Merge pull request #1269 from rackt/tree-view-example

Add tree view example

Author: gaearon

README.md

@@ -160,6 +160,7 @@ For PDF, ePub, and MOBI exports for offline reading, and instructions on how to
 * [Universal](http://rackt.github.io/redux/docs/introduction/Examples.html#universal) ([source](https://github.com/rackt/redux/tree/master/examples/universal))
 * [Real World](http://rackt.github.io/redux/docs/introduction/Examples.html#real-world) ([source](https://github.com/rackt/redux/tree/master/examples/real-world))
 * [Shopping Cart](http://rackt.github.io/redux/docs/introduction/Examples.html#shopping-cart) ([source](https://github.com/rackt/redux/tree/master/examples/shopping-cart))
+* [Tree View](http://rackt.github.io/redux/docs/introduction/Examples.html#tree-view) ([source](https://github.com/rackt/redux/tree/master/examples/tree-view))
 
 If you’re new to the NPM ecosystem and have troubles getting a project up and running, or aren’t sure where to paste the gist above, check out [simplest-redux-example](https://github.com/jackielii/simplest-redux-example) that uses Redux together with React and Browserify.
 

docs/introduction/Examples.md

@@ -153,6 +153,29 @@ It covers:
 * Using only [React Redux](https://github.com/rackt/react-redux) to bind action creators 
 * Conditional middleware (logging example)
 
+## Tree View
+
+Run the [Tree View](https://github.com/rackt/redux/tree/master/examples/tree-view) example:
+
+```
+git clone https://github.com/rackt/redux.git
+
+cd redux/examples/tree-view
+npm install
+npm start
+
+open http://localhost:3000/
+```
+
+This is an example of performant rendering.
+
+It covers:
+
+* Normalized state
+* Reducer composition
+* State representing a tree view
+* Granual re-rendering of a large subtree
+
 ## More Examples
 
 You can find more examples in [Awesome Redux](https://github.com/xgrommx/awesome-redux).

examples/tree-view/.babelrc

@@ -0,0 +1,19 @@
+{
+  "stage": 2,
+  "env": {
+    "development": {
+      "plugins": [
+        "react-transform"
+      ],
+      "extra": {
+        "react-transform": {
+          "transforms": [{
+            "transform": "react-transform-hmr",
+            "imports": ["react"],
+            "locals":  ["module"]
+          }]
+        }
+      }
+    }
+  }
+}

examples/tree-view/actions/index.js

@@ -0,0 +1,26 @@
+export const INCREMENT = 'INCREMENT'
+export const CREATE_NODE = 'CREATE_NODE'
+export const ADD_CHILD = 'ADD_CHILD'
+
+export function increment(nodeId) {
+  return {
+    type: INCREMENT,
+    nodeId
+  }
+}
+
+let nextId = 0
+export function createNode() {
+  return {
+    type: CREATE_NODE,
+    nodeId: `new_${nextId++}`
+  }
+}
+
+export function addChild(nodeId, childId) {
+  return {
+    type: ADD_CHILD,
+    nodeId,
+    childId
+  }
+}

examples/tree-view/containers/Node.js

@@ -0,0 +1,61 @@
+import React from 'react'
+import { Component } from 'react'
+import { connect } from 'react-redux'
+import * as actions from '../actions'
+
+class Node extends Component {
+  constructor(props) {
+    super(props)
+    this.handleIncrementClick = this.handleIncrementClick.bind(this)
+    this.handleAddChildClick = this.handleAddChildClick.bind(this)
+  }
+
+  handleIncrementClick() {
+    const { increment, id } = this.props
+    increment(id)
+  }
+
+  handleAddChildClick(e) {
+    e.preventDefault()
+
+    const { addChild, createNode, id } = this.props
+    const childId = createNode().nodeId
+    addChild(id, childId)
+  }
+
+  renderChild(childId) {
+    return (
+      <li key={childId}>
+        <ConnectedNode id={childId} />
+      </li>
+    )
+  }
+
+  render() {
+    const { counter, childIds } = this.props
+    return (
+      <div>
+        Counter: {counter}
+        {' '}
+        <button onClick={this.handleIncrementClick}>
+          +
+        </button>
+        <ul>
+          {childIds.map(this.renderChild)}
+          <li key='add'>
+            <a href='#' onClick={this.handleAddChildClick}>
+              Add child
+            </a>
+          </li>
+        </ul>
+      </div>
+    )
+  }
+}
+
+function mapStateToProps(state, ownProps) {
+  return state[ownProps.id]
+}
+
+const ConnectedNode = connect(mapStateToProps, actions)(Node)
+export default ConnectedNode

examples/tree-view/generateTree.js

@@ -0,0 +1,21 @@
+export default function generateTree() {
+  let tree = {
+    0: {
+      id: 0,
+      counter: 0,
+      childIds: []
+    }
+  }
+
+  for (let i = 1; i < 1000; i++) {
+    let parentId = Math.floor(Math.pow(Math.random(), 2) * i)
+    tree[i] = {
+      id: i,
+      counter: 0,
+      childIds: []
+    }
+    tree[parentId].childIds.push(i)
+  }
+
+  return tree
+}

examples/tree-view/index.html

@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>Redux tree-view example</title>
+  </head>
+  <body>
+    <div id="root">
+    </div>
+    <script src="/static/bundle.js"></script>
+  </body>
+</html>

examples/tree-view/index.js

@@ -0,0 +1,16 @@
+import React from 'react'
+import { render } from 'react-dom'
+import { Provider } from 'react-redux'
+import Node from './containers/Node'
+import configureStore from './store/configureStore'
+import generateTree from './generateTree'
+
+const tree = generateTree()
+const store = configureStore(tree)
+
+render(
+  <Provider store={store}>
+    <Node id={0} />
+  </Provider>,
+  document.getElementById('root')
+)

examples/tree-view/package.json

@@ -0,0 +1,37 @@
+{
+  "name": "redux-tree-view-example",
+  "version": "0.0.0",
+  "description": "Redux tree-view example",
+  "scripts": {
+    "start": "node server.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/rackt/redux.git"
+  },
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/rackt/redux/issues"
+  },
+  "homepage": "http://rackt.github.io/redux",
+  "dependencies": {
+    "react": "^0.14.6",
+    "react-dom": "^0.14.6",
+    "react-redux": "^4.0.6",
+    "redux": "^3.0.6"
+  },
+  "devDependencies": {
+    "babel-core": "^5.6.18",
+    "babel-loader": "^5.1.4",
+    "babel-plugin-react-transform": "^1.1.0",
+    "expect": "^1.6.0",
+    "express": "^4.13.3",
+    "jsdom": "^5.6.1",
+    "mocha": "^2.2.5",
+    "node-libs-browser": "^0.5.2",
+    "react-transform-hmr": "^1.0.0",
+    "webpack": "^1.9.11",
+    "webpack-dev-middleware": "^1.2.0",
+    "webpack-hot-middleware": "^2.2.0"
+  }
+}

examples/tree-view/reducers/index.js

@@ -0,0 +1,34 @@
+import { INCREMENT, ADD_CHILD, CREATE_NODE } from '../actions'
+
+function node(state, action) {
+  switch (action.type) {
+    case CREATE_NODE:
+      return {
+        id: action.nodeId,
+        counter: 0,
+        childIds: []
+      }
+    case INCREMENT:
+      return Object.assign({}, state, {
+        counter: state.counter + 1
+      })
+    case ADD_CHILD:
+      return Object.assign({}, state, {
+        childIds: [ ...state.childIds, action.childId ]
+      })
+    default:
+      return state
+  }
+}
+
+export default function (state = {}, action) {
+  const { nodeId } = action
+  if (typeof nodeId === 'undefined') {
+    return state
+  }
+
+  return Object.assign({}, state, {
+    [nodeId]: node(state[nodeId], action)
+  })
+}
+

examples/tree-view/server.js

@@ -0,0 +1,23 @@
+var webpack = require('webpack')
+var webpackDevMiddleware = require('webpack-dev-middleware')
+var webpackHotMiddleware = require('webpack-hot-middleware')
+var config = require('./webpack.config')
+
+var app = new (require('express'))()
+var port = 3000
+
+var compiler = webpack(config)
+app.use(webpackDevMiddleware(compiler, { noInfo: true, publicPath: config.output.publicPath }))
+app.use(webpackHotMiddleware(compiler))
+
+app.get("/", function(req, res) {
+  res.sendFile(__dirname + '/index.html')
+})
+
+app.listen(port, function(error) {
+  if (error) {
+    console.error(error)
+  } else {
+    console.info("==> 🌎  Listening on port %s. Open up http://localhost:%s/ in your browser.", port, port)
+  }
+})

examples/tree-view/store/configureStore.js

@@ -0,0 +1,16 @@
+import { createStore } from 'redux'
+import reducer from '../reducers'
+
+export default function configureStore(initialState) {
+  const store = createStore(reducer, initialState)
+
+  if (module.hot) {
+    // Enable Webpack hot module replacement for reducers
+    module.hot.accept('../reducers', () => {
+      const nextReducer = require('../reducers')
+      store.replaceReducer(nextReducer)
+    })
+  }
+
+  return store
+}

examples/tree-view/webpack.config.js

@@ -0,0 +1,47 @@
+var path = require('path')
+var webpack = require('webpack')
+
+module.exports = {
+  devtool: 'cheap-module-eval-source-map',
+  entry: [
+    'webpack-hot-middleware/client',
+    './index'
+  ],
+  output: {
+    path: path.join(__dirname, 'dist'),
+    filename: 'bundle.js',
+    publicPath: '/static/'
+  },
+  plugins: [
+    new webpack.optimize.OccurenceOrderPlugin(),
+    new webpack.HotModuleReplacementPlugin(),
+    new webpack.NoErrorsPlugin()
+  ],
+  module: {
+    loaders: [
+      {
+        test: /\.js$/,
+        loaders: [ 'babel' ],
+        exclude: /node_modules/,
+        include: __dirname
+      }
+    ]
+  }
+}
+
+
+// When inside Redux repo, prefer src to compiled version.
+// You can safely delete these lines in your project.
+var reduxSrc = path.join(__dirname, '..', '..', 'src')
+var reduxNodeModules = path.join(__dirname, '..', '..', 'node_modules')
+var fs = require('fs')
+if (fs.existsSync(reduxSrc) && fs.existsSync(reduxNodeModules)) {
+  // Resolve Redux to source
+  module.exports.resolve = { alias: { 'redux': reduxSrc } }
+  // Compile Redux from source
+  module.exports.module.loaders.push({
+    test: /\.js$/,
+    loaders: [ 'babel' ],
+    include: reduxSrc
+  })
+}