Files
xyflow/examples/demo/src/DefaultNodes/index.tsx
2022-07-19 15:12:37 +02:00

110 lines
2.3 KiB
TypeScript

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