 236
 237 #if wxUSE_RICHEDIT
 238     if ( m_windowStyle & wxTE_RICH )
 239     {
 240         static bool s_errorGiven = FALSE;   // MT-FIXME
 241
 242         // only give the error msg once if the DLL can't be loaded
 243         if ( !s_errorGiven )
 244         {
 245             // first try to load the RichEdit DLL (will do nothing if already
 246             // done)
 247             if ( !wxRichEditModule::Load() )
 248             {
 249                 wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 250
 251                 s_errorGiven = TRUE;
 252             }
 253         }
 254
 255         if ( s_errorGiven )
 256         {
 257             m_isRich = FALSE;
 258         }
 259         else
 260         {
 261             msStyle |= ES_AUTOVSCROLL;
 262             m_isRich = TRUE;
 263
 264             int ver = wxRichEditModule::GetLoadedVersion();
 265             if ( ver == 1 )
 266             {
 267                 windowClass = wxT("RICHEDIT");
 268             }
 269             else
 270             {
 271 #ifndef RICHEDIT_CLASS
 272                 wxString RICHEDIT_CLASS;
 273                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), ver);
 274 #if wxUSE_UNICODE
 275                 RICHEDIT_CLASS += _T('W');
 276 #else // ANSI
 277                 RICHEDIT_CLASS += _T('A');
 278 #endif // Unicode/ANSI
 279 #endif // !RICHEDIT_CLASS
 280
 281                 windowClass = RICHEDIT_CLASS;
 282             }
 283         }
 284     }
 285     else
 286         m_isRich = FALSE;
 287 #endif // wxUSE_RICHEDIT
 288
 289     bool want3D;
 290     WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
 291
 292     // Even with extended styles, need to combine with WS_BORDER for them to
 293     // look right.
 294     if ( want3D || wxStyleHasBorder(m_windowStyle) )
 295         msStyle |= WS_BORDER;
 296
 297     // NB: don't use pos and size as CreateWindowEx arguments because they
 298     //     might be -1 in which case we should use the default values (and
 299     //     SetSize called below takes care of it)
 300     m_hWnd = (WXHWND)::CreateWindowEx(exStyle,
 301                                       windowClass.c_str(),
 302                                       NULL,
 303                                       msStyle,
 304                                       0, 0, 0, 0,
 305                                       GetHwndOf(parent),
 306                                       (HMENU)m_windowId,
 307                                       wxGetInstance(),
 308                                       NULL);
 309
 310     wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create text ctrl") );
 311
 312 #if wxUSE_CTL3D
 313     if ( want3D )
 314     {
 315         Ctl3dSubclassCtl(GetHwnd());
 316         m_useCtl3D = TRUE;
 317     }
 318 #endif
 319
 320 #if wxUSE_RICHEDIT
 321     if (m_isRich)
 322     {
 323         // have to enable events manually
 324         LPARAM mask = ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE;
 325
 326         if ( m_windowStyle & wxTE_AUTO_URL )
 327         {
 328             mask |= ENM_LINK;
 329
 330             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 331         }
 332
 333         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 334     }
 335 #endif // wxUSE_RICHEDIT
 336
 337     SubclassWin(GetHWND());
 338
 339     // set font, position, size and initial value
 340     wxFont& fontParent = parent->GetFont();
 341     if ( fontParent.Ok() )
 342     {
 343         SetFont(fontParent);
 344     }
 345     else
 346     {
 347         SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 348     }
 349
 350     // Causes a crash for Symantec C++ and WIN32 for some reason
 351 #if !(defined(__SC__) && defined(__WIN32__))
 352     if ( !value.IsEmpty() )
 353     {
 354         SetValue(value);
 355     }
 356 #endif
 357
 358     // set colours
 359     SetupColours();
 360
 361     SetSize(pos.x, pos.y, size.x, size.y);
 362
 363     return TRUE;
 364 }
 365
 366 // Make sure the window style (etc.) reflects the HWND style (roughly)
 367 void wxTextCtrl::AdoptAttributesFromHWND()
 368 {
 369   wxWindow::AdoptAttributesFromHWND();
 370
 371   HWND hWnd = GetHwnd();
 372   long style = GetWindowLong(hWnd, GWL_STYLE);
 373
 374   // retrieve the style to see whether this is an edit or richedit ctrl
 375 #if wxUSE_RICHEDIT
 376   wxChar buf[256];
 377
 378   GetClassName(hWnd, buf, WXSIZEOF(buf));
 379
 380   if ( wxStricmp(buf, wxT("EDIT")) == 0 )
 381     m_isRich = FALSE;
 382   else
 383     m_isRich = TRUE;
 384 #endif // wxUSE_RICHEDIT
 385
 386   if (style & ES_MULTILINE)
 387     m_windowStyle |= wxTE_MULTILINE;
 388   if (style & ES_PASSWORD)
 389     m_windowStyle |= wxTE_PASSWORD;
 390   if (style & ES_READONLY)
 391     m_windowStyle |= wxTE_READONLY;
 392   if (style & ES_WANTRETURN)
 393     m_windowStyle |= wxTE_PROCESS_ENTER;
 394 }
 395
 396 void wxTextCtrl::SetupColours()
 397 {
 398     wxColour bkgndColour;
 399 //    if (IsEditable() || (m_windowStyle & wxTE_MULTILINE))
 400         bkgndColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
 401 //    else
 402 //        bkgndColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
 403
 404     SetBackgroundColour(bkgndColour);
 405     SetForegroundColour(GetParent()->GetForegroundColour());
 406 }
 407
 408 // ----------------------------------------------------------------------------
 409 // set/get the controls text
 410 // ----------------------------------------------------------------------------
 411
 412 wxString wxTextCtrl::GetValue() const
 413 {
 414     // we can't use wxGetWindowText() (i.e. WM_GETTEXT internally) for
 415     // retrieving more than 64Kb under Win9x
 416 #if wxUSE_RICHEDIT
 417     if ( m_isRich )
 418     {
 419         wxString str;
 420
 421         int len = GetWindowTextLength(GetHwnd());
 422         if ( len )
 423         {
 424             // alloc one extra WORD as needed by the control
 425             wxChar *p = str.GetWriteBuf(++len);
 426
 427             TEXTRANGE textRange;
 428             textRange.chrg.cpMin = 0;
 429             textRange.chrg.cpMax = -1;
 430             textRange.lpstrText = p;
 431
 432             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 433
 434             // believe it or not, but EM_GETTEXTRANGE uses just CR ('\r') for
 435             // the newlines which is neither Unix nor Windows style (Win95 with
 436             // riched20.dll shows this behaviour) - convert it to something
 437             // reasonable
 438             for ( ; *p; p++ )
 439             {
 440                 if ( *p == _T('\r') )
 441                     *p = _T('\n');
 442             }
 443
 444             str.UngetWriteBuf();
 445         }
 446         //else: no text at all, leave the string empty
 447
 448         return str;
 449     }
 450 #endif // wxUSE_RICHEDIT
 451
 452     // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 453     // same one as above for consitency
 454     wxString str = wxGetWindowText(GetHWND());
 455
 456     return wxTextFile::Translate(str, wxTextFileType_Unix);
 457 }
 458
 459 void wxTextCtrl::SetValue(const wxString& value)
 460 {
 461     // if the text is long enough, it's faster to just set it instead of first
 462     // comparing it with the old one (chances are that it will be different
 463     // anyhow, this comparison is there to avoid flicker for small single-line
 464     // edit controls mostly)
 465     if ( (value.length() > 0x400) || (value != GetValue()) )
 466     {
 467         wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 468
 469         SetWindowText(GetHwnd(), valueDos.c_str());
 470
 471         // for compatibility with the GTK and because it is more logical, we
 472         // move the cursor to the end of the text after SetValue()
 473
 474         // GRG, Jun/2000: Changed this back after a lot of discussion
 475         //   in the lists. wxWindows 2.2 will have a set of flags to
 476         //   customize this behaviour.
 477         //SetInsertionPointEnd();
 478
 479         AdjustSpaceLimit();
 480     }
 481 }
 482
 483 void wxTextCtrl::WriteText(const wxString& value)
 484 {
 485     wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 486
 487 #if wxUSE_RICHEDIT
 488     // ensure that the new text will be in the default style
 489     if ( IsRich() &&
 490             (m_defaultStyle.HasFont() || m_defaultStyle.HasTextColour()) )
 491     {
 492         long start, end;
 493         GetSelection(&start, &end);
 494         SetStyle(start, end, m_defaultStyle );
 495     }
 496 #endif // wxUSE_RICHEDIT
 497
 498     SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
 499
 500     AdjustSpaceLimit();
 501 }
 502
 503 void wxTextCtrl::AppendText(const wxString& text)
 504 {
 505     SetInsertionPointEnd();
 506     WriteText(text);
 507 }
 508
 509 void wxTextCtrl::Clear()
 510 {
 511     SetWindowText(GetHwnd(), wxT(""));
 512 }
 513
 514 // ----------------------------------------------------------------------------
 515 // Clipboard operations
 516 // ----------------------------------------------------------------------------
 517
 518 void wxTextCtrl::Copy()
 519 {
 520     if (CanCopy())
 521     {
 522         HWND hWnd = GetHwnd();
 523         SendMessage(hWnd, WM_COPY, 0, 0L);
 524     }
 525 }
 526
 527 void wxTextCtrl::Cut()
 528 {
 529     if (CanCut())
 530     {
 531         HWND hWnd = GetHwnd();
 532         SendMessage(hWnd, WM_CUT, 0, 0L);
 533     }
 534 }
 535
 536 void wxTextCtrl::Paste()
 537 {
 538     if (CanPaste())
 539     {
 540         HWND hWnd = GetHwnd();
 541         SendMessage(hWnd, WM_PASTE, 0, 0L);
 542     }
 543 }
 544
 545 bool wxTextCtrl::CanCopy() const
 546 {
 547     // Can copy if there's a selection
 548     long from, to;
 549     GetSelection(& from, & to);
 550     return (from != to) ;
 551 }
 552
 553 bool wxTextCtrl::CanCut() const
 554 {
 555     // Can cut if there's a selection
 556     long from, to;
 557     GetSelection(& from, & to);
 558     return (from != to) && (IsEditable());
 559 }
 560
 561 bool wxTextCtrl::CanPaste() const
 562 {
 563 #if wxUSE_RICHEDIT
 564     if (m_isRich)
 565     {
 566         int dataFormat = 0; // 0 == any format
 567         return (::SendMessage( GetHwnd(), EM_CANPASTE, (WPARAM) (UINT) dataFormat, 0) != 0);
 568     }
 569 #endif
 570     if (!IsEditable())
 571         return FALSE;
 572
 573     // Standard edit control: check for straight text on clipboard
 574     bool isTextAvailable = FALSE;
 575     if ( ::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 576     {
 577         isTextAvailable = (::IsClipboardFormatAvailable(CF_TEXT) != 0);
 578         ::CloseClipboard();
 579     }
 580
 581     return isTextAvailable;
 582 }
 583
 584 // ----------------------------------------------------------------------------
 585 // Accessors
 586 // ----------------------------------------------------------------------------
 587
 588 void wxTextCtrl::SetEditable(bool editable)
 589 {
 590     HWND hWnd = GetHwnd();
 591     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 592 }
 593
 594 void wxTextCtrl::SetInsertionPoint(long pos)
 595 {
 596     HWND hWnd = GetHwnd();
 597 #ifdef __WIN32__
 598 #if wxUSE_RICHEDIT
 599     if ( m_isRich)
 600     {
 601         CHARRANGE range;
 602         range.cpMin = pos;
 603         range.cpMax = pos;
 604         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 605         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 606     }
 607     else
 608 #endif // wxUSE_RICHEDIT
 609     {
 610         SendMessage(hWnd, EM_SETSEL, pos, pos);
 611         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 612     }
 613 #else // Win16
 614     SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 615 #endif // Win32/16
 616
 617     static const wxChar *nothing = _T("");
 618     SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 619 }
 620
 621 void wxTextCtrl::SetInsertionPointEnd()
 622 {
 623     long pos = GetLastPosition();
 624     SetInsertionPoint(pos);
 625 }
 626
 627 long wxTextCtrl::GetInsertionPoint() const
 628 {
 629 #if wxUSE_RICHEDIT
 630     if (m_isRich)
 631     {
 632         CHARRANGE range;
 633         range.cpMin = 0;
 634         range.cpMax = 0;
 635         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 636         return range.cpMin;
 637     }
 638 #endif
 639
 640     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 641     return Pos & 0xFFFF;
 642 }
 643
 644 long wxTextCtrl::GetLastPosition() const
 645 {
 646     HWND hWnd = GetHwnd();
 647
 648     // Will always return a number > 0 (according to docs)
 649     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 650
 651     // This gets the char index for the _beginning_ of the last line
 652     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 653
 654     // Get number of characters in the last line. We'll add this to the character
 655     // index for the last line, 1st position.
 656     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 657
 658     return (long)(charIndex + lineLength);
 659 }
 660
 661 // If the return values from and to are the same, there is no
 662 // selection.
 663 void wxTextCtrl::GetSelection(long* from, long* to) const
 664 {
 665 #if wxUSE_RICHEDIT
 666     if (m_isRich)
 667     {
 668         CHARRANGE charRange;
 669         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) (CHARRANGE*) & charRange);
 670
 671         *from = charRange.cpMin;
 672         *to = charRange.cpMax;
 673     }
 674     else
 675 #endif // rich/!rich
 676     {
 677         DWORD dwStart, dwEnd;
 678         WPARAM wParam = (WPARAM) &dwStart; // receives starting position
 679         LPARAM lParam = (LPARAM) &dwEnd;   // receives ending position
 680
 681         ::SendMessage(GetHwnd(), EM_GETSEL, wParam, lParam);
 682
 683         *from = dwStart;
 684         *to = dwEnd;
 685     }
 686 }
 687
 688 bool wxTextCtrl::IsEditable() const
 689 {
 690     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 691
 692     return ((style & ES_READONLY) == 0);
 693 }
 694
 695 // ----------------------------------------------------------------------------
 696 // Editing
 697 // ----------------------------------------------------------------------------
 698
 699 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 700 {
 701     HWND hWnd = GetHwnd();
 702     long fromChar = from;
 703     long toChar = to;
 704
 705     // Set selection and remove it
 706 #ifdef __WIN32__
 707     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 708     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)TRUE, (LPARAM)value.c_str());
 709 #else
 710     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 711     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)0, (LPARAM)value.c_str());
 712 #endif
 713 }
 714
 715 void wxTextCtrl::Remove(long from, long to)
 716 {
 717     HWND hWnd = GetHwnd();
 718     long fromChar = from;
 719     long toChar = to;
 720
 721     // Cut all selected text
 722 #ifdef __WIN32__
 723     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 724     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)TRUE, (LPARAM)"");
 725 #else
 726     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 727     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)0, (LPARAM)"");
 728 #endif
 729 }
 730
 731 void wxTextCtrl::SetSelection(long from, long to)
 732 {
 733     HWND hWnd = GetHwnd();
 734     long fromChar = from;
 735     long toChar = to;
 736
 737     // if from and to are both -1, it means (in wxWindows) that all text should
 738     // be selected. Translate into Windows convention
 739     if ((from == -1) && (to == -1))
 740     {
 741       fromChar = 0;
 742       toChar = -1;
 743     }
 744
 745 #ifdef __WIN32__
 746     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 747     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 748 #else
 749     // WPARAM is 0: selection is scrolled into view
 750     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 751 #endif
 752 }
 753
 754 bool wxTextCtrl::LoadFile(const wxString& file)
 755 {
 756     if ( wxTextCtrlBase::LoadFile(file) )
 757     {
 758         // update the size limit if needed
 759         AdjustSpaceLimit();
 760
 761         return TRUE;
 762     }
 763
 764     return FALSE;
 765 }
 766
 767 bool wxTextCtrl::IsModified() const
 768 {
 769     return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
 770 }
 771
 772 // Makes 'unmodified'
 773 void wxTextCtrl::DiscardEdits()
 774 {
 775     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 776 }
 777
 778 int wxTextCtrl::GetNumberOfLines() const
 779 {
 780     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 781 }
 782
 783 long wxTextCtrl::XYToPosition(long x, long y) const
 784 {
 785     HWND hWnd = GetHwnd();
 786
 787     // This gets the char index for the _beginning_ of this line
 788     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 789     return (long)(x + charIndex);
 790 }
 791
 792 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 793 {
 794     HWND hWnd = GetHwnd();
 795
 796     // This gets the line number containing the character
 797     int lineNo;
 798 #if wxUSE_RICHEDIT
 799     if ( m_isRich )
 800     {
 801         lineNo = (int)SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
 802     }
 803     else
 804 #endif // wxUSE_RICHEDIT
 805         lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
 806
 807     if ( lineNo == -1 )
 808     {
 809         // no such line
 810         return FALSE;
 811     }
 812
 813     // This gets the char index for the _beginning_ of this line
 814     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 815     if ( charIndex == -1 )
 816     {
 817         return FALSE;
 818     }
 819
 820     // The X position must therefore be the different between pos and charIndex
 821     if ( x )
 822         *x = (long)(pos - charIndex);
 823     if ( y )
 824         *y = (long)lineNo;
 825
 826     return TRUE;
 827 }
 828
 829 void wxTextCtrl::ShowPosition(long pos)
 830 {
 831     HWND hWnd = GetHwnd();
 832
 833     // To scroll to a position, we pass the number of lines and characters
 834     // to scroll *by*. This means that we need to:
 835     // (1) Find the line position of the current line.
 836     // (2) Find the line position of pos.
 837     // (3) Scroll by (pos - current).
 838     // For now, ignore the horizontal scrolling.
 839
 840     // Is this where scrolling is relative to - the line containing the caret?
 841     // Or is the first visible line??? Try first visible line.
 842 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 843
 844     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 845
 846     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 847
 848     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 849
 850     if (linesToScroll != 0)
 851       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 852 }
 853
 854 int wxTextCtrl::GetLineLength(long lineNo) const
 855 {
 856     long charIndex = XYToPosition(0, lineNo);
 857     int len = (int)SendMessage(GetHwnd(), EM_LINELENGTH, charIndex, 0);
 858     return len;
 859 }
 860
 861 wxString wxTextCtrl::GetLineText(long lineNo) const
 862 {
 863     size_t len = (size_t)GetLineLength(lineNo) + 1;
 864
 865     // there must be at least enough place for the length WORD in the
 866     // buffer
 867     len += sizeof(WORD);
 868
 869     wxString str;
 870     wxChar *buf = str.GetWriteBuf(len);
 871
 872     *(WORD *)buf = (WORD)len;
 873     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
 874     buf[len] = 0;
 875
 876     str.UngetWriteBuf(len);
 877
 878     return str;
 879 }
 880
 881 // ----------------------------------------------------------------------------
 882 // Undo/redo
 883 // ----------------------------------------------------------------------------
 884
 885 void wxTextCtrl::Undo()
 886 {
 887     if (CanUndo())
 888     {
 889         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 890     }
 891 }
 892
 893 void wxTextCtrl::Redo()
 894 {
 895     if (CanRedo())
 896     {
 897         // Same as Undo, since Undo undoes the undo, i.e. a redo.
 898         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 899     }
 900 }
 901
 902 bool wxTextCtrl::CanUndo() const
 903 {
 904     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 905 }
 906
 907 bool wxTextCtrl::CanRedo() const
 908 {
 909     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 910 }
 911
 912 // ----------------------------------------------------------------------------
 913 // implemenation details
 914 // ----------------------------------------------------------------------------
 915
 916 void wxTextCtrl::Command(wxCommandEvent & event)
 917 {
 918     SetValue(event.GetString());
 919     ProcessCommand (event);
 920 }
 921
 922 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 923 {
 924     // By default, load the first file into the text window.
 925     if (event.GetNumberOfFiles() > 0)
 926     {
 927         LoadFile(event.GetFiles()[0]);
 928     }
 929 }
 930
 931 // ----------------------------------------------------------------------------
 932 // kbd input processing
 933 // ----------------------------------------------------------------------------
 934
 935 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
 936 {
 937     MSG *msg = (MSG *)pMsg;
 938
 939     // check for our special keys here: if we don't do it and the parent frame
 940     // uses them as accelerators, they wouldn't work at all, so we disable
 941     // usual preprocessing for them
 942     if ( msg->message == WM_KEYDOWN )
 943     {
 944         WORD vkey = msg->wParam;
 945         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
 946         {
 947             if ( vkey == VK_BACK )
 948                 return FALSE;
 949         }
 950         else // no Alt
 951         {
 952             if ( wxIsCtrlDown() )
 953             {
 954                 switch ( vkey )
 955                 {
 956                     case 'C':
 957                     case 'V':
 958                     case 'X':
 959                     case VK_INSERT:
 960                     case VK_DELETE:
 961                     case VK_HOME:
 962                     case VK_END:
 963                         return FALSE;
 964                 }
 965             }
 966             else if ( wxIsShiftDown() )
 967             {
 968                 if ( vkey == VK_INSERT || vkey == VK_DELETE )
 969                     return FALSE;
 970             }
 971         }
 972     }
 973
 974     return wxControl::MSWShouldPreProcessMessage(pMsg);
 975 }
 976
 977 void wxTextCtrl::OnChar(wxKeyEvent& event)
 978 {
 979     switch ( event.KeyCode() )
 980     {
 981         case WXK_RETURN:
 982             if ( !(m_windowStyle & wxTE_MULTILINE) )
 983             {
 984                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 985                 InitCommandEvent(event);
 986                 event.SetString(GetValue());
 987                 if ( GetEventHandler()->ProcessEvent(event) )
 988                     return;
 989             }
 990             //else: multiline controls need Enter for themselves
 991
 992             break;
 993
 994         case WXK_TAB:
 995             // always produce navigation event - even if we process TAB
 996             // ourselves the fact that we got here means that the user code
 997             // decided to skip processing of this TAB - probably to let it
 998             // do its default job.
 999             {
1000                 wxNavigationKeyEvent eventNav;
1001                 eventNav.SetDirection(!event.ShiftDown());
1002                 eventNav.SetWindowChange(event.ControlDown());
1003                 eventNav.SetEventObject(this);
1004
1005                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1006                     return;
1007             }
1008             break;
1009     }
1010
1011     // no, we didn't process it
1012     event.Skip();
1013 }
1014
1015 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1016 {
1017     switch (param)
1018     {
1019         case EN_SETFOCUS:
1020         case EN_KILLFOCUS:
1021             {
1022                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1023                         : wxEVT_SET_FOCUS,
1024                         m_windowId);
1025                 event.SetEventObject( this );
1026                 GetEventHandler()->ProcessEvent(event);
1027             }
1028             break;
1029
1030         case EN_CHANGE:
1031             {
1032                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1033                 InitCommandEvent(event);
1034                 event.SetString(GetValue());
1035                 ProcessCommand(event);
1036             }
1037             break;
1038
1039         case EN_MAXTEXT:
1040             // the text size limit has been hit - increase it
1041             AdjustSpaceLimit();
1042             break;
1043
1044             // the other notification messages are not processed
1045         case EN_UPDATE:
1046         case EN_ERRSPACE:
1047         case EN_HSCROLL:
1048         case EN_VSCROLL:
1049             return FALSE;
1050         default:
1051             return FALSE;
1052     }
1053
1054     // processed
1055     return TRUE;
1056 }
1057
1058 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1059 #if wxUSE_CTL3D
1060                                WXUINT message,
1061                                WXWPARAM wParam,
1062                                WXLPARAM lParam
1063 #else
1064                                WXUINT WXUNUSED(message),
1065                                WXWPARAM WXUNUSED(wParam),
1066                                WXLPARAM WXUNUSED(lParam)
1067 #endif
1068     )
1069 {
1070 #if wxUSE_CTL3D
1071     if ( m_useCtl3D )
1072     {
1073         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1074         return (WXHBRUSH) hbrush;
1075     }
1076 #endif // wxUSE_CTL3D
1077
1078     HDC hdc = (HDC)pDC;
1079     if (GetParent()->GetTransparentBackground())
1080         SetBkMode(hdc, TRANSPARENT);
1081     else
1082         SetBkMode(hdc, OPAQUE);
1083
1084     wxColour colBack = GetBackgroundColour();
1085
1086     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1087         colBack = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
1088
1089     ::SetBkColor(hdc, wxColourToRGB(colBack));
1090     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1091
1092     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1093
1094     return (WXHBRUSH)brush->GetResourceHandle();
1095 }
1096
1097 // In WIN16, need to override normal erasing because
1098 // Ctl3D doesn't use the wxWindows background colour.
1099 #ifdef __WIN16__
1100 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1101 {
1102     wxColour col(m_backgroundColour);
1103
1104 #if wxUSE_CTL3D
1105     if (m_useCtl3D)
1106         col = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
1107 #endif
1108
1109     RECT rect;
1110     ::GetClientRect(GetHwnd(), &rect);
1111
1112     COLORREF ref = PALETTERGB(col.Red(),
1113                               col.Green(),
1114                               col.Blue());
1115     HBRUSH hBrush = ::CreateSolidBrush(ref);
1116     if ( !hBrush )
1117         wxLogLastError(wxT("CreateSolidBrush"));
1118
1119     HDC hdc = (HDC)event.GetDC()->GetHDC();
1120
1121     int mode = ::SetMapMode(hdc, MM_TEXT);
1122
1123     ::FillRect(hdc, &rect, hBrush);
1124     ::DeleteObject(hBrush);
1125     ::SetMapMode(hdc, mode);
1126
1127 }
1128 #endif
1129
1130 void wxTextCtrl::AdjustSpaceLimit()
1131 {
1132 #ifndef __WIN16__
1133     unsigned int len = ::GetWindowTextLength(GetHwnd()),
1134     limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1135     if ( len >= limit )
1136     {
1137         limit = len + 0x8000;    // 32Kb
1138
1139 #if wxUSE_RICHEDIT
1140         if ( m_isRich )
1141         {
1142             // as a nice side effect, this also allows passing limit > 64Kb
1143             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1144         }
1145         else
1146 #endif // wxUSE_RICHEDIT
1147         {
1148             if ( limit > 0xffff )
1149             {
1150                 // this will set it to a platform-dependent maximum (much more
1151                 // than 64Kb under NT)
1152                 limit = 0;
1153             }
1154
1155             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1156         }
1157     }
1158 #endif // !Win16
1159 }
1160
1161 bool wxTextCtrl::AcceptsFocus() const
1162 {
1163     // we don't want focus if we can't be edited
1164     return IsEditable() && wxControl::AcceptsFocus();
1165 }
1166
1167 wxSize wxTextCtrl::DoGetBestSize() const
1168 {
1169     int cx, cy;
1170     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1171
1172     int wText = DEFAULT_ITEM_WIDTH;
1173
1174     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1175     if ( m_windowStyle & wxTE_MULTILINE )
1176     {
1177         hText *= wxMax(GetNumberOfLines(), 5);
1178     }
1179     //else: for single line control everything is ok
1180
1181     return wxSize(wText, hText);
1182 }
1183
1184 // ----------------------------------------------------------------------------
1185 // standard handlers for standard edit menu events
1186 // ----------------------------------------------------------------------------
1187
1188 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1189 {
1190     Cut();
1191 }
1192
1193 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1194 {
1195     Copy();
1196 }
1197
1198 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1199 {
1200     Paste();
1201 }
1202
1203 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1204 {
1205     Undo();
1206 }
1207
1208 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1209 {
1210     Redo();
1211 }
1212
1213 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1214 {
1215     event.Enable( CanCut() );
1216 }
1217
1218 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1219 {
1220     event.Enable( CanCopy() );
1221 }
1222
1223 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1224 {
1225     event.Enable( CanPaste() );
1226 }
1227
1228 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1229 {
1230     event.Enable( CanUndo() );
1231 }
1232
1233 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1234 {
1235     event.Enable( CanRedo() );
1236 }
1237
1238 // the rest of the file only deals with the rich edit controls
1239 #if wxUSE_RICHEDIT
1240
1241 // ----------------------------------------------------------------------------
1242 // EN_LINK processing
1243 // ----------------------------------------------------------------------------
1244
1245 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1246 {
1247     NMHDR *hdr = (NMHDR* )lParam;
1248     if ( hdr->code == EN_LINK )
1249     {
1250         ENLINK *enlink = (ENLINK *)hdr;
1251
1252         switch ( enlink->msg )
1253         {
1254             case WM_SETCURSOR:
1255                 // ok, so it is hardcoded - do we really nee to customize it?
1256                 ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1257                 *result = TRUE;
1258                 break;
1259
1260             case WM_MOUSEMOVE:
1261             case WM_LBUTTONDOWN:
1262             case WM_LBUTTONUP:
1263             case WM_LBUTTONDBLCLK:
1264             case WM_RBUTTONDOWN:
1265             case WM_RBUTTONUP:
1266             case WM_RBUTTONDBLCLK:
1267                 // send a mouse event
1268                 {
1269                     static const wxEventType eventsMouse[] =
1270                     {
1271                         wxEVT_MOTION,
1272                         wxEVT_LEFT_DOWN,
1273                         wxEVT_LEFT_UP,
1274                         wxEVT_LEFT_DCLICK,
1275                         wxEVT_RIGHT_DOWN,
1276                         wxEVT_RIGHT_UP,
1277                         wxEVT_RIGHT_DCLICK,
1278                     };
1279
1280                     // the event ids are consecutive
1281                     wxMouseEvent
1282                         evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1283
1284                     InitMouseEvent(evtMouse,
1285                                    GET_X_LPARAM(enlink->lParam),
1286                                    GET_Y_LPARAM(enlink->lParam),
1287                                    enlink->wParam);
1288
1289                     wxTextUrlEvent event(m_windowId, evtMouse,
1290                                          enlink->chrg.cpMin,
1291                                          enlink->chrg.cpMax);
1292
1293                     InitCommandEvent(event);
1294
1295                     *result = ProcessCommand(event);
1296                 }
1297                 break;
1298         }
1299
1300         return TRUE;
1301     }
1302
1303     // not processed
1304     return FALSE;
1305 }
1306
1307 // ----------------------------------------------------------------------------
1308 // colour setting for the rich edit controls
1309 // ----------------------------------------------------------------------------
1310
1311 // Watcom C++ doesn't define this
1312 #ifndef SCF_ALL
1313 #define SCF_ALL 0x0004
1314 #endif
1315
1316 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1317 {
1318     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1319     {
1320         // colour didn't really change
1321         return FALSE;
1322     }
1323
1324     if ( IsRich() )
1325     {
1326         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1327         // EM_SETBKGNDCOLOR additionally
1328         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1329     }
1330
1331     return TRUE;
1332 }
1333
1334 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1335 {
1336     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1337     {
1338         // colour didn't really change
1339         return FALSE;
1340     }
1341
1342     if ( IsRich() )
1343     {
1344         // change the colour of everything
1345         CHARFORMAT cf;
1346         wxZeroMemory(cf);
1347         cf.cbSize = sizeof(cf);
1348         cf.dwMask = CFM_COLOR;
1349         cf.crTextColor = wxColourToRGB(colour);
1350         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1351     }
1352
1353     return TRUE;
1354 }
1355
1356 // ----------------------------------------------------------------------------
1357 // styling support for rich edit controls
1358 // ----------------------------------------------------------------------------
1359
1360 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1361 {
1362     if ( !IsRich() )
1363     {
1364         // can't do it with normal text control
1365         return FALSE;
1366     }
1367
1368     // the rich text control doesn't handle setting background colour, so don't
1369     // even try if it's the only thing we want to change
1370     if ( wxRichEditModule::GetLoadedVersion() < 2 &&
1371          !style.HasFont() && !style.HasTextColour() )
1372     {
1373         // nothing to do: return TRUE if there was really nothing to do and
1374         // FALSE if we failed to set bg colour
1375         return !style.HasBackgroundColour();
1376     }
1377
1378     // order the range if needed
1379     if ( start > end )
1380     {
1381         long tmp = start;
1382         start = end;
1383         end = tmp;
1384     }
1385
1386     // we can only change the format of the selection, so select the range we
1387     // want and restore the old selection later
1388     long startOld, endOld;
1389     GetSelection(&startOld, &endOld);
1390
1391     // but do we really have to change the selection?
1392     bool changeSel = start != startOld || end != endOld;
1393
1394     if ( changeSel )
1395         SendMessage(GetHwnd(), EM_SETSEL, (WPARAM) start, (LPARAM) end);
1396
1397     // initialize CHARFORMAT struct
1398 #if wxUSE_RICHEDIT2
1399     CHARFORMAT2 cf;
1400 #else
1401     CHARFORMAT cf;
1402 #endif
1403     wxZeroMemory(cf);
1404     cf.cbSize = sizeof(cf);
1405
1406     if ( style.HasFont() )
1407     {
1408         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1409                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1410
1411         // fill in data from LOGFONT but recalculate lfHeight because we need
1412         // the real height in twips and not the negative number which
1413         // wxFillLogFont() returns (this is correct in general and works with
1414         // the Windows font mapper, but not here)
1415         LOGFONT lf;
1416         wxFillLogFont(&lf, &style.GetFont());
1417         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1418         cf.bCharSet = lf.lfCharSet;
1419         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1420         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1421
1422         // also deal with underline/italic/bold attributes: note that we must
1423         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1424         // style to allow clearing it
1425         if ( lf.lfItalic )
1426         {
1427             cf.dwEffects |= CFE_ITALIC;
1428         }
1429
1430         if ( lf.lfWeight == FW_BOLD )
1431         {
1432             cf.dwEffects |= CFE_BOLD;
1433         }
1434
1435         if ( lf.lfUnderline )
1436         {
1437             cf.dwEffects |= CFE_UNDERLINE;
1438         }
1439
1440         // strikeout fonts are not supported by wxWindows
1441     }
1442
1443     if ( style.HasTextColour() )
1444     {
1445         cf.dwMask |= CFM_COLOR;
1446         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1447     }
1448
1449 #if wxUSE_RICHEDIT2
1450     if ( wxRichEditModule::GetLoadedVersion() > 1 && style.HasBackgroundColour() )
1451     {
1452         cf.dwMask |= CFM_BACKCOLOR;
1453         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1454     }
1455 #endif // wxUSE_RICHEDIT2
1456
1457     // do format the selection
1458     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1459                             SCF_SELECTION, (LPARAM)&cf) != 0;
1460     if ( !ok )
1461     {
1462         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1463     }
1464
1465     if ( changeSel )
1466     {
1467         // restore the original selection
1468         SendMessage(GetHwnd(), EM_SETSEL, (WPARAM)startOld, (LPARAM)endOld);
1469     }
1470
1471     return ok;
1472 }
1473
1474 // ----------------------------------------------------------------------------
1475 // wxRichEditModule
1476 // ----------------------------------------------------------------------------
1477
1478 bool wxRichEditModule::OnInit()
1479 {
1480     // don't do anything - we will load it when needed
1481     return TRUE;
1482 }
1483
1484 void wxRichEditModule::OnExit()
1485 {
1486     if ( ms_hRichEdit )
1487     {
1488         FreeLibrary(ms_hRichEdit);
1489     }
1490 }
1491
1492 /* static */
1493 bool wxRichEditModule::Load(int version)
1494 {
1495     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1496                  _T("incorrect richedit control version requested") );
1497
1498     if ( version <= ms_verRichEdit )
1499     {
1500         // we've already got this or better
1501         return TRUE;
1502     }
1503
1504     if ( ms_hRichEdit )
1505     {
1506         ::FreeLibrary(ms_hRichEdit);
1507     }
1508
1509     // always try load riched20.dll first - like this we won't have to reload
1510     // it later if we're first asked for RE 1 and then for RE 2 or 3
1511     wxString dllname = _T("riched20.dll");
1512     ms_hRichEdit = ::LoadLibrary(dllname);
1513     ms_verRichEdit = 2; // no way to tell if it's 2 or 3, assume 2
1514
1515     if ( !ms_hRichEdit && (version == 1) )
1516     {
1517         // fall back to RE 1
1518         dllname = _T("riched32.dll");
1519         ms_hRichEdit = ::LoadLibrary(dllname);
1520         ms_verRichEdit = 1;
1521     }
1522
1523     if ( !ms_hRichEdit )
1524     {
1525         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1526
1527         ms_verRichEdit = -1;
1528
1529         return FALSE;
1530     }
1531
1532     return TRUE;
1533 }
1534
1535 #endif // wxUSE_RICHEDIT
1536
1537 #endif // wxUSE_TEXTCTRL