87 lines
2.2 KiB
TypeScript
87 lines
2.2 KiB
TypeScript
import { useState, CSSProperties, useCallback } from 'react';
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import ReactFlow, {
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MiniMap,
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Controls,
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Background,
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ReactFlowInstance,
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Edge,
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Node,
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NodeChange,
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applyNodeChanges,
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Connection,
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addEdge,
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applyEdgeChanges,
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EdgeChange,
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} from 'react-flow-renderer';
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import { getNodesAndEdges } from './utils';
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const buttonWrapperStyles: CSSProperties = { position: 'absolute', right: 10, top: 10, zIndex: 4 };
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const onInit = (reactFlowInstance: ReactFlowInstance) => {
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reactFlowInstance.fitView();
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console.log(reactFlowInstance.getNodes());
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};
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const { nodes: initialNodes, edges: initialEdges } = getNodesAndEdges(25, 25);
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const StressFlow = () => {
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const [nodes, setNodes] = useState<Node[]>(initialNodes);
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const [edges, setEdges] = useState<Edge[]>(initialEdges);
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const onConnect = useCallback((connection: Connection) => {
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setEdges((eds) => addEdge(connection, eds));
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}, []);
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const updatePos = () => {
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setNodes((nds) => {
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return nds.map((n) => {
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return {
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...n,
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position: {
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x: Math.random() * window.innerWidth,
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y: Math.random() * window.innerHeight,
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},
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};
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});
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});
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};
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const updateElements = () => {
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const grid = Math.ceil(Math.random() * 10);
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const initialElements = getNodesAndEdges(grid, grid);
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setNodes(initialElements.nodes);
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setEdges(initialElements.edges);
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};
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const onNodesChange = useCallback((changes: NodeChange[]) => {
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setNodes((ns) => applyNodeChanges(changes, ns));
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}, []);
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const onEdgeChange = useCallback((changes: EdgeChange[]) => {
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setEdges((es) => applyEdgeChanges(changes, es));
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}, []);
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return (
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<ReactFlow
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nodes={nodes}
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edges={edges}
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onInit={onInit}
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onConnect={onConnect}
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onNodesChange={onNodesChange}
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onEdgesChange={onEdgeChange}
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>
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<MiniMap />
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<Controls />
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<Background />
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<div style={buttonWrapperStyles}>
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<button onClick={updatePos} style={{ marginRight: 5 }}>
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change pos
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</button>
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<button onClick={updateElements}>update elements</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 StressFlow;
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