src/motif/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/motif/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 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __VMS
  24 #define XtParent XTPARENT
  25 #endif
  26
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <ctype.h>
  30
  31 #include "wx/textctrl.h"
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/utils.h"
  35     #include "wx/settings.h"
  36 #endif
  37
  38 #include "wx/filefn.h"
  39
  40 #ifdef __VMS__
  41 #pragma message disable nosimpint
  42 #endif
  43 #include <Xm/Text.h>
  44 #ifdef __VMS__
  45 #pragma message enable nosimpint
  46 #endif
  47
  48 #include "wx/motif/private.h"
  49
  50 // ----------------------------------------------------------------------------
  51 // private functions
  52 // ----------------------------------------------------------------------------
  53
  54 // helper: inserts the new text in the value of the text ctrl and returns the
  55 // result in place
  56 static void MergeChangesIntoString(wxString& value,
  57                                    XmTextVerifyCallbackStruct *textStruct);
  58
  59 // callbacks
  60 static void wxTextWindowChangedProc(Widget w, XtPointer clientData, XtPointer ptr);
  61 static void wxTextWindowModifyProc(Widget w, XtPointer clientData, XmTextVerifyCallbackStruct *cbs);
  62 static void wxTextWindowGainFocusProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs);
  63 static void wxTextWindowLoseFocusProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs);
  64 static void wxTextWindowActivateProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *ptr);
  65
  66     IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxTextCtrlBase)
  67
  68     BEGIN_EVENT_TABLE(wxTextCtrl, wxTextCtrlBase)
  69         EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  70         EVT_CHAR(wxTextCtrl::OnChar)
  71
  72     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
  73     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
  74     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
  75     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
  76     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
  77
  78     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
  79     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
  80     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
  81     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
  82     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
  83
  84     END_EVENT_TABLE()
  85
  86 // ============================================================================
  87 // implementation
  88 // ============================================================================
  89
  90 // ----------------------------------------------------------------------------
  91 // wxTextCtrl
  92 // ----------------------------------------------------------------------------
  93
  94 // Text item
  95 wxTextCtrl::wxTextCtrl()
  96 {
  97     m_tempCallbackStruct = (void*) NULL;
  98     m_modified = false;
  99     m_processedDefault = false;
 100 }
 101
 102 bool wxTextCtrl::Create(wxWindow *parent,
 103                         wxWindowID id,
 104                         const wxString& value,
 105                         const wxPoint& pos,
 106                         const wxSize& size,
 107                         long style,
 108                         const wxValidator& validator,
 109                         const wxString& name)
 110 {
 111     if( !CreateControl( parent, id, pos, size, style, validator, name ) )
 112         return false;
 113
 114     m_tempCallbackStruct = (void*) NULL;
 115     m_modified = false;
 116     m_processedDefault = false;
 117
 118     m_backgroundColour = *wxWHITE;
 119
 120     Widget parentWidget = (Widget) parent->GetClientWidget();
 121
 122     Bool wantHorizScroll = (m_windowStyle & wxHSCROLL) != 0 ? True : False;
 123     // If we don't have horizontal scrollbars, we want word wrap.
 124     // OpenMotif 2.1 crashes if wantWordWrap is True in Japanese
 125     // locale (and probably other multibyte locales). The check might be
 126     // more precise
 127 #if wxCHECK_LESSTIF() || wxCHECK_MOTIF_VERSION( 2, 2 )
 128     Bool wantWordWrap = wantHorizScroll == True ? False : True;
 129 #else
 130     Bool wantWordWrap = False;
 131 #endif
 132
 133     if (m_windowStyle & wxTE_MULTILINE)
 134     {
 135         Arg args[8];
 136         int count = 0;
 137         XtSetArg (args[count], XmNscrollHorizontal, wantHorizScroll); ++count;
 138         XtSetArg (args[count], (String) wxFont::GetFontTag(),
 139                   m_font.GetFontType( XtDisplay(parentWidget) ) ); ++count;
 140         XtSetArg (args[count], XmNwordWrap, wantWordWrap); ++count;
 141         XtSetArg (args[count], XmNvalue, value.c_str()); ++count;
 142         XtSetArg (args[count], XmNeditable,
 143                   style & wxTE_READONLY ? False : True); ++count;
 144         XtSetArg (args[count], XmNeditMode, XmMULTI_LINE_EDIT ); ++count;
 145
 146         m_mainWidget =
 147             (WXWidget) XmCreateScrolledText(parentWidget,
 148                                             wxConstCast(name.c_str(), char),
 149                                             args, count);
 150
 151         XtManageChild ((Widget) m_mainWidget);
 152     }
 153     else
 154     {
 155         m_mainWidget = (WXWidget)XtVaCreateManagedWidget
 156                                  (
 157                                   wxConstCast(name.c_str(), char),
 158                                   xmTextWidgetClass,
 159                                   parentWidget,
 160                                   wxFont::GetFontTag(), m_font.GetFontType( XtDisplay(parentWidget) ),
 161                                   XmNvalue, value.c_str(),
 162                                   XmNeditable, (style & wxTE_READONLY) ?
 163                                       False : True,
 164                                   NULL
 165                                  );
 166
 167 #if 0
 168         // TODO: Is this relevant? What does it do?
 169         int noCols = 2;
 170         if (!value.IsNull() && (value.length() > (unsigned int) noCols))
 171             noCols = value.length();
 172         XtVaSetValues((Widget) m_mainWidget,
 173                       XmNcolumns, noCols,
 174                       NULL);
 175 #endif
 176     }
 177
 178     // remove border if asked for
 179     if ( style & wxNO_BORDER )
 180     {
 181         XtVaSetValues((Widget)m_mainWidget,
 182                       XmNshadowThickness, 0,
 183                       NULL);
 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     AttachWidget (parent, m_mainWidget, (WXWidget) NULL,
 198                   pos.x, pos.y, size.x, size.y);
 199
 200     ChangeBackgroundColour();
 201
 202     return true;
 203 }
 204
 205 WXWidget wxTextCtrl::GetTopWidget() const
 206 {
 207     return IsMultiLine() ? (WXWidget)XtParent((Widget)m_mainWidget)
 208                          : m_mainWidget;
 209 }
 210
 211 wxString wxTextCtrl::GetValue() const
 212 {
 213     wxString str; // result
 214
 215     if (m_windowStyle & wxTE_PASSWORD)
 216     {
 217         // the value is stored always in m_value because it can't be retrieved
 218         // from the text control
 219         str = m_value;
 220     }
 221     else
 222     {
 223         // just get the string from Motif
 224         char *s = XmTextGetString ((Widget) m_mainWidget);
 225         if ( s )
 226         {
 227             str = s;
 228             XtFree (s);
 229         }
 230         //else: return empty string
 231
 232         if ( m_tempCallbackStruct )
 233         {
 234             // the string in the control isn't yet updated, can't use it as is
 235             MergeChangesIntoString(str, (XmTextVerifyCallbackStruct *)
 236                                    m_tempCallbackStruct);
 237         }
 238     }
 239
 240     return str;
 241 }
 242
 243 void wxTextCtrl::DoSetValue(const wxString& text, int flags)
 244 {
 245     m_inSetValue = true;
 246
 247     XmTextSetString ((Widget) m_mainWidget, wxConstCast(text.c_str(), char));
 248     XtVaSetValues ((Widget) m_mainWidget,
 249                    XmNcursorPosition, text.length(),
 250                    NULL);
 251
 252     SetInsertionPoint(text.length());
 253     XmTextShowPosition ((Widget) m_mainWidget, text.length());
 254     m_modified = true;
 255
 256     m_inSetValue = false;
 257
 258     if ( flags & SetValue_SendEvent )
 259         SendTextUpdatedEvent();
 260 }
 261
 262 // Clipboard operations
 263 void wxTextCtrl::Copy()
 264 {
 265     XmTextCopy((Widget) m_mainWidget, CurrentTime);
 266 }
 267
 268 void wxTextCtrl::Cut()
 269 {
 270     XmTextCut((Widget) m_mainWidget, CurrentTime);
 271 }
 272
 273 void wxTextCtrl::Paste()
 274 {
 275     XmTextPaste((Widget) m_mainWidget);
 276 }
 277
 278 bool wxTextCtrl::CanCopy() const
 279 {
 280     // Can copy if there's a selection
 281     long from, to;
 282     GetSelection(& from, & to);
 283     return (from != to) ;
 284 }
 285
 286 bool wxTextCtrl::CanCut() const
 287 {
 288     // Can cut if there's a selection
 289     long from, to;
 290     GetSelection(& from, & to);
 291     return (from != to) && (IsEditable());
 292 }
 293
 294 bool wxTextCtrl::CanPaste() const
 295 {
 296     return IsEditable() ;
 297 }
 298
 299 // Undo/redo
 300 void wxTextCtrl::Undo()
 301 {
 302     // Not possible in Motif
 303 }
 304
 305 void wxTextCtrl::Redo()
 306 {
 307     // Not possible in Motif
 308 }
 309
 310 bool wxTextCtrl::CanUndo() const
 311 {
 312     // No Undo in Motif
 313     return false;
 314 }
 315
 316 bool wxTextCtrl::CanRedo() const
 317 {
 318     // No Redo in Motif
 319     return false;
 320 }
 321
 322 // If the return values from and to are the same, there is no
 323 // selection.
 324 void wxTextCtrl::GetSelection(long* from, long* to) const
 325 {
 326     XmTextPosition left, right;
 327
 328     XmTextGetSelectionPosition((Widget) m_mainWidget, & left, & right);
 329
 330     *from = (long) left;
 331     *to = (long) right;
 332 }
 333
 334 bool wxTextCtrl::IsEditable() const
 335 {
 336     return (XmTextGetEditable((Widget) m_mainWidget) != 0);
 337 }
 338
 339 void wxTextCtrl::SetEditable(bool editable)
 340 {
 341     XmTextSetEditable((Widget) m_mainWidget, (Boolean) editable);
 342 }
 343
 344 void wxTextCtrl::SetInsertionPoint(long pos)
 345 {
 346     XmTextSetInsertionPosition ((Widget) m_mainWidget, (XmTextPosition) pos);
 347 }
 348
 349 void wxTextCtrl::SetInsertionPointEnd()
 350 {
 351     wxTextPos pos = GetLastPosition();
 352     SetInsertionPoint(pos);
 353 }
 354
 355 long wxTextCtrl::GetInsertionPoint() const
 356 {
 357     return (long) XmTextGetInsertionPosition ((Widget) m_mainWidget);
 358 }
 359
 360 wxTextPos wxTextCtrl::GetLastPosition() const
 361 {
 362     return (long) XmTextGetLastPosition ((Widget) m_mainWidget);
 363 }
 364
 365 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 366 {
 367     XmTextReplace ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 368         wxConstCast(value.c_str(), char));
 369 }
 370
 371 void wxTextCtrl::Remove(long from, long to)
 372 {
 373     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 374                       (Time) 0);
 375     XmTextRemove ((Widget) m_mainWidget);
 376 }
 377
 378 void wxTextCtrl::SetSelection(long from, long to)
 379 {
 380     if( to == -1 )
 381         to = GetLastPosition();
 382
 383     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 384                       (Time) 0);
 385 }
 386
 387 void wxTextCtrl::WriteText(const wxString& text)
 388 {
 389     long textPosition = GetInsertionPoint() + text.length();
 390     XmTextInsert ((Widget) m_mainWidget, GetInsertionPoint(),
 391                   wxConstCast(text.c_str(), char));
 392     XtVaSetValues ((Widget) m_mainWidget, XmNcursorPosition, textPosition, NULL);
 393     SetInsertionPoint(textPosition);
 394     XmTextShowPosition ((Widget) m_mainWidget, textPosition);
 395     m_modified = true;
 396 }
 397
 398 void wxTextCtrl::AppendText(const wxString& text)
 399 {
 400     wxTextPos textPosition = GetLastPosition() + text.length();
 401     XmTextInsert ((Widget) m_mainWidget, GetLastPosition(),
 402                   wxConstCast(text.c_str(), char));
 403     XtVaSetValues ((Widget) m_mainWidget, XmNcursorPosition, textPosition, NULL);
 404     SetInsertionPoint(textPosition);
 405     XmTextShowPosition ((Widget) m_mainWidget, textPosition);
 406     m_modified = true;
 407 }
 408
 409 void wxTextCtrl::Clear()
 410 {
 411     XmTextSetString ((Widget) m_mainWidget, wxMOTIF_STR(""));
 412     m_modified = false;
 413 }
 414
 415 bool wxTextCtrl::IsModified() const
 416 {
 417     return m_modified;
 418 }
 419
 420 // Makes modified or unmodified
 421 void wxTextCtrl::MarkDirty()
 422 {
 423     m_modified = true;
 424 }
 425
 426 void wxTextCtrl::DiscardEdits()
 427 {
 428     m_modified = false;
 429 }
 430
 431 int wxTextCtrl::GetNumberOfLines() const
 432 {
 433     // HIDEOUSLY inefficient, but we have no choice.
 434     char *s = XmTextGetString ((Widget) m_mainWidget);
 435     if (s)
 436     {
 437         long i = 0;
 438         int currentLine = 0;
 439         bool finished = false;
 440         while (!finished)
 441         {
 442             int ch = s[i];
 443             if (ch == '\n')
 444             {
 445                 currentLine++;
 446                 i++;
 447             }
 448             else if (ch == 0)
 449             {
 450                 finished = true;
 451             }
 452             else
 453                 i++;
 454         }
 455
 456         XtFree (s);
 457         return currentLine;
 458     }
 459     return 0;
 460 }
 461
 462 long wxTextCtrl::XYToPosition(long x, long y) const
 463 {
 464 /* It seems, that there is a bug in some versions of the Motif library,
 465     so the original wxWin-Code doesn't work. */
 466     /*
 467     Widget textWidget = (Widget) handle;
 468     return (long) XmTextXYToPos (textWidget, (Position) x, (Position) y);
 469     */
 470     /* Now a little workaround: */
 471     long r=0;
 472     for (int i=0; i<y; i++) r+=(GetLineLength(i)+1);
 473     return r+x;
 474 }
 475
 476 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 477 {
 478     Position xx, yy;
 479     XmTextPosToXY((Widget) m_mainWidget, pos, &xx, &yy);
 480     if ( x )
 481         *x = xx;
 482     if ( y )
 483         *y = yy;
 484
 485     return true;
 486 }
 487
 488 void wxTextCtrl::ShowPosition(long pos)
 489 {
 490     XmTextShowPosition ((Widget) m_mainWidget, (XmTextPosition) pos);
 491 }
 492
 493 int wxTextCtrl::GetLineLength(long lineNo) const
 494 {
 495     wxString str = GetLineText (lineNo);
 496     return (int) str.length();
 497 }
 498
 499 wxString wxTextCtrl::GetLineText(long lineNo) const
 500 {
 501     // HIDEOUSLY inefficient, but we have no choice.
 502     char *s = XmTextGetString ((Widget) m_mainWidget);
 503
 504     if (s)
 505     {
 506         wxString buf;
 507         long i;
 508         int currentLine = 0;
 509         for (i = 0; currentLine != lineNo && s[i]; i++ )
 510             if (s[i] == '\n')
 511                 currentLine++;
 512             // Now get the text
 513             int j;
 514             for (j = 0; s[i] && s[i] != '\n'; i++, j++ )
 515                 buf += s[i];
 516
 517             XtFree(s);
 518             return buf;
 519     }
 520     else
 521         return wxEmptyString;
 522 }
 523
 524 /*
 525 * Text item
 526 */
 527
 528 void wxTextCtrl::Command(wxCommandEvent & event)
 529 {
 530     SetValue (event.GetString());
 531     ProcessCommand (event);
 532 }
 533
 534 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 535 {
 536     // By default, load the first file into the text window.
 537     if (event.GetNumberOfFiles() > 0)
 538     {
 539         LoadFile(event.GetFiles()[0]);
 540     }
 541 }
 542
 543 void wxTextCtrl::OnChar(wxKeyEvent& event)
 544 {
 545     // Indicates that we should generate a normal command, because
 546     // we're letting default behaviour happen (otherwise it's vetoed
 547     // by virtue of overriding OnChar)
 548     m_processedDefault = true;
 549
 550     if (m_tempCallbackStruct)
 551     {
 552         XmTextVerifyCallbackStruct *textStruct =
 553             (XmTextVerifyCallbackStruct *) m_tempCallbackStruct;
 554         textStruct->doit = True;
 555         if (isascii(event.m_keyCode) && (textStruct->text->length == 1))
 556         {
 557             textStruct->text->ptr[0] = (char)((event.m_keyCode == WXK_RETURN) ? 10 : event.m_keyCode);
 558         }
 559     }
 560 }
 561
 562 void wxTextCtrl::ChangeFont(bool keepOriginalSize)
 563 {
 564     wxWindow::ChangeFont(keepOriginalSize);
 565 }
 566
 567 void wxTextCtrl::ChangeBackgroundColour()
 568 {
 569     wxWindow::ChangeBackgroundColour();
 570
 571     /* TODO: should scrollbars be affected? Should probably have separate
 572     * function to change them (by default, taken from wxSystemSettings)
 573     */
 574     if (m_windowStyle & wxTE_MULTILINE)
 575     {
 576         Widget parent = XtParent ((Widget) m_mainWidget);
 577         Widget hsb, vsb;
 578
 579         XtVaGetValues (parent,
 580             XmNhorizontalScrollBar, &hsb,
 581             XmNverticalScrollBar, &vsb,
 582             NULL);
 583         wxColour backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
 584         if (hsb)
 585             wxDoChangeBackgroundColour((WXWidget) hsb, backgroundColour, true);
 586         if (vsb)
 587             wxDoChangeBackgroundColour((WXWidget) vsb, backgroundColour, true);
 588
 589         // MBN: why change parent background?
 590         // DoChangeBackgroundColour((WXWidget) parent, m_backgroundColour, true);
 591     }
 592 }
 593
 594 void wxTextCtrl::ChangeForegroundColour()
 595 {
 596     wxWindow::ChangeForegroundColour();
 597
 598     if (m_windowStyle & wxTE_MULTILINE)
 599     {
 600         Widget parent = XtParent ((Widget) m_mainWidget);
 601         Widget hsb, vsb;
 602
 603         XtVaGetValues (parent,
 604             XmNhorizontalScrollBar, &hsb,
 605             XmNverticalScrollBar, &vsb,
 606             NULL);
 607
 608             /* TODO: should scrollbars be affected? Should probably have separate
 609             * function to change them (by default, taken from wxSystemSettings)
 610             if (hsb)
 611             DoChangeForegroundColour((WXWidget) hsb, m_foregroundColour);
 612             if (vsb)
 613             DoChangeForegroundColour((WXWidget) vsb, m_foregroundColour);
 614         */
 615         wxDoChangeForegroundColour((WXWidget) parent, m_foregroundColour);
 616     }
 617 }
 618
 619 void wxTextCtrl::DoSendEvents(void *wxcbs, long keycode)
 620 {
 621     // we're in process of updating the text control
 622     m_tempCallbackStruct = wxcbs;
 623
 624     XmTextVerifyCallbackStruct *cbs = (XmTextVerifyCallbackStruct *)wxcbs;
 625
 626     wxKeyEvent event (wxEVT_CHAR);
 627     event.SetId(GetId());
 628     event.m_keyCode = keycode;
 629     event.SetEventObject(this);
 630
 631     // Only if wxTextCtrl::OnChar is called will this be set to True (and
 632     // the character passed through)
 633     cbs->doit = False;
 634
 635     GetEventHandler()->ProcessEvent(event);
 636
 637     if ( !InSetValue() && m_processedDefault )
 638     {
 639         // Can generate a command
 640         wxCommandEvent commandEvent(wxEVT_COMMAND_TEXT_UPDATED, GetId());
 641         commandEvent.SetEventObject(this);
 642         ProcessCommand(commandEvent);
 643     }
 644
 645     // do it after the (user) event handlers processed the events because
 646     // otherwise GetValue() would return incorrect (not yet updated value)
 647     m_tempCallbackStruct = NULL;
 648 }
 649
 650 wxSize wxDoGetSingleTextCtrlBestSize( Widget textWidget,
 651                                       const wxWindow* window )
 652 {
 653     Dimension xmargin, ymargin, highlight, shadow;
 654     char* value;
 655
 656     XtVaGetValues( textWidget,
 657                    XmNmarginWidth, &xmargin,
 658                    XmNmarginHeight, &ymargin,
 659                    XmNvalue, &value,
 660                    XmNhighlightThickness, &highlight,
 661                    XmNshadowThickness, &shadow,
 662                    NULL );
 663
 664     if( !value )
 665         value = wxMOTIF_STR("|");
 666
 667     int x, y;
 668     window->GetTextExtent( value, &x, &y );
 669
 670     if( x < 100 )
 671         x = 100;
 672
 673     return wxSize( x + 2 * xmargin + 2 * highlight + 2 * shadow,
 674                    // MBN: +2 necessary: Lesstif bug or mine?
 675                    y + 2 * ymargin + 2 * highlight + 2 * shadow + 2 );
 676 }
 677
 678 wxSize wxTextCtrl::DoGetBestSize() const
 679 {
 680     if( IsSingleLine() )
 681     {
 682         wxSize best = wxControl::DoGetBestSize();
 683
 684         if( best.x < 110 ) best.x = 110;
 685
 686         return best;
 687     }
 688     else
 689         return wxWindow::DoGetBestSize();
 690 }
 691
 692 // ----------------------------------------------------------------------------
 693 // helpers and Motif callbacks
 694 // ----------------------------------------------------------------------------
 695
 696 static void MergeChangesIntoString(wxString& value,
 697                                    XmTextVerifyCallbackStruct *cbs)
 698 {
 699     /* _sm_
 700      * At least on my system (SunOS 4.1.3 + Motif 1.2), you need to think of
 701      * every event as a replace event.  cbs->text->ptr gives the replacement
 702      * text, cbs->startPos gives the index of the first char affected by the
 703      * replace, and cbs->endPos gives the index one more than the last char
 704      * affected by the replace (startPos == endPos implies an empty range).
 705      * Hence, a deletion is represented by replacing all input text with a
 706      * blank string ("", *not* NULL!).  A simple insertion that does not
 707      * overwrite any text has startPos == endPos.
 708      */
 709
 710     if ( !value )
 711     {
 712         // easy case: the ol value was empty
 713         value = cbs->text->ptr;
 714     }
 715     else
 716     {
 717         // merge the changes into the value
 718         const char * const passwd = value;
 719         int len = value.length();
 720
 721         len += ( cbs->text->ptr ?
 722                  strlen(cbs->text->ptr) :
 723                  0 ) + 1;                      // + new text (if any) + NUL
 724         len -= cbs->endPos - cbs->startPos;    // - text from affected region.
 725
 726         char * newS = new char [len];
 727         char * dest = newS,
 728              * insert = cbs->text->ptr;
 729
 730         // Copy (old) text from passwd, up to the start posn of the change.
 731         int i;
 732         const char * p = passwd;
 733         for (i = 0; i < cbs->startPos; ++i)
 734             *dest++ = *p++;
 735
 736         // Copy the text to be inserted).
 737         if (insert)
 738             while (*insert)
 739                 *dest++ = *insert++;
 740
 741         // Finally, copy into newS any remaining text from passwd[endPos] on.
 742         for (p = passwd + cbs->endPos; *p; )
 743             *dest++ = *p++;
 744         *dest = 0;
 745
 746         value = newS;
 747
 748         delete[] newS;
 749     }
 750 }
 751
 752 static void
 753 wxTextWindowChangedProc (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 754 {
 755     if (!wxGetWindowFromTable(w))
 756         // Widget has been deleted!
 757         return;
 758
 759     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 760     tw->SetModified(true);
 761 }
 762
 763 static void
 764 wxTextWindowModifyProc (Widget WXUNUSED(w), XtPointer clientData, XmTextVerifyCallbackStruct *cbs)
 765 {
 766     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 767     tw->m_processedDefault = false;
 768
 769     // First, do some stuff if it's a password control: in this case, we need
 770     // to store the string inside the class because GetValue() can't retrieve
 771     // it from the text ctrl. We do *not* do it in other circumstances because
 772     // it would double the amount of memory needed.
 773
 774     if ( tw->GetWindowStyleFlag() & wxTE_PASSWORD )
 775     {
 776         MergeChangesIntoString(tw->m_value, cbs);
 777
 778         if ( cbs->text->length > 0 )
 779         {
 780             int i;
 781             for (i = 0; i < cbs->text->length; ++i)
 782                 cbs->text->ptr[i] = '*';
 783             cbs->text->ptr[i] = '\0';
 784         }
 785     }
 786
 787     if(tw->InSetValue())
 788         return;
 789
 790     // If we're already within an OnChar, return: probably a programmatic
 791     // insertion.
 792     if (tw->m_tempCallbackStruct)
 793         return;
 794
 795     // Check for a backspace
 796     if (cbs->startPos == (cbs->currInsert - 1))
 797     {
 798         tw->DoSendEvents((void *)cbs, WXK_DELETE);
 799
 800         return;
 801     }
 802
 803     // Pasting operation: let it through without calling OnChar
 804     if (cbs->text->length > 1)
 805         return;
 806
 807     // Something other than text
 808     if (cbs->text->ptr == NULL)
 809         return;
 810
 811     // normal key press
 812     char ch = cbs->text->ptr[0];
 813     tw->DoSendEvents((void *)cbs, ch == '\n' ? '\r' : ch);
 814 }
 815
 816 static void
 817 wxTextWindowGainFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 818 {
 819     if (!wxGetWindowFromTable(w))
 820         return;
 821
 822     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 823     wxFocusEvent event(wxEVT_SET_FOCUS, tw->GetId());
 824     event.SetEventObject(tw);
 825     tw->GetEventHandler()->ProcessEvent(event);
 826 }
 827
 828 static void
 829 wxTextWindowLoseFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 830 {
 831     if (!wxGetWindowFromTable(w))
 832         return;
 833
 834     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 835     wxFocusEvent event(wxEVT_KILL_FOCUS, tw->GetId());
 836     event.SetEventObject(tw);
 837     tw->GetEventHandler()->ProcessEvent(event);
 838 }
 839
 840 static void wxTextWindowActivateProc(Widget w, XtPointer clientData,
 841                                      XmAnyCallbackStruct *WXUNUSED(ptr))
 842 {
 843     if (!wxGetWindowFromTable(w))
 844         return;
 845
 846     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 847
 848     if (tw->InSetValue())
 849         return;
 850
 851     wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER);
 852     event.SetId(tw->GetId());
 853     event.SetEventObject(tw);
 854     tw->ProcessCommand(event);
 855 }
 856
 857 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
 858 {
 859     Cut();
 860 }
 861
 862 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
 863 {
 864     Copy();
 865 }
 866
 867 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
 868 {
 869     Paste();
 870 }
 871
 872 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
 873 {
 874     Undo();
 875 }
 876
 877 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
 878 {
 879     Redo();
 880 }
 881
 882 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
 883 {
 884     event.Enable( CanCut() );
 885 }
 886
 887 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
 888 {
 889     event.Enable( CanCopy() );
 890 }
 891
 892 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
 893 {
 894     event.Enable( CanPaste() );
 895 }
 896
 897 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
 898 {
 899     event.Enable( CanUndo() );
 900 }
 901
 902 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
 903 {
 904     event.Enable( CanRedo() );
 905 }