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 // conditional compilation
  42 //-------------------------------------------------------------------------
  43
  44 #if (GTK_MINOR_VERSION > 0)
  45     #define NEW_GTK_SCROLL_CODE
  46 #endif
  47
  48 //-----------------------------------------------------------------------------
  49 // private functions
  50 //-----------------------------------------------------------------------------
  51
  52 #if wxUSE_CHECKLISTBOX
  53
  54 // checklistboxes have "[±] " prepended to their lables, this macro removes it
  55 // (NB: 4 below is the length of wxCHECKLBOX_STRING above)
  56 //
  57 // the argument to it is a "const char *" pointer
  58 #define GET_REAL_LABEL(label) ((m_hasCheckBoxes)?(label)+4 : (label))
  59
  60 #else // !wxUSE_CHECKLISTBOX
  61
  62 #define GET_REAL_LABEL(label) (label)
  63
  64 #endif // wxUSE_CHECKLISTBOX
  65
  66 //-----------------------------------------------------------------------------
  67 // data
  68 //-----------------------------------------------------------------------------
  69
  70 extern bool       g_blockEventsOnDrag;
  71 extern bool       g_blockEventsOnScroll;
  72 extern wxCursor   g_globalCursor;
  73
  74 static bool       g_hasDoubleClicked = FALSE;
  75
  76 //-----------------------------------------------------------------------------
  77 // idle callback for SetFirstItem
  78 //-----------------------------------------------------------------------------
  79
  80 struct wxlistbox_idle_struct
  81 {
  82     wxListBox   *m_listbox;
  83     int          m_item;
  84     gint         m_tag;
  85 };
  86
  87 static gint wxlistbox_idle_callback( gpointer gdata )
  88 {
  89     wxlistbox_idle_struct* data = (wxlistbox_idle_struct*) gdata;
  90     gdk_threads_enter();
  91
  92     gtk_idle_remove( data->m_tag );
  93
  94     data->m_listbox->SetFirstItem( data->m_item );
  95
  96     delete data;
  97
  98     gdk_threads_leave();
  99
 100     return TRUE;
 101 }
 102
 103 //-----------------------------------------------------------------------------
 104 // "button_release_event"
 105 //-----------------------------------------------------------------------------
 106
 107 /* we would normally emit a wxEVT_COMMAND_LISTBOX_DOUBLECLICKED event once
 108    a GDK_2BUTTON_PRESS occurs, but this has the particular problem of the
 109    listbox keeping the focus until it receives a GDK_BUTTON_RELEASE event.
 110    this can lead to race conditions so that we emit the dclick event
 111    after the GDK_BUTTON_RELEASE event after the GDK_2BUTTON_PRESS event */
 112
 113 static gint
 114 gtk_listbox_button_release_callback( GtkWidget * WXUNUSED(widget),
 115                                      GdkEventButton * WXUNUSED(gdk_event),
 116                                      wxListBox *listbox )
 117 {
 118     if (g_isIdle) wxapp_install_idle_handler();
 119
 120     if (g_blockEventsOnDrag) return FALSE;
 121     if (g_blockEventsOnScroll) return FALSE;
 122
 123     if (!listbox->m_hasVMT) return FALSE;
 124
 125     if (!g_hasDoubleClicked) return FALSE;
 126
 127     wxCommandEvent event( wxEVT_COMMAND_LISTBOX_DOUBLECLICKED, listbox->GetId() );
 128     event.SetEventObject( listbox );
 129
 130     wxArrayInt aSelections;
 131     int n, count = listbox->GetSelections(aSelections);
 132     if ( count > 0 )
 133     {
 134         n = aSelections[0];
 135         if ( listbox->HasClientObjectData() )
 136             event.SetClientObject( listbox->GetClientObject(n) );
 137         else if ( listbox->HasClientUntypedData() )
 138             event.SetClientData( listbox->GetClientData(n) );
 139         event.SetString( listbox->GetString(n) );
 140     }
 141     else
 142     {
 143         n = -1;
 144     }
 145
 146     event.m_commandInt = n;
 147
 148     listbox->GetEventHandler()->ProcessEvent( event );
 149
 150     return FALSE;
 151 }
 152
 153 //-----------------------------------------------------------------------------
 154 // "button_press_event"
 155 //-----------------------------------------------------------------------------
 156
 157 static gint
 158 gtk_listbox_button_press_callback( GtkWidget *widget,
 159                                    GdkEventButton *gdk_event,
 160                                    wxListBox *listbox )
 161 {
 162     if (g_isIdle) wxapp_install_idle_handler();
 163
 164     if (g_blockEventsOnDrag) return FALSE;
 165     if (g_blockEventsOnScroll) return FALSE;
 166
 167     if (!listbox->m_hasVMT) return FALSE;
 168
 169     int sel = listbox->GtkGetIndex( widget );
 170
 171 #if wxUSE_CHECKLISTBOX
 172     if ((listbox->m_hasCheckBoxes) && (gdk_event->x < 15) && (gdk_event->type != GDK_2BUTTON_PRESS))
 173     {
 174         wxCheckListBox *clb = (wxCheckListBox *)listbox;
 175
 176         clb->Check( sel, !clb->IsChecked(sel) );
 177
 178         wxCommandEvent event( wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, listbox->GetId() );
 179         event.SetEventObject( listbox );
 180         event.SetInt( sel );
 181         listbox->GetEventHandler()->ProcessEvent( event );
 182     }
 183 #endif // wxUSE_CHECKLISTBOX
 184
 185     /* emit wxEVT_COMMAND_LISTBOX_DOUBLECLICKED later */
 186     g_hasDoubleClicked = (gdk_event->type == GDK_2BUTTON_PRESS);
 187
 188     return FALSE;
 189 }
 190
 191 //-----------------------------------------------------------------------------
 192 // "key_press_event"
 193 //-----------------------------------------------------------------------------
 194
 195 static gint
 196 gtk_listbox_key_press_callback( GtkWidget *widget, GdkEventKey *gdk_event, wxListBox *listbox )
 197 {
 198     if (g_isIdle)
 199         wxapp_install_idle_handler();
 200
 201     if (g_blockEventsOnDrag)
 202         return FALSE;
 203
 204     bool ret = FALSE;
 205
 206     if ((gdk_event->keyval == GDK_Tab) || (gdk_event->keyval == GDK_ISO_Left_Tab))
 207     {
 208         wxNavigationKeyEvent new_event;
 209         /* GDK reports GDK_ISO_Left_Tab for SHIFT-TAB */
 210         new_event.SetDirection( (gdk_event->keyval == GDK_Tab) );
 211         /* CTRL-TAB changes the (parent) window, i.e. switch notebook page */
 212         new_event.SetWindowChange( (gdk_event->state & GDK_CONTROL_MASK) );
 213         new_event.SetCurrentFocus( listbox );
 214         ret = listbox->GetEventHandler()->ProcessEvent( new_event );
 215     }
 216
 217     if ((gdk_event->keyval == GDK_Return) && (!ret))
 218     {
 219         // eat return in all modes
 220         ret = TRUE;
 221     }
 222
 223 #if wxUSE_CHECKLISTBOX
 224     if ((gdk_event->keyval == ' ') && (listbox->m_hasCheckBoxes) && (!ret))
 225     {
 226         int sel = listbox->GtkGetIndex( widget );
 227
 228         wxCheckListBox *clb = (wxCheckListBox *)listbox;
 229
 230         clb->Check( sel, !clb->IsChecked(sel) );
 231
 232         wxCommandEvent new_event( wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, listbox->GetId() );
 233         new_event.SetEventObject( listbox );
 234         new_event.SetInt( sel );
 235         ret = listbox->GetEventHandler()->ProcessEvent( new_event );
 236     }
 237 #endif // wxUSE_CHECKLISTBOX
 238
 239     if (ret)
 240     {
 241         gtk_signal_emit_stop_by_name( GTK_OBJECT(widget), "key_press_event" );
 242         return TRUE;
 243     }
 244
 245     return FALSE;
 246 }
 247
 248 //-----------------------------------------------------------------------------
 249 // "select" and "deselect"
 250 //-----------------------------------------------------------------------------
 251
 252 static void gtk_listitem_select_cb( GtkWidget *widget, wxListBox *listbox, bool is_selection );
 253
 254 static void gtk_listitem_select_callback( GtkWidget *widget, wxListBox *listbox )
 255 {
 256     gtk_listitem_select_cb( widget, listbox, TRUE );
 257 }
 258
 259 static void gtk_listitem_deselect_callback( GtkWidget *widget, wxListBox *listbox )
 260 {
 261     gtk_listitem_select_cb( widget, listbox, FALSE );
 262 }
 263
 264 static void gtk_listitem_select_cb( GtkWidget *widget, wxListBox *listbox, bool is_selection )
 265 {
 266     if (g_isIdle) wxapp_install_idle_handler();
 267
 268     if (!listbox->m_hasVMT) return;
 269     if (g_blockEventsOnDrag) return;
 270
 271     if (listbox->m_blockEvent) return;
 272
 273     wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, listbox->GetId() );
 274     event.SetEventObject( listbox );
 275
 276 //    MSW doesn't do that either
 277 //    event.SetExtraLong( (long) is_selection );
 278
 279
 280     if ((listbox->GetWindowStyleFlag() & wxLB_SINGLE) != 0)
 281     {
 282         int sel = listbox->GtkGetIndex( widget );
 283
 284         if (listbox->m_prevSelection != sel)
 285             gtk_list_unselect_item( listbox->m_list, listbox->m_prevSelection );
 286
 287         listbox->m_prevSelection = sel;
 288     }
 289
 290     wxArrayInt aSelections;
 291     int n, count = listbox->GetSelections(aSelections);
 292     if ( count > 0 )
 293     {
 294         n = aSelections[0];
 295         if ( listbox->HasClientObjectData() )
 296             event.SetClientObject( listbox->GetClientObject(n) );
 297         else if ( listbox->HasClientUntypedData() )
 298             event.SetClientData( listbox->GetClientData(n) );
 299         event.SetString( listbox->GetString(n) );
 300     }
 301     else
 302     {
 303         n = -1;
 304     }
 305
 306     event.m_commandInt = n;
 307
 308 //    No longer required with new code in wxLB_SINGLE
 309 //    listbox->GetEventHandler()->AddPendingEvent( event );
 310     listbox->GetEventHandler()->ProcessEvent( event );
 311 }
 312
 313 //-----------------------------------------------------------------------------
 314 // wxListBox
 315 //-----------------------------------------------------------------------------
 316
 317 IMPLEMENT_DYNAMIC_CLASS(wxListBox,wxControl)
 318
 319 // ----------------------------------------------------------------------------
 320 // construction
 321 // ----------------------------------------------------------------------------
 322
 323 wxListBox::wxListBox()
 324 {
 325     m_list = (GtkList *) NULL;
 326 #if wxUSE_CHECKLISTBOX
 327     m_hasCheckBoxes = FALSE;
 328 #endif // wxUSE_CHECKLISTBOX
 329 }
 330
 331 bool wxListBox::Create( wxWindow *parent, wxWindowID id,
 332                         const wxPoint &pos, const wxSize &size,
 333                         int n, const wxString choices[],
 334                         long style, const wxValidator& validator,
 335                         const wxString &name )
 336 {
 337     m_needParent = TRUE;
 338     m_acceptsFocus = TRUE;
 339     m_isListBox = TRUE;
 340     m_prevSelection = 0;  // or -1 ??
 341     m_blockEvent = FALSE;
 342
 343     if (!PreCreation( parent, pos, size ) ||
 344         !CreateBase( parent, id, pos, size, style, validator, name ))
 345     {
 346         wxFAIL_MSG( wxT("wxListBox creation failed") );
 347         return FALSE;
 348     }
 349
 350     m_widget = gtk_scrolled_window_new( (GtkAdjustment*) NULL, (GtkAdjustment*) NULL );
 351     if (style & wxLB_ALWAYS_SB)
 352     {
 353       gtk_scrolled_window_set_policy( GTK_SCROLLED_WINDOW(m_widget),
 354         GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS );
 355     }
 356     else
 357     {
 358       gtk_scrolled_window_set_policy( GTK_SCROLLED_WINDOW(m_widget),
 359         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC );
 360     }
 361
 362     m_list = GTK_LIST( gtk_list_new() );
 363
 364     GtkSelectionMode mode;
 365     if (style & wxLB_MULTIPLE)
 366     {
 367         mode = GTK_SELECTION_MULTIPLE;
 368     }
 369     else if (style & wxLB_EXTENDED)
 370     {
 371         mode = GTK_SELECTION_EXTENDED;
 372     }
 373     else
 374     {
 375         // if style was 0 set single mode
 376         m_windowStyle |= wxLB_SINGLE;
 377         mode = GTK_SELECTION_MULTIPLE;
 378     }
 379
 380     gtk_list_set_selection_mode( GTK_LIST(m_list), mode );
 381
 382 #ifdef NEW_GTK_SCROLL_CODE
 383     gtk_scrolled_window_add_with_viewport( GTK_SCROLLED_WINDOW(m_widget), GTK_WIDGET(m_list) );
 384 #else
 385     gtk_container_add( GTK_CONTAINER(m_widget), GTK_WIDGET(m_list) );
 386 #endif
 387
 388     /* make list scroll when moving the focus down using cursor keys */
 389     gtk_container_set_focus_vadjustment(
 390         GTK_CONTAINER(m_list),
 391         gtk_scrolled_window_get_vadjustment(
 392             GTK_SCROLLED_WINDOW(m_widget)));
 393
 394     gtk_widget_show( GTK_WIDGET(m_list) );
 395
 396     if ( style & wxLB_SORT )
 397     {
 398         // this will change DoAppend() behaviour
 399         m_strings = new wxSortedArrayString;
 400     }
 401     else
 402     {
 403         m_strings = (wxSortedArrayString *)NULL;
 404     }
 405
 406     for (int i = 0; i < n; i++)
 407     {
 408         // add one by one
 409         DoAppend(choices[i]);
 410     }
 411
 412     // call it after appending the strings to the listbox, otherwise it doesn't
 413     // work correctly
 414     SetBestSize( size );
 415
 416     m_parent->DoAddChild( this );
 417
 418     PostCreation();
 419
 420     SetBackgroundColour( wxSystemSettings::GetSystemColour( wxSYS_COLOUR_LISTBOX ) );
 421     SetForegroundColour( parent->GetForegroundColour() );
 422     SetFont( parent->GetFont() );
 423
 424     Show( TRUE );
 425
 426     return TRUE;
 427 }
 428
 429 wxListBox::~wxListBox()
 430 {
 431     m_hasVMT = FALSE;
 432
 433     Clear();
 434
 435     if (m_strings)
 436       delete m_strings;
 437 }
 438
 439 void wxListBox::DoInsertItems(const wxArrayString& items, int pos)
 440 {
 441     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 442
 443     // VZ: notice that InsertItems knows nothing about sorting, so calling it
 444     //     from outside (and not from our own Append) is likely to break
 445     //     everything
 446
 447     // code elsewhere supposes we have as many items in m_clientList as items
 448     // in the listbox
 449     wxASSERT_MSG( m_clientList.GetCount() == (size_t)GetCount(),
 450                   wxT("bug in client data management") );
 451
 452     GList *children = m_list->children;
 453     int length = g_list_length(children);
 454
 455     wxCHECK_RET( pos <= length, wxT("invalid index in wxListBox::InsertItems") );
 456
 457     size_t nItems = items.GetCount();
 458     int index;
 459
 460     if (m_strings)
 461     {
 462         for (size_t n = 0; n < nItems; n++)
 463         {
 464             index = m_strings->Add( items[n] );
 465
 466             if (index != GetCount())
 467             {
 468                 GtkAddItem( items[n], index );
 469                 wxNode *node = m_clientList.Nth( index );
 470                 m_clientList.Insert( node, (wxObject*) NULL );
 471             }
 472             else
 473             {
 474                 GtkAddItem( items[n] );
 475                 m_clientList.Append( (wxObject*) NULL );
 476             }
 477         }
 478     }
 479     else
 480     {
 481         if (pos == length)
 482         {
 483             for ( size_t n = 0; n < nItems; n++ )
 484             {
 485                 GtkAddItem( items[n] );
 486
 487                 m_clientList.Append((wxObject *)NULL);
 488             }
 489         }
 490         else
 491         {
 492             wxNode *node = m_clientList.Nth( pos );
 493             for ( size_t n = 0; n < nItems; n++ )
 494             {
 495                 GtkAddItem( items[n], pos+n );
 496
 497                 m_clientList.Insert( node, (wxObject *)NULL );
 498             }
 499         }
 500     }
 501
 502     wxASSERT_MSG( m_clientList.GetCount() == (size_t)GetCount(),
 503                       wxT("bug in client data management") );
 504 }
 505
 506 int wxListBox::DoAppend( const wxString& item )
 507 {
 508     if (m_strings)
 509     {
 510         // need to determine the index
 511         int index = m_strings->Add( item );
 512
 513         // only if not at the end anyway
 514         if (index != GetCount())
 515         {
 516            GtkAddItem( item, index );
 517
 518            wxNode *node = m_clientList.Nth( index );
 519            m_clientList.Insert( node, (wxObject *)NULL );
 520
 521            return index;
 522         }
 523     }
 524
 525     GtkAddItem(item);
 526
 527     m_clientList.Append((wxObject *)NULL);
 528
 529     return GetCount() - 1;
 530 }
 531
 532 void wxListBox::GtkAddItem( const wxString &item, int pos )
 533 {
 534     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 535
 536     GtkWidget *list_item;
 537
 538     wxString label(item);
 539 #if wxUSE_CHECKLISTBOX
 540     if (m_hasCheckBoxes)
 541     {
 542         label.Prepend(wxCHECKLBOX_STRING);
 543     }
 544 #endif // wxUSE_CHECKLISTBOX
 545
 546     list_item = gtk_list_item_new_with_label( label.mbc_str() );
 547
 548     GList *gitem_list = g_list_alloc ();
 549     gitem_list->data = list_item;
 550
 551     if (pos == -1)
 552         gtk_list_append_items( GTK_LIST (m_list), gitem_list );
 553     else
 554         gtk_list_insert_items( GTK_LIST (m_list), gitem_list, pos );
 555
 556     gtk_signal_connect( GTK_OBJECT(list_item), "select",
 557       GTK_SIGNAL_FUNC(gtk_listitem_select_callback), (gpointer)this );
 558
 559     if (HasFlag(wxLB_MULTIPLE) || HasFlag(wxLB_EXTENDED))
 560         gtk_signal_connect( GTK_OBJECT(list_item), "deselect",
 561           GTK_SIGNAL_FUNC(gtk_listitem_deselect_callback), (gpointer)this );
 562
 563     gtk_signal_connect( GTK_OBJECT(list_item),
 564                         "button_press_event",
 565                         (GtkSignalFunc)gtk_listbox_button_press_callback,
 566                         (gpointer) this );
 567
 568     gtk_signal_connect_after( GTK_OBJECT(list_item),
 569                         "button_release_event",
 570                         (GtkSignalFunc)gtk_listbox_button_release_callback,
 571                         (gpointer) this );
 572
 573     gtk_signal_connect( GTK_OBJECT(list_item),
 574                            "key_press_event",
 575                            (GtkSignalFunc)gtk_listbox_key_press_callback,
 576                            (gpointer)this );
 577
 578     ConnectWidget( list_item );
 579
 580     gtk_widget_show( list_item );
 581
 582     if (GTK_WIDGET_REALIZED(m_widget))
 583     {
 584         gtk_widget_realize( list_item );
 585         gtk_widget_realize( GTK_BIN(list_item)->child );
 586
 587         // Apply current widget style to the new list_item
 588         if (m_widgetStyle)
 589         {
 590             gtk_widget_set_style( GTK_WIDGET( list_item ), m_widgetStyle );
 591             GtkBin *bin = GTK_BIN( list_item );
 592             GtkWidget *label = GTK_WIDGET( bin->child );
 593             gtk_widget_set_style( label, m_widgetStyle );
 594         }
 595
 596 #if wxUSE_TOOLTIPS
 597         if (m_tooltip) m_tooltip->Apply( this );
 598 #endif
 599     }
 600 }
 601
 602 void wxListBox::DoSetItems( const wxArrayString& items,
 603                             void **clientData)
 604 {
 605     Clear();
 606
 607     DoInsertItems(items, 0);
 608
 609     if ( clientData )
 610     {
 611         size_t count = items.GetCount();
 612         for ( size_t n = 0; n < count; n++ )
 613         {
 614             SetClientData(n, clientData[n]);
 615         }
 616     }
 617 }
 618
 619 // ----------------------------------------------------------------------------
 620 // client data
 621 // ----------------------------------------------------------------------------
 622
 623 void wxListBox::DoSetItemClientData( int n, void* clientData )
 624 {
 625     wxCHECK_RET( m_widget != NULL, wxT("invalid listbox control") );
 626
 627     wxNode *node = m_clientList.Nth( n );
 628     wxCHECK_RET( node, wxT("invalid index in wxListBox::DoSetItemClientData") );
 629
 630     node->SetData( (wxObject*) clientData );
 631 }
 632
 633 void* wxListBox::DoGetItemClientData( int n ) const
 634 {
 635     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid listbox control") );
 636
 637     wxNode *node = m_clientList.Nth( n );
 638     wxCHECK_MSG( node, NULL, wxT("invalid index in wxListBox::DoGetItemClientData") );
 639
 640     return node->Data();
 641 }
 642
 643 void wxListBox::DoSetItemClientObject( int n, wxClientData* clientData )
 644 {
 645     wxCHECK_RET( m_widget != NULL, wxT("invalid listbox control") );
 646
 647     wxNode *node = m_clientList.Nth( n );
 648     wxCHECK_RET( node, wxT("invalid index in wxListBox::DoSetItemClientObject") );
 649
 650     wxClientData *cd = (wxClientData*) node->Data();
 651     delete cd;
 652
 653     node->SetData( (wxObject*) clientData );
 654 }
 655
 656 wxClientData* wxListBox::DoGetItemClientObject( int n ) const
 657 {
 658     wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, wxT("invalid listbox control") );
 659
 660     wxNode *node = m_clientList.Nth( n );
 661     wxCHECK_MSG( node, (wxClientData *)NULL,
 662                  wxT("invalid index in wxListBox::DoGetItemClientObject") );
 663
 664     return (wxClientData*) node->Data();
 665 }
 666
 667 void wxListBox::Clear()
 668 {
 669     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 670
 671     gtk_list_clear_items( m_list, 0, GetCount() );
 672
 673     if ( GTK_LIST(m_list)->last_focus_child != NULL  )
 674     {
 675         // This should be NULL, I think.
 676         GTK_LIST(m_list)->last_focus_child = NULL;
 677     }
 678
 679     if ( HasClientObjectData() )
 680     {
 681         // destroy the data (due to Robert's idea of using wxList<wxObject>
 682         // and not wxList<wxClientData> we can't just say
 683         // m_clientList.DeleteContents(TRUE) - this would crash!
 684         wxNode *node = m_clientList.First();
 685         while ( node )
 686         {
 687             delete (wxClientData *)node->Data();
 688             node = node->Next();
 689         }
 690     }
 691     m_clientList.Clear();
 692
 693     if ( m_strings )
 694         m_strings->Clear();
 695 }
 696
 697 void wxListBox::Delete( int n )
 698 {
 699     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 700
 701     GList *child = g_list_nth( m_list->children, n );
 702
 703     wxCHECK_RET( child, wxT("wrong listbox index") );
 704
 705     GList *list = g_list_append( (GList*) NULL, child->data );
 706     gtk_list_remove_items( m_list, list );
 707     g_list_free( list );
 708
 709     wxNode *node = m_clientList.Nth( n );
 710     if ( node )
 711     {
 712         if ( m_clientDataItemsType == wxClientData_Object )
 713         {
 714             wxClientData *cd = (wxClientData*)node->Data();
 715             delete cd;
 716         }
 717
 718         m_clientList.DeleteNode( node );
 719     }
 720
 721     if ( m_strings )
 722         m_strings->Remove(n);
 723 }
 724
 725 // ----------------------------------------------------------------------------
 726 // string list access
 727 // ----------------------------------------------------------------------------
 728
 729 void wxListBox::SetString( int n, const wxString &string )
 730 {
 731     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 732
 733     GList *child = g_list_nth( m_list->children, n );
 734     if (child)
 735     {
 736         GtkBin *bin = GTK_BIN( child->data );
 737         GtkLabel *label = GTK_LABEL( bin->child );
 738
 739         wxString str;
 740 #if wxUSE_CHECKLISTBOX
 741         if (m_hasCheckBoxes)
 742             str += wxCHECKLBOX_STRING;
 743 #endif // wxUSE_CHECKLISTBOX
 744         str += string;
 745
 746         gtk_label_set( label, str.mbc_str() );
 747     }
 748     else
 749     {
 750         wxFAIL_MSG(wxT("wrong listbox index"));
 751     }
 752 }
 753
 754 wxString wxListBox::GetString( int n ) const
 755 {
 756     wxCHECK_MSG( m_list != NULL, wxT(""), wxT("invalid listbox") );
 757
 758     GList *child = g_list_nth( m_list->children, n );
 759     if (child)
 760     {
 761         GtkBin *bin = GTK_BIN( child->data );
 762         GtkLabel *label = GTK_LABEL( bin->child );
 763
 764         wxString str = wxString(GET_REAL_LABEL(label->label),*wxConvCurrent);
 765
 766         return str;
 767     }
 768
 769     wxFAIL_MSG(wxT("wrong listbox index"));
 770
 771     return wxT("");
 772 }
 773
 774 int wxListBox::GetCount() const
 775 {
 776     wxCHECK_MSG( m_list != NULL, -1, wxT("invalid listbox") );
 777
 778     GList *children = m_list->children;
 779     return g_list_length(children);
 780 }
 781
 782 int wxListBox::FindString( const wxString &item ) const
 783 {
 784     wxCHECK_MSG( m_list != NULL, -1, wxT("invalid listbox") );
 785
 786     GList *child = m_list->children;
 787     int count = 0;
 788     while (child)
 789     {
 790         GtkBin *bin = GTK_BIN( child->data );
 791         GtkLabel *label = GTK_LABEL( bin->child );
 792
 793         wxString str = wxString(GET_REAL_LABEL(label->label),*wxConvCurrent);
 794
 795         if (str == item)
 796             return count;
 797
 798         count++;
 799         child = child->next;
 800     }
 801
 802     // it's not an error if the string is not found -> no wxCHECK
 803
 804     return wxNOT_FOUND;
 805 }
 806
 807 // ----------------------------------------------------------------------------
 808 // selection
 809 // ----------------------------------------------------------------------------
 810
 811 int wxListBox::GetSelection() const
 812 {
 813     wxCHECK_MSG( m_list != NULL, -1, wxT("invalid listbox") );
 814
 815     GList *child = m_list->children;
 816     int count = 0;
 817     while (child)
 818     {
 819         if (GTK_WIDGET(child->data)->state == GTK_STATE_SELECTED) return count;
 820         count++;
 821         child = child->next;
 822     }
 823     return -1;
 824 }
 825
 826 int wxListBox::GetSelections( wxArrayInt& aSelections ) const
 827 {
 828     wxCHECK_MSG( m_list != NULL, -1, wxT("invalid listbox") );
 829
 830     // get the number of selected items first
 831     GList *child = m_list->children;
 832     int count = 0;
 833     for (child = m_list->children; child != NULL; child = child->next)
 834     {
 835         if (GTK_WIDGET(child->data)->state == GTK_STATE_SELECTED)
 836             count++;
 837     }
 838
 839     aSelections.Empty();
 840
 841     if (count > 0)
 842     {
 843         // now fill the list
 844         aSelections.Alloc(count); // optimization attempt
 845         int i = 0;
 846         for (child = m_list->children; child != NULL; child = child->next, i++)
 847         {
 848             if (GTK_WIDGET(child->data)->state == GTK_STATE_SELECTED)
 849                  aSelections.Add(i);
 850         }
 851     }
 852
 853     return count;
 854 }
 855
 856 bool wxListBox::IsSelected( int n ) const
 857 {
 858     wxCHECK_MSG( m_list != NULL, FALSE, wxT("invalid listbox") );
 859
 860     GList *target = g_list_nth( m_list->children, n );
 861
 862     wxCHECK_MSG( target, FALSE, wxT("invalid listbox index") );
 863
 864     return (GTK_WIDGET(target->data)->state == GTK_STATE_SELECTED) ;
 865 }
 866
 867 void wxListBox::SetSelection( int n, bool select )
 868 {
 869     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 870
 871     m_blockEvent = TRUE;
 872
 873     if (select)
 874     {
 875         if ((m_windowStyle & wxLB_SINGLE) != 0)
 876             gtk_list_unselect_item( m_list, m_prevSelection );
 877         gtk_list_select_item( m_list, n );
 878         m_prevSelection = n;
 879     }
 880     else
 881         gtk_list_unselect_item( m_list, n );
 882
 883     m_blockEvent = FALSE;
 884 }
 885
 886 void wxListBox::DoSetFirstItem( int n )
 887 {
 888     wxCHECK_RET( m_list, wxT("invalid listbox") );
 889
 890     if (gdk_pointer_is_grabbed () && GTK_WIDGET_HAS_GRAB (m_list))
 891         return;
 892
 893     // terribly efficient
 894     const gchar *vadjustment_key = "gtk-vadjustment";
 895     guint vadjustment_key_id = g_quark_from_static_string (vadjustment_key);
 896
 897     GtkAdjustment *adjustment =
 898        (GtkAdjustment*) gtk_object_get_data_by_id (GTK_OBJECT (m_list), vadjustment_key_id);
 899     wxCHECK_RET( adjustment, wxT("invalid listbox code") );
 900
 901     GList *target = g_list_nth( m_list->children, n );
 902     wxCHECK_RET( target, wxT("invalid listbox index") );
 903
 904     GtkWidget *item = GTK_WIDGET(target->data);
 905     wxCHECK_RET( item, wxT("invalid listbox code") );
 906
 907     if (item->allocation.y == -1)
 908     {
 909         wxlistbox_idle_struct* data = new wxlistbox_idle_struct;
 910         data->m_listbox = this;
 911         data->m_item = n;
 912         data->m_tag = gtk_idle_add_priority( 800, wxlistbox_idle_callback, (gpointer) data );
 913
 914         return;
 915     }
 916
 917     float y = item->allocation.y;
 918     if (y > adjustment->upper - adjustment->page_size)
 919         y = adjustment->upper - adjustment->page_size;
 920         gtk_adjustment_set_value( adjustment, y );
 921 }
 922
 923 // ----------------------------------------------------------------------------
 924 // helpers
 925 // ----------------------------------------------------------------------------
 926
 927 int wxListBox::GtkGetIndex( GtkWidget *item ) const
 928 {
 929     if (item)
 930     {
 931         GList *child = m_list->children;
 932         int count = 0;
 933         while (child)
 934         {
 935             if (GTK_WIDGET(child->data) == item) return count;
 936             count++;
 937             child = child->next;
 938         }
 939     }
 940     return -1;
 941 }
 942
 943 #if wxUSE_TOOLTIPS
 944 void wxListBox::ApplyToolTip( GtkTooltips *tips, const wxChar *tip )
 945 {
 946     GList *child = m_list->children;
 947     while (child)
 948     {
 949         gtk_tooltips_set_tip( tips, GTK_WIDGET( child->data ), wxConvCurrent->cWX2MB(tip), (gchar*) NULL );
 950         child = child->next;
 951     }
 952 }
 953 #endif // wxUSE_TOOLTIPS
 954
 955 GtkWidget *wxListBox::GetConnectWidget()
 956 {
 957     return GTK_WIDGET(m_list);
 958 }
 959
 960 bool wxListBox::IsOwnGtkWindow( GdkWindow *window )
 961 {
 962     if (GTK_WIDGET(m_list)->window == window) return TRUE;
 963
 964     GList *child = m_list->children;
 965     while (child)
 966     {
 967         GtkWidget *bin = GTK_WIDGET( child->data );
 968         if (bin->window == window) return TRUE;
 969         child = child->next;
 970     }
 971
 972     return FALSE;
 973 }
 974
 975 void wxListBox::ApplyWidgetStyle()
 976 {
 977     SetWidgetStyle();
 978
 979     if (m_backgroundColour.Ok())
 980     {
 981         GdkWindow *window = GTK_WIDGET(m_list)->window;
 982         if ( window )
 983         {
 984             m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
 985             gdk_window_set_background( window, m_backgroundColour.GetColor() );
 986             gdk_window_clear( window );
 987         }
 988     }
 989
 990     GList *child = m_list->children;
 991     while (child)
 992     {
 993         gtk_widget_set_style( GTK_WIDGET(child->data), m_widgetStyle );
 994
 995         GtkBin *bin = GTK_BIN( child->data );
 996         GtkWidget *label = GTK_WIDGET( bin->child );
 997         gtk_widget_set_style( label, m_widgetStyle );
 998
 999         child = child->next;
1000     }
1001 }
1002
1003 void wxListBox::OnInternalIdle()
1004 {
1005     wxCursor cursor = m_cursor;
1006     if (g_globalCursor.Ok()) cursor = g_globalCursor;
1007
1008     if (GTK_WIDGET(m_list)->window && cursor.Ok())
1009     {
1010         /* I now set the cursor the anew in every OnInternalIdle call
1011            as setting the cursor in a parent window also effects the
1012            windows above so that checking for the current cursor is
1013            not possible. */
1014
1015         gdk_window_set_cursor( GTK_WIDGET(m_list)->window, cursor.GetCursor() );
1016
1017         GList *child = m_list->children;
1018         while (child)
1019         {
1020             GtkBin *bin = GTK_BIN( child->data );
1021             GtkWidget *label = GTK_WIDGET( bin->child );
1022
1023             if (!label->window)
1024                 break;
1025             else
1026                 gdk_window_set_cursor( label->window, cursor.GetCursor() );
1027
1028             child = child->next;
1029         }
1030     }
1031
1032     UpdateWindowUI();
1033 }
1034
1035 wxSize wxListBox::DoGetBestSize() const
1036 {
1037     int lbWidth = 100;  // some defaults
1038     int lbHeight = 110;
1039     int wLine;
1040
1041     // Find the widest line
1042     for(int i = 0; i < GetCount(); i++) {
1043         wxString str(GetString(i));
1044         GetTextExtent(str, &wLine, NULL);
1045         lbWidth = wxMax(lbWidth, wLine);
1046     }
1047
1048     // Add room for the scrollbar
1049     lbWidth += wxSystemSettings::GetSystemMetric(wxSYS_VSCROLL_X);
1050
1051     // And just a bit more
1052     int cx, cy;
1053     GetTextExtent("X", &cx, &cy);
1054     lbWidth += 3 * cx;
1055
1056     // don't make the listbox too tall (limit height to around 10 items) but don't
1057     // make it too small neither
1058     lbHeight = (cy+4) * wxMin(wxMax(GetCount(), 3), 10);
1059
1060     return wxSize(lbWidth, lbHeight);
1061 }
1062
1063 #endif