Reader Level:
Articles

Binding.List in Windows Store App

By Deepak Arora on January 09, 2013
In this article I describe how to create a Windows Store App for Binding.List using JavaScript.
  • 0
  • 0
  • 2602

Introduction

In this article I describe how to create a Windows Store App for Binding.List using JavaScript. Binding.List is an in-memory data source with an API like JavaScript Arrays. The App generates a set of random letters and uses a Binding.List to store them.

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.

binding-list_in-windows-store-app.jpg

Write the following code in the default.html:

<!DOCTYPE html>

<html>

<head>

    <meta charset="utf-8" />

    <title></title>

    <link rel="stylesheet" href="//Microsoft.WinJS.1.0/css/ui-light.css" />

    <script src="//Microsoft.WinJS.1.0/js/base.js"></script>

    <script src="//Microsoft.WinJS.1.0/js/ui.js"></script>

    <link rel="stylesheet" href="/css/default.css" />

    <script src="/js/default.js"></script>

</head>

<body role="application"style="background-color:lightpink">

    <center><div id="rootGrid">

        <div id="content">

            <h1 id="featureLabel"></h1>

            <div id="contentHost"></div>

        </div>

    </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).done(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>

    <title></title>

    <script src="/js/script.js"></script>

</head>

<body>

    <div data-win-control="App.pageInput">

        <div>

            <button id="shuffle" class="action secondary">

                Shuffle Letter

            </button>           

            <button id="addlatter" class="action secondary">

                Add letter

            </button>

        </div>

    </div>

    <div data-win-control="App.pageOutput">

        <div id="latterTemplate" data-win-control="WinJS.Binding.Template">

            <div class="latterTempl">

                <h6 class="counter" data-win-bind="innerText: counter"></h6>

                <h1 class="letter" data-win-bind="innerText: letter"></h1>

            </div>

        </div>

        <div id="listView2" class="box win-selectionstylefilled" data-win-control="WinJS.UI.ListView" data-win-options="{ selectionMode: 'multi', reorderable: true,  layout: { type: WinJS.UI.GridLayout, maxRows: 1 } }">

        </div>

    </div>

</body>

</html> 


Write the following code in the script.js:

(function () {

    "use strict";

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

        ready: function (element, options) {

            element.querySelector("#shuffle").addEventListener("click", shufflelatters, false);

            element.querySelector("#addlatter").addEventListener("click", addlatter, false);

            initlatters();

        }

    });

    var _tIndex = 0;

    var _letterSrc = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".split("");

    var lettersList = {};

    function initlatters() {

        var letters = [];

        for (var i = 0; i < 7; i++) {

            letters[i] = generatelatter();

        }

        lettersList = new WinJS.Binding.List(letters);

        var list2 = document.getElementById("listView2").winControl;

        list2.itemDataSource = lettersList.dataSource;

        list2.itemTemplate = document.getElementById("latterTemplate");

        list2.forceLayout();

    }

    function generatelatter() {

        var latter = {

            letter: _letterSrc[Math.floor(Math.random() * _letterSrc.length)],

            counter: _tIndex

        };

        _tIndex++;

 

        return latter;

    }

    function shufflelatters() {

        var count = lettersList.length;

        if (count > 0) {

            for (var itemIndex = 0; itemIndex < count; itemIndex++) {

                var randomIndex = Math.floor(Math.random() * (count - itemIndex));

                lettersList.move(randomIndex, 0);

            }

        }

    }

    function addlatter() {

        var latter = generatelatter();

        lettersList.push(latter);

    }

})(); 


Output:

binding-list_in-windows-store--app.jpg

Summary

In this article I described how to create a Windows Store App for Binding.List 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.

COMMENT USING

Trending up