JSF 2 ： Event handling, JavaScript, and Ajax

Sky-Tiger

UI Latency
Posted by driscoll on June 08, 2009 at 10:10 AM | Permalink | Comments (2)

One of the talks I attended at JavaOne was Ben Galbraith speaking on UI design. While not a blockbuster talk, there was a lot of good information in there.

Perhaps the most surprising was the topic of UI latency. I'd always heard that 200ms was about the "twitch-time" number, where a UI would start to feel significantly sluggish - this was the number that used to be bandied about on gaming sites 10 years ago.

It had never occured to me to test this thesis though - and that's the difference between someone like me and someone like Ben.

Ben put up a series of buttons on a web page with programmed latencies in increments of 50ms. His findings? 100ms is noticeable, and 200ms is the line for "sluggish". So, while 200ms remains the cutoff for "bad", 100ms would seem to be the cutoff for "good". Oh great, my target time just got cut in half.

Ajaxian has a writeup of this portion of the talk, check it out.

And don't forget that you can easily test this yourself, with a little bit of onclick and setTimeout.

Sky-Tiger

Slides to my JSF 2 components and Ajax BOF
Posted by driscoll on June 04, 2009 at 12:15 PM | Permalink | Comments (5)

Last night, Ryan Lubke and I gave a BOF on creating components with JSF 2. If you've been reading my blogs, none of this will be especially new, but I did think that you might appreciate the slides, which I've now uploaded and are available in OpenOffice 3 and PDF versions. The OpenOffice version has the slide notes, which you might find helpful. Still missing is the code that Ryan did last night, demonstrating, among other things, the use of the ajax tag's listener attribute - which is pretty neat. Ryan will probably blog on it shortly.

Another David Geary article on JSF 2
Posted by driscoll on June 02, 2009 at 09:58 PM | Permalink | Comments (0)

David Geary has released the second of his three part series on JSF 2. You can find it here.

He covers templating and composite components, and as usual, does a very readable and thorough job - check it out.

JavaOne Party Planner
Posted by driscoll on May 29, 2009 at 10:48 PM | Permalink | Comments (2)

I'm not sure how I got this job, but apparently I'm supposed to find all the JavaOne parties.

This year was harder, and it seems there will be very few opportunities to cage free drinks from eager PR people. Oh well, I intended to go to a lot of BOFs anyway.

So, here's the skinny on parties, feel free to add any I don't know about in the comments section, below: