99 lines
3.0 KiB
TypeScript
99 lines
3.0 KiB
TypeScript
import React, { useState, MouseEvent } from 'react';
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import ReactFlow, {
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removeElements,
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addEdge,
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isNode,
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Background,
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Elements,
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BackgroundVariant,
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FlowElement,
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Node,
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Edge,
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Connection,
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OnLoadParams,
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} 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 initialNodes: Node[] = [
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{ id: '1', type: 'input', data: { label: 'Node 1' }, position: { x: 250, y: 5 }, className: 'light' },
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{ id: '2', data: { label: 'Node 2' }, position: { x: 100, y: 100 }, className: 'light' },
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{ id: '3', data: { label: 'Node 3' }, position: { x: 400, y: 100 }, className: 'light' },
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{ id: '4', data: { label: 'Node 4' }, position: { x: 400, y: 200 }, className: 'light' },
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];
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const initialEdges: Edge[] = [
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{ id: 'e1-2', source: '1', target: '2', animated: true },
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{ id: 'e1-3', source: '1', target: '3' },
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];
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const BasicFlow = () => {
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const [rfInstance, setRfInstance] = useState<OnLoadParams | null>(null);
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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 onElementsRemove = (elementsToRemove: Elements) => setNodes((els) => removeElements(elementsToRemove, els));
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// const onConnect = (params: Edge | Connection) => setNodes((els) => addEdge(params, els));
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const onLoad = (reactFlowInstance: OnLoadParams) => setRfInstance(reactFlowInstance);
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const updatePos = () => {
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setNodes((nds) => {
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return nds.map((n) => {
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n.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 n;
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});
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});
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};
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const logToObject = () => console.log(rfInstance?.toObject());
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const resetTransform = () => rfInstance?.setTransform({ x: 0, y: 0, zoom: 1 });
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const toggleClassnames = () => {
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setNodes((nds) => {
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return nds.map((n) => {
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n.className = n.className === 'light' ? 'dark' : 'light';
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return n;
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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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nodes={nodes}
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edges={edges}
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onLoad={onLoad}
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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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className="react-flow-basic-example"
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defaultZoom={1.5}
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minZoom={0.2}
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maxZoom={4}
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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={updatePos} style={{ marginRight: 5 }}>
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change pos
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</button>
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<button onClick={toggleClassnames} style={{ marginRight: 5 }}>
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toggle classnames
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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 BasicFlow;
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