?
Solved

Extension Development: Frozen Firefox scrollbar and dis-functional hot-keys

Posted on 2011-02-20
1
Medium Priority
?
498 Views
Last Modified: 2013-12-07
Hello all,

I am writing a Firefox extension which creates a Java applet in the page.

function addApplet(aDocument,url,classfile,archive) {
if (navigator.javaEnabled()) {
var anApplet,body;
body = aDocument.getElementsByTagName('body')[0];
anApplet = aDocument.createElement('applet');
anApplet.setAttribute('CODEBASE',url);
anApplet.setAttribute('code',classfile);
anApplet.setAttribute('archive',archive);
anApplet.setAttribute('name',"Applet");
anApplet.setAttribute('width',"0");
anApplet.setAttribute('height',"0");
body.appendChild(anApplet);
}
}

The JAR file loaded from the applet is 500KB in size. I noticed that sometimes the extension causes Firefox's vertical scrollbar to freeze and the hot-keys to stop working. The scroll-bar and hot-keys work fine if I prevent the extension to append the applet to the page.

Another weird behavior is -- on the frozen page if I click inside any text/search box or even address bar the scroller and the hotkeys begin to work again. The same thing happens if I switch tabs or minimize the browser window.

I am using Firefox 3.6.12 on WindowsXP.

Please help me if you have an idea regarding this or if I should provide more information.

Thanks
0
Comment
Question by:imreaper
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 

Accepted Solution

by:
imreaper earned 0 total points
ID: 34940532
I think I have found a way around to this problem:

Solution:
This behavior is the default since JDK 1.3. However you might need to prevent the applet from getting focus on startup, for example, if your applet is invisible and does not require focus at all. In this case, you can set to false the special parameter initial_focus in the HTML tag, as follows:

<applet code="MyApplet" width=50 height=50>
*<param name=initial_focus value="false">*</applet>

Open in new window

0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I had to do a bit of research to find the answer to this question so I thought I'd share my results.  Due to our outdated mainframe systems, we need to downgrade IE9 to IE8 in order to stay compatible.  We also needed to downgrade Java.  In order to…
Do you come here a lot? Are you lazy like me and don't want to go through the "trouble" of having to click your Dock's Safari icon and then having to click your Experts Exchange Favorites bookmark to get here? Well then this article is for you.
This Micro Tutorial will demonstrate how nuggets on the Web are formatted by using Chrome Developer Tools. These tools would not only view the site's CSS but it can also modify it and save the CSS to use on your own site.
Shows how to create a shortcut to site-search Experts Exchange using Google in the Chrome browser. This eliminates the need to type out site:experts-exchange.com whenever you want to search the site. Launch the Search Engine Menu: In chrome, via you…
Suggested Courses
Course of the Month14 days, 12 hours left to enroll

771 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question