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->GetEventHandler()->ProcessEvent( 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->GetEventHandler()->ProcessEvent( 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->GetEventHandler()->ProcessEvent( 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->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     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     SetBestSize(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::DoAppend( const wxString &item )
 321 {
 322     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 323
 324     DisableEvents();
 325
 326     GtkWidget *list = GTK_COMBO(m_widget)->list;
 327
 328     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 329
 330     gtk_container_add( GTK_CONTAINER(list), list_item );
 331
 332     if (GTK_WIDGET_REALIZED(m_widget))
 333     {
 334         gtk_widget_realize( list_item );
 335         gtk_widget_realize( GTK_BIN(list_item)->child );
 336     }
 337
 338     // Apply current widget style to the new list_item
 339     GtkRcStyle *style = CreateWidgetStyle();
 340     if (style)
 341     {
 342         gtk_widget_modify_style( GTK_WIDGET( list_item ), style );
 343         GtkBin *bin = GTK_BIN( list_item );
 344         GtkWidget *label = GTK_WIDGET( bin->child );
 345         gtk_widget_modify_style( label, style );
 346         gtk_rc_style_unref( style );
 347     }
 348
 349     gtk_widget_show( list_item );
 350
 351     const unsigned int count = GetCount();
 352
 353     if ( m_clientDataList.GetCount() < count )
 354         m_clientDataList.Append( (wxObject*) NULL );
 355     if ( m_clientObjectList.GetCount() < count )
 356         m_clientObjectList.Append( (wxObject*) NULL );
 357
 358     EnableEvents();
 359
 360     InvalidateBestSize();
 361
 362     return count - 1;
 363 }
 364
 365 int wxComboBox::DoInsert( const wxString &item, unsigned int pos )
 366 {
 367     wxCHECK_MSG( !(GetWindowStyle() & wxCB_SORT), -1,
 368                     wxT("can't insert into sorted list"));
 369
 370     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 371
 372     wxCHECK_MSG( IsValidInsert(pos), -1, wxT("invalid index") );
 373
 374     if (pos == GetCount())
 375         return Append(item);
 376
 377     DisableEvents();
 378
 379     GtkWidget *list = GTK_COMBO(m_widget)->list;
 380
 381     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 382
 383     GList *gitem_list = g_list_alloc ();
 384     gitem_list->data = list_item;
 385     gtk_list_insert_items( GTK_LIST (list), gitem_list, pos );
 386
 387     if (GTK_WIDGET_REALIZED(m_widget))
 388     {
 389         gtk_widget_realize( list_item );
 390         gtk_widget_realize( GTK_BIN(list_item)->child );
 391
 392         ApplyWidgetStyle();
 393     }
 394
 395     gtk_widget_show( list_item );
 396
 397     const unsigned int count = GetCount();
 398
 399     if ( m_clientDataList.GetCount() < count )
 400         m_clientDataList.Insert( pos, (wxObject*) NULL );
 401     if ( m_clientObjectList.GetCount() < count )
 402         m_clientObjectList.Insert( pos, (wxObject*) NULL );
 403
 404     EnableEvents();
 405
 406     InvalidateBestSize();
 407
 408     return pos;
 409 }
 410
 411 void wxComboBox::DoSetItemClientData(unsigned int n, void* clientData)
 412 {
 413     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 414
 415     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 416     if (!node) return;
 417
 418     node->SetData( (wxObject*) clientData );
 419 }
 420
 421 void* wxComboBox::DoGetItemClientData(unsigned int n) const
 422 {
 423     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 424
 425     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 426
 427     return node ? node->GetData() : NULL;
 428 }
 429
 430 void wxComboBox::DoSetItemClientObject(unsigned int n, wxClientData* clientData)
 431 {
 432     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 433
 434     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 435     if (!node) return;
 436
 437     // wxItemContainer already deletes data for us
 438
 439     node->SetData( (wxObject*) clientData );
 440 }
 441
 442 wxClientData* wxComboBox::DoGetItemClientObject(unsigned int n) const
 443 {
 444     wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, wxT("invalid combobox") );
 445
 446     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 447
 448     return node ? (wxClientData*) node->GetData() : NULL;
 449 }
 450
 451 void wxComboBox::Clear()
 452 {
 453     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 454
 455     DisableEvents();
 456
 457     GtkWidget *list = GTK_COMBO(m_widget)->list;
 458     gtk_list_clear_items( GTK_LIST(list), 0, (int)GetCount() );
 459
 460     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 461     while (node)
 462     {
 463         wxClientData *cd = (wxClientData*)node->GetData();
 464         if (cd) delete cd;
 465         node = node->GetNext();
 466     }
 467     m_clientObjectList.Clear();
 468
 469     m_clientDataList.Clear();
 470
 471     EnableEvents();
 472
 473     InvalidateBestSize();
 474 }
 475
 476 void wxComboBox::Delete(unsigned int n)
 477 {
 478     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 479
 480     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 481
 482     GList *child = g_list_nth( listbox->children, n );
 483
 484     if (!child)
 485     {
 486         wxFAIL_MSG(wxT("wrong index"));
 487         return;
 488     }
 489
 490     DisableEvents();
 491
 492     GList *list = g_list_append( (GList*) NULL, child->data );
 493     gtk_list_remove_items( listbox, list );
 494     g_list_free( list );
 495
 496     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 497     if (node)
 498     {
 499         wxClientData *cd = (wxClientData*)node->GetData();
 500         if (cd) delete cd;
 501         m_clientObjectList.Erase( node );
 502     }
 503
 504     node = m_clientDataList.Item( n );
 505     if (node)
 506         m_clientDataList.Erase( node );
 507
 508     EnableEvents();
 509
 510     InvalidateBestSize();
 511 }
 512
 513 void wxComboBox::SetString(unsigned int n, const wxString &text)
 514 {
 515     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 516
 517     GtkWidget *list = GTK_COMBO(m_widget)->list;
 518
 519     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 520     if (child)
 521     {
 522         GtkBin *bin = GTK_BIN( child->data );
 523         GtkLabel *label = GTK_LABEL( bin->child );
 524         gtk_label_set_text(label, wxGTK_CONV(text));
 525     }
 526     else
 527     {
 528         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 529     }
 530
 531     InvalidateBestSize();
 532 }
 533
 534 int wxComboBox::FindString( const wxString &item, bool bCase ) const
 535 {
 536     wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid combobox") );
 537
 538     GtkWidget *list = GTK_COMBO(m_widget)->list;
 539
 540     GList *child = GTK_LIST(list)->children;
 541     int count = 0;
 542     while (child)
 543     {
 544         GtkBin *bin = GTK_BIN( child->data );
 545         GtkLabel *label = GTK_LABEL( bin->child );
 546         wxString str( label->label );
 547         if (item.IsSameAs( str , bCase ) )
 548             return count;
 549
 550         count++;
 551         child = child->next;
 552     }
 553
 554     return wxNOT_FOUND;
 555 }
 556
 557 int wxComboBox::GetSelection() const
 558 {
 559     // if the popup is currently opened, use the selection as it had been
 560     // before it dropped down
 561     return g_SelectionBeforePopup == wxID_NONE ? GetCurrentSelection()
 562                                                : g_SelectionBeforePopup;
 563 }
 564
 565 int wxComboBox::GetCurrentSelection() const
 566 {
 567     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 568
 569     GtkWidget *list = GTK_COMBO(m_widget)->list;
 570
 571     GList *selection = GTK_LIST(list)->selection;
 572     if (selection)
 573     {
 574         GList *child = GTK_LIST(list)->children;
 575         int count = 0;
 576         while (child)
 577         {
 578             if (child->data == selection->data) return count;
 579             count++;
 580             child = child->next;
 581         }
 582     }
 583
 584     return wxNOT_FOUND;
 585 }
 586
 587 wxString wxComboBox::GetString(unsigned int n) const
 588 {
 589     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 590
 591     GtkWidget *list = GTK_COMBO(m_widget)->list;
 592
 593     wxString str;
 594     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 595     if (child)
 596     {
 597         GtkBin *bin = GTK_BIN( child->data );
 598         GtkLabel *label = GTK_LABEL( bin->child );
 599         str = wxString( label->label );
 600     }
 601     else
 602     {
 603         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 604     }
 605
 606     return str;
 607 }
 608
 609 wxString wxComboBox::GetStringSelection() const
 610 {
 611     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 612
 613     GtkWidget *list = GTK_COMBO(m_widget)->list;
 614
 615     GList *selection = GTK_LIST(list)->selection;
 616     if (selection)
 617     {
 618         GtkBin *bin = GTK_BIN( selection->data );
 619         GtkLabel *label = GTK_LABEL( bin->child );
 620         wxString tmp( label->label );
 621         return tmp;
 622     }
 623
 624     wxFAIL_MSG( wxT("wxComboBox: no selection") );
 625
 626     return wxEmptyString;
 627 }
 628
 629 unsigned int wxComboBox::GetCount() const
 630 {
 631     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 632
 633     GtkWidget *list = GTK_COMBO(m_widget)->list;
 634
 635     GList *child = GTK_LIST(list)->children;
 636     unsigned int count = 0;
 637     while (child) { count++; child = child->next; }
 638     return count;
 639 }
 640
 641 void wxComboBox::SetSelection( int n )
 642 {
 643     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 644
 645     DisableEvents();
 646
 647     GtkWidget *list = GTK_COMBO(m_widget)->list;
 648     gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 649     gtk_list_select_item( GTK_LIST(list), n );
 650     m_prevSelection = n;
 651
 652     EnableEvents();
 653 }
 654
 655 wxString wxComboBox::GetValue() const
 656 {
 657     GtkEntry *entry = GTK_ENTRY( GTK_COMBO(m_widget)->entry );
 658     wxString tmp( wxGTK_CONV_BACK( gtk_entry_get_text( entry ) ) );
 659
 660 #if 0
 661     for (int i = 0; i < wxStrlen(tmp.c_str()) +1; i++)
 662     {
 663         wxChar c = tmp[i];
 664         printf( "%d ", (int) (c) );
 665     }
 666     printf( "\n" );
 667 #endif
 668
 669     return tmp;
 670 }
 671
 672 void wxComboBox::SetValue( const wxString& value )
 673 {
 674     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 675
 676     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 677     wxString tmp;
 678     if (!value.IsNull()) tmp = value;
 679     gtk_entry_set_text( GTK_ENTRY(entry), wxGTK_CONV( tmp ) );
 680
 681     InvalidateBestSize();
 682 }
 683
 684 void wxComboBox::Copy()
 685 {
 686     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 687
 688     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 689     gtk_editable_copy_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 690 }
 691
 692 void wxComboBox::Cut()
 693 {
 694     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 695
 696     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 697     gtk_editable_cut_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 698 }
 699
 700 void wxComboBox::Paste()
 701 {
 702     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 703
 704     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 705     gtk_editable_paste_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG);
 706 }
 707
 708 void wxComboBox::Undo()
 709 {
 710     // TODO
 711 }
 712
 713 void wxComboBox::Redo()
 714 {
 715     // TODO
 716 }
 717
 718 void wxComboBox::SelectAll()
 719 {
 720     SetSelection(0, GetLastPosition());
 721 }
 722
 723 bool wxComboBox::CanUndo() const
 724 {
 725     // TODO
 726     return false;
 727 }
 728
 729 bool wxComboBox::CanRedo() const
 730 {
 731     // TODO
 732     return false;
 733 }
 734
 735 bool wxComboBox::HasSelection() const
 736 {
 737     long from, to;
 738     GetSelection(&from, &to);
 739     return from != to;
 740 }
 741
 742 bool wxComboBox::CanCopy() const
 743 {
 744     // Can copy if there's a selection
 745     return HasSelection();
 746 }
 747
 748 bool wxComboBox::CanCut() const
 749 {
 750     return CanCopy() && IsEditable();
 751 }
 752
 753 bool wxComboBox::CanPaste() const
 754 {
 755     // TODO: check for text on the clipboard
 756     return IsEditable() ;
 757 }
 758
 759 bool wxComboBox::IsEditable() const
 760 {
 761     return !HasFlag(wxCB_READONLY);
 762 }
 763
 764
 765 void wxComboBox::SetInsertionPoint( long pos )
 766 {
 767     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 768
 769     if ( pos == GetLastPosition() )
 770         pos = -1;
 771
 772     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 773     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
 774 }
 775
 776 long wxComboBox::GetInsertionPoint() const
 777 {
 778     return (long) GET_EDITABLE_POS( GTK_COMBO(m_widget)->entry );
 779 }
 780
 781 wxTextPos wxComboBox::GetLastPosition() const
 782 {
 783     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 784     int pos = GTK_ENTRY(entry)->text_length;
 785     return (long) pos-1;
 786 }
 787
 788 void wxComboBox::Replace( long from, long to, const wxString& value )
 789 {
 790     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 791
 792     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 793     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 794     if (value.IsNull()) return;
 795     gint pos = (gint)to;
 796
 797 #if wxUSE_UNICODE
 798     wxCharBuffer buffer = wxConvUTF8.cWX2MB( value );
 799     gtk_editable_insert_text( GTK_EDITABLE(entry), (const char*) buffer, strlen( (const char*) buffer ), &pos );
 800 #else
 801     gtk_editable_insert_text( GTK_EDITABLE(entry), value.c_str(), value.length(), &pos );
 802 #endif
 803 }
 804
 805 void wxComboBox::SetSelection( long from, long to )
 806 {
 807     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 808     gtk_editable_select_region( GTK_EDITABLE(entry), (gint)from, (gint)to );
 809 }
 810
 811 void wxComboBox::GetSelection( long* from, long* to ) const
 812 {
 813     if (IsEditable())
 814     {
 815         GtkEditable *editable = GTK_EDITABLE(GTK_COMBO(m_widget)->entry);
 816         *from = (long) editable->selection_start_pos;
 817         *to = (long) editable->selection_end_pos;
 818     }
 819 }
 820
 821 void wxComboBox::SetEditable( bool editable )
 822 {
 823     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 824     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 825 }
 826
 827 void wxComboBox::OnChar( wxKeyEvent &event )
 828 {
 829     if ( event.GetKeyCode() == WXK_RETURN )
 830     {
 831         // GTK automatically selects an item if its in the list
 832         wxCommandEvent eventEnter(wxEVT_COMMAND_TEXT_ENTER, GetId());
 833         eventEnter.SetString( GetValue() );
 834         eventEnter.SetInt( GetSelection() );
 835         eventEnter.SetEventObject( this );
 836
 837         if (!GetEventHandler()->ProcessEvent( eventEnter ))
 838         {
 839             // This will invoke the dialog default action, such
 840             // as the clicking the default button.
 841
 842             wxWindow *top_frame = m_parent;
 843             while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 844                 top_frame = top_frame->GetParent();
 845
 846             if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 847             {
 848                 GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 849
 850                 if (window->default_widget)
 851                         gtk_widget_activate (window->default_widget);
 852             }
 853         }
 854
 855         // Catch GTK event so that GTK doesn't open the drop
 856         // down list upon RETURN.
 857         return;
 858     }
 859
 860     event.Skip();
 861 }
 862
 863 void wxComboBox::DisableEvents()
 864 {
 865     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->list),
 866       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 867     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->entry),
 868       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 869 }
 870
 871 void wxComboBox::EnableEvents()
 872 {
 873     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(m_widget)->list), "select-child",
 874       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 875     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
 876       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 877 }
 878
 879 void wxComboBox::OnSize( wxSizeEvent &event )
 880 {
 881     // NB: In some situations (e.g. on non-first page of a wizard, if the
 882     //     size used is default size), GtkCombo widget is resized correctly,
 883     //     but it's look is not updated, it's rendered as if it was much wider.
 884     //     No other widgets are affected, so it looks like a bug in GTK+.
 885     //     Manually requesting resize calculation (as gtk_pizza_set_size does)
 886     //     fixes it.
 887     if (GTK_WIDGET_VISIBLE(m_widget))
 888         gtk_widget_queue_resize(m_widget);
 889
 890     event.Skip();
 891 }
 892
 893 void wxComboBox::DoApplyWidgetStyle(GtkRcStyle *style)
 894 {
 895 //    gtk_widget_modify_style( GTK_COMBO(m_widget)->button, syle );
 896
 897     gtk_widget_modify_style( GTK_COMBO(m_widget)->entry, style );
 898     gtk_widget_modify_style( GTK_COMBO(m_widget)->list, style );
 899
 900     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 901     GList *child = list->children;
 902     while (child)
 903     {
 904         gtk_widget_modify_style( GTK_WIDGET(child->data), style );
 905
 906         GtkBin *bin = GTK_BIN(child->data);
 907         gtk_widget_modify_style( bin->child, style );
 908
 909         child = child->next;
 910     }
 911 }
 912
 913 GtkWidget* wxComboBox::GetConnectWidget()
 914 {
 915     return GTK_COMBO(m_widget)->entry;
 916 }
 917
 918 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 919 {
 920     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 921              (window == GTK_COMBO(m_widget)->button->window ) );
 922 }
 923
 924 wxSize wxComboBox::DoGetBestSize() const
 925 {
 926     wxSize ret( wxControl::DoGetBestSize() );
 927
 928     // we know better our horizontal extent: it depends on the longest string
 929     // in the combobox
 930     if ( m_widget )
 931     {
 932         int width;
 933         unsigned int count = GetCount();
 934         for ( unsigned int n = 0; n < count; n++ )
 935         {
 936             GetTextExtent(GetString(n), &width, NULL, NULL, NULL );
 937             if ( width > ret.x )
 938                 ret.x = width;
 939         }
 940     }
 941
 942     // empty combobox should have some reasonable default size too
 943     if ( ret.x < 100 )
 944         ret.x = 100;
 945
 946     CacheBestSize(ret);
 947     return ret;
 948 }
 949
 950 // static
 951 wxVisualAttributes
 952 wxComboBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 953 {
 954     return GetDefaultAttributesFromGTKWidget(gtk_combo_new, true);
 955 }
 956
 957 // ----------------------------------------------------------------------------
 958 // standard event handling
 959 // ----------------------------------------------------------------------------
 960
 961 void wxComboBox::OnCut(wxCommandEvent& WXUNUSED(event))
 962 {
 963     Cut();
 964 }
 965
 966 void wxComboBox::OnCopy(wxCommandEvent& WXUNUSED(event))
 967 {
 968     Copy();
 969 }
 970
 971 void wxComboBox::OnPaste(wxCommandEvent& WXUNUSED(event))
 972 {
 973     Paste();
 974 }
 975
 976 void wxComboBox::OnUndo(wxCommandEvent& WXUNUSED(event))
 977 {
 978     Undo();
 979 }
 980
 981 void wxComboBox::OnRedo(wxCommandEvent& WXUNUSED(event))
 982 {
 983     Redo();
 984 }
 985
 986 void wxComboBox::OnDelete(wxCommandEvent& WXUNUSED(event))
 987 {
 988     long from, to;
 989     GetSelection(& from, & to);
 990     if (from != -1 && to != -1)
 991         Remove(from, to);
 992 }
 993
 994 void wxComboBox::OnSelectAll(wxCommandEvent& WXUNUSED(event))
 995 {
 996     SetSelection(-1, -1);
 997 }
 998
 999 void wxComboBox::OnUpdateCut(wxUpdateUIEvent& event)
1000 {
1001     event.Enable( CanCut() );
1002 }
1003
1004 void wxComboBox::OnUpdateCopy(wxUpdateUIEvent& event)
1005 {
1006     event.Enable( CanCopy() );
1007 }
1008
1009 void wxComboBox::OnUpdatePaste(wxUpdateUIEvent& event)
1010 {
1011     event.Enable( CanPaste() );
1012 }
1013
1014 void wxComboBox::OnUpdateUndo(wxUpdateUIEvent& event)
1015 {
1016     event.Enable( CanUndo() );
1017 }
1018
1019 void wxComboBox::OnUpdateRedo(wxUpdateUIEvent& event)
1020 {
1021     event.Enable( CanRedo() );
1022 }
1023
1024 void wxComboBox::OnUpdateDelete(wxUpdateUIEvent& event)
1025 {
1026     event.Enable(HasSelection() && IsEditable()) ;
1027 }
1028
1029 void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event)
1030 {
1031     event.Enable(GetLastPosition() > 0);
1032 }
1033
1034 #endif