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e7aa014c31
* docs: init * chore: all types * docs: faq * chore: fix lint
112 lines
2.9 KiB
TypeScript
112 lines
2.9 KiB
TypeScript
import React, { useState } from 'react';
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import { Tree } from 'antd';
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import type { TreeDataNode, TreeProps } from 'antd';
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const x = 3;
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const y = 2;
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const z = 1;
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const defaultData: TreeDataNode[] = [];
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const generateData = (_level: number, _preKey?: React.Key, _tns?: TreeDataNode[]) => {
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const preKey = _preKey || '0';
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const tns = _tns || defaultData;
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const children: React.Key[] = [];
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for (let i = 0; i < x; i++) {
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const key = `${preKey}-${i}`;
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tns.push({ title: key, key });
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if (i < y) {
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children.push(key);
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}
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}
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if (_level < 0) {
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return tns;
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}
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const level = _level - 1;
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children.forEach((key, index) => {
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tns[index].children = [];
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return generateData(level, key, tns[index].children);
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});
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};
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generateData(z);
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const App: React.FC = () => {
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const [gData, setGData] = useState(defaultData);
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const [expandedKeys] = useState(['0-0', '0-0-0', '0-0-0-0']);
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const onDragEnter: TreeProps['onDragEnter'] = (info) => {
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console.log(info);
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// expandedKeys, set it when controlled is needed
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// setExpandedKeys(info.expandedKeys)
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};
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const onDrop: TreeProps['onDrop'] = (info) => {
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console.log(info);
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const dropKey = info.node.key;
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const dragKey = info.dragNode.key;
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const dropPos = info.node.pos.split('-');
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const dropPosition = info.dropPosition - Number(dropPos[dropPos.length - 1]); // the drop position relative to the drop node, inside 0, top -1, bottom 1
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const loop = (
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data: TreeDataNode[],
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key: React.Key,
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callback: (node: TreeDataNode, i: number, data: TreeDataNode[]) => void,
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) => {
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for (let i = 0; i < data.length; i++) {
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if (data[i].key === key) {
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return callback(data[i], i, data);
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}
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if (data[i].children) {
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loop(data[i].children!, key, callback);
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}
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}
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};
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const data = [...gData];
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// Find dragObject
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let dragObj: TreeDataNode;
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loop(data, dragKey, (item, index, arr) => {
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arr.splice(index, 1);
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dragObj = item;
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});
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if (!info.dropToGap) {
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// Drop on the content
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loop(data, dropKey, (item) => {
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item.children = item.children || [];
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// where to insert. New item was inserted to the start of the array in this example, but can be anywhere
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item.children.unshift(dragObj);
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});
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} else {
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let ar: TreeDataNode[] = [];
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let i: number;
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loop(data, dropKey, (_item, index, arr) => {
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ar = arr;
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i = index;
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});
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if (dropPosition === -1) {
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// Drop on the top of the drop node
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ar.splice(i!, 0, dragObj!);
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} else {
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// Drop on the bottom of the drop node
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ar.splice(i! + 1, 0, dragObj!);
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}
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}
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setGData(data);
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};
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return (
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<Tree
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className="draggable-tree"
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defaultExpandedKeys={expandedKeys}
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draggable
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blockNode
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onDragEnter={onDragEnter}
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onDrop={onDrop}
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treeData={gData}
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/>
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);
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};
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export default App;
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