src/gtk/combobox.cpp

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