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