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Posted to users@wicket.apache.org by Thomas Götz <to...@richmountain.de> on 2010/04/08 20:43:25 UTC

How to give feedback in long-running operation within AjaxButton.onSubmit()?

Problem:
I have an AjaxButton that triggers a long-running operation when clicked. I want to give feedback (in form of a javascript message) upon partial completion of the operation, therefore I am using a jQuery notifications plugin (http://www.programmingmind.com/contributions).

So, what I do is the following:

final Form form = new Form("form");
add(form);

form.add(new AjaxButton("button) {
    @Override
    protected void onSubmit(AjaxRequestTarget target, Form<?> form) {
        for(Object o : someList) {
            // do somthing
            target.appendJavascript(getJavascript());
        }
        target.addComponent(form);
    }
});


... but obviously, the Javascript messages are only display at the end of the complete operation (after foreach loop has finished). So my question: what should I do to get the messages displayed after each iteration?

   -Tom


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Re: How to give feedback in long-running operation within AjaxButton.onSubmit()?

Posted by Nishant Neeraj <ni...@gmail.com>.
I think you may look into this package
org.apache.wicket.extensions.ajax.markup.html.form.upload where upload
progress-bar is implemented. You may do something like this.

So, probably it sets a resource in session, Java part regularly updates the
string resource. And JS keeps on polling this resource by using the URL to
the resource provided to JS initializer and renders on UI. Anyone can
correct me, if I am wrong.

Just a suggestion. I am naive to Wicket.

- Nishant

On Fri, Apr 9, 2010 at 2:25 AM, Thomas Götz <to...@richmountain.de> wrote:

> I fear not. As far as I understand, getAjaxCallDecorator() decorates the
> javascript with a custom script, which is executed immediately upon hitting
> the button. What I want to achieve is displaying some status messaged during
> the progress of my long-term operation ...
>
>   -Tom
>
>
> On 08.04.2010 at 20:58 Fernando Wermus wrote:
>
> > Does this resolve your problem?
> >
> > @Override
> >
> > protected IAjaxCallDecorator getAjaxCallDecorator() {
> >
> >        return new AjaxCallDecorator() {
> >
> >            private static final long serialVersionUID = 1L;
> >
> > @Override
> >
> > public CharSequence decorateScript(CharSequence script) {
> >
> > return YOUR JAVASCRIPT + script;
> >
> > }
> >
> >        };
> >
> > }
> >
> > On Thu, Apr 8, 2010 at 3:43 PM, Thomas Götz <to...@richmountain.de> wrote:
> >
> >> Problem:
> >> I have an AjaxButton that triggers a long-running operation when
> clicked. I
> >> want to give feedback (in form of a javascript message) upon partial
> >> completion of the operation, therefore I am using a jQuery notifications
> >> plugin (http://www.programmingmind.com/contributions).
> >>
> >> So, what I do is the following:
> >>
> >> final Form form = new Form("form");
> >> add(form);
> >>
> >> form.add(new AjaxButton("button) {
> >>   @Override
> >>   protected void onSubmit(AjaxRequestTarget target, Form<?> form) {
> >>       for(Object o : someList) {
> >>           // do somthing
> >>           target.appendJavascript(getJavascript());
> >>       }
> >>       target.addComponent(form);
> >>   }
> >> });
> >>
> >>
> >> ... but obviously, the Javascript messages are only display at the end
> of
> >> the complete operation (after foreach loop has finished). So my
> question:
> >> what should I do to get the messages displayed after each iteration?
> >>
> >>  -Tom
> >>
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> >> For additional commands, e-mail: users-help@wicket.apache.org
> >>
> >>
> >
> >
> > --
> > Fernando Wermus.
> >
> > www.linkedin.com/in/fernandowermus
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>

Re: How to give feedback in long-running operation within AjaxButton.onSubmit()?

Posted by Thomas Götz <to...@richmountain.de>.
I fear not. As far as I understand, getAjaxCallDecorator() decorates the javascript with a custom script, which is executed immediately upon hitting the button. What I want to achieve is displaying some status messaged during the progress of my long-term operation ...

   -Tom


On 08.04.2010 at 20:58 Fernando Wermus wrote:

> Does this resolve your problem?
> 
> @Override
> 
> protected IAjaxCallDecorator getAjaxCallDecorator() {
> 
>        return new AjaxCallDecorator() {
> 
>            private static final long serialVersionUID = 1L;
> 
> @Override
> 
> public CharSequence decorateScript(CharSequence script) {
> 
> return YOUR JAVASCRIPT + script;
> 
> }
> 
>        };
> 
> }
> 
> On Thu, Apr 8, 2010 at 3:43 PM, Thomas Götz <to...@richmountain.de> wrote:
> 
>> Problem:
>> I have an AjaxButton that triggers a long-running operation when clicked. I
>> want to give feedback (in form of a javascript message) upon partial
>> completion of the operation, therefore I am using a jQuery notifications
>> plugin (http://www.programmingmind.com/contributions).
>> 
>> So, what I do is the following:
>> 
>> final Form form = new Form("form");
>> add(form);
>> 
>> form.add(new AjaxButton("button) {
>>   @Override
>>   protected void onSubmit(AjaxRequestTarget target, Form<?> form) {
>>       for(Object o : someList) {
>>           // do somthing
>>           target.appendJavascript(getJavascript());
>>       }
>>       target.addComponent(form);
>>   }
>> });
>> 
>> 
>> ... but obviously, the Javascript messages are only display at the end of
>> the complete operation (after foreach loop has finished). So my question:
>> what should I do to get the messages displayed after each iteration?
>> 
>>  -Tom
>> 
>> 
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>> 
>> 
> 
> 
> -- 
> Fernando Wermus.
> 
> www.linkedin.com/in/fernandowermus


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Re: How to give feedback in long-running operation within AjaxButton.onSubmit()?

Posted by Fernando Wermus <fe...@gmail.com>.
Does this resolve your problem?

@Override

protected IAjaxCallDecorator getAjaxCallDecorator() {

        return new AjaxCallDecorator() {

            private static final long serialVersionUID = 1L;

@Override

public CharSequence decorateScript(CharSequence script) {

return YOUR JAVASCRIPT + script;

}

        };

}

On Thu, Apr 8, 2010 at 3:43 PM, Thomas Götz <to...@richmountain.de> wrote:

> Problem:
> I have an AjaxButton that triggers a long-running operation when clicked. I
> want to give feedback (in form of a javascript message) upon partial
> completion of the operation, therefore I am using a jQuery notifications
> plugin (http://www.programmingmind.com/contributions).
>
> So, what I do is the following:
>
> final Form form = new Form("form");
> add(form);
>
> form.add(new AjaxButton("button) {
>    @Override
>    protected void onSubmit(AjaxRequestTarget target, Form<?> form) {
>        for(Object o : someList) {
>            // do somthing
>            target.appendJavascript(getJavascript());
>        }
>        target.addComponent(form);
>    }
> });
>
>
> ... but obviously, the Javascript messages are only display at the end of
> the complete operation (after foreach loop has finished). So my question:
> what should I do to get the messages displayed after each iteration?
>
>   -Tom
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>


-- 
Fernando Wermus.

www.linkedin.com/in/fernandowermus

Re: How to give feedback in long-running operation within AjaxButton.onSubmit()?

Posted by Alex Objelean <al...@yahoo.com>.
Oh, I see... I got you wrong initially. Indeed, in this case.. the best
solution is polling and upon subtask completion - output a jgrowl
notification script.

Alex


Thomas Götz wrote:
> 
> Ok, but this is *not* what I want to achieve, beggin' your pardon ;-)
> The first messages should not display when starting the operation, but 
> when a certain sub-task is finished. Say, I iterate over a list in the 
> operation, and after each cycle I'd like to display a jGrowl message ...
> 
>     -Tom
> 
> 
> Am 09.04.2010 09:05, schrieb Alex Objelean:
>> That's all. Now  ajaxIndicator DOM element to appear when ajax call will
>> start and will disappear when it will complete.
> 
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
> 
> 
> 

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Re: How to give feedback in long-running operation within AjaxButton.onSubmit()?

Posted by Thomas Götz <to...@richmountain.de>.
Ok, but this is *not* what I want to achieve, beggin' your pardon ;-)
The first messages should not display when starting the operation, but 
when a certain sub-task is finished. Say, I iterate over a list in the 
operation, and after each cycle I'd like to display a jGrowl message ...

    -Tom


Am 09.04.2010 09:05, schrieb Alex Objelean:
> That's all. Now  ajaxIndicator DOM element to appear when ajax call will
> start and will disappear when it will complete.


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Re: How to give feedback in long-running operation within AjaxButton.onSubmit()?

Posted by Alex Objelean <al...@yahoo.com>.
The IAjaxIndicatorAware interface fits perfectly with your need. All you have
do, is: 
- create a DOM element which looks like jGrowl with 'loading' message and
assign it an id (ex: id="ajaxIndicator")
- your webPage should implement  IAjaxIndicatorAware interface:
public class MyWebPage extends WebPage implements IAjaxIndicatorAware {
  //...
  @Override
   public String getAjaxIndicatorMarkupId() {
     return "ajaxIndicator";
   }
   //...
}

That's all. Now  ajaxIndicator DOM element to appear when ajax call will
start and will disappear when it will complete.

Hope this was helpful.

Alex Objelean


Thomas Götz wrote:
> 
> Thanks for all the hints so far, they are really helpful .... but ;)
> 
> Well, I don't want to have busy indicators on different components, I'm 
> looking for a way to display status messages (like eg with jGrowl) 
> during the long-running process (triggered by AjaxButton). I guess the 
> only way to achieve this is with a solution as stated by Nishant 
> (involving some kind of JS polling) ...
> 
>     -Tom
> 
> 
> Am 09.04.2010 08:48, schrieb Tomasz Dziurko:
>> You should check visural-wicket project
>> (http://code.google.com/p/visural-wicket/) and live demo on
>> http://visural-wicket-examples.appspot.com/app/ . In "submitters"
>> there are some fancy looking "waiting" popup messages which could
>> help.
>>
> 
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
> 
> 
> 

-- 
View this message in context: http://old.nabble.com/How-to-give-feedback-in-long-running-operation-within-AjaxButton.onSubmit%28%29--tp28182827p28188414.html
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Re: How to give feedback in long-running operation within AjaxButton.onSubmit()?

Posted by Thomas Götz <to...@richmountain.de>.
Ok, thanks for the hint, but the operations I make usually only take up 
to ~1min, so I guess this won't be an issue in my case. But you are 
right, one has to assure that the polling will stop upon completion of 
the background task.

    -Tom

On 09.04.2010 at 10:28, Tim L Casey wrote:
>
>
> You have to watch session expiration.  This type of polling, without end,
> will keep sessions alive indefinitely.
>
> I don’t have a cut and paste code, but look at AbstractAjaxTimerBehavior.
>
> tim
>
> -----Original Message-----
> From: Thomas Götz [mailto:tom@richmountain.de]
> Sent: Friday, April 09, 2010 12:44 AM
> To: users@wicket.apache.org
> Subject: Re: How to give feedback in long-running operation within
> AjaxButton.onSubmit()?
>
> Hi Ernesto,
>
> this sounds like a viable solution, I'd be glad if you could provide me
> with some more details (e.g. code samples, if available).
>
>      -Tom
>
>
> Am 09.04.2010 09:39, schrieb Ernesto Reinaldo Barreiro:
>> Hi Tom,
>>
>> What I do, for instance, when exporting files to PDF, Excel, etc, is start
>> the process on a background thread, block the screen so that users can
> only
>> wait or stop the process, and use an AJAX timer to get back to the server
>> every few seconds to monitor the progress and display it as progress-bar.
>> This seems to work fine for me but might not be the most efficient
>> solution... I can give you more details if you want.
>>
>> Best,
>>
>> Ernesto
>>
>> On Fri, Apr 9, 2010 at 8:55 AM, Thomas Götz<to...@richmountain.de>   wrote:
>>
>>> Thanks for all the hints so far, they are really helpful .... but ;)
>>>
>>> Well, I don't want to have busy indicators on different components, I'm
>>> looking for a way to display status messages (like eg with jGrowl) during
>>> the long-running process (triggered by AjaxButton). I guess the only way
> to
>>> achieve this is with a solution as stated by Nishant (involving some kind
> of
>>> JS polling) ...
>>>
>>>     -Tom
>>>
>>>
>>> Am 09.04.2010 08:48, schrieb Tomasz Dziurko:
>>>
>>>    You should check visural-wicket project
>>>> (http://code.google.com/p/visural-wicket/) and live demo on
>>>> http://visural-wicket-examples.appspot.com/app/ . In "submitters"
>>>> there are some fancy looking "waiting" popup messages which could
>>>> help.
>>>>
>>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>> For additional commands, e-mail: users-help@wicket.apache.org
>>>
>>>
>>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org


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RE: How to give feedback in long-running operation within AjaxButton.onSubmit()?

Posted by Tim L Casey <tc...@cataphora.com>.

You have to watch session expiration.  This type of polling, without end,
will keep sessions alive indefinitely.

I don’t have a cut and paste code, but look at AbstractAjaxTimerBehavior.

tim

-----Original Message-----
From: Thomas Götz [mailto:tom@richmountain.de] 
Sent: Friday, April 09, 2010 12:44 AM
To: users@wicket.apache.org
Subject: Re: How to give feedback in long-running operation within
AjaxButton.onSubmit()?

Hi Ernesto,

this sounds like a viable solution, I'd be glad if you could provide me 
with some more details (e.g. code samples, if available).

    -Tom


Am 09.04.2010 09:39, schrieb Ernesto Reinaldo Barreiro:
> Hi Tom,
>
> What I do, for instance, when exporting files to PDF, Excel, etc, is start
> the process on a background thread, block the screen so that users can
only
> wait or stop the process, and use an AJAX timer to get back to the server
> every few seconds to monitor the progress and display it as progress-bar.
> This seems to work fine for me but might not be the most efficient
> solution... I can give you more details if you want.
>
> Best,
>
> Ernesto
>
> On Fri, Apr 9, 2010 at 8:55 AM, Thomas Götz<to...@richmountain.de>  wrote:
>
>> Thanks for all the hints so far, they are really helpful .... but ;)
>>
>> Well, I don't want to have busy indicators on different components, I'm
>> looking for a way to display status messages (like eg with jGrowl) during
>> the long-running process (triggered by AjaxButton). I guess the only way
to
>> achieve this is with a solution as stated by Nishant (involving some kind
of
>> JS polling) ...
>>
>>    -Tom
>>
>>
>> Am 09.04.2010 08:48, schrieb Tomasz Dziurko:
>>
>>   You should check visural-wicket project
>>> (http://code.google.com/p/visural-wicket/) and live demo on
>>> http://visural-wicket-examples.appspot.com/app/ . In "submitters"
>>> there are some fancy looking "waiting" popup messages which could
>>> help.
>>>
>>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>


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Re: How to give feedback in long-running operation within AjaxButton.onSubmit()?

Posted by Thomas Götz <to...@richmountain.de>.
Thanks!

    -Tom

Am 09.04.2010 10:55, schrieb Ernesto Reinaldo Barreiro:
> Hi Tom,
>
> Take a look at [1]...[4]. There I'm creating a thread each time the "long"
> running process is launched but maybe it would be more correct to use a
> thread pool or use scheduler  like quartz for this task. Feel free to
> use/change the code there as it best suits your needs.
>
> Ernesto



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Re: How to give feedback in long-running operation within AjaxButton.onSubmit()?

Posted by Ernesto Reinaldo Barreiro <re...@gmail.com>.
Hi Tom,

Take a look at [1]...[4]. There I'm creating a thread each time the "long"
running process is launched but maybe it would be more correct to use a
thread pool or use scheduler  like quartz for this task. Feel free to
use/change the code there as it best suits your needs.

Ernesto

References,


1-
http://code.google.com/p/antilia/source/browse/#svn/trunk/com.antilia.web/src/com/antilia/web/export
2-
http://code.google.com/p/antilia/source/browse/#svn/trunk/com.antilia.web/src/com/antilia/web/progress
3-
http://code.google.com/p/antilia/source/browse/#svn/trunk/com.antilia.export/src/com/antilia/export/pdf
4-
http://code.google.com/p/antilia/source/browse/#svn/trunk/com.antilia.export/src/com/antilia/export/excel


On Fri, Apr 9, 2010 at 9:44 AM, Thomas Götz <to...@richmountain.de> wrote:

> Hi Ernesto,
>
> this sounds like a viable solution, I'd be glad if you could provide me
> with some more details (e.g. code samples, if available).
>
>   -Tom
>
>
> Am 09.04.2010 09:39, schrieb Ernesto Reinaldo Barreiro:
>
>  Hi Tom,
>>
>> What I do, for instance, when exporting files to PDF, Excel, etc, is start
>> the process on a background thread, block the screen so that users can
>> only
>> wait or stop the process, and use an AJAX timer to get back to the server
>> every few seconds to monitor the progress and display it as progress-bar.
>> This seems to work fine for me but might not be the most efficient
>> solution... I can give you more details if you want.
>>
>> Best,
>>
>> Ernesto
>>
>> On Fri, Apr 9, 2010 at 8:55 AM, Thomas Götz<to...@richmountain.de>  wrote:
>>
>>  Thanks for all the hints so far, they are really helpful .... but ;)
>>>
>>> Well, I don't want to have busy indicators on different components, I'm
>>> looking for a way to display status messages (like eg with jGrowl) during
>>> the long-running process (triggered by AjaxButton). I guess the only way
>>> to
>>> achieve this is with a solution as stated by Nishant (involving some kind
>>> of
>>> JS polling) ...
>>>
>>>   -Tom
>>>
>>>
>>> Am 09.04.2010 08:48, schrieb Tomasz Dziurko:
>>>
>>>  You should check visural-wicket project
>>>
>>>> (http://code.google.com/p/visural-wicket/) and live demo on
>>>> http://visural-wicket-examples.appspot.com/app/ . In "submitters"
>>>> there are some fancy looking "waiting" popup messages which could
>>>> help.
>>>>
>>>>
>>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>> For additional commands, e-mail: users-help@wicket.apache.org
>>>
>>>
>>>
>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>

Re: How to give feedback in long-running operation within AjaxButton.onSubmit()?

Posted by Thomas Götz <to...@richmountain.de>.
Hi Ernesto,

this sounds like a viable solution, I'd be glad if you could provide me 
with some more details (e.g. code samples, if available).

    -Tom


Am 09.04.2010 09:39, schrieb Ernesto Reinaldo Barreiro:
> Hi Tom,
>
> What I do, for instance, when exporting files to PDF, Excel, etc, is start
> the process on a background thread, block the screen so that users can only
> wait or stop the process, and use an AJAX timer to get back to the server
> every few seconds to monitor the progress and display it as progress-bar.
> This seems to work fine for me but might not be the most efficient
> solution... I can give you more details if you want.
>
> Best,
>
> Ernesto
>
> On Fri, Apr 9, 2010 at 8:55 AM, Thomas Götz<to...@richmountain.de>  wrote:
>
>> Thanks for all the hints so far, they are really helpful .... but ;)
>>
>> Well, I don't want to have busy indicators on different components, I'm
>> looking for a way to display status messages (like eg with jGrowl) during
>> the long-running process (triggered by AjaxButton). I guess the only way to
>> achieve this is with a solution as stated by Nishant (involving some kind of
>> JS polling) ...
>>
>>    -Tom
>>
>>
>> Am 09.04.2010 08:48, schrieb Tomasz Dziurko:
>>
>>   You should check visural-wicket project
>>> (http://code.google.com/p/visural-wicket/) and live demo on
>>> http://visural-wicket-examples.appspot.com/app/ . In "submitters"
>>> there are some fancy looking "waiting" popup messages which could
>>> help.
>>>
>>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>


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Re: How to give feedback in long-running operation within AjaxButton.onSubmit()?

Posted by Ernesto Reinaldo Barreiro <re...@gmail.com>.
Hi Tom,

What I do, for instance, when exporting files to PDF, Excel, etc, is start
the process on a background thread, block the screen so that users can only
wait or stop the process, and use an AJAX timer to get back to the server
every few seconds to monitor the progress and display it as progress-bar.
This seems to work fine for me but might not be the most efficient
solution... I can give you more details if you want.

Best,

Ernesto

On Fri, Apr 9, 2010 at 8:55 AM, Thomas Götz <to...@richmountain.de> wrote:

> Thanks for all the hints so far, they are really helpful .... but ;)
>
> Well, I don't want to have busy indicators on different components, I'm
> looking for a way to display status messages (like eg with jGrowl) during
> the long-running process (triggered by AjaxButton). I guess the only way to
> achieve this is with a solution as stated by Nishant (involving some kind of
> JS polling) ...
>
>   -Tom
>
>
> Am 09.04.2010 08:48, schrieb Tomasz Dziurko:
>
>  You should check visural-wicket project
>> (http://code.google.com/p/visural-wicket/) and live demo on
>> http://visural-wicket-examples.appspot.com/app/ . In "submitters"
>> there are some fancy looking "waiting" popup messages which could
>> help.
>>
>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>

Re: How to give feedback in long-running operation within AjaxButton.onSubmit()?

Posted by Thomas Götz <to...@richmountain.de>.
Thanks for all the hints so far, they are really helpful .... but ;)

Well, I don't want to have busy indicators on different components, I'm 
looking for a way to display status messages (like eg with jGrowl) 
during the long-running process (triggered by AjaxButton). I guess the 
only way to achieve this is with a solution as stated by Nishant 
(involving some kind of JS polling) ...

    -Tom


Am 09.04.2010 08:48, schrieb Tomasz Dziurko:
> You should check visural-wicket project
> (http://code.google.com/p/visural-wicket/) and live demo on
> http://visural-wicket-examples.appspot.com/app/ . In "submitters"
> there are some fancy looking "waiting" popup messages which could
> help.
>


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Re: How to give feedback in long-running operation within AjaxButton.onSubmit()?

Posted by Tomasz Dziurko <td...@gmail.com>.
You should check visural-wicket project
(http://code.google.com/p/visural-wicket/) and live demo on
http://visural-wicket-examples.appspot.com/app/ . In "submitters"
there are some fancy looking "waiting" popup messages which could
help.

-- 
Best Regards / Pozdrawiam,
Tomasz Dziurko

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Re: How to give feedback in long-running operation within AjaxButton.onSubmit()?

Posted by Alex Objelean <al...@yahoo.com>.
The most simple way is to implement  IAjaxIndicatorAware interface on the
component wish to display the indicator. For instance, if your page
implements this interface, you will have a generic indicator for all ajax
requests inside your page. Also, you can be more specific by implementing
this interface only on a panel or a form... depends on your use-case.

Alex
 

Thomas Götz wrote:
> 
> Problem:
> I have an AjaxButton that triggers a long-running operation when clicked.
> I want to give feedback (in form of a javascript message) upon partial
> completion of the operation, therefore I am using a jQuery notifications
> plugin (http://www.programmingmind.com/contributions).
> 
> So, what I do is the following:
> 
> final Form form = new Form("form");
> add(form);
> 
> form.add(new AjaxButton("button) {
>     @Override
>     protected void onSubmit(AjaxRequestTarget target, Form<?> form) {
>         for(Object o : someList) {
>             // do somthing
>             target.appendJavascript(getJavascript());
>         }
>         target.addComponent(form);
>     }
> });
> 
> 
> ... but obviously, the Javascript messages are only display at the end of
> the complete operation (after foreach loop has finished). So my question:
> what should I do to get the messages displayed after each iteration?
> 
>    -Tom
> 
> 
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