src/gtk/combobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        combobox.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  11 #pragma implementation "combobox.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #include "wx/combobox.h"
  18
  19 #if wxUSE_COMBOBOX
  20
  21 #include "wx/settings.h"
  22 #include "wx/arrstr.h"
  23 #include "wx/intl.h"
  24
  25 #include "wx/textctrl.h"    // for wxEVT_COMMAND_TEXT_UPDATED
  26
  27 #include "wx/gtk/private.h"
  28
  29 //-----------------------------------------------------------------------------
  30 // idle system
  31 //-----------------------------------------------------------------------------
  32
  33 extern void wxapp_install_idle_handler();
  34 extern bool g_isIdle;
  35
  36 //-----------------------------------------------------------------------------
  37 // data
  38 //-----------------------------------------------------------------------------
  39
  40 extern bool   g_blockEventsOnDrag;
  41
  42 //-----------------------------------------------------------------------------
  43 // "select-child" - click/cursor get select-child, changed, select-child
  44 //-----------------------------------------------------------------------------
  45
  46 static void
  47 gtk_combo_select_child_callback( GtkList *WXUNUSED(list), GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  48 {
  49     if (g_isIdle) wxapp_install_idle_handler();
  50
  51     if (!combo->m_hasVMT) return;
  52
  53     if (g_blockEventsOnDrag) return;
  54
  55     int curSelection = combo->GetSelection();
  56
  57     if (combo->m_prevSelection == curSelection) return;
  58
  59     GtkWidget *list = GTK_COMBO(combo->m_widget)->list;
  60     gtk_list_unselect_item( GTK_LIST(list), combo->m_prevSelection );
  61
  62     combo->m_prevSelection = curSelection;
  63
  64     wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
  65     event.SetInt( curSelection );
  66     event.SetString( combo->GetStringSelection() );
  67     event.SetEventObject( combo );
  68
  69     combo->GetEventHandler()->ProcessEvent( event );
  70 }
  71
  72 //-----------------------------------------------------------------------------
  73 //  "changed" - typing and list item matches get changed, select-child
  74 //              if it doesn't match an item then just get a single changed
  75 //-----------------------------------------------------------------------------
  76
  77 static void
  78 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  79 {
  80     if (g_isIdle) wxapp_install_idle_handler();
  81
  82     if (!combo->m_hasVMT) return;
  83
  84     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  85     event.SetString( combo->GetValue() );
  86     event.SetEventObject( combo );
  87     combo->GetEventHandler()->ProcessEvent( event );
  88 }
  89
  90 static void
  91 gtk_dummy_callback(GtkEntry *WXUNUSED(entry), GtkCombo *WXUNUSED(combo))
  92 {
  93 }
  94
  95 //-----------------------------------------------------------------------------
  96 // wxComboBox
  97 //-----------------------------------------------------------------------------
  98
  99 IMPLEMENT_DYNAMIC_CLASS(wxComboBox,wxControl)
 100
 101 BEGIN_EVENT_TABLE(wxComboBox, wxControl)
 102     EVT_SIZE(wxComboBox::OnSize)
 103     EVT_CHAR(wxComboBox::OnChar)
 104 END_EVENT_TABLE()
 105
 106 bool wxComboBox::Create( wxWindow *parent, wxWindowID id,
 107                          const wxString& value,
 108                          const wxPoint& pos, const wxSize& size,
 109                          const wxArrayString& choices,
 110                          long style, const wxValidator& validator,
 111                          const wxString& name )
 112 {
 113     wxCArrayString chs(choices);
 114
 115     return Create( parent, id, value, pos, size, chs.GetCount(),
 116                    chs.GetStrings(), style, validator, name );
 117 }
 118
 119 bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
 120                          const wxPoint& pos, const wxSize& size,
 121                          int n, const wxString choices[],
 122                          long style, const wxValidator& validator,
 123                          const wxString& name )
 124 {
 125     m_alreadySent = FALSE;
 126     m_needParent = TRUE;
 127     m_acceptsFocus = TRUE;
 128     m_prevSelection = 0;
 129
 130     if (!PreCreation( parent, pos, size ) ||
 131         !CreateBase( parent, id, pos, size, style, validator, name ))
 132     {
 133         wxFAIL_MSG( wxT("wxComboBox creation failed") );
 134         return FALSE;
 135     }
 136
 137     m_widget = gtk_combo_new();
 138     GtkCombo *combo = GTK_COMBO(m_widget);
 139
 140     // Disable GTK's broken events ...
 141     gtk_signal_disconnect( GTK_OBJECT(combo->entry), combo->entry_change_id );
 142     // ... and add surogate handler.
 143     combo->entry_change_id = gtk_signal_connect (GTK_OBJECT (combo->entry), "changed",
 144                               (GtkSignalFunc) gtk_dummy_callback, combo);
 145
 146     // make it more useable
 147     gtk_combo_set_use_arrows_always( GTK_COMBO(m_widget), TRUE );
 148
 149     // and case-sensitive
 150     gtk_combo_set_case_sensitive( GTK_COMBO(m_widget), TRUE );
 151
 152     GtkWidget *list = GTK_COMBO(m_widget)->list;
 153
 154 #ifndef __WXGTK20__
 155     // gtk_list_set_selection_mode( GTK_LIST(list), GTK_SELECTION_MULTIPLE );
 156 #endif
 157
 158     for (int i = 0; i < n; i++)
 159     {
 160         GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( choices[i] ) );
 161
 162         m_clientDataList.Append( (wxObject*)NULL );
 163         m_clientObjectList.Append( (wxObject*)NULL );
 164
 165         gtk_container_add( GTK_CONTAINER(list), list_item );
 166
 167         gtk_widget_show( list_item );
 168     }
 169
 170     m_parent->DoAddChild( this );
 171
 172     m_focusWidget = combo->entry;
 173
 174     PostCreation(size);
 175
 176     ConnectWidget( combo->button );
 177
 178     // MSW's combo box shows the value and the selection is -1
 179     gtk_entry_set_text( GTK_ENTRY(combo->entry), wxGTK_CONV(value) );
 180     gtk_list_unselect_all( GTK_LIST(combo->list) );
 181
 182     if (style & wxCB_READONLY)
 183         gtk_entry_set_editable( GTK_ENTRY( combo->entry ), FALSE );
 184
 185     gtk_signal_connect( GTK_OBJECT(combo->entry), "changed",
 186       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 187
 188     gtk_signal_connect( GTK_OBJECT(combo->list), "select-child",
 189       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 190
 191     SetBestSize(size); // need this too because this is a wxControlWithItems
 192
 193     // This is required for tool bar support
 194     wxSize setsize = GetSize();
 195     gtk_widget_set_usize( m_widget, setsize.x, setsize.y );
 196
 197     return TRUE;
 198 }
 199
 200 wxComboBox::~wxComboBox()
 201 {
 202     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 203     while (node)
 204     {
 205         wxClientData *cd = (wxClientData*)node->GetData();
 206         if (cd) delete cd;
 207         node = node->GetNext();
 208     }
 209     m_clientObjectList.Clear();
 210
 211     m_clientDataList.Clear();
 212 }
 213
 214 void wxComboBox::SetFocus()
 215 {
 216     if ( m_hasFocus )
 217     {
 218         // don't do anything if we already have focus
 219         return;
 220     }
 221
 222     gtk_widget_grab_focus( m_focusWidget );
 223 }
 224
 225 int wxComboBox::DoAppend( const wxString &item )
 226 {
 227     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 228
 229     DisableEvents();
 230
 231     GtkWidget *list = GTK_COMBO(m_widget)->list;
 232
 233     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 234
 235     gtk_container_add( GTK_CONTAINER(list), list_item );
 236
 237     if (GTK_WIDGET_REALIZED(m_widget))
 238     {
 239         gtk_widget_realize( list_item );
 240         gtk_widget_realize( GTK_BIN(list_item)->child );
 241     }
 242
 243     // Apply current widget style to the new list_item
 244     GtkRcStyle *style = CreateWidgetStyle();
 245     if (style)
 246     {
 247         gtk_widget_modify_style( GTK_WIDGET( list_item ), style );
 248         GtkBin *bin = GTK_BIN( list_item );
 249         GtkWidget *label = GTK_WIDGET( bin->child );
 250         gtk_widget_modify_style( label, style );
 251         gtk_rc_style_unref( style );
 252     }
 253
 254     gtk_widget_show( list_item );
 255
 256     const int count = GetCount();
 257
 258     if ( (int)m_clientDataList.GetCount() < count )
 259     m_clientDataList.Append( (wxObject*) NULL );
 260     if ( (int)m_clientObjectList.GetCount() < count )
 261     m_clientObjectList.Append( (wxObject*) NULL );
 262
 263     EnableEvents();
 264
 265     InvalidateBestSize();
 266
 267     return count - 1;
 268 }
 269
 270 int wxComboBox::DoInsert( const wxString &item, int pos )
 271 {
 272     wxCHECK_MSG( !(GetWindowStyle() & wxCB_SORT), -1,
 273                     wxT("can't insert into sorted list"));
 274
 275     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 276
 277     int count = GetCount();
 278     wxCHECK_MSG( (pos >= 0) && (pos <= count), -1, wxT("invalid index") );
 279
 280     if (pos == count)
 281         return Append(item);
 282
 283     DisableEvents();
 284
 285     GtkWidget *list = GTK_COMBO(m_widget)->list;
 286
 287     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 288
 289     GList *gitem_list = g_list_alloc ();
 290     gitem_list->data = list_item;
 291     gtk_list_insert_items( GTK_LIST (list), gitem_list, pos );
 292
 293     if (GTK_WIDGET_REALIZED(m_widget))
 294     {
 295         gtk_widget_realize( list_item );
 296         gtk_widget_realize( GTK_BIN(list_item)->child );
 297
 298         ApplyWidgetStyle();
 299     }
 300
 301     gtk_widget_show( list_item );
 302
 303     count = GetCount();
 304
 305     if ( (int)m_clientDataList.GetCount() < count )
 306     m_clientDataList.Insert( pos, (wxObject*) NULL );
 307     if ( (int)m_clientObjectList.GetCount() < count )
 308     m_clientObjectList.Insert( pos, (wxObject*) NULL );
 309
 310     EnableEvents();
 311
 312     InvalidateBestSize();
 313
 314     return pos;
 315 }
 316
 317 void wxComboBox::DoSetItemClientData( int n, void* clientData )
 318 {
 319     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 320
 321     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 322     if (!node) return;
 323
 324     node->SetData( (wxObject*) clientData );
 325 }
 326
 327 void* wxComboBox::DoGetItemClientData( int n ) const
 328 {
 329     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 330
 331     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 332
 333     return node ? node->GetData() : NULL;
 334 }
 335
 336 void wxComboBox::DoSetItemClientObject( int n, wxClientData* clientData )
 337 {
 338     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 339
 340     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 341     if (!node) return;
 342
 343     // wxItemContainer already deletes data for us
 344
 345     node->SetData( (wxObject*) clientData );
 346 }
 347
 348 wxClientData* wxComboBox::DoGetItemClientObject( int n ) const
 349 {
 350     wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, wxT("invalid combobox") );
 351
 352     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 353
 354     return node ? (wxClientData*) node->GetData() : NULL;
 355 }
 356
 357 void wxComboBox::Clear()
 358 {
 359     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 360
 361     DisableEvents();
 362
 363     GtkWidget *list = GTK_COMBO(m_widget)->list;
 364     gtk_list_clear_items( GTK_LIST(list), 0, GetCount() );
 365
 366     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 367     while (node)
 368     {
 369         wxClientData *cd = (wxClientData*)node->GetData();
 370         if (cd) delete cd;
 371         node = node->GetNext();
 372     }
 373     m_clientObjectList.Clear();
 374
 375     m_clientDataList.Clear();
 376
 377     EnableEvents();
 378
 379     InvalidateBestSize();
 380 }
 381
 382 void wxComboBox::Delete( int n )
 383 {
 384     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 385
 386     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 387
 388     GList *child = g_list_nth( listbox->children, n );
 389
 390     if (!child)
 391     {
 392         wxFAIL_MSG(wxT("wrong index"));
 393         return;
 394     }
 395
 396     DisableEvents();
 397
 398     GList *list = g_list_append( (GList*) NULL, child->data );
 399     gtk_list_remove_items( listbox, list );
 400     g_list_free( list );
 401
 402     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 403     if (node)
 404     {
 405         wxClientData *cd = (wxClientData*)node->GetData();
 406         if (cd) delete cd;
 407         m_clientObjectList.Erase( node );
 408     }
 409
 410     node = m_clientDataList.Item( n );
 411     if (node)
 412         m_clientDataList.Erase( node );
 413
 414     EnableEvents();
 415
 416     InvalidateBestSize();
 417 }
 418
 419 void wxComboBox::SetString(int n, const wxString &text)
 420 {
 421     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 422
 423     GtkWidget *list = GTK_COMBO(m_widget)->list;
 424
 425     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 426     if (child)
 427     {
 428         GtkBin *bin = GTK_BIN( child->data );
 429         GtkLabel *label = GTK_LABEL( bin->child );
 430         gtk_label_set_text(label, wxGTK_CONV(text));
 431     }
 432     else
 433     {
 434         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 435     }
 436
 437     InvalidateBestSize();
 438 }
 439
 440 int wxComboBox::FindString( const wxString &item ) const
 441 {
 442     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 443
 444     GtkWidget *list = GTK_COMBO(m_widget)->list;
 445
 446     GList *child = GTK_LIST(list)->children;
 447     int count = 0;
 448     while (child)
 449     {
 450         GtkBin *bin = GTK_BIN( child->data );
 451         GtkLabel *label = GTK_LABEL( bin->child );
 452 #ifdef __WXGTK20__
 453         wxString str( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 454 #else
 455         wxString str( label->label );
 456 #endif
 457         if (item == str)
 458             return count;
 459
 460         count++;
 461         child = child->next;
 462     }
 463
 464     return wxNOT_FOUND;
 465 }
 466
 467 int wxComboBox::GetSelection() const
 468 {
 469     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 470
 471     GtkWidget *list = GTK_COMBO(m_widget)->list;
 472
 473     GList *selection = GTK_LIST(list)->selection;
 474     if (selection)
 475     {
 476         GList *child = GTK_LIST(list)->children;
 477         int count = 0;
 478         while (child)
 479         {
 480             if (child->data == selection->data) return count;
 481             count++;
 482             child = child->next;
 483         }
 484     }
 485
 486     return -1;
 487 }
 488
 489 wxString wxComboBox::GetString( int n ) const
 490 {
 491     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 492
 493     GtkWidget *list = GTK_COMBO(m_widget)->list;
 494
 495     wxString str;
 496     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 497     if (child)
 498     {
 499         GtkBin *bin = GTK_BIN( child->data );
 500         GtkLabel *label = GTK_LABEL( bin->child );
 501 #ifdef __WXGTK20__
 502         str = wxGTK_CONV_BACK( gtk_label_get_text(label) );
 503 #else
 504         str = wxString( label->label );
 505 #endif
 506     }
 507     else
 508     {
 509         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 510     }
 511
 512     return str;
 513 }
 514
 515 wxString wxComboBox::GetStringSelection() const
 516 {
 517     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 518
 519     GtkWidget *list = GTK_COMBO(m_widget)->list;
 520
 521     GList *selection = GTK_LIST(list)->selection;
 522     if (selection)
 523     {
 524         GtkBin *bin = GTK_BIN( selection->data );
 525         GtkLabel *label = GTK_LABEL( bin->child );
 526 #ifdef __WXGTK20__
 527         wxString tmp( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 528 #else
 529         wxString tmp( label->label );
 530 #endif
 531         return tmp;
 532     }
 533
 534     wxFAIL_MSG( wxT("wxComboBox: no selection") );
 535
 536     return wxT("");
 537 }
 538
 539 int wxComboBox::GetCount() const
 540 {
 541     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 542
 543     GtkWidget *list = GTK_COMBO(m_widget)->list;
 544
 545     GList *child = GTK_LIST(list)->children;
 546     int count = 0;
 547     while (child) { count++; child = child->next; }
 548     return count;
 549 }
 550
 551 void wxComboBox::SetSelection( int n )
 552 {
 553     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 554
 555     DisableEvents();
 556
 557     GtkWidget *list = GTK_COMBO(m_widget)->list;
 558     gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 559     gtk_list_select_item( GTK_LIST(list), n );
 560     m_prevSelection = n;
 561
 562     EnableEvents();
 563 }
 564
 565 bool wxComboBox::SetStringSelection( const wxString &string )
 566 {
 567     wxCHECK_MSG( m_widget != NULL, false, wxT("invalid combobox") );
 568
 569     int res = FindString( string );
 570     if (res == -1) return false;
 571     SetSelection( res );
 572     return true;
 573 }
 574
 575 wxString wxComboBox::GetValue() const
 576 {
 577     GtkEntry *entry = GTK_ENTRY( GTK_COMBO(m_widget)->entry );
 578     wxString tmp( wxGTK_CONV_BACK( gtk_entry_get_text( entry ) ) );
 579
 580 #if 0
 581     for (int i = 0; i < wxStrlen(tmp.c_str()) +1; i++)
 582     {
 583         wxChar c = tmp[i];
 584         printf( "%d ", (int) (c) );
 585     }
 586     printf( "\n" );
 587 #endif
 588
 589     return tmp;
 590 }
 591
 592 void wxComboBox::SetValue( const wxString& value )
 593 {
 594     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 595
 596     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 597     wxString tmp = wxT("");
 598     if (!value.IsNull()) tmp = value;
 599     gtk_entry_set_text( GTK_ENTRY(entry), wxGTK_CONV( tmp ) );
 600
 601     InvalidateBestSize();
 602 }
 603
 604 void wxComboBox::Copy()
 605 {
 606     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 607
 608     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 609     gtk_editable_copy_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 610 }
 611
 612 void wxComboBox::Cut()
 613 {
 614     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 615
 616     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 617     gtk_editable_cut_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 618 }
 619
 620 void wxComboBox::Paste()
 621 {
 622     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 623
 624     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 625     gtk_editable_paste_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG);
 626 }
 627
 628 void wxComboBox::SetInsertionPoint( long pos )
 629 {
 630     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 631
 632     if ( pos == GetLastPosition() )
 633         pos = -1;
 634
 635     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 636     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
 637 }
 638
 639 long wxComboBox::GetInsertionPoint() const
 640 {
 641     return (long) GET_EDITABLE_POS( GTK_COMBO(m_widget)->entry );
 642 }
 643
 644 long wxComboBox::GetLastPosition() const
 645 {
 646     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 647     int pos = GTK_ENTRY(entry)->text_length;
 648     return (long) pos-1;
 649 }
 650
 651 void wxComboBox::Replace( long from, long to, const wxString& value )
 652 {
 653     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 654
 655     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 656     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 657     if (value.IsNull()) return;
 658     gint pos = (gint)to;
 659
 660 #if wxUSE_UNICODE
 661     wxCharBuffer buffer = wxConvUTF8.cWX2MB( value );
 662     gtk_editable_insert_text( GTK_EDITABLE(entry), (const char*) buffer, strlen( (const char*) buffer ), &pos );
 663 #else
 664     gtk_editable_insert_text( GTK_EDITABLE(entry), value.c_str(), value.Length(), &pos );
 665 #endif
 666 }
 667
 668 void wxComboBox::SetSelection( long from, long to )
 669 {
 670     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 671     gtk_editable_select_region( GTK_EDITABLE(entry), (gint)from, (gint)to );
 672 }
 673
 674 void wxComboBox::SetEditable( bool editable )
 675 {
 676     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 677     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 678 }
 679
 680 void wxComboBox::OnChar( wxKeyEvent &event )
 681 {
 682     if ( event.GetKeyCode() == WXK_RETURN )
 683     {
 684         // GTK automatically selects an item if its in the list
 685         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, GetId());
 686         event.SetString( GetValue() );
 687         event.SetInt( GetSelection() );
 688         event.SetEventObject( this );
 689
 690         if (!GetEventHandler()->ProcessEvent( event ))
 691         {
 692             // This will invoke the dialog default action, such
 693             // as the clicking the default button.
 694
 695             wxWindow *top_frame = m_parent;
 696             while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 697                 top_frame = top_frame->GetParent();
 698
 699             if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 700             {
 701                 GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 702
 703                 if (window->default_widget)
 704                     gtk_widget_activate (window->default_widget);
 705             }
 706         }
 707
 708         // Catch GTK event so that GTK doesn't open the drop
 709         // down list upon RETURN.
 710         return;
 711     }
 712
 713     event.Skip();
 714 }
 715
 716 void wxComboBox::DisableEvents()
 717 {
 718     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->list),
 719       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 720     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->entry),
 721       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 722 }
 723
 724 void wxComboBox::EnableEvents()
 725 {
 726     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(m_widget)->list), "select-child",
 727       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 728     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
 729       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 730 }
 731
 732 void wxComboBox::OnSize( wxSizeEvent &event )
 733 {
 734     // NB: In some situations (e.g. on non-first page of a wizard, if the
 735     //     size used is default size), GtkCombo widget is resized correctly,
 736     //     but it's look is not updated, it's rendered as if it was much wider.
 737     //     No other widgets are affected, so it looks like a bug in GTK+.
 738     //     Manually requesting resize calculation (as gtk_pizza_set_size does)
 739     //     fixes it.
 740     if (GTK_WIDGET_VISIBLE(m_widget))
 741         gtk_widget_queue_resize(m_widget);
 742
 743     event.Skip();
 744 }
 745
 746 void wxComboBox::DoApplyWidgetStyle(GtkRcStyle *style)
 747 {
 748 //    gtk_widget_modify_style( GTK_COMBO(m_widget)->button, syle );
 749
 750     gtk_widget_modify_style( GTK_COMBO(m_widget)->entry, style );
 751     gtk_widget_modify_style( GTK_COMBO(m_widget)->list, style );
 752
 753     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 754     GList *child = list->children;
 755     while (child)
 756     {
 757         gtk_widget_modify_style( GTK_WIDGET(child->data), style );
 758
 759         GtkBin *bin = GTK_BIN(child->data);
 760         gtk_widget_modify_style( bin->child, style );
 761
 762         child = child->next;
 763     }
 764 }
 765
 766 GtkWidget* wxComboBox::GetConnectWidget()
 767 {
 768     return GTK_COMBO(m_widget)->entry;
 769 }
 770
 771 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 772 {
 773     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 774              (window == GTK_COMBO(m_widget)->button->window ) );
 775 }
 776
 777 wxSize wxComboBox::DoGetBestSize() const
 778 {
 779     wxSize ret( wxControl::DoGetBestSize() );
 780
 781     // we know better our horizontal extent: it depends on the longest string
 782     // in the combobox
 783     if ( m_widget )
 784     {
 785         int width;
 786         size_t count = GetCount();
 787         for ( size_t n = 0; n < count; n++ )
 788         {
 789             GetTextExtent( GetString(n), &width, NULL, NULL, NULL );
 790             if ( width > ret.x )
 791                 ret.x = width;
 792         }
 793     }
 794
 795     // empty combobox should have some reasonable default size too
 796     if ( ret.x < 100 )
 797         ret.x = 100;
 798
 799     CacheBestSize(ret);
 800     return ret;
 801 }
 802
 803 // static
 804 wxVisualAttributes
 805 wxComboBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 806 {
 807     return GetDefaultAttributesFromGTKWidget(gtk_combo_new, true);
 808 }
 809
 810 #endif