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 #include "wx/gtk/private.h"
  25
  26 #if wxUSE_TOOLTIPS
  27 #include "wx/tooltip.h"
  28 #endif
  29
  30 #include <gdk/gdk.h>
  31 #include <gtk/gtk.h>
  32 #include <gdk/gdkkeysyms.h>
  33
  34 //-----------------------------------------------------------------------------
  35 // idle system
  36 //-----------------------------------------------------------------------------
  37
  38 extern void wxapp_install_idle_handler();
  39 extern bool g_isIdle;
  40
  41 //-----------------------------------------------------------------------------
  42 // data
  43 //-----------------------------------------------------------------------------
  44
  45 extern bool           g_blockEventsOnDrag;
  46 extern bool           g_blockEventsOnScroll;
  47 extern wxCursor       g_globalCursor;
  48 extern wxWindowGTK   *g_delayedFocus;
  49
  50 static bool       g_hasDoubleClicked = FALSE;
  51
  52 //-----------------------------------------------------------------------------
  53 // idle callback for SetFirstItem
  54 //-----------------------------------------------------------------------------
  55
  56 struct wxlistbox_idle_struct
  57 {
  58     wxListBox   *m_listbox;
  59     int          m_item;
  60     gint         m_tag;
  61 };
  62
  63 extern "C" gint wxlistbox_idle_callback( gpointer gdata )
  64 {
  65     wxlistbox_idle_struct* data = (wxlistbox_idle_struct*) gdata;
  66     gdk_threads_enter();
  67
  68     gtk_idle_remove( data->m_tag );
  69
  70     // check that the items haven't been deleted from the listbox since we had
  71     // installed this callback
  72     wxListBox *lbox = data->m_listbox;
  73     if ( data->m_item < lbox->GetCount() )
  74     {
  75         lbox->SetFirstItem( data->m_item );
  76     }
  77
  78     delete data;
  79
  80     gdk_threads_leave();
  81
  82     return TRUE;
  83 }
  84
  85 //-----------------------------------------------------------------------------
  86 // "button_release_event"
  87 //-----------------------------------------------------------------------------
  88
  89 /* we would normally emit a wxEVT_COMMAND_LISTBOX_DOUBLECLICKED event once
  90    a GDK_2BUTTON_PRESS occurs, but this has the particular problem of the
  91    listbox keeping the focus until it receives a GDK_BUTTON_RELEASE event.
  92    this can lead to race conditions so that we emit the dclick event
  93    after the GDK_BUTTON_RELEASE event after the GDK_2BUTTON_PRESS event */
  94
  95 static gint
  96 gtk_listbox_button_release_callback( GtkWidget * WXUNUSED(widget),
  97                                      GdkEventButton * WXUNUSED(gdk_event),
  98                                      wxListBox *listbox )
  99 {
 100     if (g_isIdle) wxapp_install_idle_handler();
 101
 102     if (g_blockEventsOnDrag) return FALSE;
 103     if (g_blockEventsOnScroll) return FALSE;
 104
 105     if (!listbox->m_hasVMT) return FALSE;
 106
 107     if (!g_hasDoubleClicked) return FALSE;
 108
 109     wxCommandEvent event( wxEVT_COMMAND_LISTBOX_DOUBLECLICKED, listbox->GetId() );
 110     event.SetEventObject( listbox );
 111
 112     wxArrayInt aSelections;
 113     int n, count = listbox->GetSelections(aSelections);
 114     if ( count > 0 )
 115     {
 116         n = aSelections[0];
 117         if ( listbox->HasClientObjectData() )
 118             event.SetClientObject( listbox->GetClientObject(n) );
 119         else if ( listbox->HasClientUntypedData() )
 120             event.SetClientData( listbox->GetClientData(n) );
 121         event.SetString( listbox->GetString(n) );
 122     }
 123     else
 124     {
 125         n = -1;
 126     }
 127
 128     event.m_commandInt = n;
 129
 130     listbox->GetEventHandler()->ProcessEvent( event );
 131
 132     return FALSE;
 133 }
 134
 135 //-----------------------------------------------------------------------------
 136 // "button_press_event"
 137 //-----------------------------------------------------------------------------
 138
 139 static gint
 140 gtk_listbox_button_press_callback( GtkWidget *widget,
 141                                    GdkEventButton *gdk_event,
 142                                    wxListBox *listbox )
 143 {
 144     if (g_isIdle) wxapp_install_idle_handler();
 145
 146     if (g_blockEventsOnDrag) return FALSE;
 147     if (g_blockEventsOnScroll) return FALSE;
 148
 149     if (!listbox->m_hasVMT) return FALSE;
 150
 151     int sel = listbox->GtkGetIndex( widget );
 152
 153 #if wxUSE_CHECKLISTBOX
 154     if ((listbox->m_hasCheckBoxes) && (gdk_event->x < 15) && (gdk_event->type != GDK_2BUTTON_PRESS))
 155     {
 156         wxCheckListBox *clb = (wxCheckListBox *)listbox;
 157
 158         clb->Check( sel, !clb->IsChecked(sel) );
 159
 160         wxCommandEvent event( wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, listbox->GetId() );
 161         event.SetEventObject( listbox );
 162         event.SetInt( sel );
 163         listbox->GetEventHandler()->ProcessEvent( event );
 164     }
 165 #endif // wxUSE_CHECKLISTBOX
 166
 167     /* emit wxEVT_COMMAND_LISTBOX_DOUBLECLICKED later */
 168     g_hasDoubleClicked = (gdk_event->type == GDK_2BUTTON_PRESS);
 169
 170     return FALSE;
 171 }
 172
 173 //-----------------------------------------------------------------------------
 174 // "key_press_event"
 175 //-----------------------------------------------------------------------------
 176
 177 static gint
 178 gtk_listbox_key_press_callback( GtkWidget *widget, GdkEventKey *gdk_event, wxListBox *listbox )
 179 {
 180     if (g_isIdle)
 181         wxapp_install_idle_handler();
 182
 183     if (g_blockEventsOnDrag)
 184         return FALSE;
 185
 186     bool ret = FALSE;
 187
 188     if ((gdk_event->keyval == GDK_Tab) || (gdk_event->keyval == GDK_ISO_Left_Tab))
 189     {
 190         wxNavigationKeyEvent new_event;
 191         /* GDK reports GDK_ISO_Left_Tab for SHIFT-TAB */
 192         new_event.SetDirection( (gdk_event->keyval == GDK_Tab) );
 193         /* CTRL-TAB changes the (parent) window, i.e. switch notebook page */
 194         new_event.SetWindowChange( (gdk_event->state & GDK_CONTROL_MASK) );
 195         new_event.SetCurrentFocus( listbox );
 196         ret = listbox->GetEventHandler()->ProcessEvent( new_event );
 197     }
 198
 199     if ((gdk_event->keyval == GDK_Return) && (!ret))
 200     {
 201         // eat return in all modes
 202         ret = TRUE;
 203     }
 204
 205 #if wxUSE_CHECKLISTBOX
 206     if ((gdk_event->keyval == ' ') && (listbox->m_hasCheckBoxes) && (!ret))
 207     {
 208         int sel = listbox->GtkGetIndex( widget );
 209
 210         wxCheckListBox *clb = (wxCheckListBox *)listbox;
 211
 212         clb->Check( sel, !clb->IsChecked(sel) );
 213
 214         wxCommandEvent new_event( wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, listbox->GetId() );
 215         new_event.SetEventObject( listbox );
 216         new_event.SetInt( sel );
 217         ret = listbox->GetEventHandler()->ProcessEvent( new_event );
 218     }
 219 #endif // wxUSE_CHECKLISTBOX
 220
 221     if (ret)
 222     {
 223         gtk_signal_emit_stop_by_name( GTK_OBJECT(widget), "key_press_event" );
 224         return TRUE;
 225     }
 226
 227     return FALSE;
 228 }
 229
 230 //-----------------------------------------------------------------------------
 231 // "select" and "deselect"
 232 //-----------------------------------------------------------------------------
 233
 234 static void gtk_listitem_select_cb( GtkWidget *widget, wxListBox *listbox, bool is_selection );
 235
 236 static void gtk_listitem_select_callback( GtkWidget *widget, wxListBox *listbox )
 237 {
 238     gtk_listitem_select_cb( widget, listbox, TRUE );
 239 }
 240
 241 static void gtk_listitem_deselect_callback( GtkWidget *widget, wxListBox *listbox )
 242 {
 243     gtk_listitem_select_cb( widget, listbox, FALSE );
 244 }
 245
 246 static void gtk_listitem_select_cb( GtkWidget *widget, wxListBox *listbox, bool is_selection )
 247 {
 248     if (g_isIdle) wxapp_install_idle_handler();
 249
 250     if (!listbox->m_hasVMT) return;
 251     if (g_blockEventsOnDrag) return;
 252
 253     if (listbox->m_blockEvent) return;
 254
 255     wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, listbox->GetId() );
 256     event.SetEventObject( listbox );
 257
 258 //    MSW doesn't do that either
 259 //    event.SetExtraLong( (long) is_selection );
 260
 261
 262     if ((listbox->GetWindowStyleFlag() & wxLB_SINGLE) != 0)
 263     {
 264         int sel = listbox->GtkGetIndex( widget );
 265
 266         if (listbox->m_prevSelection != sel)
 267             gtk_list_unselect_item( listbox->m_list, listbox->m_prevSelection );
 268
 269         listbox->m_prevSelection = sel;
 270     }
 271
 272     wxArrayInt aSelections;
 273     int n, count = listbox->GetSelections(aSelections);
 274     if ( count > 0 )
 275     {
 276         n = aSelections[0];
 277         if ( listbox->HasClientObjectData() )
 278             event.SetClientObject( listbox->GetClientObject(n) );
 279         else if ( listbox->HasClientUntypedData() )
 280             event.SetClientData( listbox->GetClientData(n) );
 281         event.SetString( listbox->GetString(n) );
 282     }
 283     else
 284     {
 285         n = -1;
 286     }
 287
 288     event.m_commandInt = n;
 289
 290 //    No longer required with new code in wxLB_SINGLE
 291 //    listbox->GetEventHandler()->AddPendingEvent( event );
 292     listbox->GetEventHandler()->ProcessEvent( event );
 293 }
 294
 295 //-----------------------------------------------------------------------------
 296 // wxListBox
 297 //-----------------------------------------------------------------------------
 298
 299 IMPLEMENT_DYNAMIC_CLASS(wxListBox,wxControl)
 300
 301 // ----------------------------------------------------------------------------
 302 // construction
 303 // ----------------------------------------------------------------------------
 304
 305 wxListBox::wxListBox()
 306 {
 307     m_list = (GtkList *) NULL;
 308 #if wxUSE_CHECKLISTBOX
 309     m_hasCheckBoxes = FALSE;
 310 #endif // wxUSE_CHECKLISTBOX
 311 }
 312
 313 bool wxListBox::Create( wxWindow *parent, wxWindowID id,
 314                         const wxPoint &pos, const wxSize &size,
 315                         int n, const wxString choices[],
 316                         long style, const wxValidator& validator,
 317                         const wxString &name )
 318 {
 319     m_needParent = TRUE;
 320     m_acceptsFocus = TRUE;
 321     m_prevSelection = 0;  // or -1 ??
 322     m_blockEvent = FALSE;
 323
 324     if (!PreCreation( parent, pos, size ) ||
 325         !CreateBase( parent, id, pos, size, style, validator, name ))
 326     {
 327         wxFAIL_MSG( wxT("wxListBox creation failed") );
 328         return FALSE;
 329     }
 330
 331     m_widget = gtk_scrolled_window_new( (GtkAdjustment*) NULL, (GtkAdjustment*) NULL );
 332     if (style & wxLB_ALWAYS_SB)
 333     {
 334       gtk_scrolled_window_set_policy( GTK_SCROLLED_WINDOW(m_widget),
 335         GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS );
 336     }
 337     else
 338     {
 339       gtk_scrolled_window_set_policy( GTK_SCROLLED_WINDOW(m_widget),
 340         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC );
 341     }
 342
 343     m_list = GTK_LIST( gtk_list_new() );
 344
 345     GtkSelectionMode mode;
 346     if (style & wxLB_MULTIPLE)
 347     {
 348         mode = GTK_SELECTION_MULTIPLE;
 349     }
 350     else if (style & wxLB_EXTENDED)
 351     {
 352         mode = GTK_SELECTION_EXTENDED;
 353     }
 354     else
 355     {
 356         // if style was 0 set single mode
 357         m_windowStyle |= wxLB_SINGLE;
 358         mode = GTK_SELECTION_MULTIPLE;
 359     }
 360
 361     gtk_list_set_selection_mode( GTK_LIST(m_list), mode );
 362
 363     gtk_scrolled_window_add_with_viewport( GTK_SCROLLED_WINDOW(m_widget), GTK_WIDGET(m_list) );
 364
 365     /* make list scroll when moving the focus down using cursor keys */
 366     gtk_container_set_focus_vadjustment(
 367         GTK_CONTAINER(m_list),
 368         gtk_scrolled_window_get_vadjustment(
 369             GTK_SCROLLED_WINDOW(m_widget)));
 370
 371     gtk_widget_show( GTK_WIDGET(m_list) );
 372
 373     if ( style & wxLB_SORT )
 374     {
 375         // this will change DoAppend() behaviour
 376         m_strings = new wxSortedArrayString;
 377     }
 378     else
 379     {
 380         m_strings = (wxSortedArrayString *)NULL;
 381     }
 382
 383     for (int i = 0; i < n; i++)
 384     {
 385         // add one by one
 386         DoAppend(choices[i]);
 387     }
 388
 389     // call it after appending the strings to the listbox, otherwise it doesn't
 390     // work correctly
 391     SetBestSize( size );
 392
 393     m_parent->DoAddChild( this );
 394
 395     PostCreation();
 396
 397     SetBackgroundColour( wxSystemSettings::GetColour( wxSYS_COLOUR_LISTBOX ) );
 398     SetForegroundColour( parent->GetForegroundColour() );
 399     SetFont( parent->GetFont() );
 400
 401     Show( TRUE );
 402
 403     return TRUE;
 404 }
 405
 406 wxListBox::~wxListBox()
 407 {
 408     m_hasVMT = FALSE;
 409
 410     Clear();
 411
 412     if (m_strings)
 413       delete m_strings;
 414 }
 415
 416 // ----------------------------------------------------------------------------
 417 // adding items
 418 // ----------------------------------------------------------------------------
 419
 420 void wxListBox::DoInsertItems(const wxArrayString& items, int pos)
 421 {
 422     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 423
 424     // VZ: notice that InsertItems knows nothing about sorting, so calling it
 425     //     from outside (and not from our own Append) is likely to break
 426     //     everything
 427
 428     // code elsewhere supposes we have as many items in m_clientList as items
 429     // in the listbox
 430     wxASSERT_MSG( m_clientList.GetCount() == (size_t)GetCount(),
 431                   wxT("bug in client data management") );
 432
 433     GList *children = m_list->children;
 434     int length = g_list_length(children);
 435
 436     wxCHECK_RET( pos <= length, wxT("invalid index in wxListBox::InsertItems") );
 437
 438     size_t nItems = items.GetCount();
 439     int index;
 440
 441     if (m_strings)
 442     {
 443         for (size_t n = 0; n < nItems; n++)
 444         {
 445             index = m_strings->Add( items[n] );
 446
 447             if (index != GetCount())
 448             {
 449                 GtkAddItem( items[n], index );
 450                 wxNode *node = m_clientList.Item( index );
 451                 m_clientList.Insert( node, (wxObject*) NULL );
 452             }
 453             else
 454             {
 455                 GtkAddItem( items[n] );
 456                 m_clientList.Append( (wxObject*) NULL );
 457             }
 458         }
 459     }
 460     else
 461     {
 462         if (pos == length)
 463         {
 464             for ( size_t n = 0; n < nItems; n++ )
 465             {
 466                 GtkAddItem( items[n] );
 467
 468                 m_clientList.Append((wxObject *)NULL);
 469             }
 470         }
 471         else
 472         {
 473             wxNode *node = m_clientList.Item( pos );
 474             for ( size_t n = 0; n < nItems; n++ )
 475             {
 476                 GtkAddItem( items[n], pos+n );
 477
 478                 m_clientList.Insert( node, (wxObject *)NULL );
 479             }
 480         }
 481     }
 482
 483     wxASSERT_MSG( m_clientList.GetCount() == (size_t)GetCount(),
 484                       wxT("bug in client data management") );
 485 }
 486
 487 int wxListBox::DoAppend( const wxString& item )
 488 {
 489     if (m_strings)
 490     {
 491         // need to determine the index
 492         int index = m_strings->Add( item );
 493
 494         // only if not at the end anyway
 495         if (index != GetCount())
 496         {
 497            GtkAddItem( item, index );
 498
 499            wxNode *node = m_clientList.Item( index );
 500            m_clientList.Insert( node, (wxObject *)NULL );
 501
 502            return index;
 503         }
 504     }
 505
 506     GtkAddItem(item);
 507
 508     m_clientList.Append((wxObject *)NULL);
 509
 510     return GetCount() - 1;
 511 }
 512
 513 void wxListBox::GtkAddItem( const wxString &item, int pos )
 514 {
 515     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 516
 517     GtkWidget *list_item;
 518
 519     wxString label(item);
 520 #if wxUSE_CHECKLISTBOX
 521     if (m_hasCheckBoxes)
 522     {
 523         label.Prepend(wxCHECKLBOX_STRING);
 524     }
 525 #endif // wxUSE_CHECKLISTBOX
 526
 527     list_item = gtk_list_item_new_with_label( wxGTK_CONV( label ) );
 528
 529     GList *gitem_list = g_list_alloc ();
 530     gitem_list->data = list_item;
 531
 532     if (pos == -1)
 533         gtk_list_append_items( GTK_LIST (m_list), gitem_list );
 534     else
 535         gtk_list_insert_items( GTK_LIST (m_list), gitem_list, pos );
 536
 537     gtk_signal_connect( GTK_OBJECT(list_item), "select",
 538       GTK_SIGNAL_FUNC(gtk_listitem_select_callback), (gpointer)this );
 539
 540     if (HasFlag(wxLB_MULTIPLE) || HasFlag(wxLB_EXTENDED))
 541         gtk_signal_connect( GTK_OBJECT(list_item), "deselect",
 542           GTK_SIGNAL_FUNC(gtk_listitem_deselect_callback), (gpointer)this );
 543
 544     gtk_signal_connect( GTK_OBJECT(list_item),
 545                         "button_press_event",
 546                         (GtkSignalFunc)gtk_listbox_button_press_callback,
 547                         (gpointer) this );
 548
 549     gtk_signal_connect_after( GTK_OBJECT(list_item),
 550                         "button_release_event",
 551                         (GtkSignalFunc)gtk_listbox_button_release_callback,
 552                         (gpointer) this );
 553
 554     gtk_signal_connect( GTK_OBJECT(list_item),
 555                            "key_press_event",
 556                            (GtkSignalFunc)gtk_listbox_key_press_callback,
 557                            (gpointer)this );
 558
 559     ConnectWidget( list_item );
 560
 561     gtk_widget_show( list_item );
 562
 563     if (GTK_WIDGET_REALIZED(m_widget))
 564     {
 565         gtk_widget_realize( list_item );
 566         gtk_widget_realize( GTK_BIN(list_item)->child );
 567
 568         // Apply current widget style to the new list_item
 569         if (m_widgetStyle)
 570         {
 571             gtk_widget_set_style( GTK_WIDGET( list_item ), m_widgetStyle );
 572             GtkBin *bin = GTK_BIN( list_item );
 573             GtkWidget *label = GTK_WIDGET( bin->child );
 574             gtk_widget_set_style( label, m_widgetStyle );
 575         }
 576
 577 #if wxUSE_TOOLTIPS
 578         if (m_tooltip) m_tooltip->Apply( this );
 579 #endif
 580     }
 581 }
 582
 583 void wxListBox::DoSetItems( const wxArrayString& items,
 584                             void **clientData)
 585 {
 586     Clear();
 587
 588     DoInsertItems(items, 0);
 589
 590     if ( clientData )
 591     {
 592         size_t count = items.GetCount();
 593         for ( size_t n = 0; n < count; n++ )
 594         {
 595             SetClientData(n, clientData[n]);
 596         }
 597     }
 598 }
 599
 600 // ----------------------------------------------------------------------------
 601 // deleting items
 602 // ----------------------------------------------------------------------------
 603
 604 void wxListBox::Clear()
 605 {
 606     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 607
 608     gtk_list_clear_items( m_list, 0, GetCount() );
 609
 610     if ( GTK_LIST(m_list)->last_focus_child != NULL  )
 611     {
 612         // This should be NULL, I think.
 613         GTK_LIST(m_list)->last_focus_child = NULL;
 614     }
 615
 616     if ( HasClientObjectData() )
 617     {
 618         // destroy the data (due to Robert's idea of using wxList<wxObject>
 619         // and not wxList<wxClientData> we can't just say
 620         // m_clientList.DeleteContents(TRUE) - this would crash!
 621         wxNode *node = m_clientList.GetFirst();
 622         while ( node )
 623         {
 624             delete (wxClientData *)node->GetData();
 625             node = node->GetNext();
 626         }
 627     }
 628     m_clientList.Clear();
 629
 630     if ( m_strings )
 631         m_strings->Clear();
 632 }
 633
 634 void wxListBox::Delete( int n )
 635 {
 636     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 637
 638     GList *child = g_list_nth( m_list->children, n );
 639
 640     wxCHECK_RET( child, wxT("wrong listbox index") );
 641
 642     GList *list = g_list_append( (GList*) NULL, child->data );
 643     gtk_list_remove_items( m_list, list );
 644     g_list_free( list );
 645
 646     wxNode *node = m_clientList.Item( n );
 647     if ( node )
 648     {
 649         if ( m_clientDataItemsType == wxClientData_Object )
 650         {
 651             wxClientData *cd = (wxClientData*)node->GetData();
 652             delete cd;
 653         }
 654
 655         m_clientList.DeleteNode( node );
 656     }
 657
 658     if ( m_strings )
 659         m_strings->Remove(n);
 660 }
 661
 662 // ----------------------------------------------------------------------------
 663 // client data
 664 // ----------------------------------------------------------------------------
 665
 666 void wxListBox::DoSetItemClientData( int n, void* clientData )
 667 {
 668     wxCHECK_RET( m_widget != NULL, wxT("invalid listbox control") );
 669
 670     wxNode *node = m_clientList.Item( n );
 671     wxCHECK_RET( node, wxT("invalid index in wxListBox::DoSetItemClientData") );
 672
 673     node->SetData( (wxObject*) clientData );
 674 }
 675
 676 void* wxListBox::DoGetItemClientData( int n ) const
 677 {
 678     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid listbox control") );
 679
 680     wxNode *node = m_clientList.Item( n );
 681     wxCHECK_MSG( node, NULL, wxT("invalid index in wxListBox::DoGetItemClientData") );
 682
 683     return node->GetData();
 684 }
 685
 686 void wxListBox::DoSetItemClientObject( int n, wxClientData* clientData )
 687 {
 688     wxCHECK_RET( m_widget != NULL, wxT("invalid listbox control") );
 689
 690     wxNode *node = m_clientList.Item( n );
 691     wxCHECK_RET( node, wxT("invalid index in wxListBox::DoSetItemClientObject") );
 692
 693     // wxItemContainer already deletes data for us
 694
 695     node->SetData( (wxObject*) clientData );
 696 }
 697
 698 wxClientData* wxListBox::DoGetItemClientObject( int n ) const
 699 {
 700     wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, wxT("invalid listbox control") );
 701
 702     wxNode *node = m_clientList.Item( n );
 703     wxCHECK_MSG( node, (wxClientData *)NULL,
 704                  wxT("invalid index in wxListBox::DoGetItemClientObject") );
 705
 706     return (wxClientData*) node->GetData();
 707 }
 708
 709 // ----------------------------------------------------------------------------
 710 // string list access
 711 // ----------------------------------------------------------------------------
 712
 713 wxString wxListBox::GetRealLabel(GList *item) const
 714 {
 715     GtkBin *bin = GTK_BIN( item->data );
 716     GtkLabel *label = GTK_LABEL( bin->child );
 717
 718     wxString str;
 719
 720 #ifdef __WXGTK20__
 721     str = wxGTK_CONV_BACK( gtk_label_get_text( label ) );
 722 #else
 723     str = wxString( label->label );
 724 #endif
 725
 726 #if wxUSE_CHECKLISTBOX
 727     // checklistboxes have "[±] " prepended to their lables, remove it
 728     //
 729     // NB: 4 below is the length of wxCHECKLBOX_STRING from wx/gtk/checklst.h
 730     if ( m_hasCheckBoxes )
 731         str.erase(0, 4);
 732 #endif // wxUSE_CHECKLISTBOX
 733
 734     return str;
 735 }
 736
 737 void wxListBox::SetString( int n, const wxString &string )
 738 {
 739     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 740
 741     GList *child = g_list_nth( m_list->children, n );
 742     if (child)
 743     {
 744         GtkBin *bin = GTK_BIN( child->data );
 745         GtkLabel *label = GTK_LABEL( bin->child );
 746
 747         wxString str;
 748 #if wxUSE_CHECKLISTBOX
 749         if (m_hasCheckBoxes)
 750             str += wxCHECKLBOX_STRING;
 751 #endif // wxUSE_CHECKLISTBOX
 752         str += string;
 753
 754         gtk_label_set( label, wxGTK_CONV( str ) );
 755     }
 756     else
 757     {
 758         wxFAIL_MSG(wxT("wrong listbox index"));
 759     }
 760 }
 761
 762 wxString wxListBox::GetString( int n ) const
 763 {
 764     wxCHECK_MSG( m_list != NULL, wxT(""), wxT("invalid listbox") );
 765
 766     GList *child = g_list_nth( m_list->children, n );
 767     if (child)
 768     {
 769         return GetRealLabel(child);
 770     }
 771
 772     wxFAIL_MSG(wxT("wrong listbox index"));
 773
 774     return wxT("");
 775 }
 776
 777 int wxListBox::GetCount() const
 778 {
 779     wxCHECK_MSG( m_list != NULL, -1, wxT("invalid listbox") );
 780
 781     GList *children = m_list->children;
 782     return g_list_length(children);
 783 }
 784
 785 int wxListBox::FindString( const wxString &item ) const
 786 {
 787     wxCHECK_MSG( m_list != NULL, -1, wxT("invalid listbox") );
 788
 789     GList *child = m_list->children;
 790     int count = 0;
 791     while (child)
 792     {
 793         if ( GetRealLabel(child) == item )
 794             return count;
 795
 796         count++;
 797         child = child->next;
 798     }
 799
 800     // it's not an error if the string is not found -> no wxCHECK
 801
 802     return wxNOT_FOUND;
 803 }
 804
 805 // ----------------------------------------------------------------------------
 806 // selection
 807 // ----------------------------------------------------------------------------
 808
 809 int wxListBox::GetSelection() const
 810 {
 811     wxCHECK_MSG( m_list != NULL, -1, wxT("invalid listbox") );
 812
 813     GList *child = m_list->children;
 814     int count = 0;
 815     while (child)
 816     {
 817         if (GTK_WIDGET(child->data)->state == GTK_STATE_SELECTED) return count;
 818         count++;
 819         child = child->next;
 820     }
 821     return -1;
 822 }
 823
 824 int wxListBox::GetSelections( wxArrayInt& aSelections ) const
 825 {
 826     wxCHECK_MSG( m_list != NULL, -1, wxT("invalid listbox") );
 827
 828     // get the number of selected items first
 829     GList *child = m_list->children;
 830     int count = 0;
 831     for (child = m_list->children; child != NULL; child = child->next)
 832     {
 833         if (GTK_WIDGET(child->data)->state == GTK_STATE_SELECTED)
 834             count++;
 835     }
 836
 837     aSelections.Empty();
 838
 839     if (count > 0)
 840     {
 841         // now fill the list
 842         aSelections.Alloc(count); // optimization attempt
 843         int i = 0;
 844         for (child = m_list->children; child != NULL; child = child->next, i++)
 845         {
 846             if (GTK_WIDGET(child->data)->state == GTK_STATE_SELECTED)
 847                  aSelections.Add(i);
 848         }
 849     }
 850
 851     return count;
 852 }
 853
 854 bool wxListBox::IsSelected( int n ) const
 855 {
 856     wxCHECK_MSG( m_list != NULL, FALSE, wxT("invalid listbox") );
 857
 858     GList *target = g_list_nth( m_list->children, n );
 859
 860     wxCHECK_MSG( target, FALSE, wxT("invalid listbox index") );
 861
 862     return (GTK_WIDGET(target->data)->state == GTK_STATE_SELECTED) ;
 863 }
 864
 865 void wxListBox::SetSelection( int n, bool select )
 866 {
 867     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 868
 869     m_blockEvent = TRUE;
 870
 871     if (select)
 872     {
 873         if ((m_windowStyle & wxLB_SINGLE) != 0)
 874             gtk_list_unselect_item( m_list, m_prevSelection );
 875         gtk_list_select_item( m_list, n );
 876         m_prevSelection = n;
 877     }
 878     else
 879         gtk_list_unselect_item( m_list, n );
 880
 881     m_blockEvent = FALSE;
 882 }
 883
 884 void wxListBox::DoSetFirstItem( int n )
 885 {
 886     wxCHECK_RET( m_list, wxT("invalid listbox") );
 887
 888     if (gdk_pointer_is_grabbed () && GTK_WIDGET_HAS_GRAB (m_list))
 889         return;
 890
 891     // terribly efficient
 892     const gchar *vadjustment_key = "gtk-vadjustment";
 893     guint vadjustment_key_id = g_quark_from_static_string (vadjustment_key);
 894
 895     GtkAdjustment *adjustment =
 896        (GtkAdjustment*) gtk_object_get_data_by_id (GTK_OBJECT (m_list), vadjustment_key_id);
 897     wxCHECK_RET( adjustment, wxT("invalid listbox code") );
 898
 899     GList *target = g_list_nth( m_list->children, n );
 900     wxCHECK_RET( target, wxT("invalid listbox index") );
 901
 902     GtkWidget *item = GTK_WIDGET(target->data);
 903     wxCHECK_RET( item, wxT("invalid listbox code") );
 904
 905     if (item->allocation.y == -1)
 906     {
 907         wxlistbox_idle_struct* data = new wxlistbox_idle_struct;
 908         data->m_listbox = this;
 909         data->m_item = n;
 910         data->m_tag = gtk_idle_add_priority( 800, wxlistbox_idle_callback, (gpointer) data );
 911
 912         return;
 913     }
 914
 915     float y = item->allocation.y;
 916     if (y > adjustment->upper - adjustment->page_size)
 917         y = adjustment->upper - adjustment->page_size;
 918     gtk_adjustment_set_value( adjustment, y );
 919 }
 920
 921 // ----------------------------------------------------------------------------
 922 // helpers
 923 // ----------------------------------------------------------------------------
 924
 925 int wxListBox::GtkGetIndex( GtkWidget *item ) const
 926 {
 927     if (item)
 928     {
 929         GList *child = m_list->children;
 930         int count = 0;
 931         while (child)
 932         {
 933             if (GTK_WIDGET(child->data) == item) return count;
 934             count++;
 935             child = child->next;
 936         }
 937     }
 938     return -1;
 939 }
 940
 941 #if wxUSE_TOOLTIPS
 942 void wxListBox::ApplyToolTip( GtkTooltips *tips, const wxChar *tip )
 943 {
 944     GList *child = m_list->children;
 945     while (child)
 946     {
 947         gtk_tooltips_set_tip( tips, GTK_WIDGET( child->data ), wxConvCurrent->cWX2MB(tip), (gchar*) NULL );
 948         child = child->next;
 949     }
 950 }
 951 #endif // wxUSE_TOOLTIPS
 952
 953 GtkWidget *wxListBox::GetConnectWidget()
 954 {
 955     return GTK_WIDGET(m_list);
 956 }
 957
 958 bool wxListBox::IsOwnGtkWindow( GdkWindow *window )
 959 {
 960     if (GTK_WIDGET(m_list)->window == window) return TRUE;
 961
 962     GList *child = m_list->children;
 963     while (child)
 964     {
 965         GtkWidget *bin = GTK_WIDGET( child->data );
 966         if (bin->window == window) return TRUE;
 967         child = child->next;
 968     }
 969
 970     return FALSE;
 971 }
 972
 973 void wxListBox::ApplyWidgetStyle()
 974 {
 975     SetWidgetStyle();
 976
 977     if (m_backgroundColour.Ok())
 978     {
 979         GdkWindow *window = GTK_WIDGET(m_list)->window;
 980         if ( window )
 981         {
 982             m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
 983             gdk_window_set_background( window, m_backgroundColour.GetColor() );
 984             gdk_window_clear( window );
 985         }
 986     }
 987
 988     GList *child = m_list->children;
 989     while (child)
 990     {
 991         gtk_widget_set_style( GTK_WIDGET(child->data), m_widgetStyle );
 992
 993         GtkBin *bin = GTK_BIN( child->data );
 994         GtkWidget *label = GTK_WIDGET( bin->child );
 995         gtk_widget_set_style( label, m_widgetStyle );
 996
 997         child = child->next;
 998     }
 999 }
1000
1001 void wxListBox::OnInternalIdle()
1002 {
1003     wxCursor cursor = m_cursor;
1004     if (g_globalCursor.Ok()) cursor = g_globalCursor;
1005
1006     if (GTK_WIDGET(m_list)->window && cursor.Ok())
1007     {
1008         /* I now set the cursor the anew in every OnInternalIdle call
1009            as setting the cursor in a parent window also effects the
1010            windows above so that checking for the current cursor is
1011            not possible. */
1012
1013         gdk_window_set_cursor( GTK_WIDGET(m_list)->window, cursor.GetCursor() );
1014
1015         GList *child = m_list->children;
1016         while (child)
1017         {
1018             GtkBin *bin = GTK_BIN( child->data );
1019             GtkWidget *label = GTK_WIDGET( bin->child );
1020
1021             if (!label->window)
1022                 break;
1023             else
1024                 gdk_window_set_cursor( label->window, cursor.GetCursor() );
1025
1026             child = child->next;
1027         }
1028     }
1029
1030     if (g_delayedFocus == this)
1031     {
1032         if (GTK_WIDGET_REALIZED(m_widget))
1033         {
1034             gtk_widget_grab_focus( m_widget );
1035             g_delayedFocus = NULL;
1036         }
1037     }
1038
1039     UpdateWindowUI();
1040 }
1041
1042 wxSize wxListBox::DoGetBestSize() const
1043 {
1044     int lbWidth = 100;  // some defaults
1045     int lbHeight = 110;
1046     int wLine;
1047
1048     // Find the widest line
1049     for(int i = 0; i < GetCount(); i++) {
1050         wxString str(GetString(i));
1051         GetTextExtent(str, &wLine, NULL);
1052         lbWidth = wxMax(lbWidth, wLine);
1053     }
1054
1055     // Add room for the scrollbar
1056     lbWidth += wxSystemSettings::GetMetric(wxSYS_VSCROLL_X);
1057
1058     // And just a bit more
1059     int cx, cy;
1060     GetTextExtent( wxT("X"), &cx, &cy);
1061     lbWidth += 3 * cx;
1062
1063     // don't make the listbox too tall (limit height to around 10 items) but don't
1064     // make it too small neither
1065     lbHeight = (cy+4) * wxMin(wxMax(GetCount(), 3), 10);
1066
1067     return wxSize(lbWidth, lbHeight);
1068 }
1069
1070 void wxListBox::FixUpMouseEvent(GtkWidget *widget, wxCoord& x, wxCoord& y)
1071 {
1072     // the mouse event coords are relative to the listbox items, we need to
1073     // translate them to the normal client coords
1074     x += widget->allocation.x;
1075     y += widget->allocation.y;
1076 }
1077
1078 #endif // wxUSE_LISTBOX
1079