Enum druid::KeyOrValue

pub enum KeyOrValue<T> {
    Concrete(T),
    Key(Key<T>),
}

Either a concrete T or a Key<T> that can be resolved in the Env.

This is a way to allow widgets to interchangeably use either a specific value or a value from the environment for some purpose.

Variants

Concrete(T)

A concrete Value of type T.

Key(Key<T>)

A Key<T> that can be resolved to a value in the Env.

Implementations

impl<T: ValueType> KeyOrValue<T>

pub fn resolve(&self, env: &Env) -> T

Resolve the concrete type T from this KeyOrValue, using the provided Env if required.

Trait Implementations

impl<T: Clone> Clone for KeyOrValue<T>

fn clone(&self) -> KeyOrValue<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Data> Data for KeyOrValue<T>

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

Determine whether two values are the same.

impl<T: Debug> Debug for KeyOrValue<T>

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

Formats the value using the given formatter.

impl From<(f64, f64)> for KeyOrValue<Insets>

fn from(f: (f64, f64)) -> KeyOrValue<Insets>

Converts to this type from the input type.

impl From<(f64, f64, f64, f64)> for KeyOrValue<Insets>

fn from(f: (f64, f64, f64, f64)) -> KeyOrValue<Insets>

Converts to this type from the input type.

impl From<(f64, f64, f64, f64)> for KeyOrValue<RoundedRectRadii>

fn from(f: (f64, f64, f64, f64)) -> KeyOrValue<RoundedRectRadii>

Converts to this type from the input type.

impl<T: ValueType> From<Key<T>> for KeyOrValue<T>

fn from(key: Key<T>) -> KeyOrValue<T>

Converts to this type from the input type.

impl<T: Into<Value>> From<T> for KeyOrValue<T>

fn from(value: T) -> KeyOrValue<T>

Converts to this type from the input type.

impl From<f64> for KeyOrValue<Insets>

fn from(f: f64) -> KeyOrValue<Insets>

Converts to this type from the input type.

impl From<f64> for KeyOrValue<RoundedRectRadii>

fn from(f: f64) -> KeyOrValue<RoundedRectRadii>

Converts to this type from the input type.

impl<T> KeyLike<T> for KeyOrValue<T>

fn changed(&self, old: &Env, new: &Env) -> bool

Returns true if this item has changed between the old and new Env.

impl<T: PartialEq> PartialEq<KeyOrValue<T>> for KeyOrValue<T>

fn eq(&self, other: &KeyOrValue<T>) -> 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<T: Eq> Eq for KeyOrValue<T>

impl<T> StructuralEq for KeyOrValue<T>

impl<T> StructuralPartialEq for KeyOrValue<T>