@neo4j-ndl/react-charts
Version:
React implementation of charts from Neo4j Design System
48 lines • 1.85 kB
JavaScript
/**
*
* Copyright (c) "Neo4j"
* Neo4j Sweden AB [http://neo4j.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import { createContext, createElement, useContext, useMemo, useRef, } from 'react';
const ChartRefsContext = createContext(undefined);
/**
* Creates the mutable refs shared between `ChartRender` and legend components.
*
* `chartEchartRef` points at the ECharts host element, while the legend refs act
* as a bridge for state that ECharts needs synchronously during option rebuilds
* without forcing extra React renders.
*/
export function ChartRefsProvider({ children }) {
const chartEchartRef = useRef(null);
const legendSelectedRef = useRef({});
const legendColorCacheRef = useRef(new Map());
const refs = useMemo(() => ({
chartEchartRef,
legendColorCacheRef,
legendSelectedRef,
}), []);
return createElement(ChartRefsContext.Provider, { value: refs }, children);
}
export function useChartRefsContext() {
const refs = useContext(ChartRefsContext);
if (refs === undefined) {
throw new Error('useChartRefsContext must be used within ChartRefsProvider');
}
return refs;
}
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