feat(edges): add smooth step type

example/src/Overview/index.js

@@ -2,49 +2,118 @@ import React, { useState } from 'react';
 
 import ReactFlow, { removeElements, addEdge, MiniMap, Controls, Background } from 'react-flow-renderer';
 
-const onNodeDragStart = node => console.log('drag start', node);
-const onNodeDragStop = node => console.log('drag stop', node);
-const onElementClick = element => console.log('click', element);
-const onSelectionChange = elements => console.log('selection change', elements);
+const onNodeDragStart = (node) => console.log('drag start', node);
+const onNodeDragStop = (node) => console.log('drag stop', node);
+const onElementClick = (element) => console.log('click', element);
+const onSelectionChange = (elements) => console.log('selection change', elements);
 const onLoad = (reactFlowInstance) => {
   console.log('graph loaded:', reactFlowInstance);
   reactFlowInstance.fitView();
 };
 
 const initialElements = [
-  { id: '1', type: 'input', data: { label: <>Welcome to <strong>React Flow!</strong></> }, position: { x: 250, y: 0 } },
-  { id: '2', data: { label: <>This is a <strong>default node</strong></> }, position: { x: 100, y: 100 } },
   {
-    id: '3', data: { label: <>This one has a <strong>custom style</strong></> }, position: { x: 400, y: 100 },
+    id: '1',
+    type: 'input',
+    data: {
+      label: (
+        <>
+          Welcome to <strong>React Flow!</strong>
+        </>
+      ),
+    },
+    position: { x: 250, y: 0 },
+  },
+  {
+    id: '2',
+    data: {
+      label: (
+        <>
+          This is a <strong>default node</strong>
+        </>
+      ),
+    },
+    position: { x: 100, y: 100 },
+  },
+  {
+    id: '3',
+    data: {
+      label: (
+        <>
+          This one has a <strong>custom style</strong>
+        </>
+      ),
+    },
+    position: { x: 400, y: 100 },
     style: { background: '#eee', color: '#222', border: '1px solid #bbb', width: 180 },
   },
   {
-    id: '4', position: { x: 250, y: 200 },
-    data: { label: <>You can find the docs on <a href="https://github.com/wbkd/react-flow" target="_blank" rel="noopener noreferrer">Github</a></> }
+    id: '4',
+    position: { x: 250, y: 200 },
+    data: {
+      label: (
+        <>
+          You can find the docs on{' '}
+          <a href="https://github.com/wbkd/react-flow" target="_blank" rel="noopener noreferrer">
+            Github
+          </a>
+        </>
+      ),
+    },
+  },
+  {
+    id: '5',
+    data: {
+      label: (
+        <>
+          Or check out the other <strong>examples</strong>
+        </>
+      ),
+    },
+    position: { x: 250, y: 300 },
+  },
+  {
+    id: '6',
+    type: 'output',
+    data: {
+      label: (
+        <>
+          An <strong>output node</strong>
+        </>
+      ),
+    },
+    position: { x: 100, y: 480 },
   },
-  { id: '5', data: { label: <>Or check out the other <strong>examples</strong></> }, position: { x: 250, y: 300 } },
-  { id: '6', type: 'output', data: { label: <>An <strong>output node</strong></> }, position: { x: 100, y: 450 } },
   { id: '7', type: 'output', data: { label: 'Another output node' }, position: { x: 400, y: 450 } },
   { id: 'e1-2', source: '1', target: '2', label: 'this is an edge label' },
   { id: 'e1-3', source: '1', target: '3' },
   { id: 'e3-4', source: '3', target: '4', animated: true, label: 'animated edge' },
-  { id: 'e4-5', source: '4', target: '5', },
-  { id: 'e5-6', source: '5', target: '6', },
-  { id: 'e5-7', source: '5', target: '7', type: 'step', label: 'a step edge', labelStyle: { fill: 'red', fontWeight: 700 } },
+  { id: 'e4-5', source: '4', target: '5' },
+  { id: 'e5-6', source: '5', target: '6', type: 'smoothstep', label: 'smooth step edge' },
+  {
+    id: 'e5-7',
+    source: '5',
+    target: '7',
+    type: 'step',
+    label: 'a step edge',
+    labelStyle: { fill: 'red', fontWeight: 700 },
+  },
 ];
 
 const OverviewFlow = () => {
   const [elements, setElements] = useState(initialElements);
 
   const addRandomNode = () => {
-    setElements(els => els.concat({
-      id: (els.length + 1).toString(),
-      data: { label: 'Added node' },
-      position: { x: Math.random() * window.innerWidth, y: Math.random() * window.innerHeight }
-    }));
+    setElements((els) =>
+      els.concat({
+        id: (els.length + 1).toString(),
+        data: { label: 'Added node' },
+        position: { x: Math.random() * window.innerWidth, y: Math.random() * window.innerHeight },
+      })
+    );
   };
-  const onElementsRemove = (elementsToRemove) => setElements(els => removeElements(elementsToRemove, els));
-  const onConnect = (params) => setElements(els => addEdge(params, els));
+  const onElementsRemove = (elementsToRemove) => setElements((els) => removeElements(elementsToRemove, els));
+  const onConnect = (params) => setElements((els) => addEdge(params, els));
 
   return (
     <ReactFlow
@@ -63,7 +132,7 @@ const OverviewFlow = () => {
       snapGrid={[16, 16]}
     >
       <MiniMap
-        nodeColor={n => {
+        nodeColor={(n) => {
           if (n.type === 'input') return 'blue';
           if (n.type === 'output') return 'green';
           if (n.type === 'default') return 'red';
@@ -72,10 +141,7 @@ const OverviewFlow = () => {
         }}
       />
       <Controls />
-      <Background
-        color="#888"
-        gap={16}
-      />
+      <Background color="#888" gap={16} />
 
       <button
         type="button"
@@ -87,6 +153,6 @@ const OverviewFlow = () => {
       </button>
     </ReactFlow>
   );
-}
+};
 
-export default OverviewFlow;
+export default OverviewFlow;