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Merge pull request #2148 from dprokop/dprokop/multi-grid-react
Demo - multiple react grids example
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‎demo/index.html‎

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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>Demo</title>
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</head>
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<body>
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<h1>Demos</h1>
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<ul>
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<li><a href="nested_advanced.html">Nested Advanced grids</a></li>
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<li><a href="offset.html">Offset parent</a></li>
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<li><a href="react-hooks.html">ReactJS (Hooks)</a></li>
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<li><a href="react-hooks-controlled-multiple.html">ReactJS (Hooks), mulitple, controlled</a></li>
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<li><a href="react.html">ReactJS</a></li>
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<li><a href="responsive.html">Responsive</a></li>
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<li><a href="right-to-left(rtl).html">Right-To-Left (RTL)</a></li>
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<li><a href="old_nested-jq.html">Nested grids</a></li>
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</ul>
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</body>
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</html>
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</html>

‎demo/react-hooks-controlled-multiple.html‎

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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>Gridstack.js React integration example</title>
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<link rel="stylesheet" href="demo.css" />
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<script src="../dist/gridstack-all.js"></script>
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<!-- Scripts to use react inside html -->
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<script src="https://unpkg.com/react@16/umd/react.production.min.js"></script>
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<script src="https://unpkg.com/react-dom@16/umd/react-dom.production.min.js"></script>
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<script src="https://unpkg.com/babel-standalone@6.15.0/babel.min.js"></script>
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</head>
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<body>
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<div>
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<h2>Controlled stack</h2>
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<div id="controlled-stack"></div>
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</div>
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</body>
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<script type="text/babel">
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const { useState, useEffect, useLayoutEffect, createRef, useRef } = React
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const Item = ({ id }) => <div>I am item: {id}</div>
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//
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// Controlled example
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//
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const ControlledStack = ({ items, addItem, removeItem, id }) => {
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const refs = useRef({})
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const gridRef = useRef()
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refs.current = {}
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if (Object.keys(refs.current).length !== items.length) {
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items.forEach(({ id }) => {
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refs.current[id] = refs.current[id] || createRef()
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})
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}
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useLayoutEffect(() => {
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gridRef.current =
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// gridRef.current ||
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GridStack.init(
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{
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float: true,
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acceptWidgets: true,
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},
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`.controlled-${id}`
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)
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const grid = gridRef.current
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grid.on('removed', (e, el) => {
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const elId = Array.isArray(el) ? el[el.length - 1].id : el.id;
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removeItem(elId.split(':')[1])
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})
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grid.on('dropped', (e, p, n) => {
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console.log('dropped', p, n)
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// Remove "placeholder" item
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// Gridstack creates a DOM element for dropped items, those need to be removed
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// as they are rendered by React
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grid.getGridItems().forEach((item) => {
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const ids = item.getAttribute('gs-id').split(':')
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if (ids[0] !== id) {
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grid.removeWidget(item, true, false);
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}
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});
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addItem({ id: n.id.split(':')[1], x: n.x, y: n.y, w: n.w, h: n.h })
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})
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grid.batchUpdate()
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items.forEach((a) => {
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// remove existing widgets
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if (refs.current[a.id] && refs.current[a.id].current) {
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grid.removeWidget(refs.current[a.id].current, false, false)
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}
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grid.makeWidget(refs.current[a.id].current)
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})
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grid.batchUpdate(false)
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}, [items])
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useEffect(() => {
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return () => {
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// console.log('cleanup', id)
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// gridRef.current.destroy(false, false)
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// gridRef.current = null
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}
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})
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return (
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<div style={{ width: '100%' }}>
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<div className={`grid-stack controlled-${id}`}>
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{items.map((item, i) => {
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// console.log('render', id, item.id)
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return (
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<div ref={refs.current[item.id]} key={`${id}-${item.id}`} className={'grid-stack-item'} gs-id={`${id}:${item.id}`} gs-w={item.w} gs-h={item.h} gs-x={item.x} gs-y={item.y}>
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<div className="grid-stack-item-content">
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<Item {...item} />
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</div>
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</div>
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)
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})}
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</div>
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<code>
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<pre>{JSON.stringify(items, null, 2)}</pre>
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</code>
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</div>
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)
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}
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const ControlledExample = () => {
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const [items1, setItems1] = useState([{ id: 'item-1-1', x: 0, y: 0, w: 2, h: 2 }, { id: 'item-1-2', x: 2, y: 0, w: 2, h: 2 }])
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const [items2, setItems2] = useState([{ id: 'item-2-1', x: 0, y: 0, w: 1, h: 1 }, { id: 'item-2-2', x: 0, y: 1, w: 1, h: 1 }, { id: 'item-2-3', x: 1, y: 0, w: 1, h: 1 }])
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return (
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<div style={{
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display: 'flex'
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}}>
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<div style={{ display: 'flex', width: '50%' }}>
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<ControlledStack
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id='gs1'
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items={items1}
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addItem={(item) => {
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setItems1([...items1, item])
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}}
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removeItem={(id) => {
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setItems1(items1.filter(i => i.id !== id))
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}}
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/>
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</div >
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<div style={{ display: 'flex', width: '50%' }}>
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<ControlledStack
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id='gs2'
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items={items2}
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addItem={(item) => {
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setItems2([...items2, item])
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}}
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removeItem={(id) => {
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setItems2(items2.filter(i => i.id !== id))
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}}
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/>
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</div>
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</div >
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)
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}
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ReactDOM.render(<ControlledExample />, document.getElementById('controlled-stack'))
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</script>
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</html>

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