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