Page Rating in Windows Store Apps Using JavaScript

Deepak Middha
Oct 02, 2012
8k
0
0
Article

Introduction

Today we are going to learn how to create Windows Store Apps for Page Rating using JavaScript. The Rating control shows the average rating of an item until the user provides his or her own rating.

The user can clear his or her previous rating by dragging to the left of the control using a mouse, touch or pressing the "0" key or left arrow key. If your page doesn't want to allow that, you could disable it. 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 two JavaScript pages by right-clicking on the js folder in the Solution Explorer and select Add > new item > JavaScript Page and then give an appropriate name. In the same way, add one HTML pages to your project.

Write the following code in default.aspx:

<!DOCTYPE html>

<html>

<head>

<title>Rating</title>

</head>

</div>

</center>

</body>

</html>

Write the following code in default.js:

(function () {

"use strict";

var sampleTitle = "Rating";

var pages = [

{ url: "page.html", title: "Basics" }

];

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 (evt) {

var url = evt.detail.location;

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

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

WinJS.Utilities.empty(host);

WinJS.UI.Pages.render(url, host).then(function () {

WinJS.Application.sessionState.lastUrl = url;

});

WinJS.Namespace.define("SdkSample", {

sampleTitle: sampleTitle,

pages: pages

});

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

WinJS.Application.start();

})();

function switchStyleDark() {

document.styleSheets[0].disabled = true;

document.styleSheets[3].disabled = false;

WinJS.Utilities.removeClass(document.body, "ui-light");

WinJS.Utilities.addClass(document.body, "ui-dark");

}

function switchStyleLight() {

document.styleSheets[0].disabled = false;

document.styleSheets[3].disabled = true;

WinJS.Utilities.removeClass(document.body, "ui-dark");

WinJS.Utilities.addClass(document.body, "ui-light");

}

Write the following code in page.html:

<!DOCTYPE html>

<html>

<head>

</head>

<body>

<legend class="controlGroupName">Switch Stylesheet</legend>

<input type="radio" name="radiogroup1" id="lightStyle" title="Use this Control to switch between the light and dark styles to see how the controls look." onclick="switchStyleLight();" />Light

</label>

<input type="radio" name="radioGroup1" id="darkStyle" title="Use this control to switch between the light and dark styles to see how the controls look." onclick="switchStyleDark();" />Dark

</label>

</fieldset>

</div>

Average rating

averageRating: 3.4 </div>

</div>

</div>

User rating

averageRating: 3.4, userRating: 4</div>

</div>

</div>

Disabled

averageRating: 3.4, disabled: true</div>

</div>

</div>

Customized tooltip

tooltipStrings:['Horrible','Poor','Fair','Good','Excellent','Delete']</div>

</div>

</div>

Number of stars

maxRating: 10</div>

</div>

</div>

Disable the ability to clear rating

enableClear: false</div>

</div>

</div>

</fieldset>

</div>

</body>

</html>

Write the following code in script.js:

(function () {

"use strict";

var page = WinJS.UI.Pages.define("page.html", {

ready: function (element, options) {

if (document.styleSheets[3].disabled === true) {

document.getElementById("darkStyle").checked = false;

document.getElementById("lightStyle").checked = true;

} else if (document.styleSheets[0].disabled === true) {

document.getElementById("darkStyle").checked = true;

document.getElementById("lightStyle").checked = false;

}

});

function changeRating(ev) {

var obj = ev.target.winControl;

if (obj) {

console.log("Rating changed. User rating: " + obj.userRating);

}

WinJS.Namespace.define("basics", { changeRating: changeRating });

WinJS.Utilities.markSupportedForProcessing(changeRating);

})();

Write the following code in script1.js:

(function () {

var pageOutput = WinJS.Class.define(

function (element, options) {

element.winControl = this;

this.element = element;

new WinJS.Utilities.QueryCollection(element)

.setAttribute("role", "region")

.setAttribute("aria-labelledby", "outputLabel")

.setAttribute("aria-live", "assertive");

element.id = "output";

this._addOutputLabel(element);

this._addStatusOutput(element);

}, {

_addOutputLabel: function (element) {

var label = document.createElement("h2");

label.id = "outputLabel";

label.textContent = "Output";

element.parentNode.insertBefore(label, element);

_addStatusOutput: function (element) {

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

statusDiv.id = "statusMessage";

element.insertBefore(statusDiv, element.childNodes[0]);

}

);

var currentpageUrl = null;

WinJS.Navigation.addEventListener("navigating", function (evt) {

currentpageUrl = evt.detail.location;

});

WinJS.log = function (message, tag, type) {

var isError = (type === "error");

var isStatus = (type === "status");

if (isError || isStatus) {

var statusDiv =document.getElementById("statusMessage");

statusDiv.innerText = message;

}

};

})();

Output

Summary

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