ant-design/components/tabs/demo/custom-tab-bar-node.md

order	title
13	zh-CN en-US 可拖拽标签 Draggable Tabs

zh-CN

使用 react-dnd 实现标签可拖拽。

en-US

Use react-dnd to make tabs draggable.

import { Tabs } from 'antd';
import { DragDropContextProvider, DragSource, DropTarget } from 'react-dnd';
import HTML5Backend from 'react-dnd-html5-backend';

const TabPane = Tabs.TabPane;

// Drag & Drop node
class TabNode extends React.Component {
  render() {
		const {
			connectDragSource,
      connectDropTarget,
      children,
		} = this.props

		return connectDragSource(
			connectDropTarget(children),
    );
	}
}

const cardTarget = {
  drop(props, monitor) {
    const dragKey = monitor.getItem().index;
    const hoverKey = props.index;

    if (dragKey === hoverKey) {
      return;
    }

    props.moveTabNode(dragKey, hoverKey);
    monitor.getItem().index = hoverKey;
  },
};

const cardSource = {
	beginDrag(props) {
		return {
			id: props.id,
			index: props.index,
		}
	},
};

const WrapTabNode = DropTarget(
	'DND_NODE',
	cardTarget,
	(connect) => ({
		connectDropTarget: connect.dropTarget(),
	}),
)(
	DragSource(
		'DND_NODE',
		cardSource,
		(connect, monitor) => ({
			connectDragSource: connect.dragSource(),
			isDragging: monitor.isDragging(),
		}),
	)(TabNode),
);

class DraggableTabs extends React.Component {
  state = {
    order: [],
  };

  moveTabNode = (dragKey, hoverKey) => {
    const newOrder = this.state.order.slice();
    const { children } = this.props;

    React.Children.forEach(children, (c) => {
      if (newOrder.indexOf(c.key) === -1) {
        newOrder.push(c.key);
      }
    });

    const dragIndex = newOrder.indexOf(dragKey);
    const hoverIndex = newOrder.indexOf(hoverKey);

    newOrder.splice(dragIndex, 1);
    newOrder.splice(hoverIndex, 0, dragKey);

    this.setState({
      order: newOrder,
    });
  };

  renderTabBar = (props, DefaultTabBar) => (
    <DefaultTabBar {...props}>
      {node => (
        <WrapTabNode key={node.key} index={node.key} moveTabNode={this.moveTabNode}>{node}</WrapTabNode>
      )}
    </DefaultTabBar>
  );

  render() {
    const { order } = this.state;
    const { children } = this.props;

    const tabs = [];
    React.Children.forEach(children, (c) => {
      tabs.push(c);
    });

    const orderTabs = tabs.slice().sort((a, b) => {
      const orderA = order.indexOf(a.key);
      const orderB = order.indexOf(b.key);

      if (orderA !== -1 && orderB !== -1) {
        return orderA - orderB;
      }
      if (orderA !== -1) {
        return -1;
      }
      if (orderB !== -1) {
        return 1;
      }

      const ia = tabs.indexOf(a);
      const ib = tabs.indexOf(b);

      return ia - ib;
    });

    return (
      <DragDropContextProvider backend={HTML5Backend}>
        <Tabs
          renderTabBar={this.renderTabBar}
          {...this.props}
        >
          {orderTabs}
        </Tabs>
      </DragDropContextProvider>
    );
  }
}

ReactDOM.render(
  <DraggableTabs>
    <TabPane tab="tab 1" key="1">
      Content of Tab Pane 1
    </TabPane>
    <TabPane tab="tab 2" key="2">
      Content of Tab Pane 2
    </TabPane>
    <TabPane tab="tab 3" key="3">
      Content of Tab Pane 3
    </TabPane>
  </DraggableTabs>
, mountNode);