src/gtk/listbox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        listbox.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10
  11 #ifdef __GNUG__
  12 #pragma implementation "listbox.h"
  13 #endif
  14
  15 #include "wx/listbox.h"
  16
  17 #if wxUSE_LISTBOX
  18
  19 #include "wx/dynarray.h"
  20 #include "wx/utils.h"
  21 #include "wx/intl.h"
  22 #include "wx/checklst.h"
  23 #include "wx/settings.h"
  24
  25 #if wxUSE_TOOLTIPS
  26 #include "wx/tooltip.h"
  27 #endif
  28
  29 #include <gdk/gdk.h>
  30 #include <gtk/gtk.h>
  31 #include <gdk/gdkkeysyms.h>
  32
  33 //-----------------------------------------------------------------------------
  34 // idle system
  35 //-----------------------------------------------------------------------------
  36
  37 extern void wxapp_install_idle_handler();
  38 extern bool g_isIdle;
  39
  40 //-----------------------------------------------------------------------------
  41 // private functions
  42 //-----------------------------------------------------------------------------
  43
  44 #if wxUSE_CHECKLISTBOX
  45
  46 // checklistboxes have "[±] " prepended to their lables, this macro removes it
  47 // (NB: 4 below is the length of wxCHECKLBOX_STRING above)
  48 //
  49 // the argument to it is a "const char *" pointer
  50 #define GET_REAL_LABEL(label) ((m_hasCheckBoxes)?(label)+4 : (label))
  51
  52 #else // !wxUSE_CHECKLISTBOX
  53
  54 #define GET_REAL_LABEL(label) (label)
  55
  56 #endif // wxUSE_CHECKLISTBOX
  57
  58 //-----------------------------------------------------------------------------
  59 // data
  60 //-----------------------------------------------------------------------------
  61
  62 extern bool       g_blockEventsOnDrag;
  63 extern bool       g_blockEventsOnScroll;
  64 extern wxCursor   g_globalCursor;
  65
  66 static bool       g_hasDoubleClicked = FALSE;
  67
  68 //-----------------------------------------------------------------------------
  69 // idle callback for SetFirstItem
  70 //-----------------------------------------------------------------------------
  71
  72 struct wxlistbox_idle_struct
  73 {
  74     wxListBox   *m_listbox;
  75     int          m_item;
  76     gint         m_tag;
  77 };
  78
  79 extern "C" gint wxlistbox_idle_callback( gpointer gdata )
  80 {
  81     wxlistbox_idle_struct* data = (wxlistbox_idle_struct*) gdata;
  82     gdk_threads_enter();
  83
  84     gtk_idle_remove( data->m_tag );
  85
  86     data->m_listbox->SetFirstItem( data->m_item );
  87
  88     delete data;
  89
  90     gdk_threads_leave();
  91
  92     return TRUE;
  93 }
  94
  95 //-----------------------------------------------------------------------------
  96 // "button_release_event"
  97 //-----------------------------------------------------------------------------
  98
  99 /* we would normally emit a wxEVT_COMMAND_LISTBOX_DOUBLECLICKED event once
 100    a GDK_2BUTTON_PRESS occurs, but this has the particular problem of the
 101    listbox keeping the focus until it receives a GDK_BUTTON_RELEASE event.
 102    this can lead to race conditions so that we emit the dclick event
 103    after the GDK_BUTTON_RELEASE event after the GDK_2BUTTON_PRESS event */
 104
 105 static gint
 106 gtk_listbox_button_release_callback( GtkWidget * WXUNUSED(widget),
 107                                      GdkEventButton * WXUNUSED(gdk_event),
 108                                      wxListBox *listbox )
 109 {
 110     if (g_isIdle) wxapp_install_idle_handler();
 111
 112     if (g_blockEventsOnDrag) return FALSE;
 113     if (g_blockEventsOnScroll) return FALSE;
 114
 115     if (!listbox->m_hasVMT) return FALSE;
 116
 117     if (!g_hasDoubleClicked) return FALSE;
 118
 119     wxCommandEvent event( wxEVT_COMMAND_LISTBOX_DOUBLECLICKED, listbox->GetId() );
 120     event.SetEventObject( listbox );
 121
 122     wxArrayInt aSelections;
 123     int n, count = listbox->GetSelections(aSelections);
 124     if ( count > 0 )
 125     {
 126         n = aSelections[0];
 127         if ( listbox->HasClientObjectData() )
 128             event.SetClientObject( listbox->GetClientObject(n) );
 129         else if ( listbox->HasClientUntypedData() )
 130             event.SetClientData( listbox->GetClientData(n) );
 131         event.SetString( listbox->GetString(n) );
 132     }
 133     else
 134     {
 135         n = -1;
 136     }
 137
 138     event.m_commandInt = n;
 139
 140     listbox->GetEventHandler()->ProcessEvent( event );
 141
 142     return FALSE;
 143 }
 144
 145 //-----------------------------------------------------------------------------
 146 // "button_press_event"
 147 //-----------------------------------------------------------------------------
 148
 149 static gint
 150 gtk_listbox_button_press_callback( GtkWidget *widget,
 151                                    GdkEventButton *gdk_event,
 152                                    wxListBox *listbox )
 153 {
 154     if (g_isIdle) wxapp_install_idle_handler();
 155
 156     if (g_blockEventsOnDrag) return FALSE;
 157     if (g_blockEventsOnScroll) return FALSE;
 158
 159     if (!listbox->m_hasVMT) return FALSE;
 160
 161     int sel = listbox->GtkGetIndex( widget );
 162
 163 #if wxUSE_CHECKLISTBOX
 164     if ((listbox->m_hasCheckBoxes) && (gdk_event->x < 15) && (gdk_event->type != GDK_2BUTTON_PRESS))
 165     {
 166         wxCheckListBox *clb = (wxCheckListBox *)listbox;
 167
 168         clb->Check( sel, !clb->IsChecked(sel) );
 169
 170         wxCommandEvent event( wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, listbox->GetId() );
 171         event.SetEventObject( listbox );
 172         event.SetInt( sel );
 173         listbox->GetEventHandler()->ProcessEvent( event );
 174     }
 175 #endif // wxUSE_CHECKLISTBOX
 176
 177     /* emit wxEVT_COMMAND_LISTBOX_DOUBLECLICKED later */
 178     g_hasDoubleClicked = (gdk_event->type == GDK_2BUTTON_PRESS);
 179
 180     return FALSE;
 181 }
 182
 183 //-----------------------------------------------------------------------------
 184 // "key_press_event"
 185 //-----------------------------------------------------------------------------
 186
 187 static gint
 188 gtk_listbox_key_press_callback( GtkWidget *widget, GdkEventKey *gdk_event, wxListBox *listbox )
 189 {
 190     if (g_isIdle)
 191         wxapp_install_idle_handler();
 192
 193     if (g_blockEventsOnDrag)
 194         return FALSE;
 195
 196     bool ret = FALSE;
 197
 198     if ((gdk_event->keyval == GDK_Tab) || (gdk_event->keyval == GDK_ISO_Left_Tab))
 199     {
 200         wxNavigationKeyEvent new_event;
 201         /* GDK reports GDK_ISO_Left_Tab for SHIFT-TAB */
 202         new_event.SetDirection( (gdk_event->keyval == GDK_Tab) );
 203         /* CTRL-TAB changes the (parent) window, i.e. switch notebook page */
 204         new_event.SetWindowChange( (gdk_event->state & GDK_CONTROL_MASK) );
 205         new_event.SetCurrentFocus( listbox );
 206         ret = listbox->GetEventHandler()->ProcessEvent( new_event );
 207     }
 208
 209     if ((gdk_event->keyval == GDK_Return) && (!ret))
 210     {
 211         // eat return in all modes
 212         ret = TRUE;
 213     }
 214
 215 #if wxUSE_CHECKLISTBOX
 216     if ((gdk_event->keyval == ' ') && (listbox->m_hasCheckBoxes) && (!ret))
 217     {
 218         int sel = listbox->GtkGetIndex( widget );
 219
 220         wxCheckListBox *clb = (wxCheckListBox *)listbox;
 221
 222         clb->Check( sel, !clb->IsChecked(sel) );
 223
 224         wxCommandEvent new_event( wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, listbox->GetId() );
 225         new_event.SetEventObject( listbox );
 226         new_event.SetInt( sel );
 227         ret = listbox->GetEventHandler()->ProcessEvent( new_event );
 228     }
 229 #endif // wxUSE_CHECKLISTBOX
 230
 231     if (ret)
 232     {
 233         gtk_signal_emit_stop_by_name( GTK_OBJECT(widget), "key_press_event" );
 234         return TRUE;
 235     }
 236
 237     return FALSE;
 238 }
 239
 240 //-----------------------------------------------------------------------------
 241 // "select" and "deselect"
 242 //-----------------------------------------------------------------------------
 243
 244 static void gtk_listitem_select_cb( GtkWidget *widget, wxListBox *listbox, bool is_selection );
 245
 246 static void gtk_listitem_select_callback( GtkWidget *widget, wxListBox *listbox )
 247 {
 248     gtk_listitem_select_cb( widget, listbox, TRUE );
 249 }
 250
 251 static void gtk_listitem_deselect_callback( GtkWidget *widget, wxListBox *listbox )
 252 {
 253     gtk_listitem_select_cb( widget, listbox, FALSE );
 254 }
 255
 256 static void gtk_listitem_select_cb( GtkWidget *widget, wxListBox *listbox, bool is_selection )
 257 {
 258     if (g_isIdle) wxapp_install_idle_handler();
 259
 260     if (!listbox->m_hasVMT) return;
 261     if (g_blockEventsOnDrag) return;
 262
 263     if (listbox->m_blockEvent) return;
 264
 265     wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, listbox->GetId() );
 266     event.SetEventObject( listbox );
 267
 268 //    MSW doesn't do that either
 269 //    event.SetExtraLong( (long) is_selection );
 270
 271
 272     if ((listbox->GetWindowStyleFlag() & wxLB_SINGLE) != 0)
 273     {
 274         int sel = listbox->GtkGetIndex( widget );
 275
 276         if (listbox->m_prevSelection != sel)
 277             gtk_list_unselect_item( listbox->m_list, listbox->m_prevSelection );
 278
 279         listbox->m_prevSelection = sel;
 280     }
 281
 282     wxArrayInt aSelections;
 283     int n, count = listbox->GetSelections(aSelections);
 284     if ( count > 0 )
 285     {
 286         n = aSelections[0];
 287         if ( listbox->HasClientObjectData() )
 288             event.SetClientObject( listbox->GetClientObject(n) );
 289         else if ( listbox->HasClientUntypedData() )
 290             event.SetClientData( listbox->GetClientData(n) );
 291         event.SetString( listbox->GetString(n) );
 292     }
 293     else
 294     {
 295         n = -1;
 296     }
 297
 298     event.m_commandInt = n;
 299
 300 //    No longer required with new code in wxLB_SINGLE
 301 //    listbox->GetEventHandler()->AddPendingEvent( event );
 302     listbox->GetEventHandler()->ProcessEvent( event );
 303 }
 304
 305 //-----------------------------------------------------------------------------
 306 // wxListBox
 307 //-----------------------------------------------------------------------------
 308
 309 IMPLEMENT_DYNAMIC_CLASS(wxListBox,wxControl)
 310
 311 // ----------------------------------------------------------------------------
 312 // construction
 313 // ----------------------------------------------------------------------------
 314
 315 wxListBox::wxListBox()
 316 {
 317     m_list = (GtkList *) NULL;
 318 #if wxUSE_CHECKLISTBOX
 319     m_hasCheckBoxes = FALSE;
 320 #endif // wxUSE_CHECKLISTBOX
 321 }
 322
 323 bool wxListBox::Create( wxWindow *parent, wxWindowID id,
 324                         const wxPoint &pos, const wxSize &size,
 325                         int n, const wxString choices[],
 326                         long style, const wxValidator& validator,
 327                         const wxString &name )
 328 {
 329     m_needParent = TRUE;
 330     m_acceptsFocus = TRUE;
 331     m_isListBox = TRUE;
 332     m_prevSelection = 0;  // or -1 ??
 333     m_blockEvent = FALSE;
 334
 335     if (!PreCreation( parent, pos, size ) ||
 336         !CreateBase( parent, id, pos, size, style, validator, name ))
 337     {
 338         wxFAIL_MSG( wxT("wxListBox creation failed") );
 339         return FALSE;
 340     }
 341
 342     m_widget = gtk_scrolled_window_new( (GtkAdjustment*) NULL, (GtkAdjustment*) NULL );
 343     if (style & wxLB_ALWAYS_SB)
 344     {
 345       gtk_scrolled_window_set_policy( GTK_SCROLLED_WINDOW(m_widget),
 346         GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS );
 347     }
 348     else
 349     {
 350       gtk_scrolled_window_set_policy( GTK_SCROLLED_WINDOW(m_widget),
 351         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC );
 352     }
 353
 354     m_list = GTK_LIST( gtk_list_new() );
 355
 356     GtkSelectionMode mode;
 357     if (style & wxLB_MULTIPLE)
 358     {
 359         mode = GTK_SELECTION_MULTIPLE;
 360     }
 361     else if (style & wxLB_EXTENDED)
 362     {
 363         mode = GTK_SELECTION_EXTENDED;
 364     }
 365     else
 366     {
 367         // if style was 0 set single mode
 368         m_windowStyle |= wxLB_SINGLE;
 369         mode = GTK_SELECTION_MULTIPLE;
 370     }
 371
 372     gtk_list_set_selection_mode( GTK_LIST(m_list), mode );
 373
 374     gtk_scrolled_window_add_with_viewport( GTK_SCROLLED_WINDOW(m_widget), GTK_WIDGET(m_list) );
 375
 376     /* make list scroll when moving the focus down using cursor keys */
 377     gtk_container_set_focus_vadjustment(
 378         GTK_CONTAINER(m_list),
 379         gtk_scrolled_window_get_vadjustment(
 380             GTK_SCROLLED_WINDOW(m_widget)));
 381
 382     gtk_widget_show( GTK_WIDGET(m_list) );
 383
 384     if ( style & wxLB_SORT )
 385     {
 386         // this will change DoAppend() behaviour
 387         m_strings = new wxSortedArrayString;
 388     }
 389     else
 390     {
 391         m_strings = (wxSortedArrayString *)NULL;
 392     }
 393
 394     for (int i = 0; i < n; i++)
 395     {
 396         // add one by one
 397         DoAppend(choices[i]);
 398     }
 399
 400     // call it after appending the strings to the listbox, otherwise it doesn't
 401     // work correctly
 402     SetBestSize( size );
 403
 404     m_parent->DoAddChild( this );
 405
 406     PostCreation();
 407
 408     SetBackgroundColour( wxSystemSettings::GetColour( wxSYS_COLOUR_LISTBOX ) );
 409     SetForegroundColour( parent->GetForegroundColour() );
 410     SetFont( parent->GetFont() );
 411
 412     Show( TRUE );
 413
 414     return TRUE;
 415 }
 416
 417 wxListBox::~wxListBox()
 418 {
 419     m_hasVMT = FALSE;
 420
 421     Clear();
 422
 423     if (m_strings)
 424       delete m_strings;
 425 }
 426
 427 void wxListBox::DoInsertItems(const wxArrayString& items, int pos)
 428 {
 429     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 430
 431     // VZ: notice that InsertItems knows nothing about sorting, so calling it
 432     //     from outside (and not from our own Append) is likely to break
 433     //     everything
 434
 435     // code elsewhere supposes we have as many items in m_clientList as items
 436     // in the listbox
 437     wxASSERT_MSG( m_clientList.GetCount() == (size_t)GetCount(),
 438                   wxT("bug in client data management") );
 439
 440     GList *children = m_list->children;
 441     int length = g_list_length(children);
 442
 443     wxCHECK_RET( pos <= length, wxT("invalid index in wxListBox::InsertItems") );
 444
 445     size_t nItems = items.GetCount();
 446     int index;
 447
 448     if (m_strings)
 449     {
 450         for (size_t n = 0; n < nItems; n++)
 451         {
 452             index = m_strings->Add( items[n] );
 453
 454             if (index != GetCount())
 455             {
 456                 GtkAddItem( items[n], index );
 457                 wxNode *node = m_clientList.Nth( index );
 458                 m_clientList.Insert( node, (wxObject*) NULL );
 459             }
 460             else
 461             {
 462                 GtkAddItem( items[n] );
 463                 m_clientList.Append( (wxObject*) NULL );
 464             }
 465         }
 466     }
 467     else
 468     {
 469         if (pos == length)
 470         {
 471             for ( size_t n = 0; n < nItems; n++ )
 472             {
 473                 GtkAddItem( items[n] );
 474
 475                 m_clientList.Append((wxObject *)NULL);
 476             }
 477         }
 478         else
 479         {
 480             wxNode *node = m_clientList.Nth( pos );
 481             for ( size_t n = 0; n < nItems; n++ )
 482             {
 483                 GtkAddItem( items[n], pos+n );
 484
 485                 m_clientList.Insert( node, (wxObject *)NULL );
 486             }
 487         }
 488     }
 489
 490     wxASSERT_MSG( m_clientList.GetCount() == (size_t)GetCount(),
 491                       wxT("bug in client data management") );
 492 }
 493
 494 int wxListBox::DoAppend( const wxString& item )
 495 {
 496     if (m_strings)
 497     {
 498         // need to determine the index
 499         int index = m_strings->Add( item );
 500
 501         // only if not at the end anyway
 502         if (index != GetCount())
 503         {
 504            GtkAddItem( item, index );
 505
 506            wxNode *node = m_clientList.Nth( index );
 507            m_clientList.Insert( node, (wxObject *)NULL );
 508
 509            return index;
 510         }
 511     }
 512
 513     GtkAddItem(item);
 514
 515     m_clientList.Append((wxObject *)NULL);
 516
 517     return GetCount() - 1;
 518 }
 519
 520 void wxListBox::GtkAddItem( const wxString &item, int pos )
 521 {
 522     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 523
 524     GtkWidget *list_item;
 525
 526     wxString label(item);
 527 #if wxUSE_CHECKLISTBOX
 528     if (m_hasCheckBoxes)
 529     {
 530         label.Prepend(wxCHECKLBOX_STRING);
 531     }
 532 #endif // wxUSE_CHECKLISTBOX
 533
 534     list_item = gtk_list_item_new_with_label( label.mbc_str() );
 535
 536     GList *gitem_list = g_list_alloc ();
 537     gitem_list->data = list_item;
 538
 539     if (pos == -1)
 540         gtk_list_append_items( GTK_LIST (m_list), gitem_list );
 541     else
 542         gtk_list_insert_items( GTK_LIST (m_list), gitem_list, pos );
 543
 544     gtk_signal_connect( GTK_OBJECT(list_item), "select",
 545       GTK_SIGNAL_FUNC(gtk_listitem_select_callback), (gpointer)this );
 546
 547     if (HasFlag(wxLB_MULTIPLE) || HasFlag(wxLB_EXTENDED))
 548         gtk_signal_connect( GTK_OBJECT(list_item), "deselect",
 549           GTK_SIGNAL_FUNC(gtk_listitem_deselect_callback), (gpointer)this );
 550
 551     gtk_signal_connect( GTK_OBJECT(list_item),
 552                         "button_press_event",
 553                         (GtkSignalFunc)gtk_listbox_button_press_callback,
 554                         (gpointer) this );
 555
 556     gtk_signal_connect_after( GTK_OBJECT(list_item),
 557                         "button_release_event",
 558                         (GtkSignalFunc)gtk_listbox_button_release_callback,
 559                         (gpointer) this );
 560
 561     gtk_signal_connect( GTK_OBJECT(list_item),
 562                            "key_press_event",
 563                            (GtkSignalFunc)gtk_listbox_key_press_callback,
 564                            (gpointer)this );
 565
 566     ConnectWidget( list_item );
 567
 568     gtk_widget_show( list_item );
 569
 570     if (GTK_WIDGET_REALIZED(m_widget))
 571     {
 572         gtk_widget_realize( list_item );
 573         gtk_widget_realize( GTK_BIN(list_item)->child );
 574
 575         // Apply current widget style to the new list_item
 576         if (m_widgetStyle)
 577         {
 578             gtk_widget_set_style( GTK_WIDGET( list_item ), m_widgetStyle );
 579             GtkBin *bin = GTK_BIN( list_item );
 580             GtkWidget *label = GTK_WIDGET( bin->child );
 581             gtk_widget_set_style( label, m_widgetStyle );
 582         }
 583
 584 #if wxUSE_TOOLTIPS
 585         if (m_tooltip) m_tooltip->Apply( this );
 586 #endif
 587     }
 588 }
 589
 590 void wxListBox::DoSetItems( const wxArrayString& items,
 591                             void **clientData)
 592 {
 593     Clear();
 594
 595     DoInsertItems(items, 0);
 596
 597     if ( clientData )
 598     {
 599         size_t count = items.GetCount();
 600         for ( size_t n = 0; n < count; n++ )
 601         {
 602             SetClientData(n, clientData[n]);
 603         }
 604     }
 605 }
 606
 607 // ----------------------------------------------------------------------------
 608 // client data
 609 // ----------------------------------------------------------------------------
 610
 611 void wxListBox::DoSetItemClientData( int n, void* clientData )
 612 {
 613     wxCHECK_RET( m_widget != NULL, wxT("invalid listbox control") );
 614
 615     wxNode *node = m_clientList.Nth( n );
 616     wxCHECK_RET( node, wxT("invalid index in wxListBox::DoSetItemClientData") );
 617
 618     node->SetData( (wxObject*) clientData );
 619 }
 620
 621 void* wxListBox::DoGetItemClientData( int n ) const
 622 {
 623     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid listbox control") );
 624
 625     wxNode *node = m_clientList.Nth( n );
 626     wxCHECK_MSG( node, NULL, wxT("invalid index in wxListBox::DoGetItemClientData") );
 627
 628     return node->Data();
 629 }
 630
 631 void wxListBox::DoSetItemClientObject( int n, wxClientData* clientData )
 632 {
 633     wxCHECK_RET( m_widget != NULL, wxT("invalid listbox control") );
 634
 635     wxNode *node = m_clientList.Nth( n );
 636     wxCHECK_RET( node, wxT("invalid index in wxListBox::DoSetItemClientObject") );
 637
 638     wxClientData *cd = (wxClientData*) node->Data();
 639     delete cd;
 640
 641     node->SetData( (wxObject*) clientData );
 642 }
 643
 644 wxClientData* wxListBox::DoGetItemClientObject( int n ) const
 645 {
 646     wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, wxT("invalid listbox control") );
 647
 648     wxNode *node = m_clientList.Nth( n );
 649     wxCHECK_MSG( node, (wxClientData *)NULL,
 650                  wxT("invalid index in wxListBox::DoGetItemClientObject") );
 651
 652     return (wxClientData*) node->Data();
 653 }
 654
 655 void wxListBox::Clear()
 656 {
 657     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 658
 659     gtk_list_clear_items( m_list, 0, GetCount() );
 660
 661     if ( GTK_LIST(m_list)->last_focus_child != NULL  )
 662     {
 663         // This should be NULL, I think.
 664         GTK_LIST(m_list)->last_focus_child = NULL;
 665     }
 666
 667     if ( HasClientObjectData() )
 668     {
 669         // destroy the data (due to Robert's idea of using wxList<wxObject>
 670         // and not wxList<wxClientData> we can't just say
 671         // m_clientList.DeleteContents(TRUE) - this would crash!
 672         wxNode *node = m_clientList.First();
 673         while ( node )
 674         {
 675             delete (wxClientData *)node->Data();
 676             node = node->Next();
 677         }
 678     }
 679     m_clientList.Clear();
 680
 681     if ( m_strings )
 682         m_strings->Clear();
 683 }
 684
 685 void wxListBox::Delete( int n )
 686 {
 687     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 688
 689     GList *child = g_list_nth( m_list->children, n );
 690
 691     wxCHECK_RET( child, wxT("wrong listbox index") );
 692
 693     GList *list = g_list_append( (GList*) NULL, child->data );
 694     gtk_list_remove_items( m_list, list );
 695     g_list_free( list );
 696
 697     wxNode *node = m_clientList.Nth( n );
 698     if ( node )
 699     {
 700         if ( m_clientDataItemsType == wxClientData_Object )
 701         {
 702             wxClientData *cd = (wxClientData*)node->Data();
 703             delete cd;
 704         }
 705
 706         m_clientList.DeleteNode( node );
 707     }
 708
 709     if ( m_strings )
 710         m_strings->Remove(n);
 711 }
 712
 713 // ----------------------------------------------------------------------------
 714 // string list access
 715 // ----------------------------------------------------------------------------
 716
 717 void wxListBox::SetString( int n, const wxString &string )
 718 {
 719     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 720
 721     GList *child = g_list_nth( m_list->children, n );
 722     if (child)
 723     {
 724         GtkBin *bin = GTK_BIN( child->data );
 725         GtkLabel *label = GTK_LABEL( bin->child );
 726
 727         wxString str;
 728 #if wxUSE_CHECKLISTBOX
 729         if (m_hasCheckBoxes)
 730             str += wxCHECKLBOX_STRING;
 731 #endif // wxUSE_CHECKLISTBOX
 732         str += string;
 733
 734         gtk_label_set( label, str.mbc_str() );
 735     }
 736     else
 737     {
 738         wxFAIL_MSG(wxT("wrong listbox index"));
 739     }
 740 }
 741
 742 wxString wxListBox::GetString( int n ) const
 743 {
 744     wxCHECK_MSG( m_list != NULL, wxT(""), wxT("invalid listbox") );
 745
 746     GList *child = g_list_nth( m_list->children, n );
 747     if (child)
 748     {
 749         GtkBin *bin = GTK_BIN( child->data );
 750         GtkLabel *label = GTK_LABEL( bin->child );
 751
 752         wxString str = wxString(GET_REAL_LABEL(label->label),*wxConvCurrent);
 753
 754         return str;
 755     }
 756
 757     wxFAIL_MSG(wxT("wrong listbox index"));
 758
 759     return wxT("");
 760 }
 761
 762 int wxListBox::GetCount() const
 763 {
 764     wxCHECK_MSG( m_list != NULL, -1, wxT("invalid listbox") );
 765
 766     GList *children = m_list->children;
 767     return g_list_length(children);
 768 }
 769
 770 int wxListBox::FindString( const wxString &item ) const
 771 {
 772     wxCHECK_MSG( m_list != NULL, -1, wxT("invalid listbox") );
 773
 774     GList *child = m_list->children;
 775     int count = 0;
 776     while (child)
 777     {
 778         GtkBin *bin = GTK_BIN( child->data );
 779         GtkLabel *label = GTK_LABEL( bin->child );
 780
 781         wxString str = wxString(GET_REAL_LABEL(label->label),*wxConvCurrent);
 782
 783         if (str == item)
 784             return count;
 785
 786         count++;
 787         child = child->next;
 788     }
 789
 790     // it's not an error if the string is not found -> no wxCHECK
 791
 792     return wxNOT_FOUND;
 793 }
 794
 795 // ----------------------------------------------------------------------------
 796 // selection
 797 // ----------------------------------------------------------------------------
 798
 799 int wxListBox::GetSelection() const
 800 {
 801     wxCHECK_MSG( m_list != NULL, -1, wxT("invalid listbox") );
 802
 803     GList *child = m_list->children;
 804     int count = 0;
 805     while (child)
 806     {
 807         if (GTK_WIDGET(child->data)->state == GTK_STATE_SELECTED) return count;
 808         count++;
 809         child = child->next;
 810     }
 811     return -1;
 812 }
 813
 814 int wxListBox::GetSelections( wxArrayInt& aSelections ) const
 815 {
 816     wxCHECK_MSG( m_list != NULL, -1, wxT("invalid listbox") );
 817
 818     // get the number of selected items first
 819     GList *child = m_list->children;
 820     int count = 0;
 821     for (child = m_list->children; child != NULL; child = child->next)
 822     {
 823         if (GTK_WIDGET(child->data)->state == GTK_STATE_SELECTED)
 824             count++;
 825     }
 826
 827     aSelections.Empty();
 828
 829     if (count > 0)
 830     {
 831         // now fill the list
 832         aSelections.Alloc(count); // optimization attempt
 833         int i = 0;
 834         for (child = m_list->children; child != NULL; child = child->next, i++)
 835         {
 836             if (GTK_WIDGET(child->data)->state == GTK_STATE_SELECTED)
 837                  aSelections.Add(i);
 838         }
 839     }
 840
 841     return count;
 842 }
 843
 844 bool wxListBox::IsSelected( int n ) const
 845 {
 846     wxCHECK_MSG( m_list != NULL, FALSE, wxT("invalid listbox") );
 847
 848     GList *target = g_list_nth( m_list->children, n );
 849
 850     wxCHECK_MSG( target, FALSE, wxT("invalid listbox index") );
 851
 852     return (GTK_WIDGET(target->data)->state == GTK_STATE_SELECTED) ;
 853 }
 854
 855 void wxListBox::SetSelection( int n, bool select )
 856 {
 857     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 858
 859     m_blockEvent = TRUE;
 860
 861     if (select)
 862     {
 863         if ((m_windowStyle & wxLB_SINGLE) != 0)
 864             gtk_list_unselect_item( m_list, m_prevSelection );
 865         gtk_list_select_item( m_list, n );
 866         m_prevSelection = n;
 867     }
 868     else
 869         gtk_list_unselect_item( m_list, n );
 870
 871     m_blockEvent = FALSE;
 872 }
 873
 874 void wxListBox::DoSetFirstItem( int n )
 875 {
 876     wxCHECK_RET( m_list, wxT("invalid listbox") );
 877
 878     if (gdk_pointer_is_grabbed () && GTK_WIDGET_HAS_GRAB (m_list))
 879         return;
 880
 881     // terribly efficient
 882     const gchar *vadjustment_key = "gtk-vadjustment";
 883     guint vadjustment_key_id = g_quark_from_static_string (vadjustment_key);
 884
 885     GtkAdjustment *adjustment =
 886        (GtkAdjustment*) gtk_object_get_data_by_id (GTK_OBJECT (m_list), vadjustment_key_id);
 887     wxCHECK_RET( adjustment, wxT("invalid listbox code") );
 888
 889     GList *target = g_list_nth( m_list->children, n );
 890     wxCHECK_RET( target, wxT("invalid listbox index") );
 891
 892     GtkWidget *item = GTK_WIDGET(target->data);
 893     wxCHECK_RET( item, wxT("invalid listbox code") );
 894
 895     if (item->allocation.y == -1)
 896     {
 897         wxlistbox_idle_struct* data = new wxlistbox_idle_struct;
 898         data->m_listbox = this;
 899         data->m_item = n;
 900         data->m_tag = gtk_idle_add_priority( 800, wxlistbox_idle_callback, (gpointer) data );
 901
 902         return;
 903     }
 904
 905     float y = item->allocation.y;
 906     if (y > adjustment->upper - adjustment->page_size)
 907         y = adjustment->upper - adjustment->page_size;
 908         gtk_adjustment_set_value( adjustment, y );
 909 }
 910
 911 // ----------------------------------------------------------------------------
 912 // helpers
 913 // ----------------------------------------------------------------------------
 914
 915 int wxListBox::GtkGetIndex( GtkWidget *item ) const
 916 {
 917     if (item)
 918     {
 919         GList *child = m_list->children;
 920         int count = 0;
 921         while (child)
 922         {
 923             if (GTK_WIDGET(child->data) == item) return count;
 924             count++;
 925             child = child->next;
 926         }
 927     }
 928     return -1;
 929 }
 930
 931 #if wxUSE_TOOLTIPS
 932 void wxListBox::ApplyToolTip( GtkTooltips *tips, const wxChar *tip )
 933 {
 934     GList *child = m_list->children;
 935     while (child)
 936     {
 937         gtk_tooltips_set_tip( tips, GTK_WIDGET( child->data ), wxConvCurrent->cWX2MB(tip), (gchar*) NULL );
 938         child = child->next;
 939     }
 940 }
 941 #endif // wxUSE_TOOLTIPS
 942
 943 GtkWidget *wxListBox::GetConnectWidget()
 944 {
 945     return GTK_WIDGET(m_list);
 946 }
 947
 948 bool wxListBox::IsOwnGtkWindow( GdkWindow *window )
 949 {
 950     if (GTK_WIDGET(m_list)->window == window) return TRUE;
 951
 952     GList *child = m_list->children;
 953     while (child)
 954     {
 955         GtkWidget *bin = GTK_WIDGET( child->data );
 956         if (bin->window == window) return TRUE;
 957         child = child->next;
 958     }
 959
 960     return FALSE;
 961 }
 962
 963 void wxListBox::ApplyWidgetStyle()
 964 {
 965     SetWidgetStyle();
 966
 967     if (m_backgroundColour.Ok())
 968     {
 969         GdkWindow *window = GTK_WIDGET(m_list)->window;
 970         if ( window )
 971         {
 972             m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
 973             gdk_window_set_background( window, m_backgroundColour.GetColor() );
 974             gdk_window_clear( window );
 975         }
 976     }
 977
 978     GList *child = m_list->children;
 979     while (child)
 980     {
 981         gtk_widget_set_style( GTK_WIDGET(child->data), m_widgetStyle );
 982
 983         GtkBin *bin = GTK_BIN( child->data );
 984         GtkWidget *label = GTK_WIDGET( bin->child );
 985         gtk_widget_set_style( label, m_widgetStyle );
 986
 987         child = child->next;
 988     }
 989 }
 990
 991 void wxListBox::OnInternalIdle()
 992 {
 993     wxCursor cursor = m_cursor;
 994     if (g_globalCursor.Ok()) cursor = g_globalCursor;
 995
 996     if (GTK_WIDGET(m_list)->window && cursor.Ok())
 997     {
 998         /* I now set the cursor the anew in every OnInternalIdle call
 999            as setting the cursor in a parent window also effects the
1000            windows above so that checking for the current cursor is
1001            not possible. */
1002
1003         gdk_window_set_cursor( GTK_WIDGET(m_list)->window, cursor.GetCursor() );
1004
1005         GList *child = m_list->children;
1006         while (child)
1007         {
1008             GtkBin *bin = GTK_BIN( child->data );
1009             GtkWidget *label = GTK_WIDGET( bin->child );
1010
1011             if (!label->window)
1012                 break;
1013             else
1014                 gdk_window_set_cursor( label->window, cursor.GetCursor() );
1015
1016             child = child->next;
1017         }
1018     }
1019
1020     UpdateWindowUI();
1021 }
1022
1023 wxSize wxListBox::DoGetBestSize() const
1024 {
1025     int lbWidth = 100;  // some defaults
1026     int lbHeight = 110;
1027     int wLine;
1028
1029     // Find the widest line
1030     for(int i = 0; i < GetCount(); i++) {
1031         wxString str(GetString(i));
1032         GetTextExtent(str, &wLine, NULL);
1033         lbWidth = wxMax(lbWidth, wLine);
1034     }
1035
1036     // Add room for the scrollbar
1037     lbWidth += wxSystemSettings::GetMetric(wxSYS_VSCROLL_X);
1038
1039     // And just a bit more
1040     int cx, cy;
1041     GetTextExtent("X", &cx, &cy);
1042     lbWidth += 3 * cx;
1043
1044     // don't make the listbox too tall (limit height to around 10 items) but don't
1045     // make it too small neither
1046     lbHeight = (cy+4) * wxMin(wxMax(GetCount(), 3), 10);
1047
1048     return wxSize(lbWidth, lbHeight);
1049 }
1050
1051 #endif