Nifty Piano Demo - Flapjax

Message from discussion Nifty Piano Demo

Arjun Guha

More options May 18, 6:22 pm

From: Arjun Guha <arjun.g...@gmail.com>

Date: Mon, 18 May 2009 18:22:34 -0400

Local: Mon, May 18 2009 6:22 pm

Subject: Re: [Flapjax: 418] Nifty Piano Demo

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Yeah, extractValueE/B doesn't play nicely with programmatic updates of
the textbox. What you could do--this is an awful hack--is set the
value and then call .sendBehavior(value) to update the behavior that
you're reading. (Let me know if this is unclear, I can give an
example).

This is a quirk/bug in Flapjax. extractValueB is a thin function that
monitors that uses event handlers like "keypress" to monitor changes
to the input. No event fires when you programmatically update a text
box, so extractValueB misses it.

Have you considered using the extractEventE(textbox, "keypress")? The
event values of a keypress event (and anything from extractEventE) are
DOM events:

http://www.w3schools.com/jsref/jsref_onkeypress.asp

So, you could use the .keyCode field.

Arjun

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