// there's the original piece of code where i'm working...
this.ajax_observer = this.refresh_options.bindAsEventListener(this);
var current_time = new Date();
timestamp = current_time.getTime();
__ajax_options.onComplete = this.ajax_observer;
__ajax_options.timestamp = timestamp;
this.espected_timestamp=timestamp;
this.ajax_request = new Ajax.Request(this.ajax_url,
__ajax_options);
there you see i done the binding of the handler function to the
object, and the handler function and the request are part of "this"...
BUT, i need to compare when the handler function is fired, if the
timestamp asociated by the request who's fired te handler function...
in this way... when i compare
this.ajax_request.options.timestamp==this.espected_timestamp will
return always true, because old request will be overwritten by the new
requests pulled in the this.ajax_request object... in this way i would
not compare the especific timestamp asociated with the especific
request, because the ajax_request object is "disappeared" when i
overwrite this.ajax_request... disapear to the sight but still fires
the handler function ...
i'm thinking that the only way is to return the timestamp from the
server side ...
On 22 nov, 15:04, "Richard Quadling" <[EMAIL PROTECTED]> wrote:
> On 22/11/2007, Richard Quadling <[EMAIL PROTECTED]> wrote:
>
>
>
> > I think I understand your request.
>
> > The AJAX call back (onSuccess, onComplete) also need to be bound to this.
>
> > BUT!!!!
>
> > Make sure you have the Ajax request as a property of this ...
>
> > Here is an edited example of a class which has a some methods to
> > process things after an onComplete and also used within the class
> > itself ...
>
> > var classs_Alerter = Class.create({
> > initialize : function() {
> > this.o_AJAX = new Ajax.PeriodicalUpdater('dot',
> > location.href, {
> > frequency : 30,
> > delay : 1,
>
> > // Note binding of "this" - this relates to main
> > class, not
> > Ajax.PeriodicalUpdater
> > onException : (function(o_Transport, o_JSON) {
> > this.commonUpdate(this);
> > }).bind(this),
>
> > onFailure : (function(o_Transport, o_JSON) {
> > updateAjaxReport(o_Transport.statusText,
> > 'MAction_Failure_TH');
> > this.commonUpdate(this);
> > }).bind(this),
>
> > onSuccess : (function(o_Transport, o_JSON) {
> > if (!!o_JSON) {
> > $('Jobs').update(o_JSON.Jobs);
> > $('Chase').update(o_JSON.Chase);
>
> > if ('0 jobs' != o_JSON.Jobs) {
> > this.Play1.bind(this).delay(1); }
> > if ('0 jobs' != o_JSON.Chase) {
> > this.Play2.bind(this).delay(5); }
> > } else {
> > updateAjaxReport('<span
> > class="MErrors_SPAN">There us a problem
> > with the server.<br />Please tell Richard.</span>',
> > 'MAction_Failure_TH');
> > }
>
> > this.commonUpdate(this);
> > }).bind(this)
> > });
>
> > this.commonUpdate(this);
> > },
>
> > Play1 : function() {
> > soundManager.play('mySound1','/global/tructyre.mp3'); },
> > Play2 : function() {
> > soundManager.play('mySound2','/global/etarequireschasing.mp3'); },
> > commonUpdate : function(o_Alerter) {
> > o_Alerter.o_Date = new Date();
> > o_Alerter.o_NewDate = new Date(o_Alerter.o_Date.valueOf() +
> > (1000 *
> > o_Alerter.o_AJAX.decay * o_Alerter.o_AJAX.frequency));
> > $('Last').update(o_Alerter.o_Date.toLocaleString ());
> > $('Next').update(o_Alerter.o_NewDate.toLocaleString ());
> > }
> > });
>
> > document.observe('dom:loaded', function(){o_Alterer = new
> > classs_Alerter();});
>
> > So, within the Ajax handlers you use this.o_AJAX to access the
> > PeriodicalUpdater object.
>
> > On 22/11/2007, Rodrigo Carvajal <[EMAIL PROTECTED]> wrote:
>
> > > maybe it doesn't understands so well; the issue is access de
> > > ajax.request instance who fired the handler function, how this can be
> > > done?...
>
> > > On 21 nov, 20:37, Rodrigo Carvajal <[EMAIL PROTECTED]>
> > > wrote:
> > > > i'm sending multiple ajax.request instances when i search for
> > > > something when the 'keypress' event is fired; this is not a problem
> > > > unless sometimes some ajax.request's don't came back in the same order
> > > > that they was sended... in some cases earlier requests came back after
> > > > late requests and that can be anoying to the user... i was thinking in
> > > > atach to the request a timestamp and in the handler function wait for
> > > > the last timestamp in the last request and dismiss the others; i don't
> > > > know if there exists a more elegant way to do this...i was thinking to
> > > > send the timestamp in the request and send it back from the server and
> > > > check it that way but i would like to do in the client side only...
>
> > > > example:
>
> > > > $('textbox').observe('keypress', this.send_request.bind(this));
>
> > > > ...
>
> > > > this.send_request = function() {
>
> > > > options.onComplete = this.ajax_handler; // Handler function for the
> > > > request...
>
> > > > var current_date = new Date();
>
> > > > timestamp = current_date.getTime();
>
> > > > options.timestamp=timestamp; // Timestamp in the Ajax options for
> > > > identify it in the handler...
> > > > this.expected_timestamp=timestamp;
>
> > > > this.ajax_object = new Ajax.Request('sql.php', options); // Generate
> > > > Request...
>
> > > > }
>
> > > > this.ajax_handler = function(response) {
>
> > > > // Do anything i have to do here...
> > > > // There i need to know the timestamp asociated by the ajax object
> > > > that triggered this
> > > > // function in order to use it only if is the last request and dismiss
> > > > others
> > > > // ....
>
> > > > }
>
> > > > thanks in advance for the help... ( and excuse my poor english ...)
>
> > --
> > -----
> > Richard Quadling
> > Zend Certified Engineer :http://zend.com/zce.php?c=ZEND002498&r=213474731
> > "Standing on the shoulders of some very clever giants!"
>
> Eek. A little complicated.
>
> Maybe this is a better example ...
>
> var a_class = Class.create({
> initialize : function() {
>
> this.o_AJAX = new Ajax.PeriodicalUpdater('dot', location.href, {
>
> onSuccess : (function(o_Transport, o_JSON) {
> this.commonUpdate();
> }).bind(this), // BIND calls.
>
> });
>
> this.commonUpdate();
> },
>
> commonUpdate : function() {
> // this.xxxx
> }
>
> });
>
> --
> -----
> Richard Quadling
> Zend Certified Engineer :http://zend.com/zce.php?c=ZEND002498&r=213474731
> "Standing on the shoulders of some very clever giants!"
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups "Ruby
on Rails: Spinoffs" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/rubyonrails-spinoffs?hl=en
-~----------~----~----~----~------~----~------~--~---
