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                                                        wxConstCast(name.c_str(), char),
 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                                   wxConstCast(name.c_str(), char),
 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, wxConstCast(value.c_str(), char),
 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, wxConstCast(value.c_str(), char),
 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         wxConstCast(value.c_str(), char));
 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 (wxConstCast(file.c_str(), char), &statb) == -1) || (statb.st_mode & S_IFMT) != S_IFREG ||
 398         !(fp = fopen (wxConstCast(file.c_str(), char), "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 (wxConstCast(theFile.c_str(), char), "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(),
 467                   wxConstCast(text.c_str(), char));
 468     XtVaSetValues ((Widget) m_mainWidget, XmNcursorPosition, textPosition, NULL);
 469     SetInsertionPoint(textPosition);
 470     XmTextShowPosition ((Widget) m_mainWidget, textPosition);
 471     m_modified = TRUE;
 472 }
 473
 474 void wxTextCtrl::AppendText(const wxString& text)
 475 {
 476     long textPosition = GetLastPosition() + strlen(text);
 477     XmTextInsert ((Widget) m_mainWidget, GetLastPosition(),
 478                   wxConstCast(text.c_str(), char));
 479     XtVaSetValues ((Widget) m_mainWidget, XmNcursorPosition, textPosition, NULL);
 480     SetInsertionPoint(textPosition);
 481     XmTextShowPosition ((Widget) m_mainWidget, textPosition);
 482     m_modified = TRUE;
 483 }
 484
 485 void wxTextCtrl::Clear()
 486 {
 487     XmTextSetString ((Widget) m_mainWidget, "");
 488     m_modified = FALSE;
 489 }
 490
 491 bool wxTextCtrl::IsModified() const
 492 {
 493     return m_modified;
 494 }
 495
 496 // Makes 'unmodified'
 497 void wxTextCtrl::DiscardEdits()
 498 {
 499     m_modified = FALSE;
 500 }
 501
 502 int wxTextCtrl::GetNumberOfLines() const
 503 {
 504     // HIDEOUSLY inefficient, but we have no choice.
 505     char *s = XmTextGetString ((Widget) m_mainWidget);
 506     if (s)
 507     {
 508         long i = 0;
 509         int currentLine = 0;
 510         bool finished = FALSE;
 511         while (!finished)
 512         {
 513             int ch = s[i];
 514             if (ch == '\n')
 515             {
 516                 currentLine++;
 517                 i++;
 518             }
 519             else if (ch == 0)
 520             {
 521                 finished = TRUE;
 522             }
 523             else
 524                 i++;
 525         }
 526
 527         XtFree (s);
 528         return currentLine;
 529     }
 530     return 0;
 531 }
 532
 533 long wxTextCtrl::XYToPosition(long x, long y) const
 534 {
 535 /* It seems, that there is a bug in some versions of the Motif library,
 536     so the original wxWin-Code doesn't work. */
 537     /*
 538     Widget textWidget = (Widget) handle;
 539     return (long) XmTextXYToPos (textWidget, (Position) x, (Position) y);
 540     */
 541     /* Now a little workaround: */
 542     long r=0;
 543     for (int i=0; i<y; i++) r+=(GetLineLength(i)+1);
 544     return r+x;
 545 }
 546
 547 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 548 {
 549     Position xx, yy;
 550     XmTextPosToXY((Widget) m_mainWidget, pos, &xx, &yy);
 551     if ( x )
 552         *x = xx;
 553     if ( y )
 554         *y = yy;
 555
 556     return TRUE;
 557 }
 558
 559 void wxTextCtrl::ShowPosition(long pos)
 560 {
 561     XmTextShowPosition ((Widget) m_mainWidget, (XmTextPosition) pos);
 562 }
 563
 564 int wxTextCtrl::GetLineLength(long lineNo) const
 565 {
 566     wxString str = GetLineText (lineNo);
 567     return (int) str.Length();
 568 }
 569
 570 wxString wxTextCtrl::GetLineText(long lineNo) const
 571 {
 572     // HIDEOUSLY inefficient, but we have no choice.
 573     char *s = XmTextGetString ((Widget) m_mainWidget);
 574
 575     if (s)
 576     {
 577         wxString buf("");
 578         long i;
 579         int currentLine = 0;
 580         for (i = 0; currentLine != lineNo && s[i]; i++ )
 581             if (s[i] == '\n')
 582                 currentLine++;
 583             // Now get the text
 584             int j;
 585             for (j = 0; s[i] && s[i] != '\n'; i++, j++ )
 586                 buf += s[i];
 587
 588             XtFree(s);
 589             return buf;
 590     }
 591     else
 592         return wxEmptyString;
 593 }
 594
 595 /*
 596 * Text item
 597 */
 598
 599 void wxTextCtrl::Command(wxCommandEvent & event)
 600 {
 601     SetValue (event.GetString());
 602     ProcessCommand (event);
 603 }
 604
 605 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 606 {
 607     // By default, load the first file into the text window.
 608     if (event.GetNumberOfFiles() > 0)
 609     {
 610         LoadFile(event.GetFiles()[0]);
 611     }
 612 }
 613
 614 void wxTextCtrl::OnChar(wxKeyEvent& event)
 615 {
 616     // Indicates that we should generate a normal command, because
 617     // we're letting default behaviour happen (otherwise it's vetoed
 618     // by virtue of overriding OnChar)
 619     m_processedDefault = TRUE;
 620
 621     if (m_tempCallbackStruct)
 622     {
 623         XmTextVerifyCallbackStruct *textStruct =
 624             (XmTextVerifyCallbackStruct *) m_tempCallbackStruct;
 625         textStruct->doit = True;
 626         if (isascii(event.m_keyCode) && (textStruct->text->length == 1))
 627         {
 628             textStruct->text->ptr[0] = ((event.m_keyCode == WXK_RETURN) ? 10 : event.m_keyCode);
 629         }
 630     }
 631 }
 632
 633 void wxTextCtrl::ChangeFont(bool keepOriginalSize)
 634 {
 635     wxWindow::ChangeFont(keepOriginalSize);
 636 }
 637
 638 void wxTextCtrl::ChangeBackgroundColour()
 639 {
 640     wxWindow::ChangeBackgroundColour();
 641
 642     /* TODO: should scrollbars be affected? Should probably have separate
 643     * function to change them (by default, taken from wxSystemSettings)
 644     */
 645     if (m_windowStyle & wxTE_MULTILINE)
 646     {
 647         Widget parent = XtParent ((Widget) m_mainWidget);
 648         Widget hsb, vsb;
 649
 650         XtVaGetValues (parent,
 651             XmNhorizontalScrollBar, &hsb,
 652             XmNverticalScrollBar, &vsb,
 653             NULL);
 654         wxColour backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
 655         if (hsb)
 656             DoChangeBackgroundColour((WXWidget) hsb, backgroundColour, TRUE);
 657         if (vsb)
 658             DoChangeBackgroundColour((WXWidget) vsb, backgroundColour, TRUE);
 659
 660         // MBN: why change parent background?
 661         // DoChangeBackgroundColour((WXWidget) parent, m_backgroundColour, TRUE);
 662     }
 663 }
 664
 665 void wxTextCtrl::ChangeForegroundColour()
 666 {
 667     wxWindow::ChangeForegroundColour();
 668
 669     if (m_windowStyle & wxTE_MULTILINE)
 670     {
 671         Widget parent = XtParent ((Widget) m_mainWidget);
 672         Widget hsb, vsb;
 673
 674         XtVaGetValues (parent,
 675             XmNhorizontalScrollBar, &hsb,
 676             XmNverticalScrollBar, &vsb,
 677             NULL);
 678
 679             /* TODO: should scrollbars be affected? Should probably have separate
 680             * function to change them (by default, taken from wxSystemSettings)
 681             if (hsb)
 682             DoChangeForegroundColour((WXWidget) hsb, m_foregroundColour);
 683             if (vsb)
 684             DoChangeForegroundColour((WXWidget) vsb, m_foregroundColour);
 685         */
 686         DoChangeForegroundColour((WXWidget) parent, m_foregroundColour);
 687     }
 688 }
 689
 690 void wxTextCtrl::DoSendEvents(void *wxcbs, long keycode)
 691 {
 692     // we're in process of updating the text control
 693     m_tempCallbackStruct = wxcbs;
 694
 695     XmTextVerifyCallbackStruct *cbs = (XmTextVerifyCallbackStruct *)wxcbs;
 696
 697     wxKeyEvent event (wxEVT_CHAR);
 698     event.SetId(GetId());
 699     event.m_keyCode = keycode;
 700     event.SetEventObject(this);
 701
 702     // Only if wxTextCtrl::OnChar is called will this be set to True (and
 703     // the character passed through)
 704     cbs->doit = False;
 705
 706     GetEventHandler()->ProcessEvent(event);
 707
 708     if ( !InSetValue() && m_processedDefault )
 709     {
 710         // Can generate a command
 711         wxCommandEvent commandEvent(wxEVT_COMMAND_TEXT_UPDATED, GetId());
 712         commandEvent.SetEventObject(this);
 713         ProcessCommand(commandEvent);
 714     }
 715
 716     // do it after the (user) event handlers processed the events because
 717     // otherwise GetValue() would return incorrect (not yet updated value)
 718     m_tempCallbackStruct = NULL;
 719 }
 720
 721 wxSize wxDoGetSingleTextCtrlBestSize( Widget textWidget,
 722                                       const wxWindow* window )
 723 {
 724     Dimension xmargin, ymargin, highlight, shadow;
 725     char* value;
 726
 727     XtVaGetValues( textWidget,
 728                    XmNmarginWidth, &xmargin,
 729                    XmNmarginHeight, &ymargin,
 730                    XmNvalue, &value,
 731                    XmNhighlightThickness, &highlight,
 732                    XmNshadowThickness, &shadow,
 733                    NULL );
 734
 735     if( !value )
 736         value = "|";
 737
 738     int x, y;
 739     window->GetTextExtent( value, &x, &y );
 740
 741     if( x < 100 ) x = 100;
 742
 743     return wxSize( x + 2 * xmargin + 2 * highlight + 2 * shadow,
 744                    // MBN: +2 necessary: Lesstif bug or mine?
 745                    y + 2 * ymargin + 2 * highlight + 2 * shadow + 2 );
 746 }
 747
 748 wxSize wxTextCtrl::DoGetBestSize() const
 749 {
 750     if( IsSingleLine() )
 751         return wxDoGetSingleTextCtrlBestSize( (Widget)m_mainWidget, this );
 752     else
 753         return wxWindow::DoGetBestSize();
 754 }
 755
 756 // ----------------------------------------------------------------------------
 757 // helpers and Motif callbacks
 758 // ----------------------------------------------------------------------------
 759
 760 static void MergeChangesIntoString(wxString& value,
 761                                    XmTextVerifyCallbackStruct *cbs)
 762 {
 763     /* _sm_
 764      * At least on my system (SunOS 4.1.3 + Motif 1.2), you need to think of
 765      * every event as a replace event.  cbs->text->ptr gives the replacement
 766      * text, cbs->startPos gives the index of the first char affected by the
 767      * replace, and cbs->endPos gives the index one more than the last char
 768      * affected by the replace (startPos == endPos implies an empty range).
 769      * Hence, a deletion is represented by replacing all input text with a
 770      * blank string ("", *not* NULL!).  A simple insertion that does not
 771      * overwrite any text has startPos == endPos.
 772      */
 773
 774     if ( !value )
 775     {
 776         // easy case: the ol value was empty
 777         value = cbs->text->ptr;
 778     }
 779     else
 780     {
 781         // merge the changes into the value
 782         const char * const passwd = value;
 783         int len = value.length();
 784
 785         len += ( cbs->text->ptr ?
 786                  strlen(cbs->text->ptr) :
 787                  0 ) + 1;                      // + new text (if any) + NUL
 788         len -= cbs->endPos - cbs->startPos;    // - text from affected region.
 789
 790         char * newS = new char [len];
 791         char * dest = newS,
 792              * insert = cbs->text->ptr;
 793
 794         // Copy (old) text from passwd, up to the start posn of the change.
 795         int i;
 796         const char * p = passwd;
 797         for (i = 0; i < cbs->startPos; ++i)
 798             *dest++ = *p++;
 799
 800         // Copy the text to be inserted).
 801         if (insert)
 802             while (*insert)
 803                 *dest++ = *insert++;
 804
 805         // Finally, copy into newS any remaining text from passwd[endPos] on.
 806         for (p = passwd + cbs->endPos; *p; )
 807             *dest++ = *p++;
 808         *dest = 0;
 809
 810         value = newS;
 811
 812         delete[] newS;
 813     }
 814 }
 815
 816 static void
 817 wxTextWindowChangedProc (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 818 {
 819     if (!wxGetWindowFromTable(w))
 820         // Widget has been deleted!
 821         return;
 822
 823     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 824     tw->SetModified(TRUE);
 825 }
 826
 827 static void
 828 wxTextWindowModifyProc (Widget WXUNUSED(w), XtPointer clientData, XmTextVerifyCallbackStruct *cbs)
 829 {
 830     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 831     tw->m_processedDefault = FALSE;
 832
 833     // First, do some stuff if it's a password control: in this case, we need
 834     // to store the string inside the class because GetValue() can't retrieve
 835     // it from the text ctrl. We do *not* do it in other circumstances because
 836     // it would double the amount of memory needed.
 837
 838     if ( tw->GetWindowStyleFlag() & wxTE_PASSWORD )
 839     {
 840         MergeChangesIntoString(tw->m_value, cbs);
 841
 842         if ( cbs->text->length > 0 )
 843         {
 844             int i;
 845             for (i = 0; i < cbs->text->length; ++i)
 846                 cbs->text->ptr[i] = '*';
 847             cbs->text->ptr[i] = '\0';
 848         }
 849     }
 850
 851     // If we're already within an OnChar, return: probably a programmatic
 852     // insertion.
 853     if (tw->m_tempCallbackStruct)
 854         return;
 855
 856     // Check for a backspace
 857     if (cbs->startPos == (cbs->currInsert - 1))
 858     {
 859         tw->DoSendEvents((void *)cbs, WXK_DELETE);
 860
 861         return;
 862     }
 863
 864     // Pasting operation: let it through without calling OnChar
 865     if (cbs->text->length > 1)
 866         return;
 867
 868     // Something other than text
 869     if (cbs->text->ptr == NULL)
 870         return;
 871
 872     // normal key press
 873     char ch = cbs->text->ptr[0];
 874     tw->DoSendEvents((void *)cbs, ch == '\n' ? '\r' : ch);
 875 }
 876
 877 static void
 878 wxTextWindowGainFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 879 {
 880     if (!wxGetWindowFromTable(w))
 881         return;
 882
 883     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 884     wxFocusEvent event(wxEVT_SET_FOCUS, tw->GetId());
 885     event.SetEventObject(tw);
 886     tw->GetEventHandler()->ProcessEvent(event);
 887 }
 888
 889 static void
 890 wxTextWindowLoseFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 891 {
 892     if (!wxGetWindowFromTable(w))
 893         return;
 894
 895     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 896     wxFocusEvent event(wxEVT_KILL_FOCUS, tw->GetId());
 897     event.SetEventObject(tw);
 898     tw->GetEventHandler()->ProcessEvent(event);
 899 }
 900
 901 static void wxTextWindowActivateProc(Widget w, XtPointer clientData,
 902                                      XmAnyCallbackStruct *WXUNUSED(ptr))
 903 {
 904     if (!wxGetWindowFromTable(w))
 905         return;
 906
 907     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 908
 909     if (tw->InSetValue())
 910         return;
 911
 912     wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER);
 913     event.SetId(tw->GetId());
 914     event.SetEventObject(tw);
 915     tw->ProcessCommand(event);
 916 }
 917
 918 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
 919 {
 920     Cut();
 921 }
 922
 923 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
 924 {
 925     Copy();
 926 }
 927
 928 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
 929 {
 930     Paste();
 931 }
 932
 933 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
 934 {
 935     Undo();
 936 }
 937
 938 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
 939 {
 940     Redo();
 941 }
 942
 943 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
 944 {
 945     event.Enable( CanCut() );
 946 }
 947
 948 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
 949 {
 950     event.Enable( CanCopy() );
 951 }
 952
 953 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
 954 {
 955     event.Enable( CanPaste() );
 956 }
 957
 958 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
 959 {
 960     event.Enable( CanUndo() );
 961 }
 962
 963 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
 964 {
 965     event.Enable( CanRedo() );
 966 }