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_COMMAND_TEXT_UPDATED
  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_COMMAND_TEXT_UPDATED, 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_COMMAND_COMBOBOX_SELECTED, 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_COMMAND_TEXT_UPDATED, 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_COMMAND_COMBOBOX_SELECTED, 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_COMMAND_TEXT_UPDATED, 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 IMPLEMENT_DYNAMIC_CLASS(wxComboBox,wxControl)
 174
 175 BEGIN_EVENT_TABLE(wxComboBox, wxControl)
 176     EVT_SIZE(wxComboBox::OnSize)
 177     EVT_CHAR(wxComboBox::OnChar)
 178
 179     EVT_MENU(wxID_CUT, wxComboBox::OnCut)
 180     EVT_MENU(wxID_COPY, wxComboBox::OnCopy)
 181     EVT_MENU(wxID_PASTE, wxComboBox::OnPaste)
 182     EVT_MENU(wxID_UNDO, wxComboBox::OnUndo)
 183     EVT_MENU(wxID_REDO, wxComboBox::OnRedo)
 184     EVT_MENU(wxID_CLEAR, wxComboBox::OnDelete)
 185     EVT_MENU(wxID_SELECTALL, wxComboBox::OnSelectAll)
 186
 187     EVT_UPDATE_UI(wxID_CUT, wxComboBox::OnUpdateCut)
 188     EVT_UPDATE_UI(wxID_COPY, wxComboBox::OnUpdateCopy)
 189     EVT_UPDATE_UI(wxID_PASTE, wxComboBox::OnUpdatePaste)
 190     EVT_UPDATE_UI(wxID_UNDO, wxComboBox::OnUpdateUndo)
 191     EVT_UPDATE_UI(wxID_REDO, wxComboBox::OnUpdateRedo)
 192     EVT_UPDATE_UI(wxID_CLEAR, wxComboBox::OnUpdateDelete)
 193     EVT_UPDATE_UI(wxID_SELECTALL, wxComboBox::OnUpdateSelectAll)
 194 END_EVENT_TABLE()
 195
 196 bool wxComboBox::Create( wxWindow *parent, wxWindowID id,
 197                          const wxString& value,
 198                          const wxPoint& pos, const wxSize& size,
 199                          const wxArrayString& choices,
 200                          long style, const wxValidator& validator,
 201                          const wxString& name )
 202 {
 203     wxCArrayString chs(choices);
 204
 205     return Create( parent, id, value, pos, size, chs.GetCount(),
 206                    chs.GetStrings(), style, validator, name );
 207 }
 208
 209 bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
 210                          const wxPoint& pos, const wxSize& size,
 211                          int n, const wxString choices[],
 212                          long style, const wxValidator& validator,
 213                          const wxString& name )
 214 {
 215     m_ignoreNextUpdate = false;
 216     m_needParent = true;
 217     m_acceptsFocus = true;
 218     m_prevSelection = 0;
 219
 220     if (!PreCreation( parent, pos, size ) ||
 221         !CreateBase( parent, id, pos, size, style, validator, name ))
 222     {
 223         wxFAIL_MSG( wxT("wxComboBox creation failed") );
 224         return false;
 225     }
 226
 227     m_widget = gtk_combo_new();
 228     GtkCombo *combo = GTK_COMBO(m_widget);
 229
 230     // Disable GTK's broken events ...
 231     gtk_signal_disconnect( GTK_OBJECT(combo->entry), combo->entry_change_id );
 232     // ... and add surrogate handler.
 233     combo->entry_change_id = gtk_signal_connect (GTK_OBJECT (combo->entry), "changed",
 234                   (GtkSignalFunc) gtk_dummy_callback, combo);
 235
 236     // make it more useable
 237     gtk_combo_set_use_arrows_always( GTK_COMBO(m_widget), TRUE );
 238
 239     // and case-sensitive
 240     gtk_combo_set_case_sensitive( GTK_COMBO(m_widget), TRUE );
 241
 242     GtkWidget *list = GTK_COMBO(m_widget)->list;
 243
 244     // gtk_list_set_selection_mode( GTK_LIST(list), GTK_SELECTION_MULTIPLE );
 245
 246     for (int i = 0; i < n; i++)
 247     {
 248         GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( choices[i] ) );
 249
 250         m_clientDataList.Append( (wxObject*)NULL );
 251         m_clientObjectList.Append( (wxObject*)NULL );
 252
 253         gtk_container_add( GTK_CONTAINER(list), list_item );
 254
 255         gtk_widget_show( list_item );
 256     }
 257
 258     m_parent->DoAddChild( this );
 259
 260     m_focusWidget = combo->entry;
 261
 262     PostCreation(size);
 263
 264     ConnectWidget( combo->button );
 265
 266     // MSW's combo box shows the value and the selection is -1
 267     gtk_entry_set_text( GTK_ENTRY(combo->entry), wxGTK_CONV(value) );
 268     gtk_list_unselect_all( GTK_LIST(combo->list) );
 269
 270     if (style & wxCB_READONLY)
 271         gtk_entry_set_editable( GTK_ENTRY( combo->entry ), FALSE );
 272
 273     // "show" and "hide" events are generated when user click on the combobox button which popups a list
 274     // this list is the "popwin" gtk widget
 275     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "hide",
 276                         GTK_SIGNAL_FUNC(gtk_popup_hide_callback), (gpointer)this );
 277     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "show",
 278                         GTK_SIGNAL_FUNC(gtk_popup_show_callback), (gpointer)this );
 279
 280     gtk_signal_connect_after( GTK_OBJECT(combo->entry), "changed",
 281       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 282
 283     gtk_signal_connect_after( GTK_OBJECT(combo->list), "select-child",
 284       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 285
 286     SetInitialSize(size); // need this too because this is a wxControlWithItems
 287
 288     // This is required for tool bar support
 289 //    wxSize setsize = GetSize();
 290 //    gtk_widget_set_usize( m_widget, setsize.x, setsize.y );
 291
 292     return true;
 293 }
 294
 295 wxComboBox::~wxComboBox()
 296 {
 297     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 298     while (node)
 299     {
 300         wxClientData *cd = (wxClientData*)node->GetData();
 301         if (cd) delete cd;
 302         node = node->GetNext();
 303     }
 304     m_clientObjectList.Clear();
 305
 306     m_clientDataList.Clear();
 307 }
 308
 309 void wxComboBox::SetFocus()
 310 {
 311     if ( m_hasFocus )
 312     {
 313         // don't do anything if we already have focus
 314         return;
 315     }
 316
 317     gtk_widget_grab_focus( m_focusWidget );
 318 }
 319
 320 int wxComboBox::DoInsertItems(const wxArrayStringsAdapter& items,
 321                               unsigned int pos,
 322                               void **clientData,
 323                               wxClientDataType type)
 324 {
 325     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 326
 327     DisableEvents();
 328
 329     GtkWidget *list = GTK_COMBO(m_widget)->list;
 330
 331     GtkRcStyle *style = CreateWidgetStyle();
 332
 333     const unsigned int count = items.GetCount();
 334     for( unsigned int i = 0; i < count; ++i, ++pos )
 335     {
 336         GtkWidget *
 337             list_item = gtk_list_item_new_with_label( wxGTK_CONV( items[i] ) );
 338
 339         if ( pos == GetCount() )
 340         {
 341             gtk_container_add( GTK_CONTAINER(list), list_item );
 342         }
 343         else // insert, not append
 344         {
 345             GList *gitem_list = g_list_alloc ();
 346             gitem_list->data = list_item;
 347             gtk_list_insert_items( GTK_LIST (list), gitem_list, pos );
 348         }
 349
 350         if (GTK_WIDGET_REALIZED(m_widget))
 351         {
 352             gtk_widget_realize( list_item );
 353             gtk_widget_realize( GTK_BIN(list_item)->child );
 354
 355             if (style)
 356             {
 357                 gtk_widget_modify_style( GTK_WIDGET( list_item ), style );
 358                 GtkBin *bin = GTK_BIN( list_item );
 359                 GtkWidget *label = GTK_WIDGET( bin->child );
 360                 gtk_widget_modify_style( label, style );
 361             }
 362
 363         }
 364
 365         gtk_widget_show( list_item );
 366
 367         if ( m_clientDataList.GetCount() < GetCount() )
 368             m_clientDataList.Insert( pos, (wxObject*) NULL );
 369         if ( m_clientObjectList.GetCount() < GetCount() )
 370             m_clientObjectList.Insert( pos, (wxObject*) NULL );
 371
 372         AssignNewItemClientData(pos, clientData, i, type);
 373     }
 374
 375     if ( style )
 376         gtk_rc_style_unref( style );
 377
 378     EnableEvents();
 379
 380     InvalidateBestSize();
 381
 382     return pos - 1;
 383 }
 384
 385 void wxComboBox::DoSetItemClientData(unsigned int n, void* clientData)
 386 {
 387     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 388
 389     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 390     if (!node) return;
 391
 392     node->SetData( (wxObject*) clientData );
 393 }
 394
 395 void* wxComboBox::DoGetItemClientData(unsigned int n) const
 396 {
 397     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 398
 399     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 400
 401     return node ? node->GetData() : NULL;
 402 }
 403
 404 void wxComboBox::DoClear()
 405 {
 406     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 407
 408     DisableEvents();
 409
 410     GtkWidget *list = GTK_COMBO(m_widget)->list;
 411     gtk_list_clear_items( GTK_LIST(list), 0, (int)GetCount() );
 412
 413     m_clientObjectList.Clear();
 414
 415     m_clientDataList.Clear();
 416
 417     EnableEvents();
 418
 419     InvalidateBestSize();
 420 }
 421
 422 void wxComboBox::DoDeleteOneItem(unsigned int n)
 423 {
 424     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 425
 426     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 427
 428     GList *child = g_list_nth( listbox->children, n );
 429
 430     if (!child)
 431     {
 432         wxFAIL_MSG(wxT("wrong index"));
 433         return;
 434     }
 435
 436     DisableEvents();
 437
 438     GList *list = g_list_append( (GList*) NULL, child->data );
 439     gtk_list_remove_items( listbox, list );
 440     g_list_free( list );
 441
 442     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 443     if (node)
 444     {
 445         m_clientObjectList.Erase( node );
 446     }
 447
 448     node = m_clientDataList.Item( n );
 449     if (node)
 450         m_clientDataList.Erase( node );
 451
 452     EnableEvents();
 453
 454     InvalidateBestSize();
 455 }
 456
 457 void wxComboBox::SetString(unsigned int n, const wxString &text)
 458 {
 459     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 460
 461     GtkWidget *list = GTK_COMBO(m_widget)->list;
 462
 463     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 464     if (child)
 465     {
 466         GtkBin *bin = GTK_BIN( child->data );
 467         GtkLabel *label = GTK_LABEL( bin->child );
 468         gtk_label_set_text(label, wxGTK_CONV(text));
 469     }
 470     else
 471     {
 472         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 473     }
 474
 475     InvalidateBestSize();
 476 }
 477
 478 int wxComboBox::FindString( const wxString &item, bool bCase ) const
 479 {
 480     wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid combobox") );
 481
 482     GtkWidget *list = GTK_COMBO(m_widget)->list;
 483
 484     GList *child = GTK_LIST(list)->children;
 485     int count = 0;
 486     while (child)
 487     {
 488         GtkBin *bin = GTK_BIN( child->data );
 489         GtkLabel *label = GTK_LABEL( bin->child );
 490         wxString str( label->label );
 491         if (item.IsSameAs( str , bCase ) )
 492             return count;
 493
 494         count++;
 495         child = child->next;
 496     }
 497
 498     return wxNOT_FOUND;
 499 }
 500
 501 int wxComboBox::GetSelection() const
 502 {
 503     // if the popup is currently opened, use the selection as it had been
 504     // before it dropped down
 505     return g_SelectionBeforePopup == wxID_NONE ? GetCurrentSelection()
 506                                                : g_SelectionBeforePopup;
 507 }
 508
 509 int wxComboBox::GetCurrentSelection() const
 510 {
 511     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 512
 513     GtkWidget *list = GTK_COMBO(m_widget)->list;
 514
 515     GList *selection = GTK_LIST(list)->selection;
 516     if (selection)
 517     {
 518         GList *child = GTK_LIST(list)->children;
 519         int count = 0;
 520         while (child)
 521         {
 522             if (child->data == selection->data) return count;
 523             count++;
 524             child = child->next;
 525         }
 526     }
 527
 528     return wxNOT_FOUND;
 529 }
 530
 531 wxString wxComboBox::GetString(unsigned int n) const
 532 {
 533     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 534
 535     GtkWidget *list = GTK_COMBO(m_widget)->list;
 536
 537     wxString str;
 538     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 539     if (child)
 540     {
 541         GtkBin *bin = GTK_BIN( child->data );
 542         GtkLabel *label = GTK_LABEL( bin->child );
 543         str = wxString( label->label );
 544     }
 545     else
 546     {
 547         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 548     }
 549
 550     return str;
 551 }
 552
 553 wxString wxComboBox::GetStringSelection() const
 554 {
 555     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 556
 557     GtkWidget *list = GTK_COMBO(m_widget)->list;
 558
 559     GList *selection = GTK_LIST(list)->selection;
 560     if (selection)
 561     {
 562         GtkBin *bin = GTK_BIN( selection->data );
 563         GtkLabel *label = GTK_LABEL( bin->child );
 564         wxString tmp( label->label );
 565         return tmp;
 566     }
 567
 568     wxFAIL_MSG( wxT("wxComboBox: no selection") );
 569
 570     return wxEmptyString;
 571 }
 572
 573 unsigned int wxComboBox::GetCount() const
 574 {
 575     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 576
 577     GtkWidget *list = GTK_COMBO(m_widget)->list;
 578
 579     GList *child = GTK_LIST(list)->children;
 580     unsigned int count = 0;
 581     while (child) { count++; child = child->next; }
 582     return count;
 583 }
 584
 585 void wxComboBox::SetSelection( int n )
 586 {
 587     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 588
 589     DisableEvents();
 590
 591     GtkWidget *list = GTK_COMBO(m_widget)->list;
 592     gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 593     gtk_list_select_item( GTK_LIST(list), n );
 594     m_prevSelection = n;
 595
 596     EnableEvents();
 597 }
 598
 599 wxString wxComboBox::GetValue() const
 600 {
 601     GtkEntry *entry = GTK_ENTRY( GTK_COMBO(m_widget)->entry );
 602     wxString tmp( wxGTK_CONV_BACK( gtk_entry_get_text( entry ) ) );
 603
 604 #if 0
 605     for (int i = 0; i < wxStrlen(tmp.c_str()) +1; i++)
 606     {
 607         wxChar c = tmp[i];
 608         printf( "%d ", (int) (c) );
 609     }
 610     printf( "\n" );
 611 #endif
 612
 613     return tmp;
 614 }
 615
 616 void wxComboBox::SetValue( const wxString& value )
 617 {
 618     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 619
 620     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 621     gtk_entry_set_text( GTK_ENTRY(entry), wxGTK_CONV( value ) );
 622
 623     InvalidateBestSize();
 624 }
 625
 626 void wxComboBox::WriteText(const wxString& value)
 627 {
 628     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 629
 630     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 631     GtkEditable * const edit = GTK_EDITABLE(entry);
 632
 633     gtk_editable_delete_selection(edit);
 634     gint len = gtk_editable_get_position(edit);
 635     gtk_editable_insert_text(edit, wxGTK_CONV(value), -1, &len);
 636     gtk_editable_set_position(edit, len);
 637 }
 638
 639 void wxComboBox::Copy()
 640 {
 641     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 642
 643     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 644     gtk_editable_copy_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 645 }
 646
 647 void wxComboBox::Cut()
 648 {
 649     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 650
 651     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 652     gtk_editable_cut_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 653 }
 654
 655 void wxComboBox::Paste()
 656 {
 657     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 658
 659     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 660     gtk_editable_paste_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG);
 661 }
 662
 663 void wxComboBox::Undo()
 664 {
 665     // TODO
 666 }
 667
 668 void wxComboBox::Redo()
 669 {
 670     // TODO
 671 }
 672
 673 void wxComboBox::SelectAll()
 674 {
 675     SetSelection(0, GetLastPosition());
 676 }
 677
 678 bool wxComboBox::CanUndo() const
 679 {
 680     // TODO
 681     return false;
 682 }
 683
 684 bool wxComboBox::CanRedo() const
 685 {
 686     // TODO
 687     return false;
 688 }
 689
 690 bool wxComboBox::HasSelection() const
 691 {
 692     long from, to;
 693     GetSelection(&from, &to);
 694     return from != to;
 695 }
 696
 697 bool wxComboBox::CanCopy() const
 698 {
 699     // Can copy if there's a selection
 700     return HasSelection();
 701 }
 702
 703 bool wxComboBox::CanCut() const
 704 {
 705     return CanCopy() && IsEditable();
 706 }
 707
 708 bool wxComboBox::CanPaste() const
 709 {
 710     // TODO: check for text on the clipboard
 711     return IsEditable() ;
 712 }
 713
 714 bool wxComboBox::IsEditable() const
 715 {
 716     return !HasFlag(wxCB_READONLY);
 717 }
 718
 719
 720 void wxComboBox::SetInsertionPoint( long pos )
 721 {
 722     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 723
 724     if ( pos == GetLastPosition() )
 725         pos = -1;
 726
 727     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 728     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
 729 }
 730
 731 long wxComboBox::GetInsertionPoint() const
 732 {
 733     return (long) GET_EDITABLE_POS( GTK_COMBO(m_widget)->entry );
 734 }
 735
 736 wxTextPos wxComboBox::GetLastPosition() const
 737 {
 738     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 739     int pos = GTK_ENTRY(entry)->text_length;
 740     return (long) pos-1;
 741 }
 742
 743 void wxComboBox::Replace( long from, long to, const wxString& value )
 744 {
 745     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 746
 747     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 748     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 749     if (value.IsNull()) return;
 750     gint pos = (gint)to;
 751
 752 #if wxUSE_UNICODE
 753     wxCharBuffer buffer = wxConvUTF8.cWX2MB( value );
 754     gtk_editable_insert_text( GTK_EDITABLE(entry), (const char*) buffer, strlen( (const char*) buffer ), &pos );
 755 #else
 756     gtk_editable_insert_text( GTK_EDITABLE(entry), value.c_str(), value.length(), &pos );
 757 #endif
 758 }
 759
 760 void wxComboBox::SetSelection( long from, long to )
 761 {
 762     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 763     gtk_editable_select_region( GTK_EDITABLE(entry), (gint)from, (gint)to );
 764 }
 765
 766 void wxComboBox::GetSelection( long* from, long* to ) const
 767 {
 768     if (IsEditable())
 769     {
 770         GtkEditable *editable = GTK_EDITABLE(GTK_COMBO(m_widget)->entry);
 771         *from = (long) editable->selection_start_pos;
 772         *to = (long) editable->selection_end_pos;
 773     }
 774 }
 775
 776 void wxComboBox::SetEditable( bool editable )
 777 {
 778     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 779     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 780 }
 781
 782 void wxComboBox::OnChar( wxKeyEvent &event )
 783 {
 784     if ( event.GetKeyCode() == WXK_RETURN )
 785     {
 786         // GTK automatically selects an item if its in the list
 787         wxCommandEvent eventEnter(wxEVT_COMMAND_TEXT_ENTER, GetId());
 788         eventEnter.SetString( GetValue() );
 789         eventEnter.SetInt( GetSelection() );
 790         eventEnter.SetEventObject( this );
 791
 792         if (!HandleWindowEvent( eventEnter ))
 793         {
 794             // This will invoke the dialog default action, such
 795             // as the clicking the default button.
 796
 797             wxWindow *top_frame = m_parent;
 798             while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 799                 top_frame = top_frame->GetParent();
 800
 801             if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 802             {
 803                 GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 804
 805                 if (window->default_widget)
 806                         gtk_widget_activate (window->default_widget);
 807             }
 808         }
 809
 810         // Catch GTK event so that GTK doesn't open the drop
 811         // down list upon RETURN.
 812         return;
 813     }
 814
 815     event.Skip();
 816 }
 817
 818 void wxComboBox::DisableEvents()
 819 {
 820     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->list),
 821       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 822     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->entry),
 823       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 824 }
 825
 826 void wxComboBox::EnableEvents()
 827 {
 828     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(m_widget)->list), "select-child",
 829       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 830     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
 831       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 832 }
 833
 834 void wxComboBox::OnSize( wxSizeEvent &event )
 835 {
 836     // NB: In some situations (e.g. on non-first page of a wizard, if the
 837     //     size used is default size), GtkCombo widget is resized correctly,
 838     //     but it's look is not updated, it's rendered as if it was much wider.
 839     //     No other widgets are affected, so it looks like a bug in GTK+.
 840     //     Manually requesting resize calculation (as gtk_pizza_set_size does)
 841     //     fixes it.
 842     if (GTK_WIDGET_VISIBLE(m_widget))
 843         gtk_widget_queue_resize(m_widget);
 844
 845     event.Skip();
 846 }
 847
 848 void wxComboBox::DoApplyWidgetStyle(GtkRcStyle *style)
 849 {
 850 //    gtk_widget_modify_style( GTK_COMBO(m_widget)->button, syle );
 851
 852     gtk_widget_modify_style( GTK_COMBO(m_widget)->entry, style );
 853     gtk_widget_modify_style( GTK_COMBO(m_widget)->list, style );
 854
 855     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 856     GList *child = list->children;
 857     while (child)
 858     {
 859         gtk_widget_modify_style( GTK_WIDGET(child->data), style );
 860
 861         GtkBin *bin = GTK_BIN(child->data);
 862         gtk_widget_modify_style( bin->child, style );
 863
 864         child = child->next;
 865     }
 866 }
 867
 868 GtkWidget* wxComboBox::GetConnectWidget()
 869 {
 870     return GTK_COMBO(m_widget)->entry;
 871 }
 872
 873 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 874 {
 875     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 876              (window == GTK_COMBO(m_widget)->button->window ) );
 877 }
 878
 879 wxSize wxComboBox::DoGetBestSize() const
 880 {
 881     wxSize ret( wxControl::DoGetBestSize() );
 882
 883     // we know better our horizontal extent: it depends on the longest string
 884     // in the combobox
 885     if ( m_widget )
 886     {
 887         int width;
 888         unsigned int count = GetCount();
 889         for ( unsigned int n = 0; n < count; n++ )
 890         {
 891             GetTextExtent(GetString(n), &width, NULL, NULL, NULL );
 892             if ( width > ret.x )
 893                 ret.x = width;
 894         }
 895     }
 896
 897     // empty combobox should have some reasonable default size too
 898     if ( ret.x < 100 )
 899         ret.x = 100;
 900
 901     CacheBestSize(ret);
 902     return ret;
 903 }
 904
 905 // static
 906 wxVisualAttributes
 907 wxComboBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 908 {
 909     return GetDefaultAttributesFromGTKWidget(gtk_combo_new, true);
 910 }
 911
 912 // ----------------------------------------------------------------------------
 913 // standard event handling
 914 // ----------------------------------------------------------------------------
 915
 916 void wxComboBox::OnCut(wxCommandEvent& WXUNUSED(event))
 917 {
 918     Cut();
 919 }
 920
 921 void wxComboBox::OnCopy(wxCommandEvent& WXUNUSED(event))
 922 {
 923     Copy();
 924 }
 925
 926 void wxComboBox::OnPaste(wxCommandEvent& WXUNUSED(event))
 927 {
 928     Paste();
 929 }
 930
 931 void wxComboBox::OnUndo(wxCommandEvent& WXUNUSED(event))
 932 {
 933     Undo();
 934 }
 935
 936 void wxComboBox::OnRedo(wxCommandEvent& WXUNUSED(event))
 937 {
 938     Redo();
 939 }
 940
 941 void wxComboBox::OnDelete(wxCommandEvent& WXUNUSED(event))
 942 {
 943     long from, to;
 944     GetSelection(& from, & to);
 945     if (from != -1 && to != -1)
 946         Remove(from, to);
 947 }
 948
 949 void wxComboBox::OnSelectAll(wxCommandEvent& WXUNUSED(event))
 950 {
 951     SetSelection(-1, -1);
 952 }
 953
 954 void wxComboBox::OnUpdateCut(wxUpdateUIEvent& event)
 955 {
 956     event.Enable( CanCut() );
 957 }
 958
 959 void wxComboBox::OnUpdateCopy(wxUpdateUIEvent& event)
 960 {
 961     event.Enable( CanCopy() );
 962 }
 963
 964 void wxComboBox::OnUpdatePaste(wxUpdateUIEvent& event)
 965 {
 966     event.Enable( CanPaste() );
 967 }
 968
 969 void wxComboBox::OnUpdateUndo(wxUpdateUIEvent& event)
 970 {
 971     event.Enable( CanUndo() );
 972 }
 973
 974 void wxComboBox::OnUpdateRedo(wxUpdateUIEvent& event)
 975 {
 976     event.Enable( CanRedo() );
 977 }
 978
 979 void wxComboBox::OnUpdateDelete(wxUpdateUIEvent& event)
 980 {
 981     event.Enable(HasSelection() && IsEditable()) ;
 982 }
 983
 984 void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event)
 985 {
 986     event.Enable(GetLastPosition() > 0);
 987 }
 988
 989 #endif