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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21     #pragma implementation "textctrl.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __VMS
  28 #define XtParent XTPARENT
  29 #endif
  30
  31 #include "wx/defs.h"
  32
  33 #include <sys/types.h>
  34 #include <sys/stat.h>
  35 #include <ctype.h>
  36
  37 #include "wx/textctrl.h"
  38 #include "wx/settings.h"
  39 #include "wx/filefn.h"
  40 #include "wx/utils.h"
  41
  42 #ifdef __VMS__
  43 #pragma message disable nosimpint
  44 #endif
  45 #include <Xm/Text.h>
  46 #ifdef __VMS__
  47 #pragma message enable nosimpint
  48 #endif
  49
  50 #include "wx/motif/private.h"
  51
  52 // ----------------------------------------------------------------------------
  53 // private functions
  54 // ----------------------------------------------------------------------------
  55
  56 // helper: inserts the new text in the value of the text ctrl and returns the
  57 // result in place
  58 static void MergeChangesIntoString(wxString& value,
  59                                    XmTextVerifyCallbackStruct *textStruct);
  60
  61 // callbacks
  62 static void wxTextWindowChangedProc(Widget w, XtPointer clientData, XtPointer ptr);
  63 static void wxTextWindowModifyProc(Widget w, XtPointer clientData, XmTextVerifyCallbackStruct *cbs);
  64 static void wxTextWindowGainFocusProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs);
  65 static void wxTextWindowLoseFocusProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs);
  66 static void wxTextWindowActivateProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *ptr);
  67
  68     IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  69
  70     BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  71         EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  72         EVT_CHAR(wxTextCtrl::OnChar)
  73
  74     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
  75     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
  76     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
  77     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
  78     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
  79
  80     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
  81     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
  82     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
  83     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
  84     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
  85
  86     END_EVENT_TABLE()
  87
  88 // ============================================================================
  89 // implementation
  90 // ============================================================================
  91
  92 // ----------------------------------------------------------------------------
  93 // wxTextCtrl
  94 // ----------------------------------------------------------------------------
  95
  96 // Text item
  97 wxTextCtrl::wxTextCtrl()
  98 {
  99     m_tempCallbackStruct = (void*) NULL;
 100     m_modified = false;
 101     m_processedDefault = false;
 102 }
 103
 104 bool wxTextCtrl::Create(wxWindow *parent,
 105                         wxWindowID id,
 106                         const wxString& value,
 107                         const wxPoint& pos,
 108                         const wxSize& size,
 109                         long style,
 110                         const wxValidator& validator,
 111                         const wxString& name)
 112 {
 113     if( !CreateControl( parent, id, pos, size, style, validator, name ) )
 114         return false;
 115
 116     m_tempCallbackStruct = (void*) NULL;
 117     m_modified = false;
 118     m_processedDefault = false;
 119
 120     m_backgroundColour = *wxWHITE;
 121
 122     Widget parentWidget = (Widget) parent->GetClientWidget();
 123
 124     Bool wantHorizScroll = (m_windowStyle & wxHSCROLL) != 0 ? True : False;
 125     // If we don't have horizontal scrollbars, we want word wrap.
 126     // OpenMotif 2.1 crashes if wantWordWrap is True in Japanese
 127     // locale (and probably other multibyte locales). The check might be
 128     // more precise
 129 #if wxCHECK_LESSTIF() || wxCHECK_MOTIF_VERSION( 2, 2 )
 130     Bool wantWordWrap = wantHorizScroll == True ? False : True;
 131 #else
 132     Bool wantWordWrap = False;
 133 #endif
 134
 135     if (m_windowStyle & wxTE_MULTILINE)
 136     {
 137         Arg args[8];
 138         int count = 0;
 139         XtSetArg (args[count], XmNscrollHorizontal, wantHorizScroll); ++count;
 140         XtSetArg (args[count], (String) wxFont::GetFontTag(),
 141                   m_font.GetFontType( XtDisplay(parentWidget) ) ); ++count;
 142         XtSetArg (args[count], XmNwordWrap, wantWordWrap); ++count;
 143         XtSetArg (args[count], XmNvalue, value.c_str()); ++count;
 144         XtSetArg (args[count], XmNeditable,
 145                   style & wxTE_READONLY ? False : True); ++count;
 146         XtSetArg (args[count], XmNeditMode, XmMULTI_LINE_EDIT ); ++count;
 147
 148         m_mainWidget =
 149             (WXWidget) XmCreateScrolledText(parentWidget,
 150                                             wxConstCast(name.c_str(), char),
 151                                             args, count);
 152
 153         XtManageChild ((Widget) m_mainWidget);
 154     }
 155     else
 156     {
 157         m_mainWidget = (WXWidget)XtVaCreateManagedWidget
 158                                  (
 159                                   wxConstCast(name.c_str(), char),
 160                                   xmTextWidgetClass,
 161                                   parentWidget,
 162                                   wxFont::GetFontTag(), m_font.GetFontType( XtDisplay(parentWidget) ),
 163                                   XmNvalue, value.c_str(),
 164                                   XmNeditable, (style & wxTE_READONLY) ?
 165                                       False : True,
 166                                   NULL
 167                                  );
 168
 169 #if 0
 170         // TODO: Is this relevant? What does it do?
 171         int noCols = 2;
 172         if (!value.IsNull() && (value.Length() > (unsigned int) noCols))
 173             noCols = value.Length();
 174         XtVaSetValues((Widget) m_mainWidget,
 175                       XmNcolumns, noCols,
 176                       NULL);
 177 #endif
 178     }
 179
 180     // remove border if asked for
 181     if ( style & wxNO_BORDER )
 182     {
 183         XtVaSetValues((Widget)m_mainWidget,
 184                       XmNshadowThickness, 0,
 185                       NULL);
 186     }
 187
 188     // install callbacks
 189     XtAddCallback((Widget) m_mainWidget, XmNvalueChangedCallback, (XtCallbackProc)wxTextWindowChangedProc, (XtPointer)this);
 190
 191     XtAddCallback((Widget) m_mainWidget, XmNmodifyVerifyCallback, (XtCallbackProc)wxTextWindowModifyProc, (XtPointer)this);
 192
 193     XtAddCallback((Widget) m_mainWidget, XmNactivateCallback, (XtCallbackProc)wxTextWindowActivateProc, (XtPointer)this);
 194
 195     XtAddCallback((Widget) m_mainWidget, XmNfocusCallback, (XtCallbackProc)wxTextWindowGainFocusProc, (XtPointer)this);
 196
 197     XtAddCallback((Widget) m_mainWidget, XmNlosingFocusCallback, (XtCallbackProc)wxTextWindowLoseFocusProc, (XtPointer)this);
 198
 199     AttachWidget (parent, m_mainWidget, (WXWidget) NULL,
 200                   pos.x, pos.y, size.x, size.y);
 201
 202     ChangeBackgroundColour();
 203
 204     return true;
 205 }
 206
 207 WXWidget wxTextCtrl::GetTopWidget() const
 208 {
 209     return IsMultiLine() ? (WXWidget)XtParent((Widget)m_mainWidget)
 210                          : m_mainWidget;
 211 }
 212
 213 wxString wxTextCtrl::GetValue() const
 214 {
 215     wxString str; // result
 216
 217     if (m_windowStyle & wxTE_PASSWORD)
 218     {
 219         // the value is stored always in m_value because it can't be retrieved
 220         // from the text control
 221         str = m_value;
 222     }
 223     else
 224     {
 225         // just get the string from Motif
 226         char *s = XmTextGetString ((Widget) m_mainWidget);
 227         if ( s )
 228         {
 229             str = s;
 230             XtFree (s);
 231         }
 232         //else: return empty string
 233
 234         if ( m_tempCallbackStruct )
 235         {
 236             // the string in the control isn't yet updated, can't use it as is
 237             MergeChangesIntoString(str, (XmTextVerifyCallbackStruct *)
 238                                    m_tempCallbackStruct);
 239         }
 240     }
 241
 242     return str;
 243 }
 244
 245 void wxTextCtrl::SetValue(const wxString& text)
 246 {
 247     m_inSetValue = true;
 248
 249     XmTextSetString ((Widget) m_mainWidget, wxConstCast(text.c_str(), char));
 250     XtVaSetValues ((Widget) m_mainWidget,
 251                    XmNcursorPosition, text.length(),
 252                    NULL);
 253
 254     SetInsertionPoint(text.length());
 255     XmTextShowPosition ((Widget) m_mainWidget, text.length());
 256     m_modified = TRUE;
 257
 258     m_inSetValue = false;
 259 }
 260
 261 // Clipboard operations
 262 void wxTextCtrl::Copy()
 263 {
 264     XmTextCopy((Widget) m_mainWidget, CurrentTime);
 265 }
 266
 267 void wxTextCtrl::Cut()
 268 {
 269     XmTextCut((Widget) m_mainWidget, CurrentTime);
 270 }
 271
 272 void wxTextCtrl::Paste()
 273 {
 274     XmTextPaste((Widget) m_mainWidget);
 275 }
 276
 277 bool wxTextCtrl::CanCopy() const
 278 {
 279     // Can copy if there's a selection
 280     long from, to;
 281     GetSelection(& from, & to);
 282     return (from != to) ;
 283 }
 284
 285 bool wxTextCtrl::CanCut() const
 286 {
 287     // Can cut if there's a selection
 288     long from, to;
 289     GetSelection(& from, & to);
 290     return (from != to) && (IsEditable());
 291 }
 292
 293 bool wxTextCtrl::CanPaste() const
 294 {
 295     return IsEditable() ;
 296 }
 297
 298 // Undo/redo
 299 void wxTextCtrl::Undo()
 300 {
 301     // Not possible in Motif
 302 }
 303
 304 void wxTextCtrl::Redo()
 305 {
 306     // Not possible in Motif
 307 }
 308
 309 bool wxTextCtrl::CanUndo() const
 310 {
 311     // No Undo in Motif
 312     return false;
 313 }
 314
 315 bool wxTextCtrl::CanRedo() const
 316 {
 317     // No Redo in Motif
 318     return false;
 319 }
 320
 321 // If the return values from and to are the same, there is no
 322 // selection.
 323 void wxTextCtrl::GetSelection(long* from, long* to) const
 324 {
 325     XmTextPosition left, right;
 326
 327     XmTextGetSelectionPosition((Widget) m_mainWidget, & left, & right);
 328
 329     *from = (long) left;
 330     *to = (long) right;
 331 }
 332
 333 bool wxTextCtrl::IsEditable() const
 334 {
 335     return (XmTextGetEditable((Widget) m_mainWidget) != 0);
 336 }
 337
 338 void wxTextCtrl::SetEditable(bool editable)
 339 {
 340     XmTextSetEditable((Widget) m_mainWidget, (Boolean) editable);
 341 }
 342
 343 void wxTextCtrl::SetInsertionPoint(long pos)
 344 {
 345     XmTextSetInsertionPosition ((Widget) m_mainWidget, (XmTextPosition) pos);
 346 }
 347
 348 void wxTextCtrl::SetInsertionPointEnd()
 349 {
 350     wxTextPos pos = GetLastPosition();
 351     SetInsertionPoint(pos);
 352 }
 353
 354 long wxTextCtrl::GetInsertionPoint() const
 355 {
 356     return (long) XmTextGetInsertionPosition ((Widget) m_mainWidget);
 357 }
 358
 359 wxTextPos wxTextCtrl::GetLastPosition() const
 360 {
 361     return (long) XmTextGetLastPosition ((Widget) m_mainWidget);
 362 }
 363
 364 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 365 {
 366     XmTextReplace ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 367         wxConstCast(value.c_str(), char));
 368 }
 369
 370 void wxTextCtrl::Remove(long from, long to)
 371 {
 372     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 373                       (Time) 0);
 374     XmTextRemove ((Widget) m_mainWidget);
 375 }
 376
 377 void wxTextCtrl::SetSelection(long from, long to)
 378 {
 379     if( to == -1 )
 380         to = GetLastPosition();
 381
 382     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 383                       (Time) 0);
 384 }
 385
 386 void wxTextCtrl::WriteText(const wxString& text)
 387 {
 388     long textPosition = GetInsertionPoint() + text.length();
 389     XmTextInsert ((Widget) m_mainWidget, GetInsertionPoint(),
 390                   wxConstCast(text.c_str(), char));
 391     XtVaSetValues ((Widget) m_mainWidget, XmNcursorPosition, textPosition, NULL);
 392     SetInsertionPoint(textPosition);
 393     XmTextShowPosition ((Widget) m_mainWidget, textPosition);
 394     m_modified = true;
 395 }
 396
 397 void wxTextCtrl::AppendText(const wxString& text)
 398 {
 399     wxTextPos textPosition = GetLastPosition() + text.length();
 400     XmTextInsert ((Widget) m_mainWidget, GetLastPosition(),
 401                   wxConstCast(text.c_str(), char));
 402     XtVaSetValues ((Widget) m_mainWidget, XmNcursorPosition, textPosition, NULL);
 403     SetInsertionPoint(textPosition);
 404     XmTextShowPosition ((Widget) m_mainWidget, textPosition);
 405     m_modified = true;
 406 }
 407
 408 void wxTextCtrl::Clear()
 409 {
 410     XmTextSetString ((Widget) m_mainWidget, "");
 411     m_modified = false;
 412 }
 413
 414 bool wxTextCtrl::IsModified() const
 415 {
 416     return m_modified;
 417 }
 418
 419 // Makes modified or unmodified
 420 void wxTextCtrl::MarkDirty()
 421 {
 422     m_modified = true;
 423 }
 424
 425 void wxTextCtrl::DiscardEdits()
 426 {
 427     m_modified = false;
 428 }
 429
 430 int wxTextCtrl::GetNumberOfLines() const
 431 {
 432     // HIDEOUSLY inefficient, but we have no choice.
 433     char *s = XmTextGetString ((Widget) m_mainWidget);
 434     if (s)
 435     {
 436         long i = 0;
 437         int currentLine = 0;
 438         bool finished = false;
 439         while (!finished)
 440         {
 441             int ch = s[i];
 442             if (ch == '\n')
 443             {
 444                 currentLine++;
 445                 i++;
 446             }
 447             else if (ch == 0)
 448             {
 449                 finished = true;
 450             }
 451             else
 452                 i++;
 453         }
 454
 455         XtFree (s);
 456         return currentLine;
 457     }
 458     return 0;
 459 }
 460
 461 long wxTextCtrl::XYToPosition(long x, long y) const
 462 {
 463 /* It seems, that there is a bug in some versions of the Motif library,
 464     so the original wxWin-Code doesn't work. */
 465     /*
 466     Widget textWidget = (Widget) handle;
 467     return (long) XmTextXYToPos (textWidget, (Position) x, (Position) y);
 468     */
 469     /* Now a little workaround: */
 470     long r=0;
 471     for (int i=0; i<y; i++) r+=(GetLineLength(i)+1);
 472     return r+x;
 473 }
 474
 475 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 476 {
 477     Position xx, yy;
 478     XmTextPosToXY((Widget) m_mainWidget, pos, &xx, &yy);
 479     if ( x )
 480         *x = xx;
 481     if ( y )
 482         *y = yy;
 483
 484     return true;
 485 }
 486
 487 void wxTextCtrl::ShowPosition(long pos)
 488 {
 489     XmTextShowPosition ((Widget) m_mainWidget, (XmTextPosition) pos);
 490 }
 491
 492 int wxTextCtrl::GetLineLength(long lineNo) const
 493 {
 494     wxString str = GetLineText (lineNo);
 495     return (int) str.Length();
 496 }
 497
 498 wxString wxTextCtrl::GetLineText(long lineNo) const
 499 {
 500     // HIDEOUSLY inefficient, but we have no choice.
 501     char *s = XmTextGetString ((Widget) m_mainWidget);
 502
 503     if (s)
 504     {
 505         wxString buf("");
 506         long i;
 507         int currentLine = 0;
 508         for (i = 0; currentLine != lineNo && s[i]; i++ )
 509             if (s[i] == '\n')
 510                 currentLine++;
 511             // Now get the text
 512             int j;
 513             for (j = 0; s[i] && s[i] != '\n'; i++, j++ )
 514                 buf += s[i];
 515
 516             XtFree(s);
 517             return buf;
 518     }
 519     else
 520         return wxEmptyString;
 521 }
 522
 523 /*
 524 * Text item
 525 */
 526
 527 void wxTextCtrl::Command(wxCommandEvent & event)
 528 {
 529     SetValue (event.GetString());
 530     ProcessCommand (event);
 531 }
 532
 533 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 534 {
 535     // By default, load the first file into the text window.
 536     if (event.GetNumberOfFiles() > 0)
 537     {
 538         LoadFile(event.GetFiles()[0]);
 539     }
 540 }
 541
 542 void wxTextCtrl::OnChar(wxKeyEvent& event)
 543 {
 544     // Indicates that we should generate a normal command, because
 545     // we're letting default behaviour happen (otherwise it's vetoed
 546     // by virtue of overriding OnChar)
 547     m_processedDefault = true;
 548
 549     if (m_tempCallbackStruct)
 550     {
 551         XmTextVerifyCallbackStruct *textStruct =
 552             (XmTextVerifyCallbackStruct *) m_tempCallbackStruct;
 553         textStruct->doit = True;
 554         if (isascii(event.m_keyCode) && (textStruct->text->length == 1))
 555         {
 556             textStruct->text->ptr[0] = ((event.m_keyCode == WXK_RETURN) ? 10 : event.m_keyCode);
 557         }
 558     }
 559 }
 560
 561 void wxTextCtrl::ChangeFont(bool keepOriginalSize)
 562 {
 563     wxWindow::ChangeFont(keepOriginalSize);
 564 }
 565
 566 void wxTextCtrl::ChangeBackgroundColour()
 567 {
 568     wxWindow::ChangeBackgroundColour();
 569
 570     /* TODO: should scrollbars be affected? Should probably have separate
 571     * function to change them (by default, taken from wxSystemSettings)
 572     */
 573     if (m_windowStyle & wxTE_MULTILINE)
 574     {
 575         Widget parent = XtParent ((Widget) m_mainWidget);
 576         Widget hsb, vsb;
 577
 578         XtVaGetValues (parent,
 579             XmNhorizontalScrollBar, &hsb,
 580             XmNverticalScrollBar, &vsb,
 581             NULL);
 582         wxColour backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
 583         if (hsb)
 584             wxDoChangeBackgroundColour((WXWidget) hsb, backgroundColour, true);
 585         if (vsb)
 586             wxDoChangeBackgroundColour((WXWidget) vsb, backgroundColour, true);
 587
 588         // MBN: why change parent background?
 589         // DoChangeBackgroundColour((WXWidget) parent, m_backgroundColour, true);
 590     }
 591 }
 592
 593 void wxTextCtrl::ChangeForegroundColour()
 594 {
 595     wxWindow::ChangeForegroundColour();
 596
 597     if (m_windowStyle & wxTE_MULTILINE)
 598     {
 599         Widget parent = XtParent ((Widget) m_mainWidget);
 600         Widget hsb, vsb;
 601
 602         XtVaGetValues (parent,
 603             XmNhorizontalScrollBar, &hsb,
 604             XmNverticalScrollBar, &vsb,
 605             NULL);
 606
 607             /* TODO: should scrollbars be affected? Should probably have separate
 608             * function to change them (by default, taken from wxSystemSettings)
 609             if (hsb)
 610             DoChangeForegroundColour((WXWidget) hsb, m_foregroundColour);
 611             if (vsb)
 612             DoChangeForegroundColour((WXWidget) vsb, m_foregroundColour);
 613         */
 614         wxDoChangeForegroundColour((WXWidget) parent, m_foregroundColour);
 615     }
 616 }
 617
 618 void wxTextCtrl::DoSendEvents(void *wxcbs, long keycode)
 619 {
 620     // we're in process of updating the text control
 621     m_tempCallbackStruct = wxcbs;
 622
 623     XmTextVerifyCallbackStruct *cbs = (XmTextVerifyCallbackStruct *)wxcbs;
 624
 625     wxKeyEvent event (wxEVT_CHAR);
 626     event.SetId(GetId());
 627     event.m_keyCode = keycode;
 628     event.SetEventObject(this);
 629
 630     // Only if wxTextCtrl::OnChar is called will this be set to True (and
 631     // the character passed through)
 632     cbs->doit = False;
 633
 634     GetEventHandler()->ProcessEvent(event);
 635
 636     if ( !InSetValue() && m_processedDefault )
 637     {
 638         // Can generate a command
 639         wxCommandEvent commandEvent(wxEVT_COMMAND_TEXT_UPDATED, GetId());
 640         commandEvent.SetEventObject(this);
 641         ProcessCommand(commandEvent);
 642     }
 643
 644     // do it after the (user) event handlers processed the events because
 645     // otherwise GetValue() would return incorrect (not yet updated value)
 646     m_tempCallbackStruct = NULL;
 647 }
 648
 649 wxSize wxDoGetSingleTextCtrlBestSize( Widget textWidget,
 650                                       const wxWindow* window )
 651 {
 652     Dimension xmargin, ymargin, highlight, shadow;
 653     char* value;
 654
 655     XtVaGetValues( textWidget,
 656                    XmNmarginWidth, &xmargin,
 657                    XmNmarginHeight, &ymargin,
 658                    XmNvalue, &value,
 659                    XmNhighlightThickness, &highlight,
 660                    XmNshadowThickness, &shadow,
 661                    NULL );
 662
 663     if( !value )
 664         value = "|";
 665
 666     int x, y;
 667     window->GetTextExtent( value, &x, &y );
 668
 669     if( x < 100 ) x = 100;
 670
 671     return wxSize( x + 2 * xmargin + 2 * highlight + 2 * shadow,
 672                    // MBN: +2 necessary: Lesstif bug or mine?
 673                    y + 2 * ymargin + 2 * highlight + 2 * shadow + 2 );
 674 }
 675
 676 wxSize wxTextCtrl::DoGetBestSize() const
 677 {
 678     if( IsSingleLine() )
 679     {
 680         wxSize best = wxControl::DoGetBestSize();
 681
 682         if( best.x < 110 ) best.x = 110;
 683
 684         return best;
 685     }
 686     else
 687         return wxWindow::DoGetBestSize();
 688 }
 689
 690 // ----------------------------------------------------------------------------
 691 // helpers and Motif callbacks
 692 // ----------------------------------------------------------------------------
 693
 694 static void MergeChangesIntoString(wxString& value,
 695                                    XmTextVerifyCallbackStruct *cbs)
 696 {
 697     /* _sm_
 698      * At least on my system (SunOS 4.1.3 + Motif 1.2), you need to think of
 699      * every event as a replace event.  cbs->text->ptr gives the replacement
 700      * text, cbs->startPos gives the index of the first char affected by the
 701      * replace, and cbs->endPos gives the index one more than the last char
 702      * affected by the replace (startPos == endPos implies an empty range).
 703      * Hence, a deletion is represented by replacing all input text with a
 704      * blank string ("", *not* NULL!).  A simple insertion that does not
 705      * overwrite any text has startPos == endPos.
 706      */
 707
 708     if ( !value )
 709     {
 710         // easy case: the ol value was empty
 711         value = cbs->text->ptr;
 712     }
 713     else
 714     {
 715         // merge the changes into the value
 716         const char * const passwd = value;
 717         int len = value.length();
 718
 719         len += ( cbs->text->ptr ?
 720                  strlen(cbs->text->ptr) :
 721                  0 ) + 1;                      // + new text (if any) + NUL
 722         len -= cbs->endPos - cbs->startPos;    // - text from affected region.
 723
 724         char * newS = new char [len];
 725         char * dest = newS,
 726              * insert = cbs->text->ptr;
 727
 728         // Copy (old) text from passwd, up to the start posn of the change.
 729         int i;
 730         const char * p = passwd;
 731         for (i = 0; i < cbs->startPos; ++i)
 732             *dest++ = *p++;
 733
 734         // Copy the text to be inserted).
 735         if (insert)
 736             while (*insert)
 737                 *dest++ = *insert++;
 738
 739         // Finally, copy into newS any remaining text from passwd[endPos] on.
 740         for (p = passwd + cbs->endPos; *p; )
 741             *dest++ = *p++;
 742         *dest = 0;
 743
 744         value = newS;
 745
 746         delete[] newS;
 747     }
 748 }
 749
 750 static void
 751 wxTextWindowChangedProc (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 752 {
 753     if (!wxGetWindowFromTable(w))
 754         // Widget has been deleted!
 755         return;
 756
 757     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 758     tw->SetModified(true);
 759 }
 760
 761 static void
 762 wxTextWindowModifyProc (Widget WXUNUSED(w), XtPointer clientData, XmTextVerifyCallbackStruct *cbs)
 763 {
 764     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 765     tw->m_processedDefault = false;
 766
 767     // First, do some stuff if it's a password control: in this case, we need
 768     // to store the string inside the class because GetValue() can't retrieve
 769     // it from the text ctrl. We do *not* do it in other circumstances because
 770     // it would double the amount of memory needed.
 771
 772     if ( tw->GetWindowStyleFlag() & wxTE_PASSWORD )
 773     {
 774         MergeChangesIntoString(tw->m_value, cbs);
 775
 776         if ( cbs->text->length > 0 )
 777         {
 778             int i;
 779             for (i = 0; i < cbs->text->length; ++i)
 780                 cbs->text->ptr[i] = '*';
 781             cbs->text->ptr[i] = '\0';
 782         }
 783     }
 784
 785     if(tw->InSetValue())
 786         return;
 787
 788     // If we're already within an OnChar, return: probably a programmatic
 789     // insertion.
 790     if (tw->m_tempCallbackStruct)
 791         return;
 792
 793     // Check for a backspace
 794     if (cbs->startPos == (cbs->currInsert - 1))
 795     {
 796         tw->DoSendEvents((void *)cbs, WXK_DELETE);
 797
 798         return;
 799     }
 800
 801     // Pasting operation: let it through without calling OnChar
 802     if (cbs->text->length > 1)
 803         return;
 804
 805     // Something other than text
 806     if (cbs->text->ptr == NULL)
 807         return;
 808
 809     // normal key press
 810     char ch = cbs->text->ptr[0];
 811     tw->DoSendEvents((void *)cbs, ch == '\n' ? '\r' : ch);
 812 }
 813
 814 static void
 815 wxTextWindowGainFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 816 {
 817     if (!wxGetWindowFromTable(w))
 818         return;
 819
 820     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 821     wxFocusEvent event(wxEVT_SET_FOCUS, tw->GetId());
 822     event.SetEventObject(tw);
 823     tw->GetEventHandler()->ProcessEvent(event);
 824 }
 825
 826 static void
 827 wxTextWindowLoseFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 828 {
 829     if (!wxGetWindowFromTable(w))
 830         return;
 831
 832     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 833     wxFocusEvent event(wxEVT_KILL_FOCUS, tw->GetId());
 834     event.SetEventObject(tw);
 835     tw->GetEventHandler()->ProcessEvent(event);
 836 }
 837
 838 static void wxTextWindowActivateProc(Widget w, XtPointer clientData,
 839                                      XmAnyCallbackStruct *WXUNUSED(ptr))
 840 {
 841     if (!wxGetWindowFromTable(w))
 842         return;
 843
 844     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 845
 846     if (tw->InSetValue())
 847         return;
 848
 849     wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER);
 850     event.SetId(tw->GetId());
 851     event.SetEventObject(tw);
 852     tw->ProcessCommand(event);
 853 }
 854
 855 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
 856 {
 857     Cut();
 858 }
 859
 860 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
 861 {
 862     Copy();
 863 }
 864
 865 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
 866 {
 867     Paste();
 868 }
 869
 870 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
 871 {
 872     Undo();
 873 }
 874
 875 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
 876 {
 877     Redo();
 878 }
 879
 880 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
 881 {
 882     event.Enable( CanCut() );
 883 }
 884
 885 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
 886 {
 887     event.Enable( CanCopy() );
 888 }
 889
 890 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
 891 {
 892     event.Enable( CanPaste() );
 893 }
 894
 895 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
 896 {
 897     event.Enable( CanUndo() );
 898 }
 899
 900 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
 901 {
 902     event.Enable( CanRedo() );
 903 }