Struct RegionMap 

pub struct RegionMap<T: Ord> { /* private fields */ }

A map from ID to rectangle, with hit-testing support.

Regions are tested in insertion order (via BTreeMap iteration). Explicitly pass a slice of IDs to control the hit-test order (e.g., reverse for topmost-first).

Implementations

impl<T: Ord> RegionMap<T>

pub fn new() -> Self

pub fn ids(&self) -> Vec<T>

where T: Copy,

pub fn set(&mut self, id: T, rect: LayoutRect)

pub fn get(&self, id: &T) -> Option<LayoutRect>

pub fn remove(&mut self, id: &T)

pub fn is_empty(&self) -> bool

pub fn contains_key(&self, id: &T) -> bool

pub fn hit_test(&self, col: u16, row: u16, ids: &[T]) -> Option<T>

where T: Copy,

Find the first ID (in the given order) whose region contains (col, row).

Trait Implementations

impl<T: Clone + Ord> Clone for RegionMap<T>

fn clone(&self) -> RegionMap<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug + Ord> Debug for RegionMap<T>

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

Formats the value using the given formatter.

impl<T: Ord> Default for RegionMap<T>

fn default() -> Self

Returns the “default value” for a type.