Trait vizia::context::DataContext

pub trait DataContext {
    // Required method
    fn data<T>(&self) -> Option<&T>
       where T: 'static;

    // Provided method
    fn as_context(&self) -> Option<LocalizationContext<'_>> { ... }
}

A trait for any Context-like object that lets you access stored model data.

This lets e.g Lens::get be generic over any of these types.

Required Methods

fn data<T>(&self) -> Option<&T>

where T: 'static,

Get model/view data from the context. Returns None if the data does not exist.

Provided Methods

fn as_context(&self) -> Option<LocalizationContext<'_>>

Object Safety

This trait is not object safe.

Implementors

impl DataContext for Context

impl<'a> DataContext for DrawContext<'a>

impl<'a> DataContext for EventContext<'a>

impl<'a> DataContext for LocalizationContext<'a>

impl<'a, V> DataContext for Handle<'a, V>