Enum atk::Layer

#[non_exhaustive]
pub enum Layer {
    Invalid,
    Background,
    Canvas,
    Widget,
    Mdi,
    Popup,
    Overlay,
    Window,
    // some variants omitted
}

Describes the layer of a component

These enumerated “layer values” are used when determining which UI rendering layer a component is drawn into, which can help in making determinations of when components occlude one another.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Invalid

The object does not have a layer

Background

This layer is reserved for the desktop background

Canvas

This layer is used for Canvas components

Widget

This layer is normally used for components

Mdi

This layer is used for layered components

Popup

This layer is used for popup components, such as menus

Overlay

This layer is reserved for future use.

Window

This layer is used for toplevel windows.

Trait Implementations

impl Clone for Layer

fn clone(&self) -> Layer

Returns a copy of the value.

const 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.

impl Display for Layer

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

Formats the value using the given formatter.

impl<'a> FromValue<'a> for Layer

type Checker = GenericValueTypeChecker<Layer>

Value type checker.

unsafe fn from_value(value: &'a Value) -> Self

Get the contained value from a Value.

impl Hash for Layer

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where
    H: Hasher,

Feeds a slice of this type into the given Hasher.

impl Ord for Layer

fn cmp(&self, other: &Layer) -> Ordering

This method returns an Ordering between self and other.

const fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

const fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

const fn clamp(self, min: Self, max: Self) -> Selfwhere
    Self: PartialOrd<Self>,

Restrict a value to a certain interval.

impl PartialEq<Layer> for Layer

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd<Layer> for Layer

fn partial_cmp(&self, other: &Layer) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StaticType for Layer

fn static_type() -> Type

Returns the type identifier of Self.

impl ToValue for Layer

fn to_value(&self) -> Value

Convert a value to a Value.

fn value_type(&self) -> Type

Returns the type identifer of self.

impl ValueType for Layer

type Type = Layer

Type to get the Type from.

impl Copy for Layer

impl Eq for Layer

impl StructuralEq for Layer

impl StructuralPartialEq for Layer