Enum DefiniteLength 

pub enum DefiniteLength {
    Absolute(AbsoluteLength),
    Fraction(f32),
}

A non-auto length that can be defined in pixels, rems, or percent of parent.

This enum represents lengths that have a specific value, as opposed to lengths that are automatically determined by the context. It includes absolute lengths in pixels or rems, and relative lengths as a fraction of the parent’s size.

Variants

Absolute(AbsoluteLength)

An absolute length specified in pixels or rems.

Fraction(f32)

A relative length specified as a fraction of the parent’s size, between 0 and 1.

Implementations

impl DefiniteLength

pub fn to_pixels(self, base_size: AbsoluteLength, rem_size: Pixels) -> Pixels

Converts the DefiniteLength to Pixels based on a given base_size and rem_size.

If the DefiniteLength is an absolute length, it will be directly converted to Pixels. If it is a fraction, the fraction will be multiplied by the base_size to get the length in pixels.

Arguments

• base_size - The base size in AbsoluteLength to which the fraction will be applied.
• rem_size - The size of one rem in pixels, used to convert rems to pixels.

Returns

Returns the DefiniteLength as Pixels.

Examples

let length_in_pixels = DefiniteLength::Absolute(AbsoluteLength::Pixels(px(42.0)));
let length_in_rems = DefiniteLength::Absolute(AbsoluteLength::Rems(rems(2.0)));
let length_as_fraction = DefiniteLength::Fraction(0.5);
let base_size = AbsoluteLength::Pixels(px(100.0));
let rem_size = px(16.0);

assert_eq!(length_in_pixels.to_pixels(base_size, rem_size), Pixels::from(42.0));
assert_eq!(length_in_rems.to_pixels(base_size, rem_size), Pixels::from(32.0));
assert_eq!(length_as_fraction.to_pixels(base_size, rem_size), Pixels::from(50.0));

Trait Implementations

impl Clone for DefiniteLength

fn clone(&self) -> DefiniteLength

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for DefiniteLength

impl Debug for DefiniteLength

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

Formats the value using the given formatter.

impl Default for DefiniteLength

fn default() -> DefiniteLength

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for DefiniteLength

fn deserialize<D>( deserializer: D, ) -> Result<DefiniteLength, <D as Deserializer<'de>>::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for DefiniteLength

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

Formats the value using the given formatter.

impl From<AbsoluteLength> for DefiniteLength

fn from(length: AbsoluteLength) -> DefiniteLength

Converts to this type from the input type.

impl From<Pixels> for DefiniteLength

fn from(pixels: Pixels) -> DefiniteLength

Converts to this type from the input type.

impl From<Rems> for DefiniteLength

fn from(rems: Rems) -> DefiniteLength

Converts to this type from the input type.

impl IsZero for DefiniteLength

fn is_zero(&self) -> bool

Determines if the value is zero.

impl JsonSchema for DefiniteLength

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn json_schema(_generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

impl Neg for DefiniteLength

type Output = DefiniteLength

The resulting type after applying the - operator.

fn neg(self) -> DefiniteLength

Performs the unary - operation.

impl PartialEq for DefiniteLength

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl Serialize for DefiniteLength

fn serialize<S>( &self, serializer: S, ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for DefiniteLength

impl TryFrom<&str> for DefiniteLength

type Error = Error

The type returned in the event of a conversion error.

fn try_from( value: &str, ) -> Result<DefiniteLength, <DefiniteLength as TryFrom<&str>>::Error>

Performs the conversion.