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import React, { useState, useCallback, useRef, useEffect } from 'react';
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import {
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ReactFlow,
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applyNodeChanges,
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applyEdgeChanges,
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addEdge,
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reconnectEdge,
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Background,
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Controls,
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Node,
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Edge,
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ReactFlowProvider,
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useReactFlow,
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EdgeTypes,
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SelectionMode,
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useStoreApi,
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Panel
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} from '@xyflow/react';
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import '@xyflow/react/dist/style.css';
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import { nodeTypeMap, nodeTypes, registerNodeType } from './node';
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import SideBar from './sideBar/sideBar';
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import { convertFlowData } from '@/utils/convertFlowData';
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import { exampleFlowData } from '@/pages/flowEditor/test/exampleFlowData';
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import LocalNode from '@/pages/flowEditor/node/localNode/LocalNode';
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import CustomEdge from './components/customEdge';
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import NodeContextMenu from './components/nodeContextMenu';
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import EdgeContextMenu from './components/edgeContextMenu';
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import NodeEditModal from './components/nodeEditModal';
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const edgeTypes: EdgeTypes = {
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custom: CustomEdge
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};
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const FlowEditorWithProvider: React.FC = () => {
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return (
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<div style={{ width: '100%', height: '91vh', display: 'flex' }}>
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<ReactFlowProvider>
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<SideBar />
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<FlowEditor />
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</ReactFlowProvider>
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</div>
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);
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};
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const FlowEditor: React.FC = () => {
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const [nodes, setNodes] = useState<Node[]>([]);
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const [edges, setEdges] = useState<Edge[]>([]);
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const reactFlowInstance = useReactFlow();
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const reactFlowWrapper = useRef<HTMLDivElement>(null);
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const [menu, setMenu] = useState<{
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id: string;
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type: 'node' | 'edge';
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top: number;
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left: number;
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} | null>(null);
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const store = useStoreApi();
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// 添加编辑弹窗相关状态
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const [editingNode, setEditingNode] = useState<Node | null>(null);
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const [isEditModalOpen, setIsEditModalOpen] = useState(false);
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const onNodesChange = useCallback(
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(changes: any) => {
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const newNodes = applyNodeChanges(changes, nodes);
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setNodes(newNodes);
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// 如果需要在节点变化时执行某些操作，可以在这里添加
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},
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[nodes]
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);
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const onEdgesChange = useCallback(
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(changes: any) => {
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const newEdges = applyEdgeChanges(changes, edges);
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setEdges(newEdges);
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// 如果需要在边变化时执行某些操作，可以在这里添加
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},
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[edges]
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);
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const onConnect = useCallback(
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(params: any) => setEdges((edgesSnapshot) => addEdge({ ...params, type: 'custom' }, edgesSnapshot)),
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[]
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);
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// 边重新连接处理
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const onReconnect = useCallback(
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(oldEdge: Edge, newConnection: any) =>
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setEdges((els) => reconnectEdge(oldEdge, newConnection, els)),
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[]
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);
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const onDragOver = useCallback((event: React.DragEvent) => {
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event.preventDefault();
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event.dataTransfer.dropEffect = 'move';
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}, []);
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// 侧边栏节点实例
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const onDrop = useCallback(
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(event: React.DragEvent) => {
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event.preventDefault();
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if (!reactFlowInstance) return;
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const callBack = event.dataTransfer.getData('application/reactflow');
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const nodeData = JSON.parse(callBack);
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if (typeof nodeData.nodeType === 'undefined' || !nodeData.nodeType) {
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return;
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}
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const position = reactFlowInstance.screenToFlowPosition({
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x: event.clientX,
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y: event.clientY
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});
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const newNode = {
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id: `${nodeData.nodeType}-${Date.now()}`,
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type: nodeData.nodeType,
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position,
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data: { ...nodeData.data, title: nodeData.nodeName, type: nodeData.nodeType }
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};
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// 将未定义的节点动态追加进nodeTypes
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const nodeMap = Array.from(Object.values(nodeTypeMap).map(key => key));
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// 目前默认添加的都是系统组件/本地组件
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if (!nodeMap.includes(nodeData.nodeType)) registerNodeType(nodeData.nodeType, LocalNode, nodeData.nodeName);
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setNodes((nds) => nds.concat(newNode));
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},
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[reactFlowInstance]
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);
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useEffect(() => {
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const { nodes: convertedNodes, edges: convertedEdges } = convertFlowData(exampleFlowData);
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// 为所有边添加类型
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const initialEdges: Edge[] = convertedEdges.map(edge => ({
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...edge,
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type: 'custom'
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}));
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setNodes(convertedNodes);
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setEdges(initialEdges);
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}, []);
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// 节点右键菜单处理
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const onNodeContextMenu = useCallback(
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(event: React.MouseEvent, node: Node) => {
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event.preventDefault();
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const pane = reactFlowWrapper.current?.getBoundingClientRect();
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if (!pane) return;
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setMenu({
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id: node.id,
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type: 'node',
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top: event.clientY - pane.top,
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left: event.clientX - pane.left
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});
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},
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[setMenu]
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);
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// 节点双击处理
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const onNodeDoubleClick = useCallback(
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(event: React.MouseEvent, node: Node) => {
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setEditingNode(node);
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setIsEditModalOpen(true);
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},
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[]
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);
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// 边右键菜单处理
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const onEdgeContextMenu = useCallback(
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(event: React.MouseEvent, edge: Edge) => {
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event.preventDefault();
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const pane = reactFlowWrapper.current?.getBoundingClientRect();
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if (!pane) return;
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setMenu({
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id: edge.id,
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type: 'edge',
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top: event.clientY - pane.top,
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left: event.clientX - pane.left
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});
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},
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[setMenu]
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);
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// 点击画布其他区域关闭菜单
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const onPaneClick = useCallback(() => setMenu(null), [setMenu]);
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// 关闭编辑弹窗
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const closeEditModal = useCallback(() => {
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setIsEditModalOpen(false);
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setEditingNode(null);
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}, []);
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// 保存节点编辑
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const saveNodeEdit = useCallback((updatedData: any) => {
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console.log('updatedData:', updatedData);
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const updatedNodes = nodes.map((node) => {
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if (node.id === editingNode?.id) {
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return {
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...node,
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data: { ...node.data, ...updatedData }
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};
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}
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return node;
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});
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setNodes(updatedNodes);
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closeEditModal();
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// TODO 如果需要在节点编辑后立即保存到服务器，可以调用保存函数
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// saveFlowDataToServer();
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}, [nodes, editingNode, closeEditModal]);
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// 删除节点
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const deleteNode = useCallback((node: Node) => {
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setNodes((nds) => nds.filter((n) => n.id !== node.id));
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setEdges((eds) => eds.filter((e) => e.source !== node.id && e.target !== node.id));
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setMenu(null);
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}, []);
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// 删除边
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const deleteEdge = useCallback((edge: Edge) => {
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setEdges((eds) => eds.filter((e) => e.id !== edge.id));
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setMenu(null);
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}, []);
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// 编辑节点
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const editNode = useCallback((node: Node) => {
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setMenu(null);
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setEditingNode(node);
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setIsEditModalOpen(true);
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}, []);
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// 编辑边
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const editEdge = useCallback((edge: Edge) => {
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// 这里可以实现边编辑逻辑
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console.log('编辑边:', edge);
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setMenu(null);
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}, []);
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// 复制节点
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const copyNode = useCallback((node: Node) => {
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// 这里可以实现节点复制逻辑
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console.log('复制节点:', node);
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setMenu(null);
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}, []);
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// 保存所有节点和边数据到服务器
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const saveFlowDataToServer = useCallback(async () => {
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try {
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// 准备要发送到服务器的数据
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const flowData = {
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nodes: nodes,
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edges: edges
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};
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// TODO 接口对接后修改后续的更新操作
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console.log('flowData:', flowData);
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return;
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// 发送到服务器的示例代码（需要根据您的实际API进行调整）
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const response = await fetch('/api/flow/save', {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json'
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},
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body: JSON.stringify(flowData)
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});
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if (response.ok) {
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console.log('Flow data saved successfully');
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// 可以添加成功提示
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}
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else {
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console.error('Failed to save flow data');
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// 可以添加失败提示
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}
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} catch (error) {
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console.error('Error saving flow data:', error);
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// 可以添加错误提示
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}
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}, [nodes, edges]);
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return (
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<div ref={reactFlowWrapper} style={{ width: '100%', height: '100%', position: 'relative' }}>
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<ReactFlow
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nodes={nodes}
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edges={edges}
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nodeTypes={nodeTypes}
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edgeTypes={edgeTypes}
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onNodesChange={onNodesChange}
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onEdgesChange={onEdgesChange}
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onConnect={onConnect}
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onReconnect={onReconnect}
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onDrop={onDrop}
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onDragOver={onDragOver}
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onNodeContextMenu={onNodeContextMenu}
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onEdgeContextMenu={onEdgeContextMenu}
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onNodeDoubleClick={onNodeDoubleClick}
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onPaneClick={onPaneClick}
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onPaneContextMenu={onPaneClick}
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fitView
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selectionKeyCode={['Meta', 'Control']}
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selectionMode={SelectionMode.Partial}
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panOnDrag={[0, 1, 2]} // 支持多点触控平移
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zoomOnScroll={true}
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zoomOnPinch={true}
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panOnScrollSpeed={0.5}
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>
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<Background />
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<Controls />
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<Panel position="top-right">
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<div>从左侧拖拽节点到画布中</div>
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<button onClick={saveFlowDataToServer}>保存到服务器</button>
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</Panel>
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</ReactFlow>
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{/*节点右键上下文*/}
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{menu && menu.type === 'node' && (
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<div
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style={{
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position: 'absolute',
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top: menu.top,
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left: menu.left,
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zIndex: 1000
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}}
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>
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<NodeContextMenu
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node={nodes.find(n => n.id === menu.id)!}
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onDelete={deleteNode}
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onEdit={editNode}
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onCopy={copyNode}
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/>
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</div>
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)}
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{/*边右键上下文*/}
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{menu && menu.type === 'edge' && (
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<div
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style={{
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position: 'absolute',
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top: menu.top,
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left: menu.left,
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zIndex: 1000
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}}
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>
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<EdgeContextMenu
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edge={edges.find(e => e.id === menu.id)!}
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onDelete={deleteEdge}
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onEdit={editEdge}
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/>
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</div>
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)}
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{/*节点双击/节点编辑上下文*/}
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<NodeEditModal
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node={editingNode}
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isOpen={isEditModalOpen}
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onSave={saveNodeEdit}
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onClose={closeEditModal}
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/>
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</div>
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);
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};
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export default FlowEditorWithProvider; |