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 #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/gtk1/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     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(combo->GetHandle())->entry),
 140       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)combo );
 141     combo->SetValue( combo->GetStringSelection() );
 142     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(combo->GetHandle())->entry), "changed",
 143       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)combo );
 144
 145     // throw a SELECTED event only if the combobox popup is hidden (wxID_NONE)
 146     // because when combobox popup is shown, gtk_combo_select_child_callback is
 147     // called each times the mouse is over an item with a pressed button so a lot
 148     // of SELECTED event could be generated if the user keep the mouse button down
 149     // and select other items ...
 150     if (g_SelectionBeforePopup == wxID_NONE)
 151     {
 152         wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
 153         event.SetInt( curSelection );
 154         event.SetString( combo->GetStringSelection() );
 155         event.SetEventObject( combo );
 156         combo->GetEventHandler()->ProcessEvent( event );
 157
 158         // for consistency with the other ports, don't generate text update
 159         // events while the user is browsing the combobox neither
 160         wxCommandEvent event2( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
 161         event2.SetString( combo->GetValue() );
 162         event2.SetEventObject( combo );
 163         combo->GetEventHandler()->ProcessEvent( event2 );
 164     }
 165 }
 166 }
 167
 168 //-----------------------------------------------------------------------------
 169 // wxComboBox
 170 //-----------------------------------------------------------------------------
 171
 172 IMPLEMENT_DYNAMIC_CLASS(wxComboBox,wxControl)
 173
 174 BEGIN_EVENT_TABLE(wxComboBox, wxControl)
 175     EVT_SIZE(wxComboBox::OnSize)
 176     EVT_CHAR(wxComboBox::OnChar)
 177
 178     EVT_MENU(wxID_CUT, wxComboBox::OnCut)
 179     EVT_MENU(wxID_COPY, wxComboBox::OnCopy)
 180     EVT_MENU(wxID_PASTE, wxComboBox::OnPaste)
 181     EVT_MENU(wxID_UNDO, wxComboBox::OnUndo)
 182     EVT_MENU(wxID_REDO, wxComboBox::OnRedo)
 183     EVT_MENU(wxID_CLEAR, wxComboBox::OnDelete)
 184     EVT_MENU(wxID_SELECTALL, wxComboBox::OnSelectAll)
 185
 186     EVT_UPDATE_UI(wxID_CUT, wxComboBox::OnUpdateCut)
 187     EVT_UPDATE_UI(wxID_COPY, wxComboBox::OnUpdateCopy)
 188     EVT_UPDATE_UI(wxID_PASTE, wxComboBox::OnUpdatePaste)
 189     EVT_UPDATE_UI(wxID_UNDO, wxComboBox::OnUpdateUndo)
 190     EVT_UPDATE_UI(wxID_REDO, wxComboBox::OnUpdateRedo)
 191     EVT_UPDATE_UI(wxID_CLEAR, wxComboBox::OnUpdateDelete)
 192     EVT_UPDATE_UI(wxID_SELECTALL, wxComboBox::OnUpdateSelectAll)
 193 END_EVENT_TABLE()
 194
 195 bool wxComboBox::Create( wxWindow *parent, wxWindowID id,
 196                          const wxString& value,
 197                          const wxPoint& pos, const wxSize& size,
 198                          const wxArrayString& choices,
 199                          long style, const wxValidator& validator,
 200                          const wxString& name )
 201 {
 202     wxCArrayString chs(choices);
 203
 204     return Create( parent, id, value, pos, size, chs.GetCount(),
 205                    chs.GetStrings(), style, validator, name );
 206 }
 207
 208 bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
 209                          const wxPoint& pos, const wxSize& size,
 210                          int n, const wxString choices[],
 211                          long style, const wxValidator& validator,
 212                          const wxString& name )
 213 {
 214     m_ignoreNextUpdate = false;
 215     m_needParent = true;
 216     m_acceptsFocus = true;
 217     m_prevSelection = 0;
 218
 219     if (!PreCreation( parent, pos, size ) ||
 220         !CreateBase( parent, id, pos, size, style, validator, name ))
 221     {
 222         wxFAIL_MSG( wxT("wxComboBox creation failed") );
 223         return false;
 224     }
 225
 226     m_widget = gtk_combo_new();
 227     GtkCombo *combo = GTK_COMBO(m_widget);
 228
 229     // Disable GTK's broken events ...
 230     gtk_signal_disconnect( GTK_OBJECT(combo->entry), combo->entry_change_id );
 231     // ... and add surrogate handler.
 232     combo->entry_change_id = gtk_signal_connect (GTK_OBJECT (combo->entry), "changed",
 233                   (GtkSignalFunc) gtk_dummy_callback, combo);
 234
 235     // make it more useable
 236     gtk_combo_set_use_arrows_always( GTK_COMBO(m_widget), TRUE );
 237
 238     // and case-sensitive
 239     gtk_combo_set_case_sensitive( GTK_COMBO(m_widget), TRUE );
 240
 241     GtkWidget *list = GTK_COMBO(m_widget)->list;
 242
 243     // gtk_list_set_selection_mode( GTK_LIST(list), GTK_SELECTION_MULTIPLE );
 244
 245     for (int i = 0; i < n; i++)
 246     {
 247         GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( choices[i] ) );
 248
 249         m_clientDataList.Append( (wxObject*)NULL );
 250         m_clientObjectList.Append( (wxObject*)NULL );
 251
 252         gtk_container_add( GTK_CONTAINER(list), list_item );
 253
 254         gtk_widget_show( list_item );
 255     }
 256
 257     m_parent->DoAddChild( this );
 258
 259     m_focusWidget = combo->entry;
 260
 261     PostCreation(size);
 262
 263     ConnectWidget( combo->button );
 264
 265     // MSW's combo box shows the value and the selection is -1
 266     gtk_entry_set_text( GTK_ENTRY(combo->entry), wxGTK_CONV(value) );
 267     gtk_list_unselect_all( GTK_LIST(combo->list) );
 268
 269     if (style & wxCB_READONLY)
 270         gtk_entry_set_editable( GTK_ENTRY( combo->entry ), FALSE );
 271
 272     // "show" and "hide" events are generated when user click on the combobox button which popups a list
 273     // this list is the "popwin" gtk widget
 274     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "hide",
 275                         GTK_SIGNAL_FUNC(gtk_popup_hide_callback), (gpointer)this );
 276     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "show",
 277                         GTK_SIGNAL_FUNC(gtk_popup_show_callback), (gpointer)this );
 278
 279     gtk_signal_connect_after( GTK_OBJECT(combo->entry), "changed",
 280       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 281
 282     gtk_signal_connect_after( GTK_OBJECT(combo->list), "select-child",
 283       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 284
 285     SetBestSize(size); // need this too because this is a wxControlWithItems
 286
 287     // This is required for tool bar support
 288 //    wxSize setsize = GetSize();
 289 //    gtk_widget_set_usize( m_widget, setsize.x, setsize.y );
 290
 291     return true;
 292 }
 293
 294 wxComboBox::~wxComboBox()
 295 {
 296     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 297     while (node)
 298     {
 299         wxClientData *cd = (wxClientData*)node->GetData();
 300         if (cd) delete cd;
 301         node = node->GetNext();
 302     }
 303     m_clientObjectList.Clear();
 304
 305     m_clientDataList.Clear();
 306 }
 307
 308 void wxComboBox::SetFocus()
 309 {
 310     if ( m_hasFocus )
 311     {
 312         // don't do anything if we already have focus
 313         return;
 314     }
 315
 316     gtk_widget_grab_focus( m_focusWidget );
 317 }
 318
 319 int wxComboBox::DoAppend( const wxString &item )
 320 {
 321     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 322
 323     DisableEvents();
 324
 325     GtkWidget *list = GTK_COMBO(m_widget)->list;
 326
 327     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 328
 329     gtk_container_add( GTK_CONTAINER(list), list_item );
 330
 331     if (GTK_WIDGET_REALIZED(m_widget))
 332     {
 333         gtk_widget_realize( list_item );
 334         gtk_widget_realize( GTK_BIN(list_item)->child );
 335     }
 336
 337     // Apply current widget style to the new list_item
 338     GtkRcStyle *style = CreateWidgetStyle();
 339     if (style)
 340     {
 341         gtk_widget_modify_style( GTK_WIDGET( list_item ), style );
 342         GtkBin *bin = GTK_BIN( list_item );
 343         GtkWidget *label = GTK_WIDGET( bin->child );
 344         gtk_widget_modify_style( label, style );
 345         gtk_rc_style_unref( style );
 346     }
 347
 348     gtk_widget_show( list_item );
 349
 350     const unsigned int count = GetCount();
 351
 352     if ( m_clientDataList.GetCount() < count )
 353         m_clientDataList.Append( (wxObject*) NULL );
 354     if ( m_clientObjectList.GetCount() < count )
 355         m_clientObjectList.Append( (wxObject*) NULL );
 356
 357     EnableEvents();
 358
 359     InvalidateBestSize();
 360
 361     return count - 1;
 362 }
 363
 364 int wxComboBox::DoInsert( const wxString &item, unsigned int pos )
 365 {
 366     wxCHECK_MSG( !(GetWindowStyle() & wxCB_SORT), -1,
 367                     wxT("can't insert into sorted list"));
 368
 369     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 370
 371     wxCHECK_MSG( IsValidInsert(pos), -1, wxT("invalid index") );
 372
 373     if (pos == GetCount())
 374         return Append(item);
 375
 376     DisableEvents();
 377
 378     GtkWidget *list = GTK_COMBO(m_widget)->list;
 379
 380     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 381
 382     GList *gitem_list = g_list_alloc ();
 383     gitem_list->data = list_item;
 384     gtk_list_insert_items( GTK_LIST (list), gitem_list, pos );
 385
 386     if (GTK_WIDGET_REALIZED(m_widget))
 387     {
 388         gtk_widget_realize( list_item );
 389         gtk_widget_realize( GTK_BIN(list_item)->child );
 390
 391         ApplyWidgetStyle();
 392     }
 393
 394     gtk_widget_show( list_item );
 395
 396     const unsigned int count = GetCount();
 397
 398     if ( m_clientDataList.GetCount() < count )
 399         m_clientDataList.Insert( pos, (wxObject*) NULL );
 400     if ( m_clientObjectList.GetCount() < count )
 401         m_clientObjectList.Insert( pos, (wxObject*) NULL );
 402
 403     EnableEvents();
 404
 405     InvalidateBestSize();
 406
 407     return pos;
 408 }
 409
 410 void wxComboBox::DoSetItemClientData(unsigned int n, void* clientData)
 411 {
 412     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 413
 414     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 415     if (!node) return;
 416
 417     node->SetData( (wxObject*) clientData );
 418 }
 419
 420 void* wxComboBox::DoGetItemClientData(unsigned int n) const
 421 {
 422     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 423
 424     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 425
 426     return node ? node->GetData() : NULL;
 427 }
 428
 429 void wxComboBox::DoSetItemClientObject(unsigned int n, wxClientData* clientData)
 430 {
 431     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 432
 433     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 434     if (!node) return;
 435
 436     // wxItemContainer already deletes data for us
 437
 438     node->SetData( (wxObject*) clientData );
 439 }
 440
 441 wxClientData* wxComboBox::DoGetItemClientObject(unsigned int n) const
 442 {
 443     wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, wxT("invalid combobox") );
 444
 445     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 446
 447     return node ? (wxClientData*) node->GetData() : NULL;
 448 }
 449
 450 void wxComboBox::Clear()
 451 {
 452     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 453
 454     DisableEvents();
 455
 456     GtkWidget *list = GTK_COMBO(m_widget)->list;
 457     gtk_list_clear_items( GTK_LIST(list), 0, (int)GetCount() );
 458
 459     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 460     while (node)
 461     {
 462         wxClientData *cd = (wxClientData*)node->GetData();
 463         if (cd) delete cd;
 464         node = node->GetNext();
 465     }
 466     m_clientObjectList.Clear();
 467
 468     m_clientDataList.Clear();
 469
 470     EnableEvents();
 471
 472     InvalidateBestSize();
 473 }
 474
 475 void wxComboBox::Delete(unsigned int n)
 476 {
 477     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 478
 479     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 480
 481     GList *child = g_list_nth( listbox->children, n );
 482
 483     if (!child)
 484     {
 485         wxFAIL_MSG(wxT("wrong index"));
 486         return;
 487     }
 488
 489     DisableEvents();
 490
 491     GList *list = g_list_append( (GList*) NULL, child->data );
 492     gtk_list_remove_items( listbox, list );
 493     g_list_free( list );
 494
 495     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 496     if (node)
 497     {
 498         wxClientData *cd = (wxClientData*)node->GetData();
 499         if (cd) delete cd;
 500         m_clientObjectList.Erase( node );
 501     }
 502
 503     node = m_clientDataList.Item( n );
 504     if (node)
 505         m_clientDataList.Erase( node );
 506
 507     EnableEvents();
 508
 509     InvalidateBestSize();
 510 }
 511
 512 void wxComboBox::SetString(unsigned int n, const wxString &text)
 513 {
 514     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 515
 516     GtkWidget *list = GTK_COMBO(m_widget)->list;
 517
 518     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 519     if (child)
 520     {
 521         GtkBin *bin = GTK_BIN( child->data );
 522         GtkLabel *label = GTK_LABEL( bin->child );
 523         gtk_label_set_text(label, wxGTK_CONV(text));
 524     }
 525     else
 526     {
 527         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 528     }
 529
 530     InvalidateBestSize();
 531 }
 532
 533 int wxComboBox::FindString( const wxString &item, bool bCase ) const
 534 {
 535     wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid combobox") );
 536
 537     GtkWidget *list = GTK_COMBO(m_widget)->list;
 538
 539     GList *child = GTK_LIST(list)->children;
 540     int count = 0;
 541     while (child)
 542     {
 543         GtkBin *bin = GTK_BIN( child->data );
 544         GtkLabel *label = GTK_LABEL( bin->child );
 545         wxString str( label->label );
 546         if (item.IsSameAs( str , bCase ) )
 547             return count;
 548
 549         count++;
 550         child = child->next;
 551     }
 552
 553     return wxNOT_FOUND;
 554 }
 555
 556 int wxComboBox::GetSelection() const
 557 {
 558     // if the popup is currently opened, use the selection as it had been
 559     // before it dropped down
 560     return g_SelectionBeforePopup == wxID_NONE ? GetCurrentSelection()
 561                                                : g_SelectionBeforePopup;
 562 }
 563
 564 int wxComboBox::GetCurrentSelection() const
 565 {
 566     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 567
 568     GtkWidget *list = GTK_COMBO(m_widget)->list;
 569
 570     GList *selection = GTK_LIST(list)->selection;
 571     if (selection)
 572     {
 573         GList *child = GTK_LIST(list)->children;
 574         int count = 0;
 575         while (child)
 576         {
 577             if (child->data == selection->data) return count;
 578             count++;
 579             child = child->next;
 580         }
 581     }
 582
 583     return wxNOT_FOUND;
 584 }
 585
 586 wxString wxComboBox::GetString(unsigned int n) const
 587 {
 588     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 589
 590     GtkWidget *list = GTK_COMBO(m_widget)->list;
 591
 592     wxString str;
 593     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 594     if (child)
 595     {
 596         GtkBin *bin = GTK_BIN( child->data );
 597         GtkLabel *label = GTK_LABEL( bin->child );
 598         str = wxString( label->label );
 599     }
 600     else
 601     {
 602         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 603     }
 604
 605     return str;
 606 }
 607
 608 wxString wxComboBox::GetStringSelection() const
 609 {
 610     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 611
 612     GtkWidget *list = GTK_COMBO(m_widget)->list;
 613
 614     GList *selection = GTK_LIST(list)->selection;
 615     if (selection)
 616     {
 617         GtkBin *bin = GTK_BIN( selection->data );
 618         GtkLabel *label = GTK_LABEL( bin->child );
 619         wxString tmp( label->label );
 620         return tmp;
 621     }
 622
 623     wxFAIL_MSG( wxT("wxComboBox: no selection") );
 624
 625     return wxEmptyString;
 626 }
 627
 628 unsigned int wxComboBox::GetCount() const
 629 {
 630     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 631
 632     GtkWidget *list = GTK_COMBO(m_widget)->list;
 633
 634     GList *child = GTK_LIST(list)->children;
 635     unsigned int count = 0;
 636     while (child) { count++; child = child->next; }
 637     return count;
 638 }
 639
 640 void wxComboBox::SetSelection( int n )
 641 {
 642     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 643
 644     DisableEvents();
 645
 646     GtkWidget *list = GTK_COMBO(m_widget)->list;
 647     gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 648     gtk_list_select_item( GTK_LIST(list), n );
 649     m_prevSelection = n;
 650
 651     EnableEvents();
 652 }
 653
 654 wxString wxComboBox::GetValue() const
 655 {
 656     GtkEntry *entry = GTK_ENTRY( GTK_COMBO(m_widget)->entry );
 657     wxString tmp( wxGTK_CONV_BACK( gtk_entry_get_text( entry ) ) );
 658
 659 #if 0
 660     for (int i = 0; i < wxStrlen(tmp.c_str()) +1; i++)
 661     {
 662         wxChar c = tmp[i];
 663         printf( "%d ", (int) (c) );
 664     }
 665     printf( "\n" );
 666 #endif
 667
 668     return tmp;
 669 }
 670
 671 void wxComboBox::SetValue( const wxString& value )
 672 {
 673     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 674
 675     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 676     wxString tmp;
 677     if (!value.IsNull()) tmp = value;
 678     gtk_entry_set_text( GTK_ENTRY(entry), wxGTK_CONV( tmp ) );
 679
 680     InvalidateBestSize();
 681 }
 682
 683 void wxComboBox::Copy()
 684 {
 685     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 686
 687     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 688     gtk_editable_copy_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 689 }
 690
 691 void wxComboBox::Cut()
 692 {
 693     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 694
 695     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 696     gtk_editable_cut_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 697 }
 698
 699 void wxComboBox::Paste()
 700 {
 701     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 702
 703     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 704     gtk_editable_paste_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG);
 705 }
 706
 707 void wxComboBox::Undo()
 708 {
 709     // TODO
 710 }
 711
 712 void wxComboBox::Redo()
 713 {
 714     // TODO
 715 }
 716
 717 void wxComboBox::SelectAll()
 718 {
 719     SetSelection(0, GetLastPosition());
 720 }
 721
 722 bool wxComboBox::CanUndo() const
 723 {
 724     // TODO
 725     return false;
 726 }
 727
 728 bool wxComboBox::CanRedo() const
 729 {
 730     // TODO
 731     return false;
 732 }
 733
 734 bool wxComboBox::HasSelection() const
 735 {
 736     long from, to;
 737     GetSelection(&from, &to);
 738     return from != to;
 739 }
 740
 741 bool wxComboBox::CanCopy() const
 742 {
 743     // Can copy if there's a selection
 744     return HasSelection();
 745 }
 746
 747 bool wxComboBox::CanCut() const
 748 {
 749     return CanCopy() && IsEditable();
 750 }
 751
 752 bool wxComboBox::CanPaste() const
 753 {
 754     // TODO: check for text on the clipboard
 755     return IsEditable() ;
 756 }
 757
 758 bool wxComboBox::IsEditable() const
 759 {
 760     return !HasFlag(wxCB_READONLY);
 761 }
 762
 763
 764 void wxComboBox::SetInsertionPoint( long pos )
 765 {
 766     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 767
 768     if ( pos == GetLastPosition() )
 769         pos = -1;
 770
 771     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 772     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
 773 }
 774
 775 long wxComboBox::GetInsertionPoint() const
 776 {
 777     return (long) GET_EDITABLE_POS( GTK_COMBO(m_widget)->entry );
 778 }
 779
 780 wxTextPos wxComboBox::GetLastPosition() const
 781 {
 782     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 783     int pos = GTK_ENTRY(entry)->text_length;
 784     return (long) pos-1;
 785 }
 786
 787 void wxComboBox::Replace( long from, long to, const wxString& value )
 788 {
 789     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 790
 791     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 792     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 793     if (value.IsNull()) return;
 794     gint pos = (gint)to;
 795
 796 #if wxUSE_UNICODE
 797     wxCharBuffer buffer = wxConvUTF8.cWX2MB( value );
 798     gtk_editable_insert_text( GTK_EDITABLE(entry), (const char*) buffer, strlen( (const char*) buffer ), &pos );
 799 #else
 800     gtk_editable_insert_text( GTK_EDITABLE(entry), value.c_str(), value.length(), &pos );
 801 #endif
 802 }
 803
 804 void wxComboBox::SetSelection( long from, long to )
 805 {
 806     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 807     gtk_editable_select_region( GTK_EDITABLE(entry), (gint)from, (gint)to );
 808 }
 809
 810 void wxComboBox::GetSelection( long* from, long* to ) const
 811 {
 812     if (IsEditable())
 813     {
 814         GtkEditable *editable = GTK_EDITABLE(GTK_COMBO(m_widget)->entry);
 815         *from = (long) editable->selection_start_pos;
 816         *to = (long) editable->selection_end_pos;
 817     }
 818 }
 819
 820 void wxComboBox::SetEditable( bool editable )
 821 {
 822     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 823     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 824 }
 825
 826 void wxComboBox::OnChar( wxKeyEvent &event )
 827 {
 828     if ( event.GetKeyCode() == WXK_RETURN )
 829     {
 830         // GTK automatically selects an item if its in the list
 831         wxCommandEvent eventEnter(wxEVT_COMMAND_TEXT_ENTER, GetId());
 832         eventEnter.SetString( GetValue() );
 833         eventEnter.SetInt( GetSelection() );
 834         eventEnter.SetEventObject( this );
 835
 836         if (!GetEventHandler()->ProcessEvent( eventEnter ))
 837         {
 838             // This will invoke the dialog default action, such
 839             // as the clicking the default button.
 840
 841             wxWindow *top_frame = m_parent;
 842             while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 843                 top_frame = top_frame->GetParent();
 844
 845             if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 846             {
 847                 GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 848
 849                 if (window->default_widget)
 850                         gtk_widget_activate (window->default_widget);
 851             }
 852         }
 853
 854         // Catch GTK event so that GTK doesn't open the drop
 855         // down list upon RETURN.
 856         return;
 857     }
 858
 859     event.Skip();
 860 }
 861
 862 void wxComboBox::DisableEvents()
 863 {
 864     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->list),
 865       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 866     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->entry),
 867       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 868 }
 869
 870 void wxComboBox::EnableEvents()
 871 {
 872     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(m_widget)->list), "select-child",
 873       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 874     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
 875       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 876 }
 877
 878 void wxComboBox::OnSize( wxSizeEvent &event )
 879 {
 880     // NB: In some situations (e.g. on non-first page of a wizard, if the
 881     //     size used is default size), GtkCombo widget is resized correctly,
 882     //     but it's look is not updated, it's rendered as if it was much wider.
 883     //     No other widgets are affected, so it looks like a bug in GTK+.
 884     //     Manually requesting resize calculation (as gtk_pizza_set_size does)
 885     //     fixes it.
 886     if (GTK_WIDGET_VISIBLE(m_widget))
 887         gtk_widget_queue_resize(m_widget);
 888
 889     event.Skip();
 890 }
 891
 892 void wxComboBox::DoApplyWidgetStyle(GtkRcStyle *style)
 893 {
 894 //    gtk_widget_modify_style( GTK_COMBO(m_widget)->button, syle );
 895
 896     gtk_widget_modify_style( GTK_COMBO(m_widget)->entry, style );
 897     gtk_widget_modify_style( GTK_COMBO(m_widget)->list, style );
 898
 899     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 900     GList *child = list->children;
 901     while (child)
 902     {
 903         gtk_widget_modify_style( GTK_WIDGET(child->data), style );
 904
 905         GtkBin *bin = GTK_BIN(child->data);
 906         gtk_widget_modify_style( bin->child, style );
 907
 908         child = child->next;
 909     }
 910 }
 911
 912 GtkWidget* wxComboBox::GetConnectWidget()
 913 {
 914     return GTK_COMBO(m_widget)->entry;
 915 }
 916
 917 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 918 {
 919     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 920              (window == GTK_COMBO(m_widget)->button->window ) );
 921 }
 922
 923 wxSize wxComboBox::DoGetBestSize() const
 924 {
 925     wxSize ret( wxControl::DoGetBestSize() );
 926
 927     // we know better our horizontal extent: it depends on the longest string
 928     // in the combobox
 929     if ( m_widget )
 930     {
 931         int width;
 932         unsigned int count = GetCount();
 933         for ( unsigned int n = 0; n < count; n++ )
 934         {
 935             GetTextExtent(GetString(n), &width, NULL, NULL, NULL );
 936             if ( width > ret.x )
 937                 ret.x = width;
 938         }
 939     }
 940
 941     // empty combobox should have some reasonable default size too
 942     if ( ret.x < 100 )
 943         ret.x = 100;
 944
 945     CacheBestSize(ret);
 946     return ret;
 947 }
 948
 949 // static
 950 wxVisualAttributes
 951 wxComboBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 952 {
 953     return GetDefaultAttributesFromGTKWidget(gtk_combo_new, true);
 954 }
 955
 956 // ----------------------------------------------------------------------------
 957 // standard event handling
 958 // ----------------------------------------------------------------------------
 959
 960 void wxComboBox::OnCut(wxCommandEvent& WXUNUSED(event))
 961 {
 962     Cut();
 963 }
 964
 965 void wxComboBox::OnCopy(wxCommandEvent& WXUNUSED(event))
 966 {
 967     Copy();
 968 }
 969
 970 void wxComboBox::OnPaste(wxCommandEvent& WXUNUSED(event))
 971 {
 972     Paste();
 973 }
 974
 975 void wxComboBox::OnUndo(wxCommandEvent& WXUNUSED(event))
 976 {
 977     Undo();
 978 }
 979
 980 void wxComboBox::OnRedo(wxCommandEvent& WXUNUSED(event))
 981 {
 982     Redo();
 983 }
 984
 985 void wxComboBox::OnDelete(wxCommandEvent& WXUNUSED(event))
 986 {
 987     long from, to;
 988     GetSelection(& from, & to);
 989     if (from != -1 && to != -1)
 990         Remove(from, to);
 991 }
 992
 993 void wxComboBox::OnSelectAll(wxCommandEvent& WXUNUSED(event))
 994 {
 995     SetSelection(-1, -1);
 996 }
 997
 998 void wxComboBox::OnUpdateCut(wxUpdateUIEvent& event)
 999 {
1000     event.Enable( CanCut() );
1001 }
1002
1003 void wxComboBox::OnUpdateCopy(wxUpdateUIEvent& event)
1004 {
1005     event.Enable( CanCopy() );
1006 }
1007
1008 void wxComboBox::OnUpdatePaste(wxUpdateUIEvent& event)
1009 {
1010     event.Enable( CanPaste() );
1011 }
1012
1013 void wxComboBox::OnUpdateUndo(wxUpdateUIEvent& event)
1014 {
1015     event.Enable( CanUndo() );
1016 }
1017
1018 void wxComboBox::OnUpdateRedo(wxUpdateUIEvent& event)
1019 {
1020     event.Enable( CanRedo() );
1021 }
1022
1023 void wxComboBox::OnUpdateDelete(wxUpdateUIEvent& event)
1024 {
1025     event.Enable(HasSelection() && IsEditable()) ;
1026 }
1027
1028 void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event)
1029 {
1030     event.Enable(GetLastPosition() > 0);
1031 }
1032
1033 #endif