CheckState

CheckState — tri-state checkbox value shared by the data layer and widgets.

Represents the three visual states of a checkbox: unchecked, checked, and indeterminate (partial — some but not all descendants are checked). Lives in teksilo-data rather than teksilo-widgets so that crate::TreeCheckedModel can produce Signal<CheckState> values without inverting the dependency graph.

From<bool> converts a plain two-state boolean (e.g. from a filter predicate) into Unchecked or Checked, making it easy to bridge non-tristate sources.

# use teksilo_data::CheckState;
let state = CheckState::Indeterminate;
assert!(state.is_filled());
assert_eq!(state.next_tristate(), CheckState::Unchecked);
assert_eq!(CheckState::from(true), CheckState::Checked);

Builder methods at a glance

is_filled, next_tristate

API reference

📖 Full rustdoc API for this module

pub enum CheckState

pub enum CheckState { /* variants */ }

Variants

• Unchecked — The checkbox is unchecked (no fill, no mark).
• Checked — The checkbox is fully checked (filled with a check mark).
• Indeterminate — Some but not all descendants are checked; shown as a dash or partial fill.

Methods

pub fn is_filled(self) -> bool

Whether the box shows a filled background (checked or indeterminate).

pub fn next_tristate(self) -> Self

Cycle to the next state: Unchecked → Checked → Indeterminate → Unchecked.