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     int curSelection = combo->GetCurrentSelection();
  79     if (g_SelectionBeforePopup != curSelection)
  80     {
  81         wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
  82         event.SetInt( curSelection );
  83         event.SetString( combo->GetStringSelection() );
  84         event.SetEventObject( combo );
  85         combo->GetEventHandler()->ProcessEvent( event );
  86
  87         // for consistency with the other ports, send TEXT event
  88         wxCommandEvent event2( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  89         event2.SetString( combo->GetStringSelection() );
  90         event2.SetEventObject( combo );
  91         combo->GetEventHandler()->ProcessEvent( event2 );
  92     }
  93
  94     // reset the selection flag to value meaning that it is hidden
  95     g_SelectionBeforePopup = wxID_NONE;
  96 }
  97 }
  98
  99 extern "C" {
 100 static void
 101 gtk_popup_show_callback(GtkCombo *WXUNUSED(gtk_combo), wxComboBox *combo)
 102 {
 103     // store the combobox selection value before the popup is shown
 104     g_SelectionBeforePopup = combo->GetCurrentSelection();
 105 }
 106 }
 107
 108 //-----------------------------------------------------------------------------
 109 // "select-child" - click/cursor get select-child, changed, select-child
 110 //-----------------------------------------------------------------------------
 111
 112 extern "C" {
 113 static void
 114 gtk_combo_select_child_callback( GtkList *WXUNUSED(list), GtkWidget *WXUNUSED(widget), wxComboBox *combo )
 115 {
 116     if (g_isIdle) wxapp_install_idle_handler();
 117
 118     if (!combo->m_hasVMT) return;
 119
 120     if (g_blockEventsOnDrag) return;
 121
 122     int curSelection = combo->GetCurrentSelection();
 123
 124     if (combo->m_prevSelection == curSelection) return;
 125
 126     GtkWidget *list = GTK_COMBO(combo->m_widget)->list;
 127     gtk_list_unselect_item( GTK_LIST(list), combo->m_prevSelection );
 128
 129     combo->m_prevSelection = curSelection;
 130
 131     // Quickly set the value of the combo box
 132     // as GTK+ does that only AFTER the event
 133     // is sent.
 134     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(combo->GetHandle())->entry),
 135       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)combo );
 136     combo->SetValue( combo->GetStringSelection() );
 137     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(combo->GetHandle())->entry), "changed",
 138       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)combo );
 139
 140     // throw a SELECTED event only if the combobox popup is hidden (wxID_NONE)
 141     // because when combobox popup is shown, gtk_combo_select_child_callback is
 142     // called each times the mouse is over an item with a pressed button so a lot
 143     // of SELECTED event could be generated if the user keep the mouse button down
 144     // and select other items ...
 145     if (g_SelectionBeforePopup == wxID_NONE)
 146     {
 147         wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
 148         event.SetInt( curSelection );
 149         event.SetString( combo->GetStringSelection() );
 150         event.SetEventObject( combo );
 151         combo->GetEventHandler()->ProcessEvent( event );
 152
 153         // for consistency with the other ports, don't generate text update
 154         // events while the user is browsing the combobox neither
 155         wxCommandEvent event2( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
 156         event2.SetString( combo->GetValue() );
 157         event2.SetEventObject( combo );
 158         combo->GetEventHandler()->ProcessEvent( event2 );
 159     }
 160 }
 161 }
 162
 163 //-----------------------------------------------------------------------------
 164 // wxComboBox
 165 //-----------------------------------------------------------------------------
 166
 167 IMPLEMENT_DYNAMIC_CLASS(wxComboBox,wxControl)
 168
 169 BEGIN_EVENT_TABLE(wxComboBox, wxControl)
 170     EVT_SIZE(wxComboBox::OnSize)
 171     EVT_CHAR(wxComboBox::OnChar)
 172
 173     EVT_MENU(wxID_CUT, wxComboBox::OnCut)
 174     EVT_MENU(wxID_COPY, wxComboBox::OnCopy)
 175     EVT_MENU(wxID_PASTE, wxComboBox::OnPaste)
 176     EVT_MENU(wxID_UNDO, wxComboBox::OnUndo)
 177     EVT_MENU(wxID_REDO, wxComboBox::OnRedo)
 178     EVT_MENU(wxID_CLEAR, wxComboBox::OnDelete)
 179     EVT_MENU(wxID_SELECTALL, wxComboBox::OnSelectAll)
 180
 181     EVT_UPDATE_UI(wxID_CUT, wxComboBox::OnUpdateCut)
 182     EVT_UPDATE_UI(wxID_COPY, wxComboBox::OnUpdateCopy)
 183     EVT_UPDATE_UI(wxID_PASTE, wxComboBox::OnUpdatePaste)
 184     EVT_UPDATE_UI(wxID_UNDO, wxComboBox::OnUpdateUndo)
 185     EVT_UPDATE_UI(wxID_REDO, wxComboBox::OnUpdateRedo)
 186     EVT_UPDATE_UI(wxID_CLEAR, wxComboBox::OnUpdateDelete)
 187     EVT_UPDATE_UI(wxID_SELECTALL, wxComboBox::OnUpdateSelectAll)
 188 END_EVENT_TABLE()
 189
 190 bool wxComboBox::Create( wxWindow *parent, wxWindowID id,
 191                          const wxString& value,
 192                          const wxPoint& pos, const wxSize& size,
 193                          const wxArrayString& choices,
 194                          long style, const wxValidator& validator,
 195                          const wxString& name )
 196 {
 197     wxCArrayString chs(choices);
 198
 199     return Create( parent, id, value, pos, size, chs.GetCount(),
 200                    chs.GetStrings(), style, validator, name );
 201 }
 202
 203 bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
 204                          const wxPoint& pos, const wxSize& size,
 205                          int n, const wxString choices[],
 206                          long style, const wxValidator& validator,
 207                          const wxString& name )
 208 {
 209     m_ignoreNextUpdate = false;
 210     m_needParent = true;
 211     m_acceptsFocus = true;
 212     m_prevSelection = 0;
 213
 214     if (!PreCreation( parent, pos, size ) ||
 215         !CreateBase( parent, id, pos, size, style, validator, name ))
 216     {
 217         wxFAIL_MSG( wxT("wxComboBox creation failed") );
 218         return false;
 219     }
 220
 221     m_widget = gtk_combo_new();
 222     GtkCombo *combo = GTK_COMBO(m_widget);
 223
 224     // Disable GTK's broken events ...
 225     gtk_signal_disconnect( GTK_OBJECT(combo->entry), combo->entry_change_id );
 226     // ... and add surrogate handler.
 227     combo->entry_change_id = gtk_signal_connect (GTK_OBJECT (combo->entry), "changed",
 228                   (GtkSignalFunc) gtk_dummy_callback, combo);
 229
 230     // make it more useable
 231     gtk_combo_set_use_arrows_always( GTK_COMBO(m_widget), TRUE );
 232
 233     // and case-sensitive
 234     gtk_combo_set_case_sensitive( GTK_COMBO(m_widget), TRUE );
 235
 236 #ifdef __WXGTK20__
 237     if (style & wxNO_BORDER)
 238         g_object_set( GTK_ENTRY( combo->entry ), "has-frame", FALSE, NULL );
 239 #endif
 240
 241     GtkWidget *list = GTK_COMBO(m_widget)->list;
 242
 243 #ifndef __WXGTK20__
 244     // gtk_list_set_selection_mode( GTK_LIST(list), GTK_SELECTION_MULTIPLE );
 245 #endif
 246
 247     for (int i = 0; i < n; i++)
 248     {
 249         GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( choices[i] ) );
 250
 251         m_clientDataList.Append( (wxObject*)NULL );
 252         m_clientObjectList.Append( (wxObject*)NULL );
 253
 254         gtk_container_add( GTK_CONTAINER(list), list_item );
 255
 256         gtk_widget_show( list_item );
 257     }
 258
 259     m_parent->DoAddChild( this );
 260
 261     m_focusWidget = combo->entry;
 262
 263     PostCreation(size);
 264
 265     ConnectWidget( combo->button );
 266
 267     // MSW's combo box shows the value and the selection is -1
 268     gtk_entry_set_text( GTK_ENTRY(combo->entry), wxGTK_CONV(value) );
 269     gtk_list_unselect_all( GTK_LIST(combo->list) );
 270
 271     if (style & wxCB_READONLY)
 272         gtk_entry_set_editable( GTK_ENTRY( combo->entry ), FALSE );
 273
 274     // "show" and "hide" events are generated when user click on the combobox button which popups a list
 275     // this list is the "popwin" gtk widget
 276     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "hide",
 277                         GTK_SIGNAL_FUNC(gtk_popup_hide_callback), (gpointer)this );
 278     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "show",
 279                         GTK_SIGNAL_FUNC(gtk_popup_show_callback), (gpointer)this );
 280
 281     gtk_signal_connect_after( GTK_OBJECT(combo->entry), "changed",
 282       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 283
 284     gtk_signal_connect_after( GTK_OBJECT(combo->list), "select-child",
 285       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 286
 287     SetBestSize(size); // need this too because this is a wxControlWithItems
 288
 289     // This is required for tool bar support
 290 //    wxSize setsize = GetSize();
 291 //    gtk_widget_set_usize( m_widget, setsize.x, setsize.y );
 292
 293     return true;
 294 }
 295
 296 wxComboBox::~wxComboBox()
 297 {
 298     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 299     while (node)
 300     {
 301         wxClientData *cd = (wxClientData*)node->GetData();
 302         if (cd) delete cd;
 303         node = node->GetNext();
 304     }
 305     m_clientObjectList.Clear();
 306
 307     m_clientDataList.Clear();
 308 }
 309
 310 void wxComboBox::SetFocus()
 311 {
 312     if ( m_hasFocus )
 313     {
 314         // don't do anything if we already have focus
 315         return;
 316     }
 317
 318     gtk_widget_grab_focus( m_focusWidget );
 319 }
 320
 321 int wxComboBox::DoAppend( const wxString &item )
 322 {
 323     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 324
 325     DisableEvents();
 326
 327     GtkWidget *list = GTK_COMBO(m_widget)->list;
 328
 329     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 330
 331     gtk_container_add( GTK_CONTAINER(list), list_item );
 332
 333     if (GTK_WIDGET_REALIZED(m_widget))
 334     {
 335         gtk_widget_realize( list_item );
 336         gtk_widget_realize( GTK_BIN(list_item)->child );
 337     }
 338
 339     // Apply current widget style to the new list_item
 340     GtkRcStyle *style = CreateWidgetStyle();
 341     if (style)
 342     {
 343         gtk_widget_modify_style( GTK_WIDGET( list_item ), style );
 344         GtkBin *bin = GTK_BIN( list_item );
 345         GtkWidget *label = GTK_WIDGET( bin->child );
 346         gtk_widget_modify_style( label, style );
 347         gtk_rc_style_unref( style );
 348     }
 349
 350     gtk_widget_show( list_item );
 351
 352     const int count = GetCount();
 353
 354     if ( (int)m_clientDataList.GetCount() < count )
 355         m_clientDataList.Append( (wxObject*) NULL );
 356     if ( (int)m_clientObjectList.GetCount() < count )
 357         m_clientObjectList.Append( (wxObject*) NULL );
 358
 359     EnableEvents();
 360
 361     InvalidateBestSize();
 362
 363     return count - 1;
 364 }
 365
 366 int wxComboBox::DoInsert( const wxString &item, int pos )
 367 {
 368     wxCHECK_MSG( !(GetWindowStyle() & wxCB_SORT), -1,
 369                     wxT("can't insert into sorted list"));
 370
 371     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 372
 373     int count = GetCount();
 374     wxCHECK_MSG( (pos >= 0) && (pos <= count), -1, wxT("invalid index") );
 375
 376     if (pos == count)
 377         return Append(item);
 378
 379     DisableEvents();
 380
 381     GtkWidget *list = GTK_COMBO(m_widget)->list;
 382
 383     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 384
 385     GList *gitem_list = g_list_alloc ();
 386     gitem_list->data = list_item;
 387     gtk_list_insert_items( GTK_LIST (list), gitem_list, pos );
 388
 389     if (GTK_WIDGET_REALIZED(m_widget))
 390     {
 391         gtk_widget_realize( list_item );
 392         gtk_widget_realize( GTK_BIN(list_item)->child );
 393
 394         ApplyWidgetStyle();
 395     }
 396
 397     gtk_widget_show( list_item );
 398
 399     count = GetCount();
 400
 401     if ( (int)m_clientDataList.GetCount() < count )
 402         m_clientDataList.Insert( pos, (wxObject*) NULL );
 403     if ( (int)m_clientObjectList.GetCount() < count )
 404         m_clientObjectList.Insert( pos, (wxObject*) NULL );
 405
 406     EnableEvents();
 407
 408     InvalidateBestSize();
 409
 410     return pos;
 411 }
 412
 413 void wxComboBox::DoSetItemClientData( int n, void* clientData )
 414 {
 415     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 416
 417     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 418     if (!node) return;
 419
 420     node->SetData( (wxObject*) clientData );
 421 }
 422
 423 void* wxComboBox::DoGetItemClientData( int n ) const
 424 {
 425     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 426
 427     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 428
 429     return node ? node->GetData() : NULL;
 430 }
 431
 432 void wxComboBox::DoSetItemClientObject( int n, wxClientData* clientData )
 433 {
 434     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 435
 436     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 437     if (!node) return;
 438
 439     // wxItemContainer already deletes data for us
 440
 441     node->SetData( (wxObject*) clientData );
 442 }
 443
 444 wxClientData* wxComboBox::DoGetItemClientObject( int n ) const
 445 {
 446     wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, wxT("invalid combobox") );
 447
 448     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 449
 450     return node ? (wxClientData*) node->GetData() : NULL;
 451 }
 452
 453 void wxComboBox::Clear()
 454 {
 455     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 456
 457     DisableEvents();
 458
 459     GtkWidget *list = GTK_COMBO(m_widget)->list;
 460     gtk_list_clear_items( GTK_LIST(list), 0, GetCount() );
 461
 462     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 463     while (node)
 464     {
 465         wxClientData *cd = (wxClientData*)node->GetData();
 466         if (cd) delete cd;
 467         node = node->GetNext();
 468     }
 469     m_clientObjectList.Clear();
 470
 471     m_clientDataList.Clear();
 472
 473     EnableEvents();
 474
 475     InvalidateBestSize();
 476 }
 477
 478 void wxComboBox::Delete( int n )
 479 {
 480     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 481
 482     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 483
 484     GList *child = g_list_nth( listbox->children, n );
 485
 486     if (!child)
 487     {
 488         wxFAIL_MSG(wxT("wrong index"));
 489         return;
 490     }
 491
 492     DisableEvents();
 493
 494     GList *list = g_list_append( (GList*) NULL, child->data );
 495     gtk_list_remove_items( listbox, list );
 496     g_list_free( list );
 497
 498     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 499     if (node)
 500     {
 501         wxClientData *cd = (wxClientData*)node->GetData();
 502         if (cd) delete cd;
 503         m_clientObjectList.Erase( node );
 504     }
 505
 506     node = m_clientDataList.Item( n );
 507     if (node)
 508         m_clientDataList.Erase( node );
 509
 510     EnableEvents();
 511
 512     InvalidateBestSize();
 513 }
 514
 515 void wxComboBox::SetString(int n, const wxString &text)
 516 {
 517     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 518
 519     GtkWidget *list = GTK_COMBO(m_widget)->list;
 520
 521     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 522     if (child)
 523     {
 524         GtkBin *bin = GTK_BIN( child->data );
 525         GtkLabel *label = GTK_LABEL( bin->child );
 526         gtk_label_set_text(label, wxGTK_CONV(text));
 527     }
 528     else
 529     {
 530         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 531     }
 532
 533     InvalidateBestSize();
 534 }
 535
 536 int wxComboBox::FindString( const wxString &item, bool bCase ) const
 537 {
 538     wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid combobox") );
 539
 540     GtkWidget *list = GTK_COMBO(m_widget)->list;
 541
 542     GList *child = GTK_LIST(list)->children;
 543     int count = 0;
 544     while (child)
 545     {
 546         GtkBin *bin = GTK_BIN( child->data );
 547         GtkLabel *label = GTK_LABEL( bin->child );
 548 #ifdef __WXGTK20__
 549         wxString str( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 550 #else
 551         wxString str( label->label );
 552 #endif
 553         if (item.IsSameAs( str , bCase ) )
 554             return count;
 555
 556         count++;
 557         child = child->next;
 558     }
 559
 560     return wxNOT_FOUND;
 561 }
 562
 563 int wxComboBox::GetSelection() const
 564 {
 565     // if the popup is currently opened, use the selection as it had been
 566     // before it dropped down
 567     return g_SelectionBeforePopup == wxID_NONE ? GetCurrentSelection()
 568                                                : g_SelectionBeforePopup;
 569 }
 570
 571 int wxComboBox::GetCurrentSelection() const
 572 {
 573     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 574
 575     GtkWidget *list = GTK_COMBO(m_widget)->list;
 576
 577     GList *selection = GTK_LIST(list)->selection;
 578     if (selection)
 579     {
 580         GList *child = GTK_LIST(list)->children;
 581         int count = 0;
 582         while (child)
 583         {
 584             if (child->data == selection->data) return count;
 585             count++;
 586             child = child->next;
 587         }
 588     }
 589
 590     return -1;
 591 }
 592
 593 wxString wxComboBox::GetString( int n ) const
 594 {
 595     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 596
 597     GtkWidget *list = GTK_COMBO(m_widget)->list;
 598
 599     wxString str;
 600     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 601     if (child)
 602     {
 603         GtkBin *bin = GTK_BIN( child->data );
 604         GtkLabel *label = GTK_LABEL( bin->child );
 605 #ifdef __WXGTK20__
 606         str = wxGTK_CONV_BACK( gtk_label_get_text(label) );
 607 #else
 608         str = wxString( label->label );
 609 #endif
 610     }
 611     else
 612     {
 613         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 614     }
 615
 616     return str;
 617 }
 618
 619 wxString wxComboBox::GetStringSelection() const
 620 {
 621     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 622
 623     GtkWidget *list = GTK_COMBO(m_widget)->list;
 624
 625     GList *selection = GTK_LIST(list)->selection;
 626     if (selection)
 627     {
 628         GtkBin *bin = GTK_BIN( selection->data );
 629         GtkLabel *label = GTK_LABEL( bin->child );
 630 #ifdef __WXGTK20__
 631         wxString tmp( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 632 #else
 633         wxString tmp( label->label );
 634 #endif
 635         return tmp;
 636     }
 637
 638     wxFAIL_MSG( wxT("wxComboBox: no selection") );
 639
 640     return wxEmptyString;
 641 }
 642
 643 int wxComboBox::GetCount() const
 644 {
 645     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 646
 647     GtkWidget *list = GTK_COMBO(m_widget)->list;
 648
 649     GList *child = GTK_LIST(list)->children;
 650     int count = 0;
 651     while (child) { count++; child = child->next; }
 652     return count;
 653 }
 654
 655 void wxComboBox::SetSelection( int n )
 656 {
 657     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 658
 659     DisableEvents();
 660
 661     GtkWidget *list = GTK_COMBO(m_widget)->list;
 662     gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 663     gtk_list_select_item( GTK_LIST(list), n );
 664     m_prevSelection = n;
 665
 666     EnableEvents();
 667 }
 668
 669 wxString wxComboBox::GetValue() const
 670 {
 671     GtkEntry *entry = GTK_ENTRY( GTK_COMBO(m_widget)->entry );
 672     wxString tmp( wxGTK_CONV_BACK( gtk_entry_get_text( entry ) ) );
 673
 674 #if 0
 675     for (int i = 0; i < wxStrlen(tmp.c_str()) +1; i++)
 676     {
 677         wxChar c = tmp[i];
 678         printf( "%d ", (int) (c) );
 679     }
 680     printf( "\n" );
 681 #endif
 682
 683     return tmp;
 684 }
 685
 686 void wxComboBox::SetValue( const wxString& value )
 687 {
 688     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 689
 690     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 691     wxString tmp;
 692     if (!value.IsNull()) tmp = value;
 693     gtk_entry_set_text( GTK_ENTRY(entry), wxGTK_CONV( tmp ) );
 694
 695     InvalidateBestSize();
 696 }
 697
 698 void wxComboBox::Copy()
 699 {
 700     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 701
 702     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 703     gtk_editable_copy_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 704 }
 705
 706 void wxComboBox::Cut()
 707 {
 708     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 709
 710     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 711     gtk_editable_cut_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 712 }
 713
 714 void wxComboBox::Paste()
 715 {
 716     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 717
 718     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 719     gtk_editable_paste_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG);
 720 }
 721
 722 void wxComboBox::Undo()
 723 {
 724     // TODO
 725 }
 726
 727 void wxComboBox::Redo()
 728 {
 729     // TODO
 730 }
 731
 732 void wxComboBox::SelectAll()
 733 {
 734     SetSelection(0, GetLastPosition());
 735 }
 736
 737 bool wxComboBox::CanUndo() const
 738 {
 739     // TODO
 740     return false;
 741 }
 742
 743 bool wxComboBox::CanRedo() const
 744 {
 745     // TODO
 746     return false;
 747 }
 748
 749 bool wxComboBox::HasSelection() const
 750 {
 751     long from, to;
 752     GetSelection(&from, &to);
 753     return from != to;
 754 }
 755
 756 bool wxComboBox::CanCopy() const
 757 {
 758     // Can copy if there's a selection
 759     return HasSelection();
 760 }
 761
 762 bool wxComboBox::CanCut() const
 763 {
 764     return CanCopy() && IsEditable();
 765 }
 766
 767 bool wxComboBox::CanPaste() const
 768 {
 769     // TODO: check for text on the clipboard
 770     return IsEditable() ;
 771 }
 772
 773 bool wxComboBox::IsEditable() const
 774 {
 775     return !HasFlag(wxCB_READONLY);
 776 }
 777
 778
 779 void wxComboBox::SetInsertionPoint( long pos )
 780 {
 781     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 782
 783     if ( pos == GetLastPosition() )
 784         pos = -1;
 785
 786     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 787     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
 788 }
 789
 790 long wxComboBox::GetInsertionPoint() const
 791 {
 792     return (long) GET_EDITABLE_POS( GTK_COMBO(m_widget)->entry );
 793 }
 794
 795 wxTextPos wxComboBox::GetLastPosition() const
 796 {
 797     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 798     int pos = GTK_ENTRY(entry)->text_length;
 799     return (long) pos-1;
 800 }
 801
 802 void wxComboBox::Replace( long from, long to, const wxString& value )
 803 {
 804     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 805
 806     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 807     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 808     if (value.IsNull()) return;
 809     gint pos = (gint)to;
 810
 811 #if wxUSE_UNICODE
 812     wxCharBuffer buffer = wxConvUTF8.cWX2MB( value );
 813     gtk_editable_insert_text( GTK_EDITABLE(entry), (const char*) buffer, strlen( (const char*) buffer ), &pos );
 814 #else
 815     gtk_editable_insert_text( GTK_EDITABLE(entry), value.c_str(), value.Length(), &pos );
 816 #endif
 817 }
 818
 819 void wxComboBox::SetSelection( long from, long to )
 820 {
 821     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 822     gtk_editable_select_region( GTK_EDITABLE(entry), (gint)from, (gint)to );
 823 }
 824
 825 void wxComboBox::GetSelection( long* from, long* to ) const
 826 {
 827     if (IsEditable())
 828     {
 829         GtkEditable *editable = GTK_EDITABLE(GTK_COMBO(m_widget)->entry);
 830 #ifdef __WXGTK20__
 831         gint start, end;
 832         gtk_editable_get_selection_bounds(editable, & start, & end);
 833         *from = start;
 834         *to = end;
 835 #else
 836         *from = (long) editable->selection_start_pos;
 837         *to = (long) editable->selection_end_pos;
 838 #endif
 839     }
 840 }
 841
 842 void wxComboBox::SetEditable( bool editable )
 843 {
 844     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 845     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 846 }
 847
 848 void wxComboBox::OnChar( wxKeyEvent &event )
 849 {
 850     if ( event.GetKeyCode() == WXK_RETURN )
 851     {
 852         // GTK automatically selects an item if its in the list
 853         wxCommandEvent eventEnter(wxEVT_COMMAND_TEXT_ENTER, GetId());
 854         eventEnter.SetString( GetValue() );
 855         eventEnter.SetInt( GetSelection() );
 856         eventEnter.SetEventObject( this );
 857
 858         if (!GetEventHandler()->ProcessEvent( eventEnter ))
 859         {
 860             // This will invoke the dialog default action, such
 861             // as the clicking the default button.
 862
 863             wxWindow *top_frame = m_parent;
 864             while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 865                 top_frame = top_frame->GetParent();
 866
 867             if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 868             {
 869                 GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 870
 871                 if (window->default_widget)
 872                         gtk_widget_activate (window->default_widget);
 873             }
 874         }
 875
 876         // Catch GTK event so that GTK doesn't open the drop
 877         // down list upon RETURN.
 878         return;
 879     }
 880
 881     event.Skip();
 882 }
 883
 884 void wxComboBox::DisableEvents()
 885 {
 886     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->list),
 887       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 888     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->entry),
 889       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 890 }
 891
 892 void wxComboBox::EnableEvents()
 893 {
 894     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(m_widget)->list), "select-child",
 895       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 896     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
 897       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 898 }
 899
 900 void wxComboBox::OnSize( wxSizeEvent &event )
 901 {
 902     // NB: In some situations (e.g. on non-first page of a wizard, if the
 903     //     size used is default size), GtkCombo widget is resized correctly,
 904     //     but it's look is not updated, it's rendered as if it was much wider.
 905     //     No other widgets are affected, so it looks like a bug in GTK+.
 906     //     Manually requesting resize calculation (as gtk_pizza_set_size does)
 907     //     fixes it.
 908     if (GTK_WIDGET_VISIBLE(m_widget))
 909         gtk_widget_queue_resize(m_widget);
 910
 911     event.Skip();
 912 }
 913
 914 void wxComboBox::DoApplyWidgetStyle(GtkRcStyle *style)
 915 {
 916 //    gtk_widget_modify_style( GTK_COMBO(m_widget)->button, syle );
 917
 918     gtk_widget_modify_style( GTK_COMBO(m_widget)->entry, style );
 919     gtk_widget_modify_style( GTK_COMBO(m_widget)->list, style );
 920
 921     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 922     GList *child = list->children;
 923     while (child)
 924     {
 925         gtk_widget_modify_style( GTK_WIDGET(child->data), style );
 926
 927         GtkBin *bin = GTK_BIN(child->data);
 928         gtk_widget_modify_style( bin->child, style );
 929
 930         child = child->next;
 931     }
 932 }
 933
 934 GtkWidget* wxComboBox::GetConnectWidget()
 935 {
 936     return GTK_COMBO(m_widget)->entry;
 937 }
 938
 939 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 940 {
 941     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 942              (window == GTK_COMBO(m_widget)->button->window ) );
 943 }
 944
 945 wxSize wxComboBox::DoGetBestSize() const
 946 {
 947     wxSize ret( wxControl::DoGetBestSize() );
 948
 949     // we know better our horizontal extent: it depends on the longest string
 950     // in the combobox
 951     if ( m_widget )
 952     {
 953         int width;
 954         size_t count = GetCount();
 955         for ( size_t n = 0; n < count; n++ )
 956         {
 957             GetTextExtent( GetString(n), &width, NULL, NULL, NULL );
 958             if ( width > ret.x )
 959                 ret.x = width;
 960         }
 961     }
 962
 963     // empty combobox should have some reasonable default size too
 964     if ( ret.x < 100 )
 965         ret.x = 100;
 966
 967     CacheBestSize(ret);
 968     return ret;
 969 }
 970
 971 // static
 972 wxVisualAttributes
 973 wxComboBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 974 {
 975     return GetDefaultAttributesFromGTKWidget(gtk_combo_new, true);
 976 }
 977
 978 // ----------------------------------------------------------------------------
 979 // standard event handling
 980 // ----------------------------------------------------------------------------
 981
 982 void wxComboBox::OnCut(wxCommandEvent& WXUNUSED(event))
 983 {
 984     Cut();
 985 }
 986
 987 void wxComboBox::OnCopy(wxCommandEvent& WXUNUSED(event))
 988 {
 989     Copy();
 990 }
 991
 992 void wxComboBox::OnPaste(wxCommandEvent& WXUNUSED(event))
 993 {
 994     Paste();
 995 }
 996
 997 void wxComboBox::OnUndo(wxCommandEvent& WXUNUSED(event))
 998 {
 999     Undo();
1000 }
1001
1002 void wxComboBox::OnRedo(wxCommandEvent& WXUNUSED(event))
1003 {
1004     Redo();
1005 }
1006
1007 void wxComboBox::OnDelete(wxCommandEvent& WXUNUSED(event))
1008 {
1009     long from, to;
1010     GetSelection(& from, & to);
1011     if (from != -1 && to != -1)
1012         Remove(from, to);
1013 }
1014
1015 void wxComboBox::OnSelectAll(wxCommandEvent& WXUNUSED(event))
1016 {
1017     SetSelection(-1, -1);
1018 }
1019
1020 void wxComboBox::OnUpdateCut(wxUpdateUIEvent& event)
1021 {
1022     event.Enable( CanCut() );
1023 }
1024
1025 void wxComboBox::OnUpdateCopy(wxUpdateUIEvent& event)
1026 {
1027     event.Enable( CanCopy() );
1028 }
1029
1030 void wxComboBox::OnUpdatePaste(wxUpdateUIEvent& event)
1031 {
1032     event.Enable( CanPaste() );
1033 }
1034
1035 void wxComboBox::OnUpdateUndo(wxUpdateUIEvent& event)
1036 {
1037     event.Enable( CanUndo() );
1038 }
1039
1040 void wxComboBox::OnUpdateRedo(wxUpdateUIEvent& event)
1041 {
1042     event.Enable( CanRedo() );
1043 }
1044
1045 void wxComboBox::OnUpdateDelete(wxUpdateUIEvent& event)
1046 {
1047     event.Enable(HasSelection() && IsEditable()) ;
1048 }
1049
1050 void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event)
1051 {
1052     event.Enable(GetLastPosition() > 0);
1053 }
1054
1055 #endif