fix(nodes): re-measure nodes when dimensions are missing

examples/react/src/examples/CustomMiniMapNode/index.tsx

@@ -27,9 +27,9 @@ const buttonStyle: CSSProperties = {
   zIndex: 4,
 };
 
-const CustomMiniMapNode = ({ x, y, width, height, color }: MiniMapNodeProps) => (
-  <circle cx={x} cy={y} r={Math.max(width, height) / 2} fill={color} />
-);
+const CustomMiniMapNode = ({ x, y, width, height }: MiniMapNodeProps) => {
+  return <circle cx={x} cy={y} r={Math.max(width, height) / 2} fill="#ffcc00" />;
+};
 
 const CustomMiniMapNodeFlow = () => {
   const [nodes, setNodes, onNodesChange] = useNodesState<Node>([]);

examples/react/src/examples/Subflow/index.tsx

@@ -90,7 +90,7 @@ const initialNodes: Node[] = [
     data: { label: 'Node 5' },
     position: { x: 650, y: 250 },
     className: 'light',
-    style: { width: 400, height: 150 },
+    style: { width: 100, height: 100 },
     zIndex: 1000,
   },
   {
@@ -161,9 +161,12 @@ const Subflow = () => {
     setNodes((nds) => {
       return nds.map((n) => {
         if (!n.parentNode) {
-          n.position = {
-            x: Math.random() * 400,
-            y: Math.random() * 400,
+          return {
+            ...n,
+            position: {
+              x: Math.random() * 400,
+              y: Math.random() * 400,
+            },
           };
         }
 
@@ -178,8 +181,10 @@ const Subflow = () => {
   const toggleClassnames = () => {
     setNodes((nds) => {
       return nds.map((n) => {
-        n.className = n.className === 'light' ? 'dark' : 'light';
-        return n;
+        return {
+          ...n,
+          className: n.className === 'light' ? 'dark' : 'light',
+        };
       });
     });
   };
@@ -187,8 +192,10 @@ const Subflow = () => {
   const toggleChildNodes = () => {
     setNodes((nds) => {
       return nds.map((n) => {
-        n.hidden = !!n.parentNode && !n.hidden;
-        return n;
+        return {
+          ...n,
+          hidden: !!n.parentNode && !n.hidden,
+        };
       });
     });
   };
@@ -215,19 +222,12 @@ const Subflow = () => {
       <Background />
 
       <Panel position="top-right">
-        <button onClick={resetTransform} style={{ marginRight: 5 }}>
-          reset transform
-        </button>
-        <button onClick={updatePos} style={{ marginRight: 5 }}>
-          change pos
-        </button>
-        <button onClick={toggleClassnames} style={{ marginRight: 5 }}>
-          toggle classnames
-        </button>
-        <button style={{ marginRight: 5 }} onClick={toggleChildNodes}>
-          toggleChildNodes
-        </button>
+        <button onClick={resetTransform}>reset transform</button>
+        <button onClick={updatePos}>change pos</button>
+        <button onClick={toggleClassnames}>toggle classnames</button>
+        <button onClick={toggleChildNodes}>toggleChildNodes</button>
         <button onClick={logToObject}>toObject</button>
+        <button onClick={() => setNodes(initialNodes)}>setNodes</button>
       </Panel>
     </ReactFlow>
   );

packages/react/src/components/NodeWrapper/index.tsx

@@ -79,16 +79,27 @@ export function NodeWrapper({
   const prevTargetPosition = useRef(node.targetPosition);
   const prevType = useRef(nodeType);
 
+  const width = node.width ?? undefined;
+  const height = node.height ?? undefined;
+  const computedWidth = node.computed?.width;
+  const computedHeight = node.computed?.height;
+  const initialized = (!!computedWidth && !!computedHeight) || (!!width && !!height);
+
   const moveSelectedNodes = useMoveSelectedNodes();
 
   useEffect(() => {
     if (nodeRef.current && !node.hidden) {
       const currNode = nodeRef.current;
-      resizeObserver?.observe(currNode);
+
+      if (!initialized) {
+        resizeObserver?.observe(currNode);
+      } else {
+        resizeObserver?.unobserve(currNode);
+      }
 
       return () => resizeObserver?.unobserve(currNode);
     }
-  }, [node.hidden]);
+  }, [node.hidden, initialized]);
 
   useEffect(() => {
     // when the user programmatically changes the source or handle position, we re-initialize the node
@@ -123,11 +134,6 @@ export function NodeWrapper({
     return null;
   }
 
-  const width = node.width ?? undefined;
-  const height = node.height ?? undefined;
-  const computedWidth = node.computed?.width;
-  const computedHeight = node.computed?.height;
-
   const positionAbsoluteOrigin = getPositionWithOrigin({
     x: positionAbsoluteX,
     y: positionAbsoluteY,
@@ -135,7 +141,6 @@ export function NodeWrapper({
     height: computedHeight ?? height ?? 0,
     origin: node.origin || nodeOrigin,
   });
-  const initialized = (!!computedWidth && !!computedHeight) || (!!width && !!height);
   const hasPointerEvents = isSelectable || isDraggable || onClick || onMouseEnter || onMouseMove || onMouseLeave;
 
   const onMouseEnterHandler = onMouseEnter ? (event: MouseEvent) => onMouseEnter(event, { ...node }) : undefined;

packages/system/src/utils/store.ts

@@ -94,8 +94,8 @@ export function adoptUserProvidedNodes<NodeType extends NodeBase>(
       ...n,
       computed: {
         positionAbsolute: n.position,
-        width: n.computed?.width || currentStoreNode?.computed?.width,
-        height: n.computed?.height || currentStoreNode?.computed?.height,
+        width: n.computed?.width,
+        height: n.computed?.height,
       },
     };
     const z = (isNumeric(n.zIndex) ? n.zIndex : 0) + (n.selected ? selectedNodeZ : 0);