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Tree View

Plain Data Structure

Documentation

The TreeView's plain (one-dimensional) array contains items each of which references its parent item. Use either of the following properties to bind the component to plain data:

  • items[]
    Assigns a local array as shown in this demo.

  • dataSource
    Assigns a DataSource object that allows you to perform data shaping operations and use a remote source.

Each object in the TreeView's plain data structure should include the following fields:

  • id
    Unique item identifier.

  • parentId
    Identifier of the parent item.

  • text
    Text displayed by the item.

You can respectively use the keyExpr, parentIdExpr, and displayExpr properties to specify custom names for the above-mentioned fields. Node objects can also include developer-defined fields and properties from this help section: items[].

In this demo, nodes use the icon and expanded properties. These properties specify the icon and whether a node is collapsed or expanded. Some nodes also include the developer-defined price field.

Backend API
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<template> <div class="form"> <DxTreeView id="simple-treeview" :items="products" :width="300" data-structure="plain" parent-id-expr="categoryId" key-expr="ID" display-expr="name" @item-click="selectItem" /> <div v-if="currentItem.price" id="product-details" > <img :src="currentItem.icon"> <div class="name">{{ currentItem.name }}</div> <div class="price">{{ "$" + currentItem.price }}</div> </div> </div> </template> <script> import DxTreeView from 'devextreme-vue/tree-view'; import service from './data.js'; export default { components: { DxTreeView, }, data() { const products = service.getProducts(); return { products, currentItem: products[0], }; }, methods: { selectItem(e) { this.currentItem = e.itemData; }, }, }; </script> <style scoped> #simple-treeview, #product-details { display: inline-block; } #product-details { vertical-align: top; width: 400px; height: 420px; margin-left: 20px; } #product-details > img { border: none; height: 300px; width: 400px; } #product-details > .name { text-align: center; font-size: 20px; } #product-details > .price { text-align: center; font-size: 24px; } .dark #product-details > div { color: #f0f0f0; } .hidden { visibility: hidden; } </style>
import { createApp } from 'vue'; import App from './App.vue'; createApp(App).mount('#app');
<!DOCTYPE html> <html> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.2.3/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.2.3/css/dx.light.css" /> <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script type="text/javascript" src="config.js"></script> <script type="text/javascript"> System.import("./index.js"); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"> </div> </div> </body> </html>
const products = [{ ID: '1', name: 'Stores', expanded: true, }, { ID: '1_1', categoryId: '1', name: 'Super Mart of the West', expanded: true, }, { ID: '1_1_1', categoryId: '1_1', name: 'Video Players', }, { ID: '1_1_1_1', categoryId: '1_1_1', name: 'HD Video Player', icon: '../../../../images/products/1.png', price: 220, }, { ID: '1_1_1_2', categoryId: '1_1_1', name: 'SuperHD Video Player', icon: '../../../../images/products/2.png', price: 270, }, { ID: '1_1_2', categoryId: '1_1', name: 'Televisions', expanded: true, }, { ID: '1_1_2_1', categoryId: '1_1_2', name: 'SuperLCD 42', icon: '../../../../images/products/7.png', price: 1200, }, { ID: '1_1_2_2', categoryId: '1_1_2', name: 'SuperLED 42', icon: '../../../../images/products/5.png', price: 1450, }, { ID: '1_1_2_3', categoryId: '1_1_2', name: 'SuperLED 50', icon: '../../../../images/products/4.png', price: 1600, }, { ID: '1_1_2_4', categoryId: '1_1_2', name: 'SuperLCD 55', icon: '../../../../images/products/6.png', price: 1750, }, { ID: '1_1_2_5', categoryId: '1_1_2', name: 'SuperLCD 70', icon: '../../../../images/products/9.png', price: 4000, }, { ID: '1_1_3', categoryId: '1_1', name: 'Monitors', }, { ID: '1_1_3_1', categoryId: '1_1_3', name: '19"', }, { ID: '1_1_3_1_1', categoryId: '1_1_3_1', name: 'DesktopLCD 19', icon: '../../../../images/products/10.png', price: 160, }, { ID: '1_1_4', categoryId: '1_1', name: 'Projectors', }, { ID: '1_1_4_1', categoryId: '1_1_4', name: 'Projector Plus', icon: '../../../../images/products/14.png', price: 550, }, { ID: '1_1_4_2', categoryId: '1_1_4', name: 'Projector PlusHD', icon: '../../../../images/products/15.png', price: 750, }, ]; export default { getProducts() { return products; }, };
window.config = { transpiler: 'plugin-babel', meta: { '*.vue': { loader: 'vue-loader', }, 'devextreme/localization.js': { 'esModule': true, }, }, paths: { 'npm:': 'https://unpkg.com/', }, map: { 'vue': 'npm:vue@3.0.0/dist/vue.esm-browser.js', 'vue-loader': 'npm:dx-systemjs-vue-browser@1.0.15/index.js', 'mitt': 'npm:mitt/dist/mitt.umd.js', 'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.28.0/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@21.2.3/cjs', 'devextreme-vue': 'npm:devextreme-vue@21.2.3', 'jszip': 'npm:jszip@3.7.1/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.5.5/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.1.37/dist/dx-diagram.js', 'devexpress-gantt': 'npm:devexpress-gantt@3.1.24/dist/dx-gantt.js', '@devextreme/vdom': 'npm:@devextreme/vdom@2.2.3', '@devextreme/runtime': 'npm:@devextreme/runtime@2.3.8', 'inferno': 'npm:inferno@7.4.10/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat@7.4.10/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.10/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom@1.0.7/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate@7.4.10/dist/inferno-hydrate.min.js', 'inferno-clone-vnode': 'npm:inferno-clone-vnode@7.4.10/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class@7.4.10/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras@7.4.10/dist/inferno-extras.min.js', 'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js', }, packages: { 'devextreme-vue': { main: 'index.js', }, 'devextreme': { defaultExtension: 'js', }, '@devextreme/vdom': { defaultExtension: 'js', }, 'devextreme/events/utils': { main: 'index', }, 'devextreme/events': { main: 'index', }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js', }, }, packageConfigPaths: [ 'npm:@devextreme/*/package.json', 'npm:@devextreme/runtime@2.3.8/inferno/package.json', ], babelOptions: { sourceMaps: false, stage0: true, }, }; System.config(window.config);