TkTreeCtrl is a multi-column hierarchical listbox widget for the Tk GUI toolkit. It can display items that have a parent-child relationship with other itemsin a one- or two-dimensional arrangement. Items do also have a set of states, which are boolean properties.

Items may be spread about one or more columns. For each column of an item there is a style associated, which determines how to display the item's column taking into account the item's current state set. One column can be defined to display the data in a hierarchical structure.