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