Enum TraversalScopePolicy 

pub enum TraversalScopePolicy {
    Continue,
    Cycle,
}

Policy for a focus traversal scope, declared via the FocusScope wrapper widget. Controls what Tab / Shift+Tab does when it reaches the scope’s ends.

A scope groups + scopes the tab_index numbering of its descendants: two sibling scopes that both number their children 1, 2, 3 never interleave — each scope is an independent, ordered unit within its parent. This is Teksilo’s analogue of Flutter FocusTraversalGroup / WPF KeyboardNavigation.TabNavigation.

Variants

Continue

Tab flows out of the scope at its ends into the enclosing scope’s next member. The scope groups tab_index numbering without trapping focus — use for logical regions in a continuous Tab order (e.g. dock panels, where each panel numbers its own controls without colliding with sibling panels).

Cycle

Tab wraps within the scope and never exits via keyboard navigation. Use for modal dialogs — the one surface whose pattern (ARIA’s Dialog (Modal)) actually calls for containing focus.

Not for popovers or menus. Those implement Disclosure and Menu, which mandate the opposite: Tab is an exit gesture there, and the framework already answers it by dismissing the overlay focus leaves rather than by trapping focus inside it. Wrapping such an overlay in a Cycle scope defeats that — focus can no longer leave, so the dismissal never fires and the panel becomes keyboard-inescapable except via Escape.

Trait Implementations

impl Clone for TraversalScopePolicy

fn clone(&self) -> TraversalScopePolicy

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for TraversalScopePolicy

impl Debug for TraversalScopePolicy

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Eq for TraversalScopePolicy

impl PartialEq for TraversalScopePolicy

fn eq(&self, other: &TraversalScopePolicy) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for TraversalScopePolicy