diff --git a/examples/react/src/examples/Middlewares/RestrictExtent.tsx b/examples/react/src/examples/Middlewares/RestrictExtent.tsx
new file mode 100644
index 00000000..beec2630
--- /dev/null
+++ b/examples/react/src/examples/Middlewares/RestrictExtent.tsx
@@ -0,0 +1,55 @@
+import { NodeChange, Panel, useNodeChangeMiddleware } from '@xyflow/react';
+import { useCallback, useState } from 'react';
+
+export function RestrictExtent({
+ label = 'Restrict Extent',
+ minX = -Infinity,
+ minY = -Infinity,
+ maxX = Infinity,
+ maxY = Infinity,
+}: {
+ label?: string;
+ minX?: number;
+ minY?: number;
+ maxX?: number;
+ maxY?: number;
+}) {
+ const [isEnabled, setIsEnabled] = useState(false);
+ useNodeChangeMiddleware(
+ useCallback(
+ (changes: NodeChange[]) => {
+ if (!isEnabled) return changes;
+ return changes.map((change) => {
+ const { type } = change;
+ if (type === 'position') {
+ const { position } = change;
+ if (position) {
+ position.x = Math.min(Math.max(position.x, minX), maxX);
+ position.y = Math.min(Math.max(position.y, minY), maxY);
+ change.position = position;
+ }
+ } else if (type === 'add' || type === 'replace') {
+ const { item } = change;
+ if (item) {
+ item.position.x = Math.min(Math.max(item.position.x, minX), maxX);
+ item.position.y = Math.min(Math.max(item.position.y, minY), maxY);
+ change.item = item;
+ }
+ }
+
+ return change;
+ });
+ },
+ [minX, minY, maxX, maxY, isEnabled]
+ )
+ );
+
+ return (
+
+
+
+ );
+}
diff --git a/examples/react/src/examples/Middlewares/index.tsx b/examples/react/src/examples/Middlewares/index.tsx
index b3950b3d..c7a05770 100644
--- a/examples/react/src/examples/Middlewares/index.tsx
+++ b/examples/react/src/examples/Middlewares/index.tsx
@@ -6,7 +6,6 @@ import {
BackgroundVariant,
Controls,
ReactFlowProvider,
- Node,
Edge,
useReactFlow,
Panel,
@@ -14,57 +13,14 @@ import {
useEdgesState,
addEdge,
Connection,
- useNodeChangeMiddleware,
- NodeChange,
} from '@xyflow/react';
import { initialNodes, initialEdges } from '../CancelConnection/data';
+import { RestrictExtent } from './RestrictExtent';
const a = { id: 'a', data: { label: 'A' }, position: { x: 250, y: 5 } };
const b = { id: 'b', data: { label: 'B' }, position: { x: 100, y: 100 } };
const c = { id: 'c', data: { label: 'C' }, position: { x: 400, y: 100 } };
-function RestrictExtent({
- minX = -Infinity,
- minY = -Infinity,
- maxX = Infinity,
- maxY = Infinity,
-}: {
- minX?: number;
- minY?: number;
- maxX?: number;
- maxY?: number;
-}) {
- useNodeChangeMiddleware(
- useCallback(
- (changes: NodeChange[]) => {
- return changes.map((change) => {
- const { type } = change;
- if (type === 'position') {
- const { position } = change;
- if (position) {
- position.x = Math.min(Math.max(position.x, minX), maxX);
- position.y = Math.min(Math.max(position.y, minY), maxY);
- change.position = position;
- }
- } else if (type === 'add' || type === 'replace') {
- const { item } = change;
- if (item) {
- item.position.x = Math.min(Math.max(item.position.x, minX), maxX);
- item.position.y = Math.min(Math.max(item.position.y, minY), maxY);
- change.item = item;
- }
- }
-
- return change;
- });
- },
- [minX, minY, maxX, maxY]
- )
- );
-
- return null;
-}
-
const SetNotesBatchingFlow = () => {
const { setNodes, updateNode } = useReactFlow();
@@ -99,15 +55,19 @@ const SetNotesBatchingFlow = () => {
edges={edges}
onNodesChange={onNodesChange}
onEdgesChange={onEdgesChange}
+ onConnect={onConnect}
className="react-flow-basic-example"
minZoom={0.2}
maxZoom={4}
fitView
>
+
+
+
+
-