Struct Layer 

pub struct Layer<'a> { /* private fields */ }

Information about a compositing layer.

Implementations

impl<'a> Layer<'a>

pub fn builder( layer_id: impl Into<LayerId<'a>>, offset_x: f64, offset_y: f64, width: f64, height: f64, paint_count: u64, draws_content: bool, ) -> LayerBuilder<'a>

Creates a builder for this type with the required parameters:

• layer_id: The unique id for this layer.
• offset_x: Offset from parent layer, X coordinate.
• offset_y: Offset from parent layer, Y coordinate.
• width: Layer width.
• height: Layer height.
• paint_count: Indicates how many time this layer has painted.
• draws_content: Indicates whether this layer hosts any content, rather than being used for transform/scrolling purposes only.

pub fn layer_id(&self) -> &LayerId<'a>

The unique id for this layer.

pub fn parent_layer_id(&self) -> Option<&LayerId<'a>>

The id of parent (not present for root).

pub fn backend_node_id(&self) -> Option<&BackendNodeId>

The backend id for the node associated with this layer.

pub fn offset_x(&self) -> f64

Offset from parent layer, X coordinate.

pub fn offset_y(&self) -> f64

Offset from parent layer, Y coordinate.

pub fn width(&self) -> f64

Layer width.

pub fn height(&self) -> f64

Layer height.

pub fn transform(&self) -> Option<&[f64]>

Transformation matrix for layer, default is identity matrix

pub fn anchor_x(&self) -> Option<f64>

Transform anchor point X, absent if no transform specified

pub fn anchor_y(&self) -> Option<f64>

Transform anchor point Y, absent if no transform specified

pub fn anchor_z(&self) -> Option<f64>

Transform anchor point Z, absent if no transform specified

pub fn paint_count(&self) -> u64

Indicates how many time this layer has painted.

pub fn draws_content(&self) -> bool

Indicates whether this layer hosts any content, rather than being used for transform/scrolling purposes only.

pub fn invisible(&self) -> Option<bool>

Set if layer is not visible.

pub fn scroll_rects(&self) -> Option<&[ScrollRect<'a>]>

Rectangles scrolling on main thread only.

pub fn sticky_position_constraint( &self, ) -> Option<&StickyPositionConstraint<'a>>

Sticky position constraint information

Trait Implementations

impl<'a> Clone for Layer<'a>

fn clone(&self) -> Layer<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Layer<'a>

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

Formats the value using the given formatter.

impl<'a> Default for Layer<'a>

fn default() -> Layer<'a>

Returns the “default value” for a type.

impl<'de, 'a> Deserialize<'de> for Layer<'a>

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'a> Serialize for Layer<'a>

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.