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 #ifdef __WXGTK20__
 223     if (style & wxNO_BORDER)
 224         g_object_set( GTK_ENTRY( combo->entry ), "has-frame", FALSE, NULL );
 225 #endif
 226
 227     GtkWidget *list = GTK_COMBO(m_widget)->list;
 228
 229 #ifndef __WXGTK20__
 230     // gtk_list_set_selection_mode( GTK_LIST(list), GTK_SELECTION_MULTIPLE );
 231 #endif
 232
 233     for (int i = 0; i < n; i++)
 234     {
 235         GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( choices[i] ) );
 236
 237         m_clientDataList.Append( (wxObject*)NULL );
 238         m_clientObjectList.Append( (wxObject*)NULL );
 239
 240         gtk_container_add( GTK_CONTAINER(list), list_item );
 241
 242         gtk_widget_show( list_item );
 243     }
 244
 245     m_parent->DoAddChild( this );
 246
 247     m_focusWidget = combo->entry;
 248
 249     PostCreation(size);
 250
 251     ConnectWidget( combo->button );
 252
 253     // MSW's combo box shows the value and the selection is -1
 254     gtk_entry_set_text( GTK_ENTRY(combo->entry), wxGTK_CONV(value) );
 255     gtk_list_unselect_all( GTK_LIST(combo->list) );
 256
 257     if (style & wxCB_READONLY)
 258         gtk_entry_set_editable( GTK_ENTRY( combo->entry ), FALSE );
 259
 260     // "show" and "hide" events are generated when user click on the combobox button which popups a list
 261     // this list is the "popwin" gtk widget
 262     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "hide",
 263                         GTK_SIGNAL_FUNC(gtk_popup_hide_callback), (gpointer)this );
 264     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "show",
 265                         GTK_SIGNAL_FUNC(gtk_popup_show_callback), (gpointer)this );
 266
 267     gtk_signal_connect( GTK_OBJECT(combo->entry), "changed",
 268       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 269
 270     gtk_signal_connect( GTK_OBJECT(combo->list), "select-child",
 271       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 272
 273     SetBestSize(size); // need this too because this is a wxControlWithItems
 274
 275     // This is required for tool bar support
 276     wxSize setsize = GetSize();
 277     gtk_widget_set_usize( m_widget, setsize.x, setsize.y );
 278
 279     return TRUE;
 280 }
 281
 282 wxComboBox::~wxComboBox()
 283 {
 284     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 285     while (node)
 286     {
 287         wxClientData *cd = (wxClientData*)node->GetData();
 288         if (cd) delete cd;
 289         node = node->GetNext();
 290     }
 291     m_clientObjectList.Clear();
 292
 293     m_clientDataList.Clear();
 294 }
 295
 296 void wxComboBox::SetFocus()
 297 {
 298     if ( m_hasFocus )
 299     {
 300         // don't do anything if we already have focus
 301         return;
 302     }
 303
 304     gtk_widget_grab_focus( m_focusWidget );
 305 }
 306
 307 int wxComboBox::DoAppend( const wxString &item )
 308 {
 309     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 310
 311     DisableEvents();
 312
 313     GtkWidget *list = GTK_COMBO(m_widget)->list;
 314
 315     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 316
 317     gtk_container_add( GTK_CONTAINER(list), list_item );
 318
 319     if (GTK_WIDGET_REALIZED(m_widget))
 320     {
 321         gtk_widget_realize( list_item );
 322         gtk_widget_realize( GTK_BIN(list_item)->child );
 323     }
 324
 325     // Apply current widget style to the new list_item
 326     GtkRcStyle *style = CreateWidgetStyle();
 327     if (style)
 328     {
 329         gtk_widget_modify_style( GTK_WIDGET( list_item ), style );
 330         GtkBin *bin = GTK_BIN( list_item );
 331         GtkWidget *label = GTK_WIDGET( bin->child );
 332         gtk_widget_modify_style( label, style );
 333         gtk_rc_style_unref( style );
 334     }
 335
 336     gtk_widget_show( list_item );
 337
 338     const int count = GetCount();
 339
 340     if ( (int)m_clientDataList.GetCount() < count )
 341     m_clientDataList.Append( (wxObject*) NULL );
 342     if ( (int)m_clientObjectList.GetCount() < count )
 343     m_clientObjectList.Append( (wxObject*) NULL );
 344
 345     EnableEvents();
 346
 347     InvalidateBestSize();
 348
 349     return count - 1;
 350 }
 351
 352 int wxComboBox::DoInsert( const wxString &item, int pos )
 353 {
 354     wxCHECK_MSG( !(GetWindowStyle() & wxCB_SORT), -1,
 355                     wxT("can't insert into sorted list"));
 356
 357     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 358
 359     int count = GetCount();
 360     wxCHECK_MSG( (pos >= 0) && (pos <= count), -1, wxT("invalid index") );
 361
 362     if (pos == count)
 363         return Append(item);
 364
 365     DisableEvents();
 366
 367     GtkWidget *list = GTK_COMBO(m_widget)->list;
 368
 369     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 370
 371     GList *gitem_list = g_list_alloc ();
 372     gitem_list->data = list_item;
 373     gtk_list_insert_items( GTK_LIST (list), gitem_list, pos );
 374
 375     if (GTK_WIDGET_REALIZED(m_widget))
 376     {
 377         gtk_widget_realize( list_item );
 378         gtk_widget_realize( GTK_BIN(list_item)->child );
 379
 380         ApplyWidgetStyle();
 381     }
 382
 383     gtk_widget_show( list_item );
 384
 385     count = GetCount();
 386
 387     if ( (int)m_clientDataList.GetCount() < count )
 388     m_clientDataList.Insert( pos, (wxObject*) NULL );
 389     if ( (int)m_clientObjectList.GetCount() < count )
 390     m_clientObjectList.Insert( pos, (wxObject*) NULL );
 391
 392     EnableEvents();
 393
 394     InvalidateBestSize();
 395
 396     return pos;
 397 }
 398
 399 void wxComboBox::DoSetItemClientData( int n, void* clientData )
 400 {
 401     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 402
 403     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 404     if (!node) return;
 405
 406     node->SetData( (wxObject*) clientData );
 407 }
 408
 409 void* wxComboBox::DoGetItemClientData( int n ) const
 410 {
 411     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 412
 413     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 414
 415     return node ? node->GetData() : NULL;
 416 }
 417
 418 void wxComboBox::DoSetItemClientObject( int n, wxClientData* clientData )
 419 {
 420     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 421
 422     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 423     if (!node) return;
 424
 425     // wxItemContainer already deletes data for us
 426
 427     node->SetData( (wxObject*) clientData );
 428 }
 429
 430 wxClientData* wxComboBox::DoGetItemClientObject( int n ) const
 431 {
 432     wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, wxT("invalid combobox") );
 433
 434     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 435
 436     return node ? (wxClientData*) node->GetData() : NULL;
 437 }
 438
 439 void wxComboBox::Clear()
 440 {
 441     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 442
 443     DisableEvents();
 444
 445     GtkWidget *list = GTK_COMBO(m_widget)->list;
 446     gtk_list_clear_items( GTK_LIST(list), 0, GetCount() );
 447
 448     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 449     while (node)
 450     {
 451         wxClientData *cd = (wxClientData*)node->GetData();
 452         if (cd) delete cd;
 453         node = node->GetNext();
 454     }
 455     m_clientObjectList.Clear();
 456
 457     m_clientDataList.Clear();
 458
 459     EnableEvents();
 460
 461     InvalidateBestSize();
 462 }
 463
 464 void wxComboBox::Delete( int n )
 465 {
 466     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 467
 468     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 469
 470     GList *child = g_list_nth( listbox->children, n );
 471
 472     if (!child)
 473     {
 474         wxFAIL_MSG(wxT("wrong index"));
 475         return;
 476     }
 477
 478     DisableEvents();
 479
 480     GList *list = g_list_append( (GList*) NULL, child->data );
 481     gtk_list_remove_items( listbox, list );
 482     g_list_free( list );
 483
 484     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 485     if (node)
 486     {
 487         wxClientData *cd = (wxClientData*)node->GetData();
 488         if (cd) delete cd;
 489         m_clientObjectList.Erase( node );
 490     }
 491
 492     node = m_clientDataList.Item( n );
 493     if (node)
 494         m_clientDataList.Erase( node );
 495
 496     EnableEvents();
 497
 498     InvalidateBestSize();
 499 }
 500
 501 void wxComboBox::SetString(int n, const wxString &text)
 502 {
 503     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 504
 505     GtkWidget *list = GTK_COMBO(m_widget)->list;
 506
 507     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 508     if (child)
 509     {
 510         GtkBin *bin = GTK_BIN( child->data );
 511         GtkLabel *label = GTK_LABEL( bin->child );
 512         gtk_label_set_text(label, wxGTK_CONV(text));
 513     }
 514     else
 515     {
 516         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 517     }
 518
 519     InvalidateBestSize();
 520 }
 521
 522 int wxComboBox::FindString( const wxString &item ) const
 523 {
 524     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 525
 526     GtkWidget *list = GTK_COMBO(m_widget)->list;
 527
 528     GList *child = GTK_LIST(list)->children;
 529     int count = 0;
 530     while (child)
 531     {
 532         GtkBin *bin = GTK_BIN( child->data );
 533         GtkLabel *label = GTK_LABEL( bin->child );
 534 #ifdef __WXGTK20__
 535         wxString str( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 536 #else
 537         wxString str( label->label );
 538 #endif
 539         if (item == str)
 540             return count;
 541
 542         count++;
 543         child = child->next;
 544     }
 545
 546     return wxNOT_FOUND;
 547 }
 548
 549 int wxComboBox::GetSelection() const
 550 {
 551     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 552
 553     GtkWidget *list = GTK_COMBO(m_widget)->list;
 554
 555     GList *selection = GTK_LIST(list)->selection;
 556     if (selection)
 557     {
 558         GList *child = GTK_LIST(list)->children;
 559         int count = 0;
 560         while (child)
 561         {
 562             if (child->data == selection->data) return count;
 563             count++;
 564             child = child->next;
 565         }
 566     }
 567
 568     return -1;
 569 }
 570
 571 wxString wxComboBox::GetString( int n ) const
 572 {
 573     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 574
 575     GtkWidget *list = GTK_COMBO(m_widget)->list;
 576
 577     wxString str;
 578     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 579     if (child)
 580     {
 581         GtkBin *bin = GTK_BIN( child->data );
 582         GtkLabel *label = GTK_LABEL( bin->child );
 583 #ifdef __WXGTK20__
 584         str = wxGTK_CONV_BACK( gtk_label_get_text(label) );
 585 #else
 586         str = wxString( label->label );
 587 #endif
 588     }
 589     else
 590     {
 591         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 592     }
 593
 594     return str;
 595 }
 596
 597 wxString wxComboBox::GetStringSelection() const
 598 {
 599     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 600
 601     GtkWidget *list = GTK_COMBO(m_widget)->list;
 602
 603     GList *selection = GTK_LIST(list)->selection;
 604     if (selection)
 605     {
 606         GtkBin *bin = GTK_BIN( selection->data );
 607         GtkLabel *label = GTK_LABEL( bin->child );
 608 #ifdef __WXGTK20__
 609         wxString tmp( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 610 #else
 611         wxString tmp( label->label );
 612 #endif
 613         return tmp;
 614     }
 615
 616     wxFAIL_MSG( wxT("wxComboBox: no selection") );
 617
 618     return wxT("");
 619 }
 620
 621 int wxComboBox::GetCount() const
 622 {
 623     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 624
 625     GtkWidget *list = GTK_COMBO(m_widget)->list;
 626
 627     GList *child = GTK_LIST(list)->children;
 628     int count = 0;
 629     while (child) { count++; child = child->next; }
 630     return count;
 631 }
 632
 633 void wxComboBox::SetSelection( int n )
 634 {
 635     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 636
 637     DisableEvents();
 638
 639     GtkWidget *list = GTK_COMBO(m_widget)->list;
 640     gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 641     gtk_list_select_item( GTK_LIST(list), n );
 642     m_prevSelection = n;
 643
 644     EnableEvents();
 645 }
 646
 647 bool wxComboBox::SetStringSelection( const wxString &string )
 648 {
 649     wxCHECK_MSG( m_widget != NULL, false, wxT("invalid combobox") );
 650
 651     int res = FindString( string );
 652     if (res == -1) return false;
 653     SetSelection( res );
 654     return true;
 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 = wxT("");
 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 long 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 #ifdef __WXGTK20__
 819         gint start, end;
 820         gtk_editable_get_selection_bounds(editable, & start, & end);
 821         *from = start;
 822         *to = end;
 823 #else
 824         *from = (long) editable->selection_start_pos;
 825         *to = (long) editable->selection_end_pos;
 826 #endif
 827     }
 828 }
 829
 830 void wxComboBox::SetEditable( bool editable )
 831 {
 832     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 833     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 834 }
 835
 836 void wxComboBox::OnChar( wxKeyEvent &event )
 837 {
 838     if ( event.GetKeyCode() == WXK_RETURN )
 839     {
 840         // GTK automatically selects an item if its in the list
 841         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, GetId());
 842         event.SetString( GetValue() );
 843         event.SetInt( GetSelection() );
 844         event.SetEventObject( this );
 845
 846         if (!GetEventHandler()->ProcessEvent( event ))
 847         {
 848             // This will invoke the dialog default action, such
 849             // as the clicking the default button.
 850
 851             wxWindow *top_frame = m_parent;
 852             while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 853                 top_frame = top_frame->GetParent();
 854
 855             if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 856             {
 857                 GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 858
 859                 if (window->default_widget)
 860                         gtk_widget_activate (window->default_widget);
 861             }
 862         }
 863
 864         // Catch GTK event so that GTK doesn't open the drop
 865         // down list upon RETURN.
 866         return;
 867     }
 868
 869     event.Skip();
 870 }
 871
 872 void wxComboBox::DisableEvents()
 873 {
 874     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->list),
 875       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 876     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->entry),
 877       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 878 }
 879
 880 void wxComboBox::EnableEvents()
 881 {
 882     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(m_widget)->list), "select-child",
 883       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 884     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
 885       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 886 }
 887
 888 void wxComboBox::OnSize( wxSizeEvent &event )
 889 {
 890     // NB: In some situations (e.g. on non-first page of a wizard, if the
 891     //     size used is default size), GtkCombo widget is resized correctly,
 892     //     but it's look is not updated, it's rendered as if it was much wider.
 893     //     No other widgets are affected, so it looks like a bug in GTK+.
 894     //     Manually requesting resize calculation (as gtk_pizza_set_size does)
 895     //     fixes it.
 896     if (GTK_WIDGET_VISIBLE(m_widget))
 897         gtk_widget_queue_resize(m_widget);
 898
 899     event.Skip();
 900 }
 901
 902 void wxComboBox::DoApplyWidgetStyle(GtkRcStyle *style)
 903 {
 904 //    gtk_widget_modify_style( GTK_COMBO(m_widget)->button, syle );
 905
 906     gtk_widget_modify_style( GTK_COMBO(m_widget)->entry, style );
 907     gtk_widget_modify_style( GTK_COMBO(m_widget)->list, style );
 908
 909     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 910     GList *child = list->children;
 911     while (child)
 912     {
 913         gtk_widget_modify_style( GTK_WIDGET(child->data), style );
 914
 915         GtkBin *bin = GTK_BIN(child->data);
 916         gtk_widget_modify_style( bin->child, style );
 917
 918         child = child->next;
 919     }
 920 }
 921
 922 GtkWidget* wxComboBox::GetConnectWidget()
 923 {
 924     return GTK_COMBO(m_widget)->entry;
 925 }
 926
 927 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 928 {
 929     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 930              (window == GTK_COMBO(m_widget)->button->window ) );
 931 }
 932
 933 wxSize wxComboBox::DoGetBestSize() const
 934 {
 935     wxSize ret( wxControl::DoGetBestSize() );
 936
 937     // we know better our horizontal extent: it depends on the longest string
 938     // in the combobox
 939     if ( m_widget )
 940     {
 941         int width;
 942         size_t count = GetCount();
 943         for ( size_t n = 0; n < count; n++ )
 944         {
 945             GetTextExtent( GetString(n), &width, NULL, NULL, NULL );
 946             if ( width > ret.x )
 947                 ret.x = width;
 948         }
 949     }
 950
 951     // empty combobox should have some reasonable default size too
 952     if ( ret.x < 100 )
 953         ret.x = 100;
 954
 955     CacheBestSize(ret);
 956     return ret;
 957 }
 958
 959 // static
 960 wxVisualAttributes
 961 wxComboBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 962 {
 963     return GetDefaultAttributesFromGTKWidget(gtk_combo_new, true);
 964 }
 965
 966 // ----------------------------------------------------------------------------
 967 // standard event handling
 968 // ----------------------------------------------------------------------------
 969
 970 void wxComboBox::OnCut(wxCommandEvent& WXUNUSED(event))
 971 {
 972     Cut();
 973 }
 974
 975 void wxComboBox::OnCopy(wxCommandEvent& WXUNUSED(event))
 976 {
 977     Copy();
 978 }
 979
 980 void wxComboBox::OnPaste(wxCommandEvent& WXUNUSED(event))
 981 {
 982     Paste();
 983 }
 984
 985 void wxComboBox::OnUndo(wxCommandEvent& WXUNUSED(event))
 986 {
 987     Undo();
 988 }
 989
 990 void wxComboBox::OnRedo(wxCommandEvent& WXUNUSED(event))
 991 {
 992     Redo();
 993 }
 994
 995 void wxComboBox::OnDelete(wxCommandEvent& WXUNUSED(event))
 996 {
 997     long from, to;
 998     GetSelection(& from, & to);
 999     if (from != -1 && to != -1)
1000         Remove(from, to);
1001 }
1002
1003 void wxComboBox::OnSelectAll(wxCommandEvent& WXUNUSED(event))
1004 {
1005     SetSelection(-1, -1);
1006 }
1007
1008 void wxComboBox::OnUpdateCut(wxUpdateUIEvent& event)
1009 {
1010     event.Enable( CanCut() );
1011 }
1012
1013 void wxComboBox::OnUpdateCopy(wxUpdateUIEvent& event)
1014 {
1015     event.Enable( CanCopy() );
1016 }
1017
1018 void wxComboBox::OnUpdatePaste(wxUpdateUIEvent& event)
1019 {
1020     event.Enable( CanPaste() );
1021 }
1022
1023 void wxComboBox::OnUpdateUndo(wxUpdateUIEvent& event)
1024 {
1025     event.Enable( CanUndo() );
1026 }
1027
1028 void wxComboBox::OnUpdateRedo(wxUpdateUIEvent& event)
1029 {
1030     event.Enable( CanRedo() );
1031 }
1032
1033 void wxComboBox::OnUpdateDelete(wxUpdateUIEvent& event)
1034 {
1035     event.Enable(HasSelection() && IsEditable()) ;
1036 }
1037
1038 void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event)
1039 {
1040     event.Enable(GetLastPosition() > 0);
1041 }
1042
1043 #endif
1044