2020-11-29 14:15:08 +08:00
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---
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order: 98
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title:
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zh-CN: Drag Debug
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en-US: Drag Debug
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debug: true
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---
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```jsx
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import { Tree, Switch } from 'antd';
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import { CarryOutOutlined } from '@ant-design/icons';
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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 gData = [];
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const generateData = (_level, _preKey, _tns) => {
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const preKey = _preKey || '0';
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const tns = _tns || gData;
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const children = [];
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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, icon: <CarryOutOutlined /> });
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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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class Demo extends React.Component {
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state = {
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gData,
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expandedKeys: ['0-0', '0-0-0', '0-0-0-0'],
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showLine: true,
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showIcon: true,
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showLeafIcon: true,
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};
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onDragEnter = info => {
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console.log(info);
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// expandedKeys 需要受控时设置
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// this.setState({
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// expandedKeys: info.expandedKeys,
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// });
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};
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onDrop = info => {
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console.log(info);
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2021-01-08 10:14:01 +08:00
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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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2020-11-29 14:15:08 +08:00
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const dropPosition = info.dropPosition - Number(dropPos[dropPos.length - 1]);
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const loop = (data, key, callback) => {
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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 = [...this.state.gData];
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// Find dragObject
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let dragObj;
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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 示例添加到尾部,可以是随意位置
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item.children.push(dragObj);
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});
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} else if (
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(info.node.props.children || []).length > 0 && // Has children
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info.node.props.expanded && // Is expanded
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dropPosition === 1 // On the bottom gap
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) {
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loop(data, dropKey, item => {
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item.children = item.children || [];
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// where to insert 示例添加到头部,可以是随意位置
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item.children.unshift(dragObj);
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});
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} else {
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let ar;
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let i;
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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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ar.splice(i, 0, dragObj);
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} else {
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ar.splice(i + 1, 0, dragObj);
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}
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}
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this.setState({
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gData: data,
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});
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};
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setShowLine = showLine => {
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const { showLeafIcon } = this.state;
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if (showLine) {
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if (showLeafIcon) {
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this.setState({
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showLine: {
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showLeafIcon: true,
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},
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});
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} else {
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this.setState({
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showLine: true,
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});
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}
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} else {
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this.setState({
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showLine: false,
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});
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}
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};
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setShowIcon = showIcon => {
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this.setState({
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showIcon,
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});
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};
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setShowLeafIcon = showLeafIcon => {
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this.setState({
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showLeafIcon,
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showLine: { showLeafIcon },
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});
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};
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render() {
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const { showLine, showIcon, showLeafIcon, expandedKeys } = this.state;
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const { setShowLine, setShowIcon, setShowLeafIcon } = this;
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return (
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<>
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<div style={{ marginBottom: 16 }}>
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showLine: <Switch checked={showLine} onChange={setShowLine} />
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<br />
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<br />
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showIcon: <Switch checked={showIcon} onChange={setShowIcon} />
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<br />
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<br />
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showLeafIcon: <Switch checked={showLeafIcon} onChange={setShowLeafIcon} />
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</div>
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<Tree
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showLine={showLine}
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showIcon={showIcon}
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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={this.onDragEnter}
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onDrop={this.onDrop}
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treeData={this.state.gData}
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/>
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</>
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);
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}
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}
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2022-04-15 16:20:56 +08:00
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export default Demo;
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2020-11-29 14:15:08 +08:00
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```
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