Enum BindingLevel 

pub enum BindingLevel {
    RepaintOnly,
    SubtreeRepaint,
    Relayout,
    Rebuild,
    AccessibilityOnly,
}

Dirty-tracking granularity for a property binding. Determined by the primitive widget implementor, not the consumer.

Variants

RepaintOnly

Visual-only change (color, opacity). Marks the widget for repaint; layout is skipped.

SubtreeRepaint

Visual-only change that propagates through the entire subtree. Used by enabled_when so that flipping a single node’s enabled_state marks the whole disabled subtree for repaint — leaves like IconWidget resolve their role color from crate::widget::PaintContext::effective_enabled, which the paint walker computes by AND-ing ancestor enabled-states. Without this propagation, only the bound node would repaint and descendants would keep their stale enabled colors.

Relayout

Size-affecting change (text content, constraint value). Marks the widget for relayout and propagates upward through ancestors.

Rebuild

Data-model change requiring the widget’s build() to re-run. Used by data-driven widgets (Repeater, ListView, TreeView) to trigger a full rebuild of their child subtree when the underlying data changes.

AccessibilityOnly

Accessibility-tree change only. Flips WidgetTree::a11y_dirty without touching repaint, layout, or rebuild flags. Orthogonal to the other levels — widgets whose accessibility output depends on a signal that does not visually affect the widget itself (e.g., a document_version bumped by every text edit) bind at this level so AccessKit’s tree rebuilds as soon as the underlying data changes, regardless of whether the widget needs repainting.

Trait Implementations

impl Clone for BindingLevel

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for BindingLevel

impl Debug for BindingLevel

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

Formats the value using the given formatter.

impl Eq for BindingLevel

impl PartialEq for BindingLevel

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for BindingLevel