Control
in the control treeThe parents (direct and indirect) receive all events from self
,
like the observers
.
If null
then self
is at the root of the tree, or not yet attached.
# Direct parent `Control` in the control tree
#
# The parents (direct and indirect) receive all events from `self`,
# like the `observers`.
#
# If `null` then `self` is at the root of the tree, or not yet attached.
var parent: nullable CompositeControl = null is private writable(set_parent)
lib/app/ui.nit:131,2--137,77