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Latest freelance programmers: Jeffrey Solochek U have been using computers since the mid seventies. This includes programming, repair, troubleshooting, web design. Currently doing freelance assignments along with creating my own applications... New freelancer Work on projects	Latest freelance projects: datarec Rebuild of joomla template -> move to new template the content of the site New project request Work on projects

Latest programming resources: Php Ajax Related Useful codes, tips and article This website contains useful code, tips and aritcle related to php and ajax programming. Add a new programming resource	Latest forum topics: Memory leaks Hi! Created application is working toooo slow, looks like there are a lot of memory leaks, because the app does not use huge resources, and have no many variables. So, please, can you advice some g... Post a new forum topic

Programming

JSF, Icefaces and custom components experiences

I got the task to evaluate the new web-frameworks in the company I work for. There were many candicates that might enhance the web user interface and move away from the old struts framework. If you want to know some of my experiences, just read on..

Comments (5)

Icefaces custom tag with facelets

I've been struggling with creating my own icefaces tag that I could use everywhere it's needed. There are many tutorials on the internet, BUT.. I couldn't get it work anyway.

When I looked at the sourcecode on the webpage, the tag <ticker:ticker /> was there directly in the HTML sourcecode. This is wrong, because I expected the rendered ouput there.

One whole week I tried to solve this problem trying almost everything. But then, finally, I found it.

So, what was the problem? When you are using Facelets with your JSF/Icefaces, the TLD (tag library descriptor) files are for nothing. Even if I tried to place them everywhere. You have to create the equivalent of the TLD file for the Facelets - the XML file describing the tag structure. In this case it's ticker.taglib.xml

The tag descriptor for the facelets

There you specify the component's class - Ticker, and it's renderer - TickerRenderer. Now, you don't need the TickerTag as suggested when using JSP in many tutorials around the internet.

Also don't forget to tell the JSF to recognize your taglib and place this XML snippet into web.xml (just the first reference to xml, the second is when you want to use also another taglib - eg. the tomahawk components)
web.xml facelets libraries

Put the reference to your tag descriptor into web.xml

    <context-param>
        <param-name>facelets.LIBRARIES</param-name>
        <param-value>
            /WEB-INF/ticker.taglib.xml;/WEB-INF/tomahawk.taglib.xml
        </param-value>
    </context-param>

JSF source with a custom tag

Rendered output

I wonder why this 'trick' hasn't been described yet in some tutorial. So, I hope you will find this remark useful and it will help you when creating your own JSF components.

Comments (3)

Firefox extensions - useful XUL resources

I've been reading something about firefox extensions programming. There are many tutorials on the web showing just the basics - how to create the .xpi file, and describe contents of this archive. None of these tutorials showed something more about the XUL programming and theory behind it.

Check out these cool XUL presentations I found:

http://www.xmlaustin.org/wk/385/4/Eitan_Suez_XUL.pdf

http://media.wiley.com/product_data/excerpt/04/04714158/0471415804.pdf

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Practical usage of AJAX on this website

I found a great CSS dropdown menu on a website http://www.cssplay.co.uk/menus/drop_variation.html

It allows you to include the dropdown menu as one you can see on the top of this website. One great advantage is that it's in a plain HTML with the usage of CSS styling and therefore no javascript coding is required.

Ok, so I made a module that generates the set of HTML links from the Joomla CMS which are then transformed into this nice menu.
Every page of my website usually contains less than 100 links (internal+external) because I want the pages to be the search engine friendly. But using this feature the number of links on every webpage increased to 200 or so.

Comments (1)

Google web toolkit (GWT) useful links

Currently I am evaluating the Google Web Toolkit technology (GWT) for our project and I'm trying to compare it to other approaches like the ICEfaces technology from the Icesoft company.

If you are about to start with the google web toolkit (gwt), I can recommend you the following presentation from Intellij:

http://www.jetbrains.com/idea/training/demos/GWT.html

It features the Intellij IDEA's support for GWT. I have to say here that working with GWT with IDEA is very easy and intuitive. IDEA's got lots of helpers, code generators, and error reporting. I was nicely surprised that IDEA hilighted the non-existing CSS style used with the GWT ! Creating the remote servlets is also a piece of cake! It registers your servlet automatically in web.xml and does other neat stuff.

UPDATE: Great presentation from the Prodyna GmbH:
http://jax.prodyna.de/jaxdocs/jaxgwt.ppt

UPDATE: GWT presentation video from Bruce Johnson:
http://www.infoq.com/presentations/gwt

To learn some theory - have a look here:
http://www.maximilien.org/presentations/2006/AJAX_and_GWT_Public_07052006.pdf

Read the whitepaper form the IBM:
ftp://ftp.software.ibm.com/software/dw/wes/hipods/Advanced_AJAX_with_GWT_wp16Feb.pdf

And a great presentation from javapassion.com:
http://www.javapassion.com/ajax/GWT.pdf

and it's version with the speaker noted there.
http://www.javapassion.com/ajax/GWT_speakernoted.pdf

I found the development with GWT quite easy, it's quite similar to the swing development with it's actionlisteners etc.. My task now is to create the form which would have it's fields expanded regarding to the role of the user that logged in. With icefaces it was the matter of an hour, GWT learning curve seems to be quite longer, but maybe it's because I knew JSF before. Anyway.. it's worth to have a look at these technologies, because they allow you to combine the AJAX and Java approach, without any painful javascript coding. If you'd have some experiences with the GWT, or other web technologies, feel free to comment ! Thank you

Comments (2)

Amazing Flex 3d demo

Check out this amazing 3D Flex demo:

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ICEfaces JSF components presentation

Here is a flash presentation of the components bundled with the ICEfaces framework from the icesoft.com. It features functionality like text autocompletion, calendars, menus, forms partial submit, trees, drag&drop and many various effects.

Click the image to see the icefaces components flash presentation

icefaces jsf components presentation

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Swing text antialiasing

Want to antialias all the text on your Swing application without touching your code? No problem, just add the following definition to the command line when you invoke your application: java -Dswing.aatext=true MyStartClass

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Java Tips

Here are some of my tips and notes, that could be useful for you Comments (1)
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Programming in J2EE

I'm focusing on Java2 Enterprise Edition (J2EE), and have the following experiences Be first to comment this article
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Web hosting - Rioserver Web Hosting provide ultra-reliable. We offer a range of packages which we believe are better than any other web host simply a cost-by-cost basis.

Website Design - The people at Hosterio are experts at Website design, Ecommerce and Hosting services. You can get complete website for as low as $249 only.

Download the NEW* JoomlaWatch 1.2.9 official from 20.04.2009 available for Joomla 1.5 and Joomla 1.0

Stats of codegravity.com

I've tried development / experimental version of JoomlaWatch (1.2.8b_XY) and:

	It worked without any problems, I've enjoyed the new features and translations
	It was not as smooth as I expected, but it worked
	I was having difficulties, but I've solved them
	It didn't work at all, I switched back to stable 1.2.7
	It didn't work at all, I gave up

Registration required
I know that people don't like registering on websites, but I had to do it. From this moment you have to register first, before you download any file. This is better, because this way I can give you quick info about new version of downloadable files (eg. MathGuard) or some necessary security fixes. Thanks for understanding. (26.08.2007)

Books about investing and finance
I'd like to recommend you to read a book by Robert T. Kiyosaki - "Rich Dad, Poor Dad". However many people say it's quite a controversial book, it gave me a good motivation to improve my financial intelligence. (23.08.2007)

Fighting with the spam
All of the forms were protected with my own PHP antispam class - MathGuard, including the forms in the joomla modules I use. (02.05.2007)

Forum
Converted posts from the old punbb forum to the new joomlaboard (25.02.2007)

Improvement
Fixed some issues with the freelance registration, added a possibility to add a new programming resource, reorganized the structure of the programming resources. (24.02.2007)

New content management system
Codegravity.com is now running on joomla cms :) Added features like comments, forum etc. I hope you'll like it. Today I fixed the problem with the comment module which was not showing the correct images. There is also a new URL structure. For the old urls there is a 301 (Moved permanently) http redirect. (10.02.2007)

Moved to another hosting
Codegravity.com has been moved to another web hosting - CustomHosting.sk, from the previous pipni.cz, mainly because of the mod_rewrite problems and slow loading of the website. Sorry for some problems that lasted for about an hour. (19.01.2007)

Bookmark feed
The new feed from the del.icio.us has been added to the homepage codegravity.com. You 'll always have the latest information about the sites I like and you should visit as well! (21.11.2006)

News improved
Today I improved the news feeds. They are sorted into categories and I also added some other feeds that may be interested for you. (31.03.2006)

The Antispam verification
My email form was hijacked by the spam bots and I was recieving a lots of junk into my mailbox everyday. So, I decided to put a simple verification in the end of the form. You have to answer the result of addition of two numbers. Thank you for your understanding. (07.03.2006)

Java SE 6 Beta Mustang is out !
This beta release is a major milestone in the development of Mustang. It provides a complete stable snapshot of the final release functionality. http://mustang.dev.java.net (20.02.2006)

Google analytics, apply online
Apply online to google-analytics.com. They offer the new way of analysis of your website visitors. It is very promising, and when you will recieve the invitation code, you can send me one :) Thank you :) (13.02.2006)

Money Manager 2 - software for mobile accounting

FaceRSS - simple JavaServer Facer (JSF) component
I registered my new project - FaceRSS on freshmeat.net, here is the description: FaceRSS is a simple JavaServer Faces (JSF) component that allows you to display news from a specified URL source in one configurable JSP tag. This allows you to place news feeds on a Web site in a very simple way. It uses rsslib4j and therefore supports RSS version 0.9x, 1.0, and 2.0 with Dublin Core and Syndication namespaces. (06.01.2006)

My new blog :)
Check out my new [jroller.com/page/matto3c] blog on jroller.com website. Here is the RSS feed [http://jroller.com/rss/matto3c] if you'd like to add it into your news reader. (14.12.2005)

Optimizations
Thanks to the SEO company SeoVisions, for the basic optimization of this website. (11.12.2005)

ERM-II and Slovakia
SLOVAKIA, my home country, is now one step closer to adopting the common European currency - EURO. At midnight between November 25 and November 26, the country joined the Exchange Rate Mechanism 2 (ERM-II) (30.11.2005)

www.jground.com
I established a new website - http://www.jground.com, it's all based on JSF and it should be all about Java and all other related things. Enjoy! (25.11.2005)

Swing text antialiasing

Java webhosting
I'm trying a new http://www.move.cz java webhosting on www.move.cz, but it seems they don't respond to my questions about JSF ;( (16.11.2005)

Migration from Weblogic to JBoss
Currently I am working on a task: Migration of one J2EE application from Weblogic to JBoss application server. So, if you have any suggestions or resources, I would be glad if you'll send me some. Thanks (15.11.2005)

Increased Java performance
Java increased its performance on desktop by 58% : [http://www.javalobby.org/java/forums/t54006.html] Java Performance
Improvement (15.11.2005)

Exadel Studio Pro
At this time I'm playing with JSF (Java Server Faces). I want to recommend you a great IDE - Exadel JSF Studio Pro. It costs about $99, and there is 15 days trial available. You can also try MyEclipse which has also like Exadel - WYSIWYG editor for editing JSP, JSF pages. It can save you a lot of time. For more info, visit www.exadel.com (27.09.2005)

Programming directory
added a new programming resources directory, where you can submit your own programming website (14.09.2005)

Programming forum
Now the Programming forum is included in website design. I put there some topics from previous version of this forum. (19.08.2005)

Ubytovanie, podnajom Poprad
Ponuka na podnajom, ubytovanie: Zrekonštruované podkrovie - rodinny dom Poprad-Matejovce - 2 izby + pracovna + kúpelna s kuchynou, strešné a plastové okná, samostatné plynové kúrenie, drevené plávajúce podlahy, garáž, velká záhrada a samostatný vchod. . . Cena: dohodou
Kontakt: 0908 190 372 (18.02.2008)

Stavebny pozemok
Predám stavebný pozemok v prijemnom prostredí kúpelov Vyšné Ružbachy v blízkosti lyžiarskych vlekov. Inžinierske siete v blízkosti. Vhodný na relax ale aj podnikanie. 1767+27m2. 0908 190 372