Struct Menu 

pub struct Menu { /* private fields */ }

The actions for one ActionTarget, as a component (#474): an ActionMenu to show in a modal. The arrows move, Enter or an action’s own key runs one (the menu answers it), Escape or the key that opened it cancels. Select opens one over the focused item; Overlays opens one for a region.

Implementations

impl Menu

pub fn new(actions: Vec<Action>, target: ActionTarget) -> Menu

pub fn key(self, key: Key) -> Self

The key that opened it, which closes it again (default Ctrl+K).

pub fn theme(self, theme: Theme) -> Self

pub fn target(&self) -> &ActionTarget

pub fn menu(&self) -> &ActionMenu

pub fn size(&self) -> (usize, usize)

The size of a box that shows it all, border included.

Trait Implementations

impl Component for Menu

type Output = Action

fn handle(&mut self, event: &Event, _: &Context<'_>) -> Flow<Action>

Handle one event. Ctrl+C never arrives here: the event loop ends the component with Outcome::Interrupted.

fn render(&self, context: &Context<'_>) -> View

Render the current state.

fn mouse(&self) -> bool

Whether the component wants mouse events (#476): clicks, drags and the wheel. Off by default, since reporting the mouse takes text selection away from the terminal; a component turns it on when its caller opts in, and run then enables mouse reporting for the session.

fn keymap(&self) -> Keymap

The bindings this component has right now, for a help overlay, a shortcut list or status-bar hints to read (see keymap). A container’s include its focused child’s, before its own. The default declares none.

fn start(&mut self, context: &Context<'_>) -> Flow<Self::Output>

Called once, before the component is first painted, with the terminal’s size: for work that needs it, such as rendering content at the width. Returning Done or Cancel finishes the component without waiting for an event. The default does nothing.

fn tick(&self) -> Option<Duration>

How often the component wants Event::Tick, for a spinner or a countdown. None (the default): never.

fn focusable(&self) -> bool

Whether the component takes focus in a container: Tab stops on it and keys go to it. The default: yes. A label, or a component that has finished, says no.

fn focus_step(&mut self, forward: bool) -> bool

Move focus to the next (forward) or previous focus stop inside this component, for Tab and Shift+Tab. false when there is none after the current one, so the container moves on to its next child. The default, for a component that is one stop: false.

fn focus_enter(&mut self, forward: bool) -> bool

Take focus from outside: at the first stop inside when forward, at the last otherwise. false when nothing in it can take focus. The default: whether the component is focusable.

fn default_value(&self) -> Option<Self::Output>

The value to return when the terminal is not interactive and the policy asks for defaults. None: there is none.

fn prompt( &mut self, io: &mut dyn LineIo, ) -> Result<Option<Self::Output>, NotInteractive>

Ask for the value line by line, for when the terminal is not interactive and the policy asks for a prompt. The default says the component has no line-based form.