TixHList is the Tix Hierarchical Listbox Widget. You can use it to display any data that have a hierarchical structure. For example, the HList widget in figure 4-1 displays a Unix file system directory tree; the HList widget in figure 4-1 displays the corporate hierarchy of a hypothetical company. As shown in these two figures, the entries inside the TixHList widget are indented can be optionally connected by branch lines according to their positions in the hierarchy.
(Figure 4-1) Examples of the TixHList Widget