Struct ChoiceCore 

pub struct ChoiceCore<T>
where
    T: PartialEq + Clone + Default,
{ /* private fields */ }

Implementations

impl<T> ChoiceCore<T>

where T: PartialEq + Clone + Default,

pub fn set_values(&mut self, values: Vec<T>)

pub fn values(&self) -> &[T]

List of values.

pub fn set_default_value(&mut self, default_value: Option<T>)

Set a default-value other than T::default()

The starting value will still be T::default() after this. You must call clear() to use this default.

pub fn default_value(&self) -> &Option<T>

A default value.

pub fn selected(&self) -> Option<usize>

Selected item index.

This may be None and there may still be a valid value. This can happen if a value is not in the value-list, or if the value-list is empty before the first render.

Use of value() is preferred.

pub fn set_selected(&mut self, select: usize) -> bool

Set the selected item by index.

If the select-idx doesn’t match the list of values, selected will be None. This may happen before the first render, while values is still empty.

Use of set_value() is preferred.

pub fn set_value(&mut self, value: T) -> bool

Set the value for this Choice.

The value will be retained even if it is not in the value-list. This can happen before the first render while the value-list is still empty. Or because a divergent value is set here.

The starting value will be T::default().

pub fn value(&self) -> T

Return the selected value, or any value set with set_value()

pub fn is_empty(&self) -> bool

pub fn clear(&mut self) -> bool

Trait Implementations

impl<T> Clone for ChoiceCore<T>

where T: PartialEq + Clone + Default + Clone,

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T> Debug for ChoiceCore<T>

where T: PartialEq + Clone + Default + Debug,

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

Formats the value using the given formatter.

impl<T> Default for ChoiceCore<T>

where T: PartialEq + Clone + Default + Default,

fn default() -> ChoiceCore<T>

Returns the “default value” for a type.