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