Struct gtk::TypedValue

pub struct TypedValue<T>(_, _);

A statically typed Value.

It dereferences to Value and can be used everywhere Value references are accepted.

See the module documentation for more details.

Methods

impl<'a, T> TypedValue<T> where
    T: FromValueOptional<'a> + SetValue, 

fn get(&'a self) -> Option<T>

Returns the value.

Types that don't support a None value always return Some. See get_some.

fn get_some(&'a self) -> T where
    T: FromValue<'a>, 

Returns the value.

This method is only available for types that don't support a None value.

fn set<U>(&mut self, value: Option<&U>) where
    T: Borrow<U>,
    U: SetValueOptional + ?Sized, 

Sets the value.

This method is only available for types that support a None value.

fn set_none(&mut self) where
    T: SetValueOptional, 

Sets the value to None.

This method is only available for types that support a None value.

fn set_some<U>(&mut self, value: &U) where
    T: Borrow<U>,
    U: SetValue + ?Sized, 

Sets the value.

Methods from Deref<Target = Value>

fn downcast<'a, T>(self) -> Result<TypedValue<T>, Value> where
    T: FromValueOptional<'a> + SetValue, 

Tries to downcast to a TypedValue.

Returns Ok(TypedValue<T>) if the value carries a type corresponding to T and Err(self) otherwise.

fn get<'a, T>(&'a self) -> Option<T> where
    T: FromValueOptional<'a>, 

Tries to get a value of type T.

Returns Some if the type is correct and the value is not None.

This function doesn't distinguish between type mismatches and correctly typed None values. Use downcast or is for that.

fn is<'a, T>(&self) -> bool where
    T: FromValueOptional<'a> + SetValue, 

Returns true if the type of the value corresponds to T.

fn type_(&self) -> Type

Returns the type of the value.

Trait Implementations

impl<T> DerefMut for TypedValue<T>

fn deref_mut(&mut self) -> &mut Value

impl<T> Clone for TypedValue<T>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T> Deref for TypedValue<T>

type Target = Value

fn deref(&self) -> &Value

impl<T> Debug for TypedValue<T>

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

Formats the value using the given formatter.

impl<'a> From<&'a str> for TypedValue<String>

fn from(value: &'a str) -> TypedValue<String>

impl<'a> From<Option<&'a str>> for TypedValue<String>

fn from(value: Option<&'a str>) -> TypedValue<String>

impl<'a, T> From<Option<&'a T>> for TypedValue<T> where
    T: FromValueOptional<'a> + SetValueOptional, 

fn from(value: Option<&'a T>) -> TypedValue<T>

impl<'a, T> From<&'a T> for TypedValue<T> where
    T: FromValueOptional<'a> + SetValue, 

fn from(value: &'a T) -> TypedValue<T>

impl<'a> From<TypedValue<&'a str>> for TypedValue<String>

fn from(value: TypedValue<&str>) -> TypedValue<String>

impl<'a> From<TypedValue<String>> for TypedValue<&'a str>

fn from(value: TypedValue<String>) -> TypedValue<&'a str>