static wxTreeItemId GetNextItem( const wxTreeCtrl& tree, const wxTreeItemId& item )
{
wxTreeItemId nextItem;
if( tree.IsExpanded( item ) )
{
wxTreeItemIdValue dummy;
nextItem = tree.GetFirstChild( item, dummy );
}
else
{
// Walk up levels until we find one that has a next sibling.
for ( wxTreeItemId walk = item; walk.IsOk(); walk = tree.GetItemParent( walk ) )
{
nextItem = tree.GetNextSibling( walk );
if( nextItem.IsOk() )
break;
}
}
return nextItem;
}
static wxTreeItemId GetPrevItem( const wxTreeCtrl& tree, const wxTreeItemId& item )
{
wxTreeItemId prevItem = tree.GetPrevSibling( item );
if( !prevItem.IsOk() )
{
prevItem = tree.GetItemParent( item );
}
else if( tree.IsExpanded( prevItem ) )
{
prevItem = tree.GetLastChild( prevItem );
}
return prevItem;
}