src/gtk1/combobox.cpp

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