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     if( !CreateControl( parent, id, pos, size, style, validator, name ) )
 111         return false;
 112
 113     m_tempCallbackStruct = (void*) NULL;
 114     m_modified = FALSE;
 115     m_processedDefault = FALSE;
 116
 117     m_backgroundColour = *wxWHITE;
 118
 119     Widget parentWidget = (Widget) parent->GetClientWidget();
 120
 121     bool wantHorizScrolling = ((m_windowStyle & wxHSCROLL) != 0);
 122
 123     // If we don't have horizontal scrollbars, we want word wrap.
 124     bool wantWordWrap = !wantHorizScrolling;
 125
 126     if (m_windowStyle & wxTE_MULTILINE)
 127     {
 128         Arg args[2];
 129         XtSetArg (args[0], XmNscrollHorizontal, wantHorizScrolling ? True : False);
 130         XtSetArg (args[1], XmNwordWrap, wantWordWrap ? True : False);
 131
 132         m_mainWidget = (WXWidget) XmCreateScrolledText(parentWidget,
 133                                                        (char*)name.c_str(),
 134                                                        args, 2);
 135
 136         XtVaSetValues ((Widget) m_mainWidget,
 137                         XmNeditable, ((style & wxTE_READONLY) ? False : True),
 138                         XmNeditMode, XmMULTI_LINE_EDIT,
 139                         NULL);
 140         XtManageChild ((Widget) m_mainWidget);
 141     }
 142     else
 143     {
 144         m_mainWidget = (WXWidget)XtVaCreateManagedWidget
 145                                  (
 146                                   (char*)name.c_str(),
 147                                   xmTextWidgetClass,
 148                                   parentWidget,
 149                                   NULL
 150                                  );
 151
 152         XtVaSetValues ((Widget) m_mainWidget,
 153                         XmNeditable, ((style & wxTE_READONLY) ? False : True),
 154                         NULL);
 155
 156         // TODO: Is this relevant? What does it do?
 157         int noCols = 2;
 158         if (!value.IsNull() && (value.Length() > (unsigned int) noCols))
 159             noCols = value.Length();
 160         XtVaSetValues((Widget) m_mainWidget,
 161                       XmNcolumns, noCols,
 162                       NULL);
 163     }
 164
 165     // remove border if asked for
 166     if ( style & wxNO_BORDER )
 167     {
 168         XtVaSetValues((Widget)m_mainWidget,
 169                       XmNshadowThickness, 0,
 170                       NULL);
 171     }
 172
 173     if ( !value.empty() )
 174     {
 175         // do this instead... MB
 176         //
 177         XtVaSetValues( (Widget) m_mainWidget,
 178                        XmNvalue, (char *)value.c_str(),
 179                        NULL);
 180     }
 181
 182     // install callbacks
 183     XtAddCallback((Widget) m_mainWidget, XmNvalueChangedCallback, (XtCallbackProc)wxTextWindowChangedProc, (XtPointer)this);
 184
 185     XtAddCallback((Widget) m_mainWidget, XmNmodifyVerifyCallback, (XtCallbackProc)wxTextWindowModifyProc, (XtPointer)this);
 186
 187     XtAddCallback((Widget) m_mainWidget, XmNactivateCallback, (XtCallbackProc)wxTextWindowActivateProc, (XtPointer)this);
 188
 189     XtAddCallback((Widget) m_mainWidget, XmNfocusCallback, (XtCallbackProc)wxTextWindowGainFocusProc, (XtPointer)this);
 190
 191     XtAddCallback((Widget) m_mainWidget, XmNlosingFocusCallback, (XtCallbackProc)wxTextWindowLoseFocusProc, (XtPointer)this);
 192
 193     // font
 194     ChangeFont(FALSE);
 195
 196     wxSize best = GetBestSize();
 197     if( size.x != -1 ) best.x = size.x;
 198     if( size.y != -1 ) best.y = size.y;
 199
 200     SetCanAddEventHandler(TRUE);
 201     AttachWidget (parent, m_mainWidget, (WXWidget) NULL,
 202                   pos.x, pos.y, best.x, best.y);
 203
 204     ChangeBackgroundColour();
 205
 206     return TRUE;
 207 }
 208
 209 WXWidget wxTextCtrl::GetTopWidget() const
 210 {
 211     return ((m_windowStyle & wxTE_MULTILINE) ? (WXWidget) XtParent((Widget) m_mainWidget) : m_mainWidget);
 212 }
 213
 214 wxString wxTextCtrl::GetValue() const
 215 {
 216     wxString str; // result
 217
 218     if (m_windowStyle & wxTE_PASSWORD)
 219     {
 220         // the value is stored always in m_value because it can't be retrieved
 221         // from the text control
 222         str = m_value;
 223     }
 224     else
 225     {
 226         // just get the string from Motif
 227         char *s = XmTextGetString ((Widget) m_mainWidget);
 228         if ( s )
 229         {
 230             str = s;
 231             XtFree (s);
 232         }
 233         //else: return empty string
 234
 235         if ( m_tempCallbackStruct )
 236         {
 237             // the string in the control isn't yet updated, can't use it as is
 238             MergeChangesIntoString(str, (XmTextVerifyCallbackStruct *)
 239                                    m_tempCallbackStruct);
 240         }
 241     }
 242
 243     return str;
 244 }
 245
 246 void wxTextCtrl::SetValue(const wxString& value)
 247 {
 248     m_inSetValue = TRUE;
 249
 250     // do this instead... MB
 251     //
 252     XtVaSetValues( (Widget) m_mainWidget,
 253                    XmNvalue, (char *)value.c_str(),
 254                    NULL);
 255
 256     m_inSetValue = FALSE;
 257 }
 258
 259 // Clipboard operations
 260 void wxTextCtrl::Copy()
 261 {
 262     XmTextCopy((Widget) m_mainWidget, CurrentTime);
 263 }
 264
 265 void wxTextCtrl::Cut()
 266 {
 267     XmTextCut((Widget) m_mainWidget, CurrentTime);
 268 }
 269
 270 void wxTextCtrl::Paste()
 271 {
 272     XmTextPaste((Widget) m_mainWidget);
 273 }
 274
 275 bool wxTextCtrl::CanCopy() const
 276 {
 277     // Can copy if there's a selection
 278     long from, to;
 279     GetSelection(& from, & to);
 280     return (from != to) ;
 281 }
 282
 283 bool wxTextCtrl::CanCut() const
 284 {
 285     // Can cut if there's a selection
 286     long from, to;
 287     GetSelection(& from, & to);
 288     return (from != to) && (IsEditable());
 289 }
 290
 291 bool wxTextCtrl::CanPaste() const
 292 {
 293     return IsEditable() ;
 294 }
 295
 296 // Undo/redo
 297 void wxTextCtrl::Undo()
 298 {
 299     // Not possible in Motif
 300 }
 301
 302 void wxTextCtrl::Redo()
 303 {
 304     // Not possible in Motif
 305 }
 306
 307 bool wxTextCtrl::CanUndo() const
 308 {
 309     // No Undo in Motif
 310     return FALSE;
 311 }
 312
 313 bool wxTextCtrl::CanRedo() const
 314 {
 315     // No Redo in Motif
 316     return FALSE;
 317 }
 318
 319 // If the return values from and to are the same, there is no
 320 // selection.
 321 void wxTextCtrl::GetSelection(long* from, long* to) const
 322 {
 323     XmTextPosition left, right;
 324
 325     XmTextGetSelectionPosition((Widget) m_mainWidget, & left, & right);
 326
 327     *from = (long) left;
 328     *to = (long) right;
 329 }
 330
 331 bool wxTextCtrl::IsEditable() const
 332 {
 333     return (XmTextGetEditable((Widget) m_mainWidget) != 0);
 334 }
 335
 336 void wxTextCtrl::SetEditable(bool editable)
 337 {
 338     XmTextSetEditable((Widget) m_mainWidget, (Boolean) editable);
 339 }
 340
 341 void wxTextCtrl::SetInsertionPoint(long pos)
 342 {
 343     XmTextSetInsertionPosition ((Widget) m_mainWidget, (XmTextPosition) pos);
 344 }
 345
 346 void wxTextCtrl::SetInsertionPointEnd()
 347 {
 348     long pos = GetLastPosition();
 349     SetInsertionPoint(pos);
 350 }
 351
 352 long wxTextCtrl::GetInsertionPoint() const
 353 {
 354     return (long) XmTextGetInsertionPosition ((Widget) m_mainWidget);
 355 }
 356
 357 long wxTextCtrl::GetLastPosition() const
 358 {
 359     return (long) XmTextGetLastPosition ((Widget) m_mainWidget);
 360 }
 361
 362 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 363 {
 364     XmTextReplace ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 365         (char*) (const char*) value);
 366 }
 367
 368 void wxTextCtrl::Remove(long from, long to)
 369 {
 370     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 371                       (Time) 0);
 372     XmTextRemove ((Widget) m_mainWidget);
 373 }
 374
 375 void wxTextCtrl::SetSelection(long from, long to)
 376 {
 377     if( to == -1 )
 378         to = GetLastPosition();
 379
 380     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 381                       (Time) 0);
 382 }
 383
 384 bool wxTextCtrl::LoadFile(const wxString& file)
 385 {
 386     if (!wxFileExists(file))
 387         return FALSE;
 388
 389     m_fileName = file;
 390
 391     Clear();
 392
 393     Widget textWidget = (Widget) m_mainWidget;
 394     FILE *fp = 0;
 395
 396     struct stat statb;
 397     if ((stat ((char*) (const char*) file, &statb) == -1) || (statb.st_mode & S_IFMT) != S_IFREG ||
 398         !(fp = fopen ((char*) (const char*) file, "r")))
 399     {
 400         return FALSE;
 401     }
 402     else
 403     {
 404         long len = statb.st_size;
 405         char *text;
 406         if (!(text = XtMalloc ((unsigned) (len + 1))))
 407         {
 408             fclose (fp);
 409             return FALSE;
 410         }
 411         if (fread (text, sizeof (char), len, fp) != (size_t) len)
 412         {
 413         }
 414         fclose (fp);
 415
 416         text[len] = 0;
 417         XmTextSetString (textWidget, text);
 418         //      m_textPosition = len;
 419         XtFree (text);
 420         m_modified = FALSE;
 421         return TRUE;
 422     }
 423 }
 424
 425 // If file is null, try saved file name first
 426 // Returns TRUE if succeeds.
 427 bool wxTextCtrl::SaveFile(const wxString& file)
 428 {
 429     wxString theFile(file);
 430     if (theFile == "")
 431         theFile = m_fileName;
 432     if (theFile == "")
 433         return FALSE;
 434     m_fileName = theFile;
 435
 436     Widget textWidget = (Widget) m_mainWidget;
 437     FILE *fp;
 438
 439     if (!(fp = fopen ((char*) (const char*) theFile, "w")))
 440     {
 441         return FALSE;
 442     }
 443     else
 444     {
 445         char *text = XmTextGetString (textWidget);
 446         long len = XmTextGetLastPosition (textWidget);
 447
 448         if (fwrite (text, sizeof (char), len, fp) != (size_t) len)
 449         {
 450             // Did not write whole file
 451         }
 452         // Make sure newline terminates the file
 453         if (text[len - 1] != '\n')
 454             fputc ('\n', fp);
 455
 456         fclose (fp);
 457         XtFree (text);
 458         m_modified = FALSE;
 459         return TRUE;
 460     }
 461 }
 462
 463 void wxTextCtrl::WriteText(const wxString& text)
 464 {
 465     long textPosition = GetInsertionPoint() + strlen (text);
 466     XmTextInsert ((Widget) m_mainWidget, GetInsertionPoint(), (char*) (const char*) text);
 467     XtVaSetValues ((Widget) m_mainWidget, XmNcursorPosition, textPosition, NULL);
 468     SetInsertionPoint(textPosition);
 469     XmTextShowPosition ((Widget) m_mainWidget, textPosition);
 470     m_modified = TRUE;
 471 }
 472
 473 void wxTextCtrl::AppendText(const wxString& text)
 474 {
 475     long textPosition = GetLastPosition() + strlen(text);
 476     XmTextInsert ((Widget) m_mainWidget, GetLastPosition(), (char*) (const char*) text);
 477     XtVaSetValues ((Widget) m_mainWidget, XmNcursorPosition, textPosition, NULL);
 478     SetInsertionPoint(textPosition);
 479     XmTextShowPosition ((Widget) m_mainWidget, textPosition);
 480     m_modified = TRUE;
 481 }
 482
 483 void wxTextCtrl::Clear()
 484 {
 485     XmTextSetString ((Widget) m_mainWidget, "");
 486     m_modified = FALSE;
 487 }
 488
 489 bool wxTextCtrl::IsModified() const
 490 {
 491     return m_modified;
 492 }
 493
 494 // Makes 'unmodified'
 495 void wxTextCtrl::DiscardEdits()
 496 {
 497     m_modified = FALSE;
 498 }
 499
 500 int wxTextCtrl::GetNumberOfLines() const
 501 {
 502     // HIDEOUSLY inefficient, but we have no choice.
 503     char *s = XmTextGetString ((Widget) m_mainWidget);
 504     if (s)
 505     {
 506         long i = 0;
 507         int currentLine = 0;
 508         bool finished = FALSE;
 509         while (!finished)
 510         {
 511             int ch = s[i];
 512             if (ch == '\n')
 513             {
 514                 currentLine++;
 515                 i++;
 516             }
 517             else if (ch == 0)
 518             {
 519                 finished = TRUE;
 520             }
 521             else
 522                 i++;
 523         }
 524
 525         XtFree (s);
 526         return currentLine;
 527     }
 528     return 0;
 529 }
 530
 531 long wxTextCtrl::XYToPosition(long x, long y) const
 532 {
 533 /* It seems, that there is a bug in some versions of the Motif library,
 534     so the original wxWin-Code doesn't work. */
 535     /*
 536     Widget textWidget = (Widget) handle;
 537     return (long) XmTextXYToPos (textWidget, (Position) x, (Position) y);
 538     */
 539     /* Now a little workaround: */
 540     long r=0;
 541     for (int i=0; i<y; i++) r+=(GetLineLength(i)+1);
 542     return r+x;
 543 }
 544
 545 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 546 {
 547     Position xx, yy;
 548     XmTextPosToXY((Widget) m_mainWidget, pos, &xx, &yy);
 549     if ( x )
 550         *x = xx;
 551     if ( y )
 552         *y = yy;
 553
 554     return TRUE;
 555 }
 556
 557 void wxTextCtrl::ShowPosition(long pos)
 558 {
 559     XmTextShowPosition ((Widget) m_mainWidget, (XmTextPosition) pos);
 560 }
 561
 562 int wxTextCtrl::GetLineLength(long lineNo) const
 563 {
 564     wxString str = GetLineText (lineNo);
 565     return (int) str.Length();
 566 }
 567
 568 wxString wxTextCtrl::GetLineText(long lineNo) const
 569 {
 570     // HIDEOUSLY inefficient, but we have no choice.
 571     char *s = XmTextGetString ((Widget) m_mainWidget);
 572
 573     if (s)
 574     {
 575         wxString buf("");
 576         long i;
 577         int currentLine = 0;
 578         for (i = 0; currentLine != lineNo && s[i]; i++ )
 579             if (s[i] == '\n')
 580                 currentLine++;
 581             // Now get the text
 582             int j;
 583             for (j = 0; s[i] && s[i] != '\n'; i++, j++ )
 584                 buf += s[i];
 585
 586             XtFree(s);
 587             return buf;
 588     }
 589     else
 590         return wxEmptyString;
 591 }
 592
 593 /*
 594 * Text item
 595 */
 596
 597 void wxTextCtrl::Command(wxCommandEvent & event)
 598 {
 599     SetValue (event.GetString());
 600     ProcessCommand (event);
 601 }
 602
 603 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 604 {
 605     // By default, load the first file into the text window.
 606     if (event.GetNumberOfFiles() > 0)
 607     {
 608         LoadFile(event.GetFiles()[0]);
 609     }
 610 }
 611
 612 void wxTextCtrl::OnChar(wxKeyEvent& event)
 613 {
 614     // Indicates that we should generate a normal command, because
 615     // we're letting default behaviour happen (otherwise it's vetoed
 616     // by virtue of overriding OnChar)
 617     m_processedDefault = TRUE;
 618
 619     if (m_tempCallbackStruct)
 620     {
 621         XmTextVerifyCallbackStruct *textStruct =
 622             (XmTextVerifyCallbackStruct *) m_tempCallbackStruct;
 623         textStruct->doit = True;
 624         if (isascii(event.m_keyCode) && (textStruct->text->length == 1))
 625         {
 626             textStruct->text->ptr[0] = ((event.m_keyCode == WXK_RETURN) ? 10 : event.m_keyCode);
 627         }
 628     }
 629 }
 630
 631 void wxTextCtrl::ChangeFont(bool keepOriginalSize)
 632 {
 633     wxWindow::ChangeFont(keepOriginalSize);
 634 }
 635
 636 void wxTextCtrl::ChangeBackgroundColour()
 637 {
 638     wxWindow::ChangeBackgroundColour();
 639
 640     /* TODO: should scrollbars be affected? Should probably have separate
 641     * function to change them (by default, taken from wxSystemSettings)
 642     */
 643     if (m_windowStyle & wxTE_MULTILINE)
 644     {
 645         Widget parent = XtParent ((Widget) m_mainWidget);
 646         Widget hsb, vsb;
 647
 648         XtVaGetValues (parent,
 649             XmNhorizontalScrollBar, &hsb,
 650             XmNverticalScrollBar, &vsb,
 651             NULL);
 652         wxColour backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
 653         if (hsb)
 654             DoChangeBackgroundColour((WXWidget) hsb, backgroundColour, TRUE);
 655         if (vsb)
 656             DoChangeBackgroundColour((WXWidget) vsb, backgroundColour, TRUE);
 657
 658         // MBN: why change parent background?
 659         // DoChangeBackgroundColour((WXWidget) parent, m_backgroundColour, TRUE);
 660     }
 661 }
 662
 663 void wxTextCtrl::ChangeForegroundColour()
 664 {
 665     wxWindow::ChangeForegroundColour();
 666
 667     if (m_windowStyle & wxTE_MULTILINE)
 668     {
 669         Widget parent = XtParent ((Widget) m_mainWidget);
 670         Widget hsb, vsb;
 671
 672         XtVaGetValues (parent,
 673             XmNhorizontalScrollBar, &hsb,
 674             XmNverticalScrollBar, &vsb,
 675             NULL);
 676
 677             /* TODO: should scrollbars be affected? Should probably have separate
 678             * function to change them (by default, taken from wxSystemSettings)
 679             if (hsb)
 680             DoChangeForegroundColour((WXWidget) hsb, m_foregroundColour);
 681             if (vsb)
 682             DoChangeForegroundColour((WXWidget) vsb, m_foregroundColour);
 683         */
 684         DoChangeForegroundColour((WXWidget) parent, m_foregroundColour);
 685     }
 686 }
 687
 688 void wxTextCtrl::DoSendEvents(void *wxcbs, long keycode)
 689 {
 690     // we're in process of updating the text control
 691     m_tempCallbackStruct = wxcbs;
 692
 693     XmTextVerifyCallbackStruct *cbs = (XmTextVerifyCallbackStruct *)wxcbs;
 694
 695     wxKeyEvent event (wxEVT_CHAR);
 696     event.SetId(GetId());
 697     event.m_keyCode = keycode;
 698     event.SetEventObject(this);
 699
 700     // Only if wxTextCtrl::OnChar is called will this be set to True (and
 701     // the character passed through)
 702     cbs->doit = False;
 703
 704     GetEventHandler()->ProcessEvent(event);
 705
 706     if ( !InSetValue() && m_processedDefault )
 707     {
 708         // Can generate a command
 709         wxCommandEvent commandEvent(wxEVT_COMMAND_TEXT_UPDATED, GetId());
 710         commandEvent.SetEventObject(this);
 711         ProcessCommand(commandEvent);
 712     }
 713
 714     // do it after the (user) event handlers processed the events because
 715     // otherwise GetValue() would return incorrect (not yet updated value)
 716     m_tempCallbackStruct = NULL;
 717 }
 718
 719 wxSize wxDoGetSingleTextCtrlBestSize( Widget textWidget,
 720                                       const wxWindow* window )
 721 {
 722     Dimension xmargin, ymargin, highlight, shadow;
 723     char* value;
 724
 725     XtVaGetValues( textWidget,
 726                    XmNmarginWidth, &xmargin,
 727                    XmNmarginHeight, &ymargin,
 728                    XmNvalue, &value,
 729                    XmNhighlightThickness, &highlight,
 730                    XmNshadowThickness, &shadow,
 731                    NULL );
 732
 733     if( !value )
 734         value = "|";
 735
 736     int x, y;
 737     window->GetTextExtent( value, &x, &y );
 738
 739     if( x < 100 ) x = 100;
 740
 741     return wxSize( x + 2 * xmargin + 2 * highlight + 2 * shadow,
 742                    // MBN: +2 necessary: Lesstif bug or mine?
 743                    y + 2 * ymargin + 2 * highlight + 2 * shadow + 2 );
 744 }
 745
 746 wxSize wxTextCtrl::DoGetBestSize() const
 747 {
 748     if( IsSingleLine() )
 749         return wxDoGetSingleTextCtrlBestSize( (Widget)m_mainWidget, this );
 750     else
 751         return wxWindow::DoGetBestSize();
 752 }
 753
 754 // ----------------------------------------------------------------------------
 755 // helpers and Motif callbacks
 756 // ----------------------------------------------------------------------------
 757
 758 static void MergeChangesIntoString(wxString& value,
 759                                    XmTextVerifyCallbackStruct *cbs)
 760 {
 761     /* _sm_
 762      * At least on my system (SunOS 4.1.3 + Motif 1.2), you need to think of
 763      * every event as a replace event.  cbs->text->ptr gives the replacement
 764      * text, cbs->startPos gives the index of the first char affected by the
 765      * replace, and cbs->endPos gives the index one more than the last char
 766      * affected by the replace (startPos == endPos implies an empty range).
 767      * Hence, a deletion is represented by replacing all input text with a
 768      * blank string ("", *not* NULL!).  A simple insertion that does not
 769      * overwrite any text has startPos == endPos.
 770      */
 771
 772     if ( !value )
 773     {
 774         // easy case: the ol value was empty
 775         value = cbs->text->ptr;
 776     }
 777     else
 778     {
 779         // merge the changes into the value
 780         const char * const passwd = value;
 781         int len = value.length();
 782
 783         len += ( cbs->text->ptr ?
 784                  strlen(cbs->text->ptr) :
 785                  0 ) + 1;                      // + new text (if any) + NUL
 786         len -= cbs->endPos - cbs->startPos;    // - text from affected region.
 787
 788         char * newS = new char [len];
 789         char * dest = newS,
 790              * insert = cbs->text->ptr;
 791
 792         // Copy (old) text from passwd, up to the start posn of the change.
 793         int i;
 794         const char * p = passwd;
 795         for (i = 0; i < cbs->startPos; ++i)
 796             *dest++ = *p++;
 797
 798         // Copy the text to be inserted).
 799         if (insert)
 800             while (*insert)
 801                 *dest++ = *insert++;
 802
 803         // Finally, copy into newS any remaining text from passwd[endPos] on.
 804         for (p = passwd + cbs->endPos; *p; )
 805             *dest++ = *p++;
 806         *dest = 0;
 807
 808         value = newS;
 809
 810         delete[] newS;
 811     }
 812 }
 813
 814 static void
 815 wxTextWindowChangedProc (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 816 {
 817     if (!wxGetWindowFromTable(w))
 818         // Widget has been deleted!
 819         return;
 820
 821     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 822     tw->SetModified(TRUE);
 823 }
 824
 825 static void
 826 wxTextWindowModifyProc (Widget WXUNUSED(w), XtPointer clientData, XmTextVerifyCallbackStruct *cbs)
 827 {
 828     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 829     tw->m_processedDefault = FALSE;
 830
 831     // First, do some stuff if it's a password control: in this case, we need
 832     // to store the string inside the class because GetValue() can't retrieve
 833     // it from the text ctrl. We do *not* do it in other circumstances because
 834     // it would double the amount of memory needed.
 835
 836     if ( tw->GetWindowStyleFlag() & wxTE_PASSWORD )
 837     {
 838         MergeChangesIntoString(tw->m_value, cbs);
 839
 840         if ( cbs->text->length > 0 )
 841         {
 842             int i;
 843             for (i = 0; i < cbs->text->length; ++i)
 844                 cbs->text->ptr[i] = '*';
 845             cbs->text->ptr[i] = '\0';
 846         }
 847     }
 848
 849     // If we're already within an OnChar, return: probably a programmatic
 850     // insertion.
 851     if (tw->m_tempCallbackStruct)
 852         return;
 853
 854     // Check for a backspace
 855     if (cbs->startPos == (cbs->currInsert - 1))
 856     {
 857         tw->DoSendEvents((void *)cbs, WXK_DELETE);
 858
 859         return;
 860     }
 861
 862     // Pasting operation: let it through without calling OnChar
 863     if (cbs->text->length > 1)
 864         return;
 865
 866     // Something other than text
 867     if (cbs->text->ptr == NULL)
 868         return;
 869
 870     // normal key press
 871     char ch = cbs->text->ptr[0];
 872     tw->DoSendEvents((void *)cbs, ch == '\n' ? '\r' : ch);
 873 }
 874
 875 static void
 876 wxTextWindowGainFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 877 {
 878     if (!wxGetWindowFromTable(w))
 879         return;
 880
 881     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 882     wxFocusEvent event(wxEVT_SET_FOCUS, tw->GetId());
 883     event.SetEventObject(tw);
 884     tw->GetEventHandler()->ProcessEvent(event);
 885 }
 886
 887 static void
 888 wxTextWindowLoseFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 889 {
 890     if (!wxGetWindowFromTable(w))
 891         return;
 892
 893     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 894     wxFocusEvent event(wxEVT_KILL_FOCUS, tw->GetId());
 895     event.SetEventObject(tw);
 896     tw->GetEventHandler()->ProcessEvent(event);
 897 }
 898
 899 static void wxTextWindowActivateProc(Widget w, XtPointer clientData,
 900                                      XmAnyCallbackStruct *WXUNUSED(ptr))
 901 {
 902     if (!wxGetWindowFromTable(w))
 903         return;
 904
 905     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 906
 907     if (tw->InSetValue())
 908         return;
 909
 910     wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER);
 911     event.SetId(tw->GetId());
 912     event.SetEventObject(tw);
 913     tw->ProcessCommand(event);
 914 }
 915
 916 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
 917 {
 918     Cut();
 919 }
 920
 921 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
 922 {
 923     Copy();
 924 }
 925
 926 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
 927 {
 928     Paste();
 929 }
 930
 931 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
 932 {
 933     Undo();
 934 }
 935
 936 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
 937 {
 938     Redo();
 939 }
 940
 941 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
 942 {
 943     event.Enable( CanCut() );
 944 }
 945
 946 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
 947 {
 948     event.Enable( CanCopy() );
 949 }
 950
 951 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
 952 {
 953     event.Enable( CanPaste() );
 954 }
 955
 956 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
 957 {
 958     event.Enable( CanUndo() );
 959 }
 960
 961 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
 962 {
 963     event.Enable( CanRedo() );
 964 }