src/gtk/combobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/combobox.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/combobox.h"
  14
  15 #if wxUSE_COMBOBOX
  16
  17 #include "wx/settings.h"
  18 #include "wx/arrstr.h"
  19 #include "wx/intl.h"
  20
  21 #include "wx/textctrl.h"    // for wxEVT_COMMAND_TEXT_UPDATED
  22
  23 #include "wx/gtk/private.h"
  24
  25 //-----------------------------------------------------------------------------
  26 // idle system
  27 //-----------------------------------------------------------------------------
  28
  29 extern void wxapp_install_idle_handler();
  30 extern bool g_isIdle;
  31
  32 //-----------------------------------------------------------------------------
  33 // data
  34 //-----------------------------------------------------------------------------
  35
  36 extern bool   g_blockEventsOnDrag;
  37 static int    g_SelectionBeforePopup = wxID_NONE; // this means the popup is hidden
  38
  39 //-----------------------------------------------------------------------------
  40 //  "changed" - typing and list item matches get changed, select-child
  41 //              if it doesn't match an item then just get a single changed
  42 //-----------------------------------------------------------------------------
  43
  44 extern "C" {
  45 static void
  46 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  47 {
  48     if (g_isIdle) wxapp_install_idle_handler();
  49
  50     if (combo->m_ignoreNextUpdate)
  51     {
  52         combo->m_ignoreNextUpdate = false;
  53         return;
  54     }
  55
  56     if (!combo->m_hasVMT) return;
  57
  58     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  59     event.SetString( combo->GetValue() );
  60     event.SetEventObject( combo );
  61     combo->GetEventHandler()->ProcessEvent( event );
  62 }
  63 }
  64
  65 extern "C" {
  66 static void
  67 gtk_dummy_callback(GtkEntry *WXUNUSED(entry), GtkCombo *WXUNUSED(combo))
  68 {
  69 }
  70 }
  71
  72 extern "C" {
  73 static void
  74 gtk_popup_hide_callback(GtkCombo *WXUNUSED(gtk_combo), wxComboBox *combo)
  75 {
  76     // when the popup is hidden, throw a SELECTED event only if the combobox
  77     // selection changed.
  78     const int curSelection = combo->GetCurrentSelection();
  79
  80     const bool hasChanged = curSelection != g_SelectionBeforePopup;
  81
  82     // reset the selection flag to value meaning that it is hidden and do it
  83     // now, before generating the events, so that GetSelection() returns the
  84     // new value from the event handler
  85     g_SelectionBeforePopup = wxID_NONE;
  86
  87     if ( hasChanged )
  88     {
  89         wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
  90         event.SetInt( curSelection );
  91         event.SetString( combo->GetStringSelection() );
  92         event.SetEventObject( combo );
  93         combo->GetEventHandler()->ProcessEvent( event );
  94
  95         // for consistency with the other ports, send TEXT event
  96         wxCommandEvent event2( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  97         event2.SetString( combo->GetStringSelection() );
  98         event2.SetEventObject( combo );
  99         combo->GetEventHandler()->ProcessEvent( event2 );
 100     }
 101 }
 102 }
 103
 104 extern "C" {
 105 static void
 106 gtk_popup_show_callback(GtkCombo *WXUNUSED(gtk_combo), wxComboBox *combo)
 107 {
 108     // store the combobox selection value before the popup is shown
 109     g_SelectionBeforePopup = combo->GetCurrentSelection();
 110 }
 111 }
 112
 113 //-----------------------------------------------------------------------------
 114 // "select-child" - click/cursor get select-child, changed, select-child
 115 //-----------------------------------------------------------------------------
 116
 117 extern "C" {
 118 static void
 119 gtk_combo_select_child_callback( GtkList *WXUNUSED(list), GtkWidget *WXUNUSED(widget), wxComboBox *combo )
 120 {
 121     if (g_isIdle) wxapp_install_idle_handler();
 122
 123     if (!combo->m_hasVMT) return;
 124
 125     if (g_blockEventsOnDrag) return;
 126
 127     int curSelection = combo->GetCurrentSelection();
 128
 129     if (combo->m_prevSelection == curSelection) return;
 130
 131     GtkWidget *list = GTK_COMBO(combo->m_widget)->list;
 132     gtk_list_unselect_item( GTK_LIST(list), combo->m_prevSelection );
 133
 134     combo->m_prevSelection = curSelection;
 135
 136     // Quickly set the value of the combo box
 137     // as GTK+ does that only AFTER the event
 138     // is sent.
 139     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(combo->GetHandle())->entry),
 140       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)combo );
 141     combo->SetValue( combo->GetStringSelection() );
 142     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(combo->GetHandle())->entry), "changed",
 143       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)combo );
 144
 145     // throw a SELECTED event only if the combobox popup is hidden (wxID_NONE)
 146     // because when combobox popup is shown, gtk_combo_select_child_callback is
 147     // called each times the mouse is over an item with a pressed button so a lot
 148     // of SELECTED event could be generated if the user keep the mouse button down
 149     // and select other items ...
 150     if (g_SelectionBeforePopup == wxID_NONE)
 151     {
 152         wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
 153         event.SetInt( curSelection );
 154         event.SetString( combo->GetStringSelection() );
 155         event.SetEventObject( combo );
 156         combo->GetEventHandler()->ProcessEvent( event );
 157
 158         // for consistency with the other ports, don't generate text update
 159         // events while the user is browsing the combobox neither
 160         wxCommandEvent event2( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
 161         event2.SetString( combo->GetValue() );
 162         event2.SetEventObject( combo );
 163         combo->GetEventHandler()->ProcessEvent( event2 );
 164     }
 165 }
 166 }
 167
 168 //-----------------------------------------------------------------------------
 169 // wxComboBox
 170 //-----------------------------------------------------------------------------
 171
 172 IMPLEMENT_DYNAMIC_CLASS(wxComboBox,wxControl)
 173
 174 BEGIN_EVENT_TABLE(wxComboBox, wxControl)
 175     EVT_SIZE(wxComboBox::OnSize)
 176     EVT_CHAR(wxComboBox::OnChar)
 177
 178     EVT_MENU(wxID_CUT, wxComboBox::OnCut)
 179     EVT_MENU(wxID_COPY, wxComboBox::OnCopy)
 180     EVT_MENU(wxID_PASTE, wxComboBox::OnPaste)
 181     EVT_MENU(wxID_UNDO, wxComboBox::OnUndo)
 182     EVT_MENU(wxID_REDO, wxComboBox::OnRedo)
 183     EVT_MENU(wxID_CLEAR, wxComboBox::OnDelete)
 184     EVT_MENU(wxID_SELECTALL, wxComboBox::OnSelectAll)
 185
 186     EVT_UPDATE_UI(wxID_CUT, wxComboBox::OnUpdateCut)
 187     EVT_UPDATE_UI(wxID_COPY, wxComboBox::OnUpdateCopy)
 188     EVT_UPDATE_UI(wxID_PASTE, wxComboBox::OnUpdatePaste)
 189     EVT_UPDATE_UI(wxID_UNDO, wxComboBox::OnUpdateUndo)
 190     EVT_UPDATE_UI(wxID_REDO, wxComboBox::OnUpdateRedo)
 191     EVT_UPDATE_UI(wxID_CLEAR, wxComboBox::OnUpdateDelete)
 192     EVT_UPDATE_UI(wxID_SELECTALL, wxComboBox::OnUpdateSelectAll)
 193 END_EVENT_TABLE()
 194
 195 bool wxComboBox::Create( wxWindow *parent, wxWindowID id,
 196                          const wxString& value,
 197                          const wxPoint& pos, const wxSize& size,
 198                          const wxArrayString& choices,
 199                          long style, const wxValidator& validator,
 200                          const wxString& name )
 201 {
 202     wxCArrayString chs(choices);
 203
 204     return Create( parent, id, value, pos, size, chs.GetCount(),
 205                    chs.GetStrings(), style, validator, name );
 206 }
 207
 208 bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
 209                          const wxPoint& pos, const wxSize& size,
 210                          int n, const wxString choices[],
 211                          long style, const wxValidator& validator,
 212                          const wxString& name )
 213 {
 214     m_ignoreNextUpdate = false;
 215     m_needParent = true;
 216     m_acceptsFocus = true;
 217     m_prevSelection = 0;
 218
 219     if (!PreCreation( parent, pos, size ) ||
 220         !CreateBase( parent, id, pos, size, style, validator, name ))
 221     {
 222         wxFAIL_MSG( wxT("wxComboBox creation failed") );
 223         return false;
 224     }
 225
 226     m_widget = gtk_combo_new();
 227     GtkCombo *combo = GTK_COMBO(m_widget);
 228
 229     // Disable GTK's broken events ...
 230     gtk_signal_disconnect( GTK_OBJECT(combo->entry), combo->entry_change_id );
 231     // ... and add surrogate handler.
 232     combo->entry_change_id = gtk_signal_connect (GTK_OBJECT (combo->entry), "changed",
 233                   (GtkSignalFunc) gtk_dummy_callback, combo);
 234
 235     // make it more useable
 236     gtk_combo_set_use_arrows_always( GTK_COMBO(m_widget), TRUE );
 237
 238     // and case-sensitive
 239     gtk_combo_set_case_sensitive( GTK_COMBO(m_widget), TRUE );
 240
 241 #ifdef __WXGTK20__
 242     if (style & wxNO_BORDER)
 243         g_object_set( GTK_ENTRY( combo->entry ), "has-frame", FALSE, NULL );
 244 #endif
 245
 246     GtkWidget *list = GTK_COMBO(m_widget)->list;
 247
 248 #ifndef __WXGTK20__
 249     // gtk_list_set_selection_mode( GTK_LIST(list), GTK_SELECTION_MULTIPLE );
 250 #endif
 251
 252     for (int i = 0; i < n; i++)
 253     {
 254         GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( choices[i] ) );
 255
 256         m_clientDataList.Append( (wxObject*)NULL );
 257         m_clientObjectList.Append( (wxObject*)NULL );
 258
 259         gtk_container_add( GTK_CONTAINER(list), list_item );
 260
 261         gtk_widget_show( list_item );
 262     }
 263
 264     m_parent->DoAddChild( this );
 265
 266     m_focusWidget = combo->entry;
 267
 268     PostCreation(size);
 269
 270     ConnectWidget( combo->button );
 271
 272     // MSW's combo box shows the value and the selection is -1
 273     gtk_entry_set_text( GTK_ENTRY(combo->entry), wxGTK_CONV(value) );
 274     gtk_list_unselect_all( GTK_LIST(combo->list) );
 275
 276     if (style & wxCB_READONLY)
 277         gtk_entry_set_editable( GTK_ENTRY( combo->entry ), FALSE );
 278
 279     // "show" and "hide" events are generated when user click on the combobox button which popups a list
 280     // this list is the "popwin" gtk widget
 281     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "hide",
 282                         GTK_SIGNAL_FUNC(gtk_popup_hide_callback), (gpointer)this );
 283     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(combo)->popwin), "show",
 284                         GTK_SIGNAL_FUNC(gtk_popup_show_callback), (gpointer)this );
 285
 286     gtk_signal_connect_after( GTK_OBJECT(combo->entry), "changed",
 287       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 288
 289     gtk_signal_connect_after( GTK_OBJECT(combo->list), "select-child",
 290       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 291
 292     SetBestSize(size); // need this too because this is a wxControlWithItems
 293
 294     // This is required for tool bar support
 295 //    wxSize setsize = GetSize();
 296 //    gtk_widget_set_usize( m_widget, setsize.x, setsize.y );
 297
 298     return true;
 299 }
 300
 301 wxComboBox::~wxComboBox()
 302 {
 303     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 304     while (node)
 305     {
 306         wxClientData *cd = (wxClientData*)node->GetData();
 307         if (cd) delete cd;
 308         node = node->GetNext();
 309     }
 310     m_clientObjectList.Clear();
 311
 312     m_clientDataList.Clear();
 313 }
 314
 315 void wxComboBox::SetFocus()
 316 {
 317     if ( m_hasFocus )
 318     {
 319         // don't do anything if we already have focus
 320         return;
 321     }
 322
 323     gtk_widget_grab_focus( m_focusWidget );
 324 }
 325
 326 int wxComboBox::DoAppend( const wxString &item )
 327 {
 328     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 329
 330     DisableEvents();
 331
 332     GtkWidget *list = GTK_COMBO(m_widget)->list;
 333
 334     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 335
 336     gtk_container_add( GTK_CONTAINER(list), list_item );
 337
 338     if (GTK_WIDGET_REALIZED(m_widget))
 339     {
 340         gtk_widget_realize( list_item );
 341         gtk_widget_realize( GTK_BIN(list_item)->child );
 342     }
 343
 344     // Apply current widget style to the new list_item
 345     GtkRcStyle *style = CreateWidgetStyle();
 346     if (style)
 347     {
 348         gtk_widget_modify_style( GTK_WIDGET( list_item ), style );
 349         GtkBin *bin = GTK_BIN( list_item );
 350         GtkWidget *label = GTK_WIDGET( bin->child );
 351         gtk_widget_modify_style( label, style );
 352         gtk_rc_style_unref( style );
 353     }
 354
 355     gtk_widget_show( list_item );
 356
 357     const int count = GetCount();
 358
 359     if ( (int)m_clientDataList.GetCount() < count )
 360         m_clientDataList.Append( (wxObject*) NULL );
 361     if ( (int)m_clientObjectList.GetCount() < count )
 362         m_clientObjectList.Append( (wxObject*) NULL );
 363
 364     EnableEvents();
 365
 366     InvalidateBestSize();
 367
 368     return count - 1;
 369 }
 370
 371 int wxComboBox::DoInsert( const wxString &item, int pos )
 372 {
 373     wxCHECK_MSG( !(GetWindowStyle() & wxCB_SORT), -1,
 374                     wxT("can't insert into sorted list"));
 375
 376     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 377
 378     int count = GetCount();
 379     wxCHECK_MSG( (pos >= 0) && (pos <= count), -1, wxT("invalid index") );
 380
 381     if (pos == count)
 382         return Append(item);
 383
 384     DisableEvents();
 385
 386     GtkWidget *list = GTK_COMBO(m_widget)->list;
 387
 388     GtkWidget *list_item = gtk_list_item_new_with_label( wxGTK_CONV( item ) );
 389
 390     GList *gitem_list = g_list_alloc ();
 391     gitem_list->data = list_item;
 392     gtk_list_insert_items( GTK_LIST (list), gitem_list, pos );
 393
 394     if (GTK_WIDGET_REALIZED(m_widget))
 395     {
 396         gtk_widget_realize( list_item );
 397         gtk_widget_realize( GTK_BIN(list_item)->child );
 398
 399         ApplyWidgetStyle();
 400     }
 401
 402     gtk_widget_show( list_item );
 403
 404     count = GetCount();
 405
 406     if ( (int)m_clientDataList.GetCount() < count )
 407         m_clientDataList.Insert( pos, (wxObject*) NULL );
 408     if ( (int)m_clientObjectList.GetCount() < count )
 409         m_clientObjectList.Insert( pos, (wxObject*) NULL );
 410
 411     EnableEvents();
 412
 413     InvalidateBestSize();
 414
 415     return pos;
 416 }
 417
 418 void wxComboBox::DoSetItemClientData( int n, void* clientData )
 419 {
 420     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 421
 422     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 423     if (!node) return;
 424
 425     node->SetData( (wxObject*) clientData );
 426 }
 427
 428 void* wxComboBox::DoGetItemClientData( int n ) const
 429 {
 430     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 431
 432     wxList::compatibility_iterator node = m_clientDataList.Item( n );
 433
 434     return node ? node->GetData() : NULL;
 435 }
 436
 437 void wxComboBox::DoSetItemClientObject( int n, wxClientData* clientData )
 438 {
 439     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 440
 441     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 442     if (!node) return;
 443
 444     // wxItemContainer already deletes data for us
 445
 446     node->SetData( (wxObject*) clientData );
 447 }
 448
 449 wxClientData* wxComboBox::DoGetItemClientObject( int n ) const
 450 {
 451     wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, wxT("invalid combobox") );
 452
 453     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 454
 455     return node ? (wxClientData*) node->GetData() : NULL;
 456 }
 457
 458 void wxComboBox::Clear()
 459 {
 460     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 461
 462     DisableEvents();
 463
 464     GtkWidget *list = GTK_COMBO(m_widget)->list;
 465     gtk_list_clear_items( GTK_LIST(list), 0, GetCount() );
 466
 467     wxList::compatibility_iterator node = m_clientObjectList.GetFirst();
 468     while (node)
 469     {
 470         wxClientData *cd = (wxClientData*)node->GetData();
 471         if (cd) delete cd;
 472         node = node->GetNext();
 473     }
 474     m_clientObjectList.Clear();
 475
 476     m_clientDataList.Clear();
 477
 478     EnableEvents();
 479
 480     InvalidateBestSize();
 481 }
 482
 483 void wxComboBox::Delete( int n )
 484 {
 485     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 486
 487     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 488
 489     GList *child = g_list_nth( listbox->children, n );
 490
 491     if (!child)
 492     {
 493         wxFAIL_MSG(wxT("wrong index"));
 494         return;
 495     }
 496
 497     DisableEvents();
 498
 499     GList *list = g_list_append( (GList*) NULL, child->data );
 500     gtk_list_remove_items( listbox, list );
 501     g_list_free( list );
 502
 503     wxList::compatibility_iterator node = m_clientObjectList.Item( n );
 504     if (node)
 505     {
 506         wxClientData *cd = (wxClientData*)node->GetData();
 507         if (cd) delete cd;
 508         m_clientObjectList.Erase( node );
 509     }
 510
 511     node = m_clientDataList.Item( n );
 512     if (node)
 513         m_clientDataList.Erase( node );
 514
 515     EnableEvents();
 516
 517     InvalidateBestSize();
 518 }
 519
 520 void wxComboBox::SetString(int n, const wxString &text)
 521 {
 522     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 523
 524     GtkWidget *list = GTK_COMBO(m_widget)->list;
 525
 526     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 527     if (child)
 528     {
 529         GtkBin *bin = GTK_BIN( child->data );
 530         GtkLabel *label = GTK_LABEL( bin->child );
 531         gtk_label_set_text(label, wxGTK_CONV(text));
 532     }
 533     else
 534     {
 535         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 536     }
 537
 538     InvalidateBestSize();
 539 }
 540
 541 int wxComboBox::FindString( const wxString &item, bool bCase ) const
 542 {
 543     wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid combobox") );
 544
 545     GtkWidget *list = GTK_COMBO(m_widget)->list;
 546
 547     GList *child = GTK_LIST(list)->children;
 548     int count = 0;
 549     while (child)
 550     {
 551         GtkBin *bin = GTK_BIN( child->data );
 552         GtkLabel *label = GTK_LABEL( bin->child );
 553 #ifdef __WXGTK20__
 554         wxString str( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 555 #else
 556         wxString str( label->label );
 557 #endif
 558         if (item.IsSameAs( str , bCase ) )
 559             return count;
 560
 561         count++;
 562         child = child->next;
 563     }
 564
 565     return wxNOT_FOUND;
 566 }
 567
 568 int wxComboBox::GetSelection() const
 569 {
 570     // if the popup is currently opened, use the selection as it had been
 571     // before it dropped down
 572     return g_SelectionBeforePopup == wxID_NONE ? GetCurrentSelection()
 573                                                : g_SelectionBeforePopup;
 574 }
 575
 576 int wxComboBox::GetCurrentSelection() const
 577 {
 578     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 579
 580     GtkWidget *list = GTK_COMBO(m_widget)->list;
 581
 582     GList *selection = GTK_LIST(list)->selection;
 583     if (selection)
 584     {
 585         GList *child = GTK_LIST(list)->children;
 586         int count = 0;
 587         while (child)
 588         {
 589             if (child->data == selection->data) return count;
 590             count++;
 591             child = child->next;
 592         }
 593     }
 594
 595     return -1;
 596 }
 597
 598 wxString wxComboBox::GetString( int n ) const
 599 {
 600     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 601
 602     GtkWidget *list = GTK_COMBO(m_widget)->list;
 603
 604     wxString str;
 605     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 606     if (child)
 607     {
 608         GtkBin *bin = GTK_BIN( child->data );
 609         GtkLabel *label = GTK_LABEL( bin->child );
 610 #ifdef __WXGTK20__
 611         str = wxGTK_CONV_BACK( gtk_label_get_text(label) );
 612 #else
 613         str = wxString( label->label );
 614 #endif
 615     }
 616     else
 617     {
 618         wxFAIL_MSG( wxT("wxComboBox: wrong index") );
 619     }
 620
 621     return str;
 622 }
 623
 624 wxString wxComboBox::GetStringSelection() const
 625 {
 626     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid combobox") );
 627
 628     GtkWidget *list = GTK_COMBO(m_widget)->list;
 629
 630     GList *selection = GTK_LIST(list)->selection;
 631     if (selection)
 632     {
 633         GtkBin *bin = GTK_BIN( selection->data );
 634         GtkLabel *label = GTK_LABEL( bin->child );
 635 #ifdef __WXGTK20__
 636         wxString tmp( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );
 637 #else
 638         wxString tmp( label->label );
 639 #endif
 640         return tmp;
 641     }
 642
 643     wxFAIL_MSG( wxT("wxComboBox: no selection") );
 644
 645     return wxEmptyString;
 646 }
 647
 648 int wxComboBox::GetCount() const
 649 {
 650     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 651
 652     GtkWidget *list = GTK_COMBO(m_widget)->list;
 653
 654     GList *child = GTK_LIST(list)->children;
 655     int count = 0;
 656     while (child) { count++; child = child->next; }
 657     return count;
 658 }
 659
 660 void wxComboBox::SetSelection( int n )
 661 {
 662     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 663
 664     DisableEvents();
 665
 666     GtkWidget *list = GTK_COMBO(m_widget)->list;
 667     gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
 668     gtk_list_select_item( GTK_LIST(list), n );
 669     m_prevSelection = n;
 670
 671     EnableEvents();
 672 }
 673
 674 wxString wxComboBox::GetValue() const
 675 {
 676     GtkEntry *entry = GTK_ENTRY( GTK_COMBO(m_widget)->entry );
 677     wxString tmp( wxGTK_CONV_BACK( gtk_entry_get_text( entry ) ) );
 678
 679 #if 0
 680     for (int i = 0; i < wxStrlen(tmp.c_str()) +1; i++)
 681     {
 682         wxChar c = tmp[i];
 683         printf( "%d ", (int) (c) );
 684     }
 685     printf( "\n" );
 686 #endif
 687
 688     return tmp;
 689 }
 690
 691 void wxComboBox::SetValue( const wxString& value )
 692 {
 693     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 694
 695     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 696     wxString tmp;
 697     if (!value.IsNull()) tmp = value;
 698     gtk_entry_set_text( GTK_ENTRY(entry), wxGTK_CONV( tmp ) );
 699
 700     InvalidateBestSize();
 701 }
 702
 703 void wxComboBox::Copy()
 704 {
 705     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 706
 707     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 708     gtk_editable_copy_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 709 }
 710
 711 void wxComboBox::Cut()
 712 {
 713     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 714
 715     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 716     gtk_editable_cut_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 717 }
 718
 719 void wxComboBox::Paste()
 720 {
 721     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 722
 723     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 724     gtk_editable_paste_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG);
 725 }
 726
 727 void wxComboBox::Undo()
 728 {
 729     // TODO
 730 }
 731
 732 void wxComboBox::Redo()
 733 {
 734     // TODO
 735 }
 736
 737 void wxComboBox::SelectAll()
 738 {
 739     SetSelection(0, GetLastPosition());
 740 }
 741
 742 bool wxComboBox::CanUndo() const
 743 {
 744     // TODO
 745     return false;
 746 }
 747
 748 bool wxComboBox::CanRedo() const
 749 {
 750     // TODO
 751     return false;
 752 }
 753
 754 bool wxComboBox::HasSelection() const
 755 {
 756     long from, to;
 757     GetSelection(&from, &to);
 758     return from != to;
 759 }
 760
 761 bool wxComboBox::CanCopy() const
 762 {
 763     // Can copy if there's a selection
 764     return HasSelection();
 765 }
 766
 767 bool wxComboBox::CanCut() const
 768 {
 769     return CanCopy() && IsEditable();
 770 }
 771
 772 bool wxComboBox::CanPaste() const
 773 {
 774     // TODO: check for text on the clipboard
 775     return IsEditable() ;
 776 }
 777
 778 bool wxComboBox::IsEditable() const
 779 {
 780     return !HasFlag(wxCB_READONLY);
 781 }
 782
 783
 784 void wxComboBox::SetInsertionPoint( long pos )
 785 {
 786     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 787
 788     if ( pos == GetLastPosition() )
 789         pos = -1;
 790
 791     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 792     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
 793 }
 794
 795 long wxComboBox::GetInsertionPoint() const
 796 {
 797     return (long) GET_EDITABLE_POS( GTK_COMBO(m_widget)->entry );
 798 }
 799
 800 wxTextPos wxComboBox::GetLastPosition() const
 801 {
 802     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 803     int pos = GTK_ENTRY(entry)->text_length;
 804     return (long) pos-1;
 805 }
 806
 807 void wxComboBox::Replace( long from, long to, const wxString& value )
 808 {
 809     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 810
 811     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 812     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 813     if (value.IsNull()) return;
 814     gint pos = (gint)to;
 815
 816 #if wxUSE_UNICODE
 817     wxCharBuffer buffer = wxConvUTF8.cWX2MB( value );
 818     gtk_editable_insert_text( GTK_EDITABLE(entry), (const char*) buffer, strlen( (const char*) buffer ), &pos );
 819 #else
 820     gtk_editable_insert_text( GTK_EDITABLE(entry), value.c_str(), value.Length(), &pos );
 821 #endif
 822 }
 823
 824 void wxComboBox::SetSelection( long from, long to )
 825 {
 826     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 827     gtk_editable_select_region( GTK_EDITABLE(entry), (gint)from, (gint)to );
 828 }
 829
 830 void wxComboBox::GetSelection( long* from, long* to ) const
 831 {
 832     if (IsEditable())
 833     {
 834         GtkEditable *editable = GTK_EDITABLE(GTK_COMBO(m_widget)->entry);
 835 #ifdef __WXGTK20__
 836         gint start, end;
 837         gtk_editable_get_selection_bounds(editable, & start, & end);
 838         *from = start;
 839         *to = end;
 840 #else
 841         *from = (long) editable->selection_start_pos;
 842         *to = (long) editable->selection_end_pos;
 843 #endif
 844     }
 845 }
 846
 847 void wxComboBox::SetEditable( bool editable )
 848 {
 849     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 850     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 851 }
 852
 853 void wxComboBox::OnChar( wxKeyEvent &event )
 854 {
 855     if ( event.GetKeyCode() == WXK_RETURN )
 856     {
 857         // GTK automatically selects an item if its in the list
 858         wxCommandEvent eventEnter(wxEVT_COMMAND_TEXT_ENTER, GetId());
 859         eventEnter.SetString( GetValue() );
 860         eventEnter.SetInt( GetSelection() );
 861         eventEnter.SetEventObject( this );
 862
 863         if (!GetEventHandler()->ProcessEvent( eventEnter ))
 864         {
 865             // This will invoke the dialog default action, such
 866             // as the clicking the default button.
 867
 868             wxWindow *top_frame = m_parent;
 869             while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 870                 top_frame = top_frame->GetParent();
 871
 872             if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 873             {
 874                 GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 875
 876                 if (window->default_widget)
 877                         gtk_widget_activate (window->default_widget);
 878             }
 879         }
 880
 881         // Catch GTK event so that GTK doesn't open the drop
 882         // down list upon RETURN.
 883         return;
 884     }
 885
 886     event.Skip();
 887 }
 888
 889 void wxComboBox::DisableEvents()
 890 {
 891     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->list),
 892       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 893     gtk_signal_disconnect_by_func( GTK_OBJECT(GTK_COMBO(m_widget)->entry),
 894       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 895 }
 896
 897 void wxComboBox::EnableEvents()
 898 {
 899     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(m_widget)->list), "select-child",
 900       GTK_SIGNAL_FUNC(gtk_combo_select_child_callback), (gpointer)this );
 901     gtk_signal_connect_after( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
 902       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this );
 903 }
 904
 905 void wxComboBox::OnSize( wxSizeEvent &event )
 906 {
 907     // NB: In some situations (e.g. on non-first page of a wizard, if the
 908     //     size used is default size), GtkCombo widget is resized correctly,
 909     //     but it's look is not updated, it's rendered as if it was much wider.
 910     //     No other widgets are affected, so it looks like a bug in GTK+.
 911     //     Manually requesting resize calculation (as gtk_pizza_set_size does)
 912     //     fixes it.
 913     if (GTK_WIDGET_VISIBLE(m_widget))
 914         gtk_widget_queue_resize(m_widget);
 915
 916     event.Skip();
 917 }
 918
 919 void wxComboBox::DoApplyWidgetStyle(GtkRcStyle *style)
 920 {
 921 //    gtk_widget_modify_style( GTK_COMBO(m_widget)->button, syle );
 922
 923     gtk_widget_modify_style( GTK_COMBO(m_widget)->entry, style );
 924     gtk_widget_modify_style( GTK_COMBO(m_widget)->list, style );
 925
 926     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 927     GList *child = list->children;
 928     while (child)
 929     {
 930         gtk_widget_modify_style( GTK_WIDGET(child->data), style );
 931
 932         GtkBin *bin = GTK_BIN(child->data);
 933         gtk_widget_modify_style( bin->child, style );
 934
 935         child = child->next;
 936     }
 937 }
 938
 939 GtkWidget* wxComboBox::GetConnectWidget()
 940 {
 941     return GTK_COMBO(m_widget)->entry;
 942 }
 943
 944 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 945 {
 946     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 947              (window == GTK_COMBO(m_widget)->button->window ) );
 948 }
 949
 950 wxSize wxComboBox::DoGetBestSize() const
 951 {
 952     wxSize ret( wxControl::DoGetBestSize() );
 953
 954     // we know better our horizontal extent: it depends on the longest string
 955     // in the combobox
 956     if ( m_widget )
 957     {
 958         int width;
 959         size_t count = GetCount();
 960         for ( size_t n = 0; n < count; n++ )
 961         {
 962             GetTextExtent( GetString(n), &width, NULL, NULL, NULL );
 963             if ( width > ret.x )
 964                 ret.x = width;
 965         }
 966     }
 967
 968     // empty combobox should have some reasonable default size too
 969     if ( ret.x < 100 )
 970         ret.x = 100;
 971
 972     CacheBestSize(ret);
 973     return ret;
 974 }
 975
 976 // static
 977 wxVisualAttributes
 978 wxComboBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 979 {
 980     return GetDefaultAttributesFromGTKWidget(gtk_combo_new, true);
 981 }
 982
 983 // ----------------------------------------------------------------------------
 984 // standard event handling
 985 // ----------------------------------------------------------------------------
 986
 987 void wxComboBox::OnCut(wxCommandEvent& WXUNUSED(event))
 988 {
 989     Cut();
 990 }
 991
 992 void wxComboBox::OnCopy(wxCommandEvent& WXUNUSED(event))
 993 {
 994     Copy();
 995 }
 996
 997 void wxComboBox::OnPaste(wxCommandEvent& WXUNUSED(event))
 998 {
 999     Paste();
1000 }
1001
1002 void wxComboBox::OnUndo(wxCommandEvent& WXUNUSED(event))
1003 {
1004     Undo();
1005 }
1006
1007 void wxComboBox::OnRedo(wxCommandEvent& WXUNUSED(event))
1008 {
1009     Redo();
1010 }
1011
1012 void wxComboBox::OnDelete(wxCommandEvent& WXUNUSED(event))
1013 {
1014     long from, to;
1015     GetSelection(& from, & to);
1016     if (from != -1 && to != -1)
1017         Remove(from, to);
1018 }
1019
1020 void wxComboBox::OnSelectAll(wxCommandEvent& WXUNUSED(event))
1021 {
1022     SetSelection(-1, -1);
1023 }
1024
1025 void wxComboBox::OnUpdateCut(wxUpdateUIEvent& event)
1026 {
1027     event.Enable( CanCut() );
1028 }
1029
1030 void wxComboBox::OnUpdateCopy(wxUpdateUIEvent& event)
1031 {
1032     event.Enable( CanCopy() );
1033 }
1034
1035 void wxComboBox::OnUpdatePaste(wxUpdateUIEvent& event)
1036 {
1037     event.Enable( CanPaste() );
1038 }
1039
1040 void wxComboBox::OnUpdateUndo(wxUpdateUIEvent& event)
1041 {
1042     event.Enable( CanUndo() );
1043 }
1044
1045 void wxComboBox::OnUpdateRedo(wxUpdateUIEvent& event)
1046 {
1047     event.Enable( CanRedo() );
1048 }
1049
1050 void wxComboBox::OnUpdateDelete(wxUpdateUIEvent& event)
1051 {
1052     event.Enable(HasSelection() && IsEditable()) ;
1053 }
1054
1055 void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event)
1056 {
1057     event.Enable(GetLastPosition() > 0);
1058 }
1059
1060 #endif