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