Customize Item Appearance

For a minor customization of RadioGroup items, you can use the default item template. This template defines the appearance of an item depending on whether specific fields are present or absent from the item's data object. For example, the following code generates three radio buttons: the first is disabled, the second is not customized, the third is hidden.

JavaScript
$(function() {
    $("#radioGroupContainer").dxRadioGroup({
        dataSource: [
            { text: "Low", disabled: true },
            { text: "High" },
            { text: "Urgent", visible: false }
        ]
    });
});

Using the default item template is the easiest way to customize an item, but it lacks flexibility. Instead, you can define a custom template. For AngularJS and Knockout apps, DevExtreme provides a markup component called dxTemplate. The following code gives a simple example of how you can use dxTemplate to customize radio buttons.

AngularJS

HTML
<div ng-controller="DemoController">
   <div dx-radio-group="{
       dataSource: dataItems, 
       itemTemplate: 'customItemTemplate'
    }" dx-item-alias="item">
        <div data-options="dxTemplate: { name: 'customItemTemplate' }">
            <div ng-style="{ color: item.color }">{{ item.text }}</div>
        </div>    
    </div>
</div>
JavaScript
angular.module('DemoApp', ['dx'])
    .controller('DemoController', function ($scope) {
        $scope.dataItems = [
            { text: "Low", color: "grey" },
            { text: "Normal", color: "green" },
            { text: "Urgent", color: "yellow" },
            { text: "High", color: "red" }
        ];
    });

NOTE: The dx-item-alias directive specifies the variable that is used to access the item object.

Knockout

HTML
<div data-bind="dxRadioGroup: {
    dataSource: dataItems,
    itemTemplate: 'customItemTemplate'
}">
    <div data-options="dxTemplate: { name: 'customItemTemplate' }">
        <div data-bind="text: text, style: { color: color }"></div>
    </div>
</div>
JavaScript
var viewModel = {
    dataItems: [
        { text: "Low", color: "grey" },
        { text: "Normal", color: "green" },
        { text: "Urgent", color: "yellow" },
        { text: "High", color: "red" }
    ]
};

ko.applyBindings(viewModel);

If you use jQuery alone, combine the HTML markup for items manually with jQuery DOM manipulation methods. To apply this markup, use the itemTemplate callback function as shown in the following code.

JavaScript
$(function() {
    $("#radioGroupContainer").dxRadioGroup({
        dataSource: [
            { text: "Low", color: "grey" },
            { text: "Normal", color: "green" },
            { text: "Urgent", color: "yellow" },
            { text: "High", color: "red" }
        ],
        itemTemplate: function(itemData, itemIndex, itemElement){
            itemElement.append(
                $("<div />").attr("style", "color:" + itemData.color )
                            .text(itemData.text)
            );
        }
    });
});

You can also customize an individual item. For this purpose, declare a template for it as a script and pass its id to the template.

HTML
<script id="individualTemplate" type="text/html">
    <!-- ... -->
</script>
JavaScript
var radioGroupItems = [{
    text: "Low",
    template: $("#individualTemplate")
},
// ...
];

In addition, you can use a 3rd-party template engine to customize widget appearance. For more information, see the Use an Alternative Template Engine article.

See Also