101 lines
2.6 KiB
TypeScript
101 lines
2.6 KiB
TypeScript
import ReactFlow, {
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ReactFlowProvider,
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Background,
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BackgroundVariant,
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Node,
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Edge,
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useReactFlow,
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useKeyPress,
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} from 'react-flow-renderer';
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const MULTI_SELECT_KEY = ['Meta', 'Shift'];
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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 defaultEdgeOptions = { zIndex: 0 };
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const logEvent = (e: any) => console.log(e);
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const BasicFlow = () => {
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const instance = useReactFlow();
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const spaceBarPressed = useKeyPress('Space');
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const updatePos = () => {
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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 logToObject = () => console.log(instance.toObject());
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const resetTransform = () => instance.setViewport({ x: 0, y: 0, zoom: 1 });
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const toggleClassnames = () => {
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instance.setNodes((nodes) =>
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nodes.map((node) => {
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node.className = node.className === 'light' ? 'dark' : 'light';
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return node;
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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={initialNodes}
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defaultEdges={initialEdges}
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selectBoxOnDrag
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panOnDrag={spaceBarPressed ? true : 'RightClick'}
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panOnScroll
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onPaneContextMenu={logEvent}
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zoomActivationKeyCode={'Meta'}
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multiSelectionKeyCode={MULTI_SELECT_KEY}
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className="react-flow-basic-example"
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minZoom={0.2}
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maxZoom={4}
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fitView
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defaultEdgeOptions={defaultEdgeOptions}
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selectNodesOnDrag={false}
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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 function App() {
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return (
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<ReactFlowProvider>
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<BasicFlow />
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</ReactFlowProvider>
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);
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}
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