897 def _tree_click(event):  argument
900     tree = event.widget
901     if tree.identify_element(event.x, event.y) == "image":
902         item = tree.identify_row(event.y)
910 def _tree_double_click(event):  argument
915     if not _in_heading(event):
916         return _tree_enter(event)
919 def _in_heading(event):  argument
922     tree = event.widget
924         tree.identify_region(event.x, event.y) in ("heading", "separator")
927 def _tree_enter(event):  argument
931     tree = event.widget
946 def _tree_toggle(event):  argument
950     tree = event.widget
1030     def tree_set_val(event):  argument
1036         sel = event.widget.focus()
1759     def jump_to_selected(event=None):  argument
1763         if event and (tree.identify_element(event.x, event.y) == "image" or
1764                       _in_heading(event)):