Struct Layer 

pub struct Layer {
    pub widget_id: u64,
    pub region: Rect,
    pub z_index: i32,
    pub lines: Vec<Vec<Segment>>,
}

A single widget layer in the compositor stack.

Contains the widget’s rendered output (as lines of segments), its on-screen bounding box, and its z-index for stacking order.

Fields

widget_id: u64

The widget ID that owns this layer.

region: Rect

Bounding box on screen.

z_index: i32

Stacking order (higher = on top).

lines: Vec<Vec<Segment>>

Per-line styled segment output.

Implementations

impl Layer

pub fn new( widget_id: u64, region: Rect, z_index: i32, lines: Vec<Vec<Segment>>, ) -> Self

Creates a new layer.

pub fn contains_row(&self, row: u16) -> bool

Returns true if the given row falls within this layer’s region.

pub fn line_for_row(&self, row: u16) -> Option<&Vec<Segment>>

Returns the segments for the given screen row, if the row is within this layer’s region.

Maps the screen row to a local line index and returns the corresponding segments.

Trait Implementations

impl Clone for Layer

fn clone(&self) -> Layer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Layer

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

Formats the value using the given formatter.