Struct ButtonState 

pub struct ButtonState<'a> {
    pub engine: &'a EngineState,
    pub ecad: Option<&'a Editors>,
}

What a button’s predicates read: the document’s engine and, for the eCAD workbenches, the document’s eCAD editors.

The editors are not engine state — they are egui widgets the app keeps per document (ecad::Editors) — so a predicate that only took the engine could not say whether eCAD’s wire tool is armed, and an eCAD button would have to be offered unconditionally and refused at dispatch instead: a row drawing unavailable buttons as available. ecad is None where a document has no editors, and then every eCAD button reads NOT offered.

Fields

engine: &'a EngineState

ecad: Option<&'a Editors>

Implementations

impl<'a> ButtonState<'a>

pub fn of(engine: &'a EngineState) -> Self

The engine alone: every button but the eCAD workbenches’ can answer.

pub fn with_ecad(engine: &'a EngineState, ecad: &'a Editors) -> Self

The engine and the document’s eCAD editors.

Trait Implementations

impl<'a> Clone for ButtonState<'a>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Copy for ButtonState<'a>