Horizontal Source Code
index.js
import React, { useState } from 'react';
import ReactFlow, { removeElements, addEdge } from 'react-flow-renderer';
const onLoad = (reactFlowInstance) => reactFlowInstance.fitView();
const onNodeMouseEnter = (event, node) => console.log('mouse enter:', node);
const onNodeMouseMove = (event, node) => console.log('mouse move:', node);
const onNodeMouseLeave = (event, node) => console.log('mouse leave:', node);
const onNodeContextMenu = (event, node) => {
event.preventDefault();
console.log('context menu:', node);
};
const initialElements = [
{
id: 'horizontal-1',
sourcePosition: 'right',
type: 'input',
className: 'dark-node',
data: { label: 'Input' },
position: { x: 0, y: 80 },
},
{
id: 'horizontal-2',
sourcePosition: 'right',
targetPosition: 'left',
data: { label: 'A Node' },
position: { x: 250, y: 0 },
},
{
id: 'horizontal-3',
sourcePosition: 'right',
targetPosition: 'left',
data: { label: 'Node 3' },
position: { x: 250, y: 160 },
},
{
id: 'horizontal-4',
sourcePosition: 'right',
targetPosition: 'left',
data: { label: 'Node 4' },
position: { x: 500, y: 0 },
},
{
id: 'horizontal-5',
sourcePosition: 'top',
targetPosition: 'bottom',
data: { label: 'Node 5' },
position: { x: 500, y: 100 },
},
{
id: 'horizontal-6',
sourcePosition: 'bottom',
targetPosition: 'top',
data: { label: 'Node 6' },
position: { x: 500, y: 230 },
},
{
id: 'horizontal-7',
sourcePosition: 'right',
targetPosition: 'left',
data: { label: 'Node 7' },
position: { x: 750, y: 50 },
},
{
id: 'horizontal-8',
sourcePosition: 'right',
targetPosition: 'left',
data: { label: 'Node 8' },
position: { x: 750, y: 300 },
},
{
id: 'horizontal-e1-2',
source: 'horizontal-1',
type: 'smoothstep',
target: 'horizontal-2',
animated: true,
},
{
id: 'horizontal-e1-3',
source: 'horizontal-1',
type: 'smoothstep',
target: 'horizontal-3',
animated: true,
},
{
id: 'horizontal-e1-4',
source: 'horizontal-2',
type: 'smoothstep',
target: 'horizontal-4',
label: 'edge label',
},
{
id: 'horizontal-e3-5',
source: 'horizontal-3',
type: 'smoothstep',
target: 'horizontal-5',
animated: true,
},
{
id: 'horizontal-e3-6',
source: 'horizontal-3',
type: 'smoothstep',
target: 'horizontal-6',
animated: true,
},
{
id: 'horizontal-e5-7',
source: 'horizontal-5',
type: 'smoothstep',
target: 'horizontal-7',
animated: true,
},
{
id: 'horizontal-e6-8',
source: 'horizontal-6',
type: 'smoothstep',
target: 'horizontal-8',
animated: true,
},
];
const HorizontalFlow = () => {
const [elements, setElements] = useState(initialElements);
const onElementsRemove = (elementsToRemove) =>
setElements((els) => removeElements(elementsToRemove, els));
const onConnect = (params) => setElements((els) => addEdge(params, els));
const changeClassName = () => {
setElements((elms) =>
elms.map((el) => {
if (el.type === 'input') {
el.className = el.className ? '' : 'dark-node';
}
return { ...el };
})
);
};
return (
<ReactFlow
elements={elements}
onElementsRemove={onElementsRemove}
onConnect={onConnect}
onLoad={onLoad}
selectNodesOnDrag={false}
onNodeMouseEnter={onNodeMouseEnter}
onNodeMouseMove={onNodeMouseMove}
onNodeMouseLeave={onNodeMouseLeave}
onNodeContextMenu={onNodeContextMenu}
>
<button
onClick={changeClassName}
style={{ position: 'absolute', right: 10, top: 30, zIndex: 4 }}
>
change class name
</button>
</ReactFlow>
);
};
export default HorizontalFlow;