src/motif/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        textctrl.cpp
   3 // Purpose:     wxTextCtrl
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "textctrl.h"
  14 #endif
  15
  16 #include <sys/types.h>
  17 #include <sys/stat.h>
  18 #include <fstream.h>
  19
  20 #include "wx/textctrl.h"
  21 #include "wx/settings.h"
  22 #include "wx/filefn.h"
  23 #include "wx/utils.h"
  24
  25 #if defined(__BORLANDC__) && !defined(__WIN32__)
  26 #include <alloc.h>
  27 #else
  28 #ifndef __GNUWIN32__
  29 #include <malloc.h>
  30 #endif
  31 #endif
  32
  33 #include <Xm/Text.h>
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <ctype.h>
  37
  38 #include "wx/motif/private.h"
  39
  40 static void
  41 wxTextWindowChangedProc (Widget w, XtPointer clientData, XtPointer ptr);
  42 static void
  43 wxTextWindowModifyProc (Widget w, XtPointer clientData, XmTextVerifyCallbackStruct *cbs);
  44 static void
  45 wxTextWindowGainFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs);
  46 static void
  47 wxTextWindowLoseFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs);
  48 static void wxTextWindowActivateProc(Widget w, XtPointer clientData,
  49                       XmAnyCallbackStruct *ptr);
  50
  51 #if !USE_SHARED_LIBRARY
  52 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  53
  54 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  55         EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  56         EVT_CHAR(wxTextCtrl::OnChar)
  57 END_EVENT_TABLE()
  58 #endif
  59
  60 // Text item
  61 wxTextCtrl::wxTextCtrl()
  62 #ifndef NO_TEXT_WINDOW_STREAM
  63  :streambuf()
  64 #endif
  65 {
  66     m_fileName = "";
  67     m_tempCallbackStruct = (void*) NULL;
  68     m_modified = FALSE;
  69     m_processedDefault = FALSE;
  70 }
  71
  72 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
  73                    const wxString& value,
  74            const wxPoint& pos,
  75            const wxSize& size, long style,
  76            const wxValidator& validator,
  77            const wxString& name)
  78 {
  79     m_tempCallbackStruct = (void*) NULL;
  80     m_modified = FALSE;
  81     m_processedDefault = FALSE;
  82     m_fileName = "";
  83     //    m_backgroundColour = parent->GetBackgroundColour();
  84     m_backgroundColour = * wxWHITE;
  85     m_foregroundColour = parent->GetForegroundColour();
  86
  87     SetName(name);
  88     SetValidator(validator);
  89     if (parent) parent->AddChild(this);
  90
  91     m_windowStyle = style;
  92
  93     if ( id == -1 )
  94             m_windowId = (int)NewControlId();
  95     else
  96             m_windowId = id;
  97
  98     Widget parentWidget = (Widget) parent->GetClientWidget();
  99
 100     bool wantHorizScrolling = ((m_windowStyle & wxHSCROLL) != 0);
 101
 102     // If we don't have horizontal scrollbars, we want word wrap.
 103     bool wantWordWrap = !wantHorizScrolling;
 104
 105     if (m_windowStyle & wxTE_MULTILINE)
 106     {
 107         Arg args[2];
 108         XtSetArg (args[0], XmNscrollHorizontal, wantHorizScrolling ? True : False);
 109         XtSetArg (args[1], XmNwordWrap, wantWordWrap ? True : False);
 110
 111         m_mainWidget = (WXWidget) XmCreateScrolledText (parentWidget, (char*) (const char*) name, args, 2);
 112
 113         XtVaSetValues ((Widget) m_mainWidget,
 114                  XmNeditable, ((style & wxTE_READONLY) ? False : True),
 115                  XmNeditMode, XmMULTI_LINE_EDIT,
 116                  NULL);
 117         XtManageChild ((Widget) m_mainWidget);
 118     }
 119     else
 120     {
 121         m_mainWidget = (WXWidget) XtVaCreateManagedWidget ((char*) (const char*) name,
 122                  xmTextWidgetClass, parentWidget,
 123                  NULL);
 124
 125         // TODO: Is this relevant? What does it do?
 126         int noCols = 2;
 127         if (!value.IsNull() && (value.Length() > (unsigned int) noCols))
 128             noCols = value.Length();
 129         XtVaSetValues ((Widget) m_mainWidget,
 130                  XmNcolumns, noCols,
 131                  NULL);
 132     }
 133
 134     if (!value.IsNull())
 135         XmTextSetString ((Widget) m_mainWidget, (char*) (const char*) value);
 136
 137     XtAddCallback((Widget) m_mainWidget, XmNvalueChangedCallback, (XtCallbackProc)wxTextWindowChangedProc, (XtPointer)this);
 138
 139     XtAddCallback((Widget) m_mainWidget, XmNmodifyVerifyCallback, (XtCallbackProc)wxTextWindowModifyProc, (XtPointer)this);
 140
 141     XtAddCallback((Widget) m_mainWidget, XmNactivateCallback, (XtCallbackProc)wxTextWindowActivateProc, (XtPointer)this);
 142
 143     XtAddCallback((Widget) m_mainWidget, XmNfocusCallback, (XtCallbackProc)wxTextWindowGainFocusProc, (XtPointer)this);
 144
 145     XtAddCallback((Widget) m_mainWidget, XmNlosingFocusCallback, (XtCallbackProc)wxTextWindowLoseFocusProc, (XtPointer)this);
 146
 147     m_windowFont = parent->GetFont();
 148     ChangeFont(FALSE);
 149
 150     SetCanAddEventHandler(TRUE);
 151     AttachWidget (parent, m_mainWidget, (WXWidget) NULL, pos.x, pos.y, size.x, size.y);
 152
 153     ChangeBackgroundColour();
 154
 155     return TRUE;
 156 }
 157
 158 WXWidget wxTextCtrl::GetTopWidget() const
 159 {
 160     return ((m_windowStyle & wxTE_MULTILINE) ? (WXWidget) XtParent((Widget) m_mainWidget) : m_mainWidget);
 161 }
 162
 163 wxString wxTextCtrl::GetValue() const
 164 {
 165     if (m_windowStyle & wxTE_PASSWORD)
 166         return m_value;
 167     else
 168     {
 169         char *s = XmTextGetString ((Widget) m_mainWidget);
 170         if (s)
 171         {
 172             wxString str(s);
 173             XtFree (s);
 174             return str;
 175         }
 176         else
 177         {
 178             return wxEmptyString;
 179         }
 180     }
 181 }
 182
 183 void wxTextCtrl::SetValue(const wxString& value)
 184 {
 185   // This assert is wrong -- means that you can't set an empty
 186   // string (IsNull == IsEmpty).
 187   //    wxASSERT_MSG( (!value.IsNull()), "Must not pass a null string to wxTextCtrl::SetValue." ) ;
 188     m_inSetValue = TRUE;
 189
 190     XmTextSetString ((Widget) m_mainWidget, (char*) (const char*) value);
 191
 192     m_inSetValue = FALSE;
 193 }
 194
 195 // Clipboard operations
 196 void wxTextCtrl::Copy()
 197 {
 198     XmTextCopy((Widget) m_mainWidget, CurrentTime);
 199 }
 200
 201 void wxTextCtrl::Cut()
 202 {
 203     XmTextCut((Widget) m_mainWidget, CurrentTime);
 204 }
 205
 206 void wxTextCtrl::Paste()
 207 {
 208     XmTextPaste((Widget) m_mainWidget);
 209 }
 210
 211 void wxTextCtrl::SetEditable(bool editable)
 212 {
 213     XmTextSetEditable((Widget) m_mainWidget, (Boolean) editable);
 214 }
 215
 216 void wxTextCtrl::SetInsertionPoint(long pos)
 217 {
 218     XmTextSetInsertionPosition ((Widget) m_mainWidget, (XmTextPosition) pos);
 219 }
 220
 221 void wxTextCtrl::SetInsertionPointEnd()
 222 {
 223     long pos = GetLastPosition();
 224     SetInsertionPoint(pos);
 225 }
 226
 227 long wxTextCtrl::GetInsertionPoint() const
 228 {
 229     return (long) XmTextGetInsertionPosition ((Widget) m_mainWidget);
 230 }
 231
 232 long wxTextCtrl::GetLastPosition() const
 233 {
 234     return (long) XmTextGetLastPosition ((Widget) m_mainWidget);
 235 }
 236
 237 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 238 {
 239     XmTextReplace ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 240                  (char*) (const char*) value);
 241 }
 242
 243 void wxTextCtrl::Remove(long from, long to)
 244 {
 245     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 246                       (Time) 0);
 247     XmTextRemove ((Widget) m_mainWidget);
 248 }
 249
 250 void wxTextCtrl::SetSelection(long from, long to)
 251 {
 252     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 253                       (Time) 0);
 254 }
 255
 256 bool wxTextCtrl::LoadFile(const wxString& file)
 257 {
 258     if (!wxFileExists(file))
 259         return FALSE;
 260
 261     m_fileName = file;
 262
 263     Clear();
 264
 265     Widget textWidget = (Widget) m_mainWidget;
 266     FILE *fp;
 267
 268     struct stat statb;
 269     if ((stat ((char*) (const char*) file, &statb) == -1) || (statb.st_mode & S_IFMT) != S_IFREG ||
 270       !(fp = fopen ((char*) (const char*) file, "r")))
 271     {
 272       return FALSE;
 273     }
 274     else
 275     {
 276       long len = statb.st_size;
 277       char *text;
 278       if (!(text = XtMalloc ((unsigned) (len + 1))))
 279         {
 280           fclose (fp);
 281           return FALSE;
 282         }
 283       if (fread (text, sizeof (char), len, fp) != (size_t) len)
 284         {
 285         }
 286       fclose (fp);
 287
 288       text[len] = 0;
 289       XmTextSetString (textWidget, text);
 290       //      m_textPosition = len;
 291       XtFree (text);
 292       m_modified = FALSE;
 293       return TRUE;
 294     }
 295 }
 296
 297 // If file is null, try saved file name first
 298 // Returns TRUE if succeeds.
 299 bool wxTextCtrl::SaveFile(const wxString& file)
 300 {
 301     wxString theFile(file);
 302     if (theFile == "")
 303         theFile = m_fileName;
 304     if (theFile == "")
 305         return FALSE;
 306     m_fileName = theFile;
 307
 308   Widget textWidget = (Widget) m_mainWidget;
 309   FILE *fp;
 310
 311   if (!(fp = fopen ((char*) (const char*) theFile, "w")))
 312     {
 313       return FALSE;
 314     }
 315   else
 316     {
 317       char *text = XmTextGetString (textWidget);
 318       long len = XmTextGetLastPosition (textWidget);
 319
 320       if (fwrite (text, sizeof (char), len, fp) != (size_t) len)
 321         {
 322           // Did not write whole file
 323         }
 324       // Make sure newline terminates the file
 325       if (text[len - 1] != '\n')
 326         fputc ('\n', fp);
 327
 328       fclose (fp);
 329       XtFree (text);
 330       m_modified = FALSE;
 331       return TRUE;
 332     }
 333 }
 334
 335 void wxTextCtrl::WriteText(const wxString& text)
 336 {
 337     long textPosition = GetInsertionPoint() + strlen (text);
 338     XmTextInsert ((Widget) m_mainWidget, GetInsertionPoint(), (char*) (const char*) text);
 339     XtVaSetValues ((Widget) m_mainWidget, XmNcursorPosition, textPosition, NULL);
 340     SetInsertionPoint(textPosition);
 341     XmTextShowPosition ((Widget) m_mainWidget, textPosition);
 342     m_modified = TRUE;
 343 }
 344
 345 void wxTextCtrl::Clear()
 346 {
 347     XmTextSetString ((Widget) m_mainWidget, "");
 348     m_modified = FALSE;
 349 }
 350
 351 bool wxTextCtrl::IsModified() const
 352 {
 353     return m_modified;
 354 }
 355
 356 // Makes 'unmodified'
 357 void wxTextCtrl::DiscardEdits()
 358 {
 359     XmTextSetString ((Widget) m_mainWidget, "");
 360     m_modified = FALSE;
 361 }
 362
 363 int wxTextCtrl::GetNumberOfLines() const
 364 {
 365     // HIDEOUSLY inefficient, but we have no choice.
 366     char *s = XmTextGetString ((Widget) m_mainWidget);
 367     if (s)
 368     {
 369       long i = 0;
 370       int currentLine = 0;
 371       bool finished = FALSE;
 372       while (!finished)
 373         {
 374           int ch = s[i];
 375           if (ch == '\n')
 376             {
 377               currentLine++;
 378               i++;
 379             }
 380           else if (ch == 0)
 381             {
 382               finished = TRUE;
 383             }
 384           else
 385             i++;
 386         }
 387
 388       XtFree (s);
 389       return currentLine;
 390     }
 391     return 0;
 392 }
 393
 394 long wxTextCtrl::XYToPosition(long x, long y) const
 395 {
 396 /* It seems, that there is a bug in some versions of the Motif library,
 397    so the original wxWin-Code doesn't work. */
 398 /*
 399   Widget textWidget = (Widget) handle;
 400   return (long) XmTextXYToPos (textWidget, (Position) x, (Position) y);
 401 */
 402     /* Now a little workaround: */
 403     long r=0;
 404     for (int i=0; i<y; i++) r+=(GetLineLength(i)+1);
 405     return r+x;
 406 }
 407
 408 void wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 409 {
 410     Position xx, yy;
 411     XmTextPosToXY((Widget) m_mainWidget, pos, &xx, &yy);
 412     *x = xx; *y = yy;
 413 }
 414
 415 void wxTextCtrl::ShowPosition(long pos)
 416 {
 417     XmTextShowPosition ((Widget) m_mainWidget, (XmTextPosition) pos);
 418 }
 419
 420 int wxTextCtrl::GetLineLength(long lineNo) const
 421 {
 422     wxString str = GetLineText (lineNo);
 423     return (int) str.Length();
 424 }
 425
 426 wxString wxTextCtrl::GetLineText(long lineNo) const
 427 {
 428     // HIDEOUSLY inefficient, but we have no choice.
 429     char *s = XmTextGetString ((Widget) m_mainWidget);
 430
 431     if (s)
 432     {
 433         wxString buf("");
 434         long i;
 435         int currentLine = 0;
 436         for (i = 0; currentLine != lineNo && s[i]; i++ )
 437         if (s[i] == '\n')
 438           currentLine++;
 439         // Now get the text
 440         int j;
 441         for (j = 0; s[i] && s[i] != '\n'; i++, j++ )
 442             buf += s[i];
 443
 444         XtFree(s);
 445         return buf;
 446   }
 447   else
 448     return wxEmptyString;
 449 }
 450
 451 /*
 452  * Text item
 453  */
 454
 455 void wxTextCtrl::Command(wxCommandEvent & event)
 456 {
 457     SetValue (event.GetString());
 458     ProcessCommand (event);
 459 }
 460
 461 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 462 {
 463     // By default, load the first file into the text window.
 464     if (event.GetNumberOfFiles() > 0)
 465     {
 466         LoadFile(event.GetFiles()[0]);
 467     }
 468 }
 469
 470 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 471 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 472
 473 //=========================================================================
 474 // Called then the buffer is full (gcc 2.6.3)
 475 // or when "endl" is output (Borland 4.5)
 476 //=========================================================================
 477 // Class declaration using multiple inheritance doesn't work properly for
 478 // Borland. See note in wb_text.h.
 479 #ifndef NO_TEXT_WINDOW_STREAM
 480 int wxTextCtrl::overflow(int c)
 481 {
 482   // Make sure there is a holding area
 483   if ( allocate()==EOF )
 484   {
 485     wxError("Streambuf allocation failed","Internal error");
 486     return EOF;
 487   }
 488
 489   // Verify that there are no characters in get area
 490   if ( gptr() && gptr() < egptr() )
 491   {
 492      wxError("wxTextCtrl::overflow: Who's trespassing my get area?","Internal error");
 493      return EOF;
 494   }
 495
 496   // Reset get area
 497   setg(0,0,0);
 498
 499   // Make sure there is a put area
 500   if ( ! pptr() )
 501   {
 502 /* This doesn't seem to be fatal so comment out error message */
 503 //    wxError("Put area not opened","Internal error");
 504     setp( base(), base() );
 505   }
 506
 507   // Determine how many characters have been inserted but no consumed
 508   int plen = pptr() - pbase();
 509
 510   // Now Jerry relies on the fact that the buffer is at least 2 chars
 511   // long, but the holding area "may be as small as 1" ???
 512   // And we need an additional \0, so let's keep this inefficient but
 513   // safe copy.
 514
 515   // If c!=EOF, it is a character that must also be comsumed
 516   int xtra = c==EOF? 0 : 1;
 517
 518   // Write temporary C-string to wxTextWindow
 519   {
 520   char *txt = new char[plen+xtra+1];
 521   memcpy(txt, pbase(), plen);
 522   txt[plen] = (char)c;     // append c
 523   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 524     // If the put area already contained \0, output will be truncated there
 525   WriteText(txt);
 526     delete[] txt;
 527   }
 528
 529   // Reset put area
 530   setp(pbase(), epptr());
 531
 532 #if defined(__WATCOMC__)
 533   return __NOT_EOF;
 534 #elif defined(zapeof)     // HP-UX (all cfront based?)
 535   return zapeof(c);
 536 #else
 537   return c!=EOF ? c : 0;  // this should make everybody happy
 538 #endif
 539 }
 540
 541 //=========================================================================
 542 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 543 //=========================================================================
 544 int wxTextCtrl::sync()
 545 {
 546   // Verify that there are no characters in get area
 547   if ( gptr() && gptr() < egptr() )
 548   {
 549      wxError("Who's trespassing my get area?","Internal error");
 550      return EOF;
 551   }
 552
 553   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 554
 555   return 0;
 556 /* OLD CODE
 557   int len = pptr() - pbase();
 558   char *txt = new char[len+1];
 559   strncpy(txt, pbase(), len);
 560   txt[len] = '\0';
 561   (*this) << txt;
 562   setp(pbase(), epptr());
 563   delete[] txt;
 564   return 0;
 565 */
 566 }
 567
 568 //=========================================================================
 569 // Should not be called by a "ostream". Used by a "istream"
 570 //=========================================================================
 571 int wxTextCtrl::underflow()
 572 {
 573   return EOF;
 574 }
 575 #endif
 576
 577 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 578 {
 579     WriteText(s);
 580     return *this;
 581 }
 582
 583 wxTextCtrl& wxTextCtrl::operator<<(float f)
 584 {
 585     wxString str;
 586     str.Printf("%.2f", f);
 587     WriteText(str);
 588     return *this;
 589 }
 590
 591 wxTextCtrl& wxTextCtrl::operator<<(double d)
 592 {
 593     wxString str;
 594     str.Printf("%.2f", d);
 595     WriteText(str);
 596     return *this;
 597 }
 598
 599 wxTextCtrl& wxTextCtrl::operator<<(int i)
 600 {
 601     wxString str;
 602     str.Printf("%d", i);
 603     WriteText(str);
 604     return *this;
 605 }
 606
 607 wxTextCtrl& wxTextCtrl::operator<<(long i)
 608 {
 609     wxString str;
 610     str.Printf("%ld", i);
 611     WriteText(str);
 612     return *this;
 613 }
 614
 615 wxTextCtrl& wxTextCtrl::operator<<(const char c)
 616 {
 617     char buf[2];
 618
 619     buf[0] = c;
 620     buf[1] = 0;
 621     WriteText(buf);
 622     return *this;
 623 }
 624
 625 void wxTextCtrl::OnChar(wxKeyEvent& event)
 626 {
 627   // Indicates that we should generate a normal command, because
 628   // we're letting default behaviour happen (otherwise it's vetoed
 629   // by virtue of overriding OnChar)
 630   m_processedDefault = TRUE;
 631
 632   if (m_tempCallbackStruct)
 633   {
 634     XmTextVerifyCallbackStruct *textStruct =
 635         (XmTextVerifyCallbackStruct *) m_tempCallbackStruct;
 636     textStruct->doit = True;
 637     if (isascii(event.m_keyCode) && (textStruct->text->length == 1))
 638     {
 639       textStruct->text->ptr[0] = ((event.m_keyCode == WXK_RETURN) ? 10 : event.m_keyCode);
 640     }
 641   }
 642 }
 643
 644 void wxTextCtrl::ChangeFont(bool keepOriginalSize)
 645 {
 646     wxWindow::ChangeFont(keepOriginalSize);
 647 }
 648
 649 void wxTextCtrl::ChangeBackgroundColour()
 650 {
 651     wxWindow::ChangeBackgroundColour();
 652
 653     /* TODO: should scrollbars be affected? Should probably have separate
 654      * function to change them (by default, taken from wxSystemSettings)
 655      */
 656     if (m_windowStyle & wxTE_MULTILINE)
 657     {
 658         Widget parent = XtParent ((Widget) m_mainWidget);
 659         Widget hsb, vsb;
 660
 661         XtVaGetValues (parent,
 662                      XmNhorizontalScrollBar, &hsb,
 663                      XmNverticalScrollBar, &vsb,
 664                      NULL);
 665         wxColour backgroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
 666         if (hsb)
 667             DoChangeBackgroundColour((WXWidget) hsb, backgroundColour, TRUE);
 668         if (vsb)
 669             DoChangeBackgroundColour((WXWidget) vsb, backgroundColour, TRUE);
 670
 671         DoChangeBackgroundColour((WXWidget) parent, m_backgroundColour, TRUE);
 672     }
 673 }
 674
 675 void wxTextCtrl::ChangeForegroundColour()
 676 {
 677     wxWindow::ChangeForegroundColour();
 678
 679     if (m_windowStyle & wxTE_MULTILINE)
 680     {
 681         Widget parent = XtParent ((Widget) m_mainWidget);
 682         Widget hsb, vsb;
 683
 684         XtVaGetValues (parent,
 685                      XmNhorizontalScrollBar, &hsb,
 686                      XmNverticalScrollBar, &vsb,
 687                      NULL);
 688
 689         /* TODO: should scrollbars be affected? Should probably have separate
 690          * function to change them (by default, taken from wxSystemSettings)
 691         if (hsb)
 692             DoChangeForegroundColour((WXWidget) hsb, m_foregroundColour);
 693         if (vsb)
 694             DoChangeForegroundColour((WXWidget) vsb, m_foregroundColour);
 695          */
 696         DoChangeForegroundColour((WXWidget) parent, m_foregroundColour);
 697     }
 698 }
 699
 700 static void wxTextWindowChangedProc (Widget w, XtPointer clientData, XtPointer ptr)
 701 {
 702   if (!wxGetWindowFromTable(w))
 703     // Widget has been deleted!
 704     return;
 705
 706   wxTextCtrl *tw = (wxTextCtrl *) clientData;
 707   tw->SetModified(TRUE);
 708 }
 709
 710 static void
 711 wxTextWindowModifyProc (Widget w, XtPointer clientData, XmTextVerifyCallbackStruct *cbs)
 712 {
 713     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 714     tw->m_processedDefault = FALSE;
 715
 716     // First, do some stuff if it's a password control.
 717     // (What does this do exactly?)
 718
 719     if (tw->GetWindowStyleFlag() & wxTE_PASSWORD)
 720     {
 721       /* _sm_
 722        * At least on my system (SunOS 4.1.3 + Motif 1.2), you need to think of
 723        * every event as a replace event.  cbs->text->ptr gives the replacement
 724        * text, cbs->startPos gives the index of the first char affected by the
 725        * replace, and cbs->endPos gives the index one more than the last char
 726        * affected by the replace (startPos == endPos implies an empty range).
 727        * Hence, a deletion is represented by replacing all input text with a
 728        * blank string ("", *not* NULL!).  A simple insertion that does not
 729        * overwrite any text has startPos == endPos.
 730        */
 731
 732         if (tw->m_value.IsNull())
 733         {
 734             tw->m_value = cbs->text->ptr;
 735         }
 736         else
 737         {
 738             char * passwd = (char*) (const char*) tw->m_value;  // Set up a more convenient alias.
 739
 740             int len = passwd ? strlen(passwd) : 0; // Enough room for old text
 741             len += strlen(cbs->text->ptr) + 1;     // + new text (if any) + NUL
 742             len -= cbs->endPos - cbs->startPos;    // - text from affected region.
 743
 744             char * newS = new char [len];
 745             char * p = passwd, * dest = newS, * insert = cbs->text->ptr;
 746
 747             // Copy (old) text from passwd, up to the start posn of the change.
 748             int i;
 749             for (i = 0; i < cbs->startPos; ++i)
 750                 *dest++ = *p++;
 751
 752             // Copy the text to be inserted).
 753             while (*insert)
 754                *dest++ = *insert++;
 755
 756             // Finally, copy into newS any remaining text from passwd[endPos] on.
 757             for (p = passwd + cbs->endPos; *p; )
 758                 *dest++ = *p++;
 759             *dest = 0;
 760
 761             tw->m_value = newS;
 762
 763             delete[] newS;
 764         }
 765
 766         if (cbs->text->length>0)
 767         {
 768             int i;
 769             for (i = 0; i < cbs->text->length; ++i)
 770                 cbs->text->ptr[i] = '*';
 771             cbs->text->ptr[i] = 0;
 772         }
 773     }
 774
 775     // If we're already within an OnChar, return: probably
 776     // a programmatic insertion.
 777     if (tw->m_tempCallbackStruct)
 778         return;
 779
 780     // Check for a backspace
 781     if (cbs->startPos == (cbs->currInsert - 1))
 782     {
 783         tw->m_tempCallbackStruct = (void*) cbs;
 784
 785         wxKeyEvent event (wxEVT_CHAR);
 786         event.SetId(tw->GetId());
 787         event.m_keyCode = WXK_DELETE;
 788         event.SetEventObject(tw);
 789
 790         // Only if wxTextCtrl::OnChar is called
 791         // will this be set to True (and the character
 792         // passed through)
 793         cbs->doit = False;
 794
 795         tw->GetEventHandler()->ProcessEvent(event);
 796
 797         tw->m_tempCallbackStruct = NULL;
 798
 799         if (tw->InSetValue())
 800             return;
 801
 802         if (tw->m_processedDefault)
 803         {
 804             // Can generate a command
 805             wxCommandEvent commandEvent(wxEVT_COMMAND_TEXT_UPDATED, tw->GetId());
 806             commandEvent.SetEventObject(tw);
 807             tw->ProcessCommand(commandEvent);
 808         }
 809
 810         return;
 811     }
 812
 813     // Pasting operation: let it through without
 814     // calling OnChar
 815     if (cbs->text->length > 1)
 816         return;
 817
 818     // Something other than text
 819     if (cbs->text->ptr == NULL)
 820         return;
 821
 822     tw->m_tempCallbackStruct = (void*) cbs;
 823
 824     wxKeyEvent event (wxEVT_CHAR);
 825     event.SetId(tw->GetId());
 826     event.SetEventObject(tw);
 827     event.m_keyCode = (cbs->text->ptr[0] == 10 ? 13 : cbs->text->ptr[0]);
 828
 829     // Only if wxTextCtrl::OnChar is called
 830     // will this be set to True (and the character
 831     // passed through)
 832     cbs->doit = False;
 833
 834     tw->GetEventHandler()->ProcessEvent(event);
 835
 836     tw->m_tempCallbackStruct = NULL;
 837
 838     if (tw->InSetValue())
 839         return;
 840
 841     if (tw->m_processedDefault)
 842     {
 843         // Can generate a command
 844         wxCommandEvent commandEvent(wxEVT_COMMAND_TEXT_UPDATED, tw->GetId());
 845         commandEvent.SetEventObject(tw);
 846         tw->ProcessCommand(commandEvent);
 847     }
 848 }
 849
 850 static void
 851 wxTextWindowGainFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs)
 852 {
 853   if (!wxGetWindowFromTable(w))
 854     return;
 855
 856   wxTextCtrl *tw = (wxTextCtrl *) clientData;
 857   wxFocusEvent event(wxEVT_SET_FOCUS, tw->GetId());
 858   event.SetEventObject(tw);
 859   tw->GetEventHandler()->ProcessEvent(event);
 860 }
 861
 862 static void
 863 wxTextWindowLoseFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs)
 864 {
 865   if (!wxGetWindowFromTable(w))
 866     return;
 867
 868   wxTextCtrl *tw = (wxTextCtrl *) clientData;
 869   wxFocusEvent event(wxEVT_KILL_FOCUS, tw->GetId());
 870   event.SetEventObject(tw);
 871   tw->GetEventHandler()->ProcessEvent(event);
 872 }
 873
 874 static void wxTextWindowActivateProc(Widget w, XtPointer clientData,
 875                       XmAnyCallbackStruct *ptr)
 876 {
 877   if (!wxGetWindowFromTable(w))
 878     return;
 879
 880   wxTextCtrl *tw = (wxTextCtrl *) clientData;
 881   /*
 882   case XmCR_ACTIVATE:
 883     type_event = wxEVENT_TYPE_TEXT_ENTER_COMMAND ;
 884     break;
 885   default:
 886     type_event = wxEVENT_TYPE_TEXT_COMMAND ;
 887     break;
 888   }
 889   */
 890
 891   if (tw->InSetValue())
 892     return;
 893
 894   wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER);
 895   event.SetId(tw->GetId());
 896   event.SetEventObject(tw);
 897   tw->ProcessCommand(event);
 898 }