Enum Event 

#[non_exhaustive]
pub enum Event<'a> {
    Input(&'a InputEvent),
    FocusGained,
    FocusLost,
    PressCancelled,
}

Something a widget is asked to react to.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Input(&'a InputEvent)

Raw input, already routed to this widget by hit test or focus.

FocusGained

This widget just took keyboard focus.

FocusLost

This widget just lost keyboard focus.

PressCancelled

A press this widget was holding ended without a release.

The tree drops a held press whenever the thing being pressed stops being reachable — a scene pushed over it, the scene it lives in popped, its node removed or disabled — and no pointer event describes that. A widget that only tracks Down and Up would go on believing a finger is still resting on it, which for anything driving a timer from that belief means waking a panel that nobody is touching.

Ordinary widgets need not handle it: the visual pressed state is cleared by the tree either way.

Trait Implementations

impl<'a> Debug for Event<'a>

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

Formats the value using the given formatter.