Struct StateLayer 

pub struct StateLayer { /* private fields */ }

Tracks a widget’s hover/focus/pressed/dragged interaction state and paints the M3 state-layer overlay for it. See the module docs.

Implementations

impl StateLayer

pub fn new() -> Self

A fresh state layer with every interaction flag clear.

pub fn set_hovered(&mut self, hovered: bool) -> bool

Record the widget’s hover state. Returns whether the flag changed.

pub fn set_focused(&mut self, focused: bool) -> bool

Record the widget’s focus state. Returns whether the flag changed.

pub fn set_pressed(&mut self, pressed: bool) -> bool

Record the widget’s pressed state. Returns whether the flag changed.

pub fn set_dragged(&mut self, dragged: bool) -> bool

Record the widget’s dragged state. Returns whether the flag changed.

pub fn is_active(&self) -> bool

Whether any interaction state is currently active (i.e. whether StateLayer::paint will paint anything).

pub fn opacity(&self) -> f32

The overlay opacity for the current state: the maximum of every active state’s opacity (see the module docs), or 0.0 if none are active.

pub fn paint( &self, _ctx: &mut PaintCtx<'_>, scene: &mut dyn PaintScene, shape_rect: Rect, radius: f64, content_color: Color, )

Paint the overlay: a filled rounded rect covering shape_rect with radius, filled with content_color at the current interaction opacity (replacing, not multiplying, content_color’s own alpha — the M3 spec expresses state layers as “content color at N% opacity”). A no-op when no interaction state is active.

Trait Implementations

impl Clone for StateLayer

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 StateLayer

impl Debug for StateLayer

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

Formats the value using the given formatter.

impl Default for StateLayer

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for StateLayer

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for StateLayer