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| import React, { useEffect, useState,useRef } from 'react';
| import ReactDOM from 'react-dom';
| import { data } from './data';
| import G6 from '@antv/g6';
| import "./index.css"
| import { Modal, Input } from 'antd';
|
| export default function() {
| const ref = useRef(null);
| const graphRef = useRef(null);
|
| useEffect(() => {
| if (!graphRef.current) {
| // // 注册自定义行为
| // G6.registerBehavior('drag-line', {
| // getEvents() {
| // return {
| // 'edge:mousedown': 'onDragStart',
| // 'canvas:mousemove': 'onDrag',
| // 'canvas:mouseup': 'onDragEnd',
| // }
| // },
| // onDragStart(ev) {
| // const edge = ev.item;
| // this.edge = edge;
| // this.dragging = true;
| // console.log(ev)
| // },
| // onDrag(ev) {
| // if (!this.dragging) {
| // return;
| // }
| // const { x, y } = ev;
|
| // // 更新边的 target（终点）
| // this.edge.update({
| // target: { x, y },
| // });
| // },
| // onDragEnd() {
| // this.edge = null;
| // this.dragging = false;
| // }
| // });
|
| G6.registerBehavior('click-add-edge', {
| getEvents() {
| return {
| 'node:click': 'onClick',
| mousemove: 'onMousemove',
| 'edge:click': 'onEdgeClick' // 点击空白处，取消边
| };
| },
| onClick(ev) {
| const node = ev.item;
| const graph = this.graph;
| const point = {
| x: ev.x,
| y: ev.y
| };
| const model = node.getModel();
| if (this.addingEdge && this.edge) {
| graph.updateItem(this.edge, {
| target: model.id
| });
| // graph.setItemState(this.edge, 'selected', true);
| this.edge = null;
| this.addingEdge = false;
| } else {
| this.edge = graph.addItem('edge', {
| source: model.id,
| target: point
| });
| this.addingEdge = true;
| }
| },
| onMousemove(ev) {
| const point = {
| x: ev.x,
| y: ev.y
| };
| if (this.addingEdge && this.edge) {
| this.graph.updateItem(this.edge, {
| target: point
| });
| }
| },
| onEdgeClick(ev) {
| const currentEdge = ev.item;
| // 拖拽过程中，点击会点击到新增的边上
| if (this.addingEdge && this.edge == currentEdge) {
| graph.removeItem(this.edge);
| this.edge = null;
| this.addingEdge = false;
| }
| }
| });
|
|
| graphRef.current = new G6.Graph({
| container: ReactDOM.findDOMNode(ref.current),
| width: document.documentElement.clientWidth,
| height: document.documentElement.clientHeight,
| modes: {
| default: [
| 'drag-canvas',
| 'zoom-canvas',
| 'drag-node',
| 'drag-line',
| 'click-add-edge'
| ],
| addEdge: ['click-add-edge', 'click-select']
| },
| layout: {
| type: 'dagre',
| direction: 'LR',
| },
| defaultNode: {
| shape: 'node',
| type: 'rect',
| labelCfg: {
| style: {
| fill: '#000000A6',
| fontSize: 14,
| },
| },
| style: {
| // 仅在 keyShape 上生效
| fill: 'lightblue',
| stroke: '#888',
| lineWidth: 1,
| radius: 7,
| },
| // linkPoints: {
| // top: true,
| // bottom: true,
| // left: true,
| // right: true,
| // // ... 四个圆的样式可以在这里指定
| // },
| },
| defaultEdge: {
| shape: 'polyline',
| },
| nodeStateStyles: {
| // 各状态下的样式，平铺的配置项仅在 keyShape 上生效。需要在其他 shape 样式上响应状态变化则写法不同，参见上文提到的 配置状态样式 链接
| hover: {
| fillOpacity: 0.1,
| lineWidth: 1,
| },
| },
| });
| }
|
| const graph = graphRef.current;
|
| graph.data(data);
| graph.render();
|
| graph.setMode("edit")
|
| // 监听鼠标进入节点事件
| graph.on('node:mouseenter', (evt) => {
| const node = evt.item;
| // 激活该节点的 hover 状态
| graph.setItemState(node, 'hover', true);
| });
|
| // 监听鼠标离开节点事件
| graph.on('node:mouseleave', (evt) => {
| const node = evt.item;
| // 关闭该节点的 hover 状态
| graph.setItemState(node, 'hover', false);
| });
|
| graph.on('node:dblclick', (evt) => {
| const node = evt.item;
| const model = node.getModel();
| // 在此处执行显示一个模态框或输入框的操作，将model.id传入用来确定哪个节点，model.label传入用来显示当前节点文字
| showModal(model.id, model.label);
| });
|
| // 添加行为
| graph.on('edge:click', (evt) => {
| const { item } = evt;
|
| // 获取边的模型数据
| const model = item.getModel();
|
| // 切换选中状态
| if (model.style?.stroke === '#f00') {
| // 如果边处于选中状态，则取消选中
| graph.updateItem(item, {
| style: {
| ...model.style,
| stroke: '#000',
| },
| });
| } else {
| // 如果边未被选中，则选中当前边
| graph.updateItem(item, {
| style: {
| ...model.style,
| stroke: '#f00',
| },
| });
| }
| });
| }, []);
|
| const [modalVisible, setModalVisible] = useState(false);
| const [currentNode, setCurrentNode] = useState(null);
| const [currentLabel, setCurrentLabel] = useState('');
|
| const showModal = (id, label) => {
| setCurrentNode(id); // 设置当前节点
| setCurrentLabel(label); // 设置当前节点文字
| setModalVisible(true); // 打开模态框
| };
|
| const updateLabel = (nodeId, newLabel) => {
| if(graphRef.current){
| const node = graphRef.current.findById(nodeId);
| graphRef.current.update(node, {
| label: newLabel,
| });
| graphRef.current.refresh();
| }
| };
|
| const handleOk = () => {
| // 点击确定后更新节点
| updateLabel(currentNode, currentLabel);
| setModalVisible(false);
| };
|
| const handleCancel = () => {
| // 关闭模态框
| setModalVisible(false);
| };
|
| return (
| <>
| <div ref={ref} /> {/* g6图表的容器 */}
| <Modal
| open={modalVisible}
| onOk={handleOk}
| onCancel={handleCancel}
| >
| <div className='modalInput'>
| <Input value={currentLabel} onChange={e => setCurrentLabel(e.target.value)} />
| </div>
| </Modal>
| </>
| );
| }
|
|
