Enum bevy::prelude::Val

pub enum Val {
    Auto,
    Px(f32),
    Percent(f32),
    Vw(f32),
    Vh(f32),
    VMin(f32),
    VMax(f32),
}

Represents the possible value types for layout properties.

This enum allows specifying values for various Style properties in different units, such as logical pixels, percentages, or automatically determined values.

Variants

Auto

Automatically determine the value based on the context and other Style properties.

Px(f32)

Set this value in logical pixels.

Percent(f32)

Set the value as a percentage of its parent node’s length along a specific axis.

If the UI node has no parent, the percentage is calculated based on the window’s length along the corresponding axis.

The chosen axis depends on the Style field set:

• For flex_basis, the percentage is relative to the main-axis length determined by the flex_direction.
• For gap, min_size, size, and max_size:
  • width is relative to the parent’s width.
  • height is relative to the parent’s height.
• For margin, padding, and border values: the percentage is relative to the parent node’s width.
• For positions, left and right are relative to the parent’s width, while bottom and top are relative to the parent’s height.

Vw(f32)

Set this value in percent of the viewport width

Vh(f32)

Set this value in percent of the viewport height

VMin(f32)

Set this value in percent of the viewport’s smaller dimension.

VMax(f32)

Set this value in percent of the viewport’s larger dimension.

Implementations

impl Val

pub const DEFAULT: Val = Self::Auto

pub const ZERO: Val = _

impl Val

pub fn resolve( self, parent_size: f32, viewport_size: Vec2 ) -> Result<f32, ValArithmeticError>

Resolves a Val to its value in logical pixels and returns this as an f32. Returns a ValArithmeticError::NonEvaluateable if the Val is impossible to resolve into a concrete value.

Note: If a Val::Px is resolved, it’s inner value is returned unchanged.

Trait Implementations

impl Clone for Val

fn clone(&self) -> Val

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Val

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

Formats the value using the given formatter.

impl Default for Val

fn default() -> Val

Returns the “default value” for a type.

impl Div<f32> for Val

type Output = Val

The resulting type after applying the / operator.

fn div(self, rhs: f32) -> <Val as Div<f32>>::Output

Performs the / operation.

impl DivAssign<f32> for Val

fn div_assign(&mut self, rhs: f32)

Performs the /= operation.

impl Enum for Val

where Val: Any + Send + Sync, f32: FromReflect + TypePath,

fn field(&self, __name_param: &str) -> Option<&(dyn Reflect + 'static)>

Returns a reference to the value of the field (in the current variant) with the given name.

fn field_at(&self, __index_param: usize) -> Option<&(dyn Reflect + 'static)>

Returns a reference to the value of the field (in the current variant) at the given index.

fn field_mut( &mut self, __name_param: &str ) -> Option<&mut (dyn Reflect + 'static)>

Returns a mutable reference to the value of the field (in the current variant) with the given name.

fn field_at_mut( &mut self, __index_param: usize ) -> Option<&mut (dyn Reflect + 'static)>

Returns a mutable reference to the value of the field (in the current variant) at the given index.

fn index_of(&self, __name_param: &str) -> Option<usize>

Returns the index of the field (in the current variant) with the given name.

fn name_at(&self, __index_param: usize) -> Option<&str>

Returns the name of the field (in the current variant) with the given index.

fn iter_fields(&self) -> VariantFieldIter<'_>

Returns an iterator over the values of the current variant’s fields.

fn field_len(&self) -> usize

Returns the number of fields in the current variant.

fn variant_name(&self) -> &str

The name of the current variant.

fn variant_index(&self) -> usize

The index of the current variant.

fn variant_type(&self) -> VariantType

The type of the current variant.

fn clone_dynamic(&self) -> DynamicEnum

fn is_variant(&self, variant_type: VariantType) -> bool

Returns true if the current variant’s type matches the given one.

fn variant_path(&self) -> String

Returns the full path to the current variant.

impl FromReflect for Val

where Val: Any + Send + Sync, f32: FromReflect + TypePath,

fn from_reflect(__param0: &(dyn Reflect + 'static)) -> Option<Val>

Constructs a concrete instance of Self from a reflected value.

fn take_from_reflect( reflect: Box<dyn Reflect> ) -> Result<Self, Box<dyn Reflect>>

Attempts to downcast the given value to Self using, constructing the value using from_reflect if that fails.

impl GetTypeRegistration for Val

where Val: Any + Send + Sync, f32: FromReflect + TypePath,

fn get_type_registration() -> TypeRegistration

impl Mul<f32> for Val

type Output = Val

The resulting type after applying the * operator.

fn mul(self, rhs: f32) -> <Val as Mul<f32>>::Output

Performs the * operation.

impl MulAssign<f32> for Val

fn mul_assign(&mut self, rhs: f32)

Performs the *= operation.

impl Neg for Val

type Output = Val

The resulting type after applying the - operator.

fn neg(self) -> <Val as Neg>::Output

Performs the unary - operation.

impl PartialEq for Val

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

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

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 Reflect for Val

where Val: Any + Send + Sync, f32: FromReflect + TypePath,

fn get_represented_type_info(&self) -> Option<&'static TypeInfo>

Returns the TypeInfo of the type represented by this value.

fn into_any(self: Box<Val>) -> Box<dyn Any>

Returns the value as a Box<dyn Any>.

fn as_any(&self) -> &(dyn Any + 'static)

Returns the value as a &dyn Any.

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Returns the value as a &mut dyn Any.

fn into_reflect(self: Box<Val>) -> Box<dyn Reflect>

Casts this type to a boxed reflected value.

fn as_reflect(&self) -> &(dyn Reflect + 'static)

Casts this type to a reflected value.

fn as_reflect_mut(&mut self) -> &mut (dyn Reflect + 'static)

Casts this type to a mutable reflected value.

fn clone_value(&self) -> Box<dyn Reflect>

Clones the value as a Reflect trait object.

fn set( &mut self, __value_param: Box<dyn Reflect> ) -> Result<(), Box<dyn Reflect>>

Performs a type-checked assignment of a reflected value to this value.

fn apply(&mut self, __value_param: &(dyn Reflect + 'static))

Applies a reflected value to this value.

fn reflect_kind(&self) -> ReflectKind

Returns a zero-sized enumeration of “kinds” of type.

fn reflect_ref(&self) -> ReflectRef<'_>

Returns an immutable enumeration of “kinds” of type.

fn reflect_mut(&mut self) -> ReflectMut<'_>

Returns a mutable enumeration of “kinds” of type.

fn reflect_owned(self: Box<Val>) -> ReflectOwned

Returns an owned enumeration of “kinds” of type.

fn reflect_hash(&self) -> Option<u64>

Returns a hash of the value (which includes the type).

fn reflect_partial_eq(&self, value: &(dyn Reflect + 'static)) -> Option<bool>

Returns a “partial equality” comparison result.

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

Debug formatter for the value.

fn serializable(&self) -> Option<Serializable<'_>>

Returns a serializable version of the value.

fn is_dynamic(&self) -> bool

Indicates whether or not this type is a dynamic type.

impl TypePath for Val

where Val: Any + Send + Sync,

fn type_path() -> &'static str

Returns the fully qualified path of the underlying type.

fn short_type_path() -> &'static str

Returns a short, pretty-print enabled path to the type.

fn type_ident() -> Option<&'static str>

Returns the name of the type, or None if it is anonymous.

fn crate_name() -> Option<&'static str>

Returns the name of the crate the type is in, or None if it is anonymous.

fn module_path() -> Option<&'static str>

Returns the path to the module the type is in, or None if it is anonymous.

impl Typed for Val

where Val: Any + Send + Sync, f32: FromReflect + TypePath,

fn type_info() -> &'static TypeInfo

Returns the compile-time info for the underlying type.

impl Copy for Val