Rick,
Here's a simple example:
import net.liftweb._
import util._
import http._
import js._
import JsCmds._
import JE._
import scala.xml.NodeSeq
class Evently extends CometActor {
// handle an incoming JSON event
override def handleJson(in: Any): JsCmd = in match {
case JsonCmd("pressed", _, key, _) => SetHtml("info", <b>You pressed
{key}</b>)
case _ => Noop
}
def render =
<div>
<span id="info"/> <!-- A place to put stuff -->
{
Script(jsonInCode) // include the JSON callback
}
<input type="text" onkeypress={jsonCall("pressed",
JsRaw("event.which")).toJsCmd}/>
</div>
}
So, the handleJson message gets called on the server whenever a key is
pressed on the client (this example works in non-IE browsers, but that's
just 'cause I'm using event.which rather than event.keyCode).
Hope this helps.
Thanks,
David
On Wed, Feb 24, 2010 at 8:23 AM, Rick R <[email protected]> wrote:
> I have a textarea in which I process onKeyUp and onKeyDown commands.
> The handlers for such things are custom javascript.
> I would like to invoke functions in a Comet LiftActor /
> ListenerManager via these custom javascript functions. Is there
> documentation on the recommended way to do so?
>
> It looks like I will have to define the functions within a render call
> and use the SHtml.ajaxCall function, since the destination url is
> randomized. I am just wondering what would be the idiomatic way to do
> this.
>
> This is for a chat style app which processes/distributes data by the
> keystroke rather than by a line/post command.
>
>
> I'm open to any ideas / alternate suggestions.
>
> Thanks,
> Rick
>
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