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 #include "wx/combobox.h"
  14
  15 #if wxUSE_COMBOBOX
  16
  17 #include "wx/settings.h"
  18 #include "wx/arrstr.h"
  19 #include "wx/intl.h"
  20
  21 #include "wx/textctrl.h"    // for wxEVT_COMMAND_TEXT_UPDATED
  22
  23 #include "wx/gtk/private.h"
  24
  25 //-----------------------------------------------------------------------------
  26 // idle system
  27 //-----------------------------------------------------------------------------
  28
  29 extern void wxapp_install_idle_handler();
  30 extern bool g_isIdle;
  31
  32 //-----------------------------------------------------------------------------
  33 // data
  34 //-----------------------------------------------------------------------------
  35
  36 extern bool   g_blockEventsOnDrag;
  37 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 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  47 {
  48     if (g_isIdle) wxapp_install_idle_handler();
  49
  50     if (combo->m_ignoreNextUpdate)
  51     {
  52         combo->m_ignoreNextUpdate = false;
  53         return;
  54     }
  55
  56     if (!combo->m_hasVMT) return;
  57
  58     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  59     event.SetString( combo->GetValue() );
  60     event.SetEventObject( combo );
  61     combo->GetEventHandler()->ProcessEvent( event );
  62 }
  63 }
  64
  65 extern "C" {
  66 static void
  67 gtk_dummy_callback(GtkEntry *WXUNUSED(entry), GtkCombo *WXUNUSED(combo))
  68 {
  69 }
  70 }
  71
  72 extern "C" {
  73 static void
  74 gtk_popup_hide_callback(GtkCombo *WXUNUSED(gtk_combo), wxComboBox *combo)
  75 {
  76     // when the popup is hidden, throw a SELECTED event only if the combobox
  77     // selection changed.
  78     const int curSelection = combo->GetCurrentSelection();
  79
  80     const bool hasChanged = curSelection != g_SelectionBeforePopup;
  81
  82     // reset the selection flag to value meaning that it is hidden and do it
  83     // now, before generating the events, so that GetSelection() returns the
  84     // new value from the event handler
  85     g_SelectionBeforePopup = wxID_NONE;
  86
  87     if ( hasChanged )
  88     {
  89         wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
  90         event.SetInt( curSelection );
  91         event.SetString( combo->GetStringSelection() );
  92         event.SetEventObject( combo );
  93         combo->GetEventHandler()->ProcessEvent( event );
  94
  95         // for consistency with the other ports, send TEXT event
  96         wxCommandEvent event2( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  97         event2.SetString( combo->GetStringSelection() );
  98         event2.SetEventObject( combo );
  99         combo->GetEventHandler()->ProcessEvent( event2 );
 100     }
 101 }
 102 }
 103
 104 extern "C" {
 105 static void
 106 gtk_popup_show_callback(GtkCombo *WXUNUSED(gtk_combo), wxComboBox *combo)
 107 {
 108     // store the combobox selection value before the popup is shown
 109     g_SelectionBeforePopup = combo->GetCurrentSelection();
 110 }
 111 }
 112
 113 //-----------------------------------------------------------------------------
 114 // "select-child" - click/cursor get select-child, changed, select-child
 115 //-----------------------------------------------------------------------------
 116
 117 extern "C" {
 118 static void
 119 gtk_combo_select_child_callback( GtkList *WXUNUSED(list), GtkWidget *WXUNUSED(widget), wxComboBox *combo )
 120 {
 121     if (g_isIdle) wxapp_install_idle_handler();
 122
 123     if (!combo->m_hasVMT) return;
 124
 125     if (g_blockEventsOnDrag) return;
 126
 127     int curSelection = combo->GetCurrentSelection();
 128
 129     if (combo->m_prevSelection == curSelection) return;
 130
 131     GtkWidget *list = GTK_COMBO(combo->m_widget)->list;
 132     gtk_list_unselect_item( GTK_LIST(list), combo->m_prevSelection );
 133
 134     combo->m_prevSelection = curSelection;
 135
 136     // Quickly set the value of the combo box
 137     // as GTK+ does that only AFTER the event
 138     // is sent.
 139     g_signal_handlers_disconnect_by_func (GTK_COMBO (combo->GetHandle())->entry,
 140                                           (gpointer) gtk_text_changed_callback,
 141                                           combo);
 142     combo->SetValue( combo->GetStringSelection() );
 143     g_signal_connect_after (GTK_COMBO (combo->GetHandle())->entry, "changed",
 144                             G_CALLBACK (gtk_text_changed_callback), 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->GetEventHandler()->ProcessEvent( 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->GetEventHandler()->ProcessEvent( 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     g_signal_handler_disconnect (combo->entry, combo->entry_change_id);
 232     // ... and add surrogate handler.
 233     combo->entry_change_id = g_signal_connect (combo->entry, "changed",
 234                                                G_CALLBACK (gtk_dummy_callback),
 235                                                combo);
 236
 237     // make it more useable
 238     gtk_combo_set_use_arrows_always( GTK_COMBO(m_widget), TRUE );
 239
 240     // and case-sensitive
 241     gtk_combo_set_case_sensitive( GTK_COMBO(m_widget), TRUE );
 242
 243     if (style & wxNO_BORDER)
 244         g_object_set( GTK_ENTRY( combo->entry ), "has-frame", FALSE, NULL );
 245
 246     GtkWidget *list = GTK_COMBO(m_widget)->list;
 247
 248     for (int i = 0; i < n; i++)
 249     {
 250         GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( choices[i] ) );
 251
 252         m_clientDataList.Append( (wxObject*)NULL );
 253         m_clientObjectList.Append( (wxObject*)NULL );
 254
 255         gtk_container_add( GTK_CONTAINER(list), list_item );
 256
 257         gtk_widget_show( list_item );
 258     }
 259
 260     m_parent->DoAddChild( this );
 261
 262     m_focusWidget = combo->entry;
 263
 264     PostCreation(size);
 265
 266     ConnectWidget( combo->button );
 267
 268     // MSW's combo box shows the value and the selection is -1
 269     gtk_entry_set_text( GTK_ENTRY(combo->entry), wxGTK_CONV(value) );
 270     gtk_list_unselect_all( GTK_LIST(combo->list) );
 271
 272     if (style & wxCB_READONLY)
 273         gtk_entry_set_editable( GTK_ENTRY( combo->entry ), FALSE );
 274
 275     // "show" and "hide" events are generated when user click on the combobox button which popups a list
 276     // this list is the "popwin" gtk widget
 277     g_signal_connect (GTK_COMBO(combo)->popwin, "hide",
 278                       G_CALLBACK (gtk_popup_hide_callback), this);
 279     g_signal_connect (GTK_COMBO(combo)->popwin, "show",
 280                       G_CALLBACK (gtk_popup_show_callback), this);
 281
 282     g_signal_connect_after (combo->entry, "changed",
 283                             G_CALLBACK (gtk_text_changed_callback), this);
 284
 285     g_signal_connect_after (combo->list, "select-child",
 286                             G_CALLBACK (gtk_combo_select_child_callback),
 287                             this);
 288
 289     SetBestSize(size); // need this too because this is a wxControlWithItems
 290
 291     // This is required for tool bar support
 292 //    wxSize setsize = GetSize();
 293 //    gtk_widget_set_size_request( m_widget, setsize.x, setsize.y );
 294
 295     return true;
 296 }
 297
 298 wxComboBox::~wxComboBox()
 299 {
 300     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 301     while (node)
 302     {
 303         wxClientData *cd = (wxClientData*)node->GetData();
 304         if (cd) delete cd;
 305         node = node->GetNext();
 306     }
 307     m_clientObjectList.Clear();
 308
 309     m_clientDataList.Clear();
 310 }
 311
 312 void wxComboBox::SetFocus()
 313 {
 314     if ( m_hasFocus )
 315     {
 316         // don't do anything if we already have focus
 317         return;
 318     }
 319
 320     gtk_widget_grab_focus( m_focusWidget );
 321 }
 322
 323 int wxComboBox::DoAppend( const wxString &item )
 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     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 332
 333     gtk_container_add( GTK_CONTAINER(list), list_item );
 334
 335     if (GTK_WIDGET_REALIZED(m_widget))
 336     {
 337         gtk_widget_realize( list_item );
 338         gtk_widget_realize( GTK_BIN(list_item)->child );
 339     }
 340
 341     // Apply current widget style to the new list_item
 342     GtkRcStyle *style = CreateWidgetStyle();
 343     if (style)
 344     {
 345         gtk_widget_modify_style( GTK_WIDGET( list_item ), style );
 346         GtkBin *bin = GTK_BIN( list_item );
 347         GtkWidget *label = GTK_WIDGET( bin->child );
 348         gtk_widget_modify_style( label, style );
 349         gtk_rc_style_unref( style );
 350     }
 351
 352     gtk_widget_show( list_item );
 353
 354     const int count = GetCount();
 355
 356     if ( (int)m_clientDataList.GetCount() < count )
 357         m_clientDataList.Append( (wxObject*) NULL );
 358     if ( (int)m_clientObjectList.GetCount() < count )
 359         m_clientObjectList.Append( (wxObject*) NULL );
 360
 361     EnableEvents();
 362
 363     InvalidateBestSize();
 364
 365     return count - 1;
 366 }
 367
 368 int wxComboBox::DoInsert( const wxString &item, int pos )
 369 {
 370     wxCHECK_MSG( !(GetWindowStyle() & wxCB_SORT), -1,
 371                     wxT("can't insert into sorted list"));
 372
 373     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 374
 375     int count = GetCount();
 376     wxCHECK_MSG( (pos >= 0) && (pos <= count), -1, wxT("invalid index") );
 377
 378     if (pos == count)
 379         return Append(item);
 380
 381     DisableEvents();
 382
 383     GtkWidget *list = GTK_COMBO(m_widget)->list;
 384
 385     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 386
 387     GList *gitem_list = g_list_alloc ();
 388     gitem_list->data = list_item;
 389     gtk_list_insert_items( GTK_LIST (list), gitem_list, pos );
 390
 391     if (GTK_WIDGET_REALIZED(m_widget))
 392     {
 393         gtk_widget_realize( list_item );
 394         gtk_widget_realize( GTK_BIN(list_item)->child );
 395
 396         ApplyWidgetStyle();
 397     }
 398
 399     gtk_widget_show( list_item );
 400
 401     count = GetCount();
 402
 403     if ( (int)m_clientDataList.GetCount() < count )
 404         m_clientDataList.Insert( pos, (wxObject*) NULL );
 405     if ( (int)m_clientObjectList.GetCount() < count )
 406         m_clientObjectList.Insert( pos, (wxObject*) NULL );
 407
 408     EnableEvents();
 409
 410     InvalidateBestSize();
 411
 412     return pos;
 413 }
 414
 415 void wxComboBox::DoSetItemClientData( int n, void* clientData )
 416 {
 417     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 418
 419     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 420     if (!node) return;
 421
 422     node->SetData( (wxObject*) clientData );
 423 }
 424
 425 void* wxComboBox::DoGetItemClientData( int n ) const
 426 {
 427     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 428
 429     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 430
 431     return node ? node->GetData() : NULL;
 432 }
 433
 434 void wxComboBox::DoSetItemClientObject( int n, wxClientData* clientData )
 435 {
 436     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 437
 438     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 439     if (!node) return;
 440
 441     // wxItemContainer already deletes data for us
 442
 443     node->SetData( (wxObject*) clientData );
 444 }
 445
 446 wxClientData* wxComboBox::DoGetItemClientObject( int n ) const
 447 {
 448     wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, wxT("invalid combobox") );
 449
 450     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 451
 452     return node ? (wxClientData*) node->GetData() : NULL;
 453 }
 454
 455 void wxComboBox::Clear()
 456 {
 457     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 458
 459     DisableEvents();
 460
 461     GtkWidget *list = GTK_COMBO(m_widget)->list;
 462     gtk_list_clear_items( GTK_LIST(list), 0, GetCount() );
 463
 464     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 465     while (node)
 466     {
 467         wxClientData *cd = (wxClientData*)node->GetData();
 468         if (cd) delete cd;
 469         node = node->GetNext();
 470     }
 471     m_clientObjectList.Clear();
 472
 473     m_clientDataList.Clear();
 474
 475     EnableEvents();
 476
 477     InvalidateBestSize();
 478 }
 479
 480 void wxComboBox::Delete( int n )
 481 {
 482     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 483
 484     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 485
 486     GList *child = g_list_nth( listbox->children, n );
 487
 488     if (!child)
 489     {
 490         wxFAIL_MSG(wxT("wrong index"));
 491         return;
 492     }
 493
 494     DisableEvents();
 495
 496     GList *list = g_list_append( (GList*) NULL, child->data );
 497     gtk_list_remove_items( listbox, list );
 498     g_list_free( list );
 499
 500     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 501     if (node)
 502     {
 503         wxClientData *cd = (wxClientData*)node->GetData();
 504         if (cd) delete cd;
 505         m_clientObjectList.Erase( node );
 506     }
 507
 508     node = m_clientDataList.Item( n );
 509     if (node)
 510         m_clientDataList.Erase( node );
 511
 512     EnableEvents();
 513
 514     InvalidateBestSize();
 515 }
 516
 517 void wxComboBox::SetString(int n, const wxString &text)
 518 {
 519     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 520
 521     GtkWidget *list = GTK_COMBO(m_widget)->list;
 522
 523     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 524     if (child)
 525     {
 526         GtkBin *bin = GTK_BIN( child->data );
 527         GtkLabel *label = GTK_LABEL( bin->child );
 528         gtk_label_set_text(label, wxGTK_CONV(text));
 529     }
 530     else
 531     {
 532         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 533     }
 534
 535     InvalidateBestSize();
 536 }
 537
 538 int wxComboBox::FindString( const wxString &item, bool bCase ) const
 539 {
 540     wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid combobox") );
 541
 542     GtkWidget *list = GTK_COMBO(m_widget)->list;
 543
 544     GList *child = GTK_LIST(list)->children;
 545     int count = 0;
 546     while (child)
 547     {
 548         GtkBin *bin = GTK_BIN( child->data );
 549         GtkLabel *label = GTK_LABEL( bin->child );
 550         wxString str( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 551
 552         if (item.IsSameAs( str , bCase ) )
 553             return count;
 554
 555         count++;
 556         child = child->next;
 557     }
 558
 559     return wxNOT_FOUND;
 560 }
 561
 562 int wxComboBox::GetSelection() const
 563 {
 564     // if the popup is currently opened, use the selection as it had been
 565     // before it dropped down
 566     return g_SelectionBeforePopup == wxID_NONE ? GetCurrentSelection()
 567                                                : g_SelectionBeforePopup;
 568 }
 569
 570 int wxComboBox::GetCurrentSelection() const
 571 {
 572     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 573
 574     GtkWidget *list = GTK_COMBO(m_widget)->list;
 575
 576     GList *selection = GTK_LIST(list)->selection;
 577     if (selection)
 578     {
 579         GList *child = GTK_LIST(list)->children;
 580         int count = 0;
 581         while (child)
 582         {
 583             if (child->data == selection->data) return count;
 584             count++;
 585             child = child->next;
 586         }
 587     }
 588
 589     return -1;
 590 }
 591
 592 wxString wxComboBox::GetString( int n ) const
 593 {
 594     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 595
 596     GtkWidget *list = GTK_COMBO(m_widget)->list;
 597
 598     wxString str;
 599     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 600     if (child)
 601     {
 602         GtkBin *bin = GTK_BIN( child->data );
 603         GtkLabel *label = GTK_LABEL( bin->child );
 604         str = wxGTK_CONV_BACK( gtk_label_get_text(label) );
 605     }
 606     else
 607     {
 608         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 609     }
 610
 611     return str;
 612 }
 613
 614 wxString wxComboBox::GetStringSelection() const
 615 {
 616     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 617
 618     GtkWidget *list = GTK_COMBO(m_widget)->list;
 619
 620     GList *selection = GTK_LIST(list)->selection;
 621     if (selection)
 622     {
 623         GtkBin *bin = GTK_BIN( selection->data );
 624         GtkLabel *label = GTK_LABEL( bin->child );
 625         wxString tmp( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 626         return tmp;
 627     }
 628
 629     wxFAIL_MSG( wxT("wxComboBox: no selection") );
 630
 631     return wxEmptyString;
 632 }
 633
 634 int wxComboBox::GetCount() const
 635 {
 636     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 637
 638     GtkWidget *list = GTK_COMBO(m_widget)->list;
 639
 640     GList *child = GTK_LIST(list)->children;
 641     int count = 0;
 642     while (child) { count++; child = child->next; }
 643     return count;
 644 }
 645
 646 void wxComboBox::SetSelection( int n )
 647 {
 648     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 649
 650     DisableEvents();
 651
 652     GtkWidget *list = GTK_COMBO(m_widget)->list;
 653     gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 654     gtk_list_select_item( GTK_LIST(list), n );
 655     m_prevSelection = n;
 656
 657     EnableEvents();
 658 }
 659
 660 wxString wxComboBox::GetValue() const
 661 {
 662     GtkEntry *entry = GTK_ENTRY( GTK_COMBO(m_widget)->entry );
 663     wxString tmp( wxGTK_CONV_BACK( gtk_entry_get_text( entry ) ) );
 664
 665 #if 0
 666     for (int i = 0; i < wxStrlen(tmp.c_str()) +1; i++)
 667     {
 668         wxChar c = tmp[i];
 669         printf( "%d ", (int) (c) );
 670     }
 671     printf( "\n" );
 672 #endif
 673
 674     return tmp;
 675 }
 676
 677 void wxComboBox::SetValue( const wxString& value )
 678 {
 679     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 680
 681     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 682     wxString tmp;
 683     if (!value.IsNull()) tmp = value;
 684     gtk_entry_set_text( GTK_ENTRY(entry), wxGTK_CONV( tmp ) );
 685
 686     InvalidateBestSize();
 687 }
 688
 689 void wxComboBox::Copy()
 690 {
 691     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 692
 693     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 694     gtk_editable_copy_clipboard(GTK_EDITABLE(entry));
 695 }
 696
 697 void wxComboBox::Cut()
 698 {
 699     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 700
 701     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 702     gtk_editable_cut_clipboard(GTK_EDITABLE(entry));
 703 }
 704
 705 void wxComboBox::Paste()
 706 {
 707     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 708
 709     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 710     gtk_editable_paste_clipboard(GTK_EDITABLE(entry));
 711 }
 712
 713 void wxComboBox::Undo()
 714 {
 715     // TODO
 716 }
 717
 718 void wxComboBox::Redo()
 719 {
 720     // TODO
 721 }
 722
 723 void wxComboBox::SelectAll()
 724 {
 725     SetSelection(0, GetLastPosition());
 726 }
 727
 728 bool wxComboBox::CanUndo() const
 729 {
 730     // TODO
 731     return false;
 732 }
 733
 734 bool wxComboBox::CanRedo() const
 735 {
 736     // TODO
 737     return false;
 738 }
 739
 740 bool wxComboBox::HasSelection() const
 741 {
 742     long from, to;
 743     GetSelection(&from, &to);
 744     return from != to;
 745 }
 746
 747 bool wxComboBox::CanCopy() const
 748 {
 749     // Can copy if there's a selection
 750     return HasSelection();
 751 }
 752
 753 bool wxComboBox::CanCut() const
 754 {
 755     return CanCopy() && IsEditable();
 756 }
 757
 758 bool wxComboBox::CanPaste() const
 759 {
 760     // TODO: check for text on the clipboard
 761     return IsEditable() ;
 762 }
 763
 764 bool wxComboBox::IsEditable() const
 765 {
 766     return !HasFlag(wxCB_READONLY);
 767 }
 768
 769
 770 void wxComboBox::SetInsertionPoint( long pos )
 771 {
 772     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 773
 774     if ( pos == GetLastPosition() )
 775         pos = -1;
 776
 777     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 778     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
 779 }
 780
 781 long wxComboBox::GetInsertionPoint() const
 782 {
 783     return (long) gtk_editable_get_position(GTK_EDITABLE(GTK_COMBO(m_widget)->entry));
 784 }
 785
 786 wxTextPos wxComboBox::GetLastPosition() const
 787 {
 788     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 789     int pos = GTK_ENTRY(entry)->text_length;
 790     return (long) pos-1;
 791 }
 792
 793 void wxComboBox::Replace( long from, long to, const wxString& value )
 794 {
 795     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 796
 797     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 798     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 799     if (value.IsNull()) return;
 800     gint pos = (gint)to;
 801
 802 #if wxUSE_UNICODE
 803     wxCharBuffer buffer = wxConvUTF8.cWX2MB( value );
 804     gtk_editable_insert_text( GTK_EDITABLE(entry), (const char*) buffer, strlen( (const char*) buffer ), &pos );
 805 #else
 806     gtk_editable_insert_text( GTK_EDITABLE(entry), value.c_str(), value.Length(), &pos );
 807 #endif
 808 }
 809
 810 void wxComboBox::SetSelection( long from, long to )
 811 {
 812     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 813     gtk_editable_select_region( GTK_EDITABLE(entry), (gint)from, (gint)to );
 814 }
 815
 816 void wxComboBox::GetSelection( long* from, long* to ) const
 817 {
 818     if (IsEditable())
 819     {
 820         GtkEditable *editable = GTK_EDITABLE(GTK_COMBO(m_widget)->entry);
 821         gint start, end;
 822         gtk_editable_get_selection_bounds(editable, & start, & end);
 823         *from = start;
 824         *to = end;
 825     }
 826 }
 827
 828 void wxComboBox::SetEditable( bool editable )
 829 {
 830     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 831     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 832 }
 833
 834 void wxComboBox::OnChar( wxKeyEvent &event )
 835 {
 836     if ( event.GetKeyCode() == WXK_RETURN )
 837     {
 838         // GTK automatically selects an item if its in the list
 839         wxCommandEvent eventEnter(wxEVT_COMMAND_TEXT_ENTER, GetId());
 840         eventEnter.SetString( GetValue() );
 841         eventEnter.SetInt( GetSelection() );
 842         eventEnter.SetEventObject( this );
 843
 844         if (!GetEventHandler()->ProcessEvent( eventEnter ))
 845         {
 846             // This will invoke the dialog default action, such
 847             // as the clicking the default button.
 848
 849             wxWindow *top_frame = m_parent;
 850             while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 851                 top_frame = top_frame->GetParent();
 852
 853             if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 854             {
 855                 GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 856
 857                 if (window->default_widget)
 858                         gtk_widget_activate (window->default_widget);
 859             }
 860         }
 861
 862         // Catch GTK event so that GTK doesn't open the drop
 863         // down list upon RETURN.
 864         return;
 865     }
 866
 867     event.Skip();
 868 }
 869
 870 void wxComboBox::DisableEvents()
 871 {
 872     g_signal_handlers_disconnect_by_func (GTK_COMBO(m_widget)->list,
 873                                           (gpointer) gtk_combo_select_child_callback,
 874                                           this);
 875     g_signal_handlers_disconnect_by_func (GTK_COMBO(m_widget)->entry,
 876                                           (gpointer) gtk_text_changed_callback,
 877                                           this);
 878 }
 879
 880 void wxComboBox::EnableEvents()
 881 {
 882     g_signal_connect_after (GTK_COMBO(m_widget)->list, "select-child",
 883                             G_CALLBACK (gtk_combo_select_child_callback),
 884                             this);
 885     g_signal_connect_after (GTK_COMBO(m_widget)->entry, "changed",
 886                             G_CALLBACK (gtk_text_changed_callback),
 887                             this );
 888 }
 889
 890 void wxComboBox::OnSize( wxSizeEvent &event )
 891 {
 892     // NB: In some situations (e.g. on non-first page of a wizard, if the
 893     //     size used is default size), GtkCombo widget is resized correctly,
 894     //     but it's look is not updated, it's rendered as if it was much wider.
 895     //     No other widgets are affected, so it looks like a bug in GTK+.
 896     //     Manually requesting resize calculation (as gtk_pizza_set_size does)
 897     //     fixes it.
 898     if (GTK_WIDGET_VISIBLE(m_widget))
 899         gtk_widget_queue_resize(m_widget);
 900
 901     event.Skip();
 902 }
 903
 904 void wxComboBox::DoApplyWidgetStyle(GtkRcStyle *style)
 905 {
 906 //    gtk_widget_modify_style( GTK_COMBO(m_widget)->button, syle );
 907
 908     gtk_widget_modify_style( GTK_COMBO(m_widget)->entry, style );
 909     gtk_widget_modify_style( GTK_COMBO(m_widget)->list, style );
 910
 911     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 912     GList *child = list->children;
 913     while (child)
 914     {
 915         gtk_widget_modify_style( GTK_WIDGET(child->data), style );
 916
 917         GtkBin *bin = GTK_BIN(child->data);
 918         gtk_widget_modify_style( bin->child, style );
 919
 920         child = child->next;
 921     }
 922 }
 923
 924 GtkWidget* wxComboBox::GetConnectWidget()
 925 {
 926     return GTK_COMBO(m_widget)->entry;
 927 }
 928
 929 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 930 {
 931     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 932              (window == GTK_COMBO(m_widget)->button->window ) );
 933 }
 934
 935 wxSize wxComboBox::DoGetBestSize() const
 936 {
 937     wxSize ret( wxControl::DoGetBestSize() );
 938
 939     // we know better our horizontal extent: it depends on the longest string
 940     // in the combobox
 941     if ( m_widget )
 942     {
 943         int width;
 944         size_t count = GetCount();
 945         for ( size_t n = 0; n < count; n++ )
 946         {
 947             GetTextExtent( GetString(n), &width, NULL, NULL, NULL );
 948             if ( width > ret.x )
 949                 ret.x = width;
 950         }
 951     }
 952
 953     // empty combobox should have some reasonable default size too
 954     if ( ret.x < 100 )
 955         ret.x = 100;
 956
 957     CacheBestSize(ret);
 958     return ret;
 959 }
 960
 961 // static
 962 wxVisualAttributes
 963 wxComboBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 964 {
 965     return GetDefaultAttributesFromGTKWidget(gtk_combo_new, true);
 966 }
 967
 968 // ----------------------------------------------------------------------------
 969 // standard event handling
 970 // ----------------------------------------------------------------------------
 971
 972 void wxComboBox::OnCut(wxCommandEvent& WXUNUSED(event))
 973 {
 974     Cut();
 975 }
 976
 977 void wxComboBox::OnCopy(wxCommandEvent& WXUNUSED(event))
 978 {
 979     Copy();
 980 }
 981
 982 void wxComboBox::OnPaste(wxCommandEvent& WXUNUSED(event))
 983 {
 984     Paste();
 985 }
 986
 987 void wxComboBox::OnUndo(wxCommandEvent& WXUNUSED(event))
 988 {
 989     Undo();
 990 }
 991
 992 void wxComboBox::OnRedo(wxCommandEvent& WXUNUSED(event))
 993 {
 994     Redo();
 995 }
 996
 997 void wxComboBox::OnDelete(wxCommandEvent& WXUNUSED(event))
 998 {
 999     long from, to;
1000     GetSelection(& from, & to);
1001     if (from != -1 && to != -1)
1002         Remove(from, to);
1003 }
1004
1005 void wxComboBox::OnSelectAll(wxCommandEvent& WXUNUSED(event))
1006 {
1007     SetSelection(-1, -1);
1008 }
1009
1010 void wxComboBox::OnUpdateCut(wxUpdateUIEvent& event)
1011 {
1012     event.Enable( CanCut() );
1013 }
1014
1015 void wxComboBox::OnUpdateCopy(wxUpdateUIEvent& event)
1016 {
1017     event.Enable( CanCopy() );
1018 }
1019
1020 void wxComboBox::OnUpdatePaste(wxUpdateUIEvent& event)
1021 {
1022     event.Enable( CanPaste() );
1023 }
1024
1025 void wxComboBox::OnUpdateUndo(wxUpdateUIEvent& event)
1026 {
1027     event.Enable( CanUndo() );
1028 }
1029
1030 void wxComboBox::OnUpdateRedo(wxUpdateUIEvent& event)
1031 {
1032     event.Enable( CanRedo() );
1033 }
1034
1035 void wxComboBox::OnUpdateDelete(wxUpdateUIEvent& event)
1036 {
1037     event.Enable(HasSelection() && IsEditable()) ;
1038 }
1039
1040 void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event)
1041 {
1042     event.Enable(GetLastPosition() > 0);
1043 }
1044
1045 #endif