Adding Controls To Templates in Windows Store Apps

Introduction

In this article I describe how to create Windows Store Apps for adding controls to a Template using JavaScript. This app embeds a ratings control and displays the rating supplied by the data. This page uses a JavaScript function to template the items, which enables event listeners to be attached to individual items.

I assume you can create a simple Windows Store App using JavaScript; for more help visit Simple Windows Store Apps using JavaScript.

To start the creation of the apps, add one JavaScript page by right-clicking on the js folder in the Solution Explorer and select "Add" > "New item" > "JavaScript Page" and then provide an appropriate name. In the same way, add a HTML page to your project.

Write the following code in the default.html:

<!DOCTYPE html>

<html>

<head>

</head>

</div>

</center>

</body>

</html>

Write the following code in the default.js:

(function () {

"use strict";

var appTitle = "";

var pages = [

{ url: "page.html" }

];

function activated(eventObject) {

if (eventObject.detail.kind === Windows.ApplicationModel.Activation.ActivationKind.launch) {

eventObject.setPromise(WinJS.UI.processAll().then(function () {

var url = WinJS.Application.sessionState.lastUrl || pages[0].url;

return WinJS.Navigation.navigate(url);

}));

}

WinJS.Navigation.addEventListener("navigated", function (eventObject) {

var url = eventObject.detail.location;

var host = document.getElementById("contentHost");

host.winControl && host.winControl.unload && host.winControl.unload();

WinJS.Utilities.empty(host);

eventObject.detail.setPromise(WinJS.UI.Pages.render(url, host, eventObject.detail.state).then(function () {

WinJS.Application.sessionState.lastUrl = url;

}));

});

WinJS.Namespace.define("App", {

appTitle: appTitle,

pages: pages

});

WinJS.Application.addEventListener("activated", activated, false);

WinJS.Application.start();

})();

Write the following code in the Page.html:

<!DOCTYPE html>

<html>

<head>

</head>

<body>

</div>

<div id="listView"

class="win-selectionstylefilled"

data-win-control="WinJS.UI.ListView"

data-win-options="{

itemDataSource: myDataWithRatings.dataSource,

itemTemplate: MyInteractiveTemplate,

selectionMode: 'none',

tapBehavior: 'none',

swipeBehavior: 'none',

layout: { type: WinJS.UI.GridLayout }

}">

</div>

</body>

</html>

Write the following code in the Script.js:

var MyInteractiveTemplate = WinJS.Utilities.markSupportedForProcessing(function MyInteractiveTemplate(itemPromise) {

return itemPromise.then(function (currentItem) {

var result = document.createElement("div");

result.className = "regularListIconTextItem";

result.style.overflow = "hidden";

var image = document.createElement("img");

image.className = "regularListIconTextItem-Image";

image.src = currentItem.data.picture;

result.appendChild(image);

var body = document.createElement("div");

body.className = "regularListIconTextItem-Detail";

body.style.overflow = "hidden";

result.appendChild(body);

var title = document.createElement("h4");

title.innerText = currentItem.data.title;

body.appendChild(title);

var ratingsControl = new WinJS.UI.Rating();

WinJS.Utilities.addClass(ratingsControl.element, "win-interactive");

body.appendChild(ratingsControl.element);

var currentRating = currentItem.data.rating;

if (typeof (currentItem.data.userRating) === "number") {

ratingsControl.userRating = currentRating;

} else {

ratingsControl.averageRating = currentRating;

}

ratingsControl.addEventListener("change", function (eventObject) {

var newRating = eventObject.detail.tentativeRating;

currentItem.data.rating = newRating;

currentItem.data.userRating = newRating;

WinJS.log && WinJS.log("Rating for " + currentItem.data.title + " changed to " + newRating, "app", "status");

});

return result;

});

var myDataWithRatings = new WinJS.Binding.List([

{ title: "Lenovo", text: "Lenovo", picture: "images/1.jpg", rating: 3 },

{ title: "HP", text: "HP", picture: "images/2.jpg", rating: 1 },

{ title: "Samsung", text: "Samsung", picture: "images/3.jpg", rating: 1 },

{ title: "Dell", text: "Dell", picture: "images/4.jpg", rating: 2 },

]);

Output:

Summary:

In this article I described how to create a Windows Store App for adding controls to a Template using JavaScript. I hope this article has helped you to understand this topic. Please share it. If you know more about this, your feedback and constructive contributions are welcome.