virtual bool IsSelected(const wxTreeItemId& item) const = 0;
// is item text in bold font?
virtual bool IsBold(const wxTreeItemId& item) const = 0;
-#if wxABI_VERSION >= 20801
// is the control empty?
bool IsEmpty() const;
-#endif // wxABI 2.8.1+
// number of children
void ExpandAll();
// collapse the item without removing its children
virtual void Collapse(const wxTreeItemId& item) = 0;
-#if wxABI_VERSION >= 20801
// collapse the item and all its childs and thats childs
void CollapseAllChildren(const wxTreeItemId& item);
// collapse all items
void CollapseAll();
-#endif // wxABI 2.8.1+
// collapse the item and remove all children
virtual void CollapseAndReset(const wxTreeItemId& item) = 0;
// toggles the current state