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 #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         SetSize( new_size.x, new_size.y );
 182
 183     SetBackgroundColour( wxSystemSettings::GetSystemColour( wxSYS_COLOUR_WINDOW ) );
 184     SetForegroundColour( parent->GetForegroundColour() );
 185
 186     Show( TRUE );
 187
 188     return TRUE;
 189 }
 190
 191 wxComboBox::~wxComboBox()
 192 {
 193     wxNode *node = m_clientObjectList.First();
 194     while (node)
 195     {
 196         wxClientData *cd = (wxClientData*)node->Data();
 197         if (cd) delete cd;
 198         node = node->Next();
 199     }
 200     m_clientObjectList.Clear();
 201
 202     m_clientDataList.Clear();
 203 }
 204
 205 void wxComboBox::AppendCommon( const wxString &item )
 206 {
 207     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 208
 209     GtkWidget *list = GTK_COMBO(m_widget)->list;
 210
 211     GtkWidget *list_item = gtk_list_item_new_with_label( item.mbc_str() );
 212
 213     gtk_container_add( GTK_CONTAINER(list), list_item );
 214
 215     gtk_signal_connect( GTK_OBJECT(list_item), "select",
 216       GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
 217
 218     if (GTK_WIDGET_REALIZED(m_widget))
 219     {
 220         gtk_widget_realize( list_item );
 221         gtk_widget_realize( GTK_BIN(list_item)->child );
 222
 223         if (m_widgetStyle) ApplyWidgetStyle();
 224     }
 225
 226     gtk_widget_show( list_item );
 227 }
 228
 229 void wxComboBox::Append( const wxString &item )
 230 {
 231     m_clientDataList.Append( (wxObject*) NULL );
 232     m_clientObjectList.Append( (wxObject*) NULL );
 233
 234     AppendCommon( item );
 235 }
 236
 237 void wxComboBox::Append( const wxString &item, void *clientData )
 238 {
 239     m_clientDataList.Append( (wxObject*) clientData );
 240     m_clientObjectList.Append( (wxObject*)NULL );
 241
 242     AppendCommon( item );
 243 }
 244
 245 void wxComboBox::Append( const wxString &item, wxClientData *clientData )
 246 {
 247     m_clientDataList.Append( (wxObject*) NULL );
 248     m_clientObjectList.Append( (wxObject*) clientData );
 249
 250     AppendCommon( item );
 251 }
 252
 253 void wxComboBox::SetClientData( int n, void* clientData )
 254 {
 255     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 256
 257     wxNode *node = m_clientDataList.Nth( n );
 258     if (!node) return;
 259
 260     node->SetData( (wxObject*) clientData );
 261 }
 262
 263 void* wxComboBox::GetClientData( int n )
 264 {
 265     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 266
 267     wxNode *node = m_clientDataList.Nth( n );
 268     if (!node) return NULL;
 269
 270     return node->Data();
 271 }
 272
 273 void wxComboBox::SetClientObject( int n, wxClientData* clientData )
 274 {
 275     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 276
 277     wxNode *node = m_clientObjectList.Nth( n );
 278     if (!node) return;
 279
 280     wxClientData *cd = (wxClientData*) node->Data();
 281     if (cd) delete cd;
 282
 283     node->SetData( (wxObject*) clientData );
 284 }
 285
 286 wxClientData* wxComboBox::GetClientObject( int n )
 287 {
 288     wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, wxT("invalid combobox") );
 289
 290     wxNode *node = m_clientDataList.Nth( n );
 291     if (!node) return (wxClientData*) NULL;
 292
 293     return (wxClientData*) node->Data();
 294 }
 295
 296 void wxComboBox::Clear()
 297 {
 298     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 299
 300     GtkWidget *list = GTK_COMBO(m_widget)->list;
 301     gtk_list_clear_items( GTK_LIST(list), 0, Number() );
 302
 303     wxNode *node = m_clientObjectList.First();
 304     while (node)
 305     {
 306         wxClientData *cd = (wxClientData*)node->Data();
 307         if (cd) delete cd;
 308         node = node->Next();
 309     }
 310     m_clientObjectList.Clear();
 311
 312     m_clientDataList.Clear();
 313 }
 314
 315 void wxComboBox::Delete( int n )
 316 {
 317     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 318
 319     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 320
 321     GList *child = g_list_nth( listbox->children, n );
 322
 323     if (!child)
 324     {
 325         wxFAIL_MSG(wxT("wrong index"));
 326         return;
 327     }
 328
 329     GList *list = g_list_append( (GList*) NULL, child->data );
 330     gtk_list_remove_items( listbox, list );
 331     g_list_free( list );
 332
 333     wxNode *node = m_clientObjectList.Nth( n );
 334     if (node)
 335     {
 336         wxClientData *cd = (wxClientData*)node->Data();
 337         if (cd) delete cd;
 338         m_clientObjectList.DeleteNode( node );
 339     }
 340
 341     node = m_clientDataList.Nth( n );
 342     if (node)
 343     {
 344         m_clientDataList.DeleteNode( node );
 345     }
 346 }
 347
 348 int wxComboBox::FindString( const wxString &item )
 349 {
 350     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 351
 352     GtkWidget *list = GTK_COMBO(m_widget)->list;
 353
 354     GList *child = GTK_LIST(list)->children;
 355     int count = 0;
 356     while (child)
 357     {
 358         GtkBin *bin = GTK_BIN( child->data );
 359         GtkLabel *label = GTK_LABEL( bin->child );
 360         if (item == wxString(label->label,*wxConvCurrent))
 361             return count;
 362         count++;
 363         child = child->next;
 364     }
 365
 366     return wxNOT_FOUND;
 367 }
 368
 369 int wxComboBox::GetSelection() const
 370 {
 371     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 372
 373     GtkWidget *list = GTK_COMBO(m_widget)->list;
 374
 375     GList *selection = GTK_LIST(list)->selection;
 376     if (selection)
 377     {
 378         GList *child = GTK_LIST(list)->children;
 379         int count = 0;
 380         while (child)
 381         {
 382             if (child->data == selection->data) return count;
 383             count++;
 384             child = child->next;
 385         }
 386     }
 387
 388     return -1;
 389 }
 390
 391 wxString wxComboBox::GetString( int n ) const
 392 {
 393     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 394
 395     GtkWidget *list = GTK_COMBO(m_widget)->list;
 396
 397     wxString str;
 398     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 399     if (child)
 400     {
 401         GtkBin *bin = GTK_BIN( child->data );
 402         GtkLabel *label = GTK_LABEL( bin->child );
 403         str = wxString(label->label,*wxConvCurrent);
 404     }
 405     else
 406     {
 407         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 408     }
 409
 410     return str;
 411 }
 412
 413 wxString wxComboBox::GetStringSelection() const
 414 {
 415     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 416
 417     GtkWidget *list = GTK_COMBO(m_widget)->list;
 418
 419     GList *selection = GTK_LIST(list)->selection;
 420     if (selection)
 421     {
 422         GtkBin *bin = GTK_BIN( selection->data );
 423         wxString tmp = wxString(GTK_LABEL( bin->child )->label,*wxConvCurrent);
 424         return tmp;
 425     }
 426
 427     wxFAIL_MSG( wxT("wxComboBox: no selection") );
 428
 429     return wxT("");
 430 }
 431
 432 int wxComboBox::Number() const
 433 {
 434     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 435
 436     GtkWidget *list = GTK_COMBO(m_widget)->list;
 437
 438     GList *child = GTK_LIST(list)->children;
 439     int count = 0;
 440     while (child) { count++; child = child->next; }
 441     return count;
 442 }
 443
 444 void wxComboBox::SetSelection( int n )
 445 {
 446     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 447
 448     DisableEvents();
 449
 450     GtkWidget *list = GTK_COMBO(m_widget)->list;
 451     gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 452     gtk_list_select_item( GTK_LIST(list), n );
 453     m_prevSelection = n;
 454
 455     EnableEvents();
 456 }
 457
 458 void wxComboBox::SetStringSelection( const wxString &string )
 459 {
 460     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 461
 462     int res = FindString( string );
 463     if (res == -1) return;
 464     SetSelection( res );
 465 }
 466
 467 wxString wxComboBox::GetValue() const
 468 {
 469     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 470     wxString tmp = wxString(gtk_entry_get_text( GTK_ENTRY(entry) ),*wxConvCurrent);
 471     return tmp;
 472 }
 473
 474 void wxComboBox::SetValue( const wxString& value )
 475 {
 476     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 477
 478     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 479     wxString tmp = wxT("");
 480     if (!value.IsNull()) tmp = value;
 481     gtk_entry_set_text( GTK_ENTRY(entry), tmp.mbc_str() );
 482 }
 483
 484 void wxComboBox::Copy()
 485 {
 486     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 487
 488     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 489 #if defined(__WXGTK13__) || (GTK_MINOR_VERSION > 0)
 490     gtk_editable_copy_clipboard( GTK_EDITABLE(entry) );
 491 #else
 492     gtk_editable_copy_clipboard( GTK_EDITABLE(entry), 0 );
 493 #endif
 494 }
 495
 496 void wxComboBox::Cut()
 497 {
 498     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 499
 500     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 501 #if defined(__WXGTK13__) || (GTK_MINOR_VERSION > 0)
 502     gtk_editable_cut_clipboard( GTK_EDITABLE(entry) );
 503 #else
 504     gtk_editable_cut_clipboard( GTK_EDITABLE(entry), 0 );
 505 #endif
 506 }
 507
 508 void wxComboBox::Paste()
 509 {
 510     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 511
 512     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 513 #if defined(__WXGTK13__) || (GTK_MINOR_VERSION > 0)
 514     gtk_editable_paste_clipboard( GTK_EDITABLE(entry) );
 515 #else
 516     gtk_editable_paste_clipboard( GTK_EDITABLE(entry), 0 );
 517 #endif
 518 }
 519
 520 void wxComboBox::SetInsertionPoint( long pos )
 521 {
 522     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 523
 524     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 525     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
 526 }
 527
 528 void wxComboBox::SetInsertionPointEnd()
 529 {
 530     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 531
 532     SetInsertionPoint( -1 );
 533 }
 534
 535 long wxComboBox::GetInsertionPoint() const
 536 {
 537     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 538     return (long) GTK_EDITABLE(entry)->current_pos;
 539 }
 540
 541 long wxComboBox::GetLastPosition() const
 542 {
 543     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 544     int pos = GTK_ENTRY(entry)->text_length;
 545     return (long) pos-1;
 546 }
 547
 548 void wxComboBox::Replace( long from, long to, const wxString& value )
 549 {
 550     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 551     // FIXME: not quite sure how to do this method right in multibyte mode
 552
 553     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 554     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 555     if (value.IsNull()) return;
 556     gint pos = (gint)to;
 557     gtk_editable_insert_text( GTK_EDITABLE(entry), value.mbc_str(), value.Length(), &pos );
 558 }
 559
 560 void wxComboBox::Remove(long from, long to)
 561 {
 562     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 563
 564     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 565     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 566 }
 567
 568 void wxComboBox::SetSelection( long from, long to )
 569 {
 570     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 571     gtk_editable_select_region( GTK_EDITABLE(entry), (gint)from, (gint)to );
 572 }
 573
 574 void wxComboBox::SetEditable( bool editable )
 575 {
 576     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 577     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 578 }
 579
 580 void wxComboBox::OnChar( wxKeyEvent &event )
 581 {
 582     if ( event.KeyCode() == WXK_RETURN )
 583     {
 584         wxString value = GetValue();
 585
 586         if ( Number() == 0 )
 587         {
 588             // make Enter generate "selected" event if there is only one item
 589             // in the combobox - without it, it's impossible to select it at
 590             // all!
 591             wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, GetId() );
 592             event.SetInt( 0 );
 593             event.SetString( value );
 594             event.SetEventObject( this );
 595             GetEventHandler()->ProcessEvent( event );
 596         }
 597         else
 598         {
 599             // add the item to the list if it's not there yet
 600             if ( FindString(value) == wxNOT_FOUND )
 601             {
 602                 Append(value);
 603                 SetStringSelection(value);
 604
 605                 // and generate the selected event for it
 606                 wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, GetId() );
 607                 event.SetInt( Number() - 1 );
 608                 event.SetString( value );
 609                 event.SetEventObject( this );
 610                 GetEventHandler()->ProcessEvent( event );
 611             }
 612             //else: do nothing, this will open the listbox
 613         }
 614     }
 615
 616     event.Skip();
 617 }
 618
 619 void wxComboBox::DisableEvents()
 620 {
 621     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 622     GList *child = list->children;
 623     while (child)
 624     {
 625         gtk_signal_disconnect_by_func( GTK_OBJECT(child->data),
 626           GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
 627
 628         child = child->next;
 629     }
 630 }
 631
 632 void wxComboBox::EnableEvents()
 633 {
 634     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 635     GList *child = list->children;
 636     while (child)
 637     {
 638         gtk_signal_connect( GTK_OBJECT(child->data), "select",
 639           GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
 640
 641         child = child->next;
 642     }
 643 }
 644
 645 void wxComboBox::OnSize( wxSizeEvent &event )
 646 {
 647     event.Skip();
 648
 649 #if 0
 650     int w = 21;
 651     gtk_widget_set_usize( GTK_COMBO(m_widget)->entry, m_width-w-1, m_height );
 652
 653     gtk_widget_set_uposition( GTK_COMBO(m_widget)->button, m_x+m_width-w, m_y );
 654     gtk_widget_set_usize( GTK_COMBO(m_widget)->button, w, m_height );
 655 #endif // 0
 656 }
 657
 658 void wxComboBox::ApplyWidgetStyle()
 659 {
 660     SetWidgetStyle();
 661
 662 //    gtk_widget_set_style( GTK_COMBO(m_widget)->button, m_widgetStyle );
 663     gtk_widget_set_style( GTK_COMBO(m_widget)->entry, m_widgetStyle );
 664     gtk_widget_set_style( GTK_COMBO(m_widget)->list, m_widgetStyle );
 665
 666     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 667     GList *child = list->children;
 668     while (child)
 669     {
 670         gtk_widget_set_style( GTK_WIDGET(child->data), m_widgetStyle );
 671
 672         GtkBin *bin = GTK_BIN(child->data);
 673         gtk_widget_set_style( bin->child, m_widgetStyle );
 674
 675         child = child->next;
 676     }
 677 }
 678
 679 GtkWidget* wxComboBox::GetConnectWidget()
 680 {
 681     return GTK_COMBO(m_widget)->entry;
 682 }
 683
 684 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 685 {
 686     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 687              (window == GTK_COMBO(m_widget)->button->window ) );
 688 }
 689
 690 wxSize wxComboBox::DoGetBestSize() const
 691 {
 692     wxSize ret( wxControl::DoGetBestSize() );
 693
 694     // we know better our horizontal extent: it depends on the longest string
 695     // in the combobox
 696     ret.x = 0;
 697     if ( m_widget )
 698     {
 699         GdkFont *font = m_font.GetInternalFont();
 700
 701         wxCoord width;
 702         size_t count = Number();
 703         for ( size_t n = 0; n < count; n++ )
 704         {
 705             width = (wxCoord)gdk_string_width(font, GetString(n).mbc_str());
 706             if ( width > ret.x )
 707                 ret.x = width;
 708         }
 709     }
 710
 711     // empty combobox should have some reasonable default size too
 712     if ( ret.x < 100 )
 713         ret.x = 100;
 714     return ret;
 715 }
 716
 717 #endif