74 lines
2.2 KiB
TypeScript
74 lines
2.2 KiB
TypeScript
import React, { useState, MouseEvent as ReactMouseEvent, FC } from 'react';
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import ReactFlow, {
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addEdge,
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Handle,
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OnLoadParams,
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Connection,
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Position,
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Elements,
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Edge,
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OnConnectStartParams,
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NodeProps,
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NodeTypesType,
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} from 'react-flow-renderer';
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import './validation.css';
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const initialElements: Elements = [
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{ id: '0', type: 'custominput', position: { x: 0, y: 150 } },
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{ id: 'A', type: 'customnode', position: { x: 250, y: 0 } },
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{ id: 'B', type: 'customnode', position: { x: 250, y: 150 } },
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{ id: 'C', type: 'customnode', position: { x: 250, y: 300 } },
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];
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const onLoad = (reactFlowInstance: OnLoadParams) => reactFlowInstance.fitView();
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const isValidConnection = (connection: Connection) => connection.target === 'B';
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const onConnectStart = (_: ReactMouseEvent, { nodeId, handleType }: OnConnectStartParams) =>
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console.log('on connect start', { nodeId, handleType });
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const onConnectStop = (event: MouseEvent) => console.log('on connect stop', event);
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const onConnectEnd = (event: MouseEvent) => console.log('on connect end', event);
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const CustomInput: FC<NodeProps> = () => (
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<>
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<div>Only connectable with B</div>
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<Handle type="source" position={Position.Right} isValidConnection={isValidConnection} />
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</>
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);
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const CustomNode: FC<NodeProps> = ({ id }) => (
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<>
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<Handle type="target" position={Position.Left} isValidConnection={isValidConnection} />
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<div>{id}</div>
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<Handle type="source" position={Position.Right} isValidConnection={isValidConnection} />
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</>
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);
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const nodeTypes: NodeTypesType = {
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custominput: CustomInput,
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customnode: CustomNode,
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};
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const HorizontalFlow = () => {
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const [elements, setElements] = useState<Elements>(initialElements);
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const onConnect = (params: Connection | Edge) => {
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console.log('on connect', params);
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setElements((els) => addEdge(params, els));
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};
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return (
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<ReactFlow
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elements={elements}
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onConnect={onConnect}
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selectNodesOnDrag={false}
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onLoad={onLoad}
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className="validationflow"
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nodeTypes={nodeTypes}
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onConnectStart={onConnectStart}
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onConnectStop={onConnectStop}
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onConnectEnd={onConnectEnd}
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/>
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);
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};
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export default HorizontalFlow;
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