src/gtk/combobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/combobox.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/combobox.h"
  14
  15 #if wxUSE_COMBOBOX
  16
  17 #include "wx/settings.h"
  18 #include "wx/arrstr.h"
  19 #include "wx/intl.h"
  20
  21 #include "wx/textctrl.h"    // for wxEVT_COMMAND_TEXT_UPDATED
  22
  23 #include "wx/gtk/private.h"
  24
  25 //-----------------------------------------------------------------------------
  26 // idle system
  27 //-----------------------------------------------------------------------------
  28
  29 extern void wxapp_install_idle_handler();
  30 extern bool g_isIdle;
  31
  32 //-----------------------------------------------------------------------------
  33 // data
  34 //-----------------------------------------------------------------------------
  35
  36 extern bool   g_blockEventsOnDrag;
  37 static int    g_SelectionBeforePopup = wxID_NONE; // this means the popup is hidden
  38
  39 //-----------------------------------------------------------------------------
  40 //  "changed" - typing and list item matches get changed, select-child
  41 //              if it doesn't match an item then just get a single changed
  42 //-----------------------------------------------------------------------------
  43
  44 extern "C" {
  45 static void
  46 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  47 {
  48     if (g_isIdle) wxapp_install_idle_handler();
  49
  50     if (combo->m_ignoreNextUpdate)
  51     {
  52         combo->m_ignoreNextUpdate = false;
  53         return;
  54     }
  55
  56     if (!combo->m_hasVMT) return;
  57
  58     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  59     event.SetString( combo->GetValue() );
  60     event.SetEventObject( combo );
  61     combo->GetEventHandler()->ProcessEvent( event );
  62 }
  63 }
  64
  65 extern "C" {
  66 static void
  67 gtk_dummy_callback(GtkEntry *WXUNUSED(entry), GtkCombo *WXUNUSED(combo))
  68 {
  69 }
  70 }
  71
  72 extern "C" {
  73 static void
  74 gtk_popup_hide_callback(GtkCombo *WXUNUSED(gtk_combo), wxComboBox *combo)
  75 {
  76     // when the popup is hidden, throw a SELECTED event only if the combobox
  77     // selection changed.
  78     const int curSelection = combo->GetCurrentSelection();
  79
  80     const bool hasChanged = curSelection != g_SelectionBeforePopup;
  81
  82     // reset the selection flag to value meaning that it is hidden and do it
  83     // now, before generating the events, so that GetSelection() returns the
  84     // new value from the event handler
  85     g_SelectionBeforePopup = wxID_NONE;
  86
  87     if ( hasChanged )
  88     {
  89         wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
  90         event.SetInt( curSelection );
  91         event.SetString( combo->GetStringSelection() );
  92         event.SetEventObject( combo );
  93         combo->GetEventHandler()->ProcessEvent( event );
  94
  95         // for consistency with the other ports, send TEXT event
  96         wxCommandEvent event2( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  97         event2.SetString( combo->GetStringSelection() );
  98         event2.SetEventObject( combo );
  99         combo->GetEventHandler()->ProcessEvent( event2 );
 100     }
 101 }
 102 }
 103
 104 extern "C" {
 105 static void
 106 gtk_popup_show_callback(GtkCombo *WXUNUSED(gtk_combo), wxComboBox *combo)
 107 {
 108     // store the combobox selection value before the popup is shown
 109     g_SelectionBeforePopup = combo->GetCurrentSelection();
 110 }
 111 }
 112
 113 //-----------------------------------------------------------------------------
 114 // "select-child" - click/cursor get select-child, changed, select-child
 115 //-----------------------------------------------------------------------------
 116
 117 extern "C" {
 118 static void
 119 gtk_combo_select_child_callback( GtkList *WXUNUSED(list), GtkWidget *WXUNUSED(widget), wxComboBox *combo )
 120 {
 121     if (g_isIdle) wxapp_install_idle_handler();
 122
 123     if (!combo->m_hasVMT) return;
 124
 125     if (g_blockEventsOnDrag) return;
 126
 127     int curSelection = combo->GetCurrentSelection();
 128
 129     if (combo->m_prevSelection == curSelection) return;
 130
 131     GtkWidget *list = GTK_COMBO(combo->m_widget)->list;
 132     gtk_list_unselect_item( GTK_LIST(list), combo->m_prevSelection );
 133
 134     combo->m_prevSelection = curSelection;
 135
 136     // Quickly set the value of the combo box
 137     // as GTK+ does that only AFTER the event
 138     // is sent.
 139     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     if (style & wxNO_BORDER)
 242         g_object_set( GTK_ENTRY( combo->entry ), "has-frame", FALSE, NULL );
 243
 244     GtkWidget *list = GTK_COMBO(m_widget)->list;
 245
 246     for (int i = 0; i < n; i++)
 247     {
 248         GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( choices[i] ) );
 249
 250         m_clientDataList.Append( (wxObject*)NULL );
 251         m_clientObjectList.Append( (wxObject*)NULL );
 252
 253         gtk_container_add( GTK_CONTAINER(list), list_item );
 254
 255         gtk_widget_show( list_item );
 256     }
 257
 258     m_parent->DoAddChild( this );
 259
 260     m_focusWidget = combo->entry;
 261
 262     PostCreation(size);
 263
 264     ConnectWidget( combo->button );
 265
 266     // MSW's combo box shows the value and the selection is -1
 267     gtk_entry_set_text( GTK_ENTRY(combo->entry), wxGTK_CONV(value) );
 268     gtk_list_unselect_all( GTK_LIST(combo->list) );
 269
 270     if (style & wxCB_READONLY)
 271         gtk_entry_set_editable( GTK_ENTRY( combo->entry ), FALSE );
 272
 273     // "show" and "hide" events are generated when user click on the combobox button which popups a list
 274     // this list is the "popwin" gtk widget
 275     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "hide",
 276                         GTK_SIGNAL_FUNC(gtk_popup_hide_callback), (gpointer)this );
 277     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "show",
 278                         GTK_SIGNAL_FUNC(gtk_popup_show_callback), (gpointer)this );
 279
 280     gtk_signal_connect_after( GTK_OBJECT(combo->entry), "changed",
 281       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 282
 283     gtk_signal_connect_after( GTK_OBJECT(combo->list), "select-child",
 284       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 285
 286     SetBestSize(size); // need this too because this is a wxControlWithItems
 287
 288     // This is required for tool bar support
 289 //    wxSize setsize = GetSize();
 290 //    gtk_widget_set_usize( m_widget, setsize.x, setsize.y );
 291
 292     return true;
 293 }
 294
 295 wxComboBox::~wxComboBox()
 296 {
 297     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 298     while (node)
 299     {
 300         wxClientData *cd = (wxClientData*)node->GetData();
 301         if (cd) delete cd;
 302         node = node->GetNext();
 303     }
 304     m_clientObjectList.Clear();
 305
 306     m_clientDataList.Clear();
 307 }
 308
 309 void wxComboBox::SetFocus()
 310 {
 311     if ( m_hasFocus )
 312     {
 313         // don't do anything if we already have focus
 314         return;
 315     }
 316
 317     gtk_widget_grab_focus( m_focusWidget );
 318 }
 319
 320 int wxComboBox::DoAppend( const wxString &item )
 321 {
 322     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 323
 324     DisableEvents();
 325
 326     GtkWidget *list = GTK_COMBO(m_widget)->list;
 327
 328     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 329
 330     gtk_container_add( GTK_CONTAINER(list), list_item );
 331
 332     if (GTK_WIDGET_REALIZED(m_widget))
 333     {
 334         gtk_widget_realize( list_item );
 335         gtk_widget_realize( GTK_BIN(list_item)->child );
 336     }
 337
 338     // Apply current widget style to the new list_item
 339     GtkRcStyle *style = CreateWidgetStyle();
 340     if (style)
 341     {
 342         gtk_widget_modify_style( GTK_WIDGET( list_item ), style );
 343         GtkBin *bin = GTK_BIN( list_item );
 344         GtkWidget *label = GTK_WIDGET( bin->child );
 345         gtk_widget_modify_style( label, style );
 346         gtk_rc_style_unref( style );
 347     }
 348
 349     gtk_widget_show( list_item );
 350
 351     const int count = GetCount();
 352
 353     if ( (int)m_clientDataList.GetCount() < count )
 354         m_clientDataList.Append( (wxObject*) NULL );
 355     if ( (int)m_clientObjectList.GetCount() < count )
 356         m_clientObjectList.Append( (wxObject*) NULL );
 357
 358     EnableEvents();
 359
 360     InvalidateBestSize();
 361
 362     return count - 1;
 363 }
 364
 365 int wxComboBox::DoInsert( const wxString &item, int pos )
 366 {
 367     wxCHECK_MSG( !(GetWindowStyle() & wxCB_SORT), -1,
 368                     wxT("can't insert into sorted list"));
 369
 370     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 371
 372     int count = GetCount();
 373     wxCHECK_MSG( (pos >= 0) && (pos <= count), -1, wxT("invalid index") );
 374
 375     if (pos == count)
 376         return Append(item);
 377
 378     DisableEvents();
 379
 380     GtkWidget *list = GTK_COMBO(m_widget)->list;
 381
 382     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 383
 384     GList *gitem_list = g_list_alloc ();
 385     gitem_list->data = list_item;
 386     gtk_list_insert_items( GTK_LIST (list), gitem_list, pos );
 387
 388     if (GTK_WIDGET_REALIZED(m_widget))
 389     {
 390         gtk_widget_realize( list_item );
 391         gtk_widget_realize( GTK_BIN(list_item)->child );
 392
 393         ApplyWidgetStyle();
 394     }
 395
 396     gtk_widget_show( list_item );
 397
 398     count = GetCount();
 399
 400     if ( (int)m_clientDataList.GetCount() < count )
 401         m_clientDataList.Insert( pos, (wxObject*) NULL );
 402     if ( (int)m_clientObjectList.GetCount() < count )
 403         m_clientObjectList.Insert( pos, (wxObject*) NULL );
 404
 405     EnableEvents();
 406
 407     InvalidateBestSize();
 408
 409     return pos;
 410 }
 411
 412 void wxComboBox::DoSetItemClientData( int n, void* clientData )
 413 {
 414     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 415
 416     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 417     if (!node) return;
 418
 419     node->SetData( (wxObject*) clientData );
 420 }
 421
 422 void* wxComboBox::DoGetItemClientData( int n ) const
 423 {
 424     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 425
 426     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 427
 428     return node ? node->GetData() : NULL;
 429 }
 430
 431 void wxComboBox::DoSetItemClientObject( int n, wxClientData* clientData )
 432 {
 433     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 434
 435     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 436     if (!node) return;
 437
 438     // wxItemContainer already deletes data for us
 439
 440     node->SetData( (wxObject*) clientData );
 441 }
 442
 443 wxClientData* wxComboBox::DoGetItemClientObject( int n ) const
 444 {
 445     wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, wxT("invalid combobox") );
 446
 447     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 448
 449     return node ? (wxClientData*) node->GetData() : NULL;
 450 }
 451
 452 void wxComboBox::Clear()
 453 {
 454     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 455
 456     DisableEvents();
 457
 458     GtkWidget *list = GTK_COMBO(m_widget)->list;
 459     gtk_list_clear_items( GTK_LIST(list), 0, GetCount() );
 460
 461     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 462     while (node)
 463     {
 464         wxClientData *cd = (wxClientData*)node->GetData();
 465         if (cd) delete cd;
 466         node = node->GetNext();
 467     }
 468     m_clientObjectList.Clear();
 469
 470     m_clientDataList.Clear();
 471
 472     EnableEvents();
 473
 474     InvalidateBestSize();
 475 }
 476
 477 void wxComboBox::Delete( int n )
 478 {
 479     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 480
 481     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 482
 483     GList *child = g_list_nth( listbox->children, n );
 484
 485     if (!child)
 486     {
 487         wxFAIL_MSG(wxT("wrong index"));
 488         return;
 489     }
 490
 491     DisableEvents();
 492
 493     GList *list = g_list_append( (GList*) NULL, child->data );
 494     gtk_list_remove_items( listbox, list );
 495     g_list_free( list );
 496
 497     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 498     if (node)
 499     {
 500         wxClientData *cd = (wxClientData*)node->GetData();
 501         if (cd) delete cd;
 502         m_clientObjectList.Erase( node );
 503     }
 504
 505     node = m_clientDataList.Item( n );
 506     if (node)
 507         m_clientDataList.Erase( node );
 508
 509     EnableEvents();
 510
 511     InvalidateBestSize();
 512 }
 513
 514 void wxComboBox::SetString(int n, const wxString &text)
 515 {
 516     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 517
 518     GtkWidget *list = GTK_COMBO(m_widget)->list;
 519
 520     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 521     if (child)
 522     {
 523         GtkBin *bin = GTK_BIN( child->data );
 524         GtkLabel *label = GTK_LABEL( bin->child );
 525         gtk_label_set_text(label, wxGTK_CONV(text));
 526     }
 527     else
 528     {
 529         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 530     }
 531
 532     InvalidateBestSize();
 533 }
 534
 535 int wxComboBox::FindString( const wxString &item, bool bCase ) const
 536 {
 537     wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid combobox") );
 538
 539     GtkWidget *list = GTK_COMBO(m_widget)->list;
 540
 541     GList *child = GTK_LIST(list)->children;
 542     int count = 0;
 543     while (child)
 544     {
 545         GtkBin *bin = GTK_BIN( child->data );
 546         GtkLabel *label = GTK_LABEL( bin->child );
 547         wxString str( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 548
 549         if (item.IsSameAs( str , bCase ) )
 550             return count;
 551
 552         count++;
 553         child = child->next;
 554     }
 555
 556     return wxNOT_FOUND;
 557 }
 558
 559 int wxComboBox::GetSelection() const
 560 {
 561     // if the popup is currently opened, use the selection as it had been
 562     // before it dropped down
 563     return g_SelectionBeforePopup == wxID_NONE ? GetCurrentSelection()
 564                                                : g_SelectionBeforePopup;
 565 }
 566
 567 int wxComboBox::GetCurrentSelection() const
 568 {
 569     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 570
 571     GtkWidget *list = GTK_COMBO(m_widget)->list;
 572
 573     GList *selection = GTK_LIST(list)->selection;
 574     if (selection)
 575     {
 576         GList *child = GTK_LIST(list)->children;
 577         int count = 0;
 578         while (child)
 579         {
 580             if (child->data == selection->data) return count;
 581             count++;
 582             child = child->next;
 583         }
 584     }
 585
 586     return -1;
 587 }
 588
 589 wxString wxComboBox::GetString( int n ) const
 590 {
 591     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 592
 593     GtkWidget *list = GTK_COMBO(m_widget)->list;
 594
 595     wxString str;
 596     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 597     if (child)
 598     {
 599         GtkBin *bin = GTK_BIN( child->data );
 600         GtkLabel *label = GTK_LABEL( bin->child );
 601         str = wxGTK_CONV_BACK( gtk_label_get_text(label) );
 602     }
 603     else
 604     {
 605         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 606     }
 607
 608     return str;
 609 }
 610
 611 wxString wxComboBox::GetStringSelection() const
 612 {
 613     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 614
 615     GtkWidget *list = GTK_COMBO(m_widget)->list;
 616
 617     GList *selection = GTK_LIST(list)->selection;
 618     if (selection)
 619     {
 620         GtkBin *bin = GTK_BIN( selection->data );
 621         GtkLabel *label = GTK_LABEL( bin->child );
 622         wxString tmp( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 623         return tmp;
 624     }
 625
 626     wxFAIL_MSG( wxT("wxComboBox: no selection") );
 627
 628     return wxEmptyString;
 629 }
 630
 631 int wxComboBox::GetCount() const
 632 {
 633     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 634
 635     GtkWidget *list = GTK_COMBO(m_widget)->list;
 636
 637     GList *child = GTK_LIST(list)->children;
 638     int count = 0;
 639     while (child) { count++; child = child->next; }
 640     return count;
 641 }
 642
 643 void wxComboBox::SetSelection( int n )
 644 {
 645     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 646
 647     DisableEvents();
 648
 649     GtkWidget *list = GTK_COMBO(m_widget)->list;
 650     gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 651     gtk_list_select_item( GTK_LIST(list), n );
 652     m_prevSelection = n;
 653
 654     EnableEvents();
 655 }
 656
 657 wxString wxComboBox::GetValue() const
 658 {
 659     GtkEntry *entry = GTK_ENTRY( GTK_COMBO(m_widget)->entry );
 660     wxString tmp( wxGTK_CONV_BACK( gtk_entry_get_text( entry ) ) );
 661
 662 #if 0
 663     for (int i = 0; i < wxStrlen(tmp.c_str()) +1; i++)
 664     {
 665         wxChar c = tmp[i];
 666         printf( "%d ", (int) (c) );
 667     }
 668     printf( "\n" );
 669 #endif
 670
 671     return tmp;
 672 }
 673
 674 void wxComboBox::SetValue( const wxString& value )
 675 {
 676     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 677
 678     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 679     wxString tmp;
 680     if (!value.IsNull()) tmp = value;
 681     gtk_entry_set_text( GTK_ENTRY(entry), wxGTK_CONV( tmp ) );
 682
 683     InvalidateBestSize();
 684 }
 685
 686 void wxComboBox::Copy()
 687 {
 688     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 689
 690     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 691     gtk_editable_copy_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 692 }
 693
 694 void wxComboBox::Cut()
 695 {
 696     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 697
 698     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 699     gtk_editable_cut_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 700 }
 701
 702 void wxComboBox::Paste()
 703 {
 704     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 705
 706     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 707     gtk_editable_paste_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG);
 708 }
 709
 710 void wxComboBox::Undo()
 711 {
 712     // TODO
 713 }
 714
 715 void wxComboBox::Redo()
 716 {
 717     // TODO
 718 }
 719
 720 void wxComboBox::SelectAll()
 721 {
 722     SetSelection(0, GetLastPosition());
 723 }
 724
 725 bool wxComboBox::CanUndo() const
 726 {
 727     // TODO
 728     return false;
 729 }
 730
 731 bool wxComboBox::CanRedo() const
 732 {
 733     // TODO
 734     return false;
 735 }
 736
 737 bool wxComboBox::HasSelection() const
 738 {
 739     long from, to;
 740     GetSelection(&from, &to);
 741     return from != to;
 742 }
 743
 744 bool wxComboBox::CanCopy() const
 745 {
 746     // Can copy if there's a selection
 747     return HasSelection();
 748 }
 749
 750 bool wxComboBox::CanCut() const
 751 {
 752     return CanCopy() && IsEditable();
 753 }
 754
 755 bool wxComboBox::CanPaste() const
 756 {
 757     // TODO: check for text on the clipboard
 758     return IsEditable() ;
 759 }
 760
 761 bool wxComboBox::IsEditable() const
 762 {
 763     return !HasFlag(wxCB_READONLY);
 764 }
 765
 766
 767 void wxComboBox::SetInsertionPoint( long pos )
 768 {
 769     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 770
 771     if ( pos == GetLastPosition() )
 772         pos = -1;
 773
 774     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 775     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
 776 }
 777
 778 long wxComboBox::GetInsertionPoint() const
 779 {
 780     return (long) GET_EDITABLE_POS( GTK_COMBO(m_widget)->entry );
 781 }
 782
 783 wxTextPos wxComboBox::GetLastPosition() const
 784 {
 785     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 786     int pos = GTK_ENTRY(entry)->text_length;
 787     return (long) pos-1;
 788 }
 789
 790 void wxComboBox::Replace( long from, long to, const wxString& value )
 791 {
 792     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 793
 794     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 795     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 796     if (value.IsNull()) return;
 797     gint pos = (gint)to;
 798
 799 #if wxUSE_UNICODE
 800     wxCharBuffer buffer = wxConvUTF8.cWX2MB( value );
 801     gtk_editable_insert_text( GTK_EDITABLE(entry), (const char*) buffer, strlen( (const char*) buffer ), &pos );
 802 #else
 803     gtk_editable_insert_text( GTK_EDITABLE(entry), value.c_str(), value.Length(), &pos );
 804 #endif
 805 }
 806
 807 void wxComboBox::SetSelection( long from, long to )
 808 {
 809     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 810     gtk_editable_select_region( GTK_EDITABLE(entry), (gint)from, (gint)to );
 811 }
 812
 813 void wxComboBox::GetSelection( long* from, long* to ) const
 814 {
 815     if (IsEditable())
 816     {
 817         GtkEditable *editable = GTK_EDITABLE(GTK_COMBO(m_widget)->entry);
 818         gint start, end;
 819         gtk_editable_get_selection_bounds(editable, & start, & end);
 820         *from = start;
 821         *to = end;
 822     }
 823 }
 824
 825 void wxComboBox::SetEditable( bool editable )
 826 {
 827     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 828     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 829 }
 830
 831 void wxComboBox::OnChar( wxKeyEvent &event )
 832 {
 833     if ( event.GetKeyCode() == WXK_RETURN )
 834     {
 835         // GTK automatically selects an item if its in the list
 836         wxCommandEvent eventEnter(wxEVT_COMMAND_TEXT_ENTER, GetId());
 837         eventEnter.SetString( GetValue() );
 838         eventEnter.SetInt( GetSelection() );
 839         eventEnter.SetEventObject( this );
 840
 841         if (!GetEventHandler()->ProcessEvent( eventEnter ))
 842         {
 843             // This will invoke the dialog default action, such
 844             // as the clicking the default button.
 845
 846             wxWindow *top_frame = m_parent;
 847             while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 848                 top_frame = top_frame->GetParent();
 849
 850             if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 851             {
 852                 GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 853
 854                 if (window->default_widget)
 855                         gtk_widget_activate (window->default_widget);
 856             }
 857         }
 858
 859         // Catch GTK event so that GTK doesn't open the drop
 860         // down list upon RETURN.
 861         return;
 862     }
 863
 864     event.Skip();
 865 }
 866
 867 void wxComboBox::DisableEvents()
 868 {
 869     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->list),
 870       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 871     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->entry),
 872       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 873 }
 874
 875 void wxComboBox::EnableEvents()
 876 {
 877     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(m_widget)->list), "select-child",
 878       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 879     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
 880       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 881 }
 882
 883 void wxComboBox::OnSize( wxSizeEvent &event )
 884 {
 885     // NB: In some situations (e.g. on non-first page of a wizard, if the
 886     //     size used is default size), GtkCombo widget is resized correctly,
 887     //     but it's look is not updated, it's rendered as if it was much wider.
 888     //     No other widgets are affected, so it looks like a bug in GTK+.
 889     //     Manually requesting resize calculation (as gtk_pizza_set_size does)
 890     //     fixes it.
 891     if (GTK_WIDGET_VISIBLE(m_widget))
 892         gtk_widget_queue_resize(m_widget);
 893
 894     event.Skip();
 895 }
 896
 897 void wxComboBox::DoApplyWidgetStyle(GtkRcStyle *style)
 898 {
 899 //    gtk_widget_modify_style( GTK_COMBO(m_widget)->button, syle );
 900
 901     gtk_widget_modify_style( GTK_COMBO(m_widget)->entry, style );
 902     gtk_widget_modify_style( GTK_COMBO(m_widget)->list, style );
 903
 904     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 905     GList *child = list->children;
 906     while (child)
 907     {
 908         gtk_widget_modify_style( GTK_WIDGET(child->data), style );
 909
 910         GtkBin *bin = GTK_BIN(child->data);
 911         gtk_widget_modify_style( bin->child, style );
 912
 913         child = child->next;
 914     }
 915 }
 916
 917 GtkWidget* wxComboBox::GetConnectWidget()
 918 {
 919     return GTK_COMBO(m_widget)->entry;
 920 }
 921
 922 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 923 {
 924     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 925              (window == GTK_COMBO(m_widget)->button->window ) );
 926 }
 927
 928 wxSize wxComboBox::DoGetBestSize() const
 929 {
 930     wxSize ret( wxControl::DoGetBestSize() );
 931
 932     // we know better our horizontal extent: it depends on the longest string
 933     // in the combobox
 934     if ( m_widget )
 935     {
 936         int width;
 937         size_t count = GetCount();
 938         for ( size_t n = 0; n < count; n++ )
 939         {
 940             GetTextExtent( GetString(n), &width, NULL, NULL, NULL );
 941             if ( width > ret.x )
 942                 ret.x = width;
 943         }
 944     }
 945
 946     // empty combobox should have some reasonable default size too
 947     if ( ret.x < 100 )
 948         ret.x = 100;
 949
 950     CacheBestSize(ret);
 951     return ret;
 952 }
 953
 954 // static
 955 wxVisualAttributes
 956 wxComboBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 957 {
 958     return GetDefaultAttributesFromGTKWidget(gtk_combo_new, true);
 959 }
 960
 961 // ----------------------------------------------------------------------------
 962 // standard event handling
 963 // ----------------------------------------------------------------------------
 964
 965 void wxComboBox::OnCut(wxCommandEvent& WXUNUSED(event))
 966 {
 967     Cut();
 968 }
 969
 970 void wxComboBox::OnCopy(wxCommandEvent& WXUNUSED(event))
 971 {
 972     Copy();
 973 }
 974
 975 void wxComboBox::OnPaste(wxCommandEvent& WXUNUSED(event))
 976 {
 977     Paste();
 978 }
 979
 980 void wxComboBox::OnUndo(wxCommandEvent& WXUNUSED(event))
 981 {
 982     Undo();
 983 }
 984
 985 void wxComboBox::OnRedo(wxCommandEvent& WXUNUSED(event))
 986 {
 987     Redo();
 988 }
 989
 990 void wxComboBox::OnDelete(wxCommandEvent& WXUNUSED(event))
 991 {
 992     long from, to;
 993     GetSelection(& from, & to);
 994     if (from != -1 && to != -1)
 995         Remove(from, to);
 996 }
 997
 998 void wxComboBox::OnSelectAll(wxCommandEvent& WXUNUSED(event))
 999 {
1000     SetSelection(-1, -1);
1001 }
1002
1003 void wxComboBox::OnUpdateCut(wxUpdateUIEvent& event)
1004 {
1005     event.Enable( CanCut() );
1006 }
1007
1008 void wxComboBox::OnUpdateCopy(wxUpdateUIEvent& event)
1009 {
1010     event.Enable( CanCopy() );
1011 }
1012
1013 void wxComboBox::OnUpdatePaste(wxUpdateUIEvent& event)
1014 {
1015     event.Enable( CanPaste() );
1016 }
1017
1018 void wxComboBox::OnUpdateUndo(wxUpdateUIEvent& event)
1019 {
1020     event.Enable( CanUndo() );
1021 }
1022
1023 void wxComboBox::OnUpdateRedo(wxUpdateUIEvent& event)
1024 {
1025     event.Enable( CanRedo() );
1026 }
1027
1028 void wxComboBox::OnUpdateDelete(wxUpdateUIEvent& event)
1029 {
1030     event.Enable(HasSelection() && IsEditable()) ;
1031 }
1032
1033 void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event)
1034 {
1035     event.Enable(GetLastPosition() > 0);
1036 }
1037
1038 #endif