diff --git a/docs/latex/wx/treectrl.tex b/docs/latex/wx/treectrl.tex index c831025d97..70578d0cf0 100644 --- a/docs/latex/wx/treectrl.tex +++ b/docs/latex/wx/treectrl.tex @@ -274,6 +274,17 @@ Gets the normal item image. Returns the item label. +\membersection{wxTreeCtrl::GetLastChild}\label{wxtreectrlgetlastchild} + +\constfunc{wxTreeItemId}{GetLastChild}{\param{const wxTreeItemId\&}{ item}} + +Returns the last child of the item (or 0 if this item has no children). + +\wxheading{See also} + +\helpref{GetFirstChild}{wxtreectrlgetfirstchild}, +\helpref{GetLastChild}{wxtreectrlgetlastchild} + \membersection{wxTreeCtrl::GetNextChild}\label{wxtreectrlgetnextchild} \constfunc{wxTreeItemId}{GetNextChild}{\param{const wxTreeItemId\&}{ item}, \param{long\& }{cookie}} diff --git a/include/wx/generic/treectrl.h b/include/wx/generic/treectrl.h index cd3c90b8b6..014a048ce5 100644 --- a/include/wx/generic/treectrl.h +++ b/include/wx/generic/treectrl.h @@ -333,6 +333,8 @@ public: wxTreeItemId GetFirstChild(const wxTreeItemId& item, long& cookie) const; // get the next child wxTreeItemId GetNextChild(const wxTreeItemId& item, long& cookie) const; + // get the last child of this item - this method doesn't use cookies + wxTreeItemId GetLastChild(const wxTreeItemId& item) const; // get the next sibling of this item wxTreeItemId GetNextSibling(const wxTreeItemId& item) const; diff --git a/include/wx/gtk/treectrl.h b/include/wx/gtk/treectrl.h index 34ac6d2df6..7598a25c5a 100644 --- a/include/wx/gtk/treectrl.h +++ b/include/wx/gtk/treectrl.h @@ -264,8 +264,10 @@ public: // get the first child of this item wxTreeItemId GetFirstChild(const wxTreeItemId& item, long& cookie) const; - // get the next child + // get the next child (after GetFirstChild or GetNextChild) wxTreeItemId GetNextChild(const wxTreeItemId& item, long& cookie) const; + // get the last child of this item - this method doesn't use cookies + wxTreeItemId GetLastChild(const wxTreeItemId& item) const; // get the next sibling of this item wxTreeItemId GetNextSibling(const wxTreeItemId& item) const; diff --git a/include/wx/gtk1/treectrl.h b/include/wx/gtk1/treectrl.h index 34ac6d2df6..7598a25c5a 100644 --- a/include/wx/gtk1/treectrl.h +++ b/include/wx/gtk1/treectrl.h @@ -264,8 +264,10 @@ public: // get the first child of this item wxTreeItemId GetFirstChild(const wxTreeItemId& item, long& cookie) const; - // get the next child + // get the next child (after GetFirstChild or GetNextChild) wxTreeItemId GetNextChild(const wxTreeItemId& item, long& cookie) const; + // get the last child of this item - this method doesn't use cookies + wxTreeItemId GetLastChild(const wxTreeItemId& item) const; // get the next sibling of this item wxTreeItemId GetNextSibling(const wxTreeItemId& item) const; diff --git a/include/wx/msw/treectrl.h b/include/wx/msw/treectrl.h index 48c0d60504..3864830c01 100644 --- a/include/wx/msw/treectrl.h +++ b/include/wx/msw/treectrl.h @@ -299,6 +299,8 @@ public: wxTreeItemId GetFirstChild(const wxTreeItemId& item, long& _cookie) const; // get the next child wxTreeItemId GetNextChild(const wxTreeItemId& item, long& _cookie) const; + // get the last child of this item - this method doesn't use cookies + wxTreeItemId GetLastChild(const wxTreeItemId& item) const; // get the next sibling of this item wxTreeItemId GetNextSibling(const wxTreeItemId& item) const; diff --git a/src/generic/treectrl.cpp b/src/generic/treectrl.cpp index 90284a5ee3..99b984f77d 100644 --- a/src/generic/treectrl.cpp +++ b/src/generic/treectrl.cpp @@ -294,7 +294,7 @@ wxGenericTreeItem *wxGenericTreeItem::HitTest( const wxPoint& point, onButton = TRUE; return this; } - + int w = m_width; if (m_image != -1) w += 20; @@ -359,20 +359,20 @@ void wxTreeCtrl::Init() m_imageListNormal = m_imageListState = (wxImageList *) NULL; - + m_dragCount = 0; } bool wxTreeCtrl::Create(wxWindow *parent, wxWindowID id, const wxPoint& pos, const wxSize& size, - long style, - const wxValidator &validator, - const wxString& name ) + long style, + const wxValidator &validator, + const wxString& name ) { Init(); wxScrolledWindow::Create( parent, id, pos, size, style|wxHSCROLL|wxVSCROLL, name ); - + SetValidator( validator ); SetBackgroundColour( *wxWHITE ); @@ -556,7 +556,7 @@ wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& item, long& cookie) co wxArrayTreeItems& children = item.m_pItem->GetChildren(); if ( (size_t)cookie < children.Count() ) { - return item.m_pItem->GetChildren().Item(cookie++); + return children.Item(cookie++); } else { @@ -565,6 +565,14 @@ wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& item, long& cookie) co } } +wxTreeItemId wxTreeCtrl::GetLastChild(const wxTreeItemId& item) const +{ + wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" ); + + wxArrayTreeItems& children = item.m_pItem->GetChildren(); + return children.IsEmpty() ? wxTreeItemId() : children.Last(); +} + wxTreeItemId wxTreeCtrl::GetNextSibling(const wxTreeItemId& item) const { wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" ); @@ -778,9 +786,9 @@ void wxTreeCtrl::Expand(const wxTreeItemId& itemId) { wxGenericTreeItem *item = itemId.m_pItem; - if ( !item->HasPlus() ) + if ( !item->HasPlus() ) return; - + if ( item->IsExpanded() ) return; @@ -898,7 +906,7 @@ void wxTreeCtrl::EnsureVisible(const wxTreeItemId& item) int start_y = 0; ViewStart( &start_x, &start_y ); start_y *= 10; - + int client_h = 0; int client_w = 0; GetClientSize( &client_w, &client_h ); @@ -910,7 +918,7 @@ void wxTreeCtrl::EnsureVisible(const wxTreeItemId& item) m_anchor->GetSize( x, y ); y += 2*m_lineHeight; int x_pos = GetScrollPos( wxHORIZONTAL ); - SetScrollbars( 10, 10, x/10, y/10, x_pos, (item_y-client_h/2)/10 ); + SetScrollbars( 10, 10, x/10, y/10, x_pos, (item_y-client_h/2)/10 ); return; } @@ -973,7 +981,7 @@ void wxTreeCtrl::SortChildren(const wxTreeItemId& itemId) wxCHECK_RET( itemId.IsOk(), "invalid tree item" ); wxGenericTreeItem *item = itemId.m_pItem; - + wxCHECK_RET( !s_treeBeingSorted, "wxTreeCtrl::SortChildren is not reentrant" ); @@ -983,7 +991,7 @@ void wxTreeCtrl::SortChildren(const wxTreeItemId& itemId) s_treeBeingSorted = this; children.Sort(tree_ctrl_compare_func); s_treeBeingSorted = NULL; - + m_dirty = TRUE; } //else: don't make the tree dirty as nothing changed @@ -1036,7 +1044,7 @@ void wxTreeCtrl::PaintItem(wxGenericTreeItem *item, wxDC& dc) /* render bold items in bold */ wxFont fontOld; wxFont fontNew; - + if (item->IsBold()) { fontOld = dc.GetFont(); @@ -1066,7 +1074,7 @@ void wxTreeCtrl::PaintItem(wxGenericTreeItem *item, wxDC& dc) { m_imageListNormal->GetSize( item->GetSelectedImage(), image_w, image_h ); image_w += 4; - } + } else if (item->GetImage() != -1) { m_imageListNormal->GetSize( item->GetImage(), image_w, image_h ); @@ -1136,9 +1144,9 @@ void wxTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level, int & dc.DrawLine( horizX+13, y, horizX+18, y ); if (!item->IsExpanded()) - { + { dc.DrawLine( horizX+15, y-2, horizX+15, y+3 ); - } + } } if (item->HasHilight()) @@ -1213,154 +1221,187 @@ void wxTreeCtrl::OnPaint( wxPaintEvent &WXUNUSED(event) ) void wxTreeCtrl::OnSetFocus( wxFocusEvent &WXUNUSED(event) ) { m_hasFocus = TRUE; - + if (m_current) RefreshLine( m_current ); } void wxTreeCtrl::OnKillFocus( wxFocusEvent &WXUNUSED(event) ) { m_hasFocus = FALSE; - + if (m_current) RefreshLine( m_current ); } void wxTreeCtrl::OnChar( wxKeyEvent &event ) { - wxTreeEvent te( wxEVT_COMMAND_TREE_KEY_DOWN, GetId() ); - te.m_code = event.KeyCode(); - te.SetEventObject( this ); - GetEventHandler()->ProcessEvent( te ); + wxTreeEvent te( wxEVT_COMMAND_TREE_KEY_DOWN, GetId() ); + te.m_code = event.KeyCode(); + te.SetEventObject( this ); + GetEventHandler()->ProcessEvent( te ); - if (m_current == 0) - { - event.Skip(); - return; - } + if (m_current == 0) + { + event.Skip(); + return; + } - switch (event.KeyCode()) - { - case '+': - case WXK_ADD: - if (m_current->HasPlus() && !IsExpanded(m_current)) - { - Expand(m_current); - } - break; - - case '-': - case WXK_SUBTRACT: - if (IsExpanded(m_current)) - { - Collapse(m_current); - } - break; - - case '*': - case WXK_MULTIPLY: - Toggle(m_current); - break; - - case ' ': - case WXK_RETURN: - { - wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() ); - event.m_item = m_current; - event.m_code = 0; - event.SetEventObject( this ); - GetEventHandler()->ProcessEvent( event ); - } - break; - - case WXK_UP: - { - wxTreeItemId prev = GetPrevSibling( m_current ); - if (!prev) - { - prev = GetParent( m_current ); - long cockie = 0; - wxTreeItemId current = m_current; - if (current == GetFirstChild( prev, cockie )) - { - // otherwise we return to where we came from - SelectItem( prev ); - EnsureVisible( prev ); - break; - } - } - if (prev) - { - while (IsExpanded(prev)) - { - int c = (int)GetChildrenCount( prev, FALSE ); - long cockie = 0; - prev = GetFirstChild( prev, cockie ); - for (int i = 0; i < c-1; i++) - prev = GetNextSibling( prev ); - } - SelectItem( prev ); - EnsureVisible( prev ); - } - } - break; - case WXK_LEFT: - { - wxTreeItemId prev = GetPrevSibling( m_current ); - if (prev != 0) - { - SelectItem( prev ); - EnsureVisible( prev ); - } - else - { - prev = GetParent( m_current ); - if (prev) - { - EnsureVisible( prev ); - SelectItem( prev ); - } - } - } - break; - - case WXK_RIGHT: - // this works the same as the down arrow except that we also expand the - // item if it wasn't expanded yet - Expand(m_current); - // fall through - - case WXK_DOWN: - { - if (IsExpanded(m_current)) - { - long cookie = 0; - wxTreeItemId child = GetFirstChild( m_current, cookie ); - SelectItem( child ); - EnsureVisible( child ); - } - else - { - wxTreeItemId next = GetNextSibling( m_current ); - if (next == 0) - { - wxTreeItemId current = m_current; - while (current && !next) + switch (event.KeyCode()) + { + case '+': + case WXK_ADD: + if (m_current->HasPlus() && !IsExpanded(m_current)) { - current = GetParent( current ); - if (current) next = GetNextSibling( current ); + Expand(m_current); } - } - if (next != 0) - { - SelectItem( next ); - EnsureVisible( next ); - } - } - } - break; + break; - default: - event.Skip(); - } + case '-': + case WXK_SUBTRACT: + if (IsExpanded(m_current)) + { + Collapse(m_current); + } + break; + + case '*': + case WXK_MULTIPLY: + Toggle(m_current); + break; + + case ' ': + case WXK_RETURN: + { + wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() ); + event.m_item = m_current; + event.m_code = 0; + event.SetEventObject( this ); + GetEventHandler()->ProcessEvent( event ); + } + break; + + // up goes to the previous sibling or to the last of its children if + // it's expanded + case WXK_UP: + { + wxTreeItemId prev = GetPrevSibling( m_current ); + if (!prev) + { + prev = GetParent( m_current ); + long cockie = 0; + wxTreeItemId current = m_current; + if (current == GetFirstChild( prev, cockie )) + { + // otherwise we return to where we came from + SelectItem( prev ); + EnsureVisible( prev ); + break; + } + } + if (prev) + { + while (IsExpanded(prev)) + { + int c = (int)GetChildrenCount( prev, FALSE ); + long cockie = 0; + prev = GetFirstChild( prev, cockie ); + for (int i = 0; i < c-1; i++) + prev = GetNextSibling( prev ); + } + SelectItem( prev ); + EnsureVisible( prev ); + } + } + break; + + // left arrow goes to the parent + case WXK_LEFT: + { + wxTreeItemId prev = GetParent( m_current ); + if (prev) + { + EnsureVisible( prev ); + SelectItem( prev ); + } + } + break; + + case WXK_RIGHT: + // this works the same as the down arrow except that we also expand the + // item if it wasn't expanded yet + Expand(m_current); + // fall through + + case WXK_DOWN: + { + if (IsExpanded(m_current)) + { + long cookie = 0; + wxTreeItemId child = GetFirstChild( m_current, cookie ); + SelectItem( child ); + EnsureVisible( child ); + } + else + { + wxTreeItemId next = GetNextSibling( m_current ); + if (next == 0) + { + wxTreeItemId current = m_current; + while (current && !next) + { + current = GetParent( current ); + if (current) next = GetNextSibling( current ); + } + } + if (next != 0) + { + SelectItem( next ); + EnsureVisible( next ); + } + } + } + break; + + // selects the last visible tree item + case WXK_END: + { + wxTreeItemId last = GetRootItem(); + + while ( last.IsOk() && IsExpanded(last) ) + { + wxTreeItemId lastChild = GetLastChild(last); + + // it may happen if the item was expanded but then all of + // its children have been deleted - so IsExpanded() returned + // TRUE, but GetLastChild() returned invalid item + if ( !lastChild ) + break; + + last = lastChild; + } + + if ( last.IsOk() ) + { + EnsureVisible( last ); + SelectItem( last ); + } + } + break; + + // selects the root item + case WXK_HOME: + { + wxTreeItemId prev = GetRootItem(); + if (prev) + { + EnsureVisible( prev ); + SelectItem( prev ); + } + } + break; + + default: + event.Skip(); + } } wxTreeItemId wxTreeCtrl::HitTest(const wxPoint& point, int& WXUNUSED(flags)) @@ -1376,7 +1417,7 @@ void wxTreeCtrl::OnMouse( wxMouseEvent &event ) if ( !(event.LeftDown() || event.LeftDClick() || event.Dragging()) ) return; if ( !m_anchor ) return; - + wxClientDC dc(this); PrepareDC(dc); long x = dc.DeviceToLogicalX( (long)event.GetX() ); @@ -1384,7 +1425,7 @@ void wxTreeCtrl::OnMouse( wxMouseEvent &event ) bool onButton = FALSE; wxGenericTreeItem *item = m_anchor->HitTest( wxPoint(x,y), onButton ); - + if (item == NULL) return; /* we hit the blank area */ if (event.Dragging()) @@ -1392,7 +1433,7 @@ void wxTreeCtrl::OnMouse( wxMouseEvent &event ) if (m_dragCount == 2) /* small drag latency (3?) */ { m_dragCount = 0; - + wxTreeEvent nevent(wxEVT_COMMAND_TREE_BEGIN_DRAG, GetId()); nevent.m_item = m_current; nevent.SetEventObject(this); @@ -1404,7 +1445,7 @@ void wxTreeCtrl::OnMouse( wxMouseEvent &event ) } return; } - + if (!IsSelected(item)) SelectItem(item); /* we dont support multiple selections, BTW */ if (event.LeftDClick()) @@ -1448,7 +1489,7 @@ void wxTreeCtrl::CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int level, i if ( !item->IsExpanded() ) { - /* we dont need to calculate collapsed branches */ + /* we dont need to calculate collapsed branches */ return; } @@ -1507,7 +1548,7 @@ void wxTreeCtrl::RefreshLine( wxGenericTreeItem *item ) rect.y = dc.LogicalToDeviceY( item->GetY() - 2 ); rect.width = 1000; rect.height = dc.GetCharHeight() + 6; - + Refresh( TRUE, &rect ); } diff --git a/src/gtk/treectrl.cpp b/src/gtk/treectrl.cpp index 8768e4e867..b1df8d5abc 100644 --- a/src/gtk/treectrl.cpp +++ b/src/gtk/treectrl.cpp @@ -6,7 +6,7 @@ // Created: 07/05/98 // RCS-ID: $Id$ // Copyright: (c) Denis Pershin -// Licence: wxWindows licence +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// #ifdef __GNUG__ @@ -110,7 +110,7 @@ bool wxTreeCtrl::Create(wxWindow *parent, wxWindowID id, const wxPoint& pos, y = 0; m_needParent = TRUE; - + printf("precreate\n"); PreCreation( parent, id, pos, size, style, name ); @@ -135,14 +135,14 @@ printf("5\n"); printf("Robert's new insertion code :-)\n"); m_parent->AddChild( this ); (m_parent->m_insertCallback)( m_parent, this ); - + printf("postcreate\n"); PostCreation(); gtk_widget_realize(GTK_WIDGET(m_tree)); Show(TRUE); - + return TRUE; } @@ -348,6 +348,16 @@ wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& item, long& cookie) co return GTK_TREE_ITEM(g_list_nth(GTK_TREE(parent)->children, cookie)->data); } +wxTreeItemId wxTreeCtrl::GetLastChild(const wxTreeItemId& item) const +{ + GtkTreeItem *p = (GtkTreeItem *)item; + GtkWidget *parent = GTK_WIDGET(p)->parent; + + wxCHECK_MSG( GTK_IS_TREE(parent), NULL, "invalid tree item" ); + + return GTK_TREE_ITEM(g_list_last(GTK_TREE(parent)->children)->data); +} + wxTreeItemId wxTreeCtrl::GetNextSibling(const wxTreeItemId& item) const { GtkTreeItem *p = (GtkTreeItem *)item; GtkWidget *parent = GTK_WIDGET(p)->parent; @@ -469,13 +479,13 @@ wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parent, wxTreeItemId wxTreeCtrl::AppendItem(const wxTreeItemId& parent, const wxString& text, int image, int selectedImage, - wxTreeItemData *data) { + wxTreeItemData *data) { return p_InsertItem(parent, text, image, selectedImage, data); } wxTreeItemId wxTreeCtrl::p_InsertItem(GtkTreeItem *p, const wxString& text, int image, int selectedImage, - wxTreeItemData *data) { + wxTreeItemData *data) { GtkTreeItem *item; printf("begin insert\n"); @@ -719,7 +729,7 @@ long wxTreeCtrl::GetChild(long item) const { if (next != NULL) return (long)gtk_object_get_data(GTK_OBJECT(next), "id"); - + return (-1); } @@ -732,7 +742,7 @@ long wxTreeCtrl::GetFirstVisibleItem(void) const { if (next != NULL) return (long)gtk_object_get_data(GTK_OBJECT(next), "id"); - + return (-1); } @@ -747,7 +757,7 @@ long wxTreeCtrl::GetNextVisibleItem(long item) const { if (next != NULL) return (long)gtk_object_get_data(GTK_OBJECT(next), "id"); - + return (-1); } diff --git a/src/gtk1/treectrl.cpp b/src/gtk1/treectrl.cpp index 8768e4e867..b1df8d5abc 100644 --- a/src/gtk1/treectrl.cpp +++ b/src/gtk1/treectrl.cpp @@ -6,7 +6,7 @@ // Created: 07/05/98 // RCS-ID: $Id$ // Copyright: (c) Denis Pershin -// Licence: wxWindows licence +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// #ifdef __GNUG__ @@ -110,7 +110,7 @@ bool wxTreeCtrl::Create(wxWindow *parent, wxWindowID id, const wxPoint& pos, y = 0; m_needParent = TRUE; - + printf("precreate\n"); PreCreation( parent, id, pos, size, style, name ); @@ -135,14 +135,14 @@ printf("5\n"); printf("Robert's new insertion code :-)\n"); m_parent->AddChild( this ); (m_parent->m_insertCallback)( m_parent, this ); - + printf("postcreate\n"); PostCreation(); gtk_widget_realize(GTK_WIDGET(m_tree)); Show(TRUE); - + return TRUE; } @@ -348,6 +348,16 @@ wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& item, long& cookie) co return GTK_TREE_ITEM(g_list_nth(GTK_TREE(parent)->children, cookie)->data); } +wxTreeItemId wxTreeCtrl::GetLastChild(const wxTreeItemId& item) const +{ + GtkTreeItem *p = (GtkTreeItem *)item; + GtkWidget *parent = GTK_WIDGET(p)->parent; + + wxCHECK_MSG( GTK_IS_TREE(parent), NULL, "invalid tree item" ); + + return GTK_TREE_ITEM(g_list_last(GTK_TREE(parent)->children)->data); +} + wxTreeItemId wxTreeCtrl::GetNextSibling(const wxTreeItemId& item) const { GtkTreeItem *p = (GtkTreeItem *)item; GtkWidget *parent = GTK_WIDGET(p)->parent; @@ -469,13 +479,13 @@ wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parent, wxTreeItemId wxTreeCtrl::AppendItem(const wxTreeItemId& parent, const wxString& text, int image, int selectedImage, - wxTreeItemData *data) { + wxTreeItemData *data) { return p_InsertItem(parent, text, image, selectedImage, data); } wxTreeItemId wxTreeCtrl::p_InsertItem(GtkTreeItem *p, const wxString& text, int image, int selectedImage, - wxTreeItemData *data) { + wxTreeItemData *data) { GtkTreeItem *item; printf("begin insert\n"); @@ -719,7 +729,7 @@ long wxTreeCtrl::GetChild(long item) const { if (next != NULL) return (long)gtk_object_get_data(GTK_OBJECT(next), "id"); - + return (-1); } @@ -732,7 +742,7 @@ long wxTreeCtrl::GetFirstVisibleItem(void) const { if (next != NULL) return (long)gtk_object_get_data(GTK_OBJECT(next), "id"); - + return (-1); } @@ -747,7 +757,7 @@ long wxTreeCtrl::GetNextVisibleItem(long item) const { if (next != NULL) return (long)gtk_object_get_data(GTK_OBJECT(next), "id"); - + return (-1); } diff --git a/src/msw/treectrl.cpp b/src/msw/treectrl.cpp index 7673df85ed..577946bc0b 100644 --- a/src/msw/treectrl.cpp +++ b/src/msw/treectrl.cpp @@ -457,6 +457,22 @@ wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& WXUNUSED(item), return l; } +wxTreeItemId wxTreeCtrl::GetLastChild(const wxTreeItemId& item) const +{ + // can this be done more efficiently? + long cookie; + + wxTreeItemId childLast, + child = GetFirstChild(last, cookie); + while ( child.IsOk() ) + { + childLast = child; + child = GetNextChild(last, cookie); + } + + return childLast; +} + wxTreeItemId wxTreeCtrl::GetNextSibling(const wxTreeItemId& item) const { return wxTreeItemId((WXHTREEITEM) TreeView_GetNextSibling(wxhWnd, (HTREEITEM) (WXHTREEITEM) item));