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