Comments on: BTimer Class: A Javascript Timer Class

By: Bryce Boe

Bryce Boe — Wed, 01 Jul 2009 05:24:36 +0000

Bob- My apologies for the late reply. I’m sure by now you’ve figured everything out about this code and perhaps made improvements or decided it’s not very well written. It always fun to look at you own code from previous years. First I need to say I don’t know javascript terribly well, definitely much less than I knew when I wrote this.

The self.ms in the setTimeout call is unnecessary and must have been an artifact of a previous version of this code. Regarding having multiple concurrent timers on a page, I seem to remember trying that and having a few problems.

The other functions are global functions because at the time I wrote pretty much everything as global functions unless they clearly should be in a class such as the timer code. Also I wanted to simply be able to call them from onclick events, but I now acknowledge that they needn’t be global to do that.

Thanks for the comments.

By: Bob Gibson

Bob Gibson — Mon, 22 Jun 2009 02:45:26 +0000

Why do you have the following as global functions?
————————————————–
function BTimerMyStart0()
function BTimerMyUpdate0()
function BTimerMyPause0()
function BTimerOther0( string )
————————————————–
This makes it that much harder to have multiple timers on a page.

By: Bob Gibson

Bob Gibson — Mon, 22 Jun 2009 02:24:36 +0000

Interesting read. I’m still trying to digest it.

Why does the setTimeout() call in your _run : function pass self.ms? It appears to be unused.

I’m also trying to figure out to have multiple concurrent timers on one page, and don’t know (yet) if this will resolve the issues that I have been having.

Thanks for sharing.
Bob

By: Bryce Boe

Bryce Boe — Mon, 09 Jun 2008 18:24:34 +0000

You can use onclick events to update the interval by 20 seconds for each click, however it wont update the currently running timer. To get around that I’d suggest using a 1 second timer, with a pseudo update function which keeps track of the number of times it’s been called. When the count reaches a certain value, the desired interval, call the real function. Then to increase the interval by 20 increase the value that the pseudo update function uses.

Hopefully that helps.

By: Sourav Das

Sourav Das — Mon, 09 Jun 2008 11:12:17 +0000

how to add 20 seconds with timer by every click in javascript

By: Bryce Boe

Bryce Boe — Thu, 12 Apr 2007 16:55:12 +0000

This does look pretty clean unfortunately ASP.NET is not a choice for me. Also in viewing the source created by the timer page this appears:

Control._defaultUrl=’http://ajaxwidgets.com/AllControlsSamples/Timer.aspx’;
Control.registerControl(new WebControl.LinkButton(‘ctl00_showCode’)).observe(‘click’);Control.registerControl(new WebControl.Button(‘ctl00_ContentPlaceHolder1_Button1′)).observe(‘click’);Control.registerControl(new WebControl.Label(‘ctl00_ContentPlaceHolder1_Label2′));Control.registerControl(new WebControl.Label(‘ctl00_ContentPlaceHolder1_Label1′));Control.registerControl(new Control.Timer(‘ctl00_ContentPlaceHolder1_Timer1′, {enabled:true, milliseconds:1000}));

Though I haven’t actually taken the time to figure out how exactly the Gaia stuff works it seems the only flaw between our two timers is that Microsoft unfortunately doesn’t fully support Javascript; I suppose that makes BTimer inferior to GAIA although BTimer doesn’t require server side scripting, which I’m guessing GAIA does.

By: Thomas Hansen

Thomas Hansen — Thu, 12 Apr 2007 13:21:52 +0000

If you’re using ASP.NET you would rather want to check out:
http://ajaxwidgets.com/AllControlsSamples/Timer.aspx