I am new in GWT. Is this possible to create multiple HTML pages in GWT? and if can create, than it is relevant to create page?
If you find any html page in gwt, you will find two entries which is common to all html page of gwt.
That is below.
<script type="text/javascript" language="javascript" src="{modulename}/{modulename}.nocache.js"></script>
<body>
<iframe src="javascript:''" id="__gwt_historyFrame" tabIndex='-1' style="position:absolute;width:0;height:0;border:0"></iframe>
</body>
It loads module.cache.js into iframe.
So In short gwt work on one page only. it is single page application.
Refer: how you can do multipage in gwt?
If your objective is to have multiple page patterns for the same GWT application, you can create multiple pages, GWT won't prevent you from doing that (it doesn't even know it is called from different HTML pages).
So technically it is possible, now it is said, I won't recommend you doing that. You'd rather do different css files and swap between them. It will be easier to maintain your app.
Related
I am trying to understand what kind of web applications Apache Wicket is suitable for, and it seems to be page based from what I have seen. How can it be used to make single page web apps as well?
At our company we have 3 SPA built on Wicket. They all work :) Basiclly our structure is:
<html>
<head>
</head>
<body>
<div wicket;id="menu">
<!-- navi links -->
</div>
<div wicket:id="main">
</div>
</body>
</html>
And we replace the main panel and it's inside panels effectivly getting an SPA.
Ajax support in Wicket 6 is very good.
Yes, its basically for page based webapps. So, it can also be used easily form single page web app.
I suggest just reading this short example of Hello world
After that, you can easily edit your equivalent of HelloWorld.html and HelloWorld.java to make really easy HTML in Java.
I have a pure GWT based website and as we are aware the search engines cannot index pure gwt based websites. Thus, I have created an alternate web page as shown below which is stored as a separate html in the war folder. The purpose of this webpage is to enlist and index details regarding my website. This page is never displayed on my website, but instead is meant only for indexing. The url leading to this web page is part of the Sitemaps.xml. Thus I am assuming that the below html will be indexed because it's a part of Sitemaps. So here are my questions:
Will the content I give in the div with id "crawler" be indexed given the fact that it is scheduled for removal onload and that the browser is redirected to another url on load?
Is there a better way to get the content indexed for a pure GWT website which does not have any html based user interface?
I can also have urls that will invoke a servlet and return a response that is meant for indexing. But then the same url will be displayed in search results, which is not useful. In other words, I am trying to figure out a way in which the content gets indexed, but when the user clicks the search result he should be redirected to the home page instead of showing the indexed content.
<head>
<script>
function load(){
element = document.getElementById("crawler");
element.parentNode.removeChild(element);
window.location.href='http://<mysite>.com';
}
</script>
</head>
<body onLoad='load()'>
<div id="crawler">
<CONTENT TO BE INDEXED>......
</div>
</body>
As you can see here the div (crawler) that contains all the content that is meant for indexing, is removed as soon as the body loads. Apart from this the page also redirects to the home page of the site on load.
The crawler will read in the entire contents of the page for indexing, so it will have no trouble picking up the portion within the div. The onload is not executed by the crawler prior to reading the page.
A method I have used in the past was to generate static html versions of the pages and reference these through the sitemap.xml. Users landing on the html page would then be directed to the equivalent dynamic page when they click on a link (ie: Buy or Specifications). This worked well for search engine placement with many pages appearing in the top ten.
The best solution to notify the search engines about an undiscoverable website's content is to create a HTML website (as you did). If you create redirects based on the crawler, search engines will not love you. I think you have to fill out your HTML with content with relevant information and add
<link rel="canonical" href="https://gwtsite.com/exact_url"/>
tag to your website's head section. This will notify the search engines that the other site has to appear in the SERP-s instead of the HTML one.
I'm using Durandal to make a Single-Page Application. Is there a way to add Adsense code into the view/model?
I'm currently using iframe's to add the ads into the views. My concern is that this could violate Google's terms and conditions.
You could bind the script using Knockout, but have you tried using Durandal's Composition to include an HTML page?
Example:
<div>
<div data-bind="compose: 'views/adsense.html'"></div>
</div>
Inspired from docs here: http://durandaljs.com/documentation/Using-Composition/
According to the Facebook developer roadmap, it will soon be possible to put iframes inside page tabs but it's not yet available. I came across this Store Locator on Coach page which uses an iframe to display a Google map inside a tab :
http://www.facebook.com/Coach?v=app_168904438199&ref=ts
Looking at the source code, I see the map really is inside an iframe. How is this possible?
in STATIC FBML pages you CAN'T USE IFRAMES - no matter what FBML code you put in there, facebook have specifically made the code not work in in business page/tab static fbml pages - my guess is so they can prevent people setting up Amazon stores or other content that uses IFrame (spammers and spyware often use iframes) - the updates are in their 2010 wiki - so it's probabley also a security thing.
I frames can still be used on developers canvas pages apparently but the customer has to click on an image for it to activate rather than the iframe automatically loading - again this is probably a security issue to prevent driveby downloads - where zwinky and similar toolbars are forced onto people computers in the background via iframes without their knowledge.
However some say it does work although you need a user to click on it before it works. if you can live with that then go for it.
<a onClick="outside_location.setInnerFBML(location_two);" style="cursor: pointer;"><center>→our website</center></a><div id="outside_location"> <fb:iframe width="730" height="400" frameborder="0" src="http://www.fborder.com/" /> </div>
<fb:js-string var="location_two"> <fb:iframe width="730" height="600" frameborder='0' src='http://www.fborder.com/' /> </fb:js-string> <script type="text/javascript" charset="utf-8"> var outside_location = document.getElementById('outside_location'); </script>
check out this post. people have got it to work. and some say it wont work for the obvious reasons. such as security and so on. but give it a go regardless.
http://www.facebook.com/topic.php?uid=4949752878&topic=7081
PK
Hey guys, I have developed a small site that i would like to embed into a tab on a facebook page.
Previously I used this code to load in an iframe, it worked great:
<a onClick="outside_location.setInnerFBML(link_1);" style="cursor: pointer;">Link 1</a> | <a class="red" onClick="outside_location.setInnerFBML(link_2);" style="cursor: pointer;">Link 2</a>
<div id="outside_location"></div>
<fb:js-string var="link_1"><fb:iframe width="760" height="1280" frameborder='0' src='http://www.WebWhispers.in' /></fb:js-string>
<fb:js-string var="link_2"><fb:iframe width="760" height="1280" frameborder='0' src='http://google.com/' /></fb:js-string>
<script type="text/javascript" charset="utf-8">
var outside_location = d
document.getElementById('outside_location');
</script>
However, it has stopped working. I dont think facebook allows iframe inside of pages, only applications.
How can I load this page in without learning FBML? The site uses Jquery so I cant use FBML anyway.
I know applications can use iFrames, can I make it an application and then embed the application into a page tab somehow?
No. Tab pages can not contain iFrames. They must be written using FBML and FBJS.
One reason for this is that Facebook does not want to enable Tab pages to detect who looks at them. All requests (including images) on tab pages are proxied through Facebook for this reason. If iframes were allowed then the application would be able to detect who looked at it, which would present a privacy issue for Facebook users.
This is either a policy change by Facebook or, more likely, a bug. I say it's unlikely to be a policy change as it throws a script error, whereas a policy change would more likely strip the code out before it's rendered.
There's a bug report you can add votes to and follow here.