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 #ifndef SF_UNICODE
  95     #define SF_UNICODE 0x0010
  96 #endif
  97
  98 // ----------------------------------------------------------------------------
  99 // private functions
 100 // ----------------------------------------------------------------------------
 101
 102 #if wxUSE_RICHEDIT
 103
 104 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb);
 105
 106 #endif // wxUSE_RICHEDIT
 107
 108 // ----------------------------------------------------------------------------
 109 // private classes
 110 // ----------------------------------------------------------------------------
 111
 112 #if wxUSE_RICHEDIT
 113
 114 // this module initializes RichEdit DLL if needed
 115 class wxRichEditModule : public wxModule
 116 {
 117 public:
 118     virtual bool OnInit();
 119     virtual void OnExit();
 120
 121     // get the version currently loaded, -1 if none
 122     static int GetLoadedVersion() { return ms_verRichEdit; }
 123
 124     // load the richedit DLL of at least of required version
 125     static bool Load(int version = 1);
 126
 127 private:
 128     // the handle to richedit DLL and the version of the DLL loaded
 129     static HINSTANCE ms_hRichEdit;
 130
 131     // the DLL version loaded or -1 if none
 132     static int ms_verRichEdit;
 133
 134     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
 135 };
 136
 137 HINSTANCE wxRichEditModule::ms_hRichEdit = (HINSTANCE)NULL;
 138 int       wxRichEditModule::ms_verRichEdit = -1;
 139
 140 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 141
 142 #endif // wxUSE_RICHEDIT
 143
 144 // ----------------------------------------------------------------------------
 145 // event tables and other macros
 146 // ----------------------------------------------------------------------------
 147
 148 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 149
 150 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 151     EVT_CHAR(wxTextCtrl::OnChar)
 152     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 153
 154     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 155     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 156     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 157     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 158     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 159
 160     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 161     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 162     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 163     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 164     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 165 #ifdef __WIN16__
 166     EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
 167 #endif
 168 END_EVENT_TABLE()
 169
 170 // ============================================================================
 171 // implementation
 172 // ============================================================================
 173
 174 // ----------------------------------------------------------------------------
 175 // creation
 176 // ----------------------------------------------------------------------------
 177
 178 void wxTextCtrl::Init()
 179 {
 180 #if wxUSE_RICHEDIT
 181     m_verRichEdit = 0;
 182 #endif
 183 }
 184
 185 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 186                         const wxString& value,
 187                         const wxPoint& pos,
 188                         const wxSize& size,
 189                         long style,
 190                         const wxValidator& validator,
 191                         const wxString& name)
 192 {
 193     // base initialization
 194     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 195         return FALSE;
 196
 197     if ( parent )
 198         parent->AddChild(this);
 199
 200     // translate wxWin style flags to MSW ones, checking for consistency while
 201     // doing it
 202     long msStyle = ES_LEFT | WS_TABSTOP;
 203
 204     if ( m_windowStyle & wxCLIP_SIBLINGS )
 205         msStyle |= WS_CLIPSIBLINGS;
 206
 207     if ( m_windowStyle & wxTE_MULTILINE )
 208     {
 209         wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
 210                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 211
 212         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 213         if ((m_windowStyle & wxTE_NO_VSCROLL) == 0)
 214             msStyle |= WS_VSCROLL;
 215         m_windowStyle |= wxTE_PROCESS_ENTER;
 216     }
 217     else // !multiline
 218     {
 219         // there is really no reason to not have this style for single line
 220         // text controls
 221         msStyle |= ES_AUTOHSCROLL;
 222     }
 223
 224     if ( m_windowStyle & wxHSCROLL )
 225         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 226
 227     if ( m_windowStyle & wxTE_READONLY )
 228         msStyle |= ES_READONLY;
 229
 230     if ( m_windowStyle & wxTE_PASSWORD )
 231         msStyle |= ES_PASSWORD;
 232
 233     if ( m_windowStyle & wxTE_AUTO_SCROLL )
 234         msStyle |= ES_AUTOHSCROLL;
 235
 236     if ( m_windowStyle & wxTE_NOHIDESEL )
 237         msStyle |= ES_NOHIDESEL;
 238
 239     // we always want the characters and the arrows
 240     m_lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
 241
 242     // we may have several different cases:
 243     // 1. normal case: both TAB and ENTER are used for dialog navigation
 244     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
 245     //    control in the dialog
 246     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
 247     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
 248     //    the next control
 249     if ( m_windowStyle & wxTE_PROCESS_ENTER )
 250         m_lDlgCode |= DLGC_WANTMESSAGE;
 251     if ( m_windowStyle & wxTE_PROCESS_TAB )
 252         m_lDlgCode |= DLGC_WANTTAB;
 253
 254     // do create the control - either an EDIT or RICHEDIT
 255     wxString windowClass = wxT("EDIT");
 256
 257 #if wxUSE_RICHEDIT
 258     if ( m_windowStyle & wxTE_RICH )
 259     {
 260         static bool s_errorGiven = FALSE;   // MT-FIXME
 261
 262         // only give the error msg once if the DLL can't be loaded
 263         if ( !s_errorGiven )
 264         {
 265             // first try to load the RichEdit DLL (will do nothing if already
 266             // done)
 267             if ( !wxRichEditModule::Load() )
 268             {
 269                 wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 270
 271                 s_errorGiven = TRUE;
 272             }
 273         }
 274
 275         if ( !s_errorGiven )
 276         {
 277             msStyle |= ES_AUTOVSCROLL;
 278
 279             m_verRichEdit = wxRichEditModule::GetLoadedVersion();
 280             if ( m_verRichEdit == 1 )
 281             {
 282                 windowClass = wxT("RICHEDIT");
 283             }
 284             else
 285             {
 286 #ifndef RICHEDIT_CLASS
 287                 wxString RICHEDIT_CLASS;
 288                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 289 #if wxUSE_UNICODE
 290                 RICHEDIT_CLASS += _T('W');
 291 #else // ANSI
 292                 RICHEDIT_CLASS += _T('A');
 293 #endif // Unicode/ANSI
 294 #endif // !RICHEDIT_CLASS
 295
 296                 windowClass = RICHEDIT_CLASS;
 297             }
 298         }
 299     }
 300 #endif // wxUSE_RICHEDIT
 301
 302     // we need to turn '\n's into "\r\n"s for the multiline controls
 303     wxString valueWin;
 304     if ( m_windowStyle & wxTE_MULTILINE )
 305     {
 306         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 307     }
 308     else // single line
 309     {
 310         valueWin = value;
 311     }
 312
 313     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 314         return FALSE;
 315
 316     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 317
 318 #if wxUSE_RICHEDIT
 319     if ( IsRich() )
 320     {
 321         // have to enable events manually
 322         LPARAM mask = ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE;
 323
 324         if ( m_windowStyle & wxTE_AUTO_URL )
 325         {
 326             mask |= ENM_LINK;
 327
 328             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 329         }
 330
 331         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 332     }
 333 #endif // wxUSE_RICHEDIT
 334
 335     return TRUE;
 336 }
 337
 338 // Make sure the window style (etc.) reflects the HWND style (roughly)
 339 void wxTextCtrl::AdoptAttributesFromHWND()
 340 {
 341     wxWindow::AdoptAttributesFromHWND();
 342
 343     HWND hWnd = GetHwnd();
 344     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 345
 346     // retrieve the style to see whether this is an edit or richedit ctrl
 347 #if wxUSE_RICHEDIT
 348     wxString classname = wxGetWindowClass(GetHWND());
 349
 350     if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
 351     {
 352         m_verRichEdit = 0;
 353     }
 354     else // rich edit?
 355     {
 356         wxChar c;
 357         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 358         {
 359             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 360
 361             m_verRichEdit = 0;
 362         }
 363     }
 364 #endif // wxUSE_RICHEDIT
 365
 366     if (style & ES_MULTILINE)
 367         m_windowStyle |= wxTE_MULTILINE;
 368     if (style & ES_PASSWORD)
 369         m_windowStyle |= wxTE_PASSWORD;
 370     if (style & ES_READONLY)
 371         m_windowStyle |= wxTE_READONLY;
 372     if (style & ES_WANTRETURN)
 373         m_windowStyle |= wxTE_PROCESS_ENTER;
 374 }
 375
 376 // ----------------------------------------------------------------------------
 377 // set/get the controls text
 378 // ----------------------------------------------------------------------------
 379
 380 wxString wxTextCtrl::GetValue() const
 381 {
 382     // we can't use wxGetWindowText() (i.e. WM_GETTEXT internally) for
 383     // retrieving more than 64Kb under Win9x
 384 #if wxUSE_RICHEDIT
 385     if ( IsRich() )
 386     {
 387         wxString str;
 388
 389         int len = GetWindowTextLength(GetHwnd());
 390         if ( len )
 391         {
 392             // alloc one extra WORD as needed by the control
 393             wxChar *p = str.GetWriteBuf(++len);
 394
 395             TEXTRANGE textRange;
 396             textRange.chrg.cpMin = 0;
 397             textRange.chrg.cpMax = -1;
 398             textRange.lpstrText = p;
 399
 400             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 401
 402             // believe it or not, but EM_GETTEXTRANGE uses just CR ('\r') for
 403             // the newlines which is neither Unix nor Windows style (Win95 with
 404             // riched20.dll shows this behaviour) - convert it to something
 405             // reasonable
 406             for ( ; *p; p++ )
 407             {
 408                 if ( *p == _T('\r') )
 409                     *p = _T('\n');
 410             }
 411
 412             str.UngetWriteBuf();
 413         }
 414         //else: no text at all, leave the string empty
 415
 416         return str;
 417     }
 418 #endif // wxUSE_RICHEDIT
 419
 420     // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 421     // same one as above for consitency
 422     wxString str = wxGetWindowText(GetHWND());
 423
 424     return wxTextFile::Translate(str, wxTextFileType_Unix);
 425 }
 426
 427 void wxTextCtrl::SetValue(const wxString& value)
 428 {
 429     // if the text is long enough, it's faster to just set it instead of first
 430     // comparing it with the old one (chances are that it will be different
 431     // anyhow, this comparison is there to avoid flicker for small single-line
 432     // edit controls mostly)
 433     if ( (value.length() > 0x400) || (value != GetValue()) )
 434     {
 435         // it is simpler to do this but it could be more efficient to reproduce
 436         // WriteText() logic here
 437         Clear();
 438
 439         WriteText(value);
 440
 441         // mark the control as being not dirty - we changed its text, not the
 442         // user
 443         DiscardEdits();
 444
 445         // for compatibility, don't move the cursor when doing SetValue()
 446         SetInsertionPoint(0);
 447     }
 448 }
 449
 450 #if wxUSE_RICHEDIT && !wxUSE_UNICODE
 451
 452 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 453 {
 454     *pcb = 0;
 455
 456     wchar_t *wbuf = (wchar_t *)buf;
 457     const wchar_t *wpc = *(const wchar_t **)dwCookie;
 458     while ( cb && *wpc )
 459     {
 460         *wbuf++ = *wpc++;
 461
 462         cb -= sizeof(wchar_t);
 463         (*pcb) += sizeof(wchar_t);
 464     }
 465
 466     *(const wchar_t **)dwCookie = wpc;
 467
 468     return 0;
 469 }
 470
 471 extern long wxEncodingToCodepage(wxFontEncoding encoding); // from strconv.cpp
 472
 473 bool wxTextCtrl::StreamIn(const wxString& value, wxFontEncoding encoding)
 474 {
 475     // we have to use EM_STREAMIN to force richedit control 2.0+ to show any
 476     // text in the non default charset - otherwise it thinks it knows better
 477     // than we do and always shows it in the default one
 478
 479     // first get the Windows code page for this encoding
 480     long codepage = wxEncodingToCodepage(encoding);
 481     if ( codepage == -1 )
 482     {
 483         // unknown encoding
 484         return FALSE;
 485     }
 486
 487     // next translate to Unicode using this code page
 488     int len = ::MultiByteToWideChar(codepage, 0, value, -1, NULL, 0);
 489     wxWCharBuffer wchBuf(len);
 490     if ( !::MultiByteToWideChar(codepage, 0, value, -1,
 491                                 (wchar_t *)wchBuf.data(), len) )
 492     {
 493         wxLogLastError(_T("MultiByteToWideChar"));
 494     }
 495
 496     // finally, stream it in the control
 497     const wchar_t *wpc = wchBuf;
 498
 499     EDITSTREAM eds;
 500     wxZeroMemory(eds);
 501     eds.dwCookie = (DWORD)&wpc;
 502     // the cast below is needed for broken (very) old mingw32 headers
 503     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 504
 505     if ( !::SendMessage(GetHwnd(), EM_STREAMIN,
 506                         SF_TEXT | SF_UNICODE | SFF_SELECTION,
 507                         (LPARAM)&eds) || eds.dwError )
 508     {
 509         wxLogLastError(_T("EM_STREAMIN"));
 510
 511         return FALSE;
 512     }
 513
 514     return TRUE;
 515 }
 516
 517 #endif // wxUSE_RICHEDIT
 518
 519 void wxTextCtrl::WriteText(const wxString& value)
 520 {
 521     wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 522
 523 #if wxUSE_RICHEDIT
 524     // there are several complications with the rich edit controls here
 525     bool done = FALSE;
 526     if ( IsRich() )
 527     {
 528         // first, ensure that the new text will be in the default style
 529         if ( !m_defaultStyle.IsDefault() )
 530         {
 531             long start, end;
 532             GetSelection(&start, &end);
 533             SetStyle(start, end, m_defaultStyle );
 534         }
 535
 536 #if !wxUSE_UNICODE
 537         // next check if the text we're inserting must be shown in a non
 538         // default charset -- this only works for RichEdit > 1.0
 539         if ( GetRichVersion() > 1 )
 540         {
 541             wxFont font = m_defaultStyle.GetFont();
 542             if ( !font.Ok() )
 543                 font = GetFont();
 544
 545             if ( font.Ok() )
 546             {
 547                wxFontEncoding encoding = font.GetEncoding();
 548                if ( encoding != wxFONTENCODING_SYSTEM )
 549                {
 550                    done = StreamIn(valueDos, encoding);
 551                }
 552             }
 553         }
 554 #endif // !wxUSE_UNICODE
 555     }
 556
 557     if ( !done )
 558 #endif // wxUSE_RICHEDIT
 559     {
 560         ::SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
 561     }
 562
 563     AdjustSpaceLimit();
 564 }
 565
 566 void wxTextCtrl::AppendText(const wxString& text)
 567 {
 568     SetInsertionPointEnd();
 569
 570     WriteText(text);
 571 }
 572
 573 void wxTextCtrl::Clear()
 574 {
 575     ::SetWindowText(GetHwnd(), wxT(""));
 576 }
 577
 578 // ----------------------------------------------------------------------------
 579 // Clipboard operations
 580 // ----------------------------------------------------------------------------
 581
 582 void wxTextCtrl::Copy()
 583 {
 584     if (CanCopy())
 585     {
 586         HWND hWnd = GetHwnd();
 587         SendMessage(hWnd, WM_COPY, 0, 0L);
 588     }
 589 }
 590
 591 void wxTextCtrl::Cut()
 592 {
 593     if (CanCut())
 594     {
 595         HWND hWnd = GetHwnd();
 596         SendMessage(hWnd, WM_CUT, 0, 0L);
 597     }
 598 }
 599
 600 void wxTextCtrl::Paste()
 601 {
 602     if (CanPaste())
 603     {
 604         HWND hWnd = GetHwnd();
 605         SendMessage(hWnd, WM_PASTE, 0, 0L);
 606     }
 607 }
 608
 609 bool wxTextCtrl::CanCopy() const
 610 {
 611     // Can copy if there's a selection
 612     long from, to;
 613     GetSelection(& from, & to);
 614     return (from != to) ;
 615 }
 616
 617 bool wxTextCtrl::CanCut() const
 618 {
 619     // Can cut if there's a selection
 620     long from, to;
 621     GetSelection(& from, & to);
 622     return (from != to) && (IsEditable());
 623 }
 624
 625 bool wxTextCtrl::CanPaste() const
 626 {
 627     if ( !IsEditable() )
 628         return FALSE;
 629
 630 #if wxUSE_RICHEDIT
 631     if ( IsRich() )
 632     {
 633         UINT cf = 0; // 0 == any format
 634
 635         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
 636     }
 637 #endif // wxUSE_RICHEDIT
 638
 639     // Standard edit control: check for straight text on clipboard
 640     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 641         return FALSE;
 642
 643     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
 644     ::CloseClipboard();
 645
 646     return isTextAvailable;
 647 }
 648
 649 // ----------------------------------------------------------------------------
 650 // Accessors
 651 // ----------------------------------------------------------------------------
 652
 653 void wxTextCtrl::SetEditable(bool editable)
 654 {
 655     HWND hWnd = GetHwnd();
 656     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 657 }
 658
 659 void wxTextCtrl::SetInsertionPoint(long pos)
 660 {
 661     SetSelection(pos, pos);
 662
 663 #if wxUSE_RICHEDIT
 664     if ( !IsRich() )
 665 #endif
 666     {
 667         static const wxChar *nothing = _T("");
 668         SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)nothing);
 669     }
 670 }
 671
 672 void wxTextCtrl::SetInsertionPointEnd()
 673 {
 674     long pos = GetLastPosition();
 675     SetInsertionPoint(pos);
 676 }
 677
 678 long wxTextCtrl::GetInsertionPoint() const
 679 {
 680 #if wxUSE_RICHEDIT
 681     if ( IsRich() )
 682     {
 683         CHARRANGE range;
 684         range.cpMin = 0;
 685         range.cpMax = 0;
 686         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 687         return range.cpMin;
 688     }
 689 #endif // wxUSE_RICHEDIT
 690
 691     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 692     return Pos & 0xFFFF;
 693 }
 694
 695 long wxTextCtrl::GetLastPosition() const
 696 {
 697     HWND hWnd = GetHwnd();
 698
 699     // Will always return a number > 0 (according to docs)
 700     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 701
 702     // This gets the char index for the _beginning_ of the last line
 703     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 704
 705     // Get number of characters in the last line. We'll add this to the character
 706     // index for the last line, 1st position.
 707     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 708
 709     return (long)(charIndex + lineLength);
 710 }
 711
 712 // If the return values from and to are the same, there is no
 713 // selection.
 714 void wxTextCtrl::GetSelection(long* from, long* to) const
 715 {
 716 #if wxUSE_RICHEDIT
 717     if ( IsRich() )
 718     {
 719         CHARRANGE charRange;
 720         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
 721
 722         *from = charRange.cpMin;
 723         *to = charRange.cpMax;
 724     }
 725     else
 726 #endif // !wxUSE_RICHEDIT
 727     {
 728         DWORD dwStart, dwEnd;
 729         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
 730
 731         *from = dwStart;
 732         *to = dwEnd;
 733     }
 734 }
 735
 736 wxString wxTextCtrl::GetStringSelection() const
 737 {
 738     // the base class version works correctly for the rich text controls
 739     // because there the lines are terminated with just '\r' which means that
 740     // the string length is not changed in the result of the translations doen
 741     // in GetValue() but for the normal ones when we replace "\r\n" with '\n'
 742     // we break the indices
 743 #if wxUSE_RICHEDIT
 744     if ( IsRich() )
 745         return wxTextCtrlBase::GetStringSelection();
 746 #endif // wxUSE_RICHEDIT
 747
 748     long from, to;
 749     GetSelection(&from, &to);
 750
 751     wxString str;
 752     if ( from < to )
 753     {
 754         str = wxGetWindowText(GetHWND()).Mid(from, to - from);
 755
 756         // and now that we have the correct selection, convert it to the
 757         // correct format
 758         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 759     }
 760
 761     return str;
 762 }
 763
 764 bool wxTextCtrl::IsEditable() const
 765 {
 766     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 767
 768     return ((style & ES_READONLY) == 0);
 769 }
 770
 771 // ----------------------------------------------------------------------------
 772 // selection
 773 // ----------------------------------------------------------------------------
 774
 775 void wxTextCtrl::SetSelection(long from, long to)
 776 {
 777     DoSetSelection(from, to);
 778 }
 779
 780 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
 781 {
 782     // if from and to are both -1, it means (in wxWindows) that all text should
 783     // be selected - translate into Windows convention
 784     if ( (from == -1) && (to == -1) )
 785     {
 786         from = 0;
 787         to = -1;
 788     }
 789
 790     HWND hWnd = GetHwnd();
 791
 792 #ifdef __WIN32__
 793 #if wxUSE_RICHEDIT
 794     if ( IsRich() )
 795     {
 796         CHARRANGE range;
 797         range.cpMin = from;
 798         range.cpMax = to;
 799         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 800     }
 801     else
 802 #endif // wxUSE_RICHEDIT
 803     {
 804         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
 805     }
 806
 807     if ( scrollCaret )
 808     {
 809         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 810     }
 811 #else // Win16
 812     // WPARAM is 0: selection is scrolled into view
 813     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
 814 #endif // Win32/16
 815 }
 816
 817 // ----------------------------------------------------------------------------
 818 // Editing
 819 // ----------------------------------------------------------------------------
 820
 821 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 822 {
 823     // Set selection and remove it
 824     DoSetSelection(from, to, FALSE);
 825
 826     SendMessage(GetHwnd(), EM_REPLACESEL,
 827 #ifdef __WIN32__
 828                 TRUE,
 829 #else
 830                 FALSE,
 831 #endif
 832                 (LPARAM)value.c_str());
 833 }
 834
 835 void wxTextCtrl::Remove(long from, long to)
 836 {
 837     Replace(from, to, _T(""));
 838 }
 839
 840 bool wxTextCtrl::LoadFile(const wxString& file)
 841 {
 842     if ( wxTextCtrlBase::LoadFile(file) )
 843     {
 844         // update the size limit if needed
 845         AdjustSpaceLimit();
 846
 847         return TRUE;
 848     }
 849
 850     return FALSE;
 851 }
 852
 853 bool wxTextCtrl::IsModified() const
 854 {
 855     return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
 856 }
 857
 858 // Makes 'unmodified'
 859 void wxTextCtrl::DiscardEdits()
 860 {
 861     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 862 }
 863
 864 int wxTextCtrl::GetNumberOfLines() const
 865 {
 866     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 867 }
 868
 869 long wxTextCtrl::XYToPosition(long x, long y) const
 870 {
 871     HWND hWnd = GetHwnd();
 872
 873     // This gets the char index for the _beginning_ of this line
 874     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 875     return (long)(x + charIndex);
 876 }
 877
 878 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 879 {
 880     HWND hWnd = GetHwnd();
 881
 882     // This gets the line number containing the character
 883     int lineNo;
 884 #if wxUSE_RICHEDIT
 885     if ( IsRich() )
 886     {
 887         lineNo = (int)SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
 888     }
 889     else
 890 #endif // wxUSE_RICHEDIT
 891         lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
 892
 893     if ( lineNo == -1 )
 894     {
 895         // no such line
 896         return FALSE;
 897     }
 898
 899     // This gets the char index for the _beginning_ of this line
 900     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 901     if ( charIndex == -1 )
 902     {
 903         return FALSE;
 904     }
 905
 906     // The X position must therefore be the different between pos and charIndex
 907     if ( x )
 908         *x = (long)(pos - charIndex);
 909     if ( y )
 910         *y = (long)lineNo;
 911
 912     return TRUE;
 913 }
 914
 915 void wxTextCtrl::ShowPosition(long pos)
 916 {
 917     HWND hWnd = GetHwnd();
 918
 919     // To scroll to a position, we pass the number of lines and characters
 920     // to scroll *by*. This means that we need to:
 921     // (1) Find the line position of the current line.
 922     // (2) Find the line position of pos.
 923     // (3) Scroll by (pos - current).
 924     // For now, ignore the horizontal scrolling.
 925
 926     // Is this where scrolling is relative to - the line containing the caret?
 927     // Or is the first visible line??? Try first visible line.
 928 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 929
 930     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 931
 932     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 933
 934     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 935
 936     if (linesToScroll != 0)
 937       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 938 }
 939
 940 int wxTextCtrl::GetLineLength(long lineNo) const
 941 {
 942     long charIndex = XYToPosition(0, lineNo);
 943     int len = (int)SendMessage(GetHwnd(), EM_LINELENGTH, charIndex, 0);
 944     return len;
 945 }
 946
 947 wxString wxTextCtrl::GetLineText(long lineNo) const
 948 {
 949     size_t len = (size_t)GetLineLength(lineNo) + 1;
 950
 951     // there must be at least enough place for the length WORD in the
 952     // buffer
 953     len += sizeof(WORD);
 954
 955     wxString str;
 956     wxChar *buf = str.GetWriteBuf(len);
 957
 958     *(WORD *)buf = (WORD)len;
 959     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
 960     buf[len] = 0;
 961
 962     str.UngetWriteBuf(len);
 963
 964     return str;
 965 }
 966
 967 void wxTextCtrl::SetMaxLength(unsigned long len)
 968 {
 969     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
 970 }
 971
 972 // ----------------------------------------------------------------------------
 973 // Undo/redo
 974 // ----------------------------------------------------------------------------
 975
 976 void wxTextCtrl::Undo()
 977 {
 978     if (CanUndo())
 979     {
 980         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 981     }
 982 }
 983
 984 void wxTextCtrl::Redo()
 985 {
 986     if (CanRedo())
 987     {
 988         // Same as Undo, since Undo undoes the undo, i.e. a redo.
 989         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 990     }
 991 }
 992
 993 bool wxTextCtrl::CanUndo() const
 994 {
 995     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 996 }
 997
 998 bool wxTextCtrl::CanRedo() const
 999 {
1000     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
1001 }
1002
1003 // ----------------------------------------------------------------------------
1004 // implemenation details
1005 // ----------------------------------------------------------------------------
1006
1007 void wxTextCtrl::Command(wxCommandEvent & event)
1008 {
1009     SetValue(event.GetString());
1010     ProcessCommand (event);
1011 }
1012
1013 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1014 {
1015     // By default, load the first file into the text window.
1016     if (event.GetNumberOfFiles() > 0)
1017     {
1018         LoadFile(event.GetFiles()[0]);
1019     }
1020 }
1021
1022 // ----------------------------------------------------------------------------
1023 // kbd input processing
1024 // ----------------------------------------------------------------------------
1025
1026 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1027 {
1028     MSG *msg = (MSG *)pMsg;
1029
1030     // check for our special keys here: if we don't do it and the parent frame
1031     // uses them as accelerators, they wouldn't work at all, so we disable
1032     // usual preprocessing for them
1033     if ( msg->message == WM_KEYDOWN )
1034     {
1035         WORD vkey = msg->wParam;
1036         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1037         {
1038             if ( vkey == VK_BACK )
1039                 return FALSE;
1040         }
1041         else // no Alt
1042         {
1043             if ( wxIsCtrlDown() )
1044             {
1045                 switch ( vkey )
1046                 {
1047                     case 'C':
1048                     case 'V':
1049                     case 'X':
1050                     case VK_INSERT:
1051                     case VK_DELETE:
1052                     case VK_HOME:
1053                     case VK_END:
1054                         return FALSE;
1055                 }
1056             }
1057             else if ( wxIsShiftDown() )
1058             {
1059                 if ( vkey == VK_INSERT || vkey == VK_DELETE )
1060                     return FALSE;
1061             }
1062         }
1063     }
1064
1065     return wxControl::MSWShouldPreProcessMessage(pMsg);
1066 }
1067
1068 void wxTextCtrl::OnChar(wxKeyEvent& event)
1069 {
1070     switch ( event.KeyCode() )
1071     {
1072         case WXK_RETURN:
1073             if ( !(m_windowStyle & wxTE_MULTILINE) )
1074             {
1075                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1076                 InitCommandEvent(event);
1077                 event.SetString(GetValue());
1078                 if ( GetEventHandler()->ProcessEvent(event) )
1079                     return;
1080             }
1081             //else: multiline controls need Enter for themselves
1082
1083             break;
1084
1085         case WXK_TAB:
1086             // always produce navigation event - even if we process TAB
1087             // ourselves the fact that we got here means that the user code
1088             // decided to skip processing of this TAB - probably to let it
1089             // do its default job.
1090             {
1091                 wxNavigationKeyEvent eventNav;
1092                 eventNav.SetDirection(!event.ShiftDown());
1093                 eventNav.SetWindowChange(event.ControlDown());
1094                 eventNav.SetEventObject(this);
1095
1096                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1097                     return;
1098             }
1099             break;
1100     }
1101
1102     // no, we didn't process it
1103     event.Skip();
1104 }
1105
1106 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1107 {
1108     switch (param)
1109     {
1110         case EN_SETFOCUS:
1111         case EN_KILLFOCUS:
1112             {
1113                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1114                                                          : wxEVT_SET_FOCUS,
1115                                    m_windowId);
1116                 event.SetEventObject( this );
1117                 GetEventHandler()->ProcessEvent(event);
1118             }
1119             break;
1120
1121         case EN_CHANGE:
1122             {
1123                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1124                 InitCommandEvent(event);
1125                 event.SetString(GetValue());
1126                 ProcessCommand(event);
1127             }
1128             break;
1129
1130         case EN_MAXTEXT:
1131             // the text size limit has been hit - increase it
1132             if ( !AdjustSpaceLimit() )
1133             {
1134                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1135                 InitCommandEvent(event);
1136                 event.SetString(GetValue());
1137                 ProcessCommand(event);
1138             }
1139             break;
1140
1141             // the other notification messages are not processed
1142         case EN_UPDATE:
1143         case EN_ERRSPACE:
1144         case EN_HSCROLL:
1145         case EN_VSCROLL:
1146             return FALSE;
1147         default:
1148             return FALSE;
1149     }
1150
1151     // processed
1152     return TRUE;
1153 }
1154
1155 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1156 #if wxUSE_CTL3D
1157                                WXUINT message,
1158                                WXWPARAM wParam,
1159                                WXLPARAM lParam
1160 #else
1161                                WXUINT WXUNUSED(message),
1162                                WXWPARAM WXUNUSED(wParam),
1163                                WXLPARAM WXUNUSED(lParam)
1164 #endif
1165     )
1166 {
1167 #if wxUSE_CTL3D
1168     if ( m_useCtl3D )
1169     {
1170         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1171         return (WXHBRUSH) hbrush;
1172     }
1173 #endif // wxUSE_CTL3D
1174
1175     HDC hdc = (HDC)pDC;
1176     if (GetParent()->GetTransparentBackground())
1177         SetBkMode(hdc, TRANSPARENT);
1178     else
1179         SetBkMode(hdc, OPAQUE);
1180
1181     wxColour colBack = GetBackgroundColour();
1182
1183     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1184         colBack = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
1185
1186     ::SetBkColor(hdc, wxColourToRGB(colBack));
1187     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1188
1189     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1190
1191     return (WXHBRUSH)brush->GetResourceHandle();
1192 }
1193
1194 // In WIN16, need to override normal erasing because
1195 // Ctl3D doesn't use the wxWindows background colour.
1196 #ifdef __WIN16__
1197 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1198 {
1199     wxColour col(m_backgroundColour);
1200
1201 #if wxUSE_CTL3D
1202     if (m_useCtl3D)
1203         col = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
1204 #endif
1205
1206     RECT rect;
1207     ::GetClientRect(GetHwnd(), &rect);
1208
1209     COLORREF ref = PALETTERGB(col.Red(),
1210                               col.Green(),
1211                               col.Blue());
1212     HBRUSH hBrush = ::CreateSolidBrush(ref);
1213     if ( !hBrush )
1214         wxLogLastError(wxT("CreateSolidBrush"));
1215
1216     HDC hdc = (HDC)event.GetDC()->GetHDC();
1217
1218     int mode = ::SetMapMode(hdc, MM_TEXT);
1219
1220     ::FillRect(hdc, &rect, hBrush);
1221     ::DeleteObject(hBrush);
1222     ::SetMapMode(hdc, mode);
1223
1224 }
1225 #endif // Win16
1226
1227 bool wxTextCtrl::AdjustSpaceLimit()
1228 {
1229 #ifndef __WIN16__
1230     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1231
1232     // HACK: we try to automatically extend the limit for the amount of text
1233     //       to allow (interactively) entering more than 64Kb of text under
1234     //       Win9x but we shouldn't reset the text limit which was previously
1235     //       set explicitly with SetMaxLength()
1236     //
1237     //       we could solve this by storing the limit we set in wxTextCtrl but
1238     //       to save space we prefer to simply test here the actual limit
1239     //       value: we consider that SetMaxLength() can only be called for
1240     //       values < 32Kb
1241     if ( limit < 0x8000 )
1242     {
1243         // we've got more text than limit set by SetMaxLength()
1244         return FALSE;
1245     }
1246
1247     unsigned int len = ::GetWindowTextLength(GetHwnd());
1248     if ( len >= limit )
1249     {
1250         limit = len + 0x8000;    // 32Kb
1251
1252 #if wxUSE_RICHEDIT
1253         if ( IsRich() )
1254         {
1255             // as a nice side effect, this also allows passing limit > 64Kb
1256             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1257         }
1258         else
1259 #endif // wxUSE_RICHEDIT
1260         {
1261             if ( limit > 0xffff )
1262             {
1263                 // this will set it to a platform-dependent maximum (much more
1264                 // than 64Kb under NT)
1265                 limit = 0;
1266             }
1267
1268             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1269         }
1270     }
1271 #endif // !Win16
1272
1273     // we changed the limit
1274     return TRUE;
1275 }
1276
1277 bool wxTextCtrl::AcceptsFocus() const
1278 {
1279     // we don't want focus if we can't be edited
1280     return IsEditable() && wxControl::AcceptsFocus();
1281 }
1282
1283 wxSize wxTextCtrl::DoGetBestSize() const
1284 {
1285     int cx, cy;
1286     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1287
1288     int wText = DEFAULT_ITEM_WIDTH;
1289
1290     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1291     if ( m_windowStyle & wxTE_MULTILINE )
1292     {
1293         hText *= wxMax(GetNumberOfLines(), 5);
1294     }
1295     //else: for single line control everything is ok
1296
1297     return wxSize(wText, hText);
1298 }
1299
1300 // ----------------------------------------------------------------------------
1301 // standard handlers for standard edit menu events
1302 // ----------------------------------------------------------------------------
1303
1304 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1305 {
1306     Cut();
1307 }
1308
1309 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1310 {
1311     Copy();
1312 }
1313
1314 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1315 {
1316     Paste();
1317 }
1318
1319 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1320 {
1321     Undo();
1322 }
1323
1324 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1325 {
1326     Redo();
1327 }
1328
1329 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1330 {
1331     event.Enable( CanCut() );
1332 }
1333
1334 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1335 {
1336     event.Enable( CanCopy() );
1337 }
1338
1339 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1340 {
1341     event.Enable( CanPaste() );
1342 }
1343
1344 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1345 {
1346     event.Enable( CanUndo() );
1347 }
1348
1349 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1350 {
1351     event.Enable( CanRedo() );
1352 }
1353
1354 // the rest of the file only deals with the rich edit controls
1355 #if wxUSE_RICHEDIT
1356
1357 // ----------------------------------------------------------------------------
1358 // EN_LINK processing
1359 // ----------------------------------------------------------------------------
1360
1361 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1362 {
1363     NMHDR *hdr = (NMHDR* )lParam;
1364     if ( hdr->code == EN_LINK )
1365     {
1366         ENLINK *enlink = (ENLINK *)hdr;
1367
1368         switch ( enlink->msg )
1369         {
1370             case WM_SETCURSOR:
1371                 // ok, so it is hardcoded - do we really nee to customize it?
1372                 ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1373                 *result = TRUE;
1374                 break;
1375
1376             case WM_MOUSEMOVE:
1377             case WM_LBUTTONDOWN:
1378             case WM_LBUTTONUP:
1379             case WM_LBUTTONDBLCLK:
1380             case WM_RBUTTONDOWN:
1381             case WM_RBUTTONUP:
1382             case WM_RBUTTONDBLCLK:
1383                 // send a mouse event
1384                 {
1385                     static const wxEventType eventsMouse[] =
1386                     {
1387                         wxEVT_MOTION,
1388                         wxEVT_LEFT_DOWN,
1389                         wxEVT_LEFT_UP,
1390                         wxEVT_LEFT_DCLICK,
1391                         wxEVT_RIGHT_DOWN,
1392                         wxEVT_RIGHT_UP,
1393                         wxEVT_RIGHT_DCLICK,
1394                     };
1395
1396                     // the event ids are consecutive
1397                     wxMouseEvent
1398                         evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1399
1400                     InitMouseEvent(evtMouse,
1401                                    GET_X_LPARAM(enlink->lParam),
1402                                    GET_Y_LPARAM(enlink->lParam),
1403                                    enlink->wParam);
1404
1405                     wxTextUrlEvent event(m_windowId, evtMouse,
1406                                          enlink->chrg.cpMin,
1407                                          enlink->chrg.cpMax);
1408
1409                     InitCommandEvent(event);
1410
1411                     *result = ProcessCommand(event);
1412                 }
1413                 break;
1414         }
1415
1416         return TRUE;
1417     }
1418
1419     // not processed
1420     return FALSE;
1421 }
1422
1423 // ----------------------------------------------------------------------------
1424 // colour setting for the rich edit controls
1425 // ----------------------------------------------------------------------------
1426
1427 // Watcom C++ doesn't define this
1428 #ifndef SCF_ALL
1429 #define SCF_ALL 0x0004
1430 #endif
1431
1432 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1433 {
1434     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1435     {
1436         // colour didn't really change
1437         return FALSE;
1438     }
1439
1440     if ( IsRich() )
1441     {
1442         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1443         // EM_SETBKGNDCOLOR additionally
1444         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1445     }
1446
1447     return TRUE;
1448 }
1449
1450 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1451 {
1452     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1453     {
1454         // colour didn't really change
1455         return FALSE;
1456     }
1457
1458     if ( IsRich() )
1459     {
1460         // change the colour of everything
1461         CHARFORMAT cf;
1462         wxZeroMemory(cf);
1463         cf.cbSize = sizeof(cf);
1464         cf.dwMask = CFM_COLOR;
1465         cf.crTextColor = wxColourToRGB(colour);
1466         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1467     }
1468
1469     return TRUE;
1470 }
1471
1472 // ----------------------------------------------------------------------------
1473 // styling support for rich edit controls
1474 // ----------------------------------------------------------------------------
1475
1476 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1477 {
1478     if ( !IsRich() )
1479     {
1480         // can't do it with normal text control
1481         return FALSE;
1482     }
1483
1484     // the rich text control doesn't handle setting background colour, so don't
1485     // even try if it's the only thing we want to change
1486     if ( wxRichEditModule::GetLoadedVersion() < 2 &&
1487          !style.HasFont() && !style.HasTextColour() )
1488     {
1489         // nothing to do: return TRUE if there was really nothing to do and
1490         // FALSE if we failed to set bg colour
1491         return !style.HasBackgroundColour();
1492     }
1493
1494     // order the range if needed
1495     if ( start > end )
1496     {
1497         long tmp = start;
1498         start = end;
1499         end = tmp;
1500     }
1501
1502     // we can only change the format of the selection, so select the range we
1503     // want and restore the old selection later
1504     long startOld, endOld;
1505     GetSelection(&startOld, &endOld);
1506
1507     // but do we really have to change the selection?
1508     bool changeSel = start != startOld || end != endOld;
1509
1510     if ( changeSel )
1511     {
1512         DoSetSelection(start, end, FALSE);
1513     }
1514
1515     // initialize CHARFORMAT struct
1516 #if wxUSE_RICHEDIT2
1517     CHARFORMAT2 cf;
1518 #else
1519     CHARFORMAT cf;
1520 #endif
1521     wxZeroMemory(cf);
1522     cf.cbSize = sizeof(cf);
1523
1524     if ( style.HasFont() )
1525     {
1526         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
1527         //     but using it doesn't seem to hurt neither so leaving it for now
1528
1529         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1530                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1531
1532         // fill in data from LOGFONT but recalculate lfHeight because we need
1533         // the real height in twips and not the negative number which
1534         // wxFillLogFont() returns (this is correct in general and works with
1535         // the Windows font mapper, but not here)
1536         LOGFONT lf;
1537         wxFillLogFont(&lf, &style.GetFont());
1538         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1539         cf.bCharSet = lf.lfCharSet;
1540         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1541         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1542
1543         // also deal with underline/italic/bold attributes: note that we must
1544         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1545         // style to allow clearing it
1546         if ( lf.lfItalic )
1547         {
1548             cf.dwEffects |= CFE_ITALIC;
1549         }
1550
1551         if ( lf.lfWeight == FW_BOLD )
1552         {
1553             cf.dwEffects |= CFE_BOLD;
1554         }
1555
1556         if ( lf.lfUnderline )
1557         {
1558             cf.dwEffects |= CFE_UNDERLINE;
1559         }
1560
1561         // strikeout fonts are not supported by wxWindows
1562     }
1563
1564     if ( style.HasTextColour() )
1565     {
1566         cf.dwMask |= CFM_COLOR;
1567         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1568     }
1569
1570 #if wxUSE_RICHEDIT2
1571     if ( wxRichEditModule::GetLoadedVersion() > 1 && style.HasBackgroundColour() )
1572     {
1573         cf.dwMask |= CFM_BACKCOLOR;
1574         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1575     }
1576 #endif // wxUSE_RICHEDIT2
1577
1578     // do format the selection
1579     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1580                             SCF_SELECTION, (LPARAM)&cf) != 0;
1581     if ( !ok )
1582     {
1583         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1584     }
1585
1586     if ( changeSel )
1587     {
1588         // restore the original selection
1589         DoSetSelection(startOld, endOld, FALSE);
1590     }
1591
1592     return ok;
1593 }
1594
1595 // ----------------------------------------------------------------------------
1596 // wxRichEditModule
1597 // ----------------------------------------------------------------------------
1598
1599 bool wxRichEditModule::OnInit()
1600 {
1601     // don't do anything - we will load it when needed
1602     return TRUE;
1603 }
1604
1605 void wxRichEditModule::OnExit()
1606 {
1607     if ( ms_hRichEdit )
1608     {
1609         FreeLibrary(ms_hRichEdit);
1610     }
1611 }
1612
1613 /* static */
1614 bool wxRichEditModule::Load(int version)
1615 {
1616     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1617                  _T("incorrect richedit control version requested") );
1618
1619     if ( version <= ms_verRichEdit )
1620     {
1621         // we've already got this or better
1622         return TRUE;
1623     }
1624
1625     if ( ms_hRichEdit )
1626     {
1627         ::FreeLibrary(ms_hRichEdit);
1628     }
1629
1630     // always try load riched20.dll first - like this we won't have to reload
1631     // it later if we're first asked for RE 1 and then for RE 2 or 3
1632     wxString dllname = _T("riched20.dll");
1633     ms_hRichEdit = ::LoadLibrary(dllname);
1634     ms_verRichEdit = 2; // no way to tell if it's 2 or 3, assume 2
1635
1636     if ( !ms_hRichEdit && (version == 1) )
1637     {
1638         // fall back to RE 1
1639         dllname = _T("riched32.dll");
1640         ms_hRichEdit = ::LoadLibrary(dllname);
1641         ms_verRichEdit = 1;
1642     }
1643
1644     if ( !ms_hRichEdit )
1645     {
1646         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1647
1648         ms_verRichEdit = -1;
1649
1650         return FALSE;
1651     }
1652
1653     return TRUE;
1654 }
1655
1656 #endif // wxUSE_RICHEDIT
1657
1658 #endif // wxUSE_TEXTCTRL