Merge pull request #330 from wbkd/develop

Develop

README.md

@@ -69,6 +69,10 @@ const BasicFlow = () => <ReactFlow elements={elements} />;
 - `onElementsRemove(elements: Elements)`: element remove callback
 - `onNodeDragStart(node: Node)`: node drag start callback
 - `onNodeDragStop(node: Node)`: node drag stop callback
+- `onNodeMouseEnter(evt: MouseEvent, node: Node)`: node mouse enter callback
+- `onNodeMouseMove(evt: MouseEvent, node: Node)`: node mouse move callback
+- `onNodeMouseLeave(evt: MouseEvent, node: Node)`: node mouse leave callback
+- `onNodeContextMenu(evt: MouseEvent, node: Node)`: node context menu callback
 - `onConnect({ source, target })`: connect callback
 - `onLoad(reactFlowInstance)`: editor load callback
 - `onMove()`: move callback
@@ -77,14 +81,16 @@ const BasicFlow = () => <ReactFlow elements={elements} />;
 - `edgeTypes`: object with [edge types](#edge-types--custom-edges)
 - `style`: css properties
 - `className`: additional class name
-- `connectionLineType`: connection line type = `straight` or `bezier`
+- `connectionLineType`: connection line type = `default` (bezier), `straight`, `step`, `smoothstep`
 - `connectionLineStyle`: connection style as svg attributes
 - `deleteKeyCode`: default: `8` (delete)
 - `selectionKeyCode`: default: `16` (shift)
 - `snapToGrid`: default: `false`
 - `snapGrid`: [x, y] array - default: `[16, 16]`
 - `onlyRenderVisibleNodes`: default: `true`
-- `isInteractive`: default: `true`. If the graph is not interactive you can't drag any nodes
+- `nodesDraggable`: default: `true`
+- `nodesConnectable`: default: `true`
+- `elementsSelectable`: default: `true`
 - `selectNodesOnDrag`: default: `true`
 - `minZoom`: default: `0.5`
 - `maxZoom`: default: `2`
@@ -223,7 +229,7 @@ You can find an example of how to implement a custom node with multiple handles
 
 # Edges
 
-React Flow comes with three [edge types](#edge-types--custom-edges) (`straight`, `default`, `step`). As the names indicate, the edges differ in the representation. The default type is a bezier edge. You create edges by adding them to your `elements` array of the `ReactFlow` component.
+React Flow comes with three [edge types](#edge-types--custom-edges) (`default`, `straight`, `step`, `smoothstep`). As the names indicate, the edges differ in the representation. The default type is a bezier edge. You create edges by adding them to your `elements` array of the `ReactFlow` component.
 
 Edge example: `{ id: 'e1-2', type: 'straight', source: '1', target: '2', animated: true, label: 'edge label' }`
 
@@ -246,13 +252,14 @@ You can find an example with lots of different edges in the [edges example](http
 
 ### Edge Types & Custom Edges
 
-The basic edge types are `straight`, `default` and `step`. The default `edgeTypes` object looks like this:
+The basic edge types are `default` (bezier), `straight`, `step` and `smoothedge`. The default `edgeTypes` object looks like this:
 
 ```javascript
 {
   default: BezierEdge,
   straight: StraightEdge,
-  step: StepEdge
+  step: StepEdge,
+  smoothstep: SmoothStepEdge
 }
 ```
 
@@ -506,7 +513,7 @@ You can find all examples in the [example](example) folder or check out the live
 - [provider](https://react-flow.netlify.app/provider)
 - [edges](https://react-flow.netlify.app/edges)
 - [empty](https://react-flow.netlify.app/empty)
-- [inactive](https://react-flow.netlify.app/inactive)
+- [interaction](https://react-flow.netlify.app/interaction)
 - [provider](https://react-flow.netlify.app/provider)
 
 # Development

cypress/integration/flow/inactive.spec.js

@@ -1,6 +1,6 @@
-describe('Inactive Graph Rendering', () => {
+describe('Interaction Graph Rendering', () => {
   it('renders a graph', () => {
-    cy.visit('/inactive');
+    cy.visit('/interaction');
 
     cy.get('.react-flow__renderer');
     cy.get('.react-flow__node').should('have.length', 4);
@@ -20,12 +20,24 @@ describe('Inactive Graph Rendering', () => {
 
   it('tries to do a selection', () => {
     cy.get('body').type('{shift}', { release: false }).get('.react-flow__selectionpane').should('not.exist');
-
     cy.get('body').type('{shift}', { release: true });
   });
 
-  it('toggles interactive mode', () => {
+  it('toggles draggable mode', () => {
-    cy.get('.react-flow__interactive').click();
+    cy.get('.react-flow__draggable').click();
+  });
+
+  it('drags a node', () => {
+    const styleBeforeDrag = Cypress.$('.react-flow__node:first').css('transform');
+
+    cy.drag('.react-flow__node:first', { x: 325, y: 100 }).then(($el) => {
+      const styleAfterDrag = $el.css('transform');
+      expect(styleBeforeDrag).to.not.equal(styleAfterDrag);
+    });
+  });
+
+  it('toggles selectable mode', () => {
+    cy.get('.react-flow__selectable').click();
   });
 
   it('selects a node by click', () => {

example/src/CustomNode/index.js

@@ -4,9 +4,9 @@ import ReactFlow, { isEdge, removeElements, addEdge, MiniMap, Controls } from 'r
 
 import ColorSelectorNode from './ColorSelectorNode';
 
-const onNodeDragStop = node => console.log('drag stop', node);
+const onNodeDragStop = (node) => console.log('drag stop', node);
-const onElementClick = element => console.log('click', element);
+const onElementClick = (element) => console.log('click', element);
-const onLoad = reactFlowInstance => console.log('graph loaded:', reactFlowInstance);
+const onLoad = (reactFlowInstance) => console.log('graph loaded:', reactFlowInstance);
 
 const initBgColor = '#f0e742';
 
@@ -16,39 +16,47 @@ const CustomNodeFlow = () => {
 
   useEffect(() => {
     const onChange = (evt) => {
-      setElements(els => els.map(e => {
+      setElements((els) =>
-        if (isEdge(e) || e.id !== '2') {
+        els.map((e) => {
-          return e;
+          if (isEdge(e) || e.id !== '2') {
-        }
+            return e;
-
-        const color = evt.target.value;
-
-        setBgColor(color);
-
-        return {
-          ...e,
-          data: {
-            ...e.data,
-            color
           }
-        };
+
-      }));
+          const color = evt.target.value;
+
+          setBgColor(color);
+
+          return {
+            ...e,
+            data: {
+              ...e.data,
+              color,
+            },
+          };
+        })
+      );
     };
 
     setElements([
       { id: '1', type: 'input', data: { label: 'An input node' }, position: { x: 0, y: 50 }, sourcePosition: 'right' },
-      { id: '2', type: 'selectorNode', data: { onChange: onChange, color: initBgColor }, style: { border: '1px solid #777', padding: 10 }, position: { x: 250, y: 50 } },
+      {
+        id: '2',
+        type: 'selectorNode',
+        data: { onChange: onChange, color: initBgColor },
+        style: { border: '1px solid #777', padding: 10 },
+        position: { x: 250, y: 50 },
+      },
       { id: '3', type: 'output', data: { label: 'Output A' }, position: { x: 550, y: 25 }, targetPosition: 'left' },
       { id: '4', type: 'output', data: { label: 'Output B' }, position: { x: 550, y: 100 }, targetPosition: 'left' },
 
       { id: 'e1-2', source: '1', target: '2', animated: true, style: { stroke: '#fff' } },
       { id: 'e2a-3', source: '2__a', target: '3', animated: true, style: { stroke: '#fff' } },
       { id: 'e2b-4', source: '2__b', target: '4', animated: true, style: { stroke: '#fff' } },
-    ])
+    ]);
   }, []);
 
-  const onElementsRemove = (elementsToRemove) => setElements(els => removeElements(elementsToRemove, els));
+  const onElementsRemove = (elementsToRemove) => setElements((els) => removeElements(elementsToRemove, els));
-  const onConnect = (params) => setElements(els => addEdge(params, els));
+  const onConnect = (params) => setElements((els) => addEdge(params, els));
 
   return (
     <ReactFlow
@@ -63,12 +71,11 @@ const CustomNodeFlow = () => {
         selectorNode: ColorSelectorNode,
       }}
       connectionLineStyle={{ stroke: '#ddd', strokeWidth: 2 }}
-      connectionLineType="bezier"
       snapToGrid={true}
       snapGrid={[16, 16]}
     >
       <MiniMap
-        nodeColor={n => {
+        nodeColor={(n) => {
           if (n.type === 'input') return 'blue';
           if (n.type === 'selectorNode') return bgColor;
           if (n.type === 'output') return 'green';
@@ -77,6 +84,6 @@ const CustomNodeFlow = () => {
       <Controls />
     </ReactFlow>
   );
-}
+};
 
 export default CustomNodeFlow;

example/src/Edges/index.js

@@ -4,13 +4,14 @@ import ReactFlow, { removeElements, addEdge, MiniMap, Controls, Background } fro
 
 import CustomEdge from './CustomEdge';
 
-const onNodeDragStop = node => console.log('drag stop', node);
+const onNodeDragStop = (node) => console.log('drag stop', node);
-const onElementClick = element => console.log('click', element);
+const onElementClick = (element) => console.log('click', element);
-const onLoad = reactFlowInstance => reactFlowInstance.fitView();
+const onLoad = (reactFlowInstance) => reactFlowInstance.fitView();
 
 const initialElements = [
   { id: '1', type: 'input', data: { label: 'Input 1' }, position: { x: 250, y: 0 } },
   { id: '2', data: { label: 'Node 2' }, position: { x: 150, y: 100 } },
+  { id: '2a', data: { label: 'Node 2a' }, position: { x: 0, y: 180 } },
   { id: '3', data: { label: 'Node 3' }, position: { x: 250, y: 200 } },
   { id: '4', data: { label: 'Node 4' }, position: { x: 400, y: 300 } },
   { id: '3a', data: { label: 'Node 3a' }, position: { x: 150, y: 300 } },
@@ -19,20 +20,27 @@ const initialElements = [
   { id: '7', type: 'output', data: { label: 'Output 7' }, position: { x: 250, y: 550 } },
   { id: '8', type: 'output', data: { label: 'Output 8' }, position: { x: 525, y: 600 } },
   { id: 'e1-2', source: '1', target: '2', label: 'bezier edge (default)' },
+  { id: 'e2-2a', source: '2', target: '2a', type: 'smoothstep', label: 'smoothstep edge' },
   { id: 'e2-3', source: '2', target: '3', type: 'step', label: 'step edge' },
   { id: 'e3-4', source: '3', target: '4', type: 'straight', label: 'straight edge' },
   { id: 'e3-3a', source: '3', target: '3a', type: 'straight', label: 'label only edge', style: { stroke: 'none' } },
   { id: 'e3-5', source: '4', target: '5', animated: true, label: 'animated styled edge', style: { stroke: 'red' } },
   { id: 'e5-6', source: '5', target: '6', label: 'styled label', labelStyle: { fill: 'red', fontWeight: 700 } },
-  { id: 'e5-7', source: '5', target: '7', label: 'label with styled bg', labelBgStyle: { fill: '#eee', fillOpacity: 0.7 } },
+  {
+    id: 'e5-7',
+    source: '5',
+    target: '7',
+    label: 'label with styled bg',
+    labelBgStyle: { fill: '#eee', fillOpacity: 0.7 },
+  },
   { id: 'e5-8', source: '5', target: '8', type: 'custom', label: 'custom edge' },
 ];
 
 const EdgesFlow = () => {
   const [elements, setElements] = useState(initialElements);
 
-  const onElementsRemove = (elementsToRemove) => setElements(els => removeElements(elementsToRemove, els));
+  const onElementsRemove = (elementsToRemove) => setElements((els) => removeElements(elementsToRemove, els));
-  const onConnect = (params) => setElements(els => addEdge(params, els));
+  const onConnect = (params) => setElements((els) => addEdge(params, els));
 
   return (
     <ReactFlow
@@ -45,7 +53,7 @@ const EdgesFlow = () => {
       onLoad={onLoad}
       snapToGrid={true}
       edgeTypes={{
-        custom: CustomEdge
+        custom: CustomEdge,
       }}
     >
       <MiniMap />
@@ -53,6 +61,6 @@ const EdgesFlow = () => {
       <Background />
     </ReactFlow>
   );
-}
+};
 
 export default EdgesFlow;

example/src/Horizontal/index.js

@@ -2,10 +2,25 @@ import React, { useState } from 'react';
 
 import ReactFlow, { removeElements, addEdge } from 'react-flow-renderer';
 
-const onLoad = reactFlowInstance => reactFlowInstance.fitView();
+const onLoad = (reactFlowInstance) => reactFlowInstance.fitView();
+
+const onNodeMouseEnter = (evt, node) => console.log('mouse enter:', node);
+const onNodeMouseMove = (evt, node) => console.log('mouse move:', node);
+const onNodeMouseLeave = (evt, node) => console.log('mouse leave:', node);
+const onNodeContextMenu = (evt, node) => {
+  evt.preventDefault();
+  console.log('context menu:', node);
+};
 
 const initialElements = [
-  { id: '1', sourcePosition: 'right', type: 'input', className: 'dark-node', data: { label: 'Input' }, position: { x: 0, y: 80 } },
+  {
+    id: '1',
+    sourcePosition: 'right',
+    type: 'input',
+    className: 'dark-node',
+    data: { label: 'Input' },
+    position: { x: 0, y: 80 },
+  },
   { id: '2', sourcePosition: 'right', targetPosition: 'left', data: { label: 'A Node' }, position: { x: 250, y: 0 } },
   { id: '3', sourcePosition: 'right', targetPosition: 'left', data: { label: 'Node 3' }, position: { x: 250, y: 160 } },
   { id: '4', sourcePosition: 'right', targetPosition: 'left', data: { label: 'Node 4' }, position: { x: 500, y: 0 } },
@@ -14,29 +29,30 @@ const initialElements = [
   { id: '7', sourcePosition: 'right', targetPosition: 'left', data: { label: 'Node 7' }, position: { x: 750, y: 50 } },
   { id: '8', sourcePosition: 'right', targetPosition: 'left', data: { label: 'Node 8' }, position: { x: 750, y: 300 } },
 
-  { id: 'e1-2', source: '1', target: '2', animated: true,  },
+  { id: 'e1-2', source: '1', type: 'smoothstep', target: '2', animated: true },
-  { id: 'e1-3', source: '1', target: '3', animated: true, },
+  { id: 'e1-3', source: '1', type: 'smoothstep', target: '3', animated: true },
-  { id: 'e1-4', source: '2', target: '4', label: 'edge label' },
+  { id: 'e1-4', source: '2', type: 'smoothstep', target: '4', label: 'edge label' },
-  { id: 'e3-5', source: '3', target: '5', animated: true },
+  { id: 'e3-5', source: '3', type: 'smoothstep', target: '5', animated: true },
-  { id: 'e3-6', source: '3', target: '6', animated: true },
+  { id: 'e3-6', source: '3', type: 'smoothstep', target: '6', animated: true },
-  { id: 'e5-7', source: '5', target: '7', animated: true },
+  { id: 'e5-7', source: '5', type: 'smoothstep', target: '7', animated: true },
-  { id: 'e6-8', source: '6', target: '8', animated: true },
+  { id: 'e6-8', source: '6', type: 'smoothstep', target: '8', animated: true },
 ];
 
 const HorizontalFlow = () => {
   const [elements, setElements] = useState(initialElements);
-  const onElementsRemove = (elementsToRemove) =>
+  const onElementsRemove = (elementsToRemove) => setElements((els) => removeElements(elementsToRemove, els));
-    setElements(els => removeElements(elementsToRemove, els));
+  const onConnect = (params) => setElements((els) => addEdge(params, els));
-  const onConnect = (params) => setElements(els => addEdge(params, els));
   const changeClassName = () => {
-    setElements(elms => elms.map(el => {
+    setElements((elms) =>
-      if (el.type === 'input') {
+      elms.map((el) => {
-        el.className = el.className ? '' : 'dark-node';
+        if (el.type === 'input') {
-      }
+          el.className = el.className ? '' : 'dark-node';
+        }
 
-      return {...el};
+        return { ...el };
-    }))
+      })
-  }
+    );
+  };
 
   return (
     <ReactFlow
@@ -45,15 +61,16 @@ const HorizontalFlow = () => {
       onConnect={onConnect}
       onLoad={onLoad}
       selectNodesOnDrag={false}
+      onNodeMouseEnter={onNodeMouseEnter}
+      onNodeMouseMove={onNodeMouseMove}
+      onNodeMouseLeave={onNodeMouseLeave}
+      onNodeContextMenu={onNodeContextMenu}
     >
-      <button
+      <button onClick={changeClassName} style={{ position: 'absolute', right: 10, top: 30, zIndex: 4 }}>
-        onClick={changeClassName}
-        style={{ position: 'absolute', right: 10, top: 30, zIndex: 4 }}
-      >
         change class name
       </button>
     </ReactFlow>
   );
-}
+};
 
 export default HorizontalFlow;

example/src/Inactive/index.js

@@ -1,45 +0,0 @@
-import React, { useState } from 'react';
-
-import ReactFlow, { MiniMap, Controls } from 'react-flow-renderer';
-
-const initialElements = [
-  { id: '1', type: 'input', data: { label: 'Node 1' }, position: { x: 250, y: 5 } },
-  { id: '2', data: { label: 'Node 2' }, position: { x: 100, y: 100 } },
-  { id: '3', data: { label: 'Node 3' }, position: { x: 400, y: 100 } },
-  { id: '4', data: { label: 'Node 4' }, position: { x: 400, y: 200 } },
-  { id: 'e1-2', source: '1', target: '2', animated: true },
-  { id: 'e1-3', source: '1', target: '3' },
-];
-
-const InactiveFlow = () => {
-  const [isInteractive, setIsInteractive] = useState(false);
-  const onToggleInteractive = (evt) => {
-    setIsInteractive(evt.target.checked);
-  };
-
-  return (
-    <ReactFlow
-      elements={initialElements}
-      isInteractive={isInteractive}
-    >
-      <MiniMap />
-      <Controls />
-
-      <div
-        style={{ position: 'absolute', left: 10, top: 10, zIndex: 4 }}
-      >
-        <label>
-          interactive
-          <input
-            type="checkbox"
-            checked={isInteractive}
-            onChange={onToggleInteractive}
-            className="react-flow__interactive"
-          />
-        </label>
-      </div>
-    </ReactFlow>
-  );
-}
-
-export default InactiveFlow;

example/src/Interaction/index.js

@@ -0,0 +1,75 @@
+import React, { useState } from 'react';
+
+import ReactFlow, { addEdge, MiniMap, Controls } from 'react-flow-renderer';
+
+const initialElements = [
+  { id: '1', type: 'input', data: { label: 'Node 1' }, position: { x: 250, y: 5 } },
+  { id: '2', data: { label: 'Node 2' }, position: { x: 100, y: 100 } },
+  { id: '3', data: { label: 'Node 3' }, position: { x: 400, y: 100 } },
+  { id: '4', data: { label: 'Node 4' }, position: { x: 400, y: 200 } },
+  { id: 'e1-2', source: '1', target: '2', animated: true },
+  { id: 'e1-3', source: '1', target: '3' },
+];
+
+const InteractionFlow = () => {
+  const [elements, setElements] = useState(initialElements);
+  const onConnect = (params) => setElements((els) => addEdge(params, els));
+
+  const [isSelectable, setIsSelectable] = useState(false);
+  const [isDraggable, setIsDraggable] = useState(false);
+  const [isConnectable, setIsConnectable] = useState(false);
+
+  return (
+    <ReactFlow
+      elements={elements}
+      elementsSelectable={isSelectable}
+      nodesConnectable={isConnectable}
+      nodesDraggable={isDraggable}
+      onConnect={onConnect}
+    >
+      <MiniMap />
+      <Controls />
+
+      <div style={{ position: 'absolute', left: 10, top: 10, zIndex: 4 }}>
+        <div>
+          <label htmlFor="draggable">
+            draggable
+            <input
+              id="draggable"
+              type="checkbox"
+              checked={isDraggable}
+              onChange={(evt) => setIsDraggable(evt.target.checked)}
+              className="react-flow__draggable"
+            />
+          </label>
+        </div>
+        <div>
+          <label htmlFor="connectable">
+            connectable
+            <input
+              id="connectable"
+              type="checkbox"
+              checked={isConnectable}
+              onChange={(evt) => setIsConnectable(evt.target.checked)}
+              className="react-flow__connectable"
+            />
+          </label>
+        </div>
+        <div>
+          <label htmlFor="selectable">
+            selectable
+            <input
+              id="selectable"
+              type="checkbox"
+              checked={isSelectable}
+              onChange={(evt) => setIsSelectable(evt.target.checked)}
+              className="react-flow__selectable"
+            />
+          </label>
+        </div>
+      </div>
+    </ReactFlow>
+  );
+};
+
+export default InteractionFlow;

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 onNodeDragStart = (node) => console.log('drag start', node);
-const onNodeDragStop = node => console.log('drag stop', node);
+const onNodeDragStop = (node) => console.log('drag stop', node);
-const onElementClick = element => console.log('click', element);
+const onElementClick = (element) => console.log('click', element);
-const onSelectionChange = elements => console.log('selection change', elements);
+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 },
+    id: '4',
-    data: { label: <>You can find the docs on <a href="https://github.com/wbkd/react-flow" target="_blank" rel="noopener noreferrer">Github</a></> }
+    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: 'e4-5', source: '4', target: '5' },
-  { id: 'e5-6', source: '5', target: '6', },
+  { 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 } },
+  {
+    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({
+    setElements((els) =>
-      id: (els.length + 1).toString(),
+      els.concat({
-      data: { label: 'Added node' },
+        id: (els.length + 1).toString(),
-      position: { x: Math.random() * window.innerWidth, y: Math.random() * window.innerHeight }
+        data: { label: 'Added node' },
-    }));
+        position: { x: Math.random() * window.innerWidth, y: Math.random() * window.innerHeight },
+      })
+    );
   };
-  const onElementsRemove = (elementsToRemove) => setElements(els => removeElements(elementsToRemove, els));
+  const onElementsRemove = (elementsToRemove) => setElements((els) => removeElements(elementsToRemove, els));
-  const onConnect = (params) => setElements(els => addEdge(params, els));
+  const onConnect = (params) => setElements((els) => addEdge(params, els));
 
   return (
     <ReactFlow
@@ -58,12 +127,11 @@ const OverviewFlow = () => {
       style={{ width: '100%', height: '100%' }}
       onLoad={onLoad}
       connectionLineStyle={{ stroke: '#ddd', strokeWidth: 2 }}
-      connectionLineType="bezier"
       snapToGrid={true}
       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 +140,7 @@ const OverviewFlow = () => {
         }}
       />
       <Controls />
-      <Background
+      <Background color="#888" gap={16} />
-        color="#888"
-        gap={16}
-      />
 
       <button
         type="button"
@@ -87,6 +152,6 @@ const OverviewFlow = () => {
       </button>
     </ReactFlow>
   );
-}
+};
 
 export default OverviewFlow;

example/src/index.js

@@ -6,7 +6,7 @@ import Overview from './Overview';
 import Basic from './Basic';
 import CustomNode from './CustomNode';
 import Stress from './Stress';
-import Inactive from './Inactive';
+import Interaction from './Interaction';
 import Empty from './Empty';
 import Edges from './Edges';
 import Validation from './Validation';
@@ -60,8 +60,9 @@ const routes = [
     component: Empty,
   },
   {
-    path: '/inactive',
+    path: '/interaction',
-    component: Inactive,
+    component: Interaction,
+    label: 'Interaction',
   },
 ];
 

package.json

@@ -27,44 +27,44 @@
     "classnames": "^2.2.6",
     "d3-selection": "^1.4.1",
     "d3-zoom": "^1.8.3",
-    "easy-peasy": "^3.3.0",
+    "easy-peasy": "^3.3.1",
     "fast-deep-equal": "^3.1.3",
     "react-draggable": "^4.4.3",
     "resize-observer": "^1.0.0"
   },
   "devDependencies": {
-    "@babel/core": "^7.10.2",
+    "@babel/core": "^7.10.4",
-    "@babel/preset-env": "^7.10.2",
+    "@babel/preset-env": "^7.10.4",
-    "@babel/preset-react": "^7.10.1",
+    "@babel/preset-react": "^7.10.4",
     "@svgr/rollup": "^5.4.0",
     "@types/classnames": "^2.2.10",
     "@types/d3": "^5.7.2",
-    "@types/react": "^16.9.36",
+    "@types/react": "^16.9.43",
     "@types/react-dom": "^16.9.8",
-    "autoprefixer": "^9.8.0",
+    "autoprefixer": "^9.8.5",
     "babel-loader": "^8.1.0",
     "babel-preset-react-app": "^9.1.2",
-    "cypress": "^4.8.0",
+    "cypress": "^4.10.0",
-    "postcss-nested": "^4.2.1",
+    "postcss-nested": "^4.2.3",
     "prettier": "2.0.5",
     "prop-types": "^15.7.2",
     "react": "^16.13.1",
-    "release-it": "^13.6.3",
+    "release-it": "^13.6.5",
-    "rollup": "^2.16.1",
+    "rollup": "^2.21.0",
     "rollup-plugin-babel": "^4.4.0",
     "rollup-plugin-bundle-size": "^1.0.3",
     "rollup-plugin-commonjs": "^10.1.0",
     "rollup-plugin-livereload": "^1.3.0",
     "rollup-plugin-node-resolve": "^5.2.0",
-    "rollup-plugin-peer-deps-external": "^2.2.2",
+    "rollup-plugin-peer-deps-external": "^2.2.3",
     "rollup-plugin-postcss": "^3.1.2",
     "rollup-plugin-replace": "^2.2.0",
     "rollup-plugin-serve": "^1.0.1",
     "rollup-plugin-terser": "^6.1.0",
     "rollup-plugin-typescript2": "^0.27.1",
     "rollup-plugin-uglify": "^6.0.4",
-    "start-server-and-test": "^1.11.0",
+    "start-server-and-test": "^1.11.2",
-    "typescript": "^3.9.5"
+    "typescript": "^3.9.6"
   },
   "peerDependencies": {
     "react": "^16.13.1"

src/additional-components/Controls/index.tsx

@@ -23,7 +23,7 @@ const Controls = ({ style, showZoom = true, showFitView = true, showInteractive
   const zoomIn = useStoreActions((actions) => actions.zoomIn);
   const zoomOut = useStoreActions((actions) => actions.zoomOut);
 
-  const isInteractive = useStoreState((s) => s.isInteractive);
+  const isInteractive = useStoreState((s) => s.nodesDraggable && s.nodesConnectable && s.elementsSelectable);
   const mapClasses = classnames('react-flow__controls', className);
 
   return (

src/components/ConnectionLine/index.tsx

@@ -1,6 +1,9 @@
 import React, { useEffect, useState, CSSProperties } from 'react';
 import cx from 'classnames';
 
+import { getBezierPath } from '../Edges/BezierEdge';
+import { getStepPath } from '../Edges/StepEdge';
+import { getSmoothStepPath } from '../Edges/SmoothStepEdge';
 import { ElementId, Node, Transform, HandleElement, Position, ConnectionLineType, HandleType } from '../../types';
 
 interface ConnectionLineProps {
@@ -11,7 +14,7 @@ interface ConnectionLineProps {
   connectionLineType: ConnectionLineType;
   nodes: Node[];
   transform: Transform;
-  isInteractive: boolean;
+  isConnectable: boolean;
   connectionLineStyle?: CSSProperties;
   className?: string;
 }
@@ -26,7 +29,7 @@ export default ({
   nodes = [],
   className,
   transform,
-  isInteractive,
+  isConnectable,
 }: ConnectionLineProps) => {
   const [sourceNode, setSourceNode] = useState<Node | null>(null);
   const hasHandleId = connectionNodeId.includes('__');
@@ -39,7 +42,7 @@ export default ({
     setSourceNode(nextSourceNode);
   }, []);
 
-  if (!sourceNode || !isInteractive) {
+  if (!sourceNode || !isConnectable) {
     return null;
   }
 
@@ -57,17 +60,46 @@ export default ({
   const targetY = (connectionPositionY - transform[1]) * (1 / transform[2]);
 
   let dAttr: string = '';
+  const xOffset = Math.abs(targetX - sourceX) / 2;
+  const centerX = targetX < sourceX ? targetX + xOffset : targetX - xOffset;
+
+  const yOffset = Math.abs(targetY - sourceY) / 2;
+  const centerY = targetY < sourceY ? targetY + yOffset : targetY - yOffset;
+  const isRightOrLeft = sourceHandle?.position === Position.Left || sourceHandle?.position === Position.Right;
+  const targetPosition = isRightOrLeft ? Position.Left : Position.Top;
 
   if (connectionLineType === ConnectionLineType.Bezier) {
-    if (sourceHandle?.position === Position.Left || sourceHandle?.position === Position.Right) {
+    dAttr = getBezierPath({
-      const xOffset = Math.abs(targetX - sourceX) / 2;
+      centerX,
-      const centerX = targetX < sourceX ? targetX + xOffset : targetX - xOffset;
+      centerY,
-      dAttr = `M${sourceX},${sourceY} C${centerX},${sourceY} ${centerX},${targetY} ${targetX},${targetY}`;
+      sourceX,
-    } else {
+      sourceY,
-      const yOffset = Math.abs(targetY - sourceY) / 2;
+      sourcePosition: sourceHandle?.position,
-      const centerY = targetY < sourceY ? targetY + yOffset : targetY - yOffset;
+      targetX,
-      dAttr = `M${sourceX},${sourceY} C${sourceX},${centerY} ${targetX},${centerY} ${targetX},${targetY}`;
+      targetY,
-    }
+      targetPosition,
+    });
+  } else if (connectionLineType === ConnectionLineType.Step) {
+    dAttr = getStepPath({
+      centerY,
+      sourceX,
+      sourceY,
+      targetX,
+      targetY,
+    });
+  } else if (connectionLineType === ConnectionLineType.SmoothStep) {
+    dAttr = getSmoothStepPath({
+      xOffset,
+      yOffset,
+      centerX,
+      centerY,
+      sourceX,
+      sourceY,
+      sourcePosition: sourceHandle?.position,
+      targetX,
+      targetY,
+      targetPosition,
+    });
   } else {
     dAttr = `M${sourceX},${sourceY} ${targetX},${targetY}`;
   }

src/components/Edges/BezierEdge.tsx

@@ -3,6 +3,42 @@ import React, { memo } from 'react';
 import EdgeText from './EdgeText';
 import { EdgeBezierProps, Position } from '../../types';
 
+interface GetBezierPathParams {
+  centerX: number;
+  centerY: number;
+  sourceX: number;
+  sourceY: number;
+  sourcePosition?: Position;
+  targetX: number;
+  targetY: number;
+  targetPosition?: Position;
+}
+
+export function getBezierPath({
+  centerX,
+  centerY,
+  sourceX,
+  sourceY,
+  sourcePosition = Position.Bottom,
+  targetX,
+  targetY,
+  targetPosition = Position.Top,
+}: GetBezierPathParams): string {
+  let path = `M${sourceX},${sourceY} C${sourceX},${centerY} ${targetX},${centerY} ${targetX},${targetY}`;
+
+  const leftAndRight = [Position.Left, Position.Right];
+
+  if (leftAndRight.includes(sourcePosition) && leftAndRight.includes(targetPosition)) {
+    path = `M${sourceX},${sourceY} C${centerX},${sourceY} ${centerX},${targetY} ${targetX},${targetY}`;
+  } else if (leftAndRight.includes(targetPosition)) {
+    path = `M${sourceX},${sourceY} C${sourceX},${targetY} ${sourceX},${targetY} ${targetX},${targetY}`;
+  } else if (leftAndRight.includes(sourcePosition)) {
+    path = `M${sourceX},${sourceY} C${targetX},${sourceY} ${targetX},${sourceY} ${targetX},${targetY}`;
+  }
+
+  return path;
+}
+
 export default memo(
   ({
     sourceX,
@@ -23,17 +59,16 @@ export default memo(
     const xOffset = Math.abs(targetX - sourceX) / 2;
     const centerX = targetX < sourceX ? targetX + xOffset : targetX - xOffset;
 
-    let dAttr = `M${sourceX},${sourceY} C${sourceX},${centerY} ${targetX},${centerY} ${targetX},${targetY}`;
+    const path = getBezierPath({
-
+      centerX,
-    const leftAndRight = [Position.Left, Position.Right];
+      centerY,
-
+      sourceX,
-    if (leftAndRight.includes(sourcePosition) && leftAndRight.includes(targetPosition)) {
+      sourceY,
-      dAttr = `M${sourceX},${sourceY} C${centerX},${sourceY} ${centerX},${targetY} ${targetX},${targetY}`;
+      sourcePosition,
-    } else if (leftAndRight.includes(targetPosition)) {
+      targetX,
-      dAttr = `M${sourceX},${sourceY} C${sourceX},${targetY} ${sourceX},${targetY} ${targetX},${targetY}`;
+      targetY,
-    } else if (leftAndRight.includes(sourcePosition)) {
+      targetPosition,
-      dAttr = `M${sourceX},${sourceY} C${targetX},${sourceY} ${targetX},${sourceY} ${targetX},${targetY}`;
+    });
-    }
 
     const text = label ? (
       <EdgeText
@@ -48,7 +83,7 @@ export default memo(
 
     return (
       <>
-        <path style={style} d={dAttr} className="react-flow__edge-path" />
+        <path style={style} d={path} className="react-flow__edge-path" />
         {text}
       </>
     );

src/components/Edges/SmoothStepEdge.tsx

@@ -0,0 +1,179 @@
+import React, { memo } from 'react';
+
+import EdgeText from './EdgeText';
+import { EdgeBezierProps, Position } from '../../types';
+
+// These are some helper methods for drawing the round corners
+// The name indicates the direction of the path. "bottomLeftCorner" goes
+// from bottom to the left and "leftBottomCorner" goes from left to the bottom.
+// We have to consider the direction of the paths because of the animated lines.
+
+const bottomLeftCorner = (cornerX: number, cornerY: number, cornerSize: number): string =>
+  `L ${cornerX},${cornerY - cornerSize}Q ${cornerX},${cornerY} ${cornerX + cornerSize},${cornerY}`;
+
+const leftBottomCorner = (cornerX: number, cornerY: number, cornerSize: number): string =>
+  `L ${cornerX + cornerSize},${cornerY}Q ${cornerX},${cornerY} ${cornerX},${cornerY - cornerSize}`;
+
+const bottomRightCorner = (cornerX: number, cornerY: number, cornerSize: number): string =>
+  `L ${cornerX},${cornerY - cornerSize}Q ${cornerX},${cornerY} ${cornerX - cornerSize},${cornerY}`;
+
+const rightBottomCorner = (cornerX: number, cornerY: number, cornerSize: number): string =>
+  `L ${cornerX - cornerSize},${cornerY}Q ${cornerX},${cornerY} ${cornerX},${cornerY - cornerSize}`;
+
+const leftTopCorner = (cornerX: number, cornerY: number, cornerSize: number): string =>
+  `L ${cornerX + cornerSize},${cornerY}Q ${cornerX},${cornerY} ${cornerX},${cornerY + cornerSize}`;
+
+const topLeftCorner = (cornerX: number, cornerY: number, cornerSize: number): string =>
+  `L ${cornerX},${cornerY + cornerSize}Q ${cornerX},${cornerY} ${cornerX + cornerSize},${cornerY}`;
+
+const topRightCorner = (cornerX: number, cornerY: number, cornerSize: number): string =>
+  `L ${cornerX},${cornerY + cornerSize}Q ${cornerX},${cornerY} ${cornerX - cornerSize},${cornerY}`;
+
+const rightTopCorner = (cornerX: number, cornerY: number, cornerSize: number): string =>
+  `L ${cornerX - cornerSize},${cornerY}Q ${cornerX},${cornerY} ${cornerX},${cornerY + cornerSize}`;
+
+interface GetSmoothStepPathParams {
+  xOffset: number;
+  yOffset: number;
+  centerX: number;
+  centerY: number;
+  sourceX: number;
+  sourceY: number;
+  sourcePosition?: Position;
+  targetX: number;
+  targetY: number;
+  targetPosition?: Position;
+}
+
+export function getSmoothStepPath({
+  xOffset,
+  yOffset,
+  centerX,
+  centerY,
+  sourceX,
+  sourceY,
+  sourcePosition = Position.Bottom,
+  targetX,
+  targetY,
+  targetPosition = Position.Top,
+}: GetSmoothStepPathParams): string {
+  const cornerWidth = Math.min(5, Math.abs(targetX - sourceX));
+  const cornerHeight = Math.min(5, Math.abs(targetY - sourceY));
+  const cornerSize = Math.min(cornerWidth, cornerHeight, xOffset, yOffset);
+
+  const leftAndRight = [Position.Left, Position.Right];
+
+  let firstCornerPath = null;
+  let secondCornerPath = null;
+
+  // default case: source and target positions are top or bottom
+  if (sourceX < targetX) {
+    firstCornerPath =
+      sourceY < targetY ? bottomLeftCorner(sourceX, centerY, cornerSize) : topLeftCorner(sourceX, centerY, cornerSize);
+    secondCornerPath =
+      sourceY < targetY
+        ? rightTopCorner(targetX, centerY, cornerSize)
+        : rightBottomCorner(targetX, centerY, cornerSize);
+  } else if (sourceX > targetX) {
+    firstCornerPath =
+      sourceY < targetY
+        ? bottomRightCorner(sourceX, centerY, cornerSize)
+        : topRightCorner(sourceX, centerY, cornerSize);
+    secondCornerPath =
+      sourceY < targetY ? leftTopCorner(targetX, centerY, cornerSize) : leftBottomCorner(targetX, centerY, cornerSize);
+  }
+
+  if (leftAndRight.includes(sourcePosition) && leftAndRight.includes(targetPosition)) {
+    if (sourceX < targetX) {
+      firstCornerPath =
+        sourceY < targetY
+          ? rightTopCorner(centerX, sourceY, cornerSize)
+          : rightBottomCorner(centerX, sourceY, cornerSize);
+      secondCornerPath =
+        sourceY < targetY
+          ? bottomLeftCorner(centerX, targetY, cornerSize)
+          : topLeftCorner(centerX, targetY, cornerSize);
+    }
+  } else if (leftAndRight.includes(sourcePosition) && !leftAndRight.includes(targetPosition)) {
+    if (sourceX < targetX) {
+      firstCornerPath =
+        sourceY < targetY
+          ? rightTopCorner(targetX, sourceY, cornerSize)
+          : rightBottomCorner(targetX, sourceY, cornerSize);
+    } else if (sourceX > targetX) {
+      firstCornerPath =
+        sourceY < targetY
+          ? bottomRightCorner(sourceX, targetY, cornerSize)
+          : topRightCorner(sourceX, targetY, cornerSize);
+    }
+    secondCornerPath = '';
+  } else if (!leftAndRight.includes(sourcePosition) && leftAndRight.includes(targetPosition)) {
+    if (sourceX < targetX) {
+      firstCornerPath =
+        sourceY < targetY
+          ? bottomLeftCorner(sourceX, targetY, cornerSize)
+          : topLeftCorner(sourceX, targetY, cornerSize);
+    } else if (sourceX > targetX) {
+      firstCornerPath =
+        sourceY < targetY
+          ? bottomRightCorner(sourceX, targetY, cornerSize)
+          : topRightCorner(sourceX, targetY, cornerSize);
+    }
+    secondCornerPath = '';
+  }
+
+  return `M ${sourceX},${sourceY}${firstCornerPath}${secondCornerPath}L ${targetX},${targetY}`;
+}
+
+export default memo(
+  ({
+    sourceX,
+    sourceY,
+    targetX,
+    targetY,
+    label,
+    labelStyle,
+    labelShowBg,
+    labelBgStyle,
+    style,
+    sourcePosition = Position.Bottom,
+    targetPosition = Position.Top,
+  }: EdgeBezierProps) => {
+    const yOffset = Math.abs(targetY - sourceY) / 2;
+    const centerY = targetY < sourceY ? targetY + yOffset : targetY - yOffset;
+
+    const xOffset = Math.abs(targetX - sourceX) / 2;
+    const centerX = targetX < sourceX ? targetX + xOffset : targetX - xOffset;
+
+    const path = getSmoothStepPath({
+      xOffset,
+      yOffset,
+      centerX,
+      centerY,
+      sourceX,
+      sourceY,
+      sourcePosition,
+      targetX,
+      targetY,
+      targetPosition,
+    });
+
+    const text = label ? (
+      <EdgeText
+        x={centerX}
+        y={centerY}
+        label={label}
+        labelStyle={labelStyle}
+        labelShowBg={labelShowBg}
+        labelBgStyle={labelBgStyle}
+      />
+    ) : null;
+
+    return (
+      <>
+        <path style={style} className="react-flow__edge-path" d={path} />
+        {text}
+      </>
+    );
+  }
+);

src/components/Edges/StepEdge.tsx

@@ -3,6 +3,18 @@ import React, { memo } from 'react';
 import EdgeText from './EdgeText';
 import { EdgeProps } from '../../types';
 
+interface GetStepPathParams {
+  centerY: number;
+  sourceX: number;
+  sourceY: number;
+  targetX: number;
+  targetY: number;
+}
+
+export function getStepPath({ centerY, sourceX, sourceY, targetX, targetY }: GetStepPathParams): string {
+  return `M ${sourceX},${sourceY}L ${sourceX},${centerY}L ${targetX},${centerY}L ${targetX},${targetY}`;
+}
+
 export default memo(
   ({ sourceX, sourceY, targetX, targetY, label, labelStyle, labelShowBg, labelBgStyle, style }: EdgeProps) => {
     const yOffset = Math.abs(targetY - sourceY) / 2;
@@ -11,6 +23,8 @@ export default memo(
     const xOffset = Math.abs(targetX - sourceX) / 2;
     const centerX = targetX < sourceX ? targetX + xOffset : targetX - xOffset;
 
+    const path = getStepPath({ centerY, sourceX, sourceY, targetX, targetY });
+
     const text = label ? (
       <EdgeText
         x={centerX}
@@ -24,11 +38,7 @@ export default memo(
 
     return (
       <>
-        <path
+        <path style={style} className="react-flow__edge-path" d={path} />
-          style={style}
-          className="react-flow__edge-path"
-          d={`M ${sourceX},${sourceY}L ${sourceX},${centerY}L ${targetX},${centerY}L ${targetX},${targetY}`}
-        />
         {text}
       </>
     );

src/components/Edges/wrapEdge.tsx

@@ -17,7 +17,7 @@ interface EdgeWrapperProps {
   onClick?: (edge: Edge) => void;
   animated?: boolean;
   selected: boolean;
-  isInteractive: boolean;
+  elementsSelectable: boolean;
 }
 
 export default (EdgeComponent: ComponentType<EdgeCompProps>) => {
@@ -30,7 +30,7 @@ export default (EdgeComponent: ComponentType<EdgeCompProps>) => {
       animated,
       selected,
       onClick,
-      isInteractive,
+      elementsSelectable,
       label,
       labelStyle,
       labelShowBg,
@@ -41,10 +41,10 @@ export default (EdgeComponent: ComponentType<EdgeCompProps>) => {
       const setSelectedElements = useStoreActions((a) => a.setSelectedElements);
       const edgeClasses = cx('react-flow__edge', `react-flow__edge-${type}`, className, { selected, animated });
       const edgeGroupStyle: CSSProperties = {
-        pointerEvents: isInteractive ? 'all' : 'none',
+        pointerEvents: elementsSelectable ? 'all' : 'none',
       };
       const onEdgeClick = (): void => {
-        if (!isInteractive) {
+        if (!elementsSelectable) {
           return;
         }
 

src/components/Handle/index.tsx

@@ -1,4 +1,5 @@
 import React, { memo, useContext } from 'react';
+import classnames from 'classnames';
 
 import { useStoreActions, useStoreState } from '../../store/hooks';
 import BaseHandle from './BaseHandle';
@@ -12,6 +13,7 @@ const Handle = memo(
     position = Position.Top,
     onConnect = () => {},
     isValidConnection = () => true,
+    isConnectable = true,
     style,
     className,
     id,
@@ -24,9 +26,12 @@ const Handle = memo(
       onConnectAction(params);
       onConnect(params);
     };
+    const handleClasses = classnames(className, { connectable: isConnectable });
 
     return (
       <BaseHandle
+        className={handleClasses}
+        id={id}
         nodeId={nodeId}
         setPosition={setPosition}
         setConnectionNodeId={setConnectionNodeId}
@@ -35,8 +40,6 @@ const Handle = memo(
         position={position}
         isValidConnection={isValidConnection}
         style={style}
-        className={className}
-        id={id}
       />
     );
   }

src/components/Nodes/DefaultNode.tsx

@@ -3,13 +3,15 @@ import React, { memo } from 'react';
 import Handle from '../../components/Handle';
 import { NodeProps, Position } from '../../types';
 
-const DefaultNode = memo(({ data, targetPosition = Position.Top, sourcePosition = Position.Bottom }: NodeProps) => (
+const DefaultNode = memo(
-  <>
+  ({ data, isConnectable, targetPosition = Position.Top, sourcePosition = Position.Bottom }: NodeProps) => (
-    <Handle type="target" position={targetPosition} />
+    <>
-    {data.label}
+      <Handle type="target" position={targetPosition} isConnectable={isConnectable} />
-    <Handle type="source" position={sourcePosition} />
+      {data.label}
-  </>
+      <Handle type="source" position={sourcePosition} isConnectable={isConnectable} />
-));
+    </>
+  )
+);
 
 DefaultNode.displayName = 'DefaultNode';
 

src/components/Nodes/InputNode.tsx

@@ -3,10 +3,10 @@ import React, { memo } from 'react';
 import Handle from '../../components/Handle';
 import { NodeProps, Position } from '../../types';
 
-const InputNode = memo(({ data, sourcePosition = Position.Bottom }: NodeProps) => (
+const InputNode = memo(({ data, isConnectable, sourcePosition = Position.Bottom }: NodeProps) => (
   <>
     {data.label}
-    <Handle type="source" position={sourcePosition} />
+    <Handle type="source" position={sourcePosition} isConnectable={isConnectable} />
   </>
 ));
 

src/components/Nodes/OutputNode.tsx

@@ -3,9 +3,9 @@ import React, { memo } from 'react';
 import Handle from '../../components/Handle';
 import { NodeProps, Position } from '../../types';
 
-const OutputNode = memo(({ data, targetPosition = Position.Top }: NodeProps) => (
+const OutputNode = memo(({ data, isConnectable, targetPosition = Position.Top }: NodeProps) => (
   <>
-    <Handle type="target" position={targetPosition} />
+    <Handle type="target" position={targetPosition} isConnectable={isConnectable} />
     {data.label}
   </>
 ));

src/components/Nodes/wrapNode.tsx

@@ -1,4 +1,14 @@
-import React, { useEffect, useRef, useState, memo, ComponentType, CSSProperties } from 'react';
+import React, {
+  useEffect,
+  useRef,
+  useState,
+  memo,
+  ComponentType,
+  CSSProperties,
+  useMemo,
+  MouseEvent,
+  useCallback,
+} from 'react';
 import { DraggableCore } from 'react-draggable';
 import cx from 'classnames';
 import { ResizeObserver } from 'resize-observer';
@@ -17,6 +27,8 @@ import {
   NodePosUpdate,
 } from '../../types';
 
+import { noop } from '../../utils';
+
 const getMouseEvent = (evt: MouseEvent | TouchEvent) =>
   typeof TouchEvent !== 'undefined' && evt instanceof TouchEvent ? evt.touches[0] : (evt as MouseEvent);
 
@@ -26,6 +38,7 @@ interface OnDragStartParams {
   type: string;
   data: any;
   selectNodesOnDrag: boolean;
+  isSelectable: boolean;
   setOffset: (pos: XYPosition) => void;
   transform: Transform;
   position: XYPosition;
@@ -44,6 +57,7 @@ const onStart = ({
   transform,
   position,
   setSelectedElements,
+  isSelectable,
 }: OnDragStartParams): false | void => {
   const startEvt = getMouseEvent(evt);
 
@@ -62,7 +76,7 @@ const onStart = ({
     onNodeDragStart(node);
   }
 
-  if (selectNodesOnDrag) {
+  if (selectNodesOnDrag && isSelectable) {
     setSelectedElements({ id, type } as Node);
   }
 };
@@ -102,6 +116,7 @@ interface OnDragStopParams {
   position: XYPosition;
   data: any;
   selectNodesOnDrag: boolean;
+  isSelectable: boolean;
   setSelectedElements: (elms: Elements | Node | Edge) => void;
   onNodeDragStop?: (node: Node) => void;
   onClick?: (node: Node) => void;
@@ -115,6 +130,7 @@ const onStop = ({
   isDragging,
   setDragging,
   selectNodesOnDrag,
+  isSelectable,
   onNodeDragStop,
   onClick,
   setSelectedElements,
@@ -125,8 +141,7 @@ const onStop = ({
     position,
     data,
   } as Node;
-
+  if (!isDragging && isSelectable) {
-  if (!isDragging) {
     if (!selectNodesOnDrag) {
       setSelectedElements({ id, type } as Node);
     }
@@ -154,11 +169,17 @@ export default (NodeComponent: ComponentType<NodeComponentProps>) => {
       yPos,
       selected,
       onClick,
+      onMouseEnter,
+      onMouseMove,
+      onMouseLeave,
+      onContextMenu,
       onNodeDragStart,
       onNodeDragStop,
       style,
       className,
-      isInteractive,
+      isDraggable,
+      isSelectable,
+      isConnectable,
       selectNodesOnDrag,
       sourcePosition,
       targetPosition,
@@ -171,12 +192,55 @@ export default (NodeComponent: ComponentType<NodeComponentProps>) => {
       const [offset, setOffset] = useState({ x: 0, y: 0 });
       const [isDragging, setDragging] = useState(false);
       const position = { x: xPos, y: yPos };
-      const nodeClasses = cx('react-flow__node', `react-flow__node-${type}`, className, { selected });
+      const nodeClasses = cx('react-flow__node', `react-flow__node-${type}`, className, {
+        selected,
+        selectable: isSelectable,
+      });
+      const node = { id, type, position, data };
+      const onMouseEnterHandler = useMemo(() => {
+        if (!onMouseEnter || isDragging) {
+          return noop;
+        }
+
+        return (evt: MouseEvent) => onMouseEnter(evt, node);
+      }, [onMouseEnter, isDragging]);
+
+      const onMouseMoveHandler = useMemo(() => {
+        if (!onMouseMove || isDragging) {
+          return noop;
+        }
+
+        return (evt: MouseEvent) => onMouseMove(evt, node);
+      }, [onMouseMove, isDragging]);
+
+      const onMouseLeaveHandler = useMemo(() => {
+        if (!onMouseLeave || isDragging) {
+          return noop;
+        }
+
+        return (evt: MouseEvent) => onMouseLeave(evt, node);
+      }, [onMouseLeave, isDragging]);
+
+      const onContextMenuHandler = useMemo(() => {
+        if (!onContextMenu) {
+          return noop;
+        }
+
+        return (evt: MouseEvent) => onContextMenu(evt, node);
+      }, [onContextMenu]);
+
+      const onSelectNodeHandler = useCallback(() => {
+        if (!isDraggable && isSelectable) {
+          setSelectedElements({ id, type } as Node);
+        }
+
+        return noop;
+      }, [isSelectable, isDraggable, id, type]);
 
       const nodeStyle: CSSProperties = {
         zIndex: selected ? 10 : 3,
         transform: `translate(${xPos}px,${yPos}px)`,
-        pointerEvents: isInteractive ? 'all' : 'none',
+        pointerEvents: isSelectable || isDraggable ? 'all' : 'none',
         ...style,
       };
 
@@ -208,6 +272,7 @@ export default (NodeComponent: ComponentType<NodeComponentProps>) => {
             onStart({
               evt: evt as MouseEvent,
               selectNodesOnDrag,
+              isSelectable,
               onNodeDragStart,
               id,
               type,
@@ -223,6 +288,7 @@ export default (NodeComponent: ComponentType<NodeComponentProps>) => {
             onStop({
               onNodeDragStop,
               selectNodesOnDrag,
+              isSelectable,
               onClick,
               isDragging,
               setDragging,
@@ -234,16 +300,26 @@ export default (NodeComponent: ComponentType<NodeComponentProps>) => {
             })
           }
           scale={transform[2]}
-          disabled={!isInteractive}
+          disabled={!isDraggable}
           cancel=".nodrag"
         >
-          <div className={nodeClasses} ref={nodeElement} style={nodeStyle}>
+          <div
+            className={nodeClasses}
+            ref={nodeElement}
+            style={nodeStyle}
+            onMouseEnter={onMouseEnterHandler}
+            onMouseMove={onMouseMoveHandler}
+            onMouseLeave={onMouseLeaveHandler}
+            onContextMenu={onContextMenuHandler}
+            onClick={onSelectNodeHandler}
+          >
             <Provider value={id}>
               <NodeComponent
                 id={id}
                 data={data}
                 type={type}
                 selected={selected}
+                isConnectable={isConnectable}
                 sourcePosition={sourcePosition}
                 targetPosition={targetPosition}
               />

src/components/UserSelection/index.tsx

@@ -8,7 +8,6 @@ import { useStoreActions, useStoreState } from '../../store/hooks';
 import { XYPosition } from '../../types';
 
 type UserSelectionProps = {
-  isInteractive: boolean;
   selectionKeyPressed: boolean;
 };
 
@@ -45,8 +44,9 @@ const SelectionRect = () => {
   );
 };
 
-export default memo(({ isInteractive, selectionKeyPressed }: UserSelectionProps) => {
+export default memo(({ selectionKeyPressed }: UserSelectionProps) => {
   const selectionActive = useStoreState((s) => s.selectionActive);
+  const elementsSelectable = useStoreState((s) => s.elementsSelectable);
 
   const setUserSelection = useStoreActions((a) => a.setUserSelection);
   const updateUserSelection = useStoreActions((a) => a.updateUserSelection);
@@ -59,7 +59,7 @@ export default memo(({ isInteractive, selectionKeyPressed }: UserSelectionProps)
     }
   }, [selectionKeyPressed]);
 
-  if (!isInteractive || !renderUserSelectionPane) {
+  if (!elementsSelectable || !renderUserSelectionPane) {
     return null;
   }
 

src/container/EdgeRenderer/index.tsx

@@ -118,7 +118,7 @@ function renderEdge(
   props: EdgeRendererProps,
   nodes: Node[],
   selectedElements: Elements | null,
-  isInteractive: boolean
+  elementsSelectable: boolean
 ) {
   const [sourceId, sourceHandleId] = edge.source.split('__');
   const [targetId, targetHandleId] = edge.target.split('__');
@@ -181,7 +181,7 @@ function renderEdge(
       targetY={targetY}
       sourcePosition={sourcePosition}
       targetPosition={targetPosition}
-      isInteractive={isInteractive}
+      elementsSelectable={elementsSelectable}
     />
   );
 }
@@ -194,7 +194,8 @@ const EdgeRenderer = memo((props: EdgeRendererProps) => {
   const connectionHandleType = useStoreState((s) => s.connectionHandleType);
   const connectionPosition = useStoreState((s) => s.connectionPosition);
   const selectedElements = useStoreState((s) => s.selectedElements);
-  const isInteractive = useStoreState((s) => s.isInteractive);
+  const nodesConnectable = useStoreState((s) => s.nodesConnectable);
+  const elementsSelectable = useStoreState((s) => s.elementsSelectable);
 
   const { width, height, connectionLineStyle, connectionLineType } = props;
 
@@ -208,7 +209,7 @@ const EdgeRenderer = memo((props: EdgeRendererProps) => {
   return (
     <svg width={width} height={height} className="react-flow__edges">
       <g transform={transformStyle}>
-        {edges.map((e: Edge) => renderEdge(e, props, nodes, selectedElements, isInteractive))}
+        {edges.map((e: Edge) => renderEdge(e, props, nodes, selectedElements, elementsSelectable))}
         {renderConnectionLine && (
           <ConnectionLine
             nodes={nodes}
@@ -219,7 +220,7 @@ const EdgeRenderer = memo((props: EdgeRendererProps) => {
             transform={[tX, tY, tScale]}
             connectionLineStyle={connectionLineStyle}
             connectionLineType={connectionLineType}
-            isInteractive={isInteractive}
+            isConnectable={nodesConnectable}
           />
         )}
       </g>

src/container/EdgeRenderer/utils.ts

@@ -3,6 +3,7 @@ import { ComponentType } from 'react';
 import StraightEdge from '../../components/Edges/StraightEdge';
 import BezierEdge from '../../components/Edges/BezierEdge';
 import StepEdge from '../../components/Edges/StepEdge';
+import SmoothStepEdge from '../../components/Edges/SmoothStepEdge';
 import wrapEdge from '../../components/Edges/wrapEdge';
 
 import { EdgeTypesType, EdgeCompProps } from '../../types';
@@ -12,6 +13,7 @@ export function createEdgeTypes(edgeTypes: EdgeTypesType): EdgeTypesType {
     default: wrapEdge((edgeTypes.default || BezierEdge) as ComponentType<EdgeCompProps>),
     straight: wrapEdge((edgeTypes.bezier || StraightEdge) as ComponentType<EdgeCompProps>),
     step: wrapEdge((edgeTypes.step || StepEdge) as ComponentType<EdgeCompProps>),
+    smoothstep: wrapEdge((edgeTypes.step || SmoothStepEdge) as ComponentType<EdgeCompProps>),
   };
 
   const wrappedTypes = {} as EdgeTypesType;

src/container/GraphView/index.tsx

@@ -1,5 +1,4 @@
-import React, { useEffect, useRef, memo, CSSProperties } from 'react';
+import React, { useEffect, useRef, memo, CSSProperties, MouseEvent } from 'react';
-import classnames from 'classnames';
 import { ResizeObserver } from 'resize-observer';
 
 import { useStoreState, useStoreActions } from '../../store/hooks';
@@ -28,6 +27,10 @@ export interface GraphViewProps {
   elements: Elements;
   onElementClick?: (element: Node | Edge) => void;
   onElementsRemove?: (elements: Elements) => void;
+  onNodeMouseEnter?: (evt: MouseEvent, node: Node) => void;
+  onNodeMouseMove?: (evt: MouseEvent, node: Node) => void;
+  onNodeMouseLeave?: (evt: MouseEvent, node: Node) => void;
+  onNodeContextMenu?: (evt: MouseEvent, node: Node) => void;
   onNodeDragStart?: (node: Node) => void;
   onNodeDragStop?: (node: Node) => void;
   onConnect?: (connection: Connection | Edge) => void;
@@ -42,7 +45,9 @@ export interface GraphViewProps {
   snapToGrid: boolean;
   snapGrid: [number, number];
   onlyRenderVisibleNodes: boolean;
-  isInteractive: boolean;
+  nodesDraggable: boolean;
+  nodesConnectable: boolean;
+  elementsSelectable: boolean;
   selectNodesOnDrag: boolean;
   minZoom: number;
   maxZoom: number;
@@ -56,6 +61,10 @@ const GraphView = memo(
     onMove,
     onLoad,
     onElementClick,
+    onNodeMouseEnter,
+    onNodeMouseMove,
+    onNodeMouseLeave,
+    onNodeContextMenu,
     onNodeDragStart,
     onNodeDragStop,
     connectionLineType,
@@ -68,7 +77,9 @@ const GraphView = memo(
     snapToGrid,
     snapGrid,
     onlyRenderVisibleNodes,
-    isInteractive,
+    nodesDraggable,
+    nodesConnectable,
+    elementsSelectable,
     selectNodesOnDrag,
     minZoom,
     maxZoom,
@@ -84,14 +95,15 @@ const GraphView = memo(
     const setNodesSelection = useStoreActions((actions) => actions.setNodesSelection);
     const setOnConnect = useStoreActions((a) => a.setOnConnect);
     const setSnapGrid = useStoreActions((actions) => actions.setSnapGrid);
-    const setInteractive = useStoreActions((actions) => actions.setInteractive);
+    const setNodesDraggable = useStoreActions((actions) => actions.setNodesDraggable);
+    const setNodesConnectable = useStoreActions((actions) => actions.setNodesConnectable);
+    const setElementsSelectable = useStoreActions((actions) => actions.setElementsSelectable);
     const updateTransform = useStoreActions((actions) => actions.updateTransform);
     const setMinMaxZoom = useStoreActions((actions) => actions.setMinMaxZoom);
     const fitView = useStoreActions((actions) => actions.fitView);
     const zoom = useStoreActions((actions) => actions.zoom);
 
     const selectionKeyPressed = useKeyPress(selectionKeyCode);
-    const rendererClasses = classnames('react-flow__renderer', { 'is-interactive': isInteractive });
 
     const onZoomPaneClick = () => setNodesSelection({ isActive: false });
 
@@ -161,8 +173,16 @@ const GraphView = memo(
     }, [snapToGrid]);
 
     useEffect(() => {
-      setInteractive(isInteractive);
+      setNodesDraggable(nodesDraggable);
-    }, [isInteractive]);
+    }, [nodesDraggable]);
+
+    useEffect(() => {
+      setNodesConnectable(nodesConnectable);
+    }, [nodesConnectable]);
+
+    useEffect(() => {
+      setElementsSelectable(elementsSelectable);
+    }, [elementsSelectable]);
 
     useEffect(() => {
       setMinMaxZoom({ minZoom, maxZoom });
@@ -172,10 +192,14 @@ const GraphView = memo(
     useElementUpdater(elements);
 
     return (
-      <div className={rendererClasses} ref={rendererNode}>
+      <div className="react-flow__renderer" ref={rendererNode}>
         <NodeRenderer
           nodeTypes={nodeTypes}
           onElementClick={onElementClick}
+          onNodeMouseEnter={onNodeMouseEnter}
+          onNodeMouseMove={onNodeMouseMove}
+          onNodeMouseLeave={onNodeMouseLeave}
+          onNodeContextMenu={onNodeContextMenu}
           onNodeDragStop={onNodeDragStop}
           onNodeDragStart={onNodeDragStart}
           onlyRenderVisibleNodes={onlyRenderVisibleNodes}
@@ -189,7 +213,7 @@ const GraphView = memo(
           connectionLineType={connectionLineType}
           connectionLineStyle={connectionLineStyle}
         />
-        <UserSelection selectionKeyPressed={selectionKeyPressed} isInteractive={isInteractive} />
+        <UserSelection selectionKeyPressed={selectionKeyPressed} />
         {nodesSelectionActive && <NodesSelection />}
         <div className="react-flow__zoompane" onClick={onZoomPaneClick} ref={zoomPane} />
       </div>

src/container/NodeRenderer/index.tsx

@@ -1,4 +1,4 @@
-import React, { memo, ComponentType } from 'react';
+import React, { memo, ComponentType, MouseEvent } from 'react';
 
 import { useStoreState } from '../../store/hooks';
 import { getNodesInside } from '../../utils/graph';
@@ -8,6 +8,10 @@ interface NodeRendererProps {
   nodeTypes: NodeTypesType;
   selectNodesOnDrag: boolean;
   onElementClick?: (element: Node | Edge) => void;
+  onNodeMouseEnter?: (evt: MouseEvent, node: Node) => void;
+  onNodeMouseMove?: (evt: MouseEvent, node: Node) => void;
+  onNodeMouseLeave?: (evt: MouseEvent, node: Node) => void;
+  onNodeContextMenu?: (evt: MouseEvent, node: Node) => void;
   onNodeDragStart?: (node: Node) => void;
   onNodeDragStop?: (node: Node) => void;
   onlyRenderVisibleNodes?: boolean;
@@ -18,7 +22,9 @@ function renderNode(
   props: NodeRendererProps,
   transform: Transform,
   selectedElements: Elements | null,
-  isInteractive: boolean
+  nodesDraggable: boolean,
+  nodesConnectable: boolean,
+  elementsSelectable: boolean
 ) {
   const nodeType = node.type || 'default';
   const NodeComponent = (props.nodeTypes[nodeType] || props.nodeTypes.default) as ComponentType<WrapNodeProps>;
@@ -37,13 +43,19 @@ function renderNode(
       xPos={node.__rf.position.x}
       yPos={node.__rf.position.y}
       onClick={props.onElementClick}
+      onMouseEnter={props.onNodeMouseEnter}
+      onMouseMove={props.onNodeMouseMove}
+      onMouseLeave={props.onNodeMouseLeave}
+      onContextMenu={props.onNodeContextMenu}
       onNodeDragStart={props.onNodeDragStart}
       onNodeDragStop={props.onNodeDragStop}
       transform={transform}
       selected={isSelected}
       style={node.style}
       className={node.className}
-      isInteractive={isInteractive}
+      isDraggable={nodesDraggable}
+      isSelectable={elementsSelectable}
+      isConnectable={nodesConnectable}
       sourcePosition={node.sourcePosition}
       targetPosition={node.targetPosition}
       selectNodesOnDrag={props.selectNodesOnDrag}
@@ -57,7 +69,10 @@ const NodeRenderer = memo(({ onlyRenderVisibleNodes = true, ...props }: NodeRend
   const selectedElements = useStoreState((s) => s.selectedElements);
   const width = useStoreState((s) => s.width);
   const height = useStoreState((s) => s.height);
-  const isInteractive = useStoreState((s) => s.isInteractive);
+  const nodesDraggable = useStoreState((s) => s.nodesDraggable);
+  const nodesConnectable = useStoreState((s) => s.nodesConnectable);
+  const elementsSelectable = useStoreState((s) => s.elementsSelectable);
+
   const [tX, tY, tScale] = transform;
   const transformStyle = {
     transform: `translate(${tX}px,${tY}px) scale(${tScale})`,
@@ -69,7 +84,9 @@ const NodeRenderer = memo(({ onlyRenderVisibleNodes = true, ...props }: NodeRend
 
   return (
     <div className="react-flow__nodes" style={transformStyle}>
-      {renderNodes.map((node) => renderNode(node, props, transform, selectedElements, isInteractive))}
+      {renderNodes.map((node) =>
+        renderNode(node, props, transform, selectedElements, nodesDraggable, nodesConnectable, elementsSelectable)
+      )}
     </div>
   );
 });

src/container/ReactFlow/index.tsx

@@ -1,4 +1,4 @@
-import React, { useMemo, CSSProperties, HTMLAttributes } from 'react';
+import React, { useMemo, CSSProperties, HTMLAttributes, MouseEvent } from 'react';
 import cx from 'classnames';
 
 const nodeEnv: string = process.env.NODE_ENV as string;
@@ -17,6 +17,7 @@ import SelectionListener from '../../components/SelectionListener';
 import BezierEdge from '../../components/Edges/BezierEdge';
 import StraightEdge from '../../components/Edges/StraightEdge';
 import StepEdge from '../../components/Edges/StepEdge';
+import SmoothStepEdge from '../../components/Edges/SmoothStepEdge';
 import { createEdgeTypes } from '../EdgeRenderer/utils';
 import Wrapper from './Wrapper';
 import {
@@ -36,6 +37,10 @@ export interface ReactFlowProps extends Omit<HTMLAttributes<HTMLDivElement>, 'on
   elements: Elements;
   onElementClick?: (element: Node | Edge) => void;
   onElementsRemove?: (elements: Elements) => void;
+  onNodeMouseEnter?: (evt: MouseEvent, node: Node) => void;
+  onNodeMouseMove?: (evt: MouseEvent, node: Node) => void;
+  onNodeMouseLeave?: (evt: MouseEvent, node: Node) => void;
+  onNodeContextMenu?: (evt: MouseEvent, node: Node) => void;
   onNodeDragStart?: (node: Node) => void;
   onNodeDragStop?: (node: Node) => void;
   onConnect?: (connection: Edge | Connection) => void;
@@ -51,7 +56,9 @@ export interface ReactFlowProps extends Omit<HTMLAttributes<HTMLDivElement>, 'on
   snapToGrid: boolean;
   snapGrid: [number, number];
   onlyRenderVisibleNodes: boolean;
-  isInteractive: boolean;
+  nodesDraggable: boolean;
+  nodesConnectable: boolean;
+  elementsSelectable: boolean;
   selectNodesOnDrag: boolean;
   minZoom: number;
   maxZoom: number;
@@ -70,6 +77,10 @@ const ReactFlow = ({
   onMove,
   onElementsRemove,
   onConnect,
+  onNodeMouseEnter,
+  onNodeMouseMove,
+  onNodeMouseLeave,
+  onNodeContextMenu,
   onNodeDragStart,
   onNodeDragStop,
   onSelectionChange,
@@ -80,7 +91,9 @@ const ReactFlow = ({
   snapToGrid,
   snapGrid,
   onlyRenderVisibleNodes,
-  isInteractive,
+  nodesDraggable,
+  nodesConnectable,
+  elementsSelectable,
   selectNodesOnDrag,
   minZoom,
   maxZoom,
@@ -96,6 +109,10 @@ const ReactFlow = ({
           onLoad={onLoad}
           onMove={onMove}
           onElementClick={onElementClick}
+          onNodeMouseEnter={onNodeMouseEnter}
+          onNodeMouseMove={onNodeMouseMove}
+          onNodeMouseLeave={onNodeMouseLeave}
+          onNodeContextMenu={onNodeContextMenu}
           onNodeDragStart={onNodeDragStart}
           onNodeDragStop={onNodeDragStop}
           nodeTypes={nodeTypesParsed}
@@ -110,7 +127,9 @@ const ReactFlow = ({
           snapToGrid={snapToGrid}
           snapGrid={snapGrid}
           onlyRenderVisibleNodes={onlyRenderVisibleNodes}
-          isInteractive={isInteractive}
+          nodesDraggable={nodesDraggable}
+          nodesConnectable={nodesConnectable}
+          elementsSelectable={elementsSelectable}
           selectNodesOnDrag={selectNodesOnDrag}
           minZoom={minZoom}
           maxZoom={maxZoom}
@@ -135,6 +154,7 @@ ReactFlow.defaultProps = {
     default: BezierEdge,
     straight: StraightEdge,
     step: StepEdge,
+    smoothstep: SmoothStepEdge,
   },
   connectionLineType: ConnectionLineType.Bezier,
   deleteKeyCode: 8,
@@ -142,7 +162,9 @@ ReactFlow.defaultProps = {
   snapToGrid: false,
   snapGrid: [16, 16],
   onlyRenderVisibleNodes: true,
-  isInteractive: true,
+  nodesDraggable: true,
+  nodesConnectable: true,
+  elementsSelectable: true,
   selectNodesOnDrag: true,
   minZoom: 0.5,
   maxZoom: 2,

src/store/index.ts

@@ -79,7 +79,9 @@ export interface StoreModel {
   snapToGrid: boolean;
   snapGrid: [number, number];
 
-  isInteractive: boolean;
+  nodesDraggable: boolean;
+  nodesConnectable: boolean;
+  elementsSelectable: boolean;
 
   reactFlowVersion: string;
 
@@ -116,6 +118,9 @@ export interface StoreModel {
   setConnectionNodeId: Action<StoreModel, SetConnectionId>;
 
   setInteractive: Action<StoreModel, boolean>;
+  setNodesDraggable: Action<StoreModel, boolean>;
+  setNodesConnectable: Action<StoreModel, boolean>;
+  setElementsSelectable: Action<StoreModel, boolean>;
 
   setUserSelection: Action<StoreModel, XYPosition>;
   updateUserSelection: Action<StoreModel, XYPosition>;
@@ -162,7 +167,9 @@ export const storeModel: StoreModel = {
   snapGrid: [16, 16],
   snapToGrid: false,
 
-  isInteractive: true,
+  nodesDraggable: true,
+  nodesConnectable: true,
+  elementsSelectable: true,
 
   reactFlowVersion: typeof __REACT_FLOW_VERSION__ !== 'undefined' ? __REACT_FLOW_VERSION__ : '-',
 
@@ -373,7 +380,21 @@ export const storeModel: StoreModel = {
   }),
 
   setInteractive: action((state, isInteractive) => {
-    state.isInteractive = isInteractive;
+    state.nodesDraggable = isInteractive;
+    state.nodesConnectable = isInteractive;
+    state.elementsSelectable = isInteractive;
+  }),
+
+  setNodesDraggable: action((state, nodesDraggable) => {
+    state.nodesDraggable = nodesDraggable;
+  }),
+
+  setNodesConnectable: action((state, nodesConnectable) => {
+    state.nodesConnectable = nodesConnectable;
+  }),
+
+  setElementsSelectable: action((state, elementsSelectable) => {
+    state.elementsSelectable = elementsSelectable;
   }),
 
   fitView: action((state, payload = { padding: 0.1 }) => {

src/style.css

@@ -112,7 +112,11 @@
   font-size: 12px;
   color: #222;
   text-align: center;
+}
 
+.react-flow__node-default.selectable,
+.react-flow__node-input.selectable,
+.react-flow__node-output.selectable {
   &.selected,
   &.selected:hover {
     box-shadow: 0 0 0 2px #555;
@@ -158,7 +162,12 @@
   width: 10px;
   height: 8px;
   background: rgba(255, 255, 255, 0.4);
-  cursor: crosshair;
+  pointer-events: none;
+
+  &.connectable {
+    pointer-events: all;
+    cursor: crosshair;
+  }
 }
 
 .react-flow__handle-bottom {

src/types/index.ts

@@ -1,4 +1,4 @@
-import { CSSProperties } from 'react';
+import { CSSProperties, MouseEvent } from 'react';
 
 export type ElementId = string;
 
@@ -94,6 +94,7 @@ export interface NodeProps {
   type: string;
   data: any;
   selected: boolean;
+  isConnectable: boolean;
   targetPosition?: Position;
   sourcePosition?: Position;
 }
@@ -102,6 +103,7 @@ export interface NodeComponentProps {
   id: ElementId;
   type: string;
   data: any;
+  isConnectable: boolean;
   selected?: boolean;
   transform?: Transform;
   xPos?: number;
@@ -109,6 +111,10 @@ export interface NodeComponentProps {
   targetPosition?: Position;
   sourcePosition?: Position;
   onClick?: (node: Node) => void;
+  onMouseEnter?: (node: Node) => void;
+  onMouseMove?: (node: Node) => void;
+  onMouseLeave?: (node: Node) => void;
+  onContextMenu?: (node: Node) => void;
   onNodeDragStart?: (node: Node) => void;
   onNodeDragStop?: (node: Node) => void;
   style?: CSSProperties;
@@ -122,9 +128,15 @@ export interface WrapNodeProps {
   transform: Transform;
   xPos: number;
   yPos: number;
-  isInteractive: boolean;
+  isSelectable: boolean;
+  isDraggable: boolean;
+  isConnectable: boolean;
   selectNodesOnDrag: boolean;
   onClick?: (node: Node) => void;
+  onMouseEnter?: (evt: MouseEvent, node: Node) => void;
+  onMouseMove?: (evt: MouseEvent, node: Node) => void;
+  onMouseLeave?: (evt: MouseEvent, node: Node) => void;
+  onContextMenu?: (evt: MouseEvent, node: Node) => void;
   onNodeDragStart?: (node: Node) => void;
   onNodeDragStop?: (node: Node) => void;
   style?: CSSProperties;
@@ -155,8 +167,10 @@ export interface Connection {
 }
 
 export enum ConnectionLineType {
-  Bezier = 'bezier',
+  Bezier = 'default',
   Straight = 'straight',
+  Step = 'step',
+  SmoothStep = 'smoothstep',
 }
 
 export type OnConnectFunc = (connection: Connection) => void;
@@ -174,6 +188,7 @@ export interface HandleElement extends XYPosition, Dimensions {
 export interface HandleProps {
   type: HandleType;
   position: Position;
+  isConnectable?: boolean;
   onConnect?: OnConnectFunc;
   isValidConnection?: (connection: Connection) => boolean;
   id?: string;

src/utils/index.ts

@@ -1,6 +1,8 @@
 import { DraggableEvent } from 'react-draggable';
 import { MouseEvent as ReactMouseEvent } from 'react';
 
+export const noop = () => {};
+
 export const isInputDOMNode = (e: ReactMouseEvent | DraggableEvent | KeyboardEvent) => {
   const target = e.target as HTMLElement;
   return e && target && ['INPUT', 'SELECT', 'TEXTAREA', 'BUTTON'].includes(target.nodeName);