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