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