@neo4j-ndl/react
Version:
React implementation of Neo4j Design System
69 lines • 2.95 kB
JavaScript
import { jsx as _jsx } from "react/jsx-runtime";
/**
*
* 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 React, { cloneElement, useCallback, useMemo, useRef, useState, } from 'react';
export const ButtonGroup = ({ children }) => {
const [selectedIndex, setSelectedIndex] = useState(0);
const parentRef = useRef(null);
const focusElement = (index) => {
var _a, _b;
const child = (_b = (_a = parentRef.current) === null || _a === void 0 ? void 0 : _a.children[index]) === null || _b === void 0 ? void 0 : _b.children[0];
if (child instanceof HTMLElement) {
child.focus();
}
};
const childrenCount = useMemo(() => React.Children.count(children), [children]);
const safeSetSelectedIndex = useCallback((index) => {
if (index >= childrenCount) {
setSelectedIndex(childrenCount - 1);
}
else {
setSelectedIndex(Math.max(0, index));
}
}, [childrenCount, setSelectedIndex]);
const handleKeyDown = (event) => {
let newIndx = selectedIndex;
if (event.key === 'ArrowRight' || event.key === 'ArrowDown') {
newIndx = (selectedIndex + 1) % React.Children.count(children);
safeSetSelectedIndex(newIndx);
}
else if (event.key === 'ArrowLeft' || event.key === 'ArrowUp') {
newIndx =
(selectedIndex - 1 + React.Children.count(children)) %
React.Children.count(children);
safeSetSelectedIndex(newIndx);
}
// set focus to new button
focusElement(newIndx);
};
return (
// eslint-disable-next-line jsx-a11y/no-noninteractive-element-interactions
_jsx("ul", { onKeyDown: (e) => handleKeyDown(e), ref: parentRef, style: { all: 'inherit', listStyleType: 'none' }, children: React.Children.map(children, (child, index) => {
if (!React.isValidElement(child)) {
return null;
}
const clonedElement = cloneElement(child, {
tabIndex: selectedIndex === index ? 0 : -1,
});
return _jsx("li", { children: clonedElement }, index);
}) }));
};
//# sourceMappingURL=button-group.js.map