feat(nested-nodes): simplify nested node rendering

example/src/Basic/index.tsx

@@ -26,38 +26,40 @@ const initialNodes: Node[] = [
   {
     id: '4',
     data: { label: 'Node 4' },
-    position: { x: 0, y: 0 },
+    position: { x: 100, y: 200 },
     className: 'light',
     style: { backgroundColor: 'rgba(255, 0, 0, .2)' },
-    width: 0,
-    height: 0,
+    width: 600,
+    height: 300,
   },
   {
     id: '4a',
     data: { label: 'Node 4a' },
-    position: { x: 70, y: 200 },
+    position: { x: 115, y: 215 },
     className: 'light',
     parentNode: '4',
   },
   {
     id: '4b',
     data: { label: 'Node 4b' },
-    position: { x: 0, y: 0 },
+    position: { x: 250, y: 250 },
     className: 'light',
     style: { backgroundColor: 'rgba(255, 0, 0, .2)' },
     parentNode: '4',
+    height: 200,
+    width: 350,
   },
   {
     id: '4b1',
     data: { label: 'Node 4b1' },
-    position: { x: 150, y: 270 },
+    position: { x: 270, y: 270 },
     className: 'light',
     parentNode: '4b',
   },
   {
     id: '4b2',
     data: { label: 'Node 4b2' },
-    position: { x: 420, y: 370 },
+    position: { x: 500, y: 400 },
     className: 'light',
     parentNode: '4b',
   },
@@ -129,18 +131,9 @@ const BasicFlow = () => {
     setEdges((es) => applyEdgeChanges(changes, es));
   }, []);
 
-  const nodesWithLabel = useMemo(
-    () =>
-      nodes.map((n) => {
-        n.data = { ...n.data, label: `${n.width}x${n.height}` };
-        return n;
-      }),
-    [nodes]
-  );
-
   return (
     <ReactFlow
-      nodes={nodesWithLabel}
+      nodes={nodes}
       edges={edges}
       onLoad={onLoad}
       onNodesChange={onNodesChange}

src/components/Nodes/wrapNode.tsx

@@ -23,6 +23,8 @@ export default (NodeComponent: ComponentType<NodeComponentProps>) => {
     scale,
     xPos,
     yPos,
+    width,
+    height,
     isSelected,
     onClick,
     onMouseEnter,
@@ -49,6 +51,7 @@ export default (NodeComponent: ComponentType<NodeComponentProps>) => {
     resizeObserver,
     dragHandle,
     zIndex,
+    isParentNode,
   }: WrapNodeProps) => {
     const {
       addSelectedElements,
@@ -70,6 +73,8 @@ export default (NodeComponent: ComponentType<NodeComponentProps>) => {
           isSelectable || isDraggable || onClick || onMouseEnter || onMouseMove || onMouseLeave ? 'all' : 'none',
         // prevents jumping of nodes on start
         // opacity: isInitialized ? 1 : 0,
+        width: isParentNode && width !== null ? width : 'auto',
+        height: isParentNode && height !== null ? height : 'auto',
         ...style,
       }),
       [
@@ -84,6 +89,7 @@ export default (NodeComponent: ComponentType<NodeComponentProps>) => {
         onMouseEnter,
         onMouseMove,
         onMouseLeave,
+        isParentNode,
       ]
     );
 
@@ -200,10 +206,10 @@ export default (NodeComponent: ComponentType<NodeComponentProps>) => {
     );
 
     useEffect(() => {
-      if (nodeElement.current && !isHidden && !isInitialized) {
+      if (nodeElement.current && !isHidden && (!isInitialized || isParentNode)) {
         updateNodeDimensions([{ id, nodeElement: nodeElement.current, forceUpdate: true }]);
       }
-    }, [id, isHidden, sourcePosition, targetPosition, isInitialized]);
+    }, [id, isHidden, sourcePosition, targetPosition, isInitialized, isParentNode]);
 
     useEffect(() => {
       if (nodeElement.current) {
@@ -225,6 +231,7 @@ export default (NodeComponent: ComponentType<NodeComponentProps>) => {
       {
         selected: isSelected,
         selectable: isSelectable,
+        parent: isParentNode,
       },
     ]);
 

src/container/NodeRenderer/index.tsx

@@ -1,9 +1,8 @@
-import React, { memo, useMemo, ComponentType, MouseEvent, Fragment, useEffect } from 'react';
+import React, { memo, useMemo, ComponentType, MouseEvent, Fragment } from 'react';
 import shallow from 'zustand/shallow';
 
 import { useStore } from '../../store';
 import { Node, NodeTypesType, ReactFlowState, WrapNodeProps, SnapGrid } from '../../types';
-import { getRectOfNodes } from '../../utils/graph';
 import useVisibleNodes from '../../hooks/useVisibleNodes';
 interface NodeRendererProps {
   nodeTypes: NodeTypesType;
@@ -63,7 +62,7 @@ function Node({
   recursionDepth,
   ...props
 }: NodeProps) {
-  const onNodesChange = useStore((s) => s.onNodesChange);
+  // const onNodesChange = useStore((s) => s.onNodesChange);
   const NodeComponent = (props.nodeTypes[nodeType] || props.nodeTypes.default) as ComponentType<WrapNodeProps>;
   const isNodeDraggable =
     typeof isDraggable !== 'undefined'
@@ -77,39 +76,13 @@ function Node({
     typeof node.width !== 'undefined' &&
     typeof node.height !== 'undefined';
 
-  const { childNodes = [] } = node;
-  const childRect = useMemo(() => getRectOfNodes(childNodes), [childNodes]);
-  const isParentNode = !!childNodes.length;
-
-  const style = useMemo(() => {
-    if (isParentNode) {
-      return {
-        ...node.style,
-        width: Math.floor(childRect.width) + 20,
-        height: Math.floor(childRect.height) + 20,
-        boxSizing: 'border-box',
-      } as React.CSSProperties;
-    }
-    return node.style;
-  }, [childRect.width, childRect.height, isParentNode, node.style]);
-
-  useEffect(() => {
-    if (onNodesChange && isParentNode) {
-      onNodesChange([
-        {
-          type: 'position',
-          id: node.id,
-          position: { x: Math.floor(childRect.x) - 10, y: Math.floor(childRect.y) - 10 },
-        },
-      ]);
-    }
-  }, [childRect.width, childRect.height, childRect.x, childRect.y, isParentNode]);
+  const isParentNode = !!node.childNodes?.length;
 
   return (
     <NodeComponent
       id={node.id}
       className={node.className}
-      style={style}
+      style={node.style}
       type={nodeType}
       data={node.data}
       sourcePosition={node.sourcePosition}
@@ -117,6 +90,8 @@ function Node({
       isHidden={node.isHidden}
       xPos={node.position.x}
       yPos={node.position.y}
+      width={node.width}
+      height={node.height}
       isDragging={node.isDragging}
       isInitialized={isInitialized}
       snapGrid={snapGrid}
@@ -139,6 +114,7 @@ function Node({
       resizeObserver={resizeObserver}
       dragHandle={node.dragHandle}
       zIndex={3 + recursionDepth}
+      isParentNode={isParentNode}
     />
   );
 }

src/store/index.ts

@@ -25,7 +25,7 @@ import {
   OnNodesChange,
   OnEdgesChange,
   EdgeChange,
-  NodePositionChange,
+  NodeDimensionChange,
 } from '../types';
 import { isNode, isEdge, getRectOfNodes, getNodesInside, getConnectedEdges } from '../utils/graph';
 import { getHandleBounds } from '../components/Nodes/utils';
@@ -194,9 +194,9 @@ const createStore = () =>
         if (matchingNodes?.length) {
           onNodesChange(
             matchingNodes.map((n) => {
-              const change: NodePositionChange = {
+              const change: NodeDimensionChange = {
                 id: n.id,
-                type: 'position',
+                type: 'dimensions',
                 isDragging: !!isDragging,
               };
 

src/style.css

@@ -95,6 +95,7 @@
   user-select: none;
   pointer-events: all;
   transform-origin: 0 0;
+  box-sizing: border-box;
 }
 
 .react-flow__nodesselection {

src/types/index.ts

@@ -12,15 +12,12 @@ export type Transform = [number, number, number];
 export type NodeDimensionChange = {
   id: string;
   type: 'dimensions';
-  dimensions: Dimensions;
-  handleBounds?: NodeHandleBounds;
-};
-export type NodePositionChange = {
-  id: string;
-  type: 'position';
+  dimensions?: Dimensions;
   position?: XYPosition;
+  handleBounds?: NodeHandleBounds;
   isDragging?: boolean;
 };
+
 export type NodeSelectionChange = {
   id: string;
   type: 'select';
@@ -30,7 +27,7 @@ export type NodeRemoveChange = {
   id: string;
   type: 'remove';
 };
-export type NodeChange = NodeDimensionChange | NodePositionChange | NodeSelectionChange | NodeRemoveChange;
+export type NodeChange = NodeDimensionChange | NodeSelectionChange | NodeRemoveChange;
 
 export type EdgeSelectionChange = NodeSelectionChange;
 export type EdgeRemoveChange = NodeRemoveChange;
@@ -277,6 +274,8 @@ export interface WrapNodeProps<T = any> {
   scale: number;
   xPos: number;
   yPos: number;
+  width?: number | null;
+  height?: number | null;
   isSelectable: boolean;
   isDraggable: boolean;
   isConnectable: boolean;
@@ -302,6 +301,7 @@ export interface WrapNodeProps<T = any> {
   resizeObserver: ResizeObserver | null;
   dragHandle?: string;
   zIndex: number;
+  isParentNode: boolean;
 }
 
 export type FitViewParams = {

src/utils/graph.ts

@@ -301,17 +301,22 @@ function applyChanges(changes: NodeChange[] | EdgeChange[], elements: any[]): an
 
     if (currentChange) {
       switch (currentChange.type) {
-        case 'dimensions': {
-          res.push({ ...item, ...currentChange.dimensions, handleBounds: currentChange.handleBounds });
-          return res;
-        }
         case 'select': {
           res.push({ ...item, isSelected: currentChange.isSelected });
           return res;
         }
-        case 'position': {
+        case 'dimensions': {
           const updateItem = { ...item };
 
+          if (typeof currentChange.dimensions !== 'undefined') {
+            updateItem.width = currentChange.dimensions.width;
+            updateItem.height = currentChange.dimensions.height;
+          }
+
+          if (typeof currentChange.handleBounds !== 'undefined') {
+            updateItem.handleBounds = currentChange.handleBounds;
+          }
+
           if (typeof currentChange.position !== 'undefined') {
             updateItem.position = currentChange.position;
           }