chore(examples): add old api examples

2021-10-20 10:23:09 +02:00
parent 1525af39cf
commit f957462eb6
50 changed files with 3122 additions and 10 deletions
@@ -0,0 +1,75 @@
+import React, { useState, DragEvent } from 'react';
+import ReactFlow, {
+  ReactFlowProvider,
+  addEdge,
+  removeElements,
+  Controls,
+  OnLoadParams,
+  Elements,
+  Connection,
+  Edge,
+  ElementId,
+  Node,
+} from 'react-flow-renderer';
+
+import Sidebar from './Sidebar';
+
+import './dnd.css';
+
+const initialElements = [{ id: '1', type: 'input', data: { label: 'input node' }, position: { x: 250, y: 5 } }];
+
+const onDragOver = (event: DragEvent) => {
+  event.preventDefault();
+  event.dataTransfer.dropEffect = 'move';
+};
+
+let id = 0;
+const getId = (): ElementId => `dndnode_${id++}`;
+
+const DnDFlow = () => {
+  const [reactFlowInstance, setReactFlowInstance] = useState<OnLoadParams>();
+  const [elements, setElements] = useState<Elements>(initialElements);
+
+  const onConnect = (params: Connection | Edge) => setElements((els) => addEdge(params, els));
+  const onElementsRemove = (elementsToRemove: Elements) => setElements((els) => removeElements(elementsToRemove, els));
+  const onLoad = (_reactFlowInstance: OnLoadParams) => setReactFlowInstance(_reactFlowInstance);
+
+  const onDrop = (event: DragEvent) => {
+    event.preventDefault();
+
+    if (reactFlowInstance) {
+      const type = event.dataTransfer.getData('application/reactflow');
+      const position = reactFlowInstance.project({ x: event.clientX, y: event.clientY - 40 });
+      const newNode: Node = {
+        id: getId(),
+        type,
+        position,
+        data: { label: `${type} node` },
+      };
+
+      setElements((es) => es.concat(newNode));
+    }
+  };
+
+  return (
+    <div className="dndflow">
+      <ReactFlowProvider>
+        <div className="reactflow-wrapper">
+          <ReactFlow
+            elements={elements}
+            onConnect={onConnect}
+            onElementsRemove={onElementsRemove}
+            onLoad={onLoad}
+            onDrop={onDrop}
+            onDragOver={onDragOver}
+          >
+            <Controls />
+          </ReactFlow>
+        </div>
+        <Sidebar />
+      </ReactFlowProvider>
+    </div>
+  );
+};
+
+export default DnDFlow;