GtkTreeView handle these automatically
for you. column should be set to the column in tree.view's model
containing the tooltip texts, or -1 to disable this feature.gtkTreeViewSetTooltipColumn(object, column)objectcolumntree.view's model"has-tooltip" will be set to TRUE and
tree.view will connect a "query-tooltip" signal handler.
Note that the signal handler sets the text with gtkTooltipSetMarkup,
so &,