54 lines
2.4 KiB
TypeScript
54 lines
2.4 KiB
TypeScript
import React, { useState, MouseEvent } from 'react';
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import ReactFlow, { removeElements, addEdge, Node, FlowElement, Elements, Connection, Edge } from 'react-flow-renderer';
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const onNodeDragStop = (_: MouseEvent, node: Node) => console.log('drag stop', node);
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const onElementClick = (_: MouseEvent, element: FlowElement) => console.log('click', element);
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const elementsA: Elements = [
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{ id: '1a', type: 'input', data: { label: 'Node 1' }, position: { x: 250, y: 5 }, className: 'light' },
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{ id: '2a', data: { label: 'Node 2' }, position: { x: 100, y: 100 }, className: 'light' },
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{ id: '3a', data: { label: 'Node 3' }, position: { x: 400, y: 100 }, className: 'light' },
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{ id: '4a', data: { label: 'Node 4' }, position: { x: 400, y: 200 }, className: 'light' },
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{ id: 'e1-2', source: '1a', target: '2a' },
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{ id: 'e1-3', source: '1a', target: '3a' },
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];
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const elementsB: Elements = [
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{ id: 'inputb', type: 'input', data: { label: 'Input' }, position: { x: 300, y: 5 }, className: 'light' },
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{ id: '1b', data: { label: 'Node 1' }, position: { x: 0, y: 100 }, className: 'light' },
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{ id: '2b', data: { label: 'Node 2' }, position: { x: 200, y: 100 }, className: 'light' },
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{ id: '3b', data: { label: 'Node 3' }, position: { x: 400, y: 100 }, className: 'light' },
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{ id: '4b', data: { label: 'Node 4' }, position: { x: 600, y: 100 }, className: 'light' },
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{ id: 'e1b', source: 'inputb', target: '1b' },
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{ id: 'e2b', source: 'inputb', target: '2b' },
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{ id: 'e3b', source: 'inputb', target: '3b' },
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{ id: 'e4b', source: 'inputb', target: '4b' },
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];
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const BasicFlow = () => {
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const [elements, setElements] = useState<Elements>(elementsA);
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const onElementsRemove = (elementsToRemove: Elements) => setElements((els) => removeElements(elementsToRemove, els));
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const onConnect = (params: Connection | Edge) => setElements((els) => addEdge(params, els));
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return (
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<ReactFlow
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elements={elements}
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onElementClick={onElementClick}
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onElementsRemove={onElementsRemove}
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onConnect={onConnect}
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onNodeDragStop={onNodeDragStop}
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>
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<div style={{ position: 'absolute', right: 10, top: 10, zIndex: 4 }}>
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<button onClick={() => setElements(elementsA)} style={{ marginRight: 5 }}>
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flow a
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</button>
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<button onClick={() => setElements(elementsB)}>flow b</button>
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</div>
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</ReactFlow>
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);
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};
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export default BasicFlow;
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