Trait SymbolSearch 

pub trait SymbolSearch: MaybeSend + 'static {
    // Required method
    fn search(&self, query: SymbolQuery, reply: Reply<Vec<Instrument>>);
}

Finds instruments for the symbol search dialog, from a source that need not be the feed’s.

The terminal calls search on the UI thread as the user types, and shows the answer to the newest query only. Return at once and answer once through reply, from any thread, runtime or browser task; an answer to a query the user has since changed is ignored, so there is nothing to cancel. The symbol the user picks is loaded from the Datafeed, so answer with symbols as the feed knows them. A fixed list of instruments is a service on its own: see the implementation for Vec<Instrument>.

use egui_charts::data::{FeedError, Reply};
use egui_charts::model::Instrument;
use egui_charts::services::{SymbolQuery, SymbolSearch};

/// Asks a reference-data service from a worker thread.
struct ReferenceData;

impl SymbolSearch for ReferenceData {
    fn search(&self, query: SymbolQuery, reply: Reply<Vec<Instrument>>) {
        std::thread::spawn(move || reply.send(lookup(&query)));
    }
}

/// Stands in for the request to the service.
fn lookup(query: &SymbolQuery) -> Result<Vec<Instrument>, FeedError> {
    let apple = Instrument::new("AAPL")
        .with_description("Apple Inc.")
        .with_exchange("NASDAQ");
    Ok([apple].into_iter().skip(query.offset).take(query.limit).collect())
}

Required Methods

fn search(&self, query: SymbolQuery, reply: Reply<Vec<Instrument>>)

Up to query.limit instruments matching query, best first.

Dyn Compatibility

This trait is dyn compatible.

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

Implementations on Foreign Types

impl SymbolSearch for Vec<Instrument>

A fixed list, answered inline: the instruments whose symbol or description contains the text, ignoring case, and whose type and exchange equal the filters that are set. An instrument whose symbol equals the text comes first, then those whose symbol starts with it, then the rest, each group in list order.

fn search(&self, query: SymbolQuery, reply: Reply<Vec<Instrument>>)

Implementors

impl SymbolSearch for HttpDatafeed

Available on crate feature http only.