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 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "textctrl.h"
  22 #endif
  23
  24 #ifdef __VMS
  25 #define XtParent XTPARENT
  26 #endif
  27
  28 #include "wx/defs.h"
  29
  30 #include <sys/types.h>
  31 #include <sys/stat.h>
  32 #include <fstream.h>
  33 #include <ctype.h>
  34
  35 #include "wx/textctrl.h"
  36 #include "wx/settings.h"
  37 #include "wx/filefn.h"
  38 #include "wx/utils.h"
  39
  40 #ifdef __VMS__
  41 #pragma message disable nosimpint
  42 #endif
  43 #include <Xm/Text.h>
  44 #ifdef __VMS__
  45 #pragma message enable nosimpint
  46 #endif
  47
  48 #include "wx/motif/private.h"
  49
  50 // ----------------------------------------------------------------------------
  51 // private functions
  52 // ----------------------------------------------------------------------------
  53
  54 // helper: inserts the new text in the value of the text ctrl and returns the
  55 // result in place
  56 static void MergeChangesIntoString(wxString& value,
  57                                    XmTextVerifyCallbackStruct *textStruct);
  58
  59 // callbacks
  60 static void wxTextWindowChangedProc(Widget w, XtPointer clientData, XtPointer ptr);
  61 static void wxTextWindowModifyProc(Widget w, XtPointer clientData, XmTextVerifyCallbackStruct *cbs);
  62 static void wxTextWindowGainFocusProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs);
  63 static void wxTextWindowLoseFocusProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs);
  64 static void wxTextWindowActivateProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *ptr);
  65
  66     IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  67
  68     BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  69         EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  70         EVT_CHAR(wxTextCtrl::OnChar)
  71
  72     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
  73     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
  74     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
  75     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
  76     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
  77
  78     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
  79     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
  80     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
  81     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
  82     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
  83
  84     END_EVENT_TABLE()
  85
  86 // ============================================================================
  87 // implementation
  88 // ============================================================================
  89
  90 // ----------------------------------------------------------------------------
  91 // wxTextCtrl
  92 // ----------------------------------------------------------------------------
  93
  94 // Text item
  95 wxTextCtrl::wxTextCtrl()
  96 {
  97     m_tempCallbackStruct = (void*) NULL;
  98     m_modified = FALSE;
  99     m_processedDefault = FALSE;
 100 }
 101
 102 bool wxTextCtrl::Create(wxWindow *parent,
 103                         wxWindowID id,
 104                         const wxString& value,
 105                         const wxPoint& pos,
 106                         const wxSize& size,
 107                         long style,
 108                         const wxValidator& validator,
 109                         const wxString& name)
 110 {
 111     m_tempCallbackStruct = (void*) NULL;
 112     m_modified = FALSE;
 113     m_processedDefault = FALSE;
 114     //    m_backgroundColour = parent->GetBackgroundColour();
 115     m_backgroundColour = * wxWHITE;
 116     m_foregroundColour = parent->GetForegroundColour();
 117
 118     SetName(name);
 119     SetValidator(validator);
 120     if (parent)
 121         parent->AddChild(this);
 122
 123     m_windowStyle = style;
 124
 125     if ( id == -1 )
 126         m_windowId = (int)NewControlId();
 127     else
 128         m_windowId = id;
 129
 130     Widget parentWidget = (Widget) parent->GetClientWidget();
 131
 132     bool wantHorizScrolling = ((m_windowStyle & wxHSCROLL) != 0);
 133
 134     // If we don't have horizontal scrollbars, we want word wrap.
 135     bool wantWordWrap = !wantHorizScrolling;
 136
 137     if (m_windowStyle & wxTE_MULTILINE)
 138     {
 139         Arg args[2];
 140         XtSetArg (args[0], XmNscrollHorizontal, wantHorizScrolling ? True : False);
 141         XtSetArg (args[1], XmNwordWrap, wantWordWrap ? True : False);
 142
 143         m_mainWidget = (WXWidget) XmCreateScrolledText(parentWidget,
 144                                                        (char*)name.c_str(),
 145                                                        args, 2);
 146
 147         XtVaSetValues ((Widget) m_mainWidget,
 148                         XmNeditable, ((style & wxTE_READONLY) ? False : True),
 149                         XmNeditMode, XmMULTI_LINE_EDIT,
 150                         NULL);
 151         XtManageChild ((Widget) m_mainWidget);
 152     }
 153     else
 154     {
 155         m_mainWidget = (WXWidget)XtVaCreateManagedWidget
 156                                  (
 157                                   (char*)name.c_str(),
 158                                   xmTextWidgetClass,
 159                                   parentWidget,
 160                                   NULL
 161                                  );
 162
 163         XtVaSetValues ((Widget) m_mainWidget,
 164                         XmNeditable, ((style & wxTE_READONLY) ? False : True),
 165                         NULL);
 166
 167         // TODO: Is this relevant? What does it do?
 168         int noCols = 2;
 169         if (!value.IsNull() && (value.Length() > (unsigned int) noCols))
 170             noCols = value.Length();
 171         XtVaSetValues((Widget) m_mainWidget,
 172                       XmNcolumns, noCols,
 173                       NULL);
 174     }
 175
 176     // remove border if asked for
 177     if ( style & wxNO_BORDER )
 178     {
 179         XtVaSetValues((Widget)m_mainWidget,
 180                       XmNshadowThickness, 0,
 181                       NULL);
 182     }
 183
 184     if ( !!value )
 185     {
 186 #if 0
 187         // don't do this because it is just linking the text to a source
 188         // string which is unsafe. MB
 189         //
 190         XmTextSetString ((Widget) m_mainWidget, (char*)value.c_str());
 191 #else
 192         // do this instead... MB
 193         //
 194         XtVaSetValues( (Widget) m_mainWidget,
 195                        XmNvalue, (char *)value.c_str(),
 196                        NULL);
 197 #endif
 198     }
 199
 200     // install callbacks
 201     XtAddCallback((Widget) m_mainWidget, XmNvalueChangedCallback, (XtCallbackProc)wxTextWindowChangedProc, (XtPointer)this);
 202
 203     XtAddCallback((Widget) m_mainWidget, XmNmodifyVerifyCallback, (XtCallbackProc)wxTextWindowModifyProc, (XtPointer)this);
 204
 205     XtAddCallback((Widget) m_mainWidget, XmNactivateCallback, (XtCallbackProc)wxTextWindowActivateProc, (XtPointer)this);
 206
 207     XtAddCallback((Widget) m_mainWidget, XmNfocusCallback, (XtCallbackProc)wxTextWindowGainFocusProc, (XtPointer)this);
 208
 209     XtAddCallback((Widget) m_mainWidget, XmNlosingFocusCallback, (XtCallbackProc)wxTextWindowLoseFocusProc, (XtPointer)this);
 210
 211     // font
 212     m_font = parent->GetFont();
 213     ChangeFont(FALSE);
 214
 215     SetCanAddEventHandler(TRUE);
 216     AttachWidget (parent, m_mainWidget, (WXWidget) NULL, pos.x, pos.y, size.x, size.y);
 217
 218     ChangeBackgroundColour();
 219
 220     return TRUE;
 221 }
 222
 223 WXWidget wxTextCtrl::GetTopWidget() const
 224 {
 225     return ((m_windowStyle & wxTE_MULTILINE) ? (WXWidget) XtParent((Widget) m_mainWidget) : m_mainWidget);
 226 }
 227
 228 wxString wxTextCtrl::GetValue() const
 229 {
 230     wxString str; // result
 231
 232     if (m_windowStyle & wxTE_PASSWORD)
 233     {
 234         // the value is stored always in m_value because it can't be retrieved
 235         // from the text control
 236         str = m_value;
 237     }
 238     else
 239     {
 240         // just get the string from Motif
 241         char *s = XmTextGetString ((Widget) m_mainWidget);
 242         if ( s )
 243         {
 244             str = s;
 245             XtFree (s);
 246         }
 247         //else: return empty string
 248
 249         if ( m_tempCallbackStruct )
 250         {
 251             // the string in the control isn't yet updated, can't use it as is
 252             MergeChangesIntoString(str, (XmTextVerifyCallbackStruct *)
 253                                    m_tempCallbackStruct);
 254         }
 255     }
 256
 257     return str;
 258 }
 259
 260 void wxTextCtrl::SetValue(const wxString& value)
 261 {
 262     m_inSetValue = TRUE;
 263
 264 #if 0
 265     // don't do this because it is just linking the text to a source
 266     // string which is unsafe. MB
 267     //
 268     XmTextSetString ((Widget) m_mainWidget, (char*)value.c_str());
 269 #else
 270     // do this instead... MB
 271     //
 272     XtVaSetValues( (Widget) m_mainWidget,
 273                    XmNvalue, (char *)value.c_str(),
 274                    NULL);
 275 #endif
 276
 277     m_inSetValue = FALSE;
 278 }
 279
 280 // Clipboard operations
 281 void wxTextCtrl::Copy()
 282 {
 283     XmTextCopy((Widget) m_mainWidget, CurrentTime);
 284 }
 285
 286 void wxTextCtrl::Cut()
 287 {
 288     XmTextCut((Widget) m_mainWidget, CurrentTime);
 289 }
 290
 291 void wxTextCtrl::Paste()
 292 {
 293     XmTextPaste((Widget) m_mainWidget);
 294 }
 295
 296 bool wxTextCtrl::CanCopy() const
 297 {
 298     // Can copy if there's a selection
 299     long from, to;
 300     GetSelection(& from, & to);
 301     return (from != to) ;
 302 }
 303
 304 bool wxTextCtrl::CanCut() const
 305 {
 306     // Can cut if there's a selection
 307     long from, to;
 308     GetSelection(& from, & to);
 309     return (from != to) && (IsEditable());
 310 }
 311
 312 bool wxTextCtrl::CanPaste() const
 313 {
 314     return IsEditable() ;
 315 }
 316
 317 // Undo/redo
 318 void wxTextCtrl::Undo()
 319 {
 320     // Not possible in Motif
 321 }
 322
 323 void wxTextCtrl::Redo()
 324 {
 325     // Not possible in Motif
 326 }
 327
 328 bool wxTextCtrl::CanUndo() const
 329 {
 330     // No Undo in Motif
 331     return FALSE;
 332 }
 333
 334 bool wxTextCtrl::CanRedo() const
 335 {
 336     // No Redo in Motif
 337     return FALSE;
 338 }
 339
 340 // If the return values from and to are the same, there is no
 341 // selection.
 342 void wxTextCtrl::GetSelection(long* from, long* to) const
 343 {
 344     XmTextPosition left, right;
 345
 346     XmTextGetSelectionPosition((Widget) m_mainWidget, & left, & right);
 347
 348     *from = (long) left;
 349     *to = (long) right;
 350 }
 351
 352 bool wxTextCtrl::IsEditable() const
 353 {
 354     return (XmTextGetEditable((Widget) m_mainWidget) != 0);
 355 }
 356
 357 void wxTextCtrl::SetEditable(bool editable)
 358 {
 359     XmTextSetEditable((Widget) m_mainWidget, (Boolean) editable);
 360 }
 361
 362 void wxTextCtrl::SetInsertionPoint(long pos)
 363 {
 364     XmTextSetInsertionPosition ((Widget) m_mainWidget, (XmTextPosition) pos);
 365 }
 366
 367 void wxTextCtrl::SetInsertionPointEnd()
 368 {
 369     long pos = GetLastPosition();
 370     SetInsertionPoint(pos);
 371 }
 372
 373 long wxTextCtrl::GetInsertionPoint() const
 374 {
 375     return (long) XmTextGetInsertionPosition ((Widget) m_mainWidget);
 376 }
 377
 378 long wxTextCtrl::GetLastPosition() const
 379 {
 380     return (long) XmTextGetLastPosition ((Widget) m_mainWidget);
 381 }
 382
 383 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 384 {
 385     XmTextReplace ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 386         (char*) (const char*) value);
 387 }
 388
 389 void wxTextCtrl::Remove(long from, long to)
 390 {
 391     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 392                       (Time) 0);
 393     XmTextRemove ((Widget) m_mainWidget);
 394 }
 395
 396 void wxTextCtrl::SetSelection(long from, long to)
 397 {
 398     if( to == -1 )
 399         to = GetLastPosition();
 400
 401     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 402                       (Time) 0);
 403 }
 404
 405 bool wxTextCtrl::LoadFile(const wxString& file)
 406 {
 407     if (!wxFileExists(file))
 408         return FALSE;
 409
 410     m_fileName = file;
 411
 412     Clear();
 413
 414     Widget textWidget = (Widget) m_mainWidget;
 415     FILE *fp = 0;
 416
 417     struct stat statb;
 418     if ((stat ((char*) (const char*) file, &statb) == -1) || (statb.st_mode & S_IFMT) != S_IFREG ||
 419         !(fp = fopen ((char*) (const char*) file, "r")))
 420     {
 421         return FALSE;
 422     }
 423     else
 424     {
 425         long len = statb.st_size;
 426         char *text;
 427         if (!(text = XtMalloc ((unsigned) (len + 1))))
 428         {
 429             fclose (fp);
 430             return FALSE;
 431         }
 432         if (fread (text, sizeof (char), len, fp) != (size_t) len)
 433         {
 434         }
 435         fclose (fp);
 436
 437         text[len] = 0;
 438         XmTextSetString (textWidget, text);
 439         //      m_textPosition = len;
 440         XtFree (text);
 441         m_modified = FALSE;
 442         return TRUE;
 443     }
 444 }
 445
 446 // If file is null, try saved file name first
 447 // Returns TRUE if succeeds.
 448 bool wxTextCtrl::SaveFile(const wxString& file)
 449 {
 450     wxString theFile(file);
 451     if (theFile == "")
 452         theFile = m_fileName;
 453     if (theFile == "")
 454         return FALSE;
 455     m_fileName = theFile;
 456
 457     Widget textWidget = (Widget) m_mainWidget;
 458     FILE *fp;
 459
 460     if (!(fp = fopen ((char*) (const char*) theFile, "w")))
 461     {
 462         return FALSE;
 463     }
 464     else
 465     {
 466         char *text = XmTextGetString (textWidget);
 467         long len = XmTextGetLastPosition (textWidget);
 468
 469         if (fwrite (text, sizeof (char), len, fp) != (size_t) len)
 470         {
 471             // Did not write whole file
 472         }
 473         // Make sure newline terminates the file
 474         if (text[len - 1] != '\n')
 475             fputc ('\n', fp);
 476
 477         fclose (fp);
 478         XtFree (text);
 479         m_modified = FALSE;
 480         return TRUE;
 481     }
 482 }
 483
 484 void wxTextCtrl::WriteText(const wxString& text)
 485 {
 486     long textPosition = GetInsertionPoint() + strlen (text);
 487     XmTextInsert ((Widget) m_mainWidget, GetInsertionPoint(), (char*) (const char*) text);
 488     XtVaSetValues ((Widget) m_mainWidget, XmNcursorPosition, textPosition, NULL);
 489     SetInsertionPoint(textPosition);
 490     XmTextShowPosition ((Widget) m_mainWidget, textPosition);
 491     m_modified = TRUE;
 492 }
 493
 494 void wxTextCtrl::AppendText(const wxString& text)
 495 {
 496     long textPosition = GetLastPosition() + strlen(text);
 497     XmTextInsert ((Widget) m_mainWidget, GetLastPosition(), (char*) (const char*) text);
 498     XtVaSetValues ((Widget) m_mainWidget, XmNcursorPosition, textPosition, NULL);
 499     SetInsertionPoint(textPosition);
 500     XmTextShowPosition ((Widget) m_mainWidget, textPosition);
 501     m_modified = TRUE;
 502 }
 503
 504 void wxTextCtrl::Clear()
 505 {
 506     XmTextSetString ((Widget) m_mainWidget, "");
 507     m_modified = FALSE;
 508 }
 509
 510 bool wxTextCtrl::IsModified() const
 511 {
 512     return m_modified;
 513 }
 514
 515 // Makes 'unmodified'
 516 void wxTextCtrl::DiscardEdits()
 517 {
 518     m_modified = FALSE;
 519 }
 520
 521 int wxTextCtrl::GetNumberOfLines() const
 522 {
 523     // HIDEOUSLY inefficient, but we have no choice.
 524     char *s = XmTextGetString ((Widget) m_mainWidget);
 525     if (s)
 526     {
 527         long i = 0;
 528         int currentLine = 0;
 529         bool finished = FALSE;
 530         while (!finished)
 531         {
 532             int ch = s[i];
 533             if (ch == '\n')
 534             {
 535                 currentLine++;
 536                 i++;
 537             }
 538             else if (ch == 0)
 539             {
 540                 finished = TRUE;
 541             }
 542             else
 543                 i++;
 544         }
 545
 546         XtFree (s);
 547         return currentLine;
 548     }
 549     return 0;
 550 }
 551
 552 long wxTextCtrl::XYToPosition(long x, long y) const
 553 {
 554 /* It seems, that there is a bug in some versions of the Motif library,
 555     so the original wxWin-Code doesn't work. */
 556     /*
 557     Widget textWidget = (Widget) handle;
 558     return (long) XmTextXYToPos (textWidget, (Position) x, (Position) y);
 559     */
 560     /* Now a little workaround: */
 561     long r=0;
 562     for (int i=0; i<y; i++) r+=(GetLineLength(i)+1);
 563     return r+x;
 564 }
 565
 566 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 567 {
 568     Position xx, yy;
 569     XmTextPosToXY((Widget) m_mainWidget, pos, &xx, &yy);
 570     if ( x )
 571         *x = xx;
 572     if ( y )
 573         *y = yy;
 574
 575     return TRUE;
 576 }
 577
 578 void wxTextCtrl::ShowPosition(long pos)
 579 {
 580     XmTextShowPosition ((Widget) m_mainWidget, (XmTextPosition) pos);
 581 }
 582
 583 int wxTextCtrl::GetLineLength(long lineNo) const
 584 {
 585     wxString str = GetLineText (lineNo);
 586     return (int) str.Length();
 587 }
 588
 589 wxString wxTextCtrl::GetLineText(long lineNo) const
 590 {
 591     // HIDEOUSLY inefficient, but we have no choice.
 592     char *s = XmTextGetString ((Widget) m_mainWidget);
 593
 594     if (s)
 595     {
 596         wxString buf("");
 597         long i;
 598         int currentLine = 0;
 599         for (i = 0; currentLine != lineNo && s[i]; i++ )
 600             if (s[i] == '\n')
 601                 currentLine++;
 602             // Now get the text
 603             int j;
 604             for (j = 0; s[i] && s[i] != '\n'; i++, j++ )
 605                 buf += s[i];
 606
 607             XtFree(s);
 608             return buf;
 609     }
 610     else
 611         return wxEmptyString;
 612 }
 613
 614 /*
 615 * Text item
 616 */
 617
 618 void wxTextCtrl::Command(wxCommandEvent & event)
 619 {
 620     SetValue (event.GetString());
 621     ProcessCommand (event);
 622 }
 623
 624 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 625 {
 626     // By default, load the first file into the text window.
 627     if (event.GetNumberOfFiles() > 0)
 628     {
 629         LoadFile(event.GetFiles()[0]);
 630     }
 631 }
 632
 633 void wxTextCtrl::OnChar(wxKeyEvent& event)
 634 {
 635     // Indicates that we should generate a normal command, because
 636     // we're letting default behaviour happen (otherwise it's vetoed
 637     // by virtue of overriding OnChar)
 638     m_processedDefault = TRUE;
 639
 640     if (m_tempCallbackStruct)
 641     {
 642         XmTextVerifyCallbackStruct *textStruct =
 643             (XmTextVerifyCallbackStruct *) m_tempCallbackStruct;
 644         textStruct->doit = True;
 645         if (isascii(event.m_keyCode) && (textStruct->text->length == 1))
 646         {
 647             textStruct->text->ptr[0] = ((event.m_keyCode == WXK_RETURN) ? 10 : event.m_keyCode);
 648         }
 649     }
 650 }
 651
 652 void wxTextCtrl::ChangeFont(bool keepOriginalSize)
 653 {
 654     wxWindow::ChangeFont(keepOriginalSize);
 655 }
 656
 657 void wxTextCtrl::ChangeBackgroundColour()
 658 {
 659     wxWindow::ChangeBackgroundColour();
 660
 661     /* TODO: should scrollbars be affected? Should probably have separate
 662     * function to change them (by default, taken from wxSystemSettings)
 663     */
 664     if (m_windowStyle & wxTE_MULTILINE)
 665     {
 666         Widget parent = XtParent ((Widget) m_mainWidget);
 667         Widget hsb, vsb;
 668
 669         XtVaGetValues (parent,
 670             XmNhorizontalScrollBar, &hsb,
 671             XmNverticalScrollBar, &vsb,
 672             NULL);
 673         wxColour backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
 674         if (hsb)
 675             DoChangeBackgroundColour((WXWidget) hsb, backgroundColour, TRUE);
 676         if (vsb)
 677             DoChangeBackgroundColour((WXWidget) vsb, backgroundColour, TRUE);
 678
 679         DoChangeBackgroundColour((WXWidget) parent, m_backgroundColour, TRUE);
 680     }
 681 }
 682
 683 void wxTextCtrl::ChangeForegroundColour()
 684 {
 685     wxWindow::ChangeForegroundColour();
 686
 687     if (m_windowStyle & wxTE_MULTILINE)
 688     {
 689         Widget parent = XtParent ((Widget) m_mainWidget);
 690         Widget hsb, vsb;
 691
 692         XtVaGetValues (parent,
 693             XmNhorizontalScrollBar, &hsb,
 694             XmNverticalScrollBar, &vsb,
 695             NULL);
 696
 697             /* TODO: should scrollbars be affected? Should probably have separate
 698             * function to change them (by default, taken from wxSystemSettings)
 699             if (hsb)
 700             DoChangeForegroundColour((WXWidget) hsb, m_foregroundColour);
 701             if (vsb)
 702             DoChangeForegroundColour((WXWidget) vsb, m_foregroundColour);
 703         */
 704         DoChangeForegroundColour((WXWidget) parent, m_foregroundColour);
 705     }
 706 }
 707
 708 void wxTextCtrl::DoSendEvents(void *wxcbs, long keycode)
 709 {
 710     // we're in process of updating the text control
 711     m_tempCallbackStruct = wxcbs;
 712
 713     XmTextVerifyCallbackStruct *cbs = (XmTextVerifyCallbackStruct *)wxcbs;
 714
 715     wxKeyEvent event (wxEVT_CHAR);
 716     event.SetId(GetId());
 717     event.m_keyCode = keycode;
 718     event.SetEventObject(this);
 719
 720     // Only if wxTextCtrl::OnChar is called will this be set to True (and
 721     // the character passed through)
 722     cbs->doit = False;
 723
 724     GetEventHandler()->ProcessEvent(event);
 725
 726     if ( !InSetValue() && m_processedDefault )
 727     {
 728         // Can generate a command
 729         wxCommandEvent commandEvent(wxEVT_COMMAND_TEXT_UPDATED, GetId());
 730         commandEvent.SetEventObject(this);
 731         ProcessCommand(commandEvent);
 732     }
 733
 734     // do it after the (user) event handlers processed the events because
 735     // otherwise GetValue() would return incorrect (not yet updated value)
 736     m_tempCallbackStruct = NULL;
 737 }
 738
 739 // ----------------------------------------------------------------------------
 740 // helpers and Motif callbacks
 741 // ----------------------------------------------------------------------------
 742
 743 static void MergeChangesIntoString(wxString& value,
 744                                    XmTextVerifyCallbackStruct *cbs)
 745 {
 746     /* _sm_
 747      * At least on my system (SunOS 4.1.3 + Motif 1.2), you need to think of
 748      * every event as a replace event.  cbs->text->ptr gives the replacement
 749      * text, cbs->startPos gives the index of the first char affected by the
 750      * replace, and cbs->endPos gives the index one more than the last char
 751      * affected by the replace (startPos == endPos implies an empty range).
 752      * Hence, a deletion is represented by replacing all input text with a
 753      * blank string ("", *not* NULL!).  A simple insertion that does not
 754      * overwrite any text has startPos == endPos.
 755      */
 756
 757     if ( !value )
 758     {
 759         // easy case: the ol value was empty
 760         value = cbs->text->ptr;
 761     }
 762     else
 763     {
 764         // merge the changes into the value
 765         const char * const passwd = value;
 766         int len = value.length();
 767
 768         len += ( cbs->text->ptr ?
 769                  strlen(cbs->text->ptr) :
 770                  0 ) + 1;                      // + new text (if any) + NUL
 771         len -= cbs->endPos - cbs->startPos;    // - text from affected region.
 772
 773         char * newS = new char [len];
 774         char * dest = newS,
 775              * insert = cbs->text->ptr;
 776
 777         // Copy (old) text from passwd, up to the start posn of the change.
 778         int i;
 779         const char * p = passwd;
 780         for (i = 0; i < cbs->startPos; ++i)
 781             *dest++ = *p++;
 782
 783         // Copy the text to be inserted).
 784         if (insert)
 785             while (*insert)
 786                 *dest++ = *insert++;
 787
 788         // Finally, copy into newS any remaining text from passwd[endPos] on.
 789         for (p = passwd + cbs->endPos; *p; )
 790             *dest++ = *p++;
 791         *dest = 0;
 792
 793         value = newS;
 794
 795         delete[] newS;
 796     }
 797 }
 798
 799 static void
 800 wxTextWindowChangedProc (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 801 {
 802     if (!wxGetWindowFromTable(w))
 803         // Widget has been deleted!
 804         return;
 805
 806     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 807     tw->SetModified(TRUE);
 808 }
 809
 810 static void
 811 wxTextWindowModifyProc (Widget WXUNUSED(w), XtPointer clientData, XmTextVerifyCallbackStruct *cbs)
 812 {
 813     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 814     tw->m_processedDefault = FALSE;
 815
 816     // First, do some stuff if it's a password control: in this case, we need
 817     // to store the string inside the class because GetValue() can't retrieve
 818     // it from the text ctrl. We do *not* do it in other circumstances because
 819     // it would double the amount of memory needed.
 820
 821     if ( tw->GetWindowStyleFlag() & wxTE_PASSWORD )
 822     {
 823         MergeChangesIntoString(tw->m_value, cbs);
 824
 825         if ( cbs->text->length > 0 )
 826         {
 827             int i;
 828             for (i = 0; i < cbs->text->length; ++i)
 829                 cbs->text->ptr[i] = '*';
 830             cbs->text->ptr[i] = '\0';
 831         }
 832     }
 833
 834     // If we're already within an OnChar, return: probably a programmatic
 835     // insertion.
 836     if (tw->m_tempCallbackStruct)
 837         return;
 838
 839     // Check for a backspace
 840     if (cbs->startPos == (cbs->currInsert - 1))
 841     {
 842         tw->DoSendEvents((void *)cbs, WXK_DELETE);
 843
 844         return;
 845     }
 846
 847     // Pasting operation: let it through without calling OnChar
 848     if (cbs->text->length > 1)
 849         return;
 850
 851     // Something other than text
 852     if (cbs->text->ptr == NULL)
 853         return;
 854
 855     // normal key press
 856     char ch = cbs->text->ptr[0];
 857     tw->DoSendEvents((void *)cbs, ch == '\n' ? '\r' : ch);
 858 }
 859
 860 static void
 861 wxTextWindowGainFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 862 {
 863     if (!wxGetWindowFromTable(w))
 864         return;
 865
 866     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 867     wxFocusEvent event(wxEVT_SET_FOCUS, tw->GetId());
 868     event.SetEventObject(tw);
 869     tw->GetEventHandler()->ProcessEvent(event);
 870 }
 871
 872 static void
 873 wxTextWindowLoseFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 874 {
 875     if (!wxGetWindowFromTable(w))
 876         return;
 877
 878     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 879     wxFocusEvent event(wxEVT_KILL_FOCUS, tw->GetId());
 880     event.SetEventObject(tw);
 881     tw->GetEventHandler()->ProcessEvent(event);
 882 }
 883
 884 static void wxTextWindowActivateProc(Widget w, XtPointer clientData,
 885                                      XmAnyCallbackStruct *WXUNUSED(ptr))
 886 {
 887     if (!wxGetWindowFromTable(w))
 888         return;
 889
 890     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 891
 892     if (tw->InSetValue())
 893         return;
 894
 895     wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER);
 896     event.SetId(tw->GetId());
 897     event.SetEventObject(tw);
 898     tw->ProcessCommand(event);
 899 }
 900
 901 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
 902 {
 903     Cut();
 904 }
 905
 906 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
 907 {
 908     Copy();
 909 }
 910
 911 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
 912 {
 913     Paste();
 914 }
 915
 916 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
 917 {
 918     Undo();
 919 }
 920
 921 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
 922 {
 923     Redo();
 924 }
 925
 926 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
 927 {
 928     event.Enable( CanCut() );
 929 }
 930
 931 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
 932 {
 933     event.Enable( CanCopy() );
 934 }
 935
 936 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
 937 {
 938     event.Enable( CanPaste() );
 939 }
 940
 941 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
 942 {
 943     event.Enable( CanUndo() );
 944 }
 945
 946 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
 947 {
 948     event.Enable( CanRedo() );
 949 }