src/gtk1/combobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/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_TEXT
  21     #include "wx/arrstr.h"
  22 #endif
  23
  24 #include "wx/gtk1/private.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 static int    g_SelectionBeforePopup = wxID_NONE; // this means the popup is hidden
  39
  40 //-----------------------------------------------------------------------------
  41 //  "changed" - typing and list item matches get changed, select-child
  42 //              if it doesn't match an item then just get a single changed
  43 //-----------------------------------------------------------------------------
  44
  45 extern "C" {
  46 static void
  47 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  48 {
  49     if (g_isIdle) wxapp_install_idle_handler();
  50
  51     if (combo->m_ignoreNextUpdate)
  52     {
  53         combo->m_ignoreNextUpdate = false;
  54         return;
  55     }
  56
  57     if (!combo->m_hasVMT) return;
  58
  59     wxCommandEvent event( wxEVT_TEXT, combo->GetId() );
  60     event.SetString( combo->GetValue() );
  61     event.SetEventObject( combo );
  62     combo->HandleWindowEvent( event );
  63 }
  64 }
  65
  66 extern "C" {
  67 static void
  68 gtk_dummy_callback(GtkEntry *WXUNUSED(entry), GtkCombo *WXUNUSED(combo))
  69 {
  70 }
  71 }
  72
  73 extern "C" {
  74 static void
  75 gtk_popup_hide_callback(GtkCombo *WXUNUSED(gtk_combo), wxComboBox *combo)
  76 {
  77     // when the popup is hidden, throw a SELECTED event only if the combobox
  78     // selection changed.
  79     const int curSelection = combo->GetCurrentSelection();
  80
  81     const bool hasChanged = curSelection != g_SelectionBeforePopup;
  82
  83     // reset the selection flag to value meaning that it is hidden and do it
  84     // now, before generating the events, so that GetSelection() returns the
  85     // new value from the event handler
  86     g_SelectionBeforePopup = wxID_NONE;
  87
  88     if ( hasChanged )
  89     {
  90         wxCommandEvent event( wxEVT_COMBOBOX, combo->GetId() );
  91         event.SetInt( curSelection );
  92         event.SetString( combo->GetStringSelection() );
  93         event.SetEventObject( combo );
  94         combo->HandleWindowEvent( event );
  95
  96         // for consistency with the other ports, send TEXT event
  97         wxCommandEvent event2( wxEVT_TEXT, combo->GetId() );
  98         event2.SetString( combo->GetStringSelection() );
  99         event2.SetEventObject( combo );
 100         combo->HandleWindowEvent( event2 );
 101     }
 102 }
 103 }
 104
 105 extern "C" {
 106 static void
 107 gtk_popup_show_callback(GtkCombo *WXUNUSED(gtk_combo), wxComboBox *combo)
 108 {
 109     // store the combobox selection value before the popup is shown
 110     g_SelectionBeforePopup = combo->GetCurrentSelection();
 111 }
 112 }
 113
 114 //-----------------------------------------------------------------------------
 115 // "select-child" - click/cursor get select-child, changed, select-child
 116 //-----------------------------------------------------------------------------
 117
 118 extern "C" {
 119 static void
 120 gtk_combo_select_child_callback( GtkList *WXUNUSED(list), GtkWidget *WXUNUSED(widget), wxComboBox *combo )
 121 {
 122     if (g_isIdle) wxapp_install_idle_handler();
 123
 124     if (!combo->m_hasVMT) return;
 125
 126     if (g_blockEventsOnDrag) return;
 127
 128     int curSelection = combo->GetCurrentSelection();
 129
 130     if (combo->m_prevSelection == curSelection) return;
 131
 132     GtkWidget *list = GTK_COMBO(combo->m_widget)->list;
 133     gtk_list_unselect_item( GTK_LIST(list), combo->m_prevSelection );
 134
 135     combo->m_prevSelection = curSelection;
 136
 137     // Quickly set the value of the combo box
 138     // as GTK+ does that only AFTER the event
 139     // is sent.
 140     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(combo->GetHandle())->entry),
 141       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)combo );
 142     combo->SetValue( combo->GetStringSelection() );
 143     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(combo->GetHandle())->entry), "changed",
 144       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)combo );
 145
 146     // throw a SELECTED event only if the combobox popup is hidden (wxID_NONE)
 147     // because when combobox popup is shown, gtk_combo_select_child_callback is
 148     // called each times the mouse is over an item with a pressed button so a lot
 149     // of SELECTED event could be generated if the user keep the mouse button down
 150     // and select other items ...
 151     if (g_SelectionBeforePopup == wxID_NONE)
 152     {
 153         wxCommandEvent event( wxEVT_COMBOBOX, combo->GetId() );
 154         event.SetInt( curSelection );
 155         event.SetString( combo->GetStringSelection() );
 156         event.SetEventObject( combo );
 157         combo->HandleWindowEvent( event );
 158
 159         // for consistency with the other ports, don't generate text update
 160         // events while the user is browsing the combobox neither
 161         wxCommandEvent event2( wxEVT_TEXT, combo->GetId() );
 162         event2.SetString( combo->GetValue() );
 163         event2.SetEventObject( combo );
 164         combo->HandleWindowEvent( event2 );
 165     }
 166 }
 167 }
 168
 169 //-----------------------------------------------------------------------------
 170 // wxComboBox
 171 //-----------------------------------------------------------------------------
 172
 173 BEGIN_EVENT_TABLE(wxComboBox, wxControl)
 174     EVT_SIZE(wxComboBox::OnSize)
 175     EVT_CHAR(wxComboBox::OnChar)
 176
 177     EVT_MENU(wxID_CUT, wxComboBox::OnCut)
 178     EVT_MENU(wxID_COPY, wxComboBox::OnCopy)
 179     EVT_MENU(wxID_PASTE, wxComboBox::OnPaste)
 180     EVT_MENU(wxID_UNDO, wxComboBox::OnUndo)
 181     EVT_MENU(wxID_REDO, wxComboBox::OnRedo)
 182     EVT_MENU(wxID_CLEAR, wxComboBox::OnDelete)
 183     EVT_MENU(wxID_SELECTALL, wxComboBox::OnSelectAll)
 184
 185     EVT_UPDATE_UI(wxID_CUT, wxComboBox::OnUpdateCut)
 186     EVT_UPDATE_UI(wxID_COPY, wxComboBox::OnUpdateCopy)
 187     EVT_UPDATE_UI(wxID_PASTE, wxComboBox::OnUpdatePaste)
 188     EVT_UPDATE_UI(wxID_UNDO, wxComboBox::OnUpdateUndo)
 189     EVT_UPDATE_UI(wxID_REDO, wxComboBox::OnUpdateRedo)
 190     EVT_UPDATE_UI(wxID_CLEAR, wxComboBox::OnUpdateDelete)
 191     EVT_UPDATE_UI(wxID_SELECTALL, wxComboBox::OnUpdateSelectAll)
 192 END_EVENT_TABLE()
 193
 194 bool wxComboBox::Create( wxWindow *parent, wxWindowID id,
 195                          const wxString& value,
 196                          const wxPoint& pos, const wxSize& size,
 197                          const wxArrayString& choices,
 198                          long style, const wxValidator& validator,
 199                          const wxString& name )
 200 {
 201     wxCArrayString chs(choices);
 202
 203     return Create( parent, id, value, pos, size, chs.GetCount(),
 204                    chs.GetStrings(), style, validator, name );
 205 }
 206
 207 bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
 208                          const wxPoint& pos, const wxSize& size,
 209                          int n, const wxString choices[],
 210                          long style, const wxValidator& validator,
 211                          const wxString& name )
 212 {
 213     m_ignoreNextUpdate = false;
 214     m_needParent = true;
 215     m_acceptsFocus = true;
 216     m_prevSelection = 0;
 217
 218     if (!PreCreation( parent, pos, size ) ||
 219         !CreateBase( parent, id, pos, size, style, validator, name ))
 220     {
 221         wxFAIL_MSG( wxT("wxComboBox creation failed") );
 222         return false;
 223     }
 224
 225     m_widget = gtk_combo_new();
 226     GtkCombo *combo = GTK_COMBO(m_widget);
 227
 228     // Disable GTK's broken events ...
 229     gtk_signal_disconnect( GTK_OBJECT(combo->entry), combo->entry_change_id );
 230     // ... and add surrogate handler.
 231     combo->entry_change_id = gtk_signal_connect (GTK_OBJECT (combo->entry), "changed",
 232                   (GtkSignalFunc) gtk_dummy_callback, combo);
 233
 234     // make it more useable
 235     gtk_combo_set_use_arrows_always( GTK_COMBO(m_widget), TRUE );
 236
 237     // and case-sensitive
 238     gtk_combo_set_case_sensitive( GTK_COMBO(m_widget), TRUE );
 239
 240     GtkWidget *list = GTK_COMBO(m_widget)->list;
 241
 242     // gtk_list_set_selection_mode( GTK_LIST(list), GTK_SELECTION_MULTIPLE );
 243
 244     for (int i = 0; i < n; i++)
 245     {
 246         GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( choices[i] ) );
 247
 248         m_clientDataList.Append( NULL );
 249         m_clientObjectList.Append( NULL );
 250
 251         gtk_container_add( GTK_CONTAINER(list), list_item );
 252
 253         gtk_widget_show( list_item );
 254     }
 255
 256     m_parent->DoAddChild( this );
 257
 258     m_focusWidget = combo->entry;
 259
 260     PostCreation(size);
 261
 262     ConnectWidget( combo->button );
 263
 264     // MSW's combo box shows the value and the selection is -1
 265     gtk_entry_set_text( GTK_ENTRY(combo->entry), wxGTK_CONV(value) );
 266     gtk_list_unselect_all( GTK_LIST(combo->list) );
 267
 268     if (style & wxCB_READONLY)
 269         gtk_entry_set_editable( GTK_ENTRY( combo->entry ), FALSE );
 270
 271     // "show" and "hide" events are generated when user click on the combobox button which popups a list
 272     // this list is the "popwin" gtk widget
 273     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "hide",
 274                         GTK_SIGNAL_FUNC(gtk_popup_hide_callback), (gpointer)this );
 275     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "show",
 276                         GTK_SIGNAL_FUNC(gtk_popup_show_callback), (gpointer)this );
 277
 278     gtk_signal_connect_after( GTK_OBJECT(combo->entry), "changed",
 279       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 280
 281     gtk_signal_connect_after( GTK_OBJECT(combo->list), "select-child",
 282       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 283
 284     SetInitialSize(size); // need this too because this is a wxControlWithItems
 285
 286     // This is required for tool bar support
 287 //    wxSize setsize = GetSize();
 288 //    gtk_widget_set_usize( m_widget, setsize.x, setsize.y );
 289
 290     return true;
 291 }
 292
 293 wxComboBox::~wxComboBox()
 294 {
 295     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 296     while (node)
 297     {
 298         wxClientData *cd = (wxClientData*)node->GetData();
 299         if (cd) delete cd;
 300         node = node->GetNext();
 301     }
 302     m_clientObjectList.Clear();
 303
 304     m_clientDataList.Clear();
 305 }
 306
 307 void wxComboBox::SetFocus()
 308 {
 309     if ( m_hasFocus )
 310     {
 311         // don't do anything if we already have focus
 312         return;
 313     }
 314
 315     gtk_widget_grab_focus( m_focusWidget );
 316 }
 317
 318 int wxComboBox::DoInsertItems(const wxArrayStringsAdapter& items,
 319                               unsigned int pos,
 320                               void **clientData,
 321                               wxClientDataType type)
 322 {
 323     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 324
 325     DisableEvents();
 326
 327     GtkWidget *list = GTK_COMBO(m_widget)->list;
 328
 329     GtkRcStyle *style = CreateWidgetStyle();
 330
 331     const unsigned int count = items.GetCount();
 332     for( unsigned int i = 0; i < count; ++i, ++pos )
 333     {
 334         GtkWidget *
 335             list_item = gtk_list_item_new_with_label( wxGTK_CONV( items[i] ) );
 336
 337         if ( pos == GetCount() )
 338         {
 339             gtk_container_add( GTK_CONTAINER(list), list_item );
 340         }
 341         else // insert, not append
 342         {
 343             GList *gitem_list = g_list_alloc ();
 344             gitem_list->data = list_item;
 345             gtk_list_insert_items( GTK_LIST (list), gitem_list, pos );
 346         }
 347
 348         if (GTK_WIDGET_REALIZED(m_widget))
 349         {
 350             gtk_widget_realize( list_item );
 351             gtk_widget_realize( GTK_BIN(list_item)->child );
 352
 353             if (style)
 354             {
 355                 gtk_widget_modify_style( GTK_WIDGET( list_item ), style );
 356                 GtkBin *bin = GTK_BIN( list_item );
 357                 GtkWidget *label = GTK_WIDGET( bin->child );
 358                 gtk_widget_modify_style( label, style );
 359             }
 360
 361         }
 362
 363         gtk_widget_show( list_item );
 364
 365         if ( m_clientDataList.GetCount() < GetCount() )
 366             m_clientDataList.Insert( pos, NULL );
 367         if ( m_clientObjectList.GetCount() < GetCount() )
 368             m_clientObjectList.Insert( pos, NULL );
 369
 370         AssignNewItemClientData(pos, clientData, i, type);
 371     }
 372
 373     if ( style )
 374         gtk_rc_style_unref( style );
 375
 376     EnableEvents();
 377
 378     InvalidateBestSize();
 379
 380     return pos - 1;
 381 }
 382
 383 void wxComboBox::DoSetItemClientData(unsigned int n, void* clientData)
 384 {
 385     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 386
 387     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 388     if (!node) return;
 389
 390     node->SetData( (wxObject*) clientData );
 391 }
 392
 393 void* wxComboBox::DoGetItemClientData(unsigned int n) const
 394 {
 395     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 396
 397     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 398
 399     return node ? node->GetData() : NULL;
 400 }
 401
 402 void wxComboBox::DoClear()
 403 {
 404     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 405
 406     DisableEvents();
 407
 408     GtkWidget *list = GTK_COMBO(m_widget)->list;
 409     gtk_list_clear_items( GTK_LIST(list), 0, (int)GetCount() );
 410
 411     m_clientObjectList.Clear();
 412
 413     m_clientDataList.Clear();
 414
 415     EnableEvents();
 416
 417     InvalidateBestSize();
 418 }
 419
 420 void wxComboBox::DoDeleteOneItem(unsigned int n)
 421 {
 422     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 423
 424     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 425
 426     GList *child = g_list_nth( listbox->children, n );
 427
 428     if (!child)
 429     {
 430         wxFAIL_MSG(wxT("wrong index"));
 431         return;
 432     }
 433
 434     DisableEvents();
 435
 436     GList *list = g_list_append( NULL, child->data );
 437     gtk_list_remove_items( listbox, list );
 438     g_list_free( list );
 439
 440     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 441     if (node)
 442     {
 443         m_clientObjectList.Erase( node );
 444     }
 445
 446     node = m_clientDataList.Item( n );
 447     if (node)
 448         m_clientDataList.Erase( node );
 449
 450     EnableEvents();
 451
 452     InvalidateBestSize();
 453 }
 454
 455 void wxComboBox::SetString(unsigned int n, const wxString &text)
 456 {
 457     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 458
 459     GtkWidget *list = GTK_COMBO(m_widget)->list;
 460
 461     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 462     if (child)
 463     {
 464         GtkBin *bin = GTK_BIN( child->data );
 465         GtkLabel *label = GTK_LABEL( bin->child );
 466         gtk_label_set_text(label, wxGTK_CONV(text));
 467     }
 468     else
 469     {
 470         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 471     }
 472
 473     InvalidateBestSize();
 474 }
 475
 476 int wxComboBox::FindString( const wxString &item, bool bCase ) const
 477 {
 478     wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid combobox") );
 479
 480     GtkWidget *list = GTK_COMBO(m_widget)->list;
 481
 482     GList *child = GTK_LIST(list)->children;
 483     int count = 0;
 484     while (child)
 485     {
 486         GtkBin *bin = GTK_BIN( child->data );
 487         GtkLabel *label = GTK_LABEL( bin->child );
 488         wxString str( label->label );
 489         if (item.IsSameAs( str , bCase ) )
 490             return count;
 491
 492         count++;
 493         child = child->next;
 494     }
 495
 496     return wxNOT_FOUND;
 497 }
 498
 499 int wxComboBox::GetSelection() const
 500 {
 501     // if the popup is currently opened, use the selection as it had been
 502     // before it dropped down
 503     return g_SelectionBeforePopup == wxID_NONE ? GetCurrentSelection()
 504                                                : g_SelectionBeforePopup;
 505 }
 506
 507 int wxComboBox::GetCurrentSelection() const
 508 {
 509     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 510
 511     GtkWidget *list = GTK_COMBO(m_widget)->list;
 512
 513     GList *selection = GTK_LIST(list)->selection;
 514     if (selection)
 515     {
 516         GList *child = GTK_LIST(list)->children;
 517         int count = 0;
 518         while (child)
 519         {
 520             if (child->data == selection->data) return count;
 521             count++;
 522             child = child->next;
 523         }
 524     }
 525
 526     return wxNOT_FOUND;
 527 }
 528
 529 wxString wxComboBox::GetString(unsigned int n) const
 530 {
 531     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 532
 533     GtkWidget *list = GTK_COMBO(m_widget)->list;
 534
 535     wxString str;
 536     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 537     if (child)
 538     {
 539         GtkBin *bin = GTK_BIN( child->data );
 540         GtkLabel *label = GTK_LABEL( bin->child );
 541         str = wxString( label->label );
 542     }
 543     else
 544     {
 545         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 546     }
 547
 548     return str;
 549 }
 550
 551 wxString wxComboBox::GetStringSelection() const
 552 {
 553     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 554
 555     GtkWidget *list = GTK_COMBO(m_widget)->list;
 556
 557     GList *selection = GTK_LIST(list)->selection;
 558     if (selection)
 559     {
 560         GtkBin *bin = GTK_BIN( selection->data );
 561         GtkLabel *label = GTK_LABEL( bin->child );
 562         wxString tmp( label->label );
 563         return tmp;
 564     }
 565
 566     wxFAIL_MSG( wxT("wxComboBox: no selection") );
 567
 568     return wxEmptyString;
 569 }
 570
 571 unsigned int wxComboBox::GetCount() const
 572 {
 573     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 574
 575     GtkWidget *list = GTK_COMBO(m_widget)->list;
 576
 577     GList *child = GTK_LIST(list)->children;
 578     unsigned int count = 0;
 579     while (child) { count++; child = child->next; }
 580     return count;
 581 }
 582
 583 void wxComboBox::SetSelection( int n )
 584 {
 585     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 586
 587     DisableEvents();
 588
 589     GtkWidget *list = GTK_COMBO(m_widget)->list;
 590     gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 591     gtk_list_select_item( GTK_LIST(list), n );
 592     m_prevSelection = n;
 593
 594     EnableEvents();
 595 }
 596
 597 wxString wxComboBox::DoGetValue() const
 598 {
 599     GtkEntry *entry = GTK_ENTRY( GTK_COMBO(m_widget)->entry );
 600     wxString tmp( wxGTK_CONV_BACK( gtk_entry_get_text( entry ) ) );
 601
 602 #if 0
 603     for (int i = 0; i < wxStrlen(tmp.c_str()) +1; i++)
 604     {
 605         wxChar c = tmp[i];
 606         printf( "%d ", (int) (c) );
 607     }
 608     printf( "\n" );
 609 #endif
 610
 611     return tmp;
 612 }
 613
 614 void wxComboBox::SetValue( const wxString& value )
 615 {
 616     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 617
 618     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 619     gtk_entry_set_text( GTK_ENTRY(entry), wxGTK_CONV( value ) );
 620
 621     InvalidateBestSize();
 622 }
 623
 624 void wxComboBox::WriteText(const wxString& value)
 625 {
 626     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 627
 628     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 629     GtkEditable * const edit = GTK_EDITABLE(entry);
 630
 631     gtk_editable_delete_selection(edit);
 632     gint len = gtk_editable_get_position(edit);
 633     gtk_editable_insert_text(edit, wxGTK_CONV(value), -1, &len);
 634     gtk_editable_set_position(edit, len);
 635 }
 636
 637 void wxComboBox::Copy()
 638 {
 639     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 640
 641     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 642     gtk_editable_copy_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 643 }
 644
 645 void wxComboBox::Cut()
 646 {
 647     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 648
 649     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 650     gtk_editable_cut_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 651 }
 652
 653 void wxComboBox::Paste()
 654 {
 655     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 656
 657     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 658     gtk_editable_paste_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG);
 659 }
 660
 661 void wxComboBox::Undo()
 662 {
 663     // TODO
 664 }
 665
 666 void wxComboBox::Redo()
 667 {
 668     // TODO
 669 }
 670
 671 void wxComboBox::SelectAll()
 672 {
 673     SetSelection(0, GetLastPosition());
 674 }
 675
 676 bool wxComboBox::CanUndo() const
 677 {
 678     // TODO
 679     return false;
 680 }
 681
 682 bool wxComboBox::CanRedo() const
 683 {
 684     // TODO
 685     return false;
 686 }
 687
 688 bool wxComboBox::HasSelection() const
 689 {
 690     long from, to;
 691     GetSelection(&from, &to);
 692     return from != to;
 693 }
 694
 695 bool wxComboBox::CanCopy() const
 696 {
 697     // Can copy if there's a selection
 698     return HasSelection();
 699 }
 700
 701 bool wxComboBox::CanCut() const
 702 {
 703     return CanCopy() && IsEditable();
 704 }
 705
 706 bool wxComboBox::CanPaste() const
 707 {
 708     // TODO: check for text on the clipboard
 709     return IsEditable() ;
 710 }
 711
 712 bool wxComboBox::IsEditable() const
 713 {
 714     return !HasFlag(wxCB_READONLY);
 715 }
 716
 717
 718 void wxComboBox::SetInsertionPoint( long pos )
 719 {
 720     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 721
 722     if ( pos == GetLastPosition() )
 723         pos = -1;
 724
 725     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 726     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
 727 }
 728
 729 long wxComboBox::GetInsertionPoint() const
 730 {
 731     return (long) GET_EDITABLE_POS( GTK_COMBO(m_widget)->entry );
 732 }
 733
 734 wxTextPos wxComboBox::GetLastPosition() const
 735 {
 736     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 737     int pos = GTK_ENTRY(entry)->text_length;
 738     return (long) pos-1;
 739 }
 740
 741 void wxComboBox::Replace( long from, long to, const wxString& value )
 742 {
 743     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 744
 745     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 746     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 747     if ( value.empty() ) return;
 748     gint pos = (gint)to;
 749
 750 #if wxUSE_UNICODE
 751     wxCharBuffer buffer = wxConvUTF8.cWX2MB( value );
 752     gtk_editable_insert_text( GTK_EDITABLE(entry), (const char*) buffer, strlen( (const char*) buffer ), &pos );
 753 #else
 754     gtk_editable_insert_text( GTK_EDITABLE(entry), value.c_str(), value.length(), &pos );
 755 #endif
 756 }
 757
 758 void wxComboBox::SetSelection( long from, long to )
 759 {
 760     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 761     gtk_editable_select_region( GTK_EDITABLE(entry), (gint)from, (gint)to );
 762 }
 763
 764 void wxComboBox::GetSelection( long* from, long* to ) const
 765 {
 766     if (IsEditable())
 767     {
 768         GtkEditable *editable = GTK_EDITABLE(GTK_COMBO(m_widget)->entry);
 769         *from = (long) editable->selection_start_pos;
 770         *to = (long) editable->selection_end_pos;
 771     }
 772 }
 773
 774 void wxComboBox::SetEditable( bool editable )
 775 {
 776     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 777     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 778 }
 779
 780 void wxComboBox::OnChar( wxKeyEvent &event )
 781 {
 782     if ( event.GetKeyCode() == WXK_RETURN )
 783     {
 784         // GTK automatically selects an item if its in the list
 785         wxCommandEvent eventEnter(wxEVT_TEXT_ENTER, GetId());
 786         eventEnter.SetString( GetValue() );
 787         eventEnter.SetInt( GetSelection() );
 788         eventEnter.SetEventObject( this );
 789
 790         if (!HandleWindowEvent( eventEnter ))
 791         {
 792             // This will invoke the dialog default action, such
 793             // as the clicking the default button.
 794
 795             wxWindow *top_frame = m_parent;
 796             while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 797                 top_frame = top_frame->GetParent();
 798
 799             if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 800             {
 801                 GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 802
 803                 if (window->default_widget)
 804                         gtk_widget_activate (window->default_widget);
 805             }
 806         }
 807
 808         // Catch GTK event so that GTK doesn't open the drop
 809         // down list upon RETURN.
 810         return;
 811     }
 812
 813     event.Skip();
 814 }
 815
 816 void wxComboBox::DisableEvents()
 817 {
 818     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->list),
 819       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 820     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->entry),
 821       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 822 }
 823
 824 void wxComboBox::EnableEvents()
 825 {
 826     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(m_widget)->list), "select-child",
 827       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 828     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
 829       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 830 }
 831
 832 void wxComboBox::OnSize( wxSizeEvent &event )
 833 {
 834     // NB: In some situations (e.g. on non-first page of a wizard, if the
 835     //     size used is default size), GtkCombo widget is resized correctly,
 836     //     but it's look is not updated, it's rendered as if it was much wider.
 837     //     No other widgets are affected, so it looks like a bug in GTK+.
 838     //     Manually requesting resize calculation (as gtk_pizza_set_size does)
 839     //     fixes it.
 840     if (GTK_WIDGET_VISIBLE(m_widget))
 841         gtk_widget_queue_resize(m_widget);
 842
 843     event.Skip();
 844 }
 845
 846 void wxComboBox::DoApplyWidgetStyle(GtkRcStyle *style)
 847 {
 848 //    gtk_widget_modify_style( GTK_COMBO(m_widget)->button, syle );
 849
 850     gtk_widget_modify_style( GTK_COMBO(m_widget)->entry, style );
 851     gtk_widget_modify_style( GTK_COMBO(m_widget)->list, style );
 852
 853     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 854     GList *child = list->children;
 855     while (child)
 856     {
 857         gtk_widget_modify_style( GTK_WIDGET(child->data), style );
 858
 859         GtkBin *bin = GTK_BIN(child->data);
 860         gtk_widget_modify_style( bin->child, style );
 861
 862         child = child->next;
 863     }
 864 }
 865
 866 GtkWidget* wxComboBox::GetConnectWidget()
 867 {
 868     return GTK_COMBO(m_widget)->entry;
 869 }
 870
 871 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 872 {
 873     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 874              (window == GTK_COMBO(m_widget)->button->window ) );
 875 }
 876
 877 wxSize wxComboBox::DoGetBestSize() const
 878 {
 879     wxSize ret( wxControl::DoGetBestSize() );
 880
 881     // we know better our horizontal extent: it depends on the longest string
 882     // in the combobox
 883     if ( m_widget )
 884     {
 885         int width;
 886         unsigned int count = GetCount();
 887         for ( unsigned int n = 0; n < count; n++ )
 888         {
 889             GetTextExtent(GetString(n), &width, NULL, NULL, NULL );
 890             if ( width > ret.x )
 891                 ret.x = width;
 892         }
 893     }
 894
 895     // empty combobox should have some reasonable default size too
 896     if ( ret.x < 100 )
 897         ret.x = 100;
 898
 899     CacheBestSize(ret);
 900     return ret;
 901 }
 902
 903 // static
 904 wxVisualAttributes
 905 wxComboBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 906 {
 907     return GetDefaultAttributesFromGTKWidget(gtk_combo_new, true);
 908 }
 909
 910 // ----------------------------------------------------------------------------
 911 // standard event handling
 912 // ----------------------------------------------------------------------------
 913
 914 void wxComboBox::OnCut(wxCommandEvent& WXUNUSED(event))
 915 {
 916     Cut();
 917 }
 918
 919 void wxComboBox::OnCopy(wxCommandEvent& WXUNUSED(event))
 920 {
 921     Copy();
 922 }
 923
 924 void wxComboBox::OnPaste(wxCommandEvent& WXUNUSED(event))
 925 {
 926     Paste();
 927 }
 928
 929 void wxComboBox::OnUndo(wxCommandEvent& WXUNUSED(event))
 930 {
 931     Undo();
 932 }
 933
 934 void wxComboBox::OnRedo(wxCommandEvent& WXUNUSED(event))
 935 {
 936     Redo();
 937 }
 938
 939 void wxComboBox::OnDelete(wxCommandEvent& WXUNUSED(event))
 940 {
 941     long from, to;
 942     GetSelection(& from, & to);
 943     if (from != -1 && to != -1)
 944         Remove(from, to);
 945 }
 946
 947 void wxComboBox::OnSelectAll(wxCommandEvent& WXUNUSED(event))
 948 {
 949     SetSelection(-1, -1);
 950 }
 951
 952 void wxComboBox::OnUpdateCut(wxUpdateUIEvent& event)
 953 {
 954     event.Enable( CanCut() );
 955 }
 956
 957 void wxComboBox::OnUpdateCopy(wxUpdateUIEvent& event)
 958 {
 959     event.Enable( CanCopy() );
 960 }
 961
 962 void wxComboBox::OnUpdatePaste(wxUpdateUIEvent& event)
 963 {
 964     event.Enable( CanPaste() );
 965 }
 966
 967 void wxComboBox::OnUpdateUndo(wxUpdateUIEvent& event)
 968 {
 969     event.Enable( CanUndo() );
 970 }
 971
 972 void wxComboBox::OnUpdateRedo(wxUpdateUIEvent& event)
 973 {
 974     event.Enable( CanRedo() );
 975 }
 976
 977 void wxComboBox::OnUpdateDelete(wxUpdateUIEvent& event)
 978 {
 979     event.Enable(HasSelection() && IsEditable()) ;
 980 }
 981
 982 void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event)
 983 {
 984     event.Enable(GetLastPosition() > 0);
 985 }
 986
 987 #endif