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/settings.h"
  18
  19 #include <sys/types.h>
  20 #include <sys/stat.h>
  21 #include <ctype.h>
  22
  23 #include "gdk/gdk.h"
  24 #include "gtk/gtk.h"
  25 #include "gdk/gdkkeysyms.h"
  26
  27 //-----------------------------------------------------------------------------
  28 // idle system
  29 //-----------------------------------------------------------------------------
  30
  31 extern void wxapp_install_idle_handler();
  32 extern bool g_isIdle;
  33
  34 //-----------------------------------------------------------------------------
  35 // data
  36 //-----------------------------------------------------------------------------
  37
  38 extern bool       g_blockEventsOnDrag;
  39 extern wxCursor   g_globalCursor;
  40
  41 //-----------------------------------------------------------------------------
  42 //  "changed"
  43 //-----------------------------------------------------------------------------
  44
  45 static void
  46 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
  47 {
  48     if (!win->m_hasVMT) return;
  49
  50     if (g_isIdle)
  51         wxapp_install_idle_handler();
  52
  53     win->SetModified();
  54
  55     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
  56     event.SetString( win->GetValue() );
  57     event.SetEventObject( win );
  58     win->GetEventHandler()->ProcessEvent( event );
  59 }
  60
  61 //-----------------------------------------------------------------------------
  62 // "changed" from vertical scrollbar
  63 //-----------------------------------------------------------------------------
  64
  65 static void
  66 gtk_scrollbar_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
  67 {
  68     if (!win->m_hasVMT) return;
  69
  70     if (g_isIdle)
  71         wxapp_install_idle_handler();
  72
  73     win->CalculateScrollbar();
  74 }
  75
  76 //-----------------------------------------------------------------------------
  77 //  wxTextCtrl
  78 //-----------------------------------------------------------------------------
  79
  80 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl,wxControl)
  81
  82 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  83     EVT_CHAR(wxTextCtrl::OnChar)
  84
  85     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
  86     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
  87     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
  88     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
  89     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
  90
  91     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
  92     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
  93     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
  94     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
  95     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
  96 END_EVENT_TABLE()
  97
  98 wxTextCtrl::wxTextCtrl()
  99 {
 100     m_modified = FALSE;
 101 }
 102
 103 wxTextCtrl::wxTextCtrl( wxWindow *parent, wxWindowID id, const wxString &value,
 104       const wxPoint &pos, const wxSize &size,
 105       int style, const wxValidator& validator, const wxString &name )
 106 {
 107     m_modified = FALSE;
 108     Create( parent, id, value, pos, size, style, validator, name );
 109 }
 110
 111 bool wxTextCtrl::Create( wxWindow *parent, wxWindowID id, const wxString &value,
 112       const wxPoint &pos, const wxSize &size,
 113       int style, const wxValidator& validator, const wxString &name )
 114 {
 115     m_needParent = TRUE;
 116     m_acceptsFocus = TRUE;
 117
 118     if (!PreCreation( parent, pos, size ) ||
 119         !CreateBase( parent, id, pos, size, style, validator, name ))
 120     {
 121         wxFAIL_MSG( T("wxTextCtrl creation failed") );
 122         return FALSE;
 123     }
 124
 125
 126     m_vScrollbarVisible = FALSE;
 127
 128     bool multi_line = (style & wxTE_MULTILINE) != 0;
 129     if (multi_line)
 130     {
 131 #if (GTK_MINOR_VERSION > 2)
 132         /* a multi-line edit control: create a vertical scrollbar by default and
 133            horizontal if requested */
 134         bool bHasHScrollbar = (style & wxHSCROLL) != 0;
 135 #else
 136         bool bHasHScrollbar = FALSE;
 137 #endif
 138
 139         /* create our control ... */
 140         m_text = gtk_text_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
 141
 142         /* ... and put into the upper left hand corner of the table */
 143         m_widget = gtk_table_new(bHasHScrollbar ? 2 : 1, 2, FALSE);
 144         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 145         gtk_table_attach( GTK_TABLE(m_widget), m_text, 0, 1, 0, 1,
 146                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 147                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 148                        0, 0);
 149
 150         /* always wrap words */
 151         gtk_text_set_word_wrap( GTK_TEXT(m_text), TRUE );
 152
 153 #if (GTK_MINOR_VERSION > 2)
 154         /* put the horizontal scrollbar in the lower left hand corner */
 155         if (bHasHScrollbar)
 156         {
 157             GtkWidget *hscrollbar = gtk_hscrollbar_new(GTK_TEXT(m_text)->hadj);
 158             GTK_WIDGET_UNSET_FLAGS( hscrollbar, GTK_CAN_FOCUS );
 159             gtk_table_attach(GTK_TABLE(m_widget), hscrollbar, 0, 1, 1, 2,
 160                        (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 161                        GTK_FILL,
 162                        0, 0);
 163             gtk_widget_show(hscrollbar);
 164
 165             /* don't wrap lines, otherwise we wouldn't need the scrollbar */
 166             gtk_text_set_line_wrap( GTK_TEXT(m_text), FALSE );
 167         }
 168 #endif
 169
 170         /* finally, put the vertical scrollbar in the upper right corner */
 171         m_vScrollbar = gtk_vscrollbar_new( GTK_TEXT(m_text)->vadj );
 172         GTK_WIDGET_UNSET_FLAGS( m_vScrollbar, GTK_CAN_FOCUS );
 173         gtk_table_attach(GTK_TABLE(m_widget), m_vScrollbar, 1, 2, 0, 1,
 174                      GTK_FILL,
 175                      (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 176                      0, 0);
 177     }
 178     else
 179     {
 180         /* a single-line text control: no need for scrollbars */
 181         m_widget =
 182           m_text = gtk_entry_new();
 183     }
 184
 185     wxSize newSize = size;
 186     if (newSize.x == -1) newSize.x = 80;
 187     if (newSize.y == -1) newSize.y = 26;
 188     SetSize( newSize.x, newSize.y );
 189
 190     m_parent->DoAddChild( this );
 191
 192     PostCreation();
 193
 194     if (multi_line)
 195         gtk_widget_show(m_text);
 196
 197     /* we want to be notified about text changes */
 198     gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 199       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 200
 201     if (multi_line)
 202     {
 203         gtk_signal_connect(GTK_OBJECT(GTK_TEXT(m_text)->vadj), "changed",
 204           (GtkSignalFunc) gtk_scrollbar_changed_callback, (gpointer) this );
 205     }
 206
 207     if (!value.IsEmpty())
 208     {
 209         gint tmp = 0;
 210
 211 #if GTK_MINOR_VERSION == 0
 212         // if we don't realize it, GTK 1.0.6 dies with a SIGSEGV in
 213         // gtk_editable_insert_text()
 214         gtk_widget_realize(m_text);
 215 #endif // GTK 1.0
 216
 217 #if wxUSE_UNICODE
 218         wxWX2MBbuf val = value.mbc_str();
 219         gtk_editable_insert_text( GTK_EDITABLE(m_text), val, strlen(val), &tmp );
 220 #else // !Unicode
 221         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.Length(), &tmp );
 222 #endif // Unicode/!Unicode
 223
 224         if (multi_line)
 225         {
 226             /* bring editable's cursor uptodate. bug in GTK. */
 227
 228             GTK_EDITABLE(m_text)->current_pos = gtk_text_get_point( GTK_TEXT(m_text) );
 229         }
 230     }
 231
 232     if (style & wxTE_PASSWORD)
 233     {
 234         if (!multi_line)
 235             gtk_entry_set_visibility( GTK_ENTRY(m_text), FALSE );
 236     }
 237
 238     if (style & wxTE_READONLY)
 239     {
 240         if (!multi_line)
 241             gtk_entry_set_editable( GTK_ENTRY(m_text), FALSE );
 242     }
 243     else
 244     {
 245         if (multi_line)
 246             gtk_text_set_editable( GTK_TEXT(m_text), 1 );
 247     }
 248
 249     SetBackgroundColour( wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW) );
 250     SetForegroundColour( parent->GetForegroundColour() );
 251
 252     m_cursor = wxCursor( wxCURSOR_IBEAM );
 253
 254     Show( TRUE );
 255
 256     return TRUE;
 257 }
 258
 259 void wxTextCtrl::CalculateScrollbar()
 260 {
 261     if ((m_windowStyle & wxTE_MULTILINE) == 0) return;
 262
 263     GtkAdjustment *adj = GTK_TEXT(m_text)->vadj;
 264
 265     if (adj->upper - adj->page_size < 0.8)
 266     {
 267         if (m_vScrollbarVisible)
 268         {
 269             gtk_widget_hide( m_vScrollbar );
 270             m_vScrollbarVisible = FALSE;
 271         }
 272     }
 273     else
 274     {
 275         if (!m_vScrollbarVisible)
 276         {
 277             gtk_widget_show( m_vScrollbar );
 278             m_vScrollbarVisible = TRUE;
 279         }
 280     }
 281 }
 282
 283 wxString wxTextCtrl::GetValue() const
 284 {
 285     wxCHECK_MSG( m_text != NULL, T(""), T("invalid text ctrl") );
 286
 287     wxString tmp;
 288     if (m_windowStyle & wxTE_MULTILINE)
 289     {
 290         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 291         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 292         tmp = wxString(text,*wxConvCurrent);
 293         g_free( text );
 294     }
 295     else
 296     {
 297         tmp = wxString(gtk_entry_get_text( GTK_ENTRY(m_text) ),*wxConvCurrent);
 298     }
 299     return tmp;
 300 }
 301
 302 void wxTextCtrl::SetValue( const wxString &value )
 303 {
 304     wxCHECK_RET( m_text != NULL, T("invalid text ctrl") );
 305
 306     wxString tmp = T("");
 307     if (!value.IsNull()) tmp = value;
 308     if (m_windowStyle & wxTE_MULTILINE)
 309     {
 310         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 311         gtk_editable_delete_text( GTK_EDITABLE(m_text), 0, len );
 312         len = 0;
 313 #if wxUSE_UNICODE
 314         wxWX2MBbuf tmpbuf = tmp.mbc_str();
 315         gtk_editable_insert_text( GTK_EDITABLE(m_text), tmpbuf, strlen(tmpbuf), &len );
 316 #else
 317         gtk_editable_insert_text( GTK_EDITABLE(m_text), tmp.mbc_str(), tmp.Length(), &len );
 318 #endif
 319     }
 320     else
 321     {
 322         gtk_entry_set_text( GTK_ENTRY(m_text), tmp.mbc_str() );
 323     }
 324 }
 325
 326 void wxTextCtrl::WriteText( const wxString &text )
 327 {
 328     wxCHECK_RET( m_text != NULL, T("invalid text ctrl") );
 329
 330     if (text.IsEmpty()) return;
 331
 332     if (m_windowStyle & wxTE_MULTILINE)
 333     {
 334         /* this moves the cursor pos to behind the inserted text */
 335         gint len = GTK_EDITABLE(m_text)->current_pos;
 336
 337 #if wxUSE_UNICODE
 338         wxWX2MBbuf buf = text.mbc_str();
 339         gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &len );
 340 #else
 341         gtk_editable_insert_text( GTK_EDITABLE(m_text), text, text.Length(), &len );
 342 #endif
 343
 344         /* bring editable's cursor uptodate. bug in GTK. */
 345         GTK_EDITABLE(m_text)->current_pos = gtk_text_get_point( GTK_TEXT(m_text) );
 346     }
 347     else
 348     {
 349         /* this moves the cursor pos to behind the inserted text */
 350         gint len = GTK_EDITABLE(m_text)->current_pos;
 351 #if wxUSE_UNICODE
 352         wxWX2MBbuf buf = text.mbc_str();
 353         gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &len );
 354 #else
 355         gtk_editable_insert_text( GTK_EDITABLE(m_text), text, text.Length(), &len );
 356 #endif
 357
 358         /* bring editable's cursor uptodate. bug in GTK. */
 359         GTK_EDITABLE(m_text)->current_pos += text.Len();
 360
 361         /* bring entry's cursor uptodate. bug in GTK. */
 362         gtk_entry_set_position( GTK_ENTRY(m_text), GTK_EDITABLE(m_text)->current_pos );
 363     }
 364 }
 365
 366 void wxTextCtrl::AppendText( const wxString &text )
 367 {
 368     wxCHECK_RET( m_text != NULL, T("invalid text ctrl") );
 369
 370     if (text.IsEmpty()) return;
 371
 372     if (m_windowStyle & wxTE_MULTILINE)
 373     {
 374         bool hasSpecialAttributes = m_font.Ok() ||
 375                                     m_foregroundColour.Ok() ||
 376                                     m_backgroundColour.Ok();
 377         if ( hasSpecialAttributes )
 378         {
 379              gtk_text_insert( GTK_TEXT(m_text),
 380                               m_font.GetInternalFont(),
 381                               m_foregroundColour.GetColor(),
 382                               m_backgroundColour.GetColor(),
 383                               text.mbc_str(), text.length());
 384
 385         }
 386         else
 387         {
 388             /* we'll insert at the last position */
 389             gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 390 #if wxUSE_UNICODE
 391             wxWX2MBbuf buf = text.mbc_str();
 392             gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &len );
 393 #else
 394             gtk_editable_insert_text( GTK_EDITABLE(m_text), text, text.Length(), &len );
 395 #endif
 396         }
 397
 398         /* bring editable's cursor uptodate. bug in GTK. */
 399         GTK_EDITABLE(m_text)->current_pos = gtk_text_get_point( GTK_TEXT(m_text) );
 400     }
 401     else
 402     {
 403         gtk_entry_append_text( GTK_ENTRY(m_text), text.mbc_str() );
 404     }
 405 }
 406
 407 wxString wxTextCtrl::GetLineText( long lineNo ) const
 408 {
 409   if (m_windowStyle & wxTE_MULTILINE)
 410   {
 411     gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 412     char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 413
 414     if (text)
 415     {
 416         wxString buf(T(""));
 417         long i;
 418         int currentLine = 0;
 419         for (i = 0; currentLine != lineNo && text[i]; i++ )
 420           if (text[i] == '\n')
 421             currentLine++;
 422         // Now get the text
 423         int j;
 424         for (j = 0; text[i] && text[i] != '\n'; i++, j++ )
 425             buf += text[i];
 426
 427         g_free( text );
 428         return buf;
 429     }
 430     else
 431       return wxEmptyString;
 432   }
 433   else
 434   {
 435     if (lineNo == 0) return GetValue();
 436     return wxEmptyString;
 437   }
 438 }
 439
 440 void wxTextCtrl::OnDropFiles( wxDropFilesEvent &WXUNUSED(event) )
 441 {
 442   /* If you implement this, don't forget to update the documentation!
 443    * (file docs/latex/wx/text.tex) */
 444     wxFAIL_MSG( T("wxTextCtrl::OnDropFiles not implemented") );
 445 }
 446
 447 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y ) const
 448 {
 449     if ( m_windowStyle & wxTE_MULTILINE )
 450     {
 451         wxString text = GetValue();
 452
 453         // cast to prevent warning. But pos really should've been unsigned.
 454         if( (unsigned long)pos > text.Len()  )
 455             return FALSE;
 456
 457         *x=0;   // First Col
 458         *y=0;   // First Line
 459
 460         const wxChar* stop = text.c_str() + pos;
 461         for ( const wxChar *p = text.c_str(); p < stop; p++ )
 462         {
 463             if (*p == T('\n'))
 464             {
 465                 (*y)++;
 466                 *x=0;
 467             }
 468             else
 469                 (*x)++;
 470         }
 471     }
 472     else // single line control
 473     {
 474         if ( pos <= GTK_ENTRY(m_text)->text_length )
 475         {
 476             *y = 0;
 477             *x = pos;
 478         }
 479         else
 480         {
 481             // index out of bounds
 482             return FALSE;
 483         }
 484     }
 485
 486     return TRUE;
 487 }
 488
 489 long wxTextCtrl::XYToPosition(long x, long y ) const
 490 {
 491     if (!(m_windowStyle & wxTE_MULTILINE)) return 0;
 492
 493     long pos=0;
 494     for( int i=0; i<y; i++ ) pos += GetLineLength(i) + 1; // one for '\n'
 495
 496     pos += x;
 497     return pos;
 498 }
 499
 500 int wxTextCtrl::GetLineLength(long lineNo) const
 501 {
 502     wxString str = GetLineText (lineNo);
 503     return (int) str.Length();
 504 }
 505
 506 int wxTextCtrl::GetNumberOfLines() const
 507 {
 508     if (m_windowStyle & wxTE_MULTILINE)
 509     {
 510         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 511         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 512
 513         if (text)
 514         {
 515             int currentLine = 0;
 516             for (int i = 0; i < len; i++ )
 517             {
 518                 if (text[i] == '\n')
 519                     currentLine++;
 520             }
 521             g_free( text );
 522
 523             // currentLine is 0 based, add 1 to get number of lines
 524             return currentLine + 1;
 525         }
 526         else
 527         {
 528             return 0;
 529         }
 530     }
 531     else
 532     {
 533         return 1;
 534     }
 535 }
 536
 537 void wxTextCtrl::SetInsertionPoint( long pos )
 538 {
 539     wxCHECK_RET( m_text != NULL, T("invalid text ctrl") );
 540
 541     if (m_windowStyle & wxTE_MULTILINE)
 542     {
 543         /* seems to be broken in GTK 1.0.X:
 544            gtk_text_set_point( GTK_TEXT(m_text), (int)pos ); */
 545
 546         gtk_signal_disconnect_by_func( GTK_OBJECT(m_text),
 547           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 548
 549         /* we fake a set_point by inserting and deleting. as the user
 550            isn't supposed to get to know about thos non-sense, we
 551            disconnect so that no events are sent to the user program. */
 552
 553         gint tmp = (gint)pos;
 554         gtk_editable_insert_text( GTK_EDITABLE(m_text), " ", 1, &tmp );
 555         gtk_editable_delete_text( GTK_EDITABLE(m_text), tmp-1, tmp );
 556
 557         gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 558           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 559
 560         /* bring editable's cursor uptodate. another bug in GTK. */
 561
 562         GTK_EDITABLE(m_text)->current_pos = gtk_text_get_point( GTK_TEXT(m_text) );
 563     }
 564     else
 565     {
 566         gtk_entry_set_position( GTK_ENTRY(m_text), (int)pos );
 567
 568         /* bring editable's cursor uptodate. bug in GTK. */
 569
 570         GTK_EDITABLE(m_text)->current_pos = pos;
 571     }
 572 }
 573
 574 void wxTextCtrl::SetInsertionPointEnd()
 575 {
 576     wxCHECK_RET( m_text != NULL, T("invalid text ctrl") );
 577
 578     if (m_windowStyle & wxTE_MULTILINE)
 579         SetInsertionPoint(gtk_text_get_length(GTK_TEXT(m_text)));
 580     else
 581         gtk_entry_set_position( GTK_ENTRY(m_text), -1 );
 582 }
 583
 584 void wxTextCtrl::SetEditable( bool editable )
 585 {
 586     wxCHECK_RET( m_text != NULL, T("invalid text ctrl") );
 587
 588     if (m_windowStyle & wxTE_MULTILINE)
 589         gtk_text_set_editable( GTK_TEXT(m_text), editable );
 590     else
 591         gtk_entry_set_editable( GTK_ENTRY(m_text), editable );
 592 }
 593
 594 void wxTextCtrl::DiscardEdits()
 595 {
 596     m_modified = FALSE;
 597 }
 598
 599 void wxTextCtrl::SetSelection( long from, long to )
 600 {
 601     wxCHECK_RET( m_text != NULL, T("invalid text ctrl") );
 602
 603     gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 604 }
 605
 606 void wxTextCtrl::ShowPosition( long WXUNUSED(pos) )
 607 {
 608 //    SetInsertionPoint( pos );
 609 }
 610
 611 long wxTextCtrl::GetInsertionPoint() const
 612 {
 613     wxCHECK_MSG( m_text != NULL, 0, T("invalid text ctrl") );
 614
 615     return (long) GTK_EDITABLE(m_text)->current_pos;
 616 }
 617
 618 long wxTextCtrl::GetLastPosition() const
 619 {
 620     wxCHECK_MSG( m_text != NULL, 0, T("invalid text ctrl") );
 621
 622     int pos = 0;
 623     if (m_windowStyle & wxTE_MULTILINE)
 624         pos = gtk_text_get_length( GTK_TEXT(m_text) );
 625     else
 626         pos = GTK_ENTRY(m_text)->text_length;
 627
 628     return (long)pos;
 629 }
 630
 631 void wxTextCtrl::Remove( long from, long to )
 632 {
 633     wxCHECK_RET( m_text != NULL, T("invalid text ctrl") );
 634
 635     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 636 }
 637
 638 void wxTextCtrl::Replace( long from, long to, const wxString &value )
 639 {
 640     wxCHECK_RET( m_text != NULL, T("invalid text ctrl") );
 641
 642     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 643
 644     if (!value.IsEmpty())
 645     {
 646         gint pos = (gint)from;
 647 #if wxUSE_UNICODE
 648         wxWX2MBbuf buf = value.mbc_str();
 649         gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &pos );
 650 #else
 651         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.Length(), &pos );
 652 #endif
 653     }
 654 }
 655
 656 void wxTextCtrl::Cut()
 657 {
 658     wxCHECK_RET( m_text != NULL, T("invalid text ctrl") );
 659
 660 #if (GTK_MINOR_VERSION > 0)
 661     gtk_editable_cut_clipboard( GTK_EDITABLE(m_text) );
 662 #else
 663     gtk_editable_cut_clipboard( GTK_EDITABLE(m_text), 0 );
 664 #endif
 665 }
 666
 667 void wxTextCtrl::Copy()
 668 {
 669     wxCHECK_RET( m_text != NULL, T("invalid text ctrl") );
 670
 671 #if (GTK_MINOR_VERSION > 0)
 672     gtk_editable_copy_clipboard( GTK_EDITABLE(m_text) );
 673 #else
 674     gtk_editable_copy_clipboard( GTK_EDITABLE(m_text), 0 );
 675 #endif
 676 }
 677
 678 void wxTextCtrl::Paste()
 679 {
 680     wxCHECK_RET( m_text != NULL, T("invalid text ctrl") );
 681
 682 #if (GTK_MINOR_VERSION > 0)
 683     gtk_editable_paste_clipboard( GTK_EDITABLE(m_text) );
 684 #else
 685     gtk_editable_paste_clipboard( GTK_EDITABLE(m_text), 0 );
 686 #endif
 687 }
 688
 689 bool wxTextCtrl::CanCopy() const
 690 {
 691     // Can copy if there's a selection
 692     long from, to;
 693     GetSelection(& from, & to);
 694     return (from != to) ;
 695 }
 696
 697 bool wxTextCtrl::CanCut() const
 698 {
 699     // Can cut if there's a selection
 700     long from, to;
 701     GetSelection(& from, & to);
 702     return (from != to) ;
 703 }
 704
 705 bool wxTextCtrl::CanPaste() const
 706 {
 707     return IsEditable() ;
 708 }
 709
 710 // Undo/redo
 711 void wxTextCtrl::Undo()
 712 {
 713     // TODO
 714     wxFAIL_MSG( T("wxTextCtrl::Undo not implemented") );
 715 }
 716
 717 void wxTextCtrl::Redo()
 718 {
 719     // TODO
 720     wxFAIL_MSG( T("wxTextCtrl::Redo not implemented") );
 721 }
 722
 723 bool wxTextCtrl::CanUndo() const
 724 {
 725     // TODO
 726     wxFAIL_MSG( T("wxTextCtrl::CanUndo not implemented") );
 727     return FALSE;
 728 }
 729
 730 bool wxTextCtrl::CanRedo() const
 731 {
 732     // TODO
 733     wxFAIL_MSG( T("wxTextCtrl::CanRedo not implemented") );
 734     return FALSE;
 735 }
 736
 737 // If the return values from and to are the same, there is no
 738 // selection.
 739 void wxTextCtrl::GetSelection(long* from, long* to) const
 740 {
 741     wxCHECK_RET( m_text != NULL, T("invalid text ctrl") );
 742
 743     if (!(GTK_EDITABLE(m_text)->has_selection))
 744     {
 745         if (from) *from = 0;
 746         if (to)   *to = 0;
 747         return;
 748     }
 749
 750     if (from) *from = (long) GTK_EDITABLE(m_text)->selection_start_pos;
 751     if (to)   *to = (long) GTK_EDITABLE(m_text)->selection_end_pos;
 752 }
 753
 754 bool wxTextCtrl::IsEditable() const
 755 {
 756     wxCHECK_MSG( m_text != NULL, FALSE, T("invalid text ctrl") );
 757
 758     return GTK_EDITABLE(m_text)->editable;
 759 }
 760
 761 bool wxTextCtrl::IsModified() const
 762 {
 763     return m_modified;
 764 }
 765
 766 void wxTextCtrl::Clear()
 767 {
 768     SetValue( T("") );
 769 }
 770
 771 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
 772 {
 773     wxCHECK_RET( m_text != NULL, T("invalid text ctrl") );
 774
 775     if ((key_event.KeyCode() == WXK_RETURN) && (m_windowStyle & wxPROCESS_ENTER))
 776     {
 777         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 778         event.SetEventObject(this);
 779         if (GetEventHandler()->ProcessEvent(event)) return;
 780     }
 781
 782     key_event.Skip();
 783 }
 784
 785 GtkWidget* wxTextCtrl::GetConnectWidget()
 786 {
 787     return GTK_WIDGET(m_text);
 788 }
 789
 790 bool wxTextCtrl::IsOwnGtkWindow( GdkWindow *window )
 791 {
 792     if (m_windowStyle & wxTE_MULTILINE)
 793         return (window == GTK_TEXT(m_text)->text_area);
 794     else
 795         return (window == GTK_ENTRY(m_text)->text_area);
 796 }
 797
 798 // the font will change for subsequent text insertiongs
 799 bool wxTextCtrl::SetFont( const wxFont &font )
 800 {
 801     wxCHECK_MSG( m_text != NULL, FALSE, T("invalid text ctrl") );
 802
 803     if ( !wxWindowBase::SetFont(font) )
 804     {
 805         // font didn't change, nothing to do
 806         return FALSE;
 807     }
 808
 809     if ( m_windowStyle & wxTE_MULTILINE )
 810     {
 811         // for compatibility with other ports: the font is a global controls
 812         // characteristic, so change the font globally
 813         wxString value = GetValue();
 814         if ( !value.IsEmpty() )
 815         {
 816             Clear();
 817
 818             AppendText(value);
 819         }
 820     }
 821
 822     return TRUE;
 823 }
 824
 825 bool wxTextCtrl::SetForegroundColour( const wxColour &WXUNUSED(colour) )
 826 {
 827     wxCHECK_MSG( m_text != NULL, FALSE, T("invalid text ctrl") );
 828
 829     // doesn't work
 830     return FALSE;
 831 }
 832
 833 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
 834 {
 835     wxCHECK_MSG( m_text != NULL, FALSE, T("invalid text ctrl") );
 836
 837     wxControl::SetBackgroundColour( colour );
 838
 839     if (!m_widget->window)
 840         return FALSE;
 841
 842     wxColour sysbg = wxSystemSettings::GetSystemColour( wxSYS_COLOUR_BTNFACE );
 843     if (sysbg.Red() == colour.Red() &&
 844         sysbg.Green() == colour.Green() &&
 845         sysbg.Blue() == colour.Blue())
 846     {
 847         return FALSE; // FIXME or TRUE?
 848     }
 849
 850     if (!m_backgroundColour.Ok())
 851         return FALSE;
 852
 853     if (m_windowStyle & wxTE_MULTILINE)
 854     {
 855         GdkWindow *window = GTK_TEXT(m_text)->text_area;
 856         if (!window)
 857             return FALSE;
 858         m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
 859         gdk_window_set_background( window, m_backgroundColour.GetColor() );
 860         gdk_window_clear( window );
 861     }
 862
 863     return TRUE;
 864 }
 865
 866 void wxTextCtrl::ApplyWidgetStyle()
 867 {
 868     if (m_windowStyle & wxTE_MULTILINE)
 869     {
 870         // how ?
 871     }
 872     else
 873     {
 874         SetWidgetStyle();
 875         gtk_widget_set_style( m_text, m_widgetStyle );
 876     }
 877 }
 878
 879 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
 880 {
 881     Cut();
 882 }
 883
 884 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
 885 {
 886     Copy();
 887 }
 888
 889 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
 890 {
 891     Paste();
 892 }
 893
 894 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
 895 {
 896     Undo();
 897 }
 898
 899 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
 900 {
 901     Redo();
 902 }
 903
 904 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
 905 {
 906     event.Enable( CanCut() );
 907 }
 908
 909 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
 910 {
 911     event.Enable( CanCopy() );
 912 }
 913
 914 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
 915 {
 916     event.Enable( CanPaste() );
 917 }
 918
 919 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
 920 {
 921     event.Enable( CanUndo() );
 922 }
 923
 924 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
 925 {
 926     event.Enable( CanRedo() );
 927 }
 928
 929 void wxTextCtrl::OnInternalIdle()
 930 {
 931     wxCursor cursor = m_cursor;
 932     if (g_globalCursor.Ok()) cursor = g_globalCursor;
 933
 934     if (cursor.Ok() && m_currentGdkCursor != cursor)
 935     {
 936         m_currentGdkCursor = cursor;
 937
 938         GdkWindow *window = (GdkWindow*) NULL;
 939         if (HasFlag(wxTE_MULTILINE))
 940             window = GTK_TEXT(m_text)->text_area;
 941         else
 942             window = GTK_ENTRY(m_text)->text_area;
 943
 944         if (window)
 945             gdk_window_set_cursor( window, cursor.GetCursor() );
 946
 947         if (!g_globalCursor.Ok())
 948             cursor = *wxSTANDARD_CURSOR;
 949
 950         window = m_widget->window;
 951         if (window)
 952             gdk_window_set_cursor( window, cursor.GetCursor() );
 953     }
 954 }