fix(nested): add nested nodes example, always show nodes on top while dragging or selected

2021-11-05 17:42:18 +01:00
parent fdf2571402
commit 1425a4363b
3 changed files with 201 additions and 8 deletions
@@ -0,0 +1,186 @@
+import { useState, MouseEvent, useCallback } from 'react';
+
+import ReactFlow, {
+  addEdge,
+  Background,
+  applyNodeChanges,
+  applyEdgeChanges,
+  MiniMap,
+  Controls,
+  Node,
+  Edge,
+  NodeChange,
+  EdgeChange,
+  OnLoadParams,
+  Connection,
+} from 'react-flow-renderer';
+
+const onNodeDragStop = (_: MouseEvent, node: Node) => console.log('drag stop', node);
+const onNodeClick = (_: MouseEvent, node: Node) => console.log('click', node);
+const onEdgeClick = (_: MouseEvent, edge: Edge) => console.log('click', edge);
+
+const initialNodes: 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',
+    style: { backgroundColor: 'rgba(255, 0, 0, 0.8)', width: 200, height: 200 },
+  },
+  {
+    id: '2a',
+    data: { label: 'Node 2a' },
+    position: { x: 10, y: 50 },
+    parentNode: '2',
+  },
+  { id: '3', data: { label: 'Node 3' }, position: { x: 320, y: 100 }, className: 'light' },
+  {
+    id: '4',
+    data: { label: 'Node 4' },
+    position: { x: 320, y: 200 },
+    className: 'light',
+    style: { backgroundColor: 'rgba(255, 0, 0, 0.7)', width: 300, height: 300 },
+  },
+  {
+    id: '4a',
+    data: { label: 'Node 4a' },
+    position: { x: 15, y: 65 },
+    className: 'light',
+    parentNode: '4',
+    extent: 'parent',
+  },
+  {
+    id: '4b',
+    data: { label: 'Node 4b' },
+    position: { x: 15, y: 120 },
+    className: 'light',
+    style: { backgroundColor: 'rgba(255, 0, 255, 0.7)', height: 150, width: 270 },
+    parentNode: '4',
+  },
+  {
+    id: '4b1',
+    data: { label: 'Node 4b1' },
+    position: { x: 20, y: 40 },
+    className: 'light',
+    parentNode: '4b',
+  },
+  {
+    id: '4b2',
+    data: { label: 'Node 4b2' },
+    position: { x: 100, y: 100 },
+    className: 'light',
+    parentNode: '4b',
+  },
+];
+
+const initialEdges: Edge[] = [
+  { id: 'e1-2', source: '1', target: '2', animated: true },
+  { id: 'e1-3', source: '1', target: '3' },
+  { id: 'e2a-4a', source: '2a', target: '4a' },
+  { id: 'e3-4', source: '3', target: '4' },
+  { id: 'e3-4b', source: '3', target: '4b' },
+  { id: 'e4a-4b1', source: '4a', target: '4b1' },
+  { id: 'e4a-4b2', source: '4a', target: '4b2' },
+  { id: 'e4b1-4b2', source: '4b1', target: '4b2' },
+];
+
+function shuffle() {
+  return Math.random() - Math.random();
+}
+
+const NestedFlow = () => {
+  const [rfInstance, setRfInstance] = useState<OnLoadParams | null>(null);
+  const [nodes, setNodes] = useState<Node[]>(initialNodes);
+  const [edges, setEdges] = useState<Edge[]>(initialEdges);
+
+  const onConnect = useCallback((params: Edge | Connection) => {
+    setEdges((eds) => {
+      return addEdge(params, eds);
+    });
+  }, []);
+  const onLoad = useCallback((reactFlowInstance: OnLoadParams) => setRfInstance(reactFlowInstance), []);
+
+  const updatePos = () => {
+    setNodes((nds) => {
+      return nds.map((n) => {
+        n.position = {
+          x: Math.random() * 400,
+          y: Math.random() * 400,
+        };
+
+        return n;
+      });
+    });
+  };
+
+  const logToObject = () => console.log(rfInstance?.toObject());
+  const resetTransform = () => rfInstance?.setTransform({ x: 0, y: 0, zoom: 1 });
+
+  const toggleClassnames = () => {
+    setNodes((nds) => {
+      return nds.map((n) => {
+        n.className = n.className === 'light' ? 'dark' : 'light';
+        return n;
+      });
+    });
+  };
+
+  const toggleChildNodes = () => {
+    setNodes((nds) => {
+      return nds.map((n) => {
+        n.isHidden = !!n.parentNode && !n.isHidden;
+        return n;
+      });
+    });
+  };
+
+  const onNodesChange = useCallback((changes: NodeChange[]) => {
+    setNodes((ns) => applyNodeChanges(changes, ns));
+  }, []);
+
+  const onEdgesChange = useCallback((changes: EdgeChange[]) => {
+    setEdges((es) => applyEdgeChanges(changes, es));
+  }, []);
+
+  return (
+    <ReactFlow
+      nodes={nodes}
+      edges={edges}
+      onLoad={onLoad}
+      onNodesChange={onNodesChange}
+      onEdgesChange={onEdgesChange}
+      onNodeClick={onNodeClick}
+      onEdgeClick={onEdgeClick}
+      onConnect={onConnect}
+      onNodeDragStop={onNodeDragStop}
+      className="react-flow-basic-example"
+      defaultZoom={1.5}
+      minZoom={0.2}
+      maxZoom={4}
+      onlyRenderVisibleElements={false}
+    >
+      <MiniMap />
+      <Controls />
+      <Background />
+
+      <div style={{ position: 'absolute', right: 10, top: 10, zIndex: 4 }}>
+        <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={logToObject}>toObject</button>
+      </div>
+    </ReactFlow>
+  );
+};
+
+export default NestedFlow;