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