src/gtk/combobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/combobox.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #if wxUSE_COMBOBOX
  14
  15 #include "wx/combobox.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/intl.h"
  19     #include "wx/settings.h"
  20     #include "wx/textctrl.h"    // for wxEVT_COMMAND_TEXT_UPDATED
  21     #include "wx/arrstr.h"
  22 #endif
  23
  24 // We use GtkCombo which has been deprecated since GTK+ 2.3.0
  25 // in favour of GtkComboBox for <GTK2.4 runtime
  26 // We also use GtkList
  27 #ifdef GTK_DISABLE_DEPRECATED
  28 #undef GTK_DISABLE_DEPRECATED
  29 #endif
  30 #include "wx/gtk/private.h"
  31
  32 //-----------------------------------------------------------------------------
  33 // data
  34 //-----------------------------------------------------------------------------
  35
  36 extern bool   g_blockEventsOnDrag;
  37 static int    g_SelectionBeforePopup = wxID_NONE; // this means the popup is hidden
  38
  39 //-----------------------------------------------------------------------------
  40 //  "changed" - typing and list item matches get changed, select-child
  41 //              if it doesn't match an item then just get a single changed
  42 //-----------------------------------------------------------------------------
  43
  44 extern "C" {
  45 static void
  46 gtkcombo_text_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  47 {
  48     if (combo->m_ignoreNextUpdate)
  49     {
  50         combo->m_ignoreNextUpdate = false;
  51         return;
  52     }
  53
  54     if (!combo->m_hasVMT) return;
  55
  56     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  57     event.SetString( combo->GetValue() );
  58     event.SetEventObject( combo );
  59     combo->GetEventHandler()->ProcessEvent( event );
  60 }
  61 }
  62
  63 extern "C" {
  64 static void
  65 gtkcombo_dummy_callback(GtkEntry *WXUNUSED(entry), GtkCombo *WXUNUSED(combo))
  66 {
  67 }
  68 }
  69
  70 extern "C" {
  71 static void
  72 gtkcombo_popup_hide_callback(GtkCombo *WXUNUSED(gtk_combo), wxComboBox *combo)
  73 {
  74     // when the popup is hidden, throw a SELECTED event only if the combobox
  75     // selection changed.
  76     const int curSelection = combo->GetCurrentSelection();
  77
  78     const bool hasChanged = curSelection != g_SelectionBeforePopup;
  79
  80     // reset the selection flag to value meaning that it is hidden and do it
  81     // now, before generating the events, so that GetSelection() returns the
  82     // new value from the event handler
  83     g_SelectionBeforePopup = wxID_NONE;
  84
  85     if ( hasChanged )
  86     {
  87         wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
  88         event.SetInt( curSelection );
  89         event.SetString( combo->GetStringSelection() );
  90         event.SetEventObject( combo );
  91         combo->GetEventHandler()->ProcessEvent( event );
  92
  93         // for consistency with the other ports, send TEXT event
  94         wxCommandEvent event2( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  95         event2.SetString( combo->GetStringSelection() );
  96         event2.SetEventObject( combo );
  97         combo->GetEventHandler()->ProcessEvent( event2 );
  98     }
  99 }
 100 }
 101
 102 extern "C" {
 103 static void
 104 gtkcombo_popup_show_callback(GtkCombo *WXUNUSED(gtk_combo), wxComboBox *combo)
 105 {
 106     // store the combobox selection value before the popup is shown
 107     g_SelectionBeforePopup = combo->GetCurrentSelection();
 108 }
 109 }
 110
 111 //-----------------------------------------------------------------------------
 112 // "select-child" - click/cursor get select-child, changed, select-child
 113 //-----------------------------------------------------------------------------
 114
 115 extern "C" {
 116 static void
 117 gtkcombo_combo_select_child_callback( GtkList *WXUNUSED(list), GtkWidget *WXUNUSED(widget), wxComboBox *combo )
 118 {
 119     if (!combo->m_hasVMT) return;
 120
 121     if (g_blockEventsOnDrag) return;
 122
 123     int curSelection = combo->GetCurrentSelection();
 124
 125     if (combo->m_prevSelection == curSelection) return;
 126
 127     GtkWidget *list = GTK_COMBO(combo->m_widget)->list;
 128     gtk_list_unselect_item( GTK_LIST(list), combo->m_prevSelection );
 129
 130     combo->m_prevSelection = curSelection;
 131
 132     // Quickly set the value of the combo box
 133     // as GTK+ does that only AFTER the event
 134     // is sent.
 135     GtkWidget* entry = GTK_COMBO(combo->GetHandle())->entry;
 136     g_signal_handlers_block_by_func(
 137         entry, (gpointer)gtkcombo_text_changed_callback, combo);
 138     combo->SetValue( combo->GetStringSelection() );
 139     g_signal_handlers_unblock_by_func(
 140         entry, (gpointer)gtkcombo_text_changed_callback, combo);
 141
 142     // throw a SELECTED event only if the combobox popup is hidden (wxID_NONE)
 143     // because when combobox popup is shown, gtkcombo_combo_select_child_callback is
 144     // called each times the mouse is over an item with a pressed button so a lot
 145     // of SELECTED event could be generated if the user keep the mouse button down
 146     // and select other items ...
 147     if (g_SelectionBeforePopup == wxID_NONE)
 148     {
 149         wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
 150         event.SetInt( curSelection );
 151         event.SetString( combo->GetStringSelection() );
 152         event.SetEventObject( combo );
 153         combo->GetEventHandler()->ProcessEvent( event );
 154
 155         // for consistency with the other ports, don't generate text update
 156         // events while the user is browsing the combobox neither
 157         wxCommandEvent event2( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
 158         event2.SetString( combo->GetValue() );
 159         event2.SetEventObject( combo );
 160         combo->GetEventHandler()->ProcessEvent( event2 );
 161     }
 162 }
 163 }
 164
 165 #ifdef __WXGTK24__
 166 extern "C" {
 167 static void
 168 gtkcombobox_text_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
 169 {
 170     if (!combo->m_hasVMT) return;
 171
 172     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
 173     event.SetString( combo->GetValue() );
 174     event.SetEventObject( combo );
 175     combo->GetEventHandler()->ProcessEvent( event );
 176 }
 177 }
 178
 179 extern "C" {
 180 static void
 181 gtkcombobox_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
 182 {
 183     if (!combo->m_hasVMT) return;
 184
 185     if (combo->GetSelection() == -1)
 186         return;
 187
 188     wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
 189     event.SetInt( combo->GetSelection() );
 190     event.SetString( combo->GetStringSelection() );
 191     event.SetEventObject( combo );
 192     combo->GetEventHandler()->ProcessEvent( event );
 193 }
 194 }
 195
 196 #endif
 197
 198 //-----------------------------------------------------------------------------
 199 // wxComboBox
 200 //-----------------------------------------------------------------------------
 201
 202 IMPLEMENT_DYNAMIC_CLASS(wxComboBox,wxControl)
 203
 204 BEGIN_EVENT_TABLE(wxComboBox, wxControl)
 205     EVT_SIZE(wxComboBox::OnSize)
 206     EVT_CHAR(wxComboBox::OnChar)
 207
 208     EVT_MENU(wxID_CUT, wxComboBox::OnCut)
 209     EVT_MENU(wxID_COPY, wxComboBox::OnCopy)
 210     EVT_MENU(wxID_PASTE, wxComboBox::OnPaste)
 211     EVT_MENU(wxID_UNDO, wxComboBox::OnUndo)
 212     EVT_MENU(wxID_REDO, wxComboBox::OnRedo)
 213     EVT_MENU(wxID_CLEAR, wxComboBox::OnDelete)
 214     EVT_MENU(wxID_SELECTALL, wxComboBox::OnSelectAll)
 215
 216     EVT_UPDATE_UI(wxID_CUT, wxComboBox::OnUpdateCut)
 217     EVT_UPDATE_UI(wxID_COPY, wxComboBox::OnUpdateCopy)
 218     EVT_UPDATE_UI(wxID_PASTE, wxComboBox::OnUpdatePaste)
 219     EVT_UPDATE_UI(wxID_UNDO, wxComboBox::OnUpdateUndo)
 220     EVT_UPDATE_UI(wxID_REDO, wxComboBox::OnUpdateRedo)
 221     EVT_UPDATE_UI(wxID_CLEAR, wxComboBox::OnUpdateDelete)
 222     EVT_UPDATE_UI(wxID_SELECTALL, wxComboBox::OnUpdateSelectAll)
 223 END_EVENT_TABLE()
 224
 225 bool wxComboBox::Create( wxWindow *parent, wxWindowID id,
 226                          const wxString& value,
 227                          const wxPoint& pos, const wxSize& size,
 228                          const wxArrayString& choices,
 229                          long style, const wxValidator& validator,
 230                          const wxString& name )
 231 {
 232     wxCArrayString chs(choices);
 233
 234     return Create( parent, id, value, pos, size, chs.GetCount(),
 235                    chs.GetStrings(), style, validator, name );
 236 }
 237
 238 bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
 239                          const wxPoint& pos, const wxSize& size,
 240                          int n, const wxString choices[],
 241                          long style, const wxValidator& validator,
 242                          const wxString& name )
 243 {
 244     m_strings = NULL;
 245     m_ignoreNextUpdate = false;
 246     m_prevSelection = 0;
 247
 248     if (!PreCreation( parent, pos, size ) ||
 249         !CreateBase( parent, id, pos, size, style, validator, name ))
 250     {
 251         wxFAIL_MSG( wxT("wxComboBox creation failed") );
 252         return false;
 253     }
 254
 255     if(HasFlag(wxCB_SORT))
 256         m_strings = new wxSortedArrayString();
 257
 258 #ifdef __WXGTK24__
 259     if (!gtk_check_version(2,4,0))
 260     {
 261         m_widget = gtk_combo_box_entry_new_text();
 262
 263         gtk_entry_set_editable( GTK_ENTRY( GTK_BIN(m_widget)->child ), TRUE );
 264     }
 265     else
 266 #endif
 267     {
 268         m_widget = gtk_combo_new();
 269         GtkCombo* combo = GTK_COMBO(m_widget);
 270
 271         // Disable GTK's broken events ...
 272         g_signal_handler_disconnect (combo->entry, combo->entry_change_id);
 273         // ... and add surrogate handler.
 274         combo->entry_change_id = g_signal_connect (combo->entry, "changed",
 275                                                G_CALLBACK (gtkcombo_dummy_callback),
 276                                                combo);
 277
 278         // make it more useable
 279         gtk_combo_set_use_arrows_always( GTK_COMBO(m_widget), TRUE );
 280
 281         // and case-sensitive
 282         gtk_combo_set_case_sensitive( GTK_COMBO(m_widget), TRUE );
 283
 284         if (style & wxNO_BORDER)
 285             g_object_set (combo->entry, "has-frame", FALSE, NULL );
 286     }
 287
 288     Append(n, choices);
 289
 290     m_parent->DoAddChild( this );
 291
 292     GtkEntry *entry = NULL;
 293 #ifdef __WXGTK24__
 294     if (!gtk_check_version(2,4,0))
 295         entry = GTK_ENTRY( GTK_BIN(m_widget)->child );
 296     else
 297 #endif
 298         entry = GTK_ENTRY( GTK_COMBO(m_widget)->entry );
 299
 300     m_focusWidget = GTK_WIDGET( entry );
 301
 302     PostCreation(size);
 303
 304 #ifdef __WXGTK24__
 305     if (!gtk_check_version(2,4,0))
 306         ConnectWidget( m_widget );
 307     else
 308 #endif
 309         ConnectWidget( GTK_COMBO(m_widget)->button );
 310
 311 #ifdef __WXGTK24__
 312     if (!gtk_check_version(2,4,0))
 313     {
 314         gtk_entry_set_text( entry, wxGTK_CONV(value) );
 315
 316         if (style & wxCB_READONLY)
 317             gtk_entry_set_editable( entry, FALSE );
 318
 319         g_signal_connect_after (entry, "changed",
 320                             G_CALLBACK (gtkcombobox_text_changed_callback), this);
 321
 322         g_signal_connect_after (m_widget, "changed",
 323                             G_CALLBACK (gtkcombobox_changed_callback), this);
 324
 325     }
 326     else
 327 #endif
 328     {
 329         GtkCombo *combo = GTK_COMBO(m_widget);
 330         // MSW's combo box shows the value and the selection is -1
 331         gtk_entry_set_text( entry, wxGTK_CONV(value) );
 332         gtk_list_unselect_all( GTK_LIST(combo->list) );
 333
 334         if (style & wxCB_READONLY)
 335             gtk_entry_set_editable( entry, FALSE );
 336
 337         // "show" and "hide" events are generated when user click on the combobox button which popups a list
 338         // this list is the "popwin" gtk widget
 339         g_signal_connect (GTK_COMBO(combo)->popwin, "hide",
 340                       G_CALLBACK (gtkcombo_popup_hide_callback), this);
 341         g_signal_connect (GTK_COMBO(combo)->popwin, "show",
 342                       G_CALLBACK (gtkcombo_popup_show_callback), this);
 343         g_signal_connect_after (combo->list, "select-child",
 344                             G_CALLBACK (gtkcombo_combo_select_child_callback),
 345                             this);
 346         g_signal_connect_after (entry, "changed",
 347                             G_CALLBACK (gtkcombo_text_changed_callback), this);
 348     }
 349
 350     SetInitialSize(size); // need this too because this is a wxControlWithItems
 351
 352     return true;
 353 }
 354
 355 GtkEditable *wxComboBox::GetEditable() const
 356 {
 357 #ifdef __WXGTK24__
 358     if ( !gtk_check_version(2,4,0) )
 359         return GTK_EDITABLE( GTK_BIN(m_widget)->child );
 360     else
 361 #endif
 362         return GTK_EDITABLE( GTK_COMBO(m_widget)->entry );
 363 }
 364
 365 wxComboBox::~wxComboBox()
 366 {
 367     Clear();
 368
 369     delete m_strings;
 370 }
 371
 372 void wxComboBox::SetFocus()
 373 {
 374     if ( m_hasFocus )
 375     {
 376         // don't do anything if we already have focus
 377         return;
 378     }
 379
 380     gtk_widget_grab_focus( m_focusWidget );
 381 }
 382
 383 int wxComboBox::DoInsertItems(const wxArrayStringsAdapter & items,
 384                               unsigned int pos,
 385                               void **clientData, wxClientDataType type)
 386 {
 387     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 388
 389     wxASSERT_MSG( !IsSorted() || (pos == GetCount()),
 390                  _T("In a sorted combobox data could only be appended"));
 391
 392     const int count = items.GetCount();
 393
 394     int n = wxNOT_FOUND;
 395
 396 #ifdef __WXGTK24__
 397     if (!gtk_check_version(2,4,0))
 398     {
 399         GtkComboBox* combobox = GTK_COMBO_BOX( m_widget );
 400         for( int i = 0; i < count; ++i )
 401         {
 402             n = pos + i;
 403             // If sorted, use this wxSortedArrayStrings to determine
 404             // the right insertion point
 405             if(m_strings)
 406                 n = m_strings->Add(items[i]);
 407
 408             gtk_combo_box_insert_text( combobox, n, wxGTK_CONV( items[i] ) );
 409
 410             m_clientData.Insert( NULL, n );
 411             AssignNewItemClientData(n, clientData, i, type);
 412         }
 413     }
 414     else
 415 #endif
 416     {
 417         DisableEvents();
 418
 419         GtkWidget *list = GTK_COMBO(m_widget)->list;
 420         for( int i = 0; i < count; ++i )
 421         {
 422             n = pos + i;
 423             // If sorted, use this wxSortedArrayStrings to determine
 424             // the right insertion point
 425             if(m_strings)
 426                 n = m_strings->Add(items[i]);
 427
 428             GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( items[i] ) );
 429
 430             // TODO construct a list with all items and call gtk_list_insert_items once?
 431             GList *gitem_list = g_list_alloc ();
 432             gitem_list->data = list_item;
 433             gtk_list_insert_items( GTK_LIST (list), gitem_list, n );
 434
 435             m_clientData.Insert( NULL, n );
 436             AssignNewItemClientData(n, clientData, i, type);
 437
 438             if (GTK_WIDGET_REALIZED(m_widget))
 439             {
 440                 gtk_widget_realize( list_item );
 441                 gtk_widget_realize( GTK_BIN(list_item)->child );
 442
 443                 ApplyWidgetStyle();
 444             }
 445
 446             gtk_widget_show( list_item );
 447         }
 448
 449         EnableEvents();
 450     }
 451
 452     InvalidateBestSize();
 453
 454     return n;
 455 }
 456
 457 void wxComboBox::DoSetItemClientData(unsigned int n, void* clientData)
 458 {
 459     m_clientData[n] = clientData;
 460 }
 461
 462 void* wxComboBox::DoGetItemClientData(unsigned int n) const
 463 {
 464     return m_clientData[n];
 465 }
 466
 467 void wxComboBox::DoClear()
 468 {
 469     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 470
 471     DisableEvents();
 472
 473 #ifdef __WXGTK24__
 474     if (!gtk_check_version(2,4,0))
 475     {
 476         GtkComboBox* combobox = GTK_COMBO_BOX( m_widget );
 477         const unsigned int count = GetCount();
 478         for (unsigned int i = 0; i < count; i++)
 479             gtk_combo_box_remove_text( combobox, 0 );
 480     }
 481     else // GTK+ < 2.4.0
 482 #endif // __WXGTK24__
 483     {
 484         GtkWidget *list = GTK_COMBO(m_widget)->list;
 485         gtk_list_clear_items( GTK_LIST(list), 0, GetCount() );
 486     }
 487
 488     m_clientData.Clear();
 489
 490     if(m_strings)
 491         m_strings->Clear();
 492
 493     EnableEvents();
 494
 495     InvalidateBestSize();
 496 }
 497
 498 void wxComboBox::DoDeleteOneItem(unsigned int n)
 499 {
 500     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 501
 502 #ifdef __WXGTK24__
 503     if (!gtk_check_version(2,4,0))
 504     {
 505         wxCHECK_RET( IsValid(n), wxT("invalid index") );
 506
 507         GtkComboBox* combobox = GTK_COMBO_BOX( m_widget );
 508         gtk_combo_box_remove_text( combobox, n );
 509     }
 510     else
 511 #endif
 512     {
 513         GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 514
 515         GList *child = g_list_nth( listbox->children, n );
 516
 517         if (!child)
 518         {
 519             wxFAIL_MSG(wxT("wrong index"));
 520             return;
 521         }
 522
 523         DisableEvents();
 524
 525         GList *list = g_list_append( (GList*) NULL, child->data );
 526         gtk_list_remove_items( listbox, list );
 527         g_list_free( list );
 528
 529         EnableEvents();
 530     }
 531
 532     m_clientData.RemoveAt( n );
 533     if(m_strings)
 534         m_strings->RemoveAt( n );
 535
 536     InvalidateBestSize();
 537 }
 538
 539 void wxComboBox::SetString(unsigned int n, const wxString &text)
 540 {
 541     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 542
 543 #ifdef __WXGTK24__
 544     if (!gtk_check_version(2,4,0))
 545     {
 546         GtkComboBox* combobox = GTK_COMBO_BOX( m_widget );
 547         wxCHECK_RET( IsValid(n), wxT("invalid index") );
 548
 549         GtkTreeModel *model = gtk_combo_box_get_model( combobox );
 550         GtkTreeIter iter;
 551         if (gtk_tree_model_iter_nth_child (model, &iter, NULL, n))
 552         {
 553             GValue value = { 0, };
 554             g_value_init( &value, G_TYPE_STRING );
 555             g_value_set_string( &value, wxGTK_CONV( text ) );
 556             gtk_list_store_set_value( GTK_LIST_STORE(model), &iter, 0, &value );
 557             g_value_unset( &value );
 558         }
 559     }
 560     else
 561 #endif
 562     {
 563         GtkWidget *list = GTK_COMBO(m_widget)->list;
 564
 565         GList *child = g_list_nth( GTK_LIST(list)->children, n );
 566         if (child)
 567         {
 568             GtkBin *bin = GTK_BIN( child->data );
 569             GtkLabel *label = GTK_LABEL( bin->child );
 570             gtk_label_set_text(label, wxGTK_CONV(text));
 571         }
 572         else
 573         {
 574             wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 575         }
 576     }
 577
 578     InvalidateBestSize();
 579 }
 580
 581 int wxComboBox::FindString( const wxString &item, bool bCase ) const
 582 {
 583     wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid combobox") );
 584
 585 #ifdef __WXGTK24__
 586     if (!gtk_check_version(2,4,0))
 587     {
 588         GtkComboBox* combobox = GTK_COMBO_BOX( m_widget );
 589         GtkTreeModel* model = gtk_combo_box_get_model( combobox );
 590         GtkTreeIter iter;
 591         gtk_tree_model_get_iter_first( model, &iter );
 592         if (!gtk_list_store_iter_is_valid(GTK_LIST_STORE(model), &iter ))
 593             return -1;
 594         int count = 0;
 595         do
 596         {
 597             GValue value = { 0, };
 598             gtk_tree_model_get_value( model, &iter, 0, &value );
 599             wxString str = wxGTK_CONV_BACK( g_value_get_string( &value ) );
 600             g_value_unset( &value );
 601
 602             if (item.IsSameAs( str, bCase ) )
 603                 return count;
 604
 605             count++;
 606
 607         } while (gtk_tree_model_iter_next( model, &iter ));
 608     }
 609     else
 610 #endif
 611     {
 612         GtkWidget *list = GTK_COMBO(m_widget)->list;
 613
 614         GList *child = GTK_LIST(list)->children;
 615         int count = 0;
 616         while (child)
 617         {
 618             GtkBin *bin = GTK_BIN( child->data );
 619             GtkLabel *label = GTK_LABEL( bin->child );
 620             wxString str( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 621
 622             if (item.IsSameAs( str , bCase ) )
 623                 return count;
 624
 625             count++;
 626             child = child->next;
 627         }
 628     }
 629
 630     return wxNOT_FOUND;
 631 }
 632
 633 int wxComboBox::GetSelection() const
 634 {
 635 #ifdef __WXGTK24__
 636     if (!gtk_check_version(2,4,0))
 637     {
 638         GtkComboBox* combobox = GTK_COMBO_BOX( m_widget );
 639         return gtk_combo_box_get_active( combobox );
 640     }
 641     else
 642 #endif
 643         // if the popup is currently opened, use the selection as it had been
 644         // before it dropped down
 645         return g_SelectionBeforePopup == wxID_NONE ? GetCurrentSelection()
 646                                                : g_SelectionBeforePopup;
 647 }
 648
 649 int wxComboBox::GetCurrentSelection() const
 650 {
 651     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 652
 653 #ifdef __WXGTK24__
 654     if (!gtk_check_version(2,4,0))
 655     {
 656         GtkComboBox* combobox = GTK_COMBO_BOX( m_widget );
 657         return gtk_combo_box_get_active( combobox );
 658     }
 659     else
 660 #endif
 661     {
 662         GtkWidget *list = GTK_COMBO(m_widget)->list;
 663
 664         GList *selection = GTK_LIST(list)->selection;
 665         if (selection)
 666         {
 667             GList *child = GTK_LIST(list)->children;
 668             int count = 0;
 669             while (child)
 670             {
 671                 if (child->data == selection->data) return count;
 672                 count++;
 673                 child = child->next;
 674             }
 675         }
 676     }
 677
 678     return -1;
 679 }
 680
 681 wxString wxComboBox::GetString(unsigned int n) const
 682 {
 683     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 684
 685     wxString str;
 686
 687 #ifdef __WXGTK24__
 688     if (!gtk_check_version(2,4,0))
 689     {
 690         GtkComboBox* combobox = GTK_COMBO_BOX( m_widget );
 691         GtkTreeModel *model = gtk_combo_box_get_model( combobox );
 692         GtkTreeIter iter;
 693         if (gtk_tree_model_iter_nth_child (model, &iter, NULL, n))
 694         {
 695             GValue value = { 0, };
 696             gtk_tree_model_get_value( model, &iter, 0, &value );
 697             wxString tmp = wxGTK_CONV_BACK( g_value_get_string( &value ) );
 698             g_value_unset( &value );
 699             return tmp;
 700         }
 701     }
 702     else
 703 #endif
 704     {
 705         GtkWidget *list = GTK_COMBO(m_widget)->list;
 706
 707         GList *child = g_list_nth( GTK_LIST(list)->children, n );
 708         if (child)
 709         {
 710             GtkBin *bin = GTK_BIN( child->data );
 711             GtkLabel *label = GTK_LABEL( bin->child );
 712             str = wxGTK_CONV_BACK( gtk_label_get_text(label) );
 713         }
 714         else
 715         {
 716             wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 717         }
 718     }
 719
 720     return str;
 721 }
 722
 723 unsigned int wxComboBox::GetCount() const
 724 {
 725     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 726
 727 #ifdef __WXGTK24__
 728     if (!gtk_check_version(2,4,0))
 729     {
 730         GtkComboBox* combobox = GTK_COMBO_BOX( m_widget );
 731         GtkTreeModel* model = gtk_combo_box_get_model( combobox );
 732         GtkTreeIter iter;
 733         gtk_tree_model_get_iter_first( model, &iter );
 734         if (!gtk_list_store_iter_is_valid(GTK_LIST_STORE(model), &iter ))
 735             return 0;
 736         unsigned int ret = 1;
 737         while (gtk_tree_model_iter_next( model, &iter ))
 738             ret++;
 739         return ret;
 740     }
 741     else
 742 #endif
 743     {
 744         GtkWidget *list = GTK_COMBO(m_widget)->list;
 745
 746         GList *child = GTK_LIST(list)->children;
 747         unsigned int count = 0;
 748         while (child)
 749         {
 750             count++;
 751             child = child->next;
 752         }
 753         return count;
 754     }
 755 }
 756
 757 void wxComboBox::SetSelection( int n )
 758 {
 759     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 760
 761     DisableEvents();
 762
 763 #ifdef __WXGTK24__
 764     if (!gtk_check_version(2,4,0))
 765     {
 766         GtkComboBox* combobox = GTK_COMBO_BOX( m_widget );
 767         gtk_combo_box_set_active( combobox, n );
 768     }
 769     else
 770 #endif
 771     {
 772         GtkWidget *list = GTK_COMBO(m_widget)->list;
 773         gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 774         gtk_list_select_item( GTK_LIST(list), n );
 775         m_prevSelection = n;
 776     }
 777
 778     EnableEvents();
 779 }
 780
 781 void wxComboBox::OnChar( wxKeyEvent &event )
 782 {
 783     switch ( event.GetKeyCode() )
 784     {
 785         case WXK_RETURN:
 786             if ( HasFlag(wxTE_PROCESS_ENTER) )
 787             {
 788                 // GTK automatically selects an item if its in the list
 789                 wxCommandEvent eventEnter(wxEVT_COMMAND_TEXT_ENTER, GetId());
 790                 eventEnter.SetString( GetValue() );
 791                 eventEnter.SetInt( GetSelection() );
 792                 eventEnter.SetEventObject( this );
 793
 794                 if ( GetEventHandler()->ProcessEvent(eventEnter) )
 795                 {
 796                     // Catch GTK event so that GTK doesn't open the drop
 797                     // down list upon RETURN.
 798                     return;
 799                 }
 800             }
 801             break;
 802     }
 803
 804     event.Skip();
 805 }
 806
 807 void wxComboBox::DisableEvents()
 808 {
 809 #ifdef __WXGTK24__
 810     if (!gtk_check_version(2,4,0))
 811     {
 812         g_signal_handlers_block_by_func(GTK_BIN(m_widget)->child,
 813             (gpointer)gtkcombobox_text_changed_callback, this);
 814
 815         g_signal_handlers_block_by_func(m_widget,
 816             (gpointer)gtkcombobox_changed_callback, this);
 817     }
 818     else
 819 #endif
 820     {
 821         g_signal_handlers_block_by_func(GTK_COMBO(m_widget)->list,
 822             (gpointer) gtkcombo_combo_select_child_callback, this);
 823
 824         g_signal_handlers_block_by_func(GTK_COMBO(m_widget)->entry,
 825             (gpointer) gtkcombo_text_changed_callback, this);
 826     }
 827 }
 828
 829 void wxComboBox::EnableEvents()
 830 {
 831 #ifdef __WXGTK24__
 832     if (!gtk_check_version(2,4,0))
 833     {
 834         g_signal_handlers_unblock_by_func(GTK_BIN(m_widget)->child,
 835             (gpointer)gtkcombobox_text_changed_callback, this);
 836
 837         g_signal_handlers_unblock_by_func(m_widget,
 838             (gpointer)gtkcombobox_changed_callback, this);
 839     }
 840     else
 841 #endif
 842     {
 843         g_signal_handlers_unblock_by_func(GTK_COMBO(m_widget)->list,
 844             (gpointer) gtkcombo_combo_select_child_callback, this);
 845
 846         g_signal_handlers_unblock_by_func(GTK_COMBO(m_widget)->entry,
 847             (gpointer) gtkcombo_text_changed_callback, this);
 848     }
 849 }
 850
 851 void wxComboBox::OnSize( wxSizeEvent &event )
 852 {
 853 #ifdef __WXGTK24__
 854     if (!gtk_check_version(2,4,0))
 855     {
 856         // Do nothing
 857     }
 858     else
 859 #endif
 860     {
 861         // NB: In some situations (e.g. on non-first page of a wizard, if the
 862         //     size used is default size), GtkCombo widget is resized correctly,
 863         //     but it's look is not updated, it's rendered as if it was much wider.
 864         //     No other widgets are affected, so it looks like a bug in GTK+.
 865         //     Manually requesting resize calculation (as gtk_pizza_set_size does)
 866         //     fixes it.
 867         if (GTK_WIDGET_VISIBLE(m_widget))
 868             gtk_widget_queue_resize(m_widget);
 869     }
 870
 871     event.Skip();
 872 }
 873
 874 void wxComboBox::DoApplyWidgetStyle(GtkRcStyle *style)
 875 {
 876 #ifdef __WXGTK24__
 877     if (!gtk_check_version(2,4,0))
 878     {
 879         // Do nothing
 880     }
 881     else
 882 #endif
 883     {
 884 //    gtk_widget_modify_style( GTK_COMBO(m_widget)->button, syle );
 885
 886         gtk_widget_modify_style( GTK_COMBO(m_widget)->entry, style );
 887         gtk_widget_modify_style( GTK_COMBO(m_widget)->list, style );
 888
 889         GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 890         GList *child = list->children;
 891         while (child)
 892         {
 893             gtk_widget_modify_style( GTK_WIDGET(child->data), style );
 894
 895             GtkBin *bin = GTK_BIN(child->data);
 896             gtk_widget_modify_style( bin->child, style );
 897
 898             child = child->next;
 899         }
 900     }
 901 }
 902
 903 GtkWidget* wxComboBox::GetConnectWidget()
 904 {
 905     GtkEntry *entry = NULL;
 906 #ifdef __WXGTK24__
 907     if (!gtk_check_version(2,4,0))
 908         entry = GTK_ENTRY( GTK_BIN(m_widget)->child );
 909     else
 910 #endif
 911         entry = GTK_ENTRY( GTK_COMBO(m_widget)->entry );
 912
 913     return GTK_WIDGET( entry );
 914 }
 915
 916 GdkWindow *wxComboBox::GTKGetWindow(wxArrayGdkWindows& windows) const
 917 {
 918 #ifdef __WXGTK24__
 919     if (!gtk_check_version(2,4,0))
 920     {
 921         wxUnusedVar(windows);
 922
 923         return GTK_ENTRY(GTK_BIN(m_widget)->child)->text_area;
 924     }
 925     else
 926 #endif // GTK+ 2.4
 927     {
 928         windows.push_back(GTK_ENTRY(GTK_COMBO(m_widget)->entry)->text_area);
 929         windows.push_back(GTK_COMBO(m_widget)->button->window);
 930
 931         // indicate that we return multiple windows in the windows array
 932         return NULL;
 933     }
 934 }
 935
 936 wxSize wxComboBox::DoGetBestSize() const
 937 {
 938     wxSize ret( wxControl::DoGetBestSize() );
 939
 940     // we know better our horizontal extent: it depends on the longest string
 941     // in the combobox
 942     if ( m_widget )
 943     {
 944         int width;
 945         unsigned int count = GetCount();
 946         for ( unsigned int n = 0; n < count; n++ )
 947         {
 948             GetTextExtent(GetString(n), &width, NULL, NULL, NULL );
 949             if ( width > ret.x )
 950                 ret.x = width;
 951         }
 952     }
 953
 954     // empty combobox should have some reasonable default size too
 955     if ( ret.x < 100 )
 956         ret.x = 100;
 957
 958     CacheBestSize(ret);
 959     return ret;
 960 }
 961
 962 // static
 963 wxVisualAttributes
 964 wxComboBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 965 {
 966 #ifdef __WXGTK24__
 967     if (!gtk_check_version(2,4,0))
 968         return GetDefaultAttributesFromGTKWidget(gtk_combo_box_entry_new, true);
 969     else
 970 #endif
 971         return GetDefaultAttributesFromGTKWidget(gtk_combo_new, true);
 972 }
 973
 974 // ----------------------------------------------------------------------------
 975 // standard event handling
 976 // ----------------------------------------------------------------------------
 977
 978 void wxComboBox::OnCut(wxCommandEvent& WXUNUSED(event))
 979 {
 980     Cut();
 981 }
 982
 983 void wxComboBox::OnCopy(wxCommandEvent& WXUNUSED(event))
 984 {
 985     Copy();
 986 }
 987
 988 void wxComboBox::OnPaste(wxCommandEvent& WXUNUSED(event))
 989 {
 990     Paste();
 991 }
 992
 993 void wxComboBox::OnUndo(wxCommandEvent& WXUNUSED(event))
 994 {
 995     Undo();
 996 }
 997
 998 void wxComboBox::OnRedo(wxCommandEvent& WXUNUSED(event))
 999 {
1000     Redo();
1001 }
1002
1003 void wxComboBox::OnDelete(wxCommandEvent& WXUNUSED(event))
1004 {
1005     long from, to;
1006     GetSelection(& from, & to);
1007     if (from != -1 && to != -1)
1008         Remove(from, to);
1009 }
1010
1011 void wxComboBox::OnSelectAll(wxCommandEvent& WXUNUSED(event))
1012 {
1013     SetSelection(-1, -1);
1014 }
1015
1016 void wxComboBox::OnUpdateCut(wxUpdateUIEvent& event)
1017 {
1018     event.Enable( CanCut() );
1019 }
1020
1021 void wxComboBox::OnUpdateCopy(wxUpdateUIEvent& event)
1022 {
1023     event.Enable( CanCopy() );
1024 }
1025
1026 void wxComboBox::OnUpdatePaste(wxUpdateUIEvent& event)
1027 {
1028     event.Enable( CanPaste() );
1029 }
1030
1031 void wxComboBox::OnUpdateUndo(wxUpdateUIEvent& event)
1032 {
1033     event.Enable( CanUndo() );
1034 }
1035
1036 void wxComboBox::OnUpdateRedo(wxUpdateUIEvent& event)
1037 {
1038     event.Enable( CanRedo() );
1039 }
1040
1041 void wxComboBox::OnUpdateDelete(wxUpdateUIEvent& event)
1042 {
1043     event.Enable(HasSelection() && IsEditable()) ;
1044 }
1045
1046 void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event)
1047 {
1048     event.Enable(GetLastPosition() > 0);
1049 }
1050
1051 #endif // wxUSE_COMBOBOX