src/gtk1/combobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        combobox.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "combobox.h"
  12 #endif
  13
  14 #include "wx/combobox.h"
  15
  16 #if wxUSE_COMBOBOX
  17
  18 #include "wx/settings.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
  38 //-----------------------------------------------------------------------------
  39 // "select-child" - click/cursor get select-child, changed, select-child
  40 //-----------------------------------------------------------------------------
  41
  42 static void
  43 gtk_combo_select_child_callback( GtkList *WXUNUSED(list), GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  44 {
  45     if (g_isIdle) wxapp_install_idle_handler();
  46
  47     if (!combo->m_hasVMT) return;
  48
  49     if (g_blockEventsOnDrag) return;
  50
  51     int curSelection = combo->GetSelection();
  52
  53     if (combo->m_prevSelection != curSelection)
  54     {
  55         GtkWidget *list = GTK_COMBO(combo->m_widget)->list;
  56         gtk_list_unselect_item( GTK_LIST(list), combo->m_prevSelection );
  57     }
  58     combo->m_prevSelection = curSelection;
  59
  60     wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
  61     event.SetInt( curSelection );
  62     event.SetString( combo->GetStringSelection() );
  63     event.SetEventObject( combo );
  64
  65     combo->GetEventHandler()->ProcessEvent( event );
  66 }
  67
  68 //-----------------------------------------------------------------------------
  69 //  "changed" - typing and list item matches get changed, select-child
  70 //              if it doesn't match an item then just get a single changed
  71 //-----------------------------------------------------------------------------
  72
  73 static void
  74 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  75 {
  76     if (g_isIdle) wxapp_install_idle_handler();
  77
  78     if (!combo->m_hasVMT) return;
  79
  80     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  81     event.SetString( combo->GetValue() );
  82     event.SetEventObject( combo );
  83     combo->GetEventHandler()->ProcessEvent( event );
  84 }
  85
  86 static void
  87 gtk_dummy_callback(GtkEntry *WXUNUSED(entry), GtkCombo *WXUNUSED(combo))
  88 {
  89 }
  90
  91 //-----------------------------------------------------------------------------
  92 // wxComboBox
  93 //-----------------------------------------------------------------------------
  94
  95 IMPLEMENT_DYNAMIC_CLASS(wxComboBox,wxControl)
  96
  97 BEGIN_EVENT_TABLE(wxComboBox, wxControl)
  98     EVT_SIZE(wxComboBox::OnSize)
  99     EVT_CHAR(wxComboBox::OnChar)
 100 END_EVENT_TABLE()
 101
 102 bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
 103                          const wxPoint& pos, const wxSize& size,
 104                          int n, const wxString choices[],
 105                          long style, const wxValidator& validator,
 106                          const wxString& name )
 107 {
 108     m_alreadySent = FALSE;
 109     m_needParent = TRUE;
 110     m_acceptsFocus = TRUE;
 111     m_prevSelection = 0;
 112
 113     if (!PreCreation( parent, pos, size ) ||
 114         !CreateBase( parent, id, pos, size, style, validator, name ))
 115     {
 116         wxFAIL_MSG( wxT("wxComboBox creation failed") );
 117         return FALSE;
 118     }
 119
 120     m_widget = gtk_combo_new();
 121     GtkCombo *combo = GTK_COMBO(m_widget);
 122
 123     // Disable GTK's broken events ...
 124     gtk_signal_disconnect( GTK_OBJECT(combo->entry), combo->entry_change_id );
 125     // ... and add surogate handler.
 126     combo->entry_change_id = gtk_signal_connect (GTK_OBJECT (combo->entry), "changed",
 127                               (GtkSignalFunc) gtk_dummy_callback, combo);
 128
 129     // make it more useable
 130     gtk_combo_set_use_arrows_always( GTK_COMBO(m_widget), TRUE );
 131
 132     // and case-sensitive
 133     gtk_combo_set_case_sensitive( GTK_COMBO(m_widget), TRUE );
 134
 135     GtkWidget *list = GTK_COMBO(m_widget)->list;
 136
 137 #ifndef __WXGTK20__
 138     // gtk_list_set_selection_mode( GTK_LIST(list), GTK_SELECTION_MULTIPLE );
 139 #endif
 140
 141     for (int i = 0; i < n; i++)
 142     {
 143         GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( choices[i] ) );
 144
 145         m_clientDataList.Append( (wxObject*)NULL );
 146         m_clientObjectList.Append( (wxObject*)NULL );
 147
 148         gtk_container_add( GTK_CONTAINER(list), list_item );
 149
 150         gtk_widget_show( list_item );
 151     }
 152
 153     m_parent->DoAddChild( this );
 154
 155     m_focusWidget = combo->entry;
 156
 157     PostCreation();
 158
 159     ConnectWidget( combo->button );
 160
 161     // MSW's combo box shows the value and the selection is -1
 162     gtk_entry_set_text( GTK_ENTRY(combo->entry), wxGTK_CONV(value) );
 163     gtk_list_unselect_all( GTK_LIST(combo->list) );
 164
 165     if (style & wxCB_READONLY)
 166         gtk_entry_set_editable( GTK_ENTRY( combo->entry ), FALSE );
 167
 168     gtk_signal_connect( GTK_OBJECT(combo->entry), "changed",
 169       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 170
 171     gtk_signal_connect( GTK_OBJECT(combo->list), "select-child",
 172       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 173
 174     wxSize size_best( DoGetBestSize() );
 175     wxSize new_size( size );
 176     if (new_size.x == -1)
 177         new_size.x = size_best.x;
 178     if (new_size.y == -1)
 179         new_size.y = size_best.y;
 180     if (new_size.y > size_best.y)
 181         new_size.y = size_best.y;
 182     if ((new_size.x != size.x) || (new_size.y != size.y))
 183     {
 184         SetSize( new_size.x, new_size.y );
 185
 186         // This is required for tool bar support
 187         gtk_widget_set_usize( m_widget, new_size.x, new_size.y );
 188     }
 189
 190     SetBackgroundColour( wxSystemSettings::GetColour( wxSYS_COLOUR_WINDOW ) );
 191     SetForegroundColour( parent->GetForegroundColour() );
 192
 193     Show( TRUE );
 194
 195     return TRUE;
 196 }
 197
 198 wxComboBox::~wxComboBox()
 199 {
 200     wxNode *node = m_clientObjectList.GetFirst();
 201     while (node)
 202     {
 203         wxClientData *cd = (wxClientData*)node->GetData();
 204         if (cd) delete cd;
 205         node = node->GetNext();
 206     }
 207     m_clientObjectList.Clear();
 208
 209     m_clientDataList.Clear();
 210 }
 211
 212 void wxComboBox::SetFocus()
 213 {
 214     if ( m_hasFocus )
 215     {
 216         // don't do anything if we already have focus
 217         return;
 218     }
 219
 220     gtk_widget_grab_focus( m_focusWidget );
 221 }
 222
 223 void wxComboBox::AppendCommon( const wxString &item )
 224 {
 225     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 226
 227     DisableEvents();
 228
 229     GtkWidget *list = GTK_COMBO(m_widget)->list;
 230
 231     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 232
 233     gtk_container_add( GTK_CONTAINER(list), list_item );
 234
 235     if (GTK_WIDGET_REALIZED(m_widget))
 236     {
 237         gtk_widget_realize( list_item );
 238         gtk_widget_realize( GTK_BIN(list_item)->child );
 239
 240         if (m_widgetStyle) ApplyWidgetStyle();
 241     }
 242
 243     gtk_widget_show( list_item );
 244
 245     EnableEvents();
 246 }
 247
 248 void wxComboBox::Append( const wxString &item )
 249 {
 250     m_clientDataList.Append( (wxObject*) NULL );
 251     m_clientObjectList.Append( (wxObject*) NULL );
 252
 253     AppendCommon( item );
 254 }
 255
 256 void wxComboBox::Append( const wxString &item, void *clientData )
 257 {
 258     m_clientDataList.Append( (wxObject*) clientData );
 259     m_clientObjectList.Append( (wxObject*)NULL );
 260
 261     AppendCommon( item );
 262 }
 263
 264 void wxComboBox::Append( const wxString &item, wxClientData *clientData )
 265 {
 266     m_clientDataList.Append( (wxObject*) NULL );
 267     m_clientObjectList.Append( (wxObject*) clientData );
 268
 269     AppendCommon( item );
 270 }
 271
 272 void wxComboBox::InsertCommon( const wxString &item, int pos )
 273 {
 274     wxCHECK_RET(!(GetWindowStyle() & wxCB_SORT), wxT("can't insert into sorted list"));
 275     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 276
 277     int count = GetCount();
 278     wxCHECK_RET((pos>=0) && (pos<=count), wxT("invalid index"));
 279     if (pos == count)
 280     {
 281         AppendCommon(item);
 282         return;
 283     }
 284
 285     DisableEvents();
 286
 287     GtkWidget *list = GTK_COMBO(m_widget)->list;
 288
 289     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 290
 291     GList *gitem_list = g_list_alloc ();
 292     gitem_list->data = list_item;
 293     gtk_list_insert_items( GTK_LIST (list), gitem_list, pos );
 294
 295     if (GTK_WIDGET_REALIZED(m_widget))
 296     {
 297         gtk_widget_realize( list_item );
 298         gtk_widget_realize( GTK_BIN(list_item)->child );
 299
 300         if (m_widgetStyle) ApplyWidgetStyle();
 301     }
 302
 303     gtk_widget_show( list_item );
 304
 305     EnableEvents();
 306 }
 307
 308 void wxComboBox::Insert( const wxString &item, int pos )
 309 {
 310     wxCHECK_RET(!(GetWindowStyle() & wxCB_SORT), wxT("can't insert into sorted list"));
 311     int count = GetCount();
 312     wxCHECK_RET((pos>=0) && (pos<=count), wxT("invalid index"));
 313     if (pos == count)
 314     {
 315         Append(item);
 316         return;
 317     }
 318
 319     m_clientDataList.Insert( pos, (wxObject*) NULL );
 320     m_clientObjectList.Insert( pos, (wxObject*) NULL );
 321
 322     InsertCommon( item, pos );
 323 }
 324
 325 void wxComboBox::Insert( const wxString &item, int pos, void *clientData )
 326 {
 327     wxCHECK_RET(!(GetWindowStyle() & wxCB_SORT), wxT("can't insert into sorted list"));
 328     int count = GetCount();
 329     wxCHECK_RET((pos>=0) && (pos<=count), wxT("invalid index"));
 330     if (pos == count)
 331     {
 332         Append(item, clientData);
 333         return;
 334     }
 335
 336     m_clientDataList.Insert( pos, (wxObject*) clientData );
 337     m_clientObjectList.Insert( pos, (wxObject*)NULL );
 338
 339     InsertCommon( item, pos );
 340 }
 341
 342 void wxComboBox::Insert( const wxString &item, int pos, wxClientData *clientData )
 343 {
 344     wxCHECK_RET(!(GetWindowStyle() & wxCB_SORT), wxT("can't insert into sorted list"));
 345     int count = GetCount();
 346     wxCHECK_RET((pos>=0) && (pos<=count), wxT("invalid index"));
 347     if (pos == count)
 348     {
 349         Append(item, clientData);
 350         return;
 351     }
 352
 353     m_clientDataList.Insert( pos, (wxObject*) NULL );
 354     m_clientObjectList.Insert( pos, (wxObject*) clientData );
 355
 356     InsertCommon( item, pos );
 357 }
 358
 359 void wxComboBox::SetClientData( int n, void* clientData )
 360 {
 361     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 362
 363     wxNode *node = m_clientDataList.Item( n );
 364     if (!node) return;
 365
 366     node->SetData( (wxObject*) clientData );
 367 }
 368
 369 void* wxComboBox::GetClientData( int n )
 370 {
 371     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 372
 373     wxNode *node = m_clientDataList.Item( n );
 374     if (!node) return NULL;
 375
 376     return node->GetData();
 377 }
 378
 379 void wxComboBox::SetClientObject( int n, wxClientData* clientData )
 380 {
 381     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 382
 383     wxNode *node = m_clientObjectList.Item( n );
 384     if (!node) return;
 385
 386     wxClientData *cd = (wxClientData*) node->GetData();
 387     if (cd) delete cd;
 388
 389     node->SetData( (wxObject*) clientData );
 390 }
 391
 392 wxClientData* wxComboBox::GetClientObject( int n )
 393 {
 394     wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, wxT("invalid combobox") );
 395
 396     wxNode *node = m_clientObjectList.Item( n );
 397     if (!node) return (wxClientData*) NULL;
 398
 399     return (wxClientData*) node->GetData();
 400 }
 401
 402 void wxComboBox::Clear()
 403 {
 404     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 405
 406     DisableEvents();
 407
 408     GtkWidget *list = GTK_COMBO(m_widget)->list;
 409     gtk_list_clear_items( GTK_LIST(list), 0, Number() );
 410
 411     wxNode *node = m_clientObjectList.GetFirst();
 412     while (node)
 413     {
 414         wxClientData *cd = (wxClientData*)node->GetData();
 415         if (cd) delete cd;
 416         node = node->GetNext();
 417     }
 418     m_clientObjectList.Clear();
 419
 420     m_clientDataList.Clear();
 421
 422     EnableEvents();
 423 }
 424
 425 void wxComboBox::Delete( int n )
 426 {
 427     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 428
 429     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 430
 431     GList *child = g_list_nth( listbox->children, n );
 432
 433     if (!child)
 434     {
 435         wxFAIL_MSG(wxT("wrong index"));
 436         return;
 437     }
 438
 439     DisableEvents();
 440
 441     GList *list = g_list_append( (GList*) NULL, child->data );
 442     gtk_list_remove_items( listbox, list );
 443     g_list_free( list );
 444
 445     wxNode *node = m_clientObjectList.Item( n );
 446     if (node)
 447     {
 448         wxClientData *cd = (wxClientData*)node->GetData();
 449         if (cd) delete cd;
 450         m_clientObjectList.DeleteNode( node );
 451     }
 452
 453     node = m_clientDataList.Item( n );
 454     if (node)
 455         m_clientDataList.DeleteNode( node );
 456
 457     EnableEvents();
 458 }
 459
 460 void wxComboBox::SetString(int n, const wxString &text)
 461 {
 462     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 463
 464     GtkWidget *list = GTK_COMBO(m_widget)->list;
 465
 466     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 467     if (child)
 468     {
 469         GtkBin *bin = GTK_BIN( child->data );
 470         GtkLabel *label = GTK_LABEL( bin->child );
 471         gtk_label_set_text(label, wxGTK_CONV(text));
 472     }
 473     else
 474     {
 475         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 476     }
 477 }
 478
 479 int wxComboBox::FindString( const wxString &item )
 480 {
 481     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 482
 483     GtkWidget *list = GTK_COMBO(m_widget)->list;
 484
 485     GList *child = GTK_LIST(list)->children;
 486     int count = 0;
 487     while (child)
 488     {
 489         GtkBin *bin = GTK_BIN( child->data );
 490         GtkLabel *label = GTK_LABEL( bin->child );
 491 #ifdef __WXGTK20__
 492         wxString str( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 493 #else
 494         wxString str( label->label );
 495 #endif
 496         if (item == str)
 497             return count;
 498
 499         count++;
 500         child = child->next;
 501     }
 502
 503     return wxNOT_FOUND;
 504 }
 505
 506 int wxComboBox::GetSelection() const
 507 {
 508     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 509
 510     GtkWidget *list = GTK_COMBO(m_widget)->list;
 511
 512     GList *selection = GTK_LIST(list)->selection;
 513     if (selection)
 514     {
 515         GList *child = GTK_LIST(list)->children;
 516         int count = 0;
 517         while (child)
 518         {
 519             if (child->data == selection->data) return count;
 520             count++;
 521             child = child->next;
 522         }
 523     }
 524
 525     return -1;
 526 }
 527
 528 wxString wxComboBox::GetString( int n ) const
 529 {
 530     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 531
 532     GtkWidget *list = GTK_COMBO(m_widget)->list;
 533
 534     wxString str;
 535     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 536     if (child)
 537     {
 538         GtkBin *bin = GTK_BIN( child->data );
 539         GtkLabel *label = GTK_LABEL( bin->child );
 540 #ifdef __WXGTK20__
 541         str = wxGTK_CONV_BACK( gtk_label_get_text(label) );
 542 #else
 543         str = wxString( label->label );
 544 #endif
 545     }
 546     else
 547     {
 548         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 549     }
 550
 551     return str;
 552 }
 553
 554 wxString wxComboBox::GetStringSelection() const
 555 {
 556     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 557
 558     GtkWidget *list = GTK_COMBO(m_widget)->list;
 559
 560     GList *selection = GTK_LIST(list)->selection;
 561     if (selection)
 562     {
 563         GtkBin *bin = GTK_BIN( selection->data );
 564         GtkLabel *label = GTK_LABEL( bin->child );
 565 #ifdef __WXGTK20__
 566         wxString tmp( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 567 #else
 568         wxString tmp( label->label );
 569 #endif
 570         return tmp;
 571     }
 572
 573     wxFAIL_MSG( wxT("wxComboBox: no selection") );
 574
 575     return wxT("");
 576 }
 577
 578 int wxComboBox::Number() const
 579 {
 580     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 581
 582     GtkWidget *list = GTK_COMBO(m_widget)->list;
 583
 584     GList *child = GTK_LIST(list)->children;
 585     int count = 0;
 586     while (child) { count++; child = child->next; }
 587     return count;
 588 }
 589
 590 void wxComboBox::SetSelection( int n )
 591 {
 592     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 593
 594     DisableEvents();
 595
 596     GtkWidget *list = GTK_COMBO(m_widget)->list;
 597     gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 598     gtk_list_select_item( GTK_LIST(list), n );
 599     m_prevSelection = n;
 600
 601     EnableEvents();
 602 }
 603
 604 void wxComboBox::SetStringSelection( const wxString &string )
 605 {
 606     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 607
 608     int res = FindString( string );
 609     if (res == -1) return;
 610     SetSelection( res );
 611 }
 612
 613 wxString wxComboBox::GetValue() const
 614 {
 615     GtkEntry *entry = GTK_ENTRY( GTK_COMBO(m_widget)->entry );
 616     wxString tmp( wxGTK_CONV_BACK( gtk_entry_get_text( entry ) ) );
 617
 618 #if 0
 619     for (int i = 0; i < wxStrlen(tmp.c_str()) +1; i++)
 620     {
 621         wxChar c = tmp[i];
 622         printf( "%d ", (int) (c) );
 623     }
 624     printf( "\n" );
 625 #endif
 626
 627     return tmp;
 628 }
 629
 630 void wxComboBox::SetValue( const wxString& value )
 631 {
 632     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 633
 634     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 635     wxString tmp = wxT("");
 636     if (!value.IsNull()) tmp = value;
 637     gtk_entry_set_text( GTK_ENTRY(entry), wxGTK_CONV( tmp ) );
 638 }
 639
 640 void wxComboBox::Copy()
 641 {
 642     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 643
 644     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 645     gtk_editable_copy_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 646 }
 647
 648 void wxComboBox::Cut()
 649 {
 650     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 651
 652     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 653     gtk_editable_cut_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 654 }
 655
 656 void wxComboBox::Paste()
 657 {
 658     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 659
 660     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 661     gtk_editable_paste_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG);
 662 }
 663
 664 void wxComboBox::SetInsertionPoint( long pos )
 665 {
 666     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 667
 668     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 669     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
 670 }
 671
 672 void wxComboBox::SetInsertionPointEnd()
 673 {
 674     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 675
 676     SetInsertionPoint( -1 );
 677 }
 678
 679 long wxComboBox::GetInsertionPoint() const
 680 {
 681     return (long) GET_EDITABLE_POS( GTK_COMBO(m_widget)->entry );
 682 }
 683
 684 long wxComboBox::GetLastPosition() const
 685 {
 686     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 687     int pos = GTK_ENTRY(entry)->text_length;
 688     return (long) pos-1;
 689 }
 690
 691 void wxComboBox::Replace( long from, long to, const wxString& value )
 692 {
 693     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 694
 695     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 696     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 697     if (value.IsNull()) return;
 698     gint pos = (gint)to;
 699
 700 #if wxUSE_UNICODE
 701     wxCharBuffer buffer = wxConvUTF8.cWX2MB( value );
 702     gtk_editable_insert_text( GTK_EDITABLE(entry), (const char*) buffer, strlen( (const char*) buffer ), &pos );
 703 #else
 704     gtk_editable_insert_text( GTK_EDITABLE(entry), value.c_str(), value.Length(), &pos );
 705 #endif
 706 }
 707
 708 void wxComboBox::Remove(long from, long to)
 709 {
 710     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 711
 712     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 713     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 714 }
 715
 716 void wxComboBox::SetSelection( long from, long to )
 717 {
 718     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 719     gtk_editable_select_region( GTK_EDITABLE(entry), (gint)from, (gint)to );
 720 }
 721
 722 void wxComboBox::SetEditable( bool editable )
 723 {
 724     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 725     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 726 }
 727
 728 void wxComboBox::OnChar( wxKeyEvent &event )
 729 {
 730     if ( event.GetKeyCode() == WXK_RETURN )
 731     {
 732         // GTK automatically selects an item if its in the list
 733         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, GetId());
 734         event.SetString( GetValue() );
 735         event.SetInt( GetSelection() );
 736         event.SetEventObject( this );
 737
 738         if (!GetEventHandler()->ProcessEvent( event ))
 739         {
 740             // This will invoke the dialog default action, such
 741             // as the clicking the default button.
 742
 743             wxWindow *top_frame = m_parent;
 744             while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 745                 top_frame = top_frame->GetParent();
 746
 747             if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 748             {
 749                 GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 750
 751                 if (window->default_widget)
 752                     gtk_widget_activate (window->default_widget);
 753             }
 754         }
 755
 756         // Catch GTK event so that GTK doesn't open the drop
 757         // down list upon RETURN.
 758         return;
 759     }
 760
 761     event.Skip();
 762 }
 763
 764 void wxComboBox::DisableEvents()
 765 {
 766     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->list),
 767       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 768     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->entry),
 769       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 770 }
 771
 772 void wxComboBox::EnableEvents()
 773 {
 774     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(m_widget)->list), "select-child",
 775       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 776     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
 777       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 778 }
 779
 780 void wxComboBox::OnSize( wxSizeEvent &event )
 781 {
 782     event.Skip();
 783
 784 #if 0
 785     int w = 21;
 786     gtk_widget_set_usize( GTK_COMBO(m_widget)->entry, m_width-w-1, m_height );
 787
 788     gtk_widget_set_uposition( GTK_COMBO(m_widget)->button, m_x+m_width-w, m_y );
 789     gtk_widget_set_usize( GTK_COMBO(m_widget)->button, w, m_height );
 790 #endif // 0
 791 }
 792
 793 void wxComboBox::ApplyWidgetStyle()
 794 {
 795     SetWidgetStyle();
 796
 797 //    gtk_widget_set_style( GTK_COMBO(m_widget)->button, m_widgetStyle );
 798     gtk_widget_set_style( GTK_COMBO(m_widget)->entry, m_widgetStyle );
 799     gtk_widget_set_style( GTK_COMBO(m_widget)->list, m_widgetStyle );
 800
 801     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 802     GList *child = list->children;
 803     while (child)
 804     {
 805         gtk_widget_set_style( GTK_WIDGET(child->data), m_widgetStyle );
 806
 807         GtkBin *bin = GTK_BIN(child->data);
 808         gtk_widget_set_style( bin->child, m_widgetStyle );
 809
 810         child = child->next;
 811     }
 812 }
 813
 814 GtkWidget* wxComboBox::GetConnectWidget()
 815 {
 816     return GTK_COMBO(m_widget)->entry;
 817 }
 818
 819 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 820 {
 821     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 822              (window == GTK_COMBO(m_widget)->button->window ) );
 823 }
 824
 825 wxSize wxComboBox::DoGetBestSize() const
 826 {
 827     wxSize ret( wxControl::DoGetBestSize() );
 828
 829     // we know better our horizontal extent: it depends on the longest string
 830     // in the combobox
 831     ret.x = 0;
 832     if ( m_widget )
 833     {
 834         int width;
 835         size_t count = GetCount();
 836         for ( size_t n = 0; n < count; n++ )
 837         {
 838             GetTextExtent( GetString(n), &width, NULL, NULL, NULL, &m_font );
 839             if ( width > ret.x )
 840                 ret.x = width;
 841         }
 842     }
 843
 844     // empty combobox should have some reasonable default size too
 845     if ( ret.x < 100 )
 846         ret.x = 100;
 847     return ret;
 848 }
 849
 850 #endif