src/gtk/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 // TODO: reimplement wxTextCtrl using GtkTextView
  27 #ifdef __WXGTK20__
  28     #define GTK_ENABLE_BROKEN       // need this to get GtkText at all
  29 #endif // __WXGTK20__
  30
  31 #include "wx/gtk/private.h"
  32 #include <gdk/gdkkeysyms.h>
  33
  34 //-----------------------------------------------------------------------------
  35 // idle system
  36 //-----------------------------------------------------------------------------
  37
  38 extern void wxapp_install_idle_handler();
  39 extern bool g_isIdle;
  40
  41 //-----------------------------------------------------------------------------
  42 // data
  43 //-----------------------------------------------------------------------------
  44
  45 extern bool       g_blockEventsOnDrag;
  46 extern wxCursor   g_globalCursor;
  47 extern wxWindowGTK *g_delayedFocus;
  48
  49 // ----------------------------------------------------------------------------
  50 // helpers
  51 // ----------------------------------------------------------------------------
  52
  53 static void wxGtkTextInsert(GtkWidget *text,
  54                             const wxTextAttr& attr,
  55                             const char *txt,
  56                             size_t len)
  57 {
  58     GdkFont *font = attr.HasFont() ? attr.GetFont().GetInternalFont()
  59                                    : NULL;
  60
  61     GdkColor *colFg = attr.HasTextColour() ? attr.GetTextColour().GetColor()
  62                                            : NULL;
  63
  64     GdkColor *colBg = attr.HasBackgroundColour()
  65                         ? attr.GetBackgroundColour().GetColor()
  66                         : NULL;
  67
  68     gtk_text_insert( GTK_TEXT(text), font, colFg, colBg, txt, len );
  69 }
  70
  71 // ----------------------------------------------------------------------------
  72 // "insert_text" for GtkEntry
  73 // ----------------------------------------------------------------------------
  74
  75 static void
  76 gtk_insert_text_callback(GtkEditable *editable,
  77                          const gchar *new_text,
  78                          gint new_text_length,
  79                          gint *position,
  80                          wxTextCtrl *win)
  81 {
  82     if (g_isIdle)
  83         wxapp_install_idle_handler();
  84
  85     // we should only be called if we have a max len limit at all
  86     GtkEntry *entry = GTK_ENTRY (editable);
  87
  88     wxCHECK_RET( entry->text_max_length, _T("shouldn't be called") );
  89
  90     // check that we don't overflow the max length limit
  91     //
  92     // FIXME: this doesn't work when we paste a string which is going to be
  93     //        truncated
  94     if ( entry->text_length == entry->text_max_length )
  95     {
  96         // we don't need to run the base class version at all
  97         gtk_signal_emit_stop_by_name(GTK_OBJECT(editable), "insert_text");
  98
  99         // remember that the next changed signal is to be ignored to avoid
 100         // generating a dummy wxEVT_COMMAND_TEXT_UPDATED event
 101         win->IgnoreNextTextUpdate();
 102
 103         // and generate the correct one ourselves
 104         wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, win->GetId());
 105         event.SetEventObject(win);
 106         event.SetString(win->GetValue());
 107         win->GetEventHandler()->ProcessEvent( event );
 108     }
 109 }
 110
 111 //-----------------------------------------------------------------------------
 112 //  "changed"
 113 //-----------------------------------------------------------------------------
 114
 115 static void
 116 gtk_text_changed_callback( GtkWidget *widget, wxTextCtrl *win )
 117 {
 118     if ( win->IgnoreTextUpdate() )
 119         return;
 120
 121     if (!win->m_hasVMT) return;
 122
 123     if (g_isIdle)
 124         wxapp_install_idle_handler();
 125
 126     win->SetModified();
 127     win->UpdateFontIfNeeded();
 128
 129     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
 130     event.SetEventObject( win );
 131     event.SetString( win->GetValue() );
 132     win->GetEventHandler()->ProcessEvent( event );
 133 }
 134
 135 //-----------------------------------------------------------------------------
 136 // "changed" from vertical scrollbar
 137 //-----------------------------------------------------------------------------
 138
 139 static void
 140 gtk_scrollbar_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 141 {
 142     if (!win->m_hasVMT) return;
 143
 144     if (g_isIdle)
 145         wxapp_install_idle_handler();
 146
 147     win->CalculateScrollbar();
 148 }
 149
 150 //-----------------------------------------------------------------------------
 151 //  wxTextCtrl
 152 //-----------------------------------------------------------------------------
 153
 154 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl,wxControl)
 155
 156 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 157     EVT_CHAR(wxTextCtrl::OnChar)
 158
 159     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 160     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 161     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 162     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 163     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 164
 165     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 166     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 167     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 168     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 169     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 170 END_EVENT_TABLE()
 171
 172 void wxTextCtrl::Init()
 173 {
 174     m_ignoreNextUpdate =
 175     m_modified = FALSE;
 176     m_updateFont = FALSE;
 177     m_text =
 178     m_vScrollbar = (GtkWidget *)NULL;
 179 }
 180
 181 wxTextCtrl::wxTextCtrl( wxWindow *parent,
 182                         wxWindowID id,
 183                         const wxString &value,
 184                         const wxPoint &pos,
 185                         const wxSize &size,
 186                         long style,
 187                         const wxValidator& validator,
 188                         const wxString &name )
 189 {
 190     Init();
 191
 192     Create( parent, id, value, pos, size, style, validator, name );
 193 }
 194
 195 bool wxTextCtrl::Create( wxWindow *parent,
 196                          wxWindowID id,
 197                          const wxString &value,
 198                          const wxPoint &pos,
 199                          const wxSize &size,
 200                          long style,
 201                          const wxValidator& validator,
 202                          const wxString &name )
 203 {
 204     m_needParent = TRUE;
 205     m_acceptsFocus = TRUE;
 206
 207     if (!PreCreation( parent, pos, size ) ||
 208         !CreateBase( parent, id, pos, size, style, validator, name ))
 209     {
 210         wxFAIL_MSG( wxT("wxTextCtrl creation failed") );
 211         return FALSE;
 212     }
 213
 214
 215     m_vScrollbarVisible = FALSE;
 216
 217     bool multi_line = (style & wxTE_MULTILINE) != 0;
 218     if (multi_line)
 219     {
 220 #ifdef __WXGTK13__
 221         /* a multi-line edit control: create a vertical scrollbar by default and
 222            horizontal if requested */
 223         bool bHasHScrollbar = (style & wxHSCROLL) != 0;
 224 #else
 225         bool bHasHScrollbar = FALSE;
 226 #endif
 227
 228         /* create our control ... */
 229         m_text = gtk_text_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
 230
 231         /* ... and put into the upper left hand corner of the table */
 232         m_widget = gtk_table_new(bHasHScrollbar ? 2 : 1, 2, FALSE);
 233         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 234         gtk_table_attach( GTK_TABLE(m_widget), m_text, 0, 1, 0, 1,
 235                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 236                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 237                        0, 0);
 238
 239         /* always wrap words */
 240         gtk_text_set_word_wrap( GTK_TEXT(m_text), TRUE );
 241
 242 #ifdef __WXGTK13__
 243         /* put the horizontal scrollbar in the lower left hand corner */
 244         if (bHasHScrollbar)
 245         {
 246             GtkWidget *hscrollbar = gtk_hscrollbar_new(GTK_TEXT(m_text)->hadj);
 247             GTK_WIDGET_UNSET_FLAGS( hscrollbar, GTK_CAN_FOCUS );
 248             gtk_table_attach(GTK_TABLE(m_widget), hscrollbar, 0, 1, 1, 2,
 249                        (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 250                        GTK_FILL,
 251                        0, 0);
 252             gtk_widget_show(hscrollbar);
 253
 254             /* don't wrap lines, otherwise we wouldn't need the scrollbar */
 255             gtk_text_set_line_wrap( GTK_TEXT(m_text), FALSE );
 256         }
 257 #endif
 258
 259         /* finally, put the vertical scrollbar in the upper right corner */
 260         m_vScrollbar = gtk_vscrollbar_new( GTK_TEXT(m_text)->vadj );
 261         GTK_WIDGET_UNSET_FLAGS( m_vScrollbar, GTK_CAN_FOCUS );
 262         gtk_table_attach(GTK_TABLE(m_widget), m_vScrollbar, 1, 2, 0, 1,
 263                      GTK_FILL,
 264                      (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 265                      0, 0);
 266     }
 267     else
 268     {
 269         /* a single-line text control: no need for scrollbars */
 270         m_widget =
 271           m_text = gtk_entry_new();
 272     }
 273
 274     m_parent->DoAddChild( this );
 275
 276     m_focusWidget = m_text;
 277
 278     PostCreation();
 279
 280     SetFont( parent->GetFont() );
 281
 282     wxSize size_best( DoGetBestSize() );
 283     wxSize new_size( size );
 284     if (new_size.x == -1)
 285         new_size.x = size_best.x;
 286     if (new_size.y == -1)
 287         new_size.y = size_best.y;
 288     if ((new_size.x != size.x) || (new_size.y != size.y))
 289         SetSize( new_size.x, new_size.y );
 290
 291     if (multi_line)
 292         gtk_widget_show(m_text);
 293
 294     if (multi_line)
 295     {
 296         gtk_signal_connect(GTK_OBJECT(GTK_TEXT(m_text)->vadj), "changed",
 297           (GtkSignalFunc) gtk_scrollbar_changed_callback, (gpointer) this );
 298     }
 299
 300     if (!value.IsEmpty())
 301     {
 302         gint tmp = 0;
 303
 304 #if !GTK_CHECK_VERSION(1, 2, 0)
 305         // if we don't realize it, GTK 1.0.6 dies with a SIGSEGV in
 306         // gtk_editable_insert_text()
 307         gtk_widget_realize(m_text);
 308 #endif // GTK 1.0
 309
 310 #if wxUSE_UNICODE
 311         wxWX2MBbuf val = value.mbc_str();
 312         gtk_editable_insert_text( GTK_EDITABLE(m_text), val, strlen(val), &tmp );
 313 #else // !Unicode
 314         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.Length(), &tmp );
 315 #endif // Unicode/!Unicode
 316
 317         if (multi_line)
 318         {
 319             /* bring editable's cursor uptodate. bug in GTK. */
 320             SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 321         }
 322     }
 323
 324     if (style & wxTE_PASSWORD)
 325     {
 326         if (!multi_line)
 327             gtk_entry_set_visibility( GTK_ENTRY(m_text), FALSE );
 328     }
 329
 330     if (style & wxTE_READONLY)
 331     {
 332         if (!multi_line)
 333             gtk_entry_set_editable( GTK_ENTRY(m_text), FALSE );
 334     }
 335     else
 336     {
 337         if (multi_line)
 338             gtk_text_set_editable( GTK_TEXT(m_text), 1 );
 339     }
 340
 341     /* we want to be notified about text changes */
 342     gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 343       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 344
 345     /* we don't set a valid background colour, because the window
 346        manager should use a default one */
 347     m_backgroundColour = wxColour();
 348
 349     wxColour colFg = parent->GetForegroundColour();
 350     SetForegroundColour( colFg );
 351
 352     m_cursor = wxCursor( wxCURSOR_IBEAM );
 353
 354     wxTextAttr attrDef( colFg, m_backgroundColour, parent->GetFont() );
 355     SetDefaultStyle( attrDef );
 356
 357     Show( TRUE );
 358
 359     return TRUE;
 360 }
 361
 362 void wxTextCtrl::CalculateScrollbar()
 363 {
 364     if ((m_windowStyle & wxTE_MULTILINE) == 0) return;
 365
 366     GtkAdjustment *adj = GTK_TEXT(m_text)->vadj;
 367
 368     if (adj->upper - adj->page_size < 0.8)
 369     {
 370         if (m_vScrollbarVisible)
 371         {
 372             gtk_widget_hide( m_vScrollbar );
 373             m_vScrollbarVisible = FALSE;
 374         }
 375     }
 376     else
 377     {
 378         if (!m_vScrollbarVisible)
 379         {
 380             gtk_widget_show( m_vScrollbar );
 381             m_vScrollbarVisible = TRUE;
 382         }
 383     }
 384 }
 385
 386 wxString wxTextCtrl::GetValue() const
 387 {
 388     wxCHECK_MSG( m_text != NULL, wxT(""), wxT("invalid text ctrl") );
 389
 390     wxString tmp;
 391     if (m_windowStyle & wxTE_MULTILINE)
 392     {
 393         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 394         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 395         tmp = wxString(text,*wxConvCurrent);
 396         g_free( text );
 397     }
 398     else
 399     {
 400         tmp = wxString(gtk_entry_get_text( GTK_ENTRY(m_text) ),*wxConvCurrent);
 401     }
 402     return tmp;
 403 }
 404
 405 void wxTextCtrl::SetValue( const wxString &value )
 406 {
 407     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 408
 409     if (m_windowStyle & wxTE_MULTILINE)
 410     {
 411         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 412         gtk_editable_delete_text( GTK_EDITABLE(m_text), 0, len );
 413         len = 0;
 414 #if wxUSE_UNICODE
 415         wxWX2MBbuf tmpbuf = value.mbc_str();
 416         gtk_editable_insert_text( GTK_EDITABLE(m_text), tmpbuf, strlen(tmpbuf), &len );
 417 #else
 418         gtk_editable_insert_text( GTK_EDITABLE(m_text), value.mbc_str(), value.Length(), &len );
 419 #endif
 420     }
 421     else
 422     {
 423         gtk_entry_set_text( GTK_ENTRY(m_text), value.mbc_str() );
 424     }
 425
 426     // GRG, Jun/2000: Changed this after a lot of discussion in
 427     //   the lists. wxWindows 2.2 will have a set of flags to
 428     //   customize this behaviour.
 429     SetInsertionPoint(0);
 430
 431     m_modified = FALSE;
 432 }
 433
 434 void wxTextCtrl::WriteText( const wxString &text )
 435 {
 436     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 437
 438     if ( text.empty() )
 439         return;
 440
 441 #if wxUSE_UNICODE
 442     wxWX2MBbuf buf = text.mbc_str();
 443     const char *txt = buf;
 444     size_t txtlen = strlen(buf);
 445 #else
 446     const char *txt = text;
 447     size_t txtlen = text.length();
 448 #endif
 449
 450     if ( m_windowStyle & wxTE_MULTILINE )
 451     {
 452         // After cursor movements, gtk_text_get_point() is wrong by one.
 453         gtk_text_set_point( GTK_TEXT(m_text), GET_EDITABLE_POS(m_text) );
 454
 455         // if we have any special style, use it
 456         if ( !m_defaultStyle.IsDefault() )
 457         {
 458             GetInsertionPoint();
 459
 460             wxGtkTextInsert(m_text, m_defaultStyle, txt, txtlen);
 461         }
 462         else // no style
 463         {
 464             gint len = GET_EDITABLE_POS(m_text);
 465             gtk_editable_insert_text( GTK_EDITABLE(m_text), txt, txtlen, &len );
 466         }
 467
 468         // Bring editable's cursor back uptodate.
 469         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 470     }
 471     else // single line
 472     {
 473         // This moves the cursor pos to behind the inserted text.
 474         gint len = GET_EDITABLE_POS(m_text);
 475         gtk_editable_insert_text( GTK_EDITABLE(m_text), txt, txtlen, &len );
 476
 477         // Bring editable's cursor uptodate.
 478         len += text.Len();
 479
 480         // Bring entry's cursor uptodate.
 481         gtk_entry_set_position( GTK_ENTRY(m_text), len );
 482     }
 483
 484     m_modified = TRUE;
 485 }
 486
 487 void wxTextCtrl::AppendText( const wxString &text )
 488 {
 489     SetInsertionPointEnd();
 490     WriteText( text );
 491 }
 492
 493 wxString wxTextCtrl::GetLineText( long lineNo ) const
 494 {
 495     if (m_windowStyle & wxTE_MULTILINE)
 496     {
 497         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 498         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 499
 500         if (text)
 501         {
 502             wxString buf(wxT(""));
 503             long i;
 504             int currentLine = 0;
 505             for (i = 0; currentLine != lineNo && text[i]; i++ )
 506                 if (text[i] == '\n')
 507             currentLine++;
 508             // Now get the text
 509             int j;
 510             for (j = 0; text[i] && text[i] != '\n'; i++, j++ )
 511                 buf += text[i];
 512
 513             g_free( text );
 514             return buf;
 515         }
 516         else
 517         {
 518             return wxEmptyString;
 519         }
 520     }
 521     else
 522     {
 523         if (lineNo == 0) return GetValue();
 524         return wxEmptyString;
 525     }
 526 }
 527
 528 void wxTextCtrl::OnDropFiles( wxDropFilesEvent &WXUNUSED(event) )
 529 {
 530   /* If you implement this, don't forget to update the documentation!
 531    * (file docs/latex/wx/text.tex) */
 532     wxFAIL_MSG( wxT("wxTextCtrl::OnDropFiles not implemented") );
 533 }
 534
 535 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y ) const
 536 {
 537     if ( m_windowStyle & wxTE_MULTILINE )
 538     {
 539         wxString text = GetValue();
 540
 541         // cast to prevent warning. But pos really should've been unsigned.
 542         if( (unsigned long)pos > text.Len()  )
 543             return FALSE;
 544
 545         *x=0;   // First Col
 546         *y=0;   // First Line
 547
 548         const wxChar* stop = text.c_str() + pos;
 549         for ( const wxChar *p = text.c_str(); p < stop; p++ )
 550         {
 551             if (*p == wxT('\n'))
 552             {
 553                 (*y)++;
 554                 *x=0;
 555             }
 556             else
 557                 (*x)++;
 558         }
 559     }
 560     else // single line control
 561     {
 562         if ( pos <= GTK_ENTRY(m_text)->text_length )
 563         {
 564             *y = 0;
 565             *x = pos;
 566         }
 567         else
 568         {
 569             // index out of bounds
 570             return FALSE;
 571         }
 572     }
 573
 574     return TRUE;
 575 }
 576
 577 long wxTextCtrl::XYToPosition(long x, long y ) const
 578 {
 579     if (!(m_windowStyle & wxTE_MULTILINE)) return 0;
 580
 581     long pos=0;
 582     for( int i=0; i<y; i++ ) pos += GetLineLength(i) + 1; // one for '\n'
 583
 584     pos += x;
 585     return pos;
 586 }
 587
 588 int wxTextCtrl::GetLineLength(long lineNo) const
 589 {
 590     wxString str = GetLineText (lineNo);
 591     return (int) str.Length();
 592 }
 593
 594 int wxTextCtrl::GetNumberOfLines() const
 595 {
 596     if (m_windowStyle & wxTE_MULTILINE)
 597     {
 598         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 599         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 600
 601         if (text)
 602         {
 603             int currentLine = 0;
 604             for (int i = 0; i < len; i++ )
 605             {
 606                 if (text[i] == '\n')
 607                     currentLine++;
 608             }
 609             g_free( text );
 610
 611             // currentLine is 0 based, add 1 to get number of lines
 612             return currentLine + 1;
 613         }
 614         else
 615         {
 616             return 0;
 617         }
 618     }
 619     else
 620     {
 621         return 1;
 622     }
 623 }
 624
 625 void wxTextCtrl::SetInsertionPoint( long pos )
 626 {
 627     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 628
 629     if (m_windowStyle & wxTE_MULTILINE)
 630     {
 631         /* seems to be broken in GTK 1.0.X:
 632            gtk_text_set_point( GTK_TEXT(m_text), (int)pos ); */
 633
 634         gtk_signal_disconnect_by_func( GTK_OBJECT(m_text),
 635           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 636
 637         /* we fake a set_point by inserting and deleting. as the user
 638            isn't supposed to get to know about thos non-sense, we
 639            disconnect so that no events are sent to the user program. */
 640
 641         gint tmp = (gint)pos;
 642         gtk_editable_insert_text( GTK_EDITABLE(m_text), " ", 1, &tmp );
 643         gtk_editable_delete_text( GTK_EDITABLE(m_text), tmp-1, tmp );
 644
 645         gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 646           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 647
 648         /* bring editable's cursor uptodate. another bug in GTK. */
 649
 650         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 651     }
 652     else
 653     {
 654         gtk_entry_set_position( GTK_ENTRY(m_text), (int)pos );
 655
 656         /* bring editable's cursor uptodate. bug in GTK. */
 657
 658         SET_EDITABLE_POS(m_text, (guint32)pos);
 659     }
 660 }
 661
 662 void wxTextCtrl::SetInsertionPointEnd()
 663 {
 664     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 665
 666     if (m_windowStyle & wxTE_MULTILINE)
 667         SetInsertionPoint(gtk_text_get_length(GTK_TEXT(m_text)));
 668     else
 669         gtk_entry_set_position( GTK_ENTRY(m_text), -1 );
 670 }
 671
 672 void wxTextCtrl::SetEditable( bool editable )
 673 {
 674     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 675
 676     if (m_windowStyle & wxTE_MULTILINE)
 677         gtk_text_set_editable( GTK_TEXT(m_text), editable );
 678     else
 679         gtk_entry_set_editable( GTK_ENTRY(m_text), editable );
 680 }
 681
 682 bool wxTextCtrl::Enable( bool enable )
 683 {
 684     if (!wxWindowBase::Enable(enable))
 685     {
 686         // nothing to do
 687         return FALSE;
 688     }
 689
 690     if (m_windowStyle & wxTE_MULTILINE)
 691     {
 692         gtk_text_set_editable( GTK_TEXT(m_text), enable );
 693         OnParentEnable(enable);
 694     }
 695     else
 696     {
 697         gtk_widget_set_sensitive( m_text, enable );
 698     }
 699
 700     return TRUE;
 701 }
 702
 703 // wxGTK-specific: called recursively by Enable,
 704 // to give widgets an oppprtunity to correct their colours after they
 705 // have been changed by Enable
 706 void wxTextCtrl::OnParentEnable( bool enable )
 707 {
 708     // If we have a custom background colour, we use this colour in both
 709     // disabled and enabled mode, or we end up with a different colour under the
 710     // text.
 711     wxColour oldColour = GetBackgroundColour();
 712     if (oldColour.Ok())
 713     {
 714         // Need to set twice or it'll optimize the useful stuff out
 715         if (oldColour == * wxWHITE)
 716             SetBackgroundColour(*wxBLACK);
 717         else
 718             SetBackgroundColour(*wxWHITE);
 719         SetBackgroundColour(oldColour);
 720     }
 721 }
 722
 723 void wxTextCtrl::DiscardEdits()
 724 {
 725     m_modified = FALSE;
 726 }
 727
 728 // ----------------------------------------------------------------------------
 729 // max text length support
 730 // ----------------------------------------------------------------------------
 731
 732 void wxTextCtrl::IgnoreNextTextUpdate()
 733 {
 734     m_ignoreNextUpdate = TRUE;
 735 }
 736
 737 bool wxTextCtrl::IgnoreTextUpdate()
 738 {
 739     if ( m_ignoreNextUpdate )
 740     {
 741         m_ignoreNextUpdate = FALSE;
 742
 743         return TRUE;
 744     }
 745
 746     return FALSE;
 747 }
 748
 749 void wxTextCtrl::SetMaxLength(unsigned long len)
 750 {
 751     if ( !HasFlag(wxTE_MULTILINE) )
 752     {
 753         gtk_entry_set_max_length(GTK_ENTRY(m_text), len);
 754
 755         // there is a bug in GTK+ 1.2.x: "changed" signal is emitted even if
 756         // we had tried to enter more text than allowed by max text length and
 757         // the text wasn't really changed
 758         //
 759         // to detect this and generate TEXT_MAXLEN event instead of
 760         // TEXT_CHANGED one in this case we also catch "insert_text" signal
 761         //
 762         // when max len is set to 0 we disconnect our handler as it means that
 763         // we shouldn't check anything any more
 764         if ( len )
 765         {
 766             gtk_signal_connect( GTK_OBJECT(m_text),
 767                                 "insert_text",
 768                                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 769                                 (gpointer)this);
 770         }
 771         else // no checking
 772         {
 773             gtk_signal_disconnect_by_func
 774             (
 775                 GTK_OBJECT(m_text),
 776                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 777                 (gpointer)this
 778             );
 779         }
 780     }
 781 }
 782
 783 void wxTextCtrl::SetSelection( long from, long to )
 784 {
 785     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 786
 787     if ( (m_windowStyle & wxTE_MULTILINE) &&
 788          !GTK_TEXT(m_text)->line_start_cache )
 789     {
 790         // tell the programmer that it didn't work
 791         wxLogDebug(_T("Can't call SetSelection() before realizing the control"));
 792         return;
 793     }
 794
 795     gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 796 }
 797
 798 void wxTextCtrl::ShowPosition( long pos )
 799 {
 800     if (m_windowStyle & wxTE_MULTILINE)
 801     {
 802         GtkAdjustment *vp = GTK_TEXT(m_text)->vadj;
 803         float totalLines =  (float) GetNumberOfLines();
 804         long posX;
 805         long posY;
 806         PositionToXY(pos, &posX, &posY);
 807         float posLine = (float) posY;
 808         float p = (posLine/totalLines)*(vp->upper - vp->lower) + vp->lower;
 809         gtk_adjustment_set_value(GTK_TEXT(m_text)->vadj, p);
 810     }
 811 }
 812
 813 long wxTextCtrl::GetInsertionPoint() const
 814 {
 815     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 816
 817     return (long) GET_EDITABLE_POS(m_text);
 818 }
 819
 820 long wxTextCtrl::GetLastPosition() const
 821 {
 822     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 823
 824     int pos = 0;
 825     if (m_windowStyle & wxTE_MULTILINE)
 826         pos = gtk_text_get_length( GTK_TEXT(m_text) );
 827     else
 828         pos = GTK_ENTRY(m_text)->text_length;
 829
 830     return (long)pos;
 831 }
 832
 833 void wxTextCtrl::Remove( long from, long to )
 834 {
 835     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 836
 837     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 838 }
 839
 840 void wxTextCtrl::Replace( long from, long to, const wxString &value )
 841 {
 842     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 843
 844     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 845
 846     if (!value.IsEmpty())
 847     {
 848         gint pos = (gint)from;
 849 #if wxUSE_UNICODE
 850         wxWX2MBbuf buf = value.mbc_str();
 851         gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &pos );
 852 #else
 853         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.Length(), &pos );
 854 #endif
 855     }
 856 }
 857
 858 void wxTextCtrl::Cut()
 859 {
 860     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 861
 862     gtk_editable_cut_clipboard( GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG );
 863 }
 864
 865 void wxTextCtrl::Copy()
 866 {
 867     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 868
 869     gtk_editable_copy_clipboard( GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG );
 870 }
 871
 872 void wxTextCtrl::Paste()
 873 {
 874     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 875
 876     gtk_editable_paste_clipboard( GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG );
 877 }
 878
 879 // Undo/redo
 880 void wxTextCtrl::Undo()
 881 {
 882     // TODO
 883     wxFAIL_MSG( wxT("wxTextCtrl::Undo not implemented") );
 884 }
 885
 886 void wxTextCtrl::Redo()
 887 {
 888     // TODO
 889     wxFAIL_MSG( wxT("wxTextCtrl::Redo not implemented") );
 890 }
 891
 892 bool wxTextCtrl::CanUndo() const
 893 {
 894     // TODO
 895     wxFAIL_MSG( wxT("wxTextCtrl::CanUndo not implemented") );
 896     return FALSE;
 897 }
 898
 899 bool wxTextCtrl::CanRedo() const
 900 {
 901     // TODO
 902     wxFAIL_MSG( wxT("wxTextCtrl::CanRedo not implemented") );
 903     return FALSE;
 904 }
 905
 906 // If the return values from and to are the same, there is no
 907 // selection.
 908 void wxTextCtrl::GetSelection(long* fromOut, long* toOut) const
 909 {
 910     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 911
 912     gint from, to;
 913 #ifdef __WXGTK20__
 914     if ( !gtk_editable_get_selection_bounds(GTK_EDITABLE(m_text), &from, &to) )
 915 #else
 916     if ( !(GTK_EDITABLE(m_text)->has_selection) )
 917 #endif
 918     {
 919         from =
 920         to = GetInsertionPoint();
 921     }
 922     else // got selection
 923     {
 924 #ifndef __WXGTK20__
 925         from = (long) GTK_EDITABLE(m_text)->selection_start_pos;
 926         to = (long) GTK_EDITABLE(m_text)->selection_end_pos;
 927 #endif
 928
 929         if ( from > to )
 930         {
 931             // exchange them to be compatible with wxMSW
 932             gint tmp = from;
 933             from = to;
 934             to = tmp;
 935         }
 936     }
 937
 938     if ( fromOut )
 939         *fromOut = from;
 940     if ( toOut )
 941         *toOut = to;
 942 }
 943
 944 bool wxTextCtrl::IsEditable() const
 945 {
 946     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
 947
 948 #ifdef __WXGTK20__
 949     return gtk_editable_get_editable(GTK_EDITABLE(m_text));
 950 #else
 951     return GTK_EDITABLE(m_text)->editable;
 952 #endif
 953 }
 954
 955 bool wxTextCtrl::IsModified() const
 956 {
 957     return m_modified;
 958 }
 959
 960 void wxTextCtrl::Clear()
 961 {
 962     SetValue( wxT("") );
 963 }
 964
 965 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
 966 {
 967     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 968
 969     if ((key_event.KeyCode() == WXK_RETURN) && (m_windowStyle & wxPROCESS_ENTER))
 970     {
 971         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 972         event.SetEventObject(this);
 973         event.SetString(GetValue());
 974         if (GetEventHandler()->ProcessEvent(event)) return;
 975     }
 976
 977     if ((key_event.KeyCode() == WXK_RETURN) && !(m_windowStyle & wxTE_MULTILINE))
 978     {
 979         // This will invoke the dialog default action, such
 980         // as the clicking the default button.
 981
 982         wxWindow *top_frame = m_parent;
 983         while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 984             top_frame = top_frame->GetParent();
 985
 986         if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 987         {
 988             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 989
 990             if (window->default_widget)
 991             {
 992                 gtk_widget_activate (window->default_widget);
 993                 return;
 994             }
 995         }
 996     }
 997
 998     key_event.Skip();
 999 }
1000
1001 GtkWidget* wxTextCtrl::GetConnectWidget()
1002 {
1003     return GTK_WIDGET(m_text);
1004 }
1005
1006 bool wxTextCtrl::IsOwnGtkWindow( GdkWindow *window )
1007 {
1008     if (m_windowStyle & wxTE_MULTILINE)
1009         return (window == GTK_TEXT(m_text)->text_area);
1010     else
1011         return (window == GTK_ENTRY(m_text)->text_area);
1012 }
1013
1014 // the font will change for subsequent text insertiongs
1015 bool wxTextCtrl::SetFont( const wxFont &font )
1016 {
1017     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
1018
1019     if ( !wxTextCtrlBase::SetFont(font) )
1020     {
1021         // font didn't change, nothing to do
1022         return FALSE;
1023     }
1024
1025     if ( m_windowStyle & wxTE_MULTILINE )
1026     {
1027         m_updateFont = TRUE;
1028
1029         m_defaultStyle.SetFont(font);
1030
1031         ChangeFontGlobally();
1032     }
1033
1034     return TRUE;
1035 }
1036
1037 void wxTextCtrl::ChangeFontGlobally()
1038 {
1039     // this method is very inefficient and hence should be called as rarely as
1040     // possible!
1041     wxASSERT_MSG( (m_windowStyle & wxTE_MULTILINE) && m_updateFont,
1042                   _T("shouldn't be called for single line controls") );
1043
1044     wxString value = GetValue();
1045     if ( !value.IsEmpty() )
1046     {
1047         m_updateFont = FALSE;
1048
1049         Clear();
1050         AppendText(value);
1051     }
1052 }
1053
1054 void wxTextCtrl::UpdateFontIfNeeded()
1055 {
1056     if ( m_updateFont )
1057         ChangeFontGlobally();
1058 }
1059
1060 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1061 {
1062     if ( !wxControl::SetForegroundColour(colour) )
1063         return FALSE;
1064
1065     // update default fg colour too
1066     m_defaultStyle.SetTextColour(colour);
1067
1068     return TRUE;
1069 }
1070
1071 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
1072 {
1073     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
1074
1075     if ( !wxControl::SetBackgroundColour( colour ) )
1076         return FALSE;
1077
1078     if (!m_widget->window)
1079         return FALSE;
1080
1081     wxColour sysbg = wxSystemSettings::GetColour( wxSYS_COLOUR_BTNFACE );
1082     if (sysbg.Red() == colour.Red() &&
1083         sysbg.Green() == colour.Green() &&
1084         sysbg.Blue() == colour.Blue())
1085     {
1086         return FALSE; // FIXME or TRUE?
1087     }
1088
1089     if (!m_backgroundColour.Ok())
1090         return FALSE;
1091
1092     if (m_windowStyle & wxTE_MULTILINE)
1093     {
1094         GdkWindow *window = GTK_TEXT(m_text)->text_area;
1095         if (!window)
1096             return FALSE;
1097         m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
1098         gdk_window_set_background( window, m_backgroundColour.GetColor() );
1099         gdk_window_clear( window );
1100     }
1101
1102     // change active background color too
1103     m_defaultStyle.SetBackgroundColour( colour );
1104
1105     return TRUE;
1106 }
1107
1108 bool wxTextCtrl::SetStyle( long start, long end, const wxTextAttr& style )
1109 {
1110     /* VERY dirty way to do that - removes the required text and re-adds it
1111        with styling (FIXME) */
1112     if ( m_windowStyle & wxTE_MULTILINE )
1113     {
1114         if ( style.IsDefault() )
1115         {
1116             // nothing to do
1117             return TRUE;
1118         }
1119
1120         gint l = gtk_text_get_length( GTK_TEXT(m_text) );
1121
1122         wxCHECK_MSG( start >= 0 && end <= l, FALSE,
1123                      _T("invalid range in wxTextCtrl::SetStyle") );
1124
1125         gint old_pos = gtk_editable_get_position( GTK_EDITABLE(m_text) );
1126         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), start, end );
1127         wxString tmp(text,*wxConvCurrent);
1128         g_free( text );
1129
1130         gtk_editable_delete_text( GTK_EDITABLE(m_text), start, end );
1131         gtk_editable_set_position( GTK_EDITABLE(m_text), start );
1132
1133 #if wxUSE_UNICODE
1134         wxWX2MBbuf buf = tmp.mbc_str();
1135         const char *txt = buf;
1136         size_t txtlen = strlen(buf);
1137 #else
1138         const char *txt = tmp;
1139         size_t txtlen = tmp.length();
1140 #endif
1141
1142         // use the attributes from style which are set in it and fall back
1143         // first to the default style and then to the text control default
1144         // colours for the others
1145         wxGtkTextInsert(m_text,
1146                         wxTextAttr::Combine(style, m_defaultStyle, this),
1147                         txt,
1148                         txtlen);
1149
1150         /* does not seem to help under GTK+ 1.2 !!!
1151         gtk_editable_set_position( GTK_EDITABLE(m_text), old_pos ); */
1152         SetInsertionPoint( old_pos );
1153         return TRUE;
1154     }
1155     else // singe line
1156     {
1157         // cannot do this for GTK+'s Entry widget
1158         return FALSE;
1159     }
1160 }
1161
1162 void wxTextCtrl::ApplyWidgetStyle()
1163 {
1164     if (m_windowStyle & wxTE_MULTILINE)
1165     {
1166         // how ?
1167     }
1168     else
1169     {
1170         SetWidgetStyle();
1171         gtk_widget_set_style( m_text, m_widgetStyle );
1172     }
1173 }
1174
1175 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1176 {
1177     Cut();
1178 }
1179
1180 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1181 {
1182     Copy();
1183 }
1184
1185 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1186 {
1187     Paste();
1188 }
1189
1190 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1191 {
1192     Undo();
1193 }
1194
1195 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1196 {
1197     Redo();
1198 }
1199
1200 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1201 {
1202     event.Enable( CanCut() );
1203 }
1204
1205 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1206 {
1207     event.Enable( CanCopy() );
1208 }
1209
1210 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1211 {
1212     event.Enable( CanPaste() );
1213 }
1214
1215 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1216 {
1217     event.Enable( CanUndo() );
1218 }
1219
1220 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1221 {
1222     event.Enable( CanRedo() );
1223 }
1224
1225 void wxTextCtrl::OnInternalIdle()
1226 {
1227     wxCursor cursor = m_cursor;
1228     if (g_globalCursor.Ok()) cursor = g_globalCursor;
1229
1230     if (cursor.Ok())
1231     {
1232         GdkWindow *window = (GdkWindow*) NULL;
1233         if (HasFlag(wxTE_MULTILINE))
1234             window = GTK_TEXT(m_text)->text_area;
1235         else
1236             window = GTK_ENTRY(m_text)->text_area;
1237
1238         if (window)
1239             gdk_window_set_cursor( window, cursor.GetCursor() );
1240
1241         if (!g_globalCursor.Ok())
1242             cursor = *wxSTANDARD_CURSOR;
1243
1244         window = m_widget->window;
1245         if ((window) && !(GTK_WIDGET_NO_WINDOW(m_widget)))
1246             gdk_window_set_cursor( window, cursor.GetCursor() );
1247     }
1248
1249     if (g_delayedFocus == this)
1250     {
1251         if (GTK_WIDGET_REALIZED(m_widget))
1252         {
1253             gtk_widget_grab_focus( m_widget );
1254             g_delayedFocus = NULL;
1255         }
1256     }
1257
1258     UpdateWindowUI();
1259 }
1260
1261 wxSize wxTextCtrl::DoGetBestSize() const
1262 {
1263     // FIXME should be different for multi-line controls...
1264     wxSize ret( wxControl::DoGetBestSize() );
1265     return wxSize(80, ret.y);
1266 }
1267
1268 // ----------------------------------------------------------------------------
1269 // freeze/thaw
1270 // ----------------------------------------------------------------------------
1271
1272 void wxTextCtrl::Freeze()
1273 {
1274     if ( HasFlag(wxTE_MULTILINE) )
1275     {
1276         gtk_text_freeze(GTK_TEXT(m_text));
1277     }
1278 }
1279
1280 void wxTextCtrl::Thaw()
1281 {
1282     if ( HasFlag(wxTE_MULTILINE) )
1283     {
1284         GTK_TEXT(m_text)->vadj->value = 0.0;
1285
1286         gtk_text_thaw(GTK_TEXT(m_text));
1287     }
1288 }
1289
1290 // ----------------------------------------------------------------------------
1291 // scrolling
1292 // ----------------------------------------------------------------------------
1293
1294 GtkAdjustment *wxTextCtrl::GetVAdj() const
1295 {
1296     return HasFlag(wxTE_MULTILINE) ? GTK_TEXT(m_text)->vadj : NULL;
1297 }
1298
1299 bool wxTextCtrl::DoScroll(GtkAdjustment *adj, int diff)
1300 {
1301     float value = adj->value + diff;
1302
1303     if ( value < 0 )
1304         value = 0;
1305
1306     float upper = adj->upper - adj->page_size;
1307     if ( value > upper )
1308         value = upper;
1309
1310     // did we noticeably change the scroll position?
1311     if ( fabs(adj->value - value) < 0.2 )
1312     {
1313         // well, this is what Robert does in wxScrollBar, so it must be good...
1314         return FALSE;
1315     }
1316
1317     adj->value = value;
1318
1319     gtk_signal_emit_by_name(GTK_OBJECT(adj), "value_changed");
1320
1321     return TRUE;
1322 }
1323
1324 bool wxTextCtrl::ScrollLines(int lines)
1325 {
1326     GtkAdjustment *adj = GetVAdj();
1327     if ( !adj )
1328         return FALSE;
1329
1330     // this is hardcoded to 10 in GTK+ 1.2 (great idea)
1331     static const int KEY_SCROLL_PIXELS = 10;
1332
1333     return DoScroll(adj, lines*KEY_SCROLL_PIXELS);
1334 }
1335
1336 bool wxTextCtrl::ScrollPages(int pages)
1337 {
1338     GtkAdjustment *adj = GetVAdj();
1339     if ( !adj )
1340         return FALSE;
1341
1342     return DoScroll(adj, (int)ceil(pages*adj->page_increment));
1343 }
1344