Enum MemberRole 

#[non_exhaustive]
pub enum MemberRole {
    Gesture,
    Pan(PanClaim),
    RawDrag,
    RawPreview,
}

What a member is competing as.

The role decides which threshold the member wins on and, for Pan, which axes the frozen TouchAction has to permit.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Gesture

A node whose own gesture recognizers (on_drag / on_swipe) are competing. This is what drag_observers used to hold, and it is what an ancestor of the pressed control is enrolled as.

Pan(PanClaim)

A scroll container that declared a PanClaim. Only ever enrolled for a pointer kind the claim’s devices mask admits and only when the pointer’s profile has a pan_slop — so never for a mouse.

RawDrag

A node that took the pointer by an explicit capture_pointer while the sequence was undecided, and drives its interaction from PointerMove rather than from a recognizer.

RawPreview

A node that answered Handled from the root-first preview pass. It has already won by the time it is enrolled; the role exists so WidgetTree::sequence_members can report why.

Trait Implementations

impl Clone for MemberRole

fn clone(&self) -> MemberRole

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for MemberRole

impl Debug for MemberRole

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

Formats the value using the given formatter.

impl PartialEq for MemberRole

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for MemberRole