src/gtk1/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        textctrl.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Vadim Zeitlin
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "textctrl.h"
  12 #endif
  13
  14 #include "wx/textctrl.h"
  15 #include "wx/utils.h"
  16 #include "wx/intl.h"
  17 #include "wx/log.h"
  18 #include "wx/settings.h"
  19 #include "wx/panel.h"
  20
  21 #include <sys/types.h>
  22 #include <sys/stat.h>
  23 #include <ctype.h>
  24 #include <math.h>               // for fabs
  25
  26 #include "gdk/gdk.h"
  27 #include "gtk/gtk.h"
  28 #include "gdk/gdkkeysyms.h"
  29
  30 //-----------------------------------------------------------------------------
  31 // idle system
  32 //-----------------------------------------------------------------------------
  33
  34 extern void wxapp_install_idle_handler();
  35 extern bool g_isIdle;
  36
  37 //-----------------------------------------------------------------------------
  38 // data
  39 //-----------------------------------------------------------------------------
  40
  41 extern bool       g_blockEventsOnDrag;
  42 extern wxCursor   g_globalCursor;
  43
  44 //-----------------------------------------------------------------------------
  45 //  "changed"
  46 //-----------------------------------------------------------------------------
  47
  48 static void
  49 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
  50 {
  51     if (!win->m_hasVMT) return;
  52
  53     if (g_isIdle)
  54         wxapp_install_idle_handler();
  55
  56     win->SetModified();
  57     win->UpdateFontIfNeeded();
  58
  59     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
  60     event.SetString( win->GetValue() );
  61     event.SetEventObject( win );
  62     win->GetEventHandler()->ProcessEvent( event );
  63 }
  64
  65 //-----------------------------------------------------------------------------
  66 // "changed" from vertical scrollbar
  67 //-----------------------------------------------------------------------------
  68
  69 static void
  70 gtk_scrollbar_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
  71 {
  72     if (!win->m_hasVMT) return;
  73
  74     if (g_isIdle)
  75         wxapp_install_idle_handler();
  76
  77     win->CalculateScrollbar();
  78 }
  79
  80 //-----------------------------------------------------------------------------
  81 // "focus_in_event"
  82 //-----------------------------------------------------------------------------
  83
  84 extern wxWindow  *g_focusWindow;
  85 extern bool       g_blockEventsOnDrag;
  86 // extern bool g_isIdle;
  87
  88 static gint gtk_text_focus_in_callback( GtkWidget *widget, GdkEvent *WXUNUSED(event), wxWindow *win )
  89 {
  90     // Necessary?
  91 #if 0
  92     if (g_isIdle)
  93         wxapp_install_idle_handler();
  94 #endif
  95     if (!win->m_hasVMT) return FALSE;
  96     if (g_blockEventsOnDrag) return FALSE;
  97
  98     g_focusWindow = win;
  99
 100     // notify the parent that we got the focus
 101     wxChildFocusEvent eventFocus(win);
 102     (void)win->GetEventHandler()->ProcessEvent(eventFocus);
 103
 104 #ifdef HAVE_XIM
 105     if (win->m_ic)
 106         gdk_im_begin(win->m_ic, win->m_wxwindow->window);
 107 #endif
 108
 109 #if 0
 110 #ifdef wxUSE_CARET
 111     // caret needs to be informed about focus change
 112     wxCaret *caret = win->GetCaret();
 113     if ( caret )
 114     {
 115         caret->OnSetFocus();
 116     }
 117 #endif // wxUSE_CARET
 118 #endif
 119
 120     wxFocusEvent event( wxEVT_SET_FOCUS, win->GetId() );
 121     event.SetEventObject( win );
 122
 123     if (win->GetEventHandler()->ProcessEvent( event ))
 124     {
 125         return TRUE;
 126     }
 127
 128     return FALSE;
 129 }
 130
 131 //-----------------------------------------------------------------------------
 132 // "focus_out_event"
 133 //-----------------------------------------------------------------------------
 134
 135 static gint gtk_text_focus_out_callback( GtkWidget *widget, GdkEvent *WXUNUSED(event), wxWindow *win )
 136 {
 137 #if 0
 138     if (g_isIdle)
 139         wxapp_install_idle_handler();
 140 #endif
 141
 142     if (!win->m_hasVMT) return FALSE;
 143     if (g_blockEventsOnDrag) return FALSE;
 144
 145 #if 0
 146     // if the focus goes out of our app alltogether, OnIdle() will send
 147     // wxActivateEvent, otherwise gtk_window_focus_in_callback() will reset
 148     // g_sendActivateEvent to -1
 149     g_sendActivateEvent = 0;
 150 #endif
 151
 152     wxWindow *winFocus = wxFindFocusedChild(win);
 153     if ( winFocus )
 154         win = winFocus;
 155
 156     g_focusWindow = (wxWindow *)NULL;
 157
 158 #ifdef HAVE_XIM
 159     if (win->m_ic)
 160         gdk_im_end();
 161 #endif
 162
 163 #if 0
 164 #ifdef wxUSE_CARET
 165     // caret needs to be informed about focus change
 166     wxCaret *caret = win->GetCaret();
 167     if ( caret )
 168     {
 169         caret->OnKillFocus();
 170     }
 171 #endif // wxUSE_CARET
 172 #endif
 173
 174     wxFocusEvent event( wxEVT_KILL_FOCUS, win->GetId() );
 175     event.SetEventObject( win );
 176
 177     if (win->GetEventHandler()->ProcessEvent( event ))
 178     {
 179         return TRUE;
 180     }
 181
 182     return FALSE;
 183 }
 184
 185 //-----------------------------------------------------------------------------
 186 //  wxTextCtrl
 187 //-----------------------------------------------------------------------------
 188
 189 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl,wxControl)
 190
 191 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 192     EVT_CHAR(wxTextCtrl::OnChar)
 193
 194     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 195     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 196     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 197     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 198     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 199
 200     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 201     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 202     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 203     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 204     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 205 END_EVENT_TABLE()
 206
 207 void wxTextCtrl::Init()
 208 {
 209     m_modified = FALSE;
 210     m_updateFont = FALSE;
 211     m_text =
 212     m_vScrollbar = (GtkWidget *)NULL;
 213 }
 214
 215 wxTextCtrl::wxTextCtrl( wxWindow *parent,
 216                         wxWindowID id,
 217                         const wxString &value,
 218                         const wxPoint &pos,
 219                         const wxSize &size,
 220                         long style,
 221                         const wxValidator& validator,
 222                         const wxString &name )
 223 {
 224     Init();
 225
 226     Create( parent, id, value, pos, size, style, validator, name );
 227 }
 228
 229 bool wxTextCtrl::Create( wxWindow *parent,
 230                          wxWindowID id,
 231                          const wxString &value,
 232                          const wxPoint &pos,
 233                          const wxSize &size,
 234                          long style,
 235                          const wxValidator& validator,
 236                          const wxString &name )
 237 {
 238     m_needParent = TRUE;
 239     m_acceptsFocus = TRUE;
 240
 241     if (!PreCreation( parent, pos, size ) ||
 242         !CreateBase( parent, id, pos, size, style, validator, name ))
 243     {
 244         wxFAIL_MSG( wxT("wxTextCtrl creation failed") );
 245         return FALSE;
 246     }
 247
 248
 249     m_vScrollbarVisible = FALSE;
 250
 251     bool multi_line = (style & wxTE_MULTILINE) != 0;
 252     if (multi_line)
 253     {
 254 #if (GTK_MINOR_VERSION > 2)
 255         /* a multi-line edit control: create a vertical scrollbar by default and
 256            horizontal if requested */
 257         bool bHasHScrollbar = (style & wxHSCROLL) != 0;
 258 #else
 259         bool bHasHScrollbar = FALSE;
 260 #endif
 261
 262         /* create our control ... */
 263         m_text = gtk_text_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
 264
 265         /* ... and put into the upper left hand corner of the table */
 266         m_widget = gtk_table_new(bHasHScrollbar ? 2 : 1, 2, FALSE);
 267         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 268         gtk_table_attach( GTK_TABLE(m_widget), m_text, 0, 1, 0, 1,
 269                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 270                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 271                        0, 0);
 272
 273         /* always wrap words */
 274         gtk_text_set_word_wrap( GTK_TEXT(m_text), TRUE );
 275
 276 #if (GTK_MINOR_VERSION > 2)
 277         /* put the horizontal scrollbar in the lower left hand corner */
 278         if (bHasHScrollbar)
 279         {
 280             GtkWidget *hscrollbar = gtk_hscrollbar_new(GTK_TEXT(m_text)->hadj);
 281             GTK_WIDGET_UNSET_FLAGS( hscrollbar, GTK_CAN_FOCUS );
 282             gtk_table_attach(GTK_TABLE(m_widget), hscrollbar, 0, 1, 1, 2,
 283                        (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 284                        GTK_FILL,
 285                        0, 0);
 286             gtk_widget_show(hscrollbar);
 287
 288             /* don't wrap lines, otherwise we wouldn't need the scrollbar */
 289             gtk_text_set_line_wrap( GTK_TEXT(m_text), FALSE );
 290         }
 291 #endif
 292
 293         /* finally, put the vertical scrollbar in the upper right corner */
 294         m_vScrollbar = gtk_vscrollbar_new( GTK_TEXT(m_text)->vadj );
 295         GTK_WIDGET_UNSET_FLAGS( m_vScrollbar, GTK_CAN_FOCUS );
 296         gtk_table_attach(GTK_TABLE(m_widget), m_vScrollbar, 1, 2, 0, 1,
 297                      GTK_FILL,
 298                      (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 299                      0, 0);
 300     }
 301     else
 302     {
 303         /* a single-line text control: no need for scrollbars */
 304         m_widget =
 305           m_text = gtk_entry_new();
 306     }
 307
 308     m_parent->DoAddChild( this );
 309
 310     PostCreation();
 311
 312     SetFont( parent->GetFont() );
 313
 314     wxSize size_best( DoGetBestSize() );
 315     wxSize new_size( size );
 316     if (new_size.x == -1)
 317         new_size.x = size_best.x;
 318     if (new_size.y == -1)
 319         new_size.y = size_best.y;
 320     if ((new_size.x != size.x) || (new_size.y != size.y))
 321         SetSize( new_size.x, new_size.y );
 322
 323     if (multi_line)
 324         gtk_widget_show(m_text);
 325
 326     if (multi_line)
 327     {
 328         gtk_signal_connect(GTK_OBJECT(GTK_TEXT(m_text)->vadj), "changed",
 329           (GtkSignalFunc) gtk_scrollbar_changed_callback, (gpointer) this );
 330
 331         gtk_signal_connect( GTK_OBJECT(GTK_TEXT(m_text)), "focus_in_event",
 332               GTK_SIGNAL_FUNC(gtk_text_focus_in_callback), (gpointer)this );
 333
 334         gtk_signal_connect( GTK_OBJECT(GTK_TEXT(m_text)), "focus_out_event",
 335                             GTK_SIGNAL_FUNC(gtk_text_focus_out_callback), (gpointer)this );
 336     }
 337     else
 338     {
 339         gtk_signal_connect( GTK_OBJECT(m_text), "focus_in_event",
 340               GTK_SIGNAL_FUNC(gtk_text_focus_in_callback), (gpointer)this );
 341
 342         gtk_signal_connect( GTK_OBJECT(m_text), "focus_out_event",
 343                             GTK_SIGNAL_FUNC(gtk_text_focus_out_callback), (gpointer)this );
 344     }
 345
 346     if (!value.IsEmpty())
 347     {
 348         gint tmp = 0;
 349
 350 #if GTK_MINOR_VERSION == 0
 351         // if we don't realize it, GTK 1.0.6 dies with a SIGSEGV in
 352         // gtk_editable_insert_text()
 353         gtk_widget_realize(m_text);
 354 #endif // GTK 1.0
 355
 356 #if wxUSE_UNICODE
 357         wxWX2MBbuf val = value.mbc_str();
 358         gtk_editable_insert_text( GTK_EDITABLE(m_text), val, strlen(val), &tmp );
 359 #else // !Unicode
 360         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.Length(), &tmp );
 361 #endif // Unicode/!Unicode
 362
 363         if (multi_line)
 364         {
 365             /* bring editable's cursor uptodate. bug in GTK. */
 366
 367             GTK_EDITABLE(m_text)->current_pos = gtk_text_get_point( GTK_TEXT(m_text) );
 368         }
 369     }
 370
 371     if (style & wxTE_PASSWORD)
 372     {
 373         if (!multi_line)
 374             gtk_entry_set_visibility( GTK_ENTRY(m_text), FALSE );
 375     }
 376
 377     if (style & wxTE_READONLY)
 378     {
 379         if (!multi_line)
 380             gtk_entry_set_editable( GTK_ENTRY(m_text), FALSE );
 381     }
 382     else
 383     {
 384         if (multi_line)
 385             gtk_text_set_editable( GTK_TEXT(m_text), 1 );
 386     }
 387
 388     /* we want to be notified about text changes */
 389     gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 390       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 391
 392     /* we don't set a valid background colour, because the window
 393        manager should use a default one */
 394     m_backgroundColour = wxColour();
 395
 396     wxColour colFg = parent->GetForegroundColour();
 397     SetForegroundColour( colFg );
 398
 399     m_cursor = wxCursor( wxCURSOR_IBEAM );
 400
 401     // FIXME: is the bg colour correct here?
 402     wxTextAttr attrDef( colFg,
 403                         wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW),
 404                         parent->GetFont() );
 405     SetDefaultStyle( attrDef );
 406
 407     Show( TRUE );
 408
 409     return TRUE;
 410 }
 411
 412 void wxTextCtrl::CalculateScrollbar()
 413 {
 414     if ((m_windowStyle & wxTE_MULTILINE) == 0) return;
 415
 416     GtkAdjustment *adj = GTK_TEXT(m_text)->vadj;
 417
 418     if (adj->upper - adj->page_size < 0.8)
 419     {
 420         if (m_vScrollbarVisible)
 421         {
 422             gtk_widget_hide( m_vScrollbar );
 423             m_vScrollbarVisible = FALSE;
 424         }
 425     }
 426     else
 427     {
 428         if (!m_vScrollbarVisible)
 429         {
 430             gtk_widget_show( m_vScrollbar );
 431             m_vScrollbarVisible = TRUE;
 432         }
 433     }
 434 }
 435
 436 wxString wxTextCtrl::GetValue() const
 437 {
 438     wxCHECK_MSG( m_text != NULL, wxT(""), wxT("invalid text ctrl") );
 439
 440     wxString tmp;
 441     if (m_windowStyle & wxTE_MULTILINE)
 442     {
 443         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 444         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 445         tmp = wxString(text,*wxConvCurrent);
 446         g_free( text );
 447     }
 448     else
 449     {
 450         tmp = wxString(gtk_entry_get_text( GTK_ENTRY(m_text) ),*wxConvCurrent);
 451     }
 452     return tmp;
 453 }
 454
 455 void wxTextCtrl::SetValue( const wxString &value )
 456 {
 457     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 458
 459     if (m_windowStyle & wxTE_MULTILINE)
 460     {
 461         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 462         gtk_editable_delete_text( GTK_EDITABLE(m_text), 0, len );
 463         len = 0;
 464 #if wxUSE_UNICODE
 465         wxWX2MBbuf tmpbuf = value.mbc_str();
 466         gtk_editable_insert_text( GTK_EDITABLE(m_text), tmpbuf, strlen(tmpbuf), &len );
 467 #else
 468         gtk_editable_insert_text( GTK_EDITABLE(m_text), value.mbc_str(), value.Length(), &len );
 469 #endif
 470     }
 471     else
 472     {
 473         gtk_entry_set_text( GTK_ENTRY(m_text), value.mbc_str() );
 474     }
 475
 476     // GRG, Jun/2000: Changed this after a lot of discussion in
 477     //   the lists. wxWindows 2.2 will have a set of flags to
 478     //   customize this behaviour.
 479     SetInsertionPoint(0);
 480
 481     m_modified = FALSE;
 482 }
 483
 484 void wxTextCtrl::WriteText( const wxString &text )
 485 {
 486     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 487
 488     if ( text.empty() )
 489         return;
 490
 491 #if wxUSE_UNICODE
 492     wxWX2MBbuf buf = text.mbc_str();
 493     const char *txt = buf;
 494     size_t txtlen = strlen(buf);
 495 #else
 496     const char *txt = text;
 497     size_t txtlen = text.length();
 498 #endif
 499
 500     if ( m_windowStyle & wxTE_MULTILINE )
 501     {
 502         /* this moves the cursor pos to behind the inserted text */
 503         gint len = GTK_EDITABLE(m_text)->current_pos;
 504
 505         // if we have any special style, use it
 506         if ( !m_defaultStyle.IsDefault() )
 507         {
 508             GdkFont *font = m_defaultStyle.HasFont()
 509                                 ? m_defaultStyle.GetFont().GetInternalFont()
 510                                 : NULL;
 511
 512             GdkColor *colFg = m_defaultStyle.HasTextColour()
 513                                 ? m_defaultStyle.GetTextColour().GetColor()
 514                                 : NULL;
 515
 516             GdkColor *colBg = m_defaultStyle.HasBackgroundColour()
 517                                 ? m_defaultStyle.GetBackgroundColour().GetColor()
 518                                 : NULL;
 519
 520             gtk_text_insert( GTK_TEXT(m_text), font, colFg, colBg, txt, txtlen );
 521         }
 522         else // no style
 523         {
 524             gtk_editable_insert_text( GTK_EDITABLE(m_text), txt, txtlen, &len );
 525         }
 526
 527         /* bring editable's cursor uptodate. bug in GTK. */
 528         GTK_EDITABLE(m_text)->current_pos = gtk_text_get_point( GTK_TEXT(m_text) );
 529     }
 530     else // single line
 531     {
 532         /* this moves the cursor pos to behind the inserted text */
 533         gint len = GTK_EDITABLE(m_text)->current_pos;
 534         gtk_editable_insert_text( GTK_EDITABLE(m_text), txt, txtlen, &len );
 535
 536         /* bring editable's cursor uptodate. bug in GTK. */
 537         GTK_EDITABLE(m_text)->current_pos += text.Len();
 538
 539         /* bring entry's cursor uptodate. bug in GTK. */
 540         gtk_entry_set_position( GTK_ENTRY(m_text), GTK_EDITABLE(m_text)->current_pos );
 541     }
 542 }
 543
 544 void wxTextCtrl::AppendText( const wxString &text )
 545 {
 546     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 547
 548     if ( text.empty() )
 549         return;
 550
 551 #if wxUSE_UNICODE
 552     wxWX2MBbuf buf = text.mbc_str();
 553     const char *txt = buf;
 554     size_t txtlen = strlen(buf);
 555 #else
 556     const char *txt = text;
 557     size_t txtlen = text.length();
 558 #endif
 559
 560     if (m_windowStyle & wxTE_MULTILINE)
 561     {
 562         if ( !m_defaultStyle.IsDefault() )
 563         {
 564             wxFont font = m_defaultStyle.HasFont() ? m_defaultStyle.GetFont()
 565                                                    : m_font;
 566             GdkFont *fnt = font.Ok() ? font.GetInternalFont() : NULL;
 567
 568             wxColour col = m_defaultStyle.HasTextColour()
 569                                 ? m_defaultStyle.GetTextColour()
 570                                 : m_foregroundColour;
 571             GdkColor *colFg = col.Ok() ? col.GetColor() : NULL;
 572
 573             col = m_defaultStyle.HasBackgroundColour()
 574                     ? m_defaultStyle.GetBackgroundColour()
 575                     : m_backgroundColour;
 576             GdkColor *colBg = col.Ok() ? col.GetColor() : NULL;
 577
 578             gtk_text_insert( GTK_TEXT(m_text), fnt, colFg, colBg, txt, txtlen );
 579         }
 580         else // no style
 581         {
 582             /* we'll insert at the last position */
 583             gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 584             gtk_editable_insert_text( GTK_EDITABLE(m_text), txt, txtlen, &len );
 585         }
 586
 587         /* bring editable's cursor uptodate. bug in GTK. */
 588         GTK_EDITABLE(m_text)->current_pos = gtk_text_get_point( GTK_TEXT(m_text) );
 589     }
 590     else // single line
 591     {
 592         gtk_entry_append_text( GTK_ENTRY(m_text), txt );
 593     }
 594 }
 595
 596 wxString wxTextCtrl::GetLineText( long lineNo ) const
 597 {
 598   if (m_windowStyle & wxTE_MULTILINE)
 599   {
 600     gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 601     char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 602
 603     if (text)
 604     {
 605         wxString buf(wxT(""));
 606         long i;
 607         int currentLine = 0;
 608         for (i = 0; currentLine != lineNo && text[i]; i++ )
 609           if (text[i] == '\n')
 610             currentLine++;
 611         // Now get the text
 612         int j;
 613         for (j = 0; text[i] && text[i] != '\n'; i++, j++ )
 614             buf += text[i];
 615
 616         g_free( text );
 617         return buf;
 618     }
 619     else
 620       return wxEmptyString;
 621   }
 622   else
 623   {
 624     if (lineNo == 0) return GetValue();
 625     return wxEmptyString;
 626   }
 627 }
 628
 629 void wxTextCtrl::OnDropFiles( wxDropFilesEvent &WXUNUSED(event) )
 630 {
 631   /* If you implement this, don't forget to update the documentation!
 632    * (file docs/latex/wx/text.tex) */
 633     wxFAIL_MSG( wxT("wxTextCtrl::OnDropFiles not implemented") );
 634 }
 635
 636 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y ) const
 637 {
 638     if ( m_windowStyle & wxTE_MULTILINE )
 639     {
 640         wxString text = GetValue();
 641
 642         // cast to prevent warning. But pos really should've been unsigned.
 643         if( (unsigned long)pos > text.Len()  )
 644             return FALSE;
 645
 646         *x=0;   // First Col
 647         *y=0;   // First Line
 648
 649         const wxChar* stop = text.c_str() + pos;
 650         for ( const wxChar *p = text.c_str(); p < stop; p++ )
 651         {
 652             if (*p == wxT('\n'))
 653             {
 654                 (*y)++;
 655                 *x=0;
 656             }
 657             else
 658                 (*x)++;
 659         }
 660     }
 661     else // single line control
 662     {
 663         if ( pos <= GTK_ENTRY(m_text)->text_length )
 664         {
 665             *y = 0;
 666             *x = pos;
 667         }
 668         else
 669         {
 670             // index out of bounds
 671             return FALSE;
 672         }
 673     }
 674
 675     return TRUE;
 676 }
 677
 678 long wxTextCtrl::XYToPosition(long x, long y ) const
 679 {
 680     if (!(m_windowStyle & wxTE_MULTILINE)) return 0;
 681
 682     long pos=0;
 683     for( int i=0; i<y; i++ ) pos += GetLineLength(i) + 1; // one for '\n'
 684
 685     pos += x;
 686     return pos;
 687 }
 688
 689 int wxTextCtrl::GetLineLength(long lineNo) const
 690 {
 691     wxString str = GetLineText (lineNo);
 692     return (int) str.Length();
 693 }
 694
 695 int wxTextCtrl::GetNumberOfLines() const
 696 {
 697     if (m_windowStyle & wxTE_MULTILINE)
 698     {
 699         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 700         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 701
 702         if (text)
 703         {
 704             int currentLine = 0;
 705             for (int i = 0; i < len; i++ )
 706             {
 707                 if (text[i] == '\n')
 708                     currentLine++;
 709             }
 710             g_free( text );
 711
 712             // currentLine is 0 based, add 1 to get number of lines
 713             return currentLine + 1;
 714         }
 715         else
 716         {
 717             return 0;
 718         }
 719     }
 720     else
 721     {
 722         return 1;
 723     }
 724 }
 725
 726 void wxTextCtrl::SetInsertionPoint( long pos )
 727 {
 728     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 729
 730     if (m_windowStyle & wxTE_MULTILINE)
 731     {
 732         /* seems to be broken in GTK 1.0.X:
 733            gtk_text_set_point( GTK_TEXT(m_text), (int)pos ); */
 734
 735         gtk_signal_disconnect_by_func( GTK_OBJECT(m_text),
 736           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 737
 738         /* we fake a set_point by inserting and deleting. as the user
 739            isn't supposed to get to know about thos non-sense, we
 740            disconnect so that no events are sent to the user program. */
 741
 742         gint tmp = (gint)pos;
 743         gtk_editable_insert_text( GTK_EDITABLE(m_text), " ", 1, &tmp );
 744         gtk_editable_delete_text( GTK_EDITABLE(m_text), tmp-1, tmp );
 745
 746         gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 747           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 748
 749         /* bring editable's cursor uptodate. another bug in GTK. */
 750
 751         GTK_EDITABLE(m_text)->current_pos = gtk_text_get_point( GTK_TEXT(m_text) );
 752     }
 753     else
 754     {
 755         gtk_entry_set_position( GTK_ENTRY(m_text), (int)pos );
 756
 757         /* bring editable's cursor uptodate. bug in GTK. */
 758
 759         GTK_EDITABLE(m_text)->current_pos = (guint32)pos;
 760     }
 761 }
 762
 763 void wxTextCtrl::SetInsertionPointEnd()
 764 {
 765     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 766
 767     if (m_windowStyle & wxTE_MULTILINE)
 768         SetInsertionPoint(gtk_text_get_length(GTK_TEXT(m_text)));
 769     else
 770         gtk_entry_set_position( GTK_ENTRY(m_text), -1 );
 771 }
 772
 773 void wxTextCtrl::SetEditable( bool editable )
 774 {
 775     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 776
 777     if (m_windowStyle & wxTE_MULTILINE)
 778         gtk_text_set_editable( GTK_TEXT(m_text), editable );
 779     else
 780         gtk_entry_set_editable( GTK_ENTRY(m_text), editable );
 781 }
 782
 783 bool wxTextCtrl::Enable( bool enable )
 784 {
 785     if (!wxWindowBase::Enable(enable))
 786     {
 787         // nothing to do
 788         return FALSE;
 789     }
 790
 791     if (m_windowStyle & wxTE_MULTILINE)
 792     {
 793         gtk_text_set_editable( GTK_TEXT(m_text), enable );
 794         OnParentEnable(enable);
 795     }
 796     else
 797     {
 798         gtk_widget_set_sensitive( m_text, enable );
 799     }
 800
 801     return TRUE;
 802 }
 803
 804 // wxGTK-specific: called recursively by Enable,
 805 // to give widgets an oppprtunity to correct their colours after they
 806 // have been changed by Enable
 807 void wxTextCtrl::OnParentEnable( bool enable )
 808 {
 809     // If we have a custom background colour, we use this colour in both
 810     // disabled and enabled mode, or we end up with a different colour under the
 811     // text.
 812     wxColour oldColour = GetBackgroundColour();
 813     if (oldColour.Ok())
 814     {
 815         // Need to set twice or it'll optimize the useful stuff out
 816         if (oldColour == * wxWHITE)
 817             SetBackgroundColour(*wxBLACK);
 818         else
 819             SetBackgroundColour(*wxWHITE);
 820         SetBackgroundColour(oldColour);
 821     }
 822 }
 823
 824 void wxTextCtrl::DiscardEdits()
 825 {
 826     m_modified = FALSE;
 827 }
 828
 829 void wxTextCtrl::SetSelection( long from, long to )
 830 {
 831     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 832
 833     if ( (m_windowStyle & wxTE_MULTILINE) &&
 834          !GTK_TEXT(m_text)->line_start_cache )
 835     {
 836         // tell the programmer that it didn't work
 837         wxLogDebug(_T("Can't call SetSelection() before realizing the control"));
 838         return;
 839     }
 840
 841     gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 842 }
 843
 844 void wxTextCtrl::ShowPosition( long WXUNUSED(pos) )
 845 {
 846 //    SetInsertionPoint( pos );
 847 }
 848
 849 long wxTextCtrl::GetInsertionPoint() const
 850 {
 851     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 852
 853     return (long) GTK_EDITABLE(m_text)->current_pos;
 854 }
 855
 856 long wxTextCtrl::GetLastPosition() const
 857 {
 858     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 859
 860     int pos = 0;
 861     if (m_windowStyle & wxTE_MULTILINE)
 862         pos = gtk_text_get_length( GTK_TEXT(m_text) );
 863     else
 864         pos = GTK_ENTRY(m_text)->text_length;
 865
 866     return (long)pos;
 867 }
 868
 869 void wxTextCtrl::Remove( long from, long to )
 870 {
 871     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 872
 873     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 874 }
 875
 876 void wxTextCtrl::Replace( long from, long to, const wxString &value )
 877 {
 878     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 879
 880     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 881
 882     if (!value.IsEmpty())
 883     {
 884         gint pos = (gint)from;
 885 #if wxUSE_UNICODE
 886         wxWX2MBbuf buf = value.mbc_str();
 887         gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &pos );
 888 #else
 889         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.Length(), &pos );
 890 #endif
 891     }
 892 }
 893
 894 void wxTextCtrl::Cut()
 895 {
 896     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 897
 898 #if (GTK_MINOR_VERSION > 0)
 899     gtk_editable_cut_clipboard( GTK_EDITABLE(m_text) );
 900 #else
 901     gtk_editable_cut_clipboard( GTK_EDITABLE(m_text), 0 );
 902 #endif
 903 }
 904
 905 void wxTextCtrl::Copy()
 906 {
 907     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 908
 909 #if (GTK_MINOR_VERSION > 0)
 910     gtk_editable_copy_clipboard( GTK_EDITABLE(m_text) );
 911 #else
 912     gtk_editable_copy_clipboard( GTK_EDITABLE(m_text), 0 );
 913 #endif
 914 }
 915
 916 void wxTextCtrl::Paste()
 917 {
 918     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 919
 920 #if (GTK_MINOR_VERSION > 0)
 921     gtk_editable_paste_clipboard( GTK_EDITABLE(m_text) );
 922 #else
 923     gtk_editable_paste_clipboard( GTK_EDITABLE(m_text), 0 );
 924 #endif
 925 }
 926
 927 // Undo/redo
 928 void wxTextCtrl::Undo()
 929 {
 930     // TODO
 931     wxFAIL_MSG( wxT("wxTextCtrl::Undo not implemented") );
 932 }
 933
 934 void wxTextCtrl::Redo()
 935 {
 936     // TODO
 937     wxFAIL_MSG( wxT("wxTextCtrl::Redo not implemented") );
 938 }
 939
 940 bool wxTextCtrl::CanUndo() const
 941 {
 942     // TODO
 943     wxFAIL_MSG( wxT("wxTextCtrl::CanUndo not implemented") );
 944     return FALSE;
 945 }
 946
 947 bool wxTextCtrl::CanRedo() const
 948 {
 949     // TODO
 950     wxFAIL_MSG( wxT("wxTextCtrl::CanRedo not implemented") );
 951     return FALSE;
 952 }
 953
 954 // If the return values from and to are the same, there is no
 955 // selection.
 956 void wxTextCtrl::GetSelection(long* fromOut, long* toOut) const
 957 {
 958     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 959
 960     long from, to;
 961     if ( !(GTK_EDITABLE(m_text)->has_selection) )
 962     {
 963         from =
 964         to = GetInsertionPoint();
 965     }
 966     else // got selection
 967     {
 968         from = (long) GTK_EDITABLE(m_text)->selection_start_pos;
 969         to = (long) GTK_EDITABLE(m_text)->selection_end_pos;
 970
 971         if ( from > to )
 972         {
 973             // exchange them to be compatible with wxMSW
 974             long tmp = from;
 975             from = to;
 976             to = tmp;
 977         }
 978     }
 979
 980     if ( fromOut )
 981         *fromOut = from;
 982     if ( toOut )
 983         *toOut = to;
 984 }
 985
 986 bool wxTextCtrl::IsEditable() const
 987 {
 988     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
 989
 990     return GTK_EDITABLE(m_text)->editable;
 991 }
 992
 993 bool wxTextCtrl::IsModified() const
 994 {
 995     return m_modified;
 996 }
 997
 998 void wxTextCtrl::Clear()
 999 {
1000     SetValue( wxT("") );
1001 }
1002
1003 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
1004 {
1005     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1006
1007     if ((key_event.KeyCode() == WXK_RETURN) && (m_windowStyle & wxPROCESS_ENTER))
1008     {
1009         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1010         event.SetEventObject(this);
1011         event.SetString(GetValue());
1012         if (GetEventHandler()->ProcessEvent(event)) return;
1013     }
1014
1015     if ((key_event.KeyCode() == WXK_RETURN) && !(m_windowStyle & wxTE_MULTILINE))
1016     {
1017         wxWindow *top_frame = m_parent;
1018         while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
1019             top_frame = top_frame->GetParent();
1020         GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
1021
1022         if (window->default_widget)
1023         {
1024             gtk_widget_activate (window->default_widget);
1025             return;
1026         }
1027     }
1028
1029     key_event.Skip();
1030 }
1031
1032 GtkWidget* wxTextCtrl::GetConnectWidget()
1033 {
1034     return GTK_WIDGET(m_text);
1035 }
1036
1037 bool wxTextCtrl::IsOwnGtkWindow( GdkWindow *window )
1038 {
1039     if (m_windowStyle & wxTE_MULTILINE)
1040         return (window == GTK_TEXT(m_text)->text_area);
1041     else
1042         return (window == GTK_ENTRY(m_text)->text_area);
1043 }
1044
1045 // the font will change for subsequent text insertiongs
1046 bool wxTextCtrl::SetFont( const wxFont &font )
1047 {
1048     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
1049
1050     if ( !wxWindowBase::SetFont(font) )
1051     {
1052         // font didn't change, nothing to do
1053         return FALSE;
1054     }
1055
1056     if ( m_windowStyle & wxTE_MULTILINE )
1057     {
1058         m_updateFont = TRUE;
1059
1060         m_defaultStyle.SetFont(font);
1061
1062         ChangeFontGlobally();
1063     }
1064
1065     return TRUE;
1066 }
1067
1068 void wxTextCtrl::ChangeFontGlobally()
1069 {
1070     // this method is very inefficient and hence should be called as rarely as
1071     // possible!
1072     wxASSERT_MSG( (m_windowStyle & wxTE_MULTILINE) && m_updateFont,
1073                   _T("shouldn't be called for single line controls") );
1074
1075     wxString value = GetValue();
1076     if ( !value.IsEmpty() )
1077     {
1078         m_updateFont = FALSE;
1079
1080         Clear();
1081         AppendText(value);
1082     }
1083 }
1084
1085 void wxTextCtrl::UpdateFontIfNeeded()
1086 {
1087     if ( m_updateFont )
1088         ChangeFontGlobally();
1089 }
1090
1091 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1092 {
1093     if ( !wxControl::SetForegroundColour(colour) )
1094         return FALSE;
1095
1096     // update default fg colour too
1097     m_defaultStyle.SetTextColour(colour);
1098
1099     return TRUE;
1100 }
1101
1102 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
1103 {
1104     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
1105
1106     if ( !wxControl::SetBackgroundColour( colour ) )
1107         return FALSE;
1108
1109     if (!m_widget->window)
1110         return FALSE;
1111
1112     wxColour sysbg = wxSystemSettings::GetSystemColour( wxSYS_COLOUR_BTNFACE );
1113     if (sysbg.Red() == colour.Red() &&
1114         sysbg.Green() == colour.Green() &&
1115         sysbg.Blue() == colour.Blue())
1116     {
1117         return FALSE; // FIXME or TRUE?
1118     }
1119
1120     if (!m_backgroundColour.Ok())
1121         return FALSE;
1122
1123     if (m_windowStyle & wxTE_MULTILINE)
1124     {
1125         GdkWindow *window = GTK_TEXT(m_text)->text_area;
1126         if (!window)
1127             return FALSE;
1128         m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
1129         gdk_window_set_background( window, m_backgroundColour.GetColor() );
1130         gdk_window_clear( window );
1131     }
1132
1133     // change active background color too
1134     m_defaultStyle.SetBackgroundColour( colour );
1135
1136     return TRUE;
1137 }
1138
1139 bool wxTextCtrl::SetStyle( long start, long end, const wxTextAttr &style )
1140 {
1141     /* VERY dirty way to do that - removes the required text and re-adds it
1142        with styling (FIXME) */
1143     if ( m_windowStyle & wxTE_MULTILINE )
1144     {
1145         if ( style.IsDefault() )
1146         {
1147             // nothing to do
1148             return TRUE;
1149         }
1150
1151         gint l = gtk_text_get_length( GTK_TEXT(m_text) );
1152
1153         wxCHECK_MSG( start >= 0 && end <= l, FALSE,
1154                      _T("invalid range in wxTextCtrl::SetStyle") );
1155
1156         gint old_pos = gtk_editable_get_position( GTK_EDITABLE(m_text) );
1157         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), start, end );
1158         wxString tmp(text,*wxConvCurrent);
1159         g_free( text );
1160
1161         gtk_editable_delete_text( GTK_EDITABLE(m_text), start, end );
1162         gtk_editable_set_position( GTK_EDITABLE(m_text), start );
1163
1164 #if wxUSE_UNICODE
1165         wxWX2MBbuf buf = tmp.mbc_str();
1166         const char *txt = buf;
1167         size_t txtlen = strlen(buf);
1168 #else
1169         const char *txt = tmp;
1170         size_t txtlen = tmp.length();
1171 #endif
1172
1173         GdkFont *font = style.HasFont()
1174                             ? style.GetFont().GetInternalFont()
1175                             : NULL;
1176
1177         GdkColor *colFg = style.HasTextColour()
1178                             ? style.GetTextColour().GetColor()
1179                             : NULL;
1180
1181         GdkColor *colBg = style.HasBackgroundColour()
1182                             ? style.GetBackgroundColour().GetColor()
1183                             : NULL;
1184
1185         gtk_text_insert( GTK_TEXT(m_text), font, colFg, colBg, txt, txtlen );
1186
1187         /* does not seem to help under GTK+ 1.2 !!!
1188         gtk_editable_set_position( GTK_EDITABLE(m_text), old_pos ); */
1189         SetInsertionPoint( old_pos );
1190         return TRUE;
1191     }
1192     else // singe line
1193     {
1194         // cannot do this for GTK+'s Entry widget
1195         return FALSE;
1196     }
1197 }
1198
1199 void wxTextCtrl::ApplyWidgetStyle()
1200 {
1201     if (m_windowStyle & wxTE_MULTILINE)
1202     {
1203         // how ?
1204     }
1205     else
1206     {
1207         SetWidgetStyle();
1208         gtk_widget_set_style( m_text, m_widgetStyle );
1209     }
1210 }
1211
1212 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1213 {
1214     Cut();
1215 }
1216
1217 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1218 {
1219     Copy();
1220 }
1221
1222 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1223 {
1224     Paste();
1225 }
1226
1227 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1228 {
1229     Undo();
1230 }
1231
1232 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1233 {
1234     Redo();
1235 }
1236
1237 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1238 {
1239     event.Enable( CanCut() );
1240 }
1241
1242 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1243 {
1244     event.Enable( CanCopy() );
1245 }
1246
1247 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1248 {
1249     event.Enable( CanPaste() );
1250 }
1251
1252 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1253 {
1254     event.Enable( CanUndo() );
1255 }
1256
1257 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1258 {
1259     event.Enable( CanRedo() );
1260 }
1261
1262 void wxTextCtrl::OnInternalIdle()
1263 {
1264     wxCursor cursor = m_cursor;
1265     if (g_globalCursor.Ok()) cursor = g_globalCursor;
1266
1267     if (cursor.Ok())
1268     {
1269         GdkWindow *window = (GdkWindow*) NULL;
1270         if (HasFlag(wxTE_MULTILINE))
1271             window = GTK_TEXT(m_text)->text_area;
1272         else
1273             window = GTK_ENTRY(m_text)->text_area;
1274
1275         if (window)
1276             gdk_window_set_cursor( window, cursor.GetCursor() );
1277
1278         if (!g_globalCursor.Ok())
1279             cursor = *wxSTANDARD_CURSOR;
1280
1281         window = m_widget->window;
1282         if ((window) && !(GTK_WIDGET_NO_WINDOW(m_widget)))
1283             gdk_window_set_cursor( window, cursor.GetCursor() );
1284     }
1285
1286     UpdateWindowUI();
1287 }
1288
1289 wxSize wxTextCtrl::DoGetBestSize() const
1290 {
1291     // FIXME should be different for multi-line controls...
1292     wxSize ret( wxControl::DoGetBestSize() );
1293     return wxSize(80, ret.y);
1294 }
1295
1296 // ----------------------------------------------------------------------------
1297 // freeze/thaw
1298 // ----------------------------------------------------------------------------
1299
1300 void wxTextCtrl::Freeze()
1301 {
1302     if ( HasFlag(wxTE_MULTILINE) )
1303     {
1304         gtk_text_freeze(GTK_TEXT(m_text));
1305     }
1306 }
1307
1308 void wxTextCtrl::Thaw()
1309 {
1310     if ( HasFlag(wxTE_MULTILINE) )
1311     {
1312         GTK_TEXT(m_text)->vadj->value = 0.0;
1313
1314         gtk_text_thaw(GTK_TEXT(m_text));
1315     }
1316 }
1317
1318 // ----------------------------------------------------------------------------
1319 // scrolling
1320 // ----------------------------------------------------------------------------
1321
1322 GtkAdjustment *wxTextCtrl::GetVAdj() const
1323 {
1324     return HasFlag(wxTE_MULTILINE) ? GTK_TEXT(m_text)->vadj : NULL;
1325 }
1326
1327 bool wxTextCtrl::DoScroll(GtkAdjustment *adj, int diff)
1328 {
1329     float value = adj->value + diff;
1330
1331     if ( value < 0 )
1332         value = 0;
1333
1334     float upper = adj->upper - adj->page_size;
1335     if ( value > upper )
1336         value = upper;
1337
1338     // did we noticeably change the scroll position?
1339     if ( fabs(adj->value - value) < 0.2 )
1340     {
1341         // well, this is what Robert does in wxScrollBar, so it must be good...
1342         return FALSE;
1343     }
1344
1345     adj->value = value;
1346
1347     gtk_signal_emit_by_name(GTK_OBJECT(adj), "value_changed");
1348
1349     return TRUE;
1350 }
1351
1352 bool wxTextCtrl::ScrollLines(int lines)
1353 {
1354     GtkAdjustment *adj = GetVAdj();
1355     if ( !adj )
1356         return FALSE;
1357
1358     // this is hardcoded to 10 in GTK+ 1.2 (great idea)
1359     static const int KEY_SCROLL_PIXELS = 10;
1360
1361     return DoScroll(adj, lines*KEY_SCROLL_PIXELS);
1362 }
1363
1364 bool wxTextCtrl::ScrollPages(int pages)
1365 {
1366     GtkAdjustment *adj = GetVAdj();
1367     if ( !adj )
1368         return FALSE;
1369
1370     return DoScroll(adj, (int)ceil(pages*adj->page_increment));
1371 }
1372