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 = wxID_NONE; // this means the popup is hidden
  42
  43 //-----------------------------------------------------------------------------
  44 //  "changed" - typing and list item matches get changed, select-child
  45 //              if it doesn't match an item then just get a single changed
  46 //-----------------------------------------------------------------------------
  47
  48 extern "C" {
  49 static void
  50 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  51 {
  52     if (g_isIdle) wxapp_install_idle_handler();
  53
  54     if (combo->m_ignoreNextUpdate)
  55     {
  56         combo->m_ignoreNextUpdate = false;
  57         return;
  58     }
  59
  60     if (!combo->m_hasVMT) return;
  61
  62     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  63     event.SetString( combo->GetValue() );
  64     event.SetEventObject( combo );
  65     combo->GetEventHandler()->ProcessEvent( event );
  66 }
  67 }
  68
  69 extern "C" {
  70 static void
  71 gtk_dummy_callback(GtkEntry *WXUNUSED(entry), GtkCombo *WXUNUSED(combo))
  72 {
  73 }
  74 }
  75
  76 extern "C" {
  77 static void
  78 gtk_popup_hide_callback(GtkCombo *WXUNUSED(gtk_combo), wxComboBox *combo)
  79 {
  80     // when the popup is hidden, throw a SELECTED event only if the combobox
  81     // selection changed.
  82     int curSelection = combo->GetCurrentSelection();
  83     if (g_SelectionBeforePopup != curSelection)
  84     {
  85         wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
  86         event.SetInt( curSelection );
  87         event.SetString( combo->GetStringSelection() );
  88         event.SetEventObject( combo );
  89         combo->GetEventHandler()->ProcessEvent( event );
  90     }
  91
  92     // reset the selection flag to value meaning that it is hidden
  93     g_SelectionBeforePopup = wxID_NONE;
  94 }
  95 }
  96
  97 extern "C" {
  98 static void
  99 gtk_popup_show_callback(GtkCombo *WXUNUSED(gtk_combo), wxComboBox *combo)
 100 {
 101     // store the combobox selection value before the popup is shown
 102     g_SelectionBeforePopup = combo->GetCurrentSelection();
 103 }
 104 }
 105
 106 //-----------------------------------------------------------------------------
 107 // "select-child" - click/cursor get select-child, changed, select-child
 108 //-----------------------------------------------------------------------------
 109
 110 extern "C" {
 111 static void
 112 gtk_combo_select_child_callback( GtkList *WXUNUSED(list), GtkWidget *WXUNUSED(widget), wxComboBox *combo )
 113 {
 114     if (g_isIdle) wxapp_install_idle_handler();
 115
 116     if (!combo->m_hasVMT) return;
 117
 118     if (g_blockEventsOnDrag) return;
 119
 120     int curSelection = combo->GetCurrentSelection();
 121
 122     if (combo->m_prevSelection == curSelection) return;
 123
 124     GtkWidget *list = GTK_COMBO(combo->m_widget)->list;
 125     gtk_list_unselect_item( GTK_LIST(list), combo->m_prevSelection );
 126
 127     combo->m_prevSelection = curSelection;
 128
 129     // Quickly set the value of the combo box
 130     // as GTK+ does that only AFTER the event
 131     // is sent.
 132     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(combo->GetHandle())->entry),
 133       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)combo );
 134     combo->SetValue( combo->GetStringSelection() );
 135     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(combo->GetHandle())->entry), "changed",
 136       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)combo );
 137
 138     // throw a SELECTED event only if the combobox popup is hidden (wxID_NONE)
 139     // because when combobox popup is shown, gtk_combo_select_child_callback is
 140     // called each times the mouse is over an item with a pressed button so a lot
 141     // of SELECTED event could be generated if the user keep the mouse button down
 142     // and select other items ...
 143     if (g_SelectionBeforePopup == wxID_NONE)
 144     {
 145         wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
 146         event.SetInt( curSelection );
 147         event.SetString( combo->GetStringSelection() );
 148         event.SetEventObject( combo );
 149         combo->GetEventHandler()->ProcessEvent( event );
 150
 151         // for consistencu with the other ports, don't generate text update
 152         // events while the user is browsing the combobox neither
 153         wxCommandEvent event2( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
 154         event2.SetString( combo->GetValue() );
 155         event2.SetEventObject( combo );
 156         combo->GetEventHandler()->ProcessEvent( event2 );
 157     }
 158 }
 159 }
 160
 161 //-----------------------------------------------------------------------------
 162 // wxComboBox
 163 //-----------------------------------------------------------------------------
 164
 165 IMPLEMENT_DYNAMIC_CLASS(wxComboBox,wxControl)
 166
 167 BEGIN_EVENT_TABLE(wxComboBox, wxControl)
 168     EVT_SIZE(wxComboBox::OnSize)
 169     EVT_CHAR(wxComboBox::OnChar)
 170
 171     EVT_MENU(wxID_CUT, wxComboBox::OnCut)
 172     EVT_MENU(wxID_COPY, wxComboBox::OnCopy)
 173     EVT_MENU(wxID_PASTE, wxComboBox::OnPaste)
 174     EVT_MENU(wxID_UNDO, wxComboBox::OnUndo)
 175     EVT_MENU(wxID_REDO, wxComboBox::OnRedo)
 176     EVT_MENU(wxID_CLEAR, wxComboBox::OnDelete)
 177     EVT_MENU(wxID_SELECTALL, wxComboBox::OnSelectAll)
 178
 179     EVT_UPDATE_UI(wxID_CUT, wxComboBox::OnUpdateCut)
 180     EVT_UPDATE_UI(wxID_COPY, wxComboBox::OnUpdateCopy)
 181     EVT_UPDATE_UI(wxID_PASTE, wxComboBox::OnUpdatePaste)
 182     EVT_UPDATE_UI(wxID_UNDO, wxComboBox::OnUpdateUndo)
 183     EVT_UPDATE_UI(wxID_REDO, wxComboBox::OnUpdateRedo)
 184     EVT_UPDATE_UI(wxID_CLEAR, wxComboBox::OnUpdateDelete)
 185     EVT_UPDATE_UI(wxID_SELECTALL, wxComboBox::OnUpdateSelectAll)
 186 END_EVENT_TABLE()
 187
 188 bool wxComboBox::Create( wxWindow *parent, wxWindowID id,
 189                          const wxString& value,
 190                          const wxPoint& pos, const wxSize& size,
 191                          const wxArrayString& choices,
 192                          long style, const wxValidator& validator,
 193                          const wxString& name )
 194 {
 195     wxCArrayString chs(choices);
 196
 197     return Create( parent, id, value, pos, size, chs.GetCount(),
 198                    chs.GetStrings(), style, validator, name );
 199 }
 200
 201 bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
 202                          const wxPoint& pos, const wxSize& size,
 203                          int n, const wxString choices[],
 204                          long style, const wxValidator& validator,
 205                          const wxString& name )
 206 {
 207     m_ignoreNextUpdate = false;
 208     m_needParent = true;
 209     m_acceptsFocus = true;
 210     m_prevSelection = 0;
 211
 212     if (!PreCreation( parent, pos, size ) ||
 213         !CreateBase( parent, id, pos, size, style, validator, name ))
 214     {
 215         wxFAIL_MSG( wxT("wxComboBox creation failed") );
 216         return false;
 217     }
 218
 219     m_widget = gtk_combo_new();
 220     GtkCombo *combo = GTK_COMBO(m_widget);
 221
 222     // Disable GTK's broken events ...
 223     gtk_signal_disconnect( GTK_OBJECT(combo->entry), combo->entry_change_id );
 224     // ... and add surogate handler.
 225     combo->entry_change_id = gtk_signal_connect (GTK_OBJECT (combo->entry), "changed",
 226                   (GtkSignalFunc) gtk_dummy_callback, combo);
 227
 228     // make it more useable
 229     gtk_combo_set_use_arrows_always( GTK_COMBO(m_widget), TRUE );
 230
 231     // and case-sensitive
 232     gtk_combo_set_case_sensitive( GTK_COMBO(m_widget), TRUE );
 233
 234 #ifdef __WXGTK20__
 235     if (style & wxNO_BORDER)
 236         g_object_set( GTK_ENTRY( combo->entry ), "has-frame", FALSE, NULL );
 237 #endif
 238
 239     GtkWidget *list = GTK_COMBO(m_widget)->list;
 240
 241 #ifndef __WXGTK20__
 242     // gtk_list_set_selection_mode( GTK_LIST(list), GTK_SELECTION_MULTIPLE );
 243 #endif
 244
 245     for (int i = 0; i < n; i++)
 246     {
 247         GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( choices[i] ) );
 248
 249         m_clientDataList.Append( (wxObject*)NULL );
 250         m_clientObjectList.Append( (wxObject*)NULL );
 251
 252         gtk_container_add( GTK_CONTAINER(list), list_item );
 253
 254         gtk_widget_show( list_item );
 255     }
 256
 257     m_parent->DoAddChild( this );
 258
 259     m_focusWidget = combo->entry;
 260
 261     PostCreation(size);
 262
 263     ConnectWidget( combo->button );
 264
 265     // MSW's combo box shows the value and the selection is -1
 266     gtk_entry_set_text( GTK_ENTRY(combo->entry), wxGTK_CONV(value) );
 267     gtk_list_unselect_all( GTK_LIST(combo->list) );
 268
 269     if (style & wxCB_READONLY)
 270         gtk_entry_set_editable( GTK_ENTRY( combo->entry ), FALSE );
 271
 272     // "show" and "hide" events are generated when user click on the combobox button which popups a list
 273     // this list is the "popwin" gtk widget
 274     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "hide",
 275                         GTK_SIGNAL_FUNC(gtk_popup_hide_callback), (gpointer)this );
 276     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "show",
 277                         GTK_SIGNAL_FUNC(gtk_popup_show_callback), (gpointer)this );
 278
 279     gtk_signal_connect_after( GTK_OBJECT(combo->entry), "changed",
 280       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 281
 282     gtk_signal_connect_after( GTK_OBJECT(combo->list), "select-child",
 283       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 284
 285     SetBestSize(size); // need this too because this is a wxControlWithItems
 286
 287     // This is required for tool bar support
 288 //    wxSize setsize = GetSize();
 289 //    gtk_widget_set_usize( m_widget, setsize.x, setsize.y );
 290
 291     return true;
 292 }
 293
 294 wxComboBox::~wxComboBox()
 295 {
 296     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 297     while (node)
 298     {
 299         wxClientData *cd = (wxClientData*)node->GetData();
 300         if (cd) delete cd;
 301         node = node->GetNext();
 302     }
 303     m_clientObjectList.Clear();
 304
 305     m_clientDataList.Clear();
 306 }
 307
 308 void wxComboBox::SetFocus()
 309 {
 310     if ( m_hasFocus )
 311     {
 312         // don't do anything if we already have focus
 313         return;
 314     }
 315
 316     gtk_widget_grab_focus( m_focusWidget );
 317 }
 318
 319 int wxComboBox::DoAppend( const wxString &item )
 320 {
 321     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 322
 323     DisableEvents();
 324
 325     GtkWidget *list = GTK_COMBO(m_widget)->list;
 326
 327     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 328
 329     gtk_container_add( GTK_CONTAINER(list), list_item );
 330
 331     if (GTK_WIDGET_REALIZED(m_widget))
 332     {
 333         gtk_widget_realize( list_item );
 334         gtk_widget_realize( GTK_BIN(list_item)->child );
 335     }
 336
 337     // Apply current widget style to the new list_item
 338     GtkRcStyle *style = CreateWidgetStyle();
 339     if (style)
 340     {
 341         gtk_widget_modify_style( GTK_WIDGET( list_item ), style );
 342         GtkBin *bin = GTK_BIN( list_item );
 343         GtkWidget *label = GTK_WIDGET( bin->child );
 344         gtk_widget_modify_style( label, style );
 345         gtk_rc_style_unref( style );
 346     }
 347
 348     gtk_widget_show( list_item );
 349
 350     const int count = GetCount();
 351
 352     if ( (int)m_clientDataList.GetCount() < count )
 353         m_clientDataList.Append( (wxObject*) NULL );
 354     if ( (int)m_clientObjectList.GetCount() < count )
 355         m_clientObjectList.Append( (wxObject*) NULL );
 356
 357     EnableEvents();
 358
 359     InvalidateBestSize();
 360
 361     return count - 1;
 362 }
 363
 364 int wxComboBox::DoInsert( const wxString &item, int pos )
 365 {
 366     wxCHECK_MSG( !(GetWindowStyle() & wxCB_SORT), -1,
 367                     wxT("can't insert into sorted list"));
 368
 369     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 370
 371     int count = GetCount();
 372     wxCHECK_MSG( (pos >= 0) && (pos <= count), -1, wxT("invalid index") );
 373
 374     if (pos == count)
 375         return Append(item);
 376
 377     DisableEvents();
 378
 379     GtkWidget *list = GTK_COMBO(m_widget)->list;
 380
 381     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 382
 383     GList *gitem_list = g_list_alloc ();
 384     gitem_list->data = list_item;
 385     gtk_list_insert_items( GTK_LIST (list), gitem_list, pos );
 386
 387     if (GTK_WIDGET_REALIZED(m_widget))
 388     {
 389         gtk_widget_realize( list_item );
 390         gtk_widget_realize( GTK_BIN(list_item)->child );
 391
 392         ApplyWidgetStyle();
 393     }
 394
 395     gtk_widget_show( list_item );
 396
 397     count = GetCount();
 398
 399     if ( (int)m_clientDataList.GetCount() < count )
 400         m_clientDataList.Insert( pos, (wxObject*) NULL );
 401     if ( (int)m_clientObjectList.GetCount() < count )
 402         m_clientObjectList.Insert( pos, (wxObject*) NULL );
 403
 404     EnableEvents();
 405
 406     InvalidateBestSize();
 407
 408     return pos;
 409 }
 410
 411 void wxComboBox::DoSetItemClientData( int n, void* clientData )
 412 {
 413     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 414
 415     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 416     if (!node) return;
 417
 418     node->SetData( (wxObject*) clientData );
 419 }
 420
 421 void* wxComboBox::DoGetItemClientData( int n ) const
 422 {
 423     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 424
 425     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 426
 427     return node ? node->GetData() : NULL;
 428 }
 429
 430 void wxComboBox::DoSetItemClientObject( int n, wxClientData* clientData )
 431 {
 432     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 433
 434     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 435     if (!node) return;
 436
 437     // wxItemContainer already deletes data for us
 438
 439     node->SetData( (wxObject*) clientData );
 440 }
 441
 442 wxClientData* wxComboBox::DoGetItemClientObject( int n ) const
 443 {
 444     wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, wxT("invalid combobox") );
 445
 446     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 447
 448     return node ? (wxClientData*) node->GetData() : NULL;
 449 }
 450
 451 void wxComboBox::Clear()
 452 {
 453     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 454
 455     DisableEvents();
 456
 457     GtkWidget *list = GTK_COMBO(m_widget)->list;
 458     gtk_list_clear_items( GTK_LIST(list), 0, GetCount() );
 459
 460     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 461     while (node)
 462     {
 463         wxClientData *cd = (wxClientData*)node->GetData();
 464         if (cd) delete cd;
 465         node = node->GetNext();
 466     }
 467     m_clientObjectList.Clear();
 468
 469     m_clientDataList.Clear();
 470
 471     EnableEvents();
 472
 473     InvalidateBestSize();
 474 }
 475
 476 void wxComboBox::Delete( int n )
 477 {
 478     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 479
 480     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 481
 482     GList *child = g_list_nth( listbox->children, n );
 483
 484     if (!child)
 485     {
 486         wxFAIL_MSG(wxT("wrong index"));
 487         return;
 488     }
 489
 490     DisableEvents();
 491
 492     GList *list = g_list_append( (GList*) NULL, child->data );
 493     gtk_list_remove_items( listbox, list );
 494     g_list_free( list );
 495
 496     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 497     if (node)
 498     {
 499         wxClientData *cd = (wxClientData*)node->GetData();
 500         if (cd) delete cd;
 501         m_clientObjectList.Erase( node );
 502     }
 503
 504     node = m_clientDataList.Item( n );
 505     if (node)
 506         m_clientDataList.Erase( node );
 507
 508     EnableEvents();
 509
 510     InvalidateBestSize();
 511 }
 512
 513 void wxComboBox::SetString(int n, const wxString &text)
 514 {
 515     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 516
 517     GtkWidget *list = GTK_COMBO(m_widget)->list;
 518
 519     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 520     if (child)
 521     {
 522         GtkBin *bin = GTK_BIN( child->data );
 523         GtkLabel *label = GTK_LABEL( bin->child );
 524         gtk_label_set_text(label, wxGTK_CONV(text));
 525     }
 526     else
 527     {
 528         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 529     }
 530
 531     InvalidateBestSize();
 532 }
 533
 534 int wxComboBox::FindString( const wxString &item ) const
 535 {
 536     wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid combobox") );
 537
 538     GtkWidget *list = GTK_COMBO(m_widget)->list;
 539
 540     GList *child = GTK_LIST(list)->children;
 541     int count = 0;
 542     while (child)
 543     {
 544         GtkBin *bin = GTK_BIN( child->data );
 545         GtkLabel *label = GTK_LABEL( bin->child );
 546 #ifdef __WXGTK20__
 547         wxString str( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 548 #else
 549         wxString str( label->label );
 550 #endif
 551         if (item == str)
 552             return count;
 553
 554         count++;
 555         child = child->next;
 556     }
 557
 558     return wxNOT_FOUND;
 559 }
 560
 561 int wxComboBox::GetSelection() const
 562 {
 563     // if the popup is currently opened, use the selection as it had been
 564     // before it dropped down
 565     return g_SelectionBeforePopup == wxID_NONE ? GetCurrentSelection()
 566                                                : g_SelectionBeforePopup;
 567 }
 568
 569 int wxComboBox::GetCurrentSelection() const
 570 {
 571     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 572
 573     GtkWidget *list = GTK_COMBO(m_widget)->list;
 574
 575     GList *selection = GTK_LIST(list)->selection;
 576     if (selection)
 577     {
 578         GList *child = GTK_LIST(list)->children;
 579         int count = 0;
 580         while (child)
 581         {
 582             if (child->data == selection->data) return count;
 583             count++;
 584             child = child->next;
 585         }
 586     }
 587
 588     return -1;
 589 }
 590
 591 wxString wxComboBox::GetString( int n ) const
 592 {
 593     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 594
 595     GtkWidget *list = GTK_COMBO(m_widget)->list;
 596
 597     wxString str;
 598     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 599     if (child)
 600     {
 601         GtkBin *bin = GTK_BIN( child->data );
 602         GtkLabel *label = GTK_LABEL( bin->child );
 603 #ifdef __WXGTK20__
 604         str = wxGTK_CONV_BACK( gtk_label_get_text(label) );
 605 #else
 606         str = wxString( label->label );
 607 #endif
 608     }
 609     else
 610     {
 611         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 612     }
 613
 614     return str;
 615 }
 616
 617 wxString wxComboBox::GetStringSelection() const
 618 {
 619     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 620
 621     GtkWidget *list = GTK_COMBO(m_widget)->list;
 622
 623     GList *selection = GTK_LIST(list)->selection;
 624     if (selection)
 625     {
 626         GtkBin *bin = GTK_BIN( selection->data );
 627         GtkLabel *label = GTK_LABEL( bin->child );
 628 #ifdef __WXGTK20__
 629         wxString tmp( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 630 #else
 631         wxString tmp( label->label );
 632 #endif
 633         return tmp;
 634     }
 635
 636     wxFAIL_MSG( wxT("wxComboBox: no selection") );
 637
 638     return wxEmptyString;
 639 }
 640
 641 int wxComboBox::GetCount() const
 642 {
 643     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 644
 645     GtkWidget *list = GTK_COMBO(m_widget)->list;
 646
 647     GList *child = GTK_LIST(list)->children;
 648     int count = 0;
 649     while (child) { count++; child = child->next; }
 650     return count;
 651 }
 652
 653 void wxComboBox::SetSelection( int n )
 654 {
 655     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 656
 657     DisableEvents();
 658
 659     GtkWidget *list = GTK_COMBO(m_widget)->list;
 660     gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 661     gtk_list_select_item( GTK_LIST(list), n );
 662     m_prevSelection = n;
 663
 664     EnableEvents();
 665 }
 666
 667 wxString wxComboBox::GetValue() const
 668 {
 669     GtkEntry *entry = GTK_ENTRY( GTK_COMBO(m_widget)->entry );
 670     wxString tmp( wxGTK_CONV_BACK( gtk_entry_get_text( entry ) ) );
 671
 672 #if 0
 673     for (int i = 0; i < wxStrlen(tmp.c_str()) +1; i++)
 674     {
 675         wxChar c = tmp[i];
 676         printf( "%d ", (int) (c) );
 677     }
 678     printf( "\n" );
 679 #endif
 680
 681     return tmp;
 682 }
 683
 684 void wxComboBox::SetValue( const wxString& value )
 685 {
 686     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 687
 688     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 689     wxString tmp;
 690     if (!value.IsNull()) tmp = value;
 691     gtk_entry_set_text( GTK_ENTRY(entry), wxGTK_CONV( tmp ) );
 692
 693     InvalidateBestSize();
 694 }
 695
 696 void wxComboBox::Copy()
 697 {
 698     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 699
 700     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 701     gtk_editable_copy_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 702 }
 703
 704 void wxComboBox::Cut()
 705 {
 706     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 707
 708     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 709     gtk_editable_cut_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 710 }
 711
 712 void wxComboBox::Paste()
 713 {
 714     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 715
 716     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 717     gtk_editable_paste_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG);
 718 }
 719
 720 void wxComboBox::Undo()
 721 {
 722     // TODO
 723 }
 724
 725 void wxComboBox::Redo()
 726 {
 727     // TODO
 728 }
 729
 730 void wxComboBox::SelectAll()
 731 {
 732     SetSelection(0, GetLastPosition());
 733 }
 734
 735 bool wxComboBox::CanUndo() const
 736 {
 737     // TODO
 738     return false;
 739 }
 740
 741 bool wxComboBox::CanRedo() const
 742 {
 743     // TODO
 744     return false;
 745 }
 746
 747 bool wxComboBox::HasSelection() const
 748 {
 749     long from, to;
 750     GetSelection(&from, &to);
 751     return from != to;
 752 }
 753
 754 bool wxComboBox::CanCopy() const
 755 {
 756     // Can copy if there's a selection
 757     return HasSelection();
 758 }
 759
 760 bool wxComboBox::CanCut() const
 761 {
 762     return CanCopy() && IsEditable();
 763 }
 764
 765 bool wxComboBox::CanPaste() const
 766 {
 767     // TODO: check for text on the clipboard
 768     return IsEditable() ;
 769 }
 770
 771 bool wxComboBox::IsEditable() const
 772 {
 773     return !HasFlag(wxCB_READONLY);
 774 }
 775
 776
 777 void wxComboBox::SetInsertionPoint( long pos )
 778 {
 779     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 780
 781     if ( pos == GetLastPosition() )
 782         pos = -1;
 783
 784     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 785     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
 786 }
 787
 788 long wxComboBox::GetInsertionPoint() const
 789 {
 790     return (long) GET_EDITABLE_POS( GTK_COMBO(m_widget)->entry );
 791 }
 792
 793 wxTextPos wxComboBox::GetLastPosition() const
 794 {
 795     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 796     int pos = GTK_ENTRY(entry)->text_length;
 797     return (long) pos-1;
 798 }
 799
 800 void wxComboBox::Replace( long from, long to, const wxString& value )
 801 {
 802     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 803
 804     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 805     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 806     if (value.IsNull()) return;
 807     gint pos = (gint)to;
 808
 809 #if wxUSE_UNICODE
 810     wxCharBuffer buffer = wxConvUTF8.cWX2MB( value );
 811     gtk_editable_insert_text( GTK_EDITABLE(entry), (const char*) buffer, strlen( (const char*) buffer ), &pos );
 812 #else
 813     gtk_editable_insert_text( GTK_EDITABLE(entry), value.c_str(), value.Length(), &pos );
 814 #endif
 815 }
 816
 817 void wxComboBox::SetSelection( long from, long to )
 818 {
 819     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 820     gtk_editable_select_region( GTK_EDITABLE(entry), (gint)from, (gint)to );
 821 }
 822
 823 void wxComboBox::GetSelection( long* from, long* to ) const
 824 {
 825     if (IsEditable())
 826     {
 827         GtkEditable *editable = GTK_EDITABLE(GTK_COMBO(m_widget)->entry);
 828 #ifdef __WXGTK20__
 829         gint start, end;
 830         gtk_editable_get_selection_bounds(editable, & start, & end);
 831         *from = start;
 832         *to = end;
 833 #else
 834         *from = (long) editable->selection_start_pos;
 835         *to = (long) editable->selection_end_pos;
 836 #endif
 837     }
 838 }
 839
 840 void wxComboBox::SetEditable( bool editable )
 841 {
 842     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 843     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 844 }
 845
 846 void wxComboBox::OnChar( wxKeyEvent &event )
 847 {
 848     if ( event.GetKeyCode() == WXK_RETURN )
 849     {
 850         // GTK automatically selects an item if its in the list
 851         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, GetId());
 852         event.SetString( GetValue() );
 853         event.SetInt( GetSelection() );
 854         event.SetEventObject( this );
 855
 856         if (!GetEventHandler()->ProcessEvent( event ))
 857         {
 858             // This will invoke the dialog default action, such
 859             // as the clicking the default button.
 860
 861             wxWindow *top_frame = m_parent;
 862             while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 863                 top_frame = top_frame->GetParent();
 864
 865             if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 866             {
 867                 GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 868
 869                 if (window->default_widget)
 870                         gtk_widget_activate (window->default_widget);
 871             }
 872         }
 873
 874         // Catch GTK event so that GTK doesn't open the drop
 875         // down list upon RETURN.
 876         return;
 877     }
 878
 879     event.Skip();
 880 }
 881
 882 void wxComboBox::DisableEvents()
 883 {
 884     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->list),
 885       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 886     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->entry),
 887       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 888 }
 889
 890 void wxComboBox::EnableEvents()
 891 {
 892     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(m_widget)->list), "select-child",
 893       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 894     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
 895       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 896 }
 897
 898 void wxComboBox::OnSize( wxSizeEvent &event )
 899 {
 900     // NB: In some situations (e.g. on non-first page of a wizard, if the
 901     //     size used is default size), GtkCombo widget is resized correctly,
 902     //     but it's look is not updated, it's rendered as if it was much wider.
 903     //     No other widgets are affected, so it looks like a bug in GTK+.
 904     //     Manually requesting resize calculation (as gtk_pizza_set_size does)
 905     //     fixes it.
 906     if (GTK_WIDGET_VISIBLE(m_widget))
 907         gtk_widget_queue_resize(m_widget);
 908
 909     event.Skip();
 910 }
 911
 912 void wxComboBox::DoApplyWidgetStyle(GtkRcStyle *style)
 913 {
 914 //    gtk_widget_modify_style( GTK_COMBO(m_widget)->button, syle );
 915
 916     gtk_widget_modify_style( GTK_COMBO(m_widget)->entry, style );
 917     gtk_widget_modify_style( GTK_COMBO(m_widget)->list, style );
 918
 919     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 920     GList *child = list->children;
 921     while (child)
 922     {
 923         gtk_widget_modify_style( GTK_WIDGET(child->data), style );
 924
 925         GtkBin *bin = GTK_BIN(child->data);
 926         gtk_widget_modify_style( bin->child, style );
 927
 928         child = child->next;
 929     }
 930 }
 931
 932 GtkWidget* wxComboBox::GetConnectWidget()
 933 {
 934     return GTK_COMBO(m_widget)->entry;
 935 }
 936
 937 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 938 {
 939     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 940              (window == GTK_COMBO(m_widget)->button->window ) );
 941 }
 942
 943 wxSize wxComboBox::DoGetBestSize() const
 944 {
 945     wxSize ret( wxControl::DoGetBestSize() );
 946
 947     // we know better our horizontal extent: it depends on the longest string
 948     // in the combobox
 949     if ( m_widget )
 950     {
 951         int width;
 952         size_t count = GetCount();
 953         for ( size_t n = 0; n < count; n++ )
 954         {
 955             GetTextExtent( GetString(n), &width, NULL, NULL, NULL );
 956             if ( width > ret.x )
 957                 ret.x = width;
 958         }
 959     }
 960
 961     // empty combobox should have some reasonable default size too
 962     if ( ret.x < 100 )
 963         ret.x = 100;
 964
 965     CacheBestSize(ret);
 966     return ret;
 967 }
 968
 969 // static
 970 wxVisualAttributes
 971 wxComboBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 972 {
 973     return GetDefaultAttributesFromGTKWidget(gtk_combo_new, true);
 974 }
 975
 976 // ----------------------------------------------------------------------------
 977 // standard event handling
 978 // ----------------------------------------------------------------------------
 979
 980 void wxComboBox::OnCut(wxCommandEvent& WXUNUSED(event))
 981 {
 982     Cut();
 983 }
 984
 985 void wxComboBox::OnCopy(wxCommandEvent& WXUNUSED(event))
 986 {
 987     Copy();
 988 }
 989
 990 void wxComboBox::OnPaste(wxCommandEvent& WXUNUSED(event))
 991 {
 992     Paste();
 993 }
 994
 995 void wxComboBox::OnUndo(wxCommandEvent& WXUNUSED(event))
 996 {
 997     Undo();
 998 }
 999
1000 void wxComboBox::OnRedo(wxCommandEvent& WXUNUSED(event))
1001 {
1002     Redo();
1003 }
1004
1005 void wxComboBox::OnDelete(wxCommandEvent& WXUNUSED(event))
1006 {
1007     long from, to;
1008     GetSelection(& from, & to);
1009     if (from != -1 && to != -1)
1010         Remove(from, to);
1011 }
1012
1013 void wxComboBox::OnSelectAll(wxCommandEvent& WXUNUSED(event))
1014 {
1015     SetSelection(-1, -1);
1016 }
1017
1018 void wxComboBox::OnUpdateCut(wxUpdateUIEvent& event)
1019 {
1020     event.Enable( CanCut() );
1021 }
1022
1023 void wxComboBox::OnUpdateCopy(wxUpdateUIEvent& event)
1024 {
1025     event.Enable( CanCopy() );
1026 }
1027
1028 void wxComboBox::OnUpdatePaste(wxUpdateUIEvent& event)
1029 {
1030     event.Enable( CanPaste() );
1031 }
1032
1033 void wxComboBox::OnUpdateUndo(wxUpdateUIEvent& event)
1034 {
1035     event.Enable( CanUndo() );
1036 }
1037
1038 void wxComboBox::OnUpdateRedo(wxUpdateUIEvent& event)
1039 {
1040     event.Enable( CanRedo() );
1041 }
1042
1043 void wxComboBox::OnUpdateDelete(wxUpdateUIEvent& event)
1044 {
1045     event.Enable(HasSelection() && IsEditable()) ;
1046 }
1047
1048 void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event)
1049 {
1050     event.Enable(GetLastPosition() > 0);
1051 }
1052
1053 #endif