src/gtk1/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/intl.h"
  23
  24 #include "wx/textctrl.h"    // for wxEVT_COMMAND_TEXT_UPDATED
  25
  26 #include "wx/gtk/private.h"
  27
  28 //-----------------------------------------------------------------------------
  29 // idle system
  30 //-----------------------------------------------------------------------------
  31
  32 extern void wxapp_install_idle_handler();
  33 extern bool g_isIdle;
  34
  35 //-----------------------------------------------------------------------------
  36 // data
  37 //-----------------------------------------------------------------------------
  38
  39 extern bool   g_blockEventsOnDrag;
  40
  41 //-----------------------------------------------------------------------------
  42 // "select-child" - click/cursor get select-child, changed, select-child
  43 //-----------------------------------------------------------------------------
  44
  45 static void
  46 gtk_combo_select_child_callback( GtkList *WXUNUSED(list), GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  47 {
  48     if (g_isIdle) wxapp_install_idle_handler();
  49
  50     if (!combo->m_hasVMT) return;
  51
  52     if (g_blockEventsOnDrag) return;
  53
  54     int curSelection = combo->GetSelection();
  55
  56     if (combo->m_prevSelection != curSelection)
  57     {
  58         GtkWidget *list = GTK_COMBO(combo->m_widget)->list;
  59         gtk_list_unselect_item( GTK_LIST(list), combo->m_prevSelection );
  60     }
  61     combo->m_prevSelection = curSelection;
  62
  63     wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
  64     event.SetInt( curSelection );
  65     event.SetString( combo->GetStringSelection() );
  66     event.SetEventObject( combo );
  67
  68     combo->GetEventHandler()->ProcessEvent( event );
  69 }
  70
  71 //-----------------------------------------------------------------------------
  72 //  "changed" - typing and list item matches get changed, select-child
  73 //              if it doesn't match an item then just get a single changed
  74 //-----------------------------------------------------------------------------
  75
  76 static void
  77 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  78 {
  79     if (g_isIdle) wxapp_install_idle_handler();
  80
  81     if (!combo->m_hasVMT) return;
  82
  83     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  84     event.SetString( combo->GetValue() );
  85     event.SetEventObject( combo );
  86     combo->GetEventHandler()->ProcessEvent( event );
  87 }
  88
  89 static void
  90 gtk_dummy_callback(GtkEntry *WXUNUSED(entry), GtkCombo *WXUNUSED(combo))
  91 {
  92 }
  93
  94 //-----------------------------------------------------------------------------
  95 // wxComboBox
  96 //-----------------------------------------------------------------------------
  97
  98 IMPLEMENT_DYNAMIC_CLASS(wxComboBox,wxControl)
  99
 100 BEGIN_EVENT_TABLE(wxComboBox, wxControl)
 101     EVT_SIZE(wxComboBox::OnSize)
 102     EVT_CHAR(wxComboBox::OnChar)
 103 END_EVENT_TABLE()
 104
 105 bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
 106                          const wxPoint& pos, const wxSize& size,
 107                          int n, const wxString choices[],
 108                          long style, const wxValidator& validator,
 109                          const wxString& name )
 110 {
 111     m_alreadySent = FALSE;
 112     m_needParent = TRUE;
 113     m_acceptsFocus = TRUE;
 114     m_prevSelection = 0;
 115
 116     if (!PreCreation( parent, pos, size ) ||
 117         !CreateBase( parent, id, pos, size, style, validator, name ))
 118     {
 119         wxFAIL_MSG( wxT("wxComboBox creation failed") );
 120         return FALSE;
 121     }
 122
 123     m_widget = gtk_combo_new();
 124     GtkCombo *combo = GTK_COMBO(m_widget);
 125
 126     // Disable GTK's broken events ...
 127     gtk_signal_disconnect( GTK_OBJECT(combo->entry), combo->entry_change_id );
 128     // ... and add surogate handler.
 129     combo->entry_change_id = gtk_signal_connect (GTK_OBJECT (combo->entry), "changed",
 130                               (GtkSignalFunc) gtk_dummy_callback, combo);
 131
 132     // make it more useable
 133     gtk_combo_set_use_arrows_always( GTK_COMBO(m_widget), TRUE );
 134
 135     // and case-sensitive
 136     gtk_combo_set_case_sensitive( GTK_COMBO(m_widget), TRUE );
 137
 138     GtkWidget *list = GTK_COMBO(m_widget)->list;
 139
 140 #ifndef __WXGTK20__
 141     // gtk_list_set_selection_mode( GTK_LIST(list), GTK_SELECTION_MULTIPLE );
 142 #endif
 143
 144     for (int i = 0; i < n; i++)
 145     {
 146         GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( choices[i] ) );
 147
 148         m_clientDataList.Append( (wxObject*)NULL );
 149         m_clientObjectList.Append( (wxObject*)NULL );
 150
 151         gtk_container_add( GTK_CONTAINER(list), list_item );
 152
 153         gtk_widget_show( list_item );
 154     }
 155
 156     m_parent->DoAddChild( this );
 157
 158     m_focusWidget = combo->entry;
 159
 160     PostCreation();
 161
 162     ConnectWidget( combo->button );
 163
 164     // MSW's combo box shows the value and the selection is -1
 165     gtk_entry_set_text( GTK_ENTRY(combo->entry), wxGTK_CONV(value) );
 166     gtk_list_unselect_all( GTK_LIST(combo->list) );
 167
 168     if (style & wxCB_READONLY)
 169         gtk_entry_set_editable( GTK_ENTRY( combo->entry ), FALSE );
 170
 171     gtk_signal_connect( GTK_OBJECT(combo->entry), "changed",
 172       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 173
 174     gtk_signal_connect( GTK_OBJECT(combo->list), "select-child",
 175       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 176
 177     wxSize size_best( DoGetBestSize() );
 178     wxSize new_size( size );
 179     if (new_size.x == -1)
 180         new_size.x = size_best.x;
 181     if (new_size.y == -1)
 182         new_size.y = size_best.y;
 183     if (new_size.y > size_best.y)
 184         new_size.y = size_best.y;
 185     if ((new_size.x != size.x) || (new_size.y != size.y))
 186     {
 187         SetSize( new_size.x, new_size.y );
 188
 189         // This is required for tool bar support
 190         gtk_widget_set_usize( m_widget, new_size.x, new_size.y );
 191     }
 192
 193     SetBackgroundColour( wxSystemSettings::GetColour( wxSYS_COLOUR_WINDOW ) );
 194     SetForegroundColour( parent->GetForegroundColour() );
 195
 196     Show( TRUE );
 197
 198     return TRUE;
 199 }
 200
 201 wxComboBox::~wxComboBox()
 202 {
 203     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 204     while (node)
 205     {
 206         wxClientData *cd = (wxClientData*)node->GetData();
 207         if (cd) delete cd;
 208         node = node->GetNext();
 209     }
 210     m_clientObjectList.Clear();
 211
 212     m_clientDataList.Clear();
 213 }
 214
 215 void wxComboBox::SetFocus()
 216 {
 217     if ( m_hasFocus )
 218     {
 219         // don't do anything if we already have focus
 220         return;
 221     }
 222
 223     gtk_widget_grab_focus( m_focusWidget );
 224 }
 225
 226 int wxComboBox::DoAppend( const wxString &item )
 227 {
 228     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 229
 230     DisableEvents();
 231
 232     GtkWidget *list = GTK_COMBO(m_widget)->list;
 233
 234     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 235
 236     gtk_container_add( GTK_CONTAINER(list), list_item );
 237
 238     if (GTK_WIDGET_REALIZED(m_widget))
 239     {
 240         gtk_widget_realize( list_item );
 241         gtk_widget_realize( GTK_BIN(list_item)->child );
 242
 243         if (m_widgetStyle) ApplyWidgetStyle();
 244     }
 245
 246     gtk_widget_show( list_item );
 247
 248     const int count = GetCount();
 249
 250     if ( (int)m_clientDataList.GetCount() < count )
 251     m_clientDataList.Append( (wxObject*) NULL );
 252     if ( (int)m_clientObjectList.GetCount() < count )
 253     m_clientObjectList.Append( (wxObject*) NULL );
 254
 255     EnableEvents();
 256
 257     return count - 1;
 258 }
 259
 260 int wxComboBox::DoInsert( const wxString &item, int pos )
 261 {
 262     wxCHECK_MSG( !(GetWindowStyle() & wxCB_SORT), -1,
 263                     wxT("can't insert into sorted list"));
 264
 265     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 266
 267     int count = GetCount();
 268     wxCHECK_MSG( (pos >= 0) && (pos <= count), -1, wxT("invalid index") );
 269
 270     if (pos == count)
 271         return Append(item);
 272
 273     DisableEvents();
 274
 275     GtkWidget *list = GTK_COMBO(m_widget)->list;
 276
 277     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 278
 279     GList *gitem_list = g_list_alloc ();
 280     gitem_list->data = list_item;
 281     gtk_list_insert_items( GTK_LIST (list), gitem_list, pos );
 282
 283     if (GTK_WIDGET_REALIZED(m_widget))
 284     {
 285         gtk_widget_realize( list_item );
 286         gtk_widget_realize( GTK_BIN(list_item)->child );
 287
 288         if (m_widgetStyle)
 289             ApplyWidgetStyle();
 290     }
 291
 292     gtk_widget_show( list_item );
 293
 294     count = GetCount();
 295
 296     if ( (int)m_clientDataList.GetCount() < count )
 297     m_clientDataList.Insert( pos, (wxObject*) NULL );
 298     if ( (int)m_clientObjectList.GetCount() < count )
 299     m_clientObjectList.Insert( pos, (wxObject*) NULL );
 300
 301     EnableEvents();
 302
 303     return pos;
 304 }
 305
 306 void wxComboBox::DoSetItemClientData( int n, void* clientData )
 307 {
 308     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 309
 310     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 311     if (!node) return;
 312
 313     node->SetData( (wxObject*) clientData );
 314 }
 315
 316 void* wxComboBox::DoGetItemClientData( int n ) const
 317 {
 318     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 319
 320     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 321
 322     return node ? node->GetData() : NULL;
 323 }
 324
 325 void wxComboBox::DoSetItemClientObject( int n, wxClientData* clientData )
 326 {
 327     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 328
 329     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 330     if (!node) return;
 331
 332     wxClientData *cd = (wxClientData*) node->GetData();
 333     if (cd) delete cd;
 334
 335     node->SetData( (wxObject*) clientData );
 336 }
 337
 338 wxClientData* wxComboBox::DoGetItemClientObject( int n ) const
 339 {
 340     wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, wxT("invalid combobox") );
 341
 342     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 343
 344     return node ? (wxClientData*) node->GetData() : NULL;
 345 }
 346
 347 void wxComboBox::Clear()
 348 {
 349     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 350
 351     DisableEvents();
 352
 353     GtkWidget *list = GTK_COMBO(m_widget)->list;
 354     gtk_list_clear_items( GTK_LIST(list), 0, GetCount() );
 355
 356     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 357     while (node)
 358     {
 359         wxClientData *cd = (wxClientData*)node->GetData();
 360         if (cd) delete cd;
 361         node = node->GetNext();
 362     }
 363     m_clientObjectList.Clear();
 364
 365     m_clientDataList.Clear();
 366
 367     EnableEvents();
 368 }
 369
 370 void wxComboBox::Delete( int n )
 371 {
 372     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 373
 374     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 375
 376     GList *child = g_list_nth( listbox->children, n );
 377
 378     if (!child)
 379     {
 380         wxFAIL_MSG(wxT("wrong index"));
 381         return;
 382     }
 383
 384     DisableEvents();
 385
 386     GList *list = g_list_append( (GList*) NULL, child->data );
 387     gtk_list_remove_items( listbox, list );
 388     g_list_free( list );
 389
 390     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 391     if (node)
 392     {
 393         wxClientData *cd = (wxClientData*)node->GetData();
 394         if (cd) delete cd;
 395         m_clientObjectList.Erase( node );
 396     }
 397
 398     node = m_clientDataList.Item( n );
 399     if (node)
 400         m_clientDataList.Erase( node );
 401
 402     EnableEvents();
 403 }
 404
 405 void wxComboBox::SetString(int n, const wxString &text)
 406 {
 407     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 408
 409     GtkWidget *list = GTK_COMBO(m_widget)->list;
 410
 411     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 412     if (child)
 413     {
 414         GtkBin *bin = GTK_BIN( child->data );
 415         GtkLabel *label = GTK_LABEL( bin->child );
 416         gtk_label_set_text(label, wxGTK_CONV(text));
 417     }
 418     else
 419     {
 420         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 421     }
 422 }
 423
 424 int wxComboBox::FindString( const wxString &item ) const
 425 {
 426     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 427
 428     GtkWidget *list = GTK_COMBO(m_widget)->list;
 429
 430     GList *child = GTK_LIST(list)->children;
 431     int count = 0;
 432     while (child)
 433     {
 434         GtkBin *bin = GTK_BIN( child->data );
 435         GtkLabel *label = GTK_LABEL( bin->child );
 436 #ifdef __WXGTK20__
 437         wxString str( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 438 #else
 439         wxString str( label->label );
 440 #endif
 441         if (item == str)
 442             return count;
 443
 444         count++;
 445         child = child->next;
 446     }
 447
 448     return wxNOT_FOUND;
 449 }
 450
 451 int wxComboBox::GetSelection() const
 452 {
 453     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 454
 455     GtkWidget *list = GTK_COMBO(m_widget)->list;
 456
 457     GList *selection = GTK_LIST(list)->selection;
 458     if (selection)
 459     {
 460         GList *child = GTK_LIST(list)->children;
 461         int count = 0;
 462         while (child)
 463         {
 464             if (child->data == selection->data) return count;
 465             count++;
 466             child = child->next;
 467         }
 468     }
 469
 470     return -1;
 471 }
 472
 473 wxString wxComboBox::GetString( int n ) const
 474 {
 475     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 476
 477     GtkWidget *list = GTK_COMBO(m_widget)->list;
 478
 479     wxString str;
 480     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 481     if (child)
 482     {
 483         GtkBin *bin = GTK_BIN( child->data );
 484         GtkLabel *label = GTK_LABEL( bin->child );
 485 #ifdef __WXGTK20__
 486         str = wxGTK_CONV_BACK( gtk_label_get_text(label) );
 487 #else
 488         str = wxString( label->label );
 489 #endif
 490     }
 491     else
 492     {
 493         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 494     }
 495
 496     return str;
 497 }
 498
 499 wxString wxComboBox::GetStringSelection() const
 500 {
 501     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 502
 503     GtkWidget *list = GTK_COMBO(m_widget)->list;
 504
 505     GList *selection = GTK_LIST(list)->selection;
 506     if (selection)
 507     {
 508         GtkBin *bin = GTK_BIN( selection->data );
 509         GtkLabel *label = GTK_LABEL( bin->child );
 510 #ifdef __WXGTK20__
 511         wxString tmp( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 512 #else
 513         wxString tmp( label->label );
 514 #endif
 515         return tmp;
 516     }
 517
 518     wxFAIL_MSG( wxT("wxComboBox: no selection") );
 519
 520     return wxT("");
 521 }
 522
 523 int wxComboBox::GetCount() const
 524 {
 525     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 526
 527     GtkWidget *list = GTK_COMBO(m_widget)->list;
 528
 529     GList *child = GTK_LIST(list)->children;
 530     int count = 0;
 531     while (child) { count++; child = child->next; }
 532     return count;
 533 }
 534
 535 void wxComboBox::SetSelection( int n )
 536 {
 537     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 538
 539     DisableEvents();
 540
 541     GtkWidget *list = GTK_COMBO(m_widget)->list;
 542     gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 543     gtk_list_select_item( GTK_LIST(list), n );
 544     m_prevSelection = n;
 545
 546     EnableEvents();
 547 }
 548
 549 void wxComboBox::SetStringSelection( const wxString &string )
 550 {
 551     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 552
 553     int res = FindString( string );
 554     if (res == -1) return;
 555     SetSelection( res );
 556 }
 557
 558 wxString wxComboBox::GetValue() const
 559 {
 560     GtkEntry *entry = GTK_ENTRY( GTK_COMBO(m_widget)->entry );
 561     wxString tmp( wxGTK_CONV_BACK( gtk_entry_get_text( entry ) ) );
 562
 563 #if 0
 564     for (int i = 0; i < wxStrlen(tmp.c_str()) +1; i++)
 565     {
 566         wxChar c = tmp[i];
 567         printf( "%d ", (int) (c) );
 568     }
 569     printf( "\n" );
 570 #endif
 571
 572     return tmp;
 573 }
 574
 575 void wxComboBox::SetValue( const wxString& value )
 576 {
 577     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 578
 579     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 580     wxString tmp = wxT("");
 581     if (!value.IsNull()) tmp = value;
 582     gtk_entry_set_text( GTK_ENTRY(entry), wxGTK_CONV( tmp ) );
 583 }
 584
 585 void wxComboBox::Copy()
 586 {
 587     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 588
 589     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 590     gtk_editable_copy_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 591 }
 592
 593 void wxComboBox::Cut()
 594 {
 595     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 596
 597     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 598     gtk_editable_cut_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 599 }
 600
 601 void wxComboBox::Paste()
 602 {
 603     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 604
 605     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 606     gtk_editable_paste_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG);
 607 }
 608
 609 void wxComboBox::SetInsertionPoint( long pos )
 610 {
 611     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 612
 613     if ( pos == GetLastPosition() )
 614         pos = -1;
 615
 616     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 617     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
 618 }
 619
 620 long wxComboBox::GetInsertionPoint() const
 621 {
 622     return (long) GET_EDITABLE_POS( GTK_COMBO(m_widget)->entry );
 623 }
 624
 625 long wxComboBox::GetLastPosition() const
 626 {
 627     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 628     int pos = GTK_ENTRY(entry)->text_length;
 629     return (long) pos-1;
 630 }
 631
 632 void wxComboBox::Replace( long from, long to, const wxString& value )
 633 {
 634     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 635
 636     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 637     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 638     if (value.IsNull()) return;
 639     gint pos = (gint)to;
 640
 641 #if wxUSE_UNICODE
 642     wxCharBuffer buffer = wxConvUTF8.cWX2MB( value );
 643     gtk_editable_insert_text( GTK_EDITABLE(entry), (const char*) buffer, strlen( (const char*) buffer ), &pos );
 644 #else
 645     gtk_editable_insert_text( GTK_EDITABLE(entry), value.c_str(), value.Length(), &pos );
 646 #endif
 647 }
 648
 649 void wxComboBox::SetSelection( long from, long to )
 650 {
 651     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 652     gtk_editable_select_region( GTK_EDITABLE(entry), (gint)from, (gint)to );
 653 }
 654
 655 void wxComboBox::SetEditable( bool editable )
 656 {
 657     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 658     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 659 }
 660
 661 void wxComboBox::OnChar( wxKeyEvent &event )
 662 {
 663     if ( event.GetKeyCode() == WXK_RETURN )
 664     {
 665         // GTK automatically selects an item if its in the list
 666         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, GetId());
 667         event.SetString( GetValue() );
 668         event.SetInt( GetSelection() );
 669         event.SetEventObject( this );
 670
 671         if (!GetEventHandler()->ProcessEvent( event ))
 672         {
 673             // This will invoke the dialog default action, such
 674             // as the clicking the default button.
 675
 676             wxWindow *top_frame = m_parent;
 677             while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 678                 top_frame = top_frame->GetParent();
 679
 680             if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 681             {
 682                 GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 683
 684                 if (window->default_widget)
 685                     gtk_widget_activate (window->default_widget);
 686             }
 687         }
 688
 689         // Catch GTK event so that GTK doesn't open the drop
 690         // down list upon RETURN.
 691         return;
 692     }
 693
 694     event.Skip();
 695 }
 696
 697 void wxComboBox::DisableEvents()
 698 {
 699     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->list),
 700       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 701     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->entry),
 702       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 703 }
 704
 705 void wxComboBox::EnableEvents()
 706 {
 707     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(m_widget)->list), "select-child",
 708       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 709     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
 710       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 711 }
 712
 713 void wxComboBox::OnSize( wxSizeEvent &event )
 714 {
 715     event.Skip();
 716
 717 #if 0
 718     int w = 21;
 719     gtk_widget_set_usize( GTK_COMBO(m_widget)->entry, m_width-w-1, m_height );
 720
 721     gtk_widget_set_uposition( GTK_COMBO(m_widget)->button, m_x+m_width-w, m_y );
 722     gtk_widget_set_usize( GTK_COMBO(m_widget)->button, w, m_height );
 723 #endif // 0
 724 }
 725
 726 void wxComboBox::ApplyWidgetStyle()
 727 {
 728     SetWidgetStyle();
 729
 730 //    gtk_widget_set_style( GTK_COMBO(m_widget)->button, m_widgetStyle );
 731     gtk_widget_set_style( GTK_COMBO(m_widget)->entry, m_widgetStyle );
 732     gtk_widget_set_style( GTK_COMBO(m_widget)->list, m_widgetStyle );
 733
 734     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 735     GList *child = list->children;
 736     while (child)
 737     {
 738         gtk_widget_set_style( GTK_WIDGET(child->data), m_widgetStyle );
 739
 740         GtkBin *bin = GTK_BIN(child->data);
 741         gtk_widget_set_style( bin->child, m_widgetStyle );
 742
 743         child = child->next;
 744     }
 745 }
 746
 747 GtkWidget* wxComboBox::GetConnectWidget()
 748 {
 749     return GTK_COMBO(m_widget)->entry;
 750 }
 751
 752 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 753 {
 754     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 755              (window == GTK_COMBO(m_widget)->button->window ) );
 756 }
 757
 758 wxSize wxComboBox::DoGetBestSize() const
 759 {
 760     wxSize ret( wxControl::DoGetBestSize() );
 761
 762     // we know better our horizontal extent: it depends on the longest string
 763     // in the combobox
 764     ret.x = 0;
 765     if ( m_widget )
 766     {
 767         int width;
 768         size_t count = GetCount();
 769         for ( size_t n = 0; n < count; n++ )
 770         {
 771             GetTextExtent( GetString(n), &width, NULL, NULL, NULL, &m_font );
 772             if ( width > ret.x )
 773                 ret.x = width;
 774         }
 775     }
 776
 777     // empty combobox should have some reasonable default size too
 778     if ( ret.x < 100 )
 779         ret.x = 100;
 780     return ret;
 781 }
 782
 783 #endif