Having
def ajaxText(value: String, jsFunc: Call, func: String => JsCmd)
jsFunc parameter is a Call which is defined as:
case class Call(function: String, params: JsExp*) extends JsExp
So by this you represent a javascript function invocations.
So assuming somewhere you have a javascript function like:
function myFunc(myParam, callback) {
// do some logic
callback()
}
in the snippet we have something like:
ajaxText(task.dueOn.toString,
Call("myFunc", Str("some_param_value"))
v => { task.dueOn(v.toLong).save; reDrawTasks();})
As you can see we called Call("myFunc", Str
("some_param_value")) .. .we provided the JS function name and one
parameter. Lift will add the second parameter which is the callback
function. This callback function represents the actual ajax call and
since it is a callback you can invoke it whenever you want inside
'myFunc' javascript function. In other words you can defer the actual
ajax call as you see fit.
Now myFunc function declaration can be:
1. In your own .js file
2. Written in the <script> tag inside your html
3. Generate using Lifts' JS absctrations using JsCmds.Function()
object such as:
JsCmds.Function("MyFunc", List("myParam", "callback"),
a_JsCmd_expression_which_is_the_function_body)
The main point in all this is that you can defer the actual ajax call.
You know better if this fits your case.
Br's,
Marius
On Aug 18, 10:21 pm, g-man <[email protected]> wrote:
> No, this is the old way ...I am unsure how to invoke the ajax method
> -- could you enlighten me?
>
> On Aug 17, 12:26 pm, "marius d." <[email protected]> wrote:
>
> > I don't see in your code the use of the overloaded ajaxText that I
> > posted. Have you tried it?
>
> > Marius
>
> > On Aug 17, 10:20 pm, g-man <[email protected]> wrote:
>
> > > OK, thanks for checking back...
>
> > > Snippet:
> > > swappable(<span class='dueon'>{task.dueOn.toString}</span>,
> > > <span class='chgDueon'>{ajaxText(task.dueOn.toString,
> > > v => { task.dueOn(v.toLong).save; reDrawTasks();
> > > }) % ("size" -> "10")}</span>)
>
> > > JS:
> > > $chgDueon // jQuery selection for text field
> > > .datepicker({dateFormat:'m-d-yy', minDate: +1})
> > > .blur(function(){$chgDueon.val(parseDate($chgDueon.val()));});
> > > // works well to pick a new date and change it to millis for save
>
> > > Emitted XHTML:
> > > <span>
> > > <span class="dueon" id="F111290299287IBE"
> > > onclick="jQuery('#'+'F111290299287IBE').hide();
> > > jQuery('#'+'F1112902992880KN').show().each(function(i) {
> > > var t = this; setTimeout(function() { t.focus(); },
> > > 200);});return false;;">
> > > 1248493271843</span>
> > > <span style="display: none" id="F1112902992880KN"
> > > onblur="jQuery('#'+'F111290299287IBE').show();
> > > jQuery('#'+'F1112902992880KN').hide();">
> > > <input onblur="lift_ajaxHandler('F111290299286DL1=' +
> > > encodeURIComponent(this.value), null, null)"
> > > type="text" value="1248493271843"
> > > onkeypress="lift_blurIfReturn(event)" size="10" />
> > > </span>
> > > </span>
>
> > > So, all the parts work well together, but Lift's ajax just takes off
> > > too quickly, and cannot read the new value.
>
> > > On Aug 16, 11:02 pm, "marius d." <[email protected]> wrote:
>
> > > > You can probably use this definition of ajaxText:
>
> > > > def ajaxText(value: String, jsFunc: Call, func: String => JsCmd)
>
> > > > See the jsFunc parameter. Essentially you are specifying your function
> > > > call that may have one parameter. To your parameter list List we'll
> > > > add a new parameter which is the ajax invocation function. In other
> > > > words your code gets that function that does the ajax call meaning
> > > > that you have the control over when the ajax call is made.
>
> > > > Br's,
> > > > Marius
>
> > > > On Aug 17, 8:55 am, "marius d." <[email protected]> wrote:
>
> > > > > Would you please post a code snippet with what you're doing? (a
> > > > > minimalistic example)
>
> > > > > Br's,
> > > > > Marius
>
> > > > > On Aug 17, 7:41 am, g-man <[email protected]> wrote:
>
> > > > > > I am moving nicely with my 'save all dates as millis and let the
> > > > > > client localize for display' project, learning while enhancing the
> > > > > > ToDo sample app.
>
> > > > > > I have added a 'dueOn' field, and that is displayed as swappable
> > > > > > ajaxText, similar to the other fields in the tutorial.
>
> > > > > > I have enabled datepicker for the ajaxText field via jQuery, and
> > > > > > have
> > > > > > a parsing function attached an event listener, so when datepicker
> > > > > > finishes, the date is converted to millis, ready for Lift to send
> > > > > > back
> > > > > > to the server and save.
>
> > > > > > So far, all good.
>
> > > > > > The problem is that Lift's ajax starts ('onblur') before it has a
> > > > > > chance to see the new date value, so the new value is never saved.
>
> > > > > > What I need is a way to tell Lift to wait until after my parser has
> > > > > > had a chance to write the changed value.
>
> > > > > > I like the ajax style, so I don't want to make a 'submit' form, and
> > > > > > 'onchange' won't do it either, because the value is actually changed
> > > > > > twice (once to a formatted date, once to millis).
>
> > > > > > What I need is some way to say, 'OK to start ajax now'!
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