80 lines
2.8 KiB
JavaScript
80 lines
2.8 KiB
JavaScript
import React, { useState } from 'react';
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import Graph, { removeElements, addEdge, MiniMap, Controls } from 'react-flow-renderer';
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const onNodeDragStop = node => console.log('drag stop', node);
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const onElementClick = element => console.log('click', element);
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const onLoad = (graph) => {
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console.log('graph loaded:', graph);
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graph.fitView();
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};
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const initialElements = [
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{ id: '1', type: 'input', data: { label: 'Input Node 1' }, position: { x: 250, y: 5 } },
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{ id: '2', data: { label: 'Node 2' }, position: { x: 150, y: 75 } },
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{
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id: '3', data: { label: 'Node 3 with custom style' }, position: { x: 250, y: 150 },
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style: { background: '#eee', color: '#222', border: '1px solid #bbb' },
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sourcePosition: 'right'
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},
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{ id: '4', data: { label: 'Node 4' }, position: { x: 500, y: 200 }, targetPosition: 'left' },
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{ id: '5', type: 'output', data: { label: 'Output Node 5'}, position: { x: 300, y: 300 } },
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{ id: '6', type: 'output', data: { label: 'Output Node 6' }, position: { x: 600, y: 400 } },
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{ id: 'e1-2', source: '1', target: '2', animated: true },
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{ id: 'e2-3', source: '2', target: '3', animated: true },
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{ id: 'e3-4', source: '3', target: '4', animated: true },
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{ id: 'e3-5', source: '4', target: '5', animated: true, type: 'step' },
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{ id: 'e5-6b', source: '4', target: '6', type: 'step' },
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]
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const RichGraph = () => {
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const [elements, setElements] = useState(initialElements);
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const addRandomNode = () => {
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setElements(els => els.concat({
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id: (els.length + 1).toString(),
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data: { label: 'Added node' },
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position: { x: Math.random() * window.innerWidth, y: Math.random() * window.innerHeight }
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}));
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};
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const onElementsRemove = (elementsToRemove) => setElements(els => removeElements(elementsToRemove, els));
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const onConnect = (params) => setElements(els => addEdge(params, els));
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return (
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<Graph
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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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style={{ width: '100%', height: '100%' }}
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onLoad={onLoad}
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connectionLineStyle={{ stroke: '#ddd', strokeWidth: 2 }}
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connectionLineType="bezier"
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backgroundColor="#888"
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backgroundGap={16}
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snapToGrid={true}
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snapGrid={[16, 16]}
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>
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<MiniMap
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nodeColor={n => {
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if (n.type === 'input') return 'blue';
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if (n.type === 'output') return 'green';
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if (n.type === 'default') return 'red';
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return '#FFCC00';
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}}
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/>
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<Controls />
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<button
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type="button"
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onClick={addRandomNode}
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style={{ position: 'absolute', right: 10, top: 30, zIndex: 4 }}
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>
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add node
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</button>
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</Graph>
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);
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}
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export default RichGraph; |