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/**
* Relabi generator UI
* @module src/ui/App.js;
*/
import * as React from "react";
import { useState, useEffect, useRef } from "react";
import Relabi from "../relabi";
import { Kalimba, Drums } from "../lib/instruments";
import Controls from "./Controls.jsx";
export default function App() {
const [relabi, setRelabi] = useState();
const relabiRef = useRef();
/**
* Instantiate the Relabi generator
*/
useEffect(() => {
if (!relabi) {
const relabiGenerator = new Relabi({
waves: [
{ shape: "sine", frequency: 0.75 },
{ shape: "sine", frequency: 1.0 },
{ shape: "sine", frequency: 1.617 },
{ shape: "sine", frequency: 3.141 },
],
bounds: [
{
level: -0.75,
color: "#f33",
sounds: [
{ instrument: Drums, index: 0 },
{ instrument: Drums, index: 1 },
],
},
{
level: 0.75,
color: "#f83",
sounds: [
{ instrument: Drums, index: 2 },
{ instrument: Drums, index: 3 },
],
},
{
level: -0.25,
color: "#3b8",
sounds: [
{ instrument: Kalimba, frequency: 440 },
{ instrument: Kalimba, frequency: (440 * 3) / 2 },
],
},
{
level: 0.25,
color: "#36f",
sounds: [
{ instrument: Kalimba, frequency: (440 * 6) / 5 },
{ instrument: Kalimba, frequency: (440 * 6) / 7 },
],
},
],
});
relabiGenerator.start();
setRelabi(relabiGenerator);
}
}, [relabi]);
useEffect(() => {
if (relabi && relabiRef.current) {
relabi.canvas.appendCanvas(relabiRef.current);
}
}, [relabi, relabiRef.current]);
/**
* Render
*/
return (
<div
style={{
height: "100%",
width: "100%",
padding: 0,
margin: 0,
display: "flex",
flexDirection: "column",
justifyContent: "center",
}}
>
<div ref={relabiRef} />
<Controls relabi={relabi} />
</div>
);
}
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