Introduction
In this article I describe how to create a Windows Store App for Cell Spanning using JavaScript. The custom template function "MyCellSpanningJSTemplate", uses the "type" field to style each item in its proper size. A "groupInfo" property must be provided on the layout of the List View to enable cell spanning.
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 app, 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.
![template-spanning-in-windows-store-apps.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">
<div id="rootGrid">
<div id="content">
<h1 id="featureLabel"></h1>
<div id="contentHost"></div>
</div>
</div>
</body>
</html>
Write the following code in the default.js
(function () {
"use strict";
var appTitle = "";
var page = [
{ 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 || page[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,
page: page
});
WinJS.Application.addEventListener("activated", activated, false);
WinJS.Application.start();
})();
Write the following code in the page.html
<!DOCTYPE html>
<html>
<head>
<title></title>
<link rel="stylesheet" href="/css/scenario4.css" />
<script src="/js/script.js"></script>
</head>
<body>
<div data-win-control="App.ScenarioInput">
</div>
<div data-win-control="App.ScenarioOutput">
<div id="listView"
data-win-control="WinJS.UI.ListView"
data-win-options="{
itemDataSource: myCellSpanningData.dataSource,
itemTemplate: MyCellSpanningJSTemplate,
selectionMode: 'none',
tapBehavior: 'none',
swipeBehavior: 'none',
layout: {
groupInfo: groupInfo,
type: WinJS.UI.GridLayout
}
}">
</div>
</div>
</body>
</html>
Write the following code in the script.js
var MyCellSpanningJSTemplate = WinJS.Utilities.markSupportedForProcessing(function MyCellSpanningJSTemplate(itemPromise) {
return itemPromise.then(function (currentItem) {
var result = document.createElement("div");
result.className = currentItem.data.type;
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 fulltext = document.createElement("h6");
fulltext.innerText = currentItem.data.text;
body.appendChild(fulltext);
return result;
});
});
(function () {
"use strict";
var page = WinJS.UI.Pages.define("page.html", {
ready: function (element, options) {
element.querySelector("#listView").winControl.forceLayout();
}
});
})();
var groupInfo = WinJS.Utilities.markSupportedForProcessing(function groupInfo() {
return {
enableCellSpanning: true,
cellWidth: 310,
cellHeight: 80
};
});
var myCellSpanningData = new WinJS.Binding.List([
{ title: "Employee", text: "Employee", picture: "images/1.jpg", type: "smallListIconTextItem" },
{ title: "Employee", text: "Employee", picture: "images/2.jpg", type: "mediumListIconTextItem" },
{ title: "Employee", text: "Employee", picture: "images/3.jpg", type: "largeListIconTextItem" },
{ title: "Employee", text: "Employee", picture: "images/4.jpg", type: "mediumListIconTextItem" },
]);
Output
![template-spanning-in-window-store-app.jpg]()
Summary
In this article I described how to create a Windows Store App for Cell Spanning 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.