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 #ifdef __GNUG__
  11 #pragma implementation "combobox.h"
  12 #endif
  13
  14 #include "wx/combobox.h"
  15
  16 #if wxUSE_COMBOBOX
  17
  18 #include "wx/settings.h"
  19 #include "wx/intl.h"
  20
  21 #include "wx/textctrl.h"    // for wxEVT_COMMAND_TEXT_UPDATED
  22
  23 #include "wx/gtk/private.h"
  24
  25 //-----------------------------------------------------------------------------
  26 // idle system
  27 //-----------------------------------------------------------------------------
  28
  29 extern void wxapp_install_idle_handler();
  30 extern bool g_isIdle;
  31
  32 //-----------------------------------------------------------------------------
  33 // data
  34 //-----------------------------------------------------------------------------
  35
  36 extern bool   g_blockEventsOnDrag;
  37
  38 //-----------------------------------------------------------------------------
  39 // "select"
  40 //-----------------------------------------------------------------------------
  41
  42 static void
  43 gtk_combo_clicked_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  44 {
  45     if (g_isIdle) wxapp_install_idle_handler();
  46
  47     if (!combo->m_hasVMT) return;
  48
  49     if (g_blockEventsOnDrag) return;
  50
  51     if (combo->m_alreadySent)
  52     {
  53         combo->m_alreadySent = FALSE;
  54         return;
  55     }
  56
  57     combo->m_alreadySent = TRUE;
  58
  59     int curSelection = combo->GetSelection();
  60
  61     if (combo->m_prevSelection != curSelection)
  62     {
  63         GtkWidget *list = GTK_COMBO(combo->m_widget)->list;
  64         gtk_list_unselect_item( GTK_LIST(list), combo->m_prevSelection );
  65     }
  66
  67     combo->m_prevSelection = curSelection;
  68
  69     wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
  70     event.SetInt( curSelection );
  71     event.SetString( combo->GetStringSelection() );
  72     event.SetEventObject( combo );
  73
  74     combo->GetEventHandler()->ProcessEvent( event );
  75 }
  76
  77 //-----------------------------------------------------------------------------
  78 //  "changed"
  79 //-----------------------------------------------------------------------------
  80
  81 static void
  82 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  83 {
  84     if (g_isIdle) wxapp_install_idle_handler();
  85
  86     if (!combo->m_hasVMT) return;
  87
  88     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  89     event.SetString( combo->GetValue() );
  90     event.SetEventObject( combo );
  91     combo->GetEventHandler()->ProcessEvent( event );
  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
 125     // make it more useable
 126     gtk_combo_set_use_arrows_always( GTK_COMBO(m_widget), TRUE );
 127
 128     // and case-sensitive
 129     gtk_combo_set_case_sensitive( GTK_COMBO(m_widget), TRUE );
 130
 131
 132     GtkWidget *list = GTK_COMBO(m_widget)->list;
 133
 134     gtk_list_set_selection_mode( GTK_LIST(list), GTK_SELECTION_MULTIPLE );
 135
 136     for (int i = 0; i < n; i++)
 137     {
 138         /* don't send first event, which GTK sends aways when
 139            inserting the first item */
 140         m_alreadySent = TRUE;
 141
 142         GtkWidget *list_item = gtk_list_item_new_with_label( choices[i].mbc_str() );
 143
 144         m_clientDataList.Append( (wxObject*)NULL );
 145         m_clientObjectList.Append( (wxObject*)NULL );
 146
 147         gtk_container_add( GTK_CONTAINER(list), list_item );
 148
 149         gtk_signal_connect( GTK_OBJECT(list_item), "select",
 150            GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
 151
 152         gtk_widget_show( list_item );
 153     }
 154
 155     m_parent->DoAddChild( this );
 156
 157     m_focusWidget = GTK_COMBO(m_widget)->entry;
 158
 159     PostCreation();
 160
 161     ConnectWidget( GTK_COMBO(m_widget)->button );
 162
 163     if (!value.IsNull()) SetValue( value );
 164
 165     if (style & wxCB_READONLY)
 166         gtk_entry_set_editable( GTK_ENTRY( GTK_COMBO(m_widget)->entry ), FALSE );
 167
 168     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
 169       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 170
 171     wxSize size_best( DoGetBestSize() );
 172     wxSize new_size( size );
 173     if (new_size.x == -1)
 174         new_size.x = size_best.x;
 175     if (new_size.y == -1)
 176         new_size.y = size_best.y;
 177     if (new_size.y > size_best.y)
 178         new_size.y = size_best.y;
 179     if ((new_size.x != size.x) || (new_size.y != size.y))
 180     {
 181         SetSize( new_size.x, new_size.y );
 182
 183         // This is required for tool bar support
 184         gtk_widget_set_usize( m_widget, new_size.x, new_size.y );
 185     }
 186
 187
 188     SetBackgroundColour( wxSystemSettings::GetColour( wxSYS_COLOUR_WINDOW ) );
 189     SetForegroundColour( parent->GetForegroundColour() );
 190
 191     Show( TRUE );
 192
 193     return TRUE;
 194 }
 195
 196 wxComboBox::~wxComboBox()
 197 {
 198     wxNode *node = m_clientObjectList.First();
 199     while (node)
 200     {
 201         wxClientData *cd = (wxClientData*)node->Data();
 202         if (cd) delete cd;
 203         node = node->Next();
 204     }
 205     m_clientObjectList.Clear();
 206
 207     m_clientDataList.Clear();
 208 }
 209
 210 void wxComboBox::AppendCommon( const wxString &item )
 211 {
 212     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 213
 214     GtkWidget *list = GTK_COMBO(m_widget)->list;
 215
 216     GtkWidget *list_item = gtk_list_item_new_with_label( item.mbc_str() );
 217
 218     gtk_container_add( GTK_CONTAINER(list), list_item );
 219
 220     gtk_signal_connect( GTK_OBJECT(list_item), "select",
 221       GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
 222
 223     if (GTK_WIDGET_REALIZED(m_widget))
 224     {
 225         gtk_widget_realize( list_item );
 226         gtk_widget_realize( GTK_BIN(list_item)->child );
 227
 228         if (m_widgetStyle) ApplyWidgetStyle();
 229     }
 230
 231     gtk_widget_show( list_item );
 232 }
 233
 234 void wxComboBox::Append( const wxString &item )
 235 {
 236     m_clientDataList.Append( (wxObject*) NULL );
 237     m_clientObjectList.Append( (wxObject*) NULL );
 238
 239     AppendCommon( item );
 240 }
 241
 242 void wxComboBox::Append( const wxString &item, void *clientData )
 243 {
 244     m_clientDataList.Append( (wxObject*) clientData );
 245     m_clientObjectList.Append( (wxObject*)NULL );
 246
 247     AppendCommon( item );
 248 }
 249
 250 void wxComboBox::Append( const wxString &item, wxClientData *clientData )
 251 {
 252     m_clientDataList.Append( (wxObject*) NULL );
 253     m_clientObjectList.Append( (wxObject*) clientData );
 254
 255     AppendCommon( item );
 256 }
 257
 258 void wxComboBox::SetClientData( int n, void* clientData )
 259 {
 260     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 261
 262     wxNode *node = m_clientDataList.Nth( n );
 263     if (!node) return;
 264
 265     node->SetData( (wxObject*) clientData );
 266 }
 267
 268 void* wxComboBox::GetClientData( int n )
 269 {
 270     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 271
 272     wxNode *node = m_clientDataList.Nth( n );
 273     if (!node) return NULL;
 274
 275     return node->Data();
 276 }
 277
 278 void wxComboBox::SetClientObject( int n, wxClientData* clientData )
 279 {
 280     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 281
 282     wxNode *node = m_clientObjectList.Nth( n );
 283     if (!node) return;
 284
 285     wxClientData *cd = (wxClientData*) node->Data();
 286     if (cd) delete cd;
 287
 288     node->SetData( (wxObject*) clientData );
 289 }
 290
 291 wxClientData* wxComboBox::GetClientObject( int n )
 292 {
 293     wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, wxT("invalid combobox") );
 294
 295     wxNode *node = m_clientObjectList.Nth( n );
 296     if (!node) return (wxClientData*) NULL;
 297
 298     return (wxClientData*) node->Data();
 299 }
 300
 301 void wxComboBox::Clear()
 302 {
 303     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 304
 305     GtkWidget *list = GTK_COMBO(m_widget)->list;
 306     gtk_list_clear_items( GTK_LIST(list), 0, Number() );
 307
 308     wxNode *node = m_clientObjectList.First();
 309     while (node)
 310     {
 311         wxClientData *cd = (wxClientData*)node->Data();
 312         if (cd) delete cd;
 313         node = node->Next();
 314     }
 315     m_clientObjectList.Clear();
 316
 317     m_clientDataList.Clear();
 318 }
 319
 320 void wxComboBox::Delete( int n )
 321 {
 322     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 323
 324     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 325
 326     GList *child = g_list_nth( listbox->children, n );
 327
 328     if (!child)
 329     {
 330         wxFAIL_MSG(wxT("wrong index"));
 331         return;
 332     }
 333
 334     GList *list = g_list_append( (GList*) NULL, child->data );
 335     gtk_list_remove_items( listbox, list );
 336     g_list_free( list );
 337
 338     wxNode *node = m_clientObjectList.Nth( n );
 339     if (node)
 340     {
 341         wxClientData *cd = (wxClientData*)node->Data();
 342         if (cd) delete cd;
 343         m_clientObjectList.DeleteNode( node );
 344     }
 345
 346     node = m_clientDataList.Nth( n );
 347     if (node)
 348     {
 349         m_clientDataList.DeleteNode( node );
 350     }
 351 }
 352
 353 int wxComboBox::FindString( const wxString &item )
 354 {
 355     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 356
 357     GtkWidget *list = GTK_COMBO(m_widget)->list;
 358
 359     GList *child = GTK_LIST(list)->children;
 360     int count = 0;
 361     while (child)
 362     {
 363         GtkBin *bin = GTK_BIN( child->data );
 364         GtkLabel *label = GTK_LABEL( bin->child );
 365         if (item == wxString(label->label,*wxConvCurrent))
 366             return count;
 367         count++;
 368         child = child->next;
 369     }
 370
 371     return wxNOT_FOUND;
 372 }
 373
 374 int wxComboBox::GetSelection() const
 375 {
 376     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 377
 378     GtkWidget *list = GTK_COMBO(m_widget)->list;
 379
 380     GList *selection = GTK_LIST(list)->selection;
 381     if (selection)
 382     {
 383         GList *child = GTK_LIST(list)->children;
 384         int count = 0;
 385         while (child)
 386         {
 387             if (child->data == selection->data) return count;
 388             count++;
 389             child = child->next;
 390         }
 391     }
 392
 393     return -1;
 394 }
 395
 396 wxString wxComboBox::GetString( int n ) const
 397 {
 398     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 399
 400     GtkWidget *list = GTK_COMBO(m_widget)->list;
 401
 402     wxString str;
 403     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 404     if (child)
 405     {
 406         GtkBin *bin = GTK_BIN( child->data );
 407         GtkLabel *label = GTK_LABEL( bin->child );
 408         str = wxString(label->label,*wxConvCurrent);
 409     }
 410     else
 411     {
 412         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 413     }
 414
 415     return str;
 416 }
 417
 418 wxString wxComboBox::GetStringSelection() const
 419 {
 420     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 421
 422     GtkWidget *list = GTK_COMBO(m_widget)->list;
 423
 424     GList *selection = GTK_LIST(list)->selection;
 425     if (selection)
 426     {
 427         GtkBin *bin = GTK_BIN( selection->data );
 428         wxString tmp = wxString(GTK_LABEL( bin->child )->label,*wxConvCurrent);
 429         return tmp;
 430     }
 431
 432     wxFAIL_MSG( wxT("wxComboBox: no selection") );
 433
 434     return wxT("");
 435 }
 436
 437 int wxComboBox::Number() const
 438 {
 439     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 440
 441     GtkWidget *list = GTK_COMBO(m_widget)->list;
 442
 443     GList *child = GTK_LIST(list)->children;
 444     int count = 0;
 445     while (child) { count++; child = child->next; }
 446     return count;
 447 }
 448
 449 void wxComboBox::SetSelection( int n )
 450 {
 451     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 452
 453     DisableEvents();
 454
 455     GtkWidget *list = GTK_COMBO(m_widget)->list;
 456     gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 457     gtk_list_select_item( GTK_LIST(list), n );
 458     m_prevSelection = n;
 459
 460     EnableEvents();
 461 }
 462
 463 void wxComboBox::SetStringSelection( const wxString &string )
 464 {
 465     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 466
 467     int res = FindString( string );
 468     if (res == -1) return;
 469     SetSelection( res );
 470 }
 471
 472 wxString wxComboBox::GetValue() const
 473 {
 474     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 475     wxString tmp = wxString(gtk_entry_get_text( GTK_ENTRY(entry) ),*wxConvCurrent);
 476     return tmp;
 477 }
 478
 479 void wxComboBox::SetValue( const wxString& value )
 480 {
 481     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 482
 483     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 484     wxString tmp = wxT("");
 485     if (!value.IsNull()) tmp = value;
 486     gtk_entry_set_text( GTK_ENTRY(entry), tmp.mbc_str() );
 487 }
 488
 489 void wxComboBox::Copy()
 490 {
 491     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 492
 493     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 494     gtk_editable_copy_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 495 }
 496
 497 void wxComboBox::Cut()
 498 {
 499     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 500
 501     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 502     gtk_editable_cut_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 503 }
 504
 505 void wxComboBox::Paste()
 506 {
 507     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 508
 509     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 510     gtk_editable_paste_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG);
 511 }
 512
 513 void wxComboBox::SetInsertionPoint( long pos )
 514 {
 515     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 516
 517     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 518     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
 519 }
 520
 521 void wxComboBox::SetInsertionPointEnd()
 522 {
 523     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 524
 525     SetInsertionPoint( -1 );
 526 }
 527
 528 long wxComboBox::GetInsertionPoint() const
 529 {
 530     return (long) GET_EDITABLE_POS( GTK_COMBO(m_widget)->entry );
 531 }
 532
 533 long wxComboBox::GetLastPosition() const
 534 {
 535     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 536     int pos = GTK_ENTRY(entry)->text_length;
 537     return (long) pos-1;
 538 }
 539
 540 void wxComboBox::Replace( long from, long to, const wxString& value )
 541 {
 542     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 543     // FIXME: not quite sure how to do this method right in multibyte mode
 544
 545     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 546     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 547     if (value.IsNull()) return;
 548     gint pos = (gint)to;
 549     gtk_editable_insert_text( GTK_EDITABLE(entry), value.mbc_str(), value.Length(), &pos );
 550 }
 551
 552 void wxComboBox::Remove(long from, long to)
 553 {
 554     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 555
 556     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 557     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 558 }
 559
 560 void wxComboBox::SetSelection( long from, long to )
 561 {
 562     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 563     gtk_editable_select_region( GTK_EDITABLE(entry), (gint)from, (gint)to );
 564 }
 565
 566 void wxComboBox::SetEditable( bool editable )
 567 {
 568     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 569     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 570 }
 571
 572 void wxComboBox::OnChar( wxKeyEvent &event )
 573 {
 574     if ( event.KeyCode() == WXK_RETURN )
 575     {
 576         wxString value = GetValue();
 577
 578         if ( Number() == 0 )
 579         {
 580             // make Enter generate "selected" event if there is only one item
 581             // in the combobox - without it, it's impossible to select it at
 582             // all!
 583             wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, GetId() );
 584             event.SetInt( 0 );
 585             event.SetString( value );
 586             event.SetEventObject( this );
 587             GetEventHandler()->ProcessEvent( event );
 588         }
 589         else
 590         {
 591             // add the item to the list if it's not there yet
 592             if ( FindString(value) == wxNOT_FOUND )
 593             {
 594                 Append(value);
 595                 SetStringSelection(value);
 596
 597                 // and generate the selected event for it
 598                 wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, GetId() );
 599                 event.SetInt( Number() - 1 );
 600                 event.SetString( value );
 601                 event.SetEventObject( this );
 602                 GetEventHandler()->ProcessEvent( event );
 603             }
 604
 605             // This will invoke the dialog default action, such
 606             // as the clicking the default button.
 607
 608             wxWindow *top_frame = m_parent;
 609             while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 610             top_frame = top_frame->GetParent();
 611
 612             if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 613             {
 614                 GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 615
 616                 if (window->default_widget)
 617                 {
 618                     gtk_widget_activate (window->default_widget);
 619                     return;
 620                 }
 621             }
 622
 623             return;
 624         }
 625     }
 626
 627     event.Skip();
 628 }
 629
 630 void wxComboBox::DisableEvents()
 631 {
 632     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 633     GList *child = list->children;
 634     while (child)
 635     {
 636         gtk_signal_disconnect_by_func( GTK_OBJECT(child->data),
 637           GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
 638
 639         child = child->next;
 640     }
 641 }
 642
 643 void wxComboBox::EnableEvents()
 644 {
 645     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 646     GList *child = list->children;
 647     while (child)
 648     {
 649         gtk_signal_connect( GTK_OBJECT(child->data), "select",
 650           GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
 651
 652         child = child->next;
 653     }
 654 }
 655
 656 void wxComboBox::OnSize( wxSizeEvent &event )
 657 {
 658     event.Skip();
 659
 660 #if 0
 661     int w = 21;
 662     gtk_widget_set_usize( GTK_COMBO(m_widget)->entry, m_width-w-1, m_height );
 663
 664     gtk_widget_set_uposition( GTK_COMBO(m_widget)->button, m_x+m_width-w, m_y );
 665     gtk_widget_set_usize( GTK_COMBO(m_widget)->button, w, m_height );
 666 #endif // 0
 667 }
 668
 669 void wxComboBox::ApplyWidgetStyle()
 670 {
 671     SetWidgetStyle();
 672
 673 //    gtk_widget_set_style( GTK_COMBO(m_widget)->button, m_widgetStyle );
 674     gtk_widget_set_style( GTK_COMBO(m_widget)->entry, m_widgetStyle );
 675     gtk_widget_set_style( GTK_COMBO(m_widget)->list, m_widgetStyle );
 676
 677     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 678     GList *child = list->children;
 679     while (child)
 680     {
 681         gtk_widget_set_style( GTK_WIDGET(child->data), m_widgetStyle );
 682
 683         GtkBin *bin = GTK_BIN(child->data);
 684         gtk_widget_set_style( bin->child, m_widgetStyle );
 685
 686         child = child->next;
 687     }
 688 }
 689
 690 GtkWidget* wxComboBox::GetConnectWidget()
 691 {
 692     return GTK_COMBO(m_widget)->entry;
 693 }
 694
 695 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 696 {
 697     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 698              (window == GTK_COMBO(m_widget)->button->window ) );
 699 }
 700
 701 wxSize wxComboBox::DoGetBestSize() const
 702 {
 703     wxSize ret( wxControl::DoGetBestSize() );
 704
 705     // we know better our horizontal extent: it depends on the longest string
 706     // in the combobox
 707     ret.x = 0;
 708     if ( m_widget )
 709     {
 710         GdkFont *font = m_font.GetInternalFont();
 711
 712         wxCoord width;
 713         size_t count = Number();
 714         for ( size_t n = 0; n < count; n++ )
 715         {
 716             width = (wxCoord)gdk_string_width(font, GetString(n).mbc_str());
 717             if ( width > ret.x )
 718                 ret.x = width;
 719         }
 720     }
 721
 722     // empty combobox should have some reasonable default size too
 723     if ( ret.x < 100 )
 724         ret.x = 100;
 725     return ret;
 726 }
 727
 728 #endif