src/gtk/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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  11 #pragma implementation "combobox.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #include "wx/combobox.h"
  18
  19 #if wxUSE_COMBOBOX
  20
  21 #include "wx/settings.h"
  22 #include "wx/arrstr.h"
  23 #include "wx/intl.h"
  24
  25 #include "wx/textctrl.h"    // for wxEVT_COMMAND_TEXT_UPDATED
  26
  27 #include "wx/gtk/private.h"
  28
  29 //-----------------------------------------------------------------------------
  30 // idle system
  31 //-----------------------------------------------------------------------------
  32
  33 extern void wxapp_install_idle_handler();
  34 extern bool g_isIdle;
  35
  36 //-----------------------------------------------------------------------------
  37 // data
  38 //-----------------------------------------------------------------------------
  39
  40 extern bool   g_blockEventsOnDrag;
  41 static int    g_SelectionBeforePopup = -1;
  42 //-----------------------------------------------------------------------------
  43 //  "changed" - typing and list item matches get changed, select-child
  44 //              if it doesn't match an item then just get a single changed
  45 //-----------------------------------------------------------------------------
  46
  47 static void
  48 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  49 {
  50     if (g_isIdle) wxapp_install_idle_handler();
  51
  52     if (combo->m_ignoreNextUpdate)
  53     {
  54         combo->m_ignoreNextUpdate = FALSE;
  55         return;
  56     }
  57
  58     if (!combo->m_hasVMT) return;
  59
  60     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  61     event.SetString( combo->GetValue() );
  62     event.SetEventObject( combo );
  63     combo->GetEventHandler()->ProcessEvent( event );
  64 }
  65
  66 static void
  67 gtk_dummy_callback(GtkEntry *WXUNUSED(entry), GtkCombo *WXUNUSED(combo))
  68 {
  69 }
  70
  71 static void
  72 gtk_popup_hide_callback(GtkCombo *WXUNUSED(gtk_combo), wxComboBox *combo)
  73 {
  74     // when the popup is hidden, throw a SELECTED event only if the combobox
  75     // selection changed.
  76     int curSelection = combo->GetSelection();
  77     if (g_SelectionBeforePopup != curSelection)
  78     {
  79         wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
  80         event.SetInt( curSelection );
  81         event.SetString( combo->GetStringSelection() );
  82         event.SetEventObject( combo );
  83         combo->GetEventHandler()->ProcessEvent( event );
  84     }
  85
  86     // reset the selection flag to an identifiable value
  87     g_SelectionBeforePopup = -1;
  88 }
  89
  90 static void
  91 gtk_popup_show_callback(GtkCombo *WXUNUSED(gtk_combo), wxComboBox *combo)
  92 {
  93     // store the combobox selection value before the popup is shown
  94     g_SelectionBeforePopup = combo->GetSelection();
  95 }
  96
  97 //-----------------------------------------------------------------------------
  98 // "select-child" - click/cursor get select-child, changed, select-child
  99 //-----------------------------------------------------------------------------
 100
 101 static void
 102 gtk_combo_select_child_callback( GtkList *WXUNUSED(list), GtkWidget *WXUNUSED(widget), wxComboBox *combo )
 103 {
 104     if (g_isIdle) wxapp_install_idle_handler();
 105
 106     if (!combo->m_hasVMT) return;
 107
 108     if (g_blockEventsOnDrag) return;
 109
 110     int curSelection = combo->GetSelection();
 111
 112     if (combo->m_prevSelection == curSelection) return;
 113
 114     GtkWidget *list = GTK_COMBO(combo->m_widget)->list;
 115     gtk_list_unselect_item( GTK_LIST(list), combo->m_prevSelection );
 116
 117     combo->m_prevSelection = curSelection;
 118
 119     // Quickly set the value of the combo box
 120     // as GTK+ does that only AFTER the event
 121     // is sent.
 122     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(combo->GetHandle())->entry),
 123       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)combo );
 124     combo->SetValue( combo->GetStringSelection() );
 125     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo->GetHandle())->entry), "changed",
 126       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)combo );
 127
 128     // throw a SELECTED event only if the combobox popup is hidden
 129     // because when combobox popup is shown, gtk_combo_select_child_callback is
 130     // called each times the mouse is over an item with a pressed button so a lot
 131     // of SELECTED event could be generated if the user keep the mouse button down
 132     // and select other items ...
 133     if (g_SelectionBeforePopup == -1)
 134     {
 135         wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
 136         event.SetInt( curSelection );
 137         event.SetString( combo->GetStringSelection() );
 138         event.SetEventObject( combo );
 139         combo->GetEventHandler()->ProcessEvent( event );
 140       }
 141
 142     // Now send the event ourselves
 143     wxCommandEvent event2( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
 144     event2.SetString( combo->GetValue() );
 145     event2.SetEventObject( combo );
 146     combo->GetEventHandler()->ProcessEvent( event2 );
 147 }
 148
 149 //-----------------------------------------------------------------------------
 150 // wxComboBox
 151 //-----------------------------------------------------------------------------
 152
 153 IMPLEMENT_DYNAMIC_CLASS(wxComboBox,wxControl)
 154
 155 BEGIN_EVENT_TABLE(wxComboBox, wxControl)
 156     EVT_SIZE(wxComboBox::OnSize)
 157     EVT_CHAR(wxComboBox::OnChar)
 158
 159     EVT_MENU(wxID_CUT, wxComboBox::OnCut)
 160     EVT_MENU(wxID_COPY, wxComboBox::OnCopy)
 161     EVT_MENU(wxID_PASTE, wxComboBox::OnPaste)
 162     EVT_MENU(wxID_UNDO, wxComboBox::OnUndo)
 163     EVT_MENU(wxID_REDO, wxComboBox::OnRedo)
 164     EVT_MENU(wxID_CLEAR, wxComboBox::OnDelete)
 165     EVT_MENU(wxID_SELECTALL, wxComboBox::OnSelectAll)
 166
 167     EVT_UPDATE_UI(wxID_CUT, wxComboBox::OnUpdateCut)
 168     EVT_UPDATE_UI(wxID_COPY, wxComboBox::OnUpdateCopy)
 169     EVT_UPDATE_UI(wxID_PASTE, wxComboBox::OnUpdatePaste)
 170     EVT_UPDATE_UI(wxID_UNDO, wxComboBox::OnUpdateUndo)
 171     EVT_UPDATE_UI(wxID_REDO, wxComboBox::OnUpdateRedo)
 172     EVT_UPDATE_UI(wxID_CLEAR, wxComboBox::OnUpdateDelete)
 173     EVT_UPDATE_UI(wxID_SELECTALL, wxComboBox::OnUpdateSelectAll)
 174 END_EVENT_TABLE()
 175
 176 bool wxComboBox::Create( wxWindow *parent, wxWindowID id,
 177                          const wxString& value,
 178                          const wxPoint& pos, const wxSize& size,
 179                          const wxArrayString& choices,
 180                          long style, const wxValidator& validator,
 181                          const wxString& name )
 182 {
 183     wxCArrayString chs(choices);
 184
 185     return Create( parent, id, value, pos, size, chs.GetCount(),
 186                    chs.GetStrings(), style, validator, name );
 187 }
 188
 189 bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
 190                          const wxPoint& pos, const wxSize& size,
 191                          int n, const wxString choices[],
 192                          long style, const wxValidator& validator,
 193                          const wxString& name )
 194 {
 195     m_ignoreNextUpdate = FALSE;
 196     m_needParent = TRUE;
 197     m_acceptsFocus = TRUE;
 198     m_prevSelection = 0;
 199
 200     if (!PreCreation( parent, pos, size ) ||
 201         !CreateBase( parent, id, pos, size, style, validator, name ))
 202     {
 203         wxFAIL_MSG( wxT("wxComboBox creation failed") );
 204         return FALSE;
 205     }
 206
 207     m_widget = gtk_combo_new();
 208     GtkCombo *combo = GTK_COMBO(m_widget);
 209
 210     // Disable GTK's broken events ...
 211     gtk_signal_disconnect( GTK_OBJECT(combo->entry), combo->entry_change_id );
 212     // ... and add surogate handler.
 213     combo->entry_change_id = gtk_signal_connect (GTK_OBJECT (combo->entry), "changed",
 214                               (GtkSignalFunc) gtk_dummy_callback, combo);
 215
 216     // make it more useable
 217     gtk_combo_set_use_arrows_always( GTK_COMBO(m_widget), TRUE );
 218
 219     // and case-sensitive
 220     gtk_combo_set_case_sensitive( GTK_COMBO(m_widget), TRUE );
 221
 222     if (style & wxNO_BORDER)
 223         g_object_set( GTK_ENTRY( combo->entry ), "has-frame", FALSE, NULL );
 224
 225     GtkWidget *list = GTK_COMBO(m_widget)->list;
 226
 227 #ifndef __WXGTK20__
 228     // gtk_list_set_selection_mode( GTK_LIST(list), GTK_SELECTION_MULTIPLE );
 229 #endif
 230
 231     for (int i = 0; i < n; i++)
 232     {
 233         GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( choices[i] ) );
 234
 235         m_clientDataList.Append( (wxObject*)NULL );
 236         m_clientObjectList.Append( (wxObject*)NULL );
 237
 238         gtk_container_add( GTK_CONTAINER(list), list_item );
 239
 240         gtk_widget_show( list_item );
 241     }
 242
 243     m_parent->DoAddChild( this );
 244
 245     m_focusWidget = combo->entry;
 246
 247     PostCreation(size);
 248
 249     ConnectWidget( combo->button );
 250
 251     // MSW's combo box shows the value and the selection is -1
 252     gtk_entry_set_text( GTK_ENTRY(combo->entry), wxGTK_CONV(value) );
 253     gtk_list_unselect_all( GTK_LIST(combo->list) );
 254
 255     if (style & wxCB_READONLY)
 256         gtk_entry_set_editable( GTK_ENTRY( combo->entry ), FALSE );
 257
 258     // "show" and "hide" events are generated when user click on the combobox button which popups a list
 259     // this list is the "popwin" gtk widget
 260     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "hide",
 261                         GTK_SIGNAL_FUNC(gtk_popup_hide_callback), (gpointer)this );
 262     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "show",
 263                         GTK_SIGNAL_FUNC(gtk_popup_show_callback), (gpointer)this );
 264
 265     gtk_signal_connect( GTK_OBJECT(combo->entry), "changed",
 266       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 267
 268     gtk_signal_connect( GTK_OBJECT(combo->list), "select-child",
 269       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 270
 271     SetBestSize(size); // need this too because this is a wxControlWithItems
 272
 273     // This is required for tool bar support
 274     wxSize setsize = GetSize();
 275     gtk_widget_set_usize( m_widget, setsize.x, setsize.y );
 276
 277     return TRUE;
 278 }
 279
 280 wxComboBox::~wxComboBox()
 281 {
 282     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 283     while (node)
 284     {
 285         wxClientData *cd = (wxClientData*)node->GetData();
 286         if (cd) delete cd;
 287         node = node->GetNext();
 288     }
 289     m_clientObjectList.Clear();
 290
 291     m_clientDataList.Clear();
 292 }
 293
 294 void wxComboBox::SetFocus()
 295 {
 296     if ( m_hasFocus )
 297     {
 298         // don't do anything if we already have focus
 299         return;
 300     }
 301
 302     gtk_widget_grab_focus( m_focusWidget );
 303 }
 304
 305 int wxComboBox::DoAppend( const wxString &item )
 306 {
 307     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 308
 309     DisableEvents();
 310
 311     GtkWidget *list = GTK_COMBO(m_widget)->list;
 312
 313     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 314
 315     gtk_container_add( GTK_CONTAINER(list), list_item );
 316
 317     if (GTK_WIDGET_REALIZED(m_widget))
 318     {
 319         gtk_widget_realize( list_item );
 320         gtk_widget_realize( GTK_BIN(list_item)->child );
 321     }
 322
 323     // Apply current widget style to the new list_item
 324     GtkRcStyle *style = CreateWidgetStyle();
 325     if (style)
 326     {
 327         gtk_widget_modify_style( GTK_WIDGET( list_item ), style );
 328         GtkBin *bin = GTK_BIN( list_item );
 329         GtkWidget *label = GTK_WIDGET( bin->child );
 330         gtk_widget_modify_style( label, style );
 331         gtk_rc_style_unref( style );
 332     }
 333
 334     gtk_widget_show( list_item );
 335
 336     const int count = GetCount();
 337
 338     if ( (int)m_clientDataList.GetCount() < count )
 339     m_clientDataList.Append( (wxObject*) NULL );
 340     if ( (int)m_clientObjectList.GetCount() < count )
 341     m_clientObjectList.Append( (wxObject*) NULL );
 342
 343     EnableEvents();
 344
 345     InvalidateBestSize();
 346
 347     return count - 1;
 348 }
 349
 350 int wxComboBox::DoInsert( const wxString &item, int pos )
 351 {
 352     wxCHECK_MSG( !(GetWindowStyle() & wxCB_SORT), -1,
 353                     wxT("can't insert into sorted list"));
 354
 355     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 356
 357     int count = GetCount();
 358     wxCHECK_MSG( (pos >= 0) && (pos <= count), -1, wxT("invalid index") );
 359
 360     if (pos == count)
 361         return Append(item);
 362
 363     DisableEvents();
 364
 365     GtkWidget *list = GTK_COMBO(m_widget)->list;
 366
 367     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 368
 369     GList *gitem_list = g_list_alloc ();
 370     gitem_list->data = list_item;
 371     gtk_list_insert_items( GTK_LIST (list), gitem_list, pos );
 372
 373     if (GTK_WIDGET_REALIZED(m_widget))
 374     {
 375         gtk_widget_realize( list_item );
 376         gtk_widget_realize( GTK_BIN(list_item)->child );
 377
 378         ApplyWidgetStyle();
 379     }
 380
 381     gtk_widget_show( list_item );
 382
 383     count = GetCount();
 384
 385     if ( (int)m_clientDataList.GetCount() < count )
 386     m_clientDataList.Insert( pos, (wxObject*) NULL );
 387     if ( (int)m_clientObjectList.GetCount() < count )
 388     m_clientObjectList.Insert( pos, (wxObject*) NULL );
 389
 390     EnableEvents();
 391
 392     InvalidateBestSize();
 393
 394     return pos;
 395 }
 396
 397 void wxComboBox::DoSetItemClientData( int n, void* clientData )
 398 {
 399     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 400
 401     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 402     if (!node) return;
 403
 404     node->SetData( (wxObject*) clientData );
 405 }
 406
 407 void* wxComboBox::DoGetItemClientData( int n ) const
 408 {
 409     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 410
 411     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 412
 413     return node ? node->GetData() : NULL;
 414 }
 415
 416 void wxComboBox::DoSetItemClientObject( int n, wxClientData* clientData )
 417 {
 418     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 419
 420     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 421     if (!node) return;
 422
 423     // wxItemContainer already deletes data for us
 424
 425     node->SetData( (wxObject*) clientData );
 426 }
 427
 428 wxClientData* wxComboBox::DoGetItemClientObject( int n ) const
 429 {
 430     wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, wxT("invalid combobox") );
 431
 432     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 433
 434     return node ? (wxClientData*) node->GetData() : NULL;
 435 }
 436
 437 void wxComboBox::Clear()
 438 {
 439     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 440
 441     DisableEvents();
 442
 443     GtkWidget *list = GTK_COMBO(m_widget)->list;
 444     gtk_list_clear_items( GTK_LIST(list), 0, GetCount() );
 445
 446     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 447     while (node)
 448     {
 449         wxClientData *cd = (wxClientData*)node->GetData();
 450         if (cd) delete cd;
 451         node = node->GetNext();
 452     }
 453     m_clientObjectList.Clear();
 454
 455     m_clientDataList.Clear();
 456
 457     EnableEvents();
 458
 459     InvalidateBestSize();
 460 }
 461
 462 void wxComboBox::Delete( int n )
 463 {
 464     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 465
 466     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 467
 468     GList *child = g_list_nth( listbox->children, n );
 469
 470     if (!child)
 471     {
 472         wxFAIL_MSG(wxT("wrong index"));
 473         return;
 474     }
 475
 476     DisableEvents();
 477
 478     GList *list = g_list_append( (GList*) NULL, child->data );
 479     gtk_list_remove_items( listbox, list );
 480     g_list_free( list );
 481
 482     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 483     if (node)
 484     {
 485         wxClientData *cd = (wxClientData*)node->GetData();
 486         if (cd) delete cd;
 487         m_clientObjectList.Erase( node );
 488     }
 489
 490     node = m_clientDataList.Item( n );
 491     if (node)
 492         m_clientDataList.Erase( node );
 493
 494     EnableEvents();
 495
 496     InvalidateBestSize();
 497 }
 498
 499 void wxComboBox::SetString(int n, const wxString &text)
 500 {
 501     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 502
 503     GtkWidget *list = GTK_COMBO(m_widget)->list;
 504
 505     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 506     if (child)
 507     {
 508         GtkBin *bin = GTK_BIN( child->data );
 509         GtkLabel *label = GTK_LABEL( bin->child );
 510         gtk_label_set_text(label, wxGTK_CONV(text));
 511     }
 512     else
 513     {
 514         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 515     }
 516
 517     InvalidateBestSize();
 518 }
 519
 520 int wxComboBox::FindString( const wxString &item ) const
 521 {
 522     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 523
 524     GtkWidget *list = GTK_COMBO(m_widget)->list;
 525
 526     GList *child = GTK_LIST(list)->children;
 527     int count = 0;
 528     while (child)
 529     {
 530         GtkBin *bin = GTK_BIN( child->data );
 531         GtkLabel *label = GTK_LABEL( bin->child );
 532 #ifdef __WXGTK20__
 533         wxString str( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 534 #else
 535         wxString str( label->label );
 536 #endif
 537         if (item == str)
 538             return count;
 539
 540         count++;
 541         child = child->next;
 542     }
 543
 544     return wxNOT_FOUND;
 545 }
 546
 547 int wxComboBox::GetSelection() const
 548 {
 549     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 550
 551     GtkWidget *list = GTK_COMBO(m_widget)->list;
 552
 553     GList *selection = GTK_LIST(list)->selection;
 554     if (selection)
 555     {
 556         GList *child = GTK_LIST(list)->children;
 557         int count = 0;
 558         while (child)
 559         {
 560             if (child->data == selection->data) return count;
 561             count++;
 562             child = child->next;
 563         }
 564     }
 565
 566     return -1;
 567 }
 568
 569 wxString wxComboBox::GetString( int n ) const
 570 {
 571     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 572
 573     GtkWidget *list = GTK_COMBO(m_widget)->list;
 574
 575     wxString str;
 576     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 577     if (child)
 578     {
 579         GtkBin *bin = GTK_BIN( child->data );
 580         GtkLabel *label = GTK_LABEL( bin->child );
 581 #ifdef __WXGTK20__
 582         str = wxGTK_CONV_BACK( gtk_label_get_text(label) );
 583 #else
 584         str = wxString( label->label );
 585 #endif
 586     }
 587     else
 588     {
 589         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 590     }
 591
 592     return str;
 593 }
 594
 595 wxString wxComboBox::GetStringSelection() const
 596 {
 597     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 598
 599     GtkWidget *list = GTK_COMBO(m_widget)->list;
 600
 601     GList *selection = GTK_LIST(list)->selection;
 602     if (selection)
 603     {
 604         GtkBin *bin = GTK_BIN( selection->data );
 605         GtkLabel *label = GTK_LABEL( bin->child );
 606 #ifdef __WXGTK20__
 607         wxString tmp( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 608 #else
 609         wxString tmp( label->label );
 610 #endif
 611         return tmp;
 612     }
 613
 614     wxFAIL_MSG( wxT("wxComboBox: no selection") );
 615
 616     return wxT("");
 617 }
 618
 619 int wxComboBox::GetCount() const
 620 {
 621     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 622
 623     GtkWidget *list = GTK_COMBO(m_widget)->list;
 624
 625     GList *child = GTK_LIST(list)->children;
 626     int count = 0;
 627     while (child) { count++; child = child->next; }
 628     return count;
 629 }
 630
 631 void wxComboBox::SetSelection( int n )
 632 {
 633     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 634
 635     DisableEvents();
 636
 637     GtkWidget *list = GTK_COMBO(m_widget)->list;
 638     gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 639     gtk_list_select_item( GTK_LIST(list), n );
 640     m_prevSelection = n;
 641
 642     EnableEvents();
 643 }
 644
 645 bool wxComboBox::SetStringSelection( const wxString &string )
 646 {
 647     wxCHECK_MSG( m_widget != NULL, false, wxT("invalid combobox") );
 648
 649     int res = FindString( string );
 650     if (res == -1) return false;
 651     SetSelection( res );
 652     return true;
 653 }
 654
 655 wxString wxComboBox::GetValue() const
 656 {
 657     GtkEntry *entry = GTK_ENTRY( GTK_COMBO(m_widget)->entry );
 658     wxString tmp( wxGTK_CONV_BACK( gtk_entry_get_text( entry ) ) );
 659
 660 #if 0
 661     for (int i = 0; i < wxStrlen(tmp.c_str()) +1; i++)
 662     {
 663         wxChar c = tmp[i];
 664         printf( "%d ", (int) (c) );
 665     }
 666     printf( "\n" );
 667 #endif
 668
 669     return tmp;
 670 }
 671
 672 void wxComboBox::SetValue( const wxString& value )
 673 {
 674     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 675
 676     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 677     wxString tmp = wxT("");
 678     if (!value.IsNull()) tmp = value;
 679     gtk_entry_set_text( GTK_ENTRY(entry), wxGTK_CONV( tmp ) );
 680
 681     InvalidateBestSize();
 682 }
 683
 684 void wxComboBox::Copy()
 685 {
 686     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 687
 688     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 689     gtk_editable_copy_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 690 }
 691
 692 void wxComboBox::Cut()
 693 {
 694     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 695
 696     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 697     gtk_editable_cut_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 698 }
 699
 700 void wxComboBox::Paste()
 701 {
 702     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 703
 704     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 705     gtk_editable_paste_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG);
 706 }
 707
 708 void wxComboBox::Undo()
 709 {
 710     // TODO
 711 }
 712
 713 void wxComboBox::Redo()
 714 {
 715     // TODO
 716 }
 717
 718 void wxComboBox::SelectAll()
 719 {
 720     SetSelection(0, GetLastPosition());
 721 }
 722
 723 bool wxComboBox::CanUndo() const
 724 {
 725     // TODO
 726     return false;
 727 }
 728
 729 bool wxComboBox::CanRedo() const
 730 {
 731     // TODO
 732     return false;
 733 }
 734
 735 bool wxComboBox::HasSelection() const
 736 {
 737     long from, to;
 738     GetSelection(&from, &to);
 739     return from != to;
 740 }
 741
 742 bool wxComboBox::CanCopy() const
 743 {
 744     // Can copy if there's a selection
 745     return HasSelection();
 746 }
 747
 748 bool wxComboBox::CanCut() const
 749 {
 750     return CanCopy() && IsEditable();
 751 }
 752
 753 bool wxComboBox::CanPaste() const
 754 {
 755     // TODO: check for text on the clipboard
 756     return IsEditable() ;
 757 }
 758
 759 bool wxComboBox::IsEditable() const
 760 {
 761     return !HasFlag(wxCB_READONLY);
 762 }
 763
 764
 765 void wxComboBox::SetInsertionPoint( long pos )
 766 {
 767     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 768
 769     if ( pos == GetLastPosition() )
 770         pos = -1;
 771
 772     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 773     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
 774 }
 775
 776 long wxComboBox::GetInsertionPoint() const
 777 {
 778     return (long) GET_EDITABLE_POS( GTK_COMBO(m_widget)->entry );
 779 }
 780
 781 long wxComboBox::GetLastPosition() const
 782 {
 783     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 784     int pos = GTK_ENTRY(entry)->text_length;
 785     return (long) pos-1;
 786 }
 787
 788 void wxComboBox::Replace( long from, long to, const wxString& value )
 789 {
 790     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 791
 792     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 793     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 794     if (value.IsNull()) return;
 795     gint pos = (gint)to;
 796
 797 #if wxUSE_UNICODE
 798     wxCharBuffer buffer = wxConvUTF8.cWX2MB( value );
 799     gtk_editable_insert_text( GTK_EDITABLE(entry), (const char*) buffer, strlen( (const char*) buffer ), &pos );
 800 #else
 801     gtk_editable_insert_text( GTK_EDITABLE(entry), value.c_str(), value.Length(), &pos );
 802 #endif
 803 }
 804
 805 void wxComboBox::SetSelection( long from, long to )
 806 {
 807     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 808     gtk_editable_select_region( GTK_EDITABLE(entry), (gint)from, (gint)to );
 809 }
 810
 811 void wxComboBox::GetSelection( long* from, long* to ) const
 812 {
 813     if (IsEditable())
 814     {
 815         GtkEditable *editable = GTK_EDITABLE(GTK_COMBO(m_widget)->entry);
 816 #ifdef __WXGTK20__
 817         gint start, end;
 818         gtk_editable_get_selection_bounds(editable, & start, & end);
 819         *from = start;
 820         *to = end;
 821 #else
 822         *from = (long) editable->selection_start_pos;
 823         *to = (long) editable->selection_end_pos;
 824 #endif
 825     }
 826 }
 827
 828 void wxComboBox::SetEditable( bool editable )
 829 {
 830     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 831     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 832 }
 833
 834 void wxComboBox::OnChar( wxKeyEvent &event )
 835 {
 836     if ( event.GetKeyCode() == WXK_RETURN )
 837     {
 838         // GTK automatically selects an item if its in the list
 839         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, GetId());
 840         event.SetString( GetValue() );
 841         event.SetInt( GetSelection() );
 842         event.SetEventObject( this );
 843
 844         if (!GetEventHandler()->ProcessEvent( event ))
 845         {
 846             // This will invoke the dialog default action, such
 847             // as the clicking the default button.
 848
 849             wxWindow *top_frame = m_parent;
 850             while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 851                 top_frame = top_frame->GetParent();
 852
 853             if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 854             {
 855                 GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 856
 857                 if (window->default_widget)
 858                         gtk_widget_activate (window->default_widget);
 859             }
 860         }
 861
 862         // Catch GTK event so that GTK doesn't open the drop
 863         // down list upon RETURN.
 864         return;
 865     }
 866
 867     event.Skip();
 868 }
 869
 870 void wxComboBox::DisableEvents()
 871 {
 872     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->list),
 873       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 874     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->entry),
 875       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 876 }
 877
 878 void wxComboBox::EnableEvents()
 879 {
 880     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(m_widget)->list), "select-child",
 881       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 882     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
 883       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 884 }
 885
 886 void wxComboBox::OnSize( wxSizeEvent &event )
 887 {
 888     // NB: In some situations (e.g. on non-first page of a wizard, if the
 889     //     size used is default size), GtkCombo widget is resized correctly,
 890     //     but it's look is not updated, it's rendered as if it was much wider.
 891     //     No other widgets are affected, so it looks like a bug in GTK+.
 892     //     Manually requesting resize calculation (as gtk_pizza_set_size does)
 893     //     fixes it.
 894     if (GTK_WIDGET_VISIBLE(m_widget))
 895         gtk_widget_queue_resize(m_widget);
 896
 897     event.Skip();
 898 }
 899
 900 void wxComboBox::DoApplyWidgetStyle(GtkRcStyle *style)
 901 {
 902 //    gtk_widget_modify_style( GTK_COMBO(m_widget)->button, syle );
 903
 904     gtk_widget_modify_style( GTK_COMBO(m_widget)->entry, style );
 905     gtk_widget_modify_style( GTK_COMBO(m_widget)->list, style );
 906
 907     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 908     GList *child = list->children;
 909     while (child)
 910     {
 911         gtk_widget_modify_style( GTK_WIDGET(child->data), style );
 912
 913         GtkBin *bin = GTK_BIN(child->data);
 914         gtk_widget_modify_style( bin->child, style );
 915
 916         child = child->next;
 917     }
 918 }
 919
 920 GtkWidget* wxComboBox::GetConnectWidget()
 921 {
 922     return GTK_COMBO(m_widget)->entry;
 923 }
 924
 925 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 926 {
 927     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 928              (window == GTK_COMBO(m_widget)->button->window ) );
 929 }
 930
 931 wxSize wxComboBox::DoGetBestSize() const
 932 {
 933     wxSize ret( wxControl::DoGetBestSize() );
 934
 935     // we know better our horizontal extent: it depends on the longest string
 936     // in the combobox
 937     if ( m_widget )
 938     {
 939         int width;
 940         size_t count = GetCount();
 941         for ( size_t n = 0; n < count; n++ )
 942         {
 943             GetTextExtent( GetString(n), &width, NULL, NULL, NULL );
 944             if ( width > ret.x )
 945                 ret.x = width;
 946         }
 947     }
 948
 949     // empty combobox should have some reasonable default size too
 950     if ( ret.x < 100 )
 951         ret.x = 100;
 952
 953     CacheBestSize(ret);
 954     return ret;
 955 }
 956
 957 // static
 958 wxVisualAttributes
 959 wxComboBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 960 {
 961     return GetDefaultAttributesFromGTKWidget(gtk_combo_new, true);
 962 }
 963
 964 // ----------------------------------------------------------------------------
 965 // standard event handling
 966 // ----------------------------------------------------------------------------
 967
 968 void wxComboBox::OnCut(wxCommandEvent& WXUNUSED(event))
 969 {
 970     Cut();
 971 }
 972
 973 void wxComboBox::OnCopy(wxCommandEvent& WXUNUSED(event))
 974 {
 975     Copy();
 976 }
 977
 978 void wxComboBox::OnPaste(wxCommandEvent& WXUNUSED(event))
 979 {
 980     Paste();
 981 }
 982
 983 void wxComboBox::OnUndo(wxCommandEvent& WXUNUSED(event))
 984 {
 985     Undo();
 986 }
 987
 988 void wxComboBox::OnRedo(wxCommandEvent& WXUNUSED(event))
 989 {
 990     Redo();
 991 }
 992
 993 void wxComboBox::OnDelete(wxCommandEvent& WXUNUSED(event))
 994 {
 995     long from, to;
 996     GetSelection(& from, & to);
 997     if (from != -1 && to != -1)
 998         Remove(from, to);
 999 }
1000
1001 void wxComboBox::OnSelectAll(wxCommandEvent& WXUNUSED(event))
1002 {
1003     SetSelection(-1, -1);
1004 }
1005
1006 void wxComboBox::OnUpdateCut(wxUpdateUIEvent& event)
1007 {
1008     event.Enable( CanCut() );
1009 }
1010
1011 void wxComboBox::OnUpdateCopy(wxUpdateUIEvent& event)
1012 {
1013     event.Enable( CanCopy() );
1014 }
1015
1016 void wxComboBox::OnUpdatePaste(wxUpdateUIEvent& event)
1017 {
1018     event.Enable( CanPaste() );
1019 }
1020
1021 void wxComboBox::OnUpdateUndo(wxUpdateUIEvent& event)
1022 {
1023     event.Enable( CanUndo() );
1024 }
1025
1026 void wxComboBox::OnUpdateRedo(wxUpdateUIEvent& event)
1027 {
1028     event.Enable( CanRedo() );
1029 }
1030
1031 void wxComboBox::OnUpdateDelete(wxUpdateUIEvent& event)
1032 {
1033     event.Enable(HasSelection() && IsEditable()) ;
1034 }
1035
1036 void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event)
1037 {
1038     event.Enable(GetLastPosition() > 0);
1039 }
1040
1041 #endif
1042