Struct SegmentSlots 

pub struct SegmentSlots(/* private fields */);

Shared handle to the geometry the widget publishes each layout pass and the chrome reads at paint time.

The widget’s place_children always runs before its children paint, so a chrome reading this during paint always sees the current pass’s values. Before the first layout it is empty, and the chrome must treat that as “nothing to draw” rather than as an error.

Implementations

impl SegmentSlots

pub fn new() -> Self

An empty handle, as produced before the first layout pass.

pub fn publish(&self, geometry: SegmentSlotGeometry)

Replace the published geometry. Called from the widget’s place_children.

pub fn with<R>(&self, f: impl FnOnce(&SegmentSlotGeometry) -> R) -> R

Read the published geometry.

pub fn slot_of(&self, segment: usize) -> Option<usize>

The slot a live segment currently occupies, if it is on the strip. Returns None for a segment that overflowed into the menu.

pub fn rect_of(&self, segment: usize) -> Option<Rect>

The rectangle a live segment currently occupies, if any.

pub fn len(&self) -> usize

Number of visible slots.

pub fn is_empty(&self) -> bool

Whether the strip currently shows no segments at all.

Trait Implementations

impl Clone for SegmentSlots

fn clone(&self) -> SegmentSlots

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SegmentSlots

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

Formats the value using the given formatter.

impl Default for SegmentSlots

fn default() -> SegmentSlots

Returns the “default value” for a type.