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 <gdk/gdk.h>
  24 #include <gtk/gtk.h>
  25
  26 //-----------------------------------------------------------------------------
  27 // idle system
  28 //-----------------------------------------------------------------------------
  29
  30 extern void wxapp_install_idle_handler();
  31 extern bool g_isIdle;
  32
  33 //-----------------------------------------------------------------------------
  34 // data
  35 //-----------------------------------------------------------------------------
  36
  37 extern bool   g_blockEventsOnDrag;
  38
  39 //-----------------------------------------------------------------------------
  40 // "select"
  41 //-----------------------------------------------------------------------------
  42
  43 static void
  44 gtk_combo_clicked_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  45 {
  46     if (g_isIdle) wxapp_install_idle_handler();
  47
  48     if (!combo->m_hasVMT) return;
  49
  50     if (g_blockEventsOnDrag) return;
  51
  52     if (combo->m_alreadySent)
  53     {
  54         combo->m_alreadySent = FALSE;
  55         return;
  56     }
  57
  58     combo->m_alreadySent = TRUE;
  59
  60     int curSelection = combo->GetSelection();
  61
  62     if (combo->m_prevSelection != curSelection)
  63     {
  64         GtkWidget *list = GTK_COMBO(combo->m_widget)->list;
  65         gtk_list_unselect_item( GTK_LIST(list), combo->m_prevSelection );
  66     }
  67
  68     combo->m_prevSelection = curSelection;
  69
  70     wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
  71     event.SetInt( curSelection );
  72     event.SetString( combo->GetStringSelection() );
  73     event.SetEventObject( combo );
  74
  75     combo->GetEventHandler()->ProcessEvent( event );
  76 }
  77
  78 //-----------------------------------------------------------------------------
  79 //  "changed"
  80 //-----------------------------------------------------------------------------
  81
  82 static void
  83 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  84 {
  85     if (g_isIdle) wxapp_install_idle_handler();
  86
  87     if (!combo->m_hasVMT) return;
  88
  89     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  90     event.SetString( combo->GetValue() );
  91     event.SetEventObject( combo );
  92     combo->GetEventHandler()->ProcessEvent( event );
  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, const wxString& value,
 107                          const wxPoint& pos, const wxSize& size,
 108                          int n, const wxString choices[],
 109                          long style, const wxValidator& validator,
 110                          const wxString& name )
 111 {
 112     m_alreadySent = FALSE;
 113     m_needParent = TRUE;
 114     m_acceptsFocus = TRUE;
 115     m_prevSelection = 0;
 116
 117     if (!PreCreation( parent, pos, size ) ||
 118         !CreateBase( parent, id, pos, size, style, validator, name ))
 119     {
 120         wxFAIL_MSG( wxT("wxComboBox creation failed") );
 121         return FALSE;
 122     }
 123
 124     m_widget = gtk_combo_new();
 125
 126     // make it more useable
 127     gtk_combo_set_use_arrows_always( GTK_COMBO(m_widget), TRUE );
 128
 129     // and case-sensitive
 130     gtk_combo_set_case_sensitive( GTK_COMBO(m_widget), TRUE );
 131
 132
 133     GtkWidget *list = GTK_COMBO(m_widget)->list;
 134
 135     gtk_list_set_selection_mode( GTK_LIST(list), GTK_SELECTION_MULTIPLE );
 136
 137     for (int i = 0; i < n; i++)
 138     {
 139         /* don't send first event, which GTK sends aways when
 140            inserting the first item */
 141         m_alreadySent = TRUE;
 142
 143         GtkWidget *list_item = gtk_list_item_new_with_label( choices[i].mbc_str() );
 144
 145         m_clientDataList.Append( (wxObject*)NULL );
 146         m_clientObjectList.Append( (wxObject*)NULL );
 147
 148         gtk_container_add( GTK_CONTAINER(list), list_item );
 149
 150         gtk_signal_connect( GTK_OBJECT(list_item), "select",
 151            GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
 152
 153         gtk_widget_show( list_item );
 154     }
 155
 156     m_parent->DoAddChild( this );
 157
 158     m_focusWidget = GTK_COMBO(m_widget)->entry;
 159
 160     PostCreation();
 161
 162     ConnectWidget( GTK_COMBO(m_widget)->button );
 163
 164     if (!value.IsNull()) SetValue( value );
 165
 166     if (style & wxCB_READONLY)
 167         gtk_entry_set_editable( GTK_ENTRY( GTK_COMBO(m_widget)->entry ), FALSE );
 168
 169     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
 170       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 171
 172     wxSize size_best( DoGetBestSize() );
 173     wxSize new_size( size );
 174     if (new_size.x == -1)
 175         new_size.x = size_best.x;
 176     if (new_size.y == -1)
 177         new_size.y = size_best.y;
 178     if (new_size.y > size_best.y)
 179         new_size.y = size_best.y;
 180     if ((new_size.x != size.x) || (new_size.y != size.y))
 181     {
 182         SetSize( new_size.x, new_size.y );
 183
 184         // This is required for tool bar support
 185         gtk_widget_set_usize( m_widget, new_size.x, new_size.y );
 186     }
 187
 188
 189     SetBackgroundColour( wxSystemSettings::GetColour( wxSYS_COLOUR_WINDOW ) );
 190     SetForegroundColour( parent->GetForegroundColour() );
 191
 192     Show( TRUE );
 193
 194     return TRUE;
 195 }
 196
 197 wxComboBox::~wxComboBox()
 198 {
 199     wxNode *node = m_clientObjectList.First();
 200     while (node)
 201     {
 202         wxClientData *cd = (wxClientData*)node->Data();
 203         if (cd) delete cd;
 204         node = node->Next();
 205     }
 206     m_clientObjectList.Clear();
 207
 208     m_clientDataList.Clear();
 209 }
 210
 211 void wxComboBox::AppendCommon( const wxString &item )
 212 {
 213     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 214
 215     GtkWidget *list = GTK_COMBO(m_widget)->list;
 216
 217     GtkWidget *list_item = gtk_list_item_new_with_label( item.mbc_str() );
 218
 219     gtk_container_add( GTK_CONTAINER(list), list_item );
 220
 221     gtk_signal_connect( GTK_OBJECT(list_item), "select",
 222       GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
 223
 224     if (GTK_WIDGET_REALIZED(m_widget))
 225     {
 226         gtk_widget_realize( list_item );
 227         gtk_widget_realize( GTK_BIN(list_item)->child );
 228
 229         if (m_widgetStyle) ApplyWidgetStyle();
 230     }
 231
 232     gtk_widget_show( list_item );
 233 }
 234
 235 void wxComboBox::Append( const wxString &item )
 236 {
 237     m_clientDataList.Append( (wxObject*) NULL );
 238     m_clientObjectList.Append( (wxObject*) NULL );
 239
 240     AppendCommon( item );
 241 }
 242
 243 void wxComboBox::Append( const wxString &item, void *clientData )
 244 {
 245     m_clientDataList.Append( (wxObject*) clientData );
 246     m_clientObjectList.Append( (wxObject*)NULL );
 247
 248     AppendCommon( item );
 249 }
 250
 251 void wxComboBox::Append( const wxString &item, wxClientData *clientData )
 252 {
 253     m_clientDataList.Append( (wxObject*) NULL );
 254     m_clientObjectList.Append( (wxObject*) clientData );
 255
 256     AppendCommon( item );
 257 }
 258
 259 void wxComboBox::SetClientData( int n, void* clientData )
 260 {
 261     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 262
 263     wxNode *node = m_clientDataList.Nth( n );
 264     if (!node) return;
 265
 266     node->SetData( (wxObject*) clientData );
 267 }
 268
 269 void* wxComboBox::GetClientData( int n )
 270 {
 271     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 272
 273     wxNode *node = m_clientDataList.Nth( n );
 274     if (!node) return NULL;
 275
 276     return node->Data();
 277 }
 278
 279 void wxComboBox::SetClientObject( int n, wxClientData* clientData )
 280 {
 281     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 282
 283     wxNode *node = m_clientObjectList.Nth( n );
 284     if (!node) return;
 285
 286     wxClientData *cd = (wxClientData*) node->Data();
 287     if (cd) delete cd;
 288
 289     node->SetData( (wxObject*) clientData );
 290 }
 291
 292 wxClientData* wxComboBox::GetClientObject( int n )
 293 {
 294     wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, wxT("invalid combobox") );
 295
 296     wxNode *node = m_clientObjectList.Nth( n );
 297     if (!node) return (wxClientData*) NULL;
 298
 299     return (wxClientData*) node->Data();
 300 }
 301
 302 void wxComboBox::Clear()
 303 {
 304     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 305
 306     GtkWidget *list = GTK_COMBO(m_widget)->list;
 307     gtk_list_clear_items( GTK_LIST(list), 0, Number() );
 308
 309     wxNode *node = m_clientObjectList.First();
 310     while (node)
 311     {
 312         wxClientData *cd = (wxClientData*)node->Data();
 313         if (cd) delete cd;
 314         node = node->Next();
 315     }
 316     m_clientObjectList.Clear();
 317
 318     m_clientDataList.Clear();
 319 }
 320
 321 void wxComboBox::Delete( int n )
 322 {
 323     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 324
 325     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 326
 327     GList *child = g_list_nth( listbox->children, n );
 328
 329     if (!child)
 330     {
 331         wxFAIL_MSG(wxT("wrong index"));
 332         return;
 333     }
 334
 335     GList *list = g_list_append( (GList*) NULL, child->data );
 336     gtk_list_remove_items( listbox, list );
 337     g_list_free( list );
 338
 339     wxNode *node = m_clientObjectList.Nth( n );
 340     if (node)
 341     {
 342         wxClientData *cd = (wxClientData*)node->Data();
 343         if (cd) delete cd;
 344         m_clientObjectList.DeleteNode( node );
 345     }
 346
 347     node = m_clientDataList.Nth( n );
 348     if (node)
 349     {
 350         m_clientDataList.DeleteNode( node );
 351     }
 352 }
 353
 354 int wxComboBox::FindString( const wxString &item )
 355 {
 356     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 357
 358     GtkWidget *list = GTK_COMBO(m_widget)->list;
 359
 360     GList *child = GTK_LIST(list)->children;
 361     int count = 0;
 362     while (child)
 363     {
 364         GtkBin *bin = GTK_BIN( child->data );
 365         GtkLabel *label = GTK_LABEL( bin->child );
 366         if (item == wxString(label->label,*wxConvCurrent))
 367             return count;
 368         count++;
 369         child = child->next;
 370     }
 371
 372     return wxNOT_FOUND;
 373 }
 374
 375 int wxComboBox::GetSelection() const
 376 {
 377     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 378
 379     GtkWidget *list = GTK_COMBO(m_widget)->list;
 380
 381     GList *selection = GTK_LIST(list)->selection;
 382     if (selection)
 383     {
 384         GList *child = GTK_LIST(list)->children;
 385         int count = 0;
 386         while (child)
 387         {
 388             if (child->data == selection->data) return count;
 389             count++;
 390             child = child->next;
 391         }
 392     }
 393
 394     return -1;
 395 }
 396
 397 wxString wxComboBox::GetString( int n ) const
 398 {
 399     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 400
 401     GtkWidget *list = GTK_COMBO(m_widget)->list;
 402
 403     wxString str;
 404     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 405     if (child)
 406     {
 407         GtkBin *bin = GTK_BIN( child->data );
 408         GtkLabel *label = GTK_LABEL( bin->child );
 409         str = wxString(label->label,*wxConvCurrent);
 410     }
 411     else
 412     {
 413         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 414     }
 415
 416     return str;
 417 }
 418
 419 wxString wxComboBox::GetStringSelection() const
 420 {
 421     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 422
 423     GtkWidget *list = GTK_COMBO(m_widget)->list;
 424
 425     GList *selection = GTK_LIST(list)->selection;
 426     if (selection)
 427     {
 428         GtkBin *bin = GTK_BIN( selection->data );
 429         wxString tmp = wxString(GTK_LABEL( bin->child )->label,*wxConvCurrent);
 430         return tmp;
 431     }
 432
 433     wxFAIL_MSG( wxT("wxComboBox: no selection") );
 434
 435     return wxT("");
 436 }
 437
 438 int wxComboBox::Number() const
 439 {
 440     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 441
 442     GtkWidget *list = GTK_COMBO(m_widget)->list;
 443
 444     GList *child = GTK_LIST(list)->children;
 445     int count = 0;
 446     while (child) { count++; child = child->next; }
 447     return count;
 448 }
 449
 450 void wxComboBox::SetSelection( int n )
 451 {
 452     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 453
 454     DisableEvents();
 455
 456     GtkWidget *list = GTK_COMBO(m_widget)->list;
 457     gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 458     gtk_list_select_item( GTK_LIST(list), n );
 459     m_prevSelection = n;
 460
 461     EnableEvents();
 462 }
 463
 464 void wxComboBox::SetStringSelection( const wxString &string )
 465 {
 466     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 467
 468     int res = FindString( string );
 469     if (res == -1) return;
 470     SetSelection( res );
 471 }
 472
 473 wxString wxComboBox::GetValue() const
 474 {
 475     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 476     wxString tmp = wxString(gtk_entry_get_text( GTK_ENTRY(entry) ),*wxConvCurrent);
 477     return tmp;
 478 }
 479
 480 void wxComboBox::SetValue( const wxString& value )
 481 {
 482     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 483
 484     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 485     wxString tmp = wxT("");
 486     if (!value.IsNull()) tmp = value;
 487     gtk_entry_set_text( GTK_ENTRY(entry), tmp.mbc_str() );
 488 }
 489
 490 void wxComboBox::Copy()
 491 {
 492     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 493
 494     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 495 #if defined(__WXGTK13__) || (GTK_MINOR_VERSION > 0)
 496     gtk_editable_copy_clipboard( GTK_EDITABLE(entry) );
 497 #else
 498     gtk_editable_copy_clipboard( GTK_EDITABLE(entry), 0 );
 499 #endif
 500 }
 501
 502 void wxComboBox::Cut()
 503 {
 504     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 505
 506     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 507 #if defined(__WXGTK13__) || (GTK_MINOR_VERSION > 0)
 508     gtk_editable_cut_clipboard( GTK_EDITABLE(entry) );
 509 #else
 510     gtk_editable_cut_clipboard( GTK_EDITABLE(entry), 0 );
 511 #endif
 512 }
 513
 514 void wxComboBox::Paste()
 515 {
 516     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 517
 518     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 519 #if defined(__WXGTK13__) || (GTK_MINOR_VERSION > 0)
 520     gtk_editable_paste_clipboard( GTK_EDITABLE(entry) );
 521 #else
 522     gtk_editable_paste_clipboard( GTK_EDITABLE(entry), 0 );
 523 #endif
 524 }
 525
 526 void wxComboBox::SetInsertionPoint( long pos )
 527 {
 528     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 529
 530     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 531     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
 532 }
 533
 534 void wxComboBox::SetInsertionPointEnd()
 535 {
 536     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 537
 538     SetInsertionPoint( -1 );
 539 }
 540
 541 long wxComboBox::GetInsertionPoint() const
 542 {
 543     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 544     return (long) GTK_EDITABLE(entry)->current_pos;
 545 }
 546
 547 long wxComboBox::GetLastPosition() const
 548 {
 549     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 550     int pos = GTK_ENTRY(entry)->text_length;
 551     return (long) pos-1;
 552 }
 553
 554 void wxComboBox::Replace( long from, long to, const wxString& value )
 555 {
 556     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 557     // FIXME: not quite sure how to do this method right in multibyte mode
 558
 559     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 560     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 561     if (value.IsNull()) return;
 562     gint pos = (gint)to;
 563     gtk_editable_insert_text( GTK_EDITABLE(entry), value.mbc_str(), value.Length(), &pos );
 564 }
 565
 566 void wxComboBox::Remove(long from, long to)
 567 {
 568     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 569
 570     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 571     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 572 }
 573
 574 void wxComboBox::SetSelection( long from, long to )
 575 {
 576     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 577     gtk_editable_select_region( GTK_EDITABLE(entry), (gint)from, (gint)to );
 578 }
 579
 580 void wxComboBox::SetEditable( bool editable )
 581 {
 582     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 583     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 584 }
 585
 586 void wxComboBox::OnChar( wxKeyEvent &event )
 587 {
 588     if ( event.KeyCode() == WXK_RETURN )
 589     {
 590         wxString value = GetValue();
 591
 592         if ( Number() == 0 )
 593         {
 594             // make Enter generate "selected" event if there is only one item
 595             // in the combobox - without it, it's impossible to select it at
 596             // all!
 597             wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, GetId() );
 598             event.SetInt( 0 );
 599             event.SetString( value );
 600             event.SetEventObject( this );
 601             GetEventHandler()->ProcessEvent( event );
 602         }
 603         else
 604         {
 605             // add the item to the list if it's not there yet
 606             if ( FindString(value) == wxNOT_FOUND )
 607             {
 608                 Append(value);
 609                 SetStringSelection(value);
 610
 611                 // and generate the selected event for it
 612                 wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, GetId() );
 613                 event.SetInt( Number() - 1 );
 614                 event.SetString( value );
 615                 event.SetEventObject( this );
 616                 GetEventHandler()->ProcessEvent( event );
 617             }
 618             //else: do nothing, this will open the listbox
 619         }
 620     }
 621
 622     event.Skip();
 623 }
 624
 625 void wxComboBox::DisableEvents()
 626 {
 627     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 628     GList *child = list->children;
 629     while (child)
 630     {
 631         gtk_signal_disconnect_by_func( GTK_OBJECT(child->data),
 632           GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
 633
 634         child = child->next;
 635     }
 636 }
 637
 638 void wxComboBox::EnableEvents()
 639 {
 640     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 641     GList *child = list->children;
 642     while (child)
 643     {
 644         gtk_signal_connect( GTK_OBJECT(child->data), "select",
 645           GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
 646
 647         child = child->next;
 648     }
 649 }
 650
 651 void wxComboBox::OnSize( wxSizeEvent &event )
 652 {
 653     event.Skip();
 654
 655 #if 0
 656     int w = 21;
 657     gtk_widget_set_usize( GTK_COMBO(m_widget)->entry, m_width-w-1, m_height );
 658
 659     gtk_widget_set_uposition( GTK_COMBO(m_widget)->button, m_x+m_width-w, m_y );
 660     gtk_widget_set_usize( GTK_COMBO(m_widget)->button, w, m_height );
 661 #endif // 0
 662 }
 663
 664 void wxComboBox::ApplyWidgetStyle()
 665 {
 666     SetWidgetStyle();
 667
 668 //    gtk_widget_set_style( GTK_COMBO(m_widget)->button, m_widgetStyle );
 669     gtk_widget_set_style( GTK_COMBO(m_widget)->entry, m_widgetStyle );
 670     gtk_widget_set_style( GTK_COMBO(m_widget)->list, m_widgetStyle );
 671
 672     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 673     GList *child = list->children;
 674     while (child)
 675     {
 676         gtk_widget_set_style( GTK_WIDGET(child->data), m_widgetStyle );
 677
 678         GtkBin *bin = GTK_BIN(child->data);
 679         gtk_widget_set_style( bin->child, m_widgetStyle );
 680
 681         child = child->next;
 682     }
 683 }
 684
 685 GtkWidget* wxComboBox::GetConnectWidget()
 686 {
 687     return GTK_COMBO(m_widget)->entry;
 688 }
 689
 690 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 691 {
 692     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 693              (window == GTK_COMBO(m_widget)->button->window ) );
 694 }
 695
 696 wxSize wxComboBox::DoGetBestSize() const
 697 {
 698     wxSize ret( wxControl::DoGetBestSize() );
 699
 700     // we know better our horizontal extent: it depends on the longest string
 701     // in the combobox
 702     ret.x = 0;
 703     if ( m_widget )
 704     {
 705         GdkFont *font = m_font.GetInternalFont();
 706
 707         wxCoord width;
 708         size_t count = Number();
 709         for ( size_t n = 0; n < count; n++ )
 710         {
 711             width = (wxCoord)gdk_string_width(font, GetString(n).mbc_str());
 712             if ( width > ret.x )
 713                 ret.x = width;
 714         }
 715     }
 716
 717     // empty combobox should have some reasonable default size too
 718     if ( ret.x < 100 )
 719         ret.x = 100;
 720     return ret;
 721 }
 722
 723 #endif