Trait ReadGlobal 

pub trait ReadGlobal {
    // Required method
    fn global(cx: &App) -> &Self;
}

Reads the global of the implementing type from an App, as in Theme::global(cx).

Every Global type implements this trait. Use it to name a global by type instead of calling App::global with a turbofish.

Examples

struct Theme {
    dark: bool,
}

impl Global for Theme {}

app.set_global(Theme { dark: true });
assert!(app.read(|cx| Theme::global(cx).dark));

Required Methods

fn global(cx: &App) -> &Self

Returns the global of this type.

Panics

Panics if no global of this type has been set.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<T: Global> ReadGlobal for T