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