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    Tree View

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    The TreeView widget can display both hierarchical and plain data. In this demo, the TreeView data source is defined using a plain object. Notice that an image can be specified within an item of the data source. The default item template contains a specific field that allows displaying images without a custom item template.
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    window.onload = function() { var productName = ko.observable(""), productPrice = ko.observable(""), productImage = ko.observable(""); var viewModel = { treeViewOptions: { items: products, dataStructure: "plain", parentIdExpr: "categoryId", keyExpr: "ID", displayExpr: "name", width: 300, onItemClick: function(e) { var item = e.itemData; if(item.price) { productImage(item.iconSrc); productName(item.name); productPrice("$" + item.price); } else { productPrice(""); } } }, productName: productName, productPrice: productPrice, productImage: productImage }; ko.applyBindings(viewModel, document.getElementById("treeview")); };
    <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <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" /> <script src="js/jquery-3.1.0.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.0/knockout-min.js"></script> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/17.1.4/css/dx.spa.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/17.1.4/css/dx.common.css" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/17.1.4/css/dx.light.css" /> <script src="https://cdn3.devexpress.com/jslib/17.1.4/js/dx.all.js"></script> <script src="data.js"></script> <link rel="stylesheet" type ="text/css" href ="styles.css" /> <script src="index.js"></script> </head> <body class="dx-viewport"> <div class="demo-container"> <div class="form" id="treeview"> <div id="simple-treeview" data-bind="dxTreeView: treeViewOptions"></div> <!-- ko if: productPrice() --> <div id="product-details"> <img src="" data-bind="attr: { src: productImage }" /> <div class="name" data-bind="text: productName"></div> <div class="price" data-bind="text: productPrice"></div> </div> <!-- /ko --> </div> </div> </body> </html>
    #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; }
    var 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", iconSrc: "../../../../images/products/1.png", price: 220 }, { ID: "1_1_1_2", categoryId: "1_1_1", name: "SuperHD Video Player", iconSrc: "../../../../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", iconSrc: "../../../../images/products/7.png", price: 1200 }, { ID: "1_1_2_2", categoryId: "1_1_2", name: "SuperLED 42", iconSrc: "../../../../images/products/5.png", price: 1450 }, { ID: "1_1_2_3", categoryId: "1_1_2", name: "SuperLED 50", iconSrc: "../../../../images/products/4.png", price: 1600 }, { ID: "1_1_2_4", categoryId: "1_1_2", name: "SuperLCD 55", iconSrc: "../../../../images/products/6.png", price: 1750 }, { ID: "1_1_2_5", categoryId: "1_1_2", name: "SuperLCD 70", iconSrc: "../../../../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", iconSrc: "../../../../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", iconSrc: "../../../../images/products/14.png", price: 550 }, { ID: "1_1_4_2", categoryId: "1_1_4", name: "Projector PlusHD", iconSrc: "../../../../images/products/15.png", price: 750 } ];