Module capability 

Capabilities: behaviour a widget takes part in beyond pixels and input.

A layer above the toolkit (collaboration, history, fullscreen, native views, …) defines a capability as a trait and reaches a widget’s implementation through capability / capability_mut. A widget declares what it provides in one line inside its impl Widget:

impl Widget for Player {
    tilo_ui::provides!(dyn FullscreenProvider, dyn Continuable);
    // ...
}

A widget that provides nothing needs nothing: the Widget defaults answer every request with None. A wrapper passes requests to the widget it wraps by calling its provide/provide_mut.

Structs

Request

A shared-borrow request for one capability, answered by Widget::provide.

RequestMut

An exclusive-borrow request for one capability, answered by Widget::provide_mut.

Functions

capability

widget’s implementation of capability T (a dyn Trait), if it provides one.

capability_mut

Mutable capability.