Trait Quotes 

pub trait Quotes: MaybeSend + 'static {
    // Required method
    fn subscribe(&self, symbols: &[String], events: Events<(String, Quote)>);
}

The host’s quote stream. The watchlist subscribes to the symbols of its active list and the chart’s symbol, and hands the chart symbol’s quote to the symbol details panel, the symbol header and the order ticket.

Methods are called on the UI thread and must return at once. Push from any thread, runtime or browser task.

use egui_charts::model::Quote;
use egui_charts::services::{Events, Quotes};
use std::time::Duration;

/// Pushes every symbol at 100 once a second, in place of a host's market data.
struct Flat;

impl Quotes for Flat {
    fn subscribe(&self, symbols: &[String], events: Events<(String, Quote)>) {
        let symbols = symbols.to_vec();
        std::thread::spawn(move || {
            while events.is_active() {
                for symbol in &symbols {
                    let quote = Quote::new(100.0, 99.0, chrono::Utc::now()).with_volume(1e6);
                    events.push((symbol.clone(), quote));
                }
                std::thread::sleep(Duration::from_secs(1));
            }
        });
    }
}

Required Methods

fn subscribe(&self, symbols: &[String], events: Events<(String, Quote)>)

Starts pushing the quotes of symbols into events, each with its symbol, until the stream is inactive: that is the unsubscription, so stop then. Push the current quote of each symbol first, since a subscription starts from none. The watchlist subscribes again, with a new stream, whenever its symbols change and after the stream lagged, and stops the old one.

The stream takes at most 10,000 pushes between two frames: coalesce the updates of a symbol rather than pushing each tick.

Dyn Compatibility

This trait is dyn compatible.

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

Implementors