Split Layout::find_id, renaming to probe, try_probe #462
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These methods differ slightly:
fn Layout::try_probe(coord) -> Option<Id>
is auto-generated, returningNone
when!self.rect().contains(coord)
otherwise callingself.probe(coord)
fn Layout::probe(coord) -> Id
is customizable, returning either the result oftry_probe
on a child orself.id()
The former should not be customized (enforced by
#[widget]
macro). It is intended that onlytry_probe
gets called, though there's no real issue with callingprobe
.This change allows cleaner documentation and smaller implementations in user-defined widgets as well as enforcing that the method does not return
None
whenself.rect().contains(coord)
.