110 lines
2.3 KiB
TypeScript
110 lines
2.3 KiB
TypeScript
import ReactFlow, {
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useReactFlow,
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Background,
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BackgroundVariant,
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Node,
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Edge,
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ReactFlowProvider,
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} from '@react-flow/core';
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const defaultNodes: Node[] = [
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{
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id: '1',
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type: 'input',
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data: { label: 'Node 1' },
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position: { x: 250, y: 5 },
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className: 'light',
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},
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{
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id: '2',
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data: { label: 'Node 2' },
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position: { x: 100, y: 100 },
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className: 'light',
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},
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{
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id: '3',
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data: { label: 'Node 3' },
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position: { x: 400, y: 100 },
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className: 'light',
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},
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{
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id: '4',
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data: { label: 'Node 4' },
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position: { x: 400, y: 200 },
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className: 'light',
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},
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];
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const defaultEdges: Edge[] = [
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{ id: 'e1-2', source: '1', target: '2' },
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{ id: 'e1-3', source: '1', target: '3' },
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];
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const defaultEdgeOptions = {
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animated: true,
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};
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const DefaultNodes = () => {
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const instance = useReactFlow();
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const logToObject = () => console.log(instance.toObject());
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const resetTransform = () => instance.setViewport({ x: 0, y: 0, zoom: 1 });
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const updateNodePositions = () => {
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instance.setNodes((nodes) =>
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nodes.map((node) => {
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node.position = {
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x: Math.random() * 400,
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y: Math.random() * 400,
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};
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return node;
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})
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);
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};
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const updateEdgeColors = () => {
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instance.setEdges((edges) =>
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edges.map((edge) => {
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edge.style = {
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stroke: '#ff5050',
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};
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return edge;
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})
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);
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};
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return (
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<ReactFlow
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defaultNodes={defaultNodes}
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defaultEdges={defaultEdges}
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defaultEdgeOptions={defaultEdgeOptions}
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fitView
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>
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<Background variant={BackgroundVariant.Lines} />
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<div style={{ position: 'absolute', right: 10, top: 10, zIndex: 4 }}>
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<button onClick={resetTransform} style={{ marginRight: 5 }}>
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reset transform
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</button>
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<button onClick={updateNodePositions} style={{ marginRight: 5 }}>
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change pos
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</button>
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<button onClick={updateEdgeColors} style={{ marginRight: 5 }}>
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red edges
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</button>
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<button onClick={logToObject}>toObject</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 function App() {
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return (
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<ReactFlowProvider>
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<DefaultNodes />
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</ReactFlowProvider>
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);
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}
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