92 lines
3.5 KiB
JavaScript
92 lines
3.5 KiB
JavaScript
import React, { useState } from 'react';
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import ReactFlow, { removeElements, addEdge, MiniMap, Controls, Background } from 'react-flow-renderer';
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const onNodeDragStart = node => console.log('drag start', node);
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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 onSelectionChange = elements => console.log('selection change', elements);
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const onLoad = (reactFlowInstance) => {
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console.log('graph loaded:', reactFlowInstance);
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reactFlowInstance.fitView();
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};
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const initialElements = [
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{ id: '1', type: 'input', data: { label: <>Welcome to <strong>React Flow!</strong></> }, position: { x: 250, y: 0 } },
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{ id: '2', data: { label: <>This is a <strong>default node</strong></> }, position: { x: 100, y: 100 } },
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{
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id: '3', data: { label: <>This one has a <strong>custom style</strong></> }, position: { x: 400, y: 100 },
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style: { background: '#eee', color: '#222', border: '1px solid #bbb', width: 180 },
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},
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{
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id: '4', position: { x: 250, y: 200 },
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data: { label: <>You can find the docs on <a href="https://github.com/wbkd/react-flow" target="_blank" rel="noopener noreferrer">Github</a></> }
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},
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{ id: '5', data: { label: <>Or check out the other <strong>examples</strong></> }, position: { x: 250, y: 300 } },
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{ id: '6', type: 'output', data: { label: <>An <strong>output node</strong></> }, position: { x: 100, y: 450 } },
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{ id: '7', type: 'output', data: { label: 'Another output node' }, position: { x: 400, y: 450 } },
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{ id: 'e1-2', source: '1', target: '2', label: 'this is an edge label' },
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{ id: 'e1-3', source: '1', target: '3' },
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{ id: 'e3-4', source: '3', target: '4', animated: true, label: 'animated edge' },
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{ id: 'e4-5', source: '4', target: '5', },
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{ id: 'e5-6', source: '5', target: '6', },
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{ id: 'e5-7', source: '5', target: '7', type: 'step', label: 'a step edge', labelStyle: { fill: 'red', fontWeight: 700 } },
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];
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const OverviewFlow = () => {
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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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<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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onNodeDragStart={onNodeDragStart}
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onNodeDragStop={onNodeDragStop}
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onSelectionChange={onSelectionChange}
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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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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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<Background
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color="#888"
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gap={16}
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/>
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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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className="overview-example__add"
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>
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add node
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</button>
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</ReactFlow>
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);
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}
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export default OverviewFlow; |