Re: Partial update of DataGridView when adding new items
Hi Chris, Please read https://wicketinaction.com/2008/10/repainting-only-newly-created-repeater-items-via-ajax/ The article explains how to do this with ListView but the idea is the same for all other repeaters. On Wed, Dec 4, 2019 at 6:53 AM Chris Colman wrote: > We're using a DataGridView and we're happily doing partial updates of > existing items for select/deselect and when content changes. > > Updating existing items is fine because we can work out the changed Item > (Component) and just add it to the AJAX request target. > > However, we're wondering if it's possible to do partial updates of newly > added items? Currently for that we're adding the whole DataGridView to > the AJAX target but it causes a refresh which resets the current scroll > position so it's a bit annoying to the user. > > The trouble is we add new model items to the underlying collection that > the IDataProvider exposes but not sure how we work out which Item is > added for that and then how to tell it to update just that item in the UI. > > > > > - > To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org > For additional commands, e-mail: users-h...@wicket.apache.org > >
Re: Partial
Hi,
On Wed, Apr 24, 2019 at 8:14 PM Sibgha Nazir wrote:
> I make the call like this
>
> @Override
>
> *public* *void* renderHead(IHeaderResponse response)
>
> {
>
> *super*.renderHead(response);
>
>
>
> Optional target = RequestCycle.*get*
> ().find(AjaxRequestTarget.*class*);
>
>
> *if* (!target.equals(Optional.*empty*()))
>
You can use target.isPresent()
>
> renderChart(target.get());
>
> }
>
You are trying to update a component after the rendering process has been
started.
As the exception message tries to explain this is not allowed.
Wicket request cycle is split in two phases - the action phase and the
render phase.
The action phase is when a callback method like onClick, onUpdate, onXyz is
called. Here you can manipulate the component tree in any ways.
Once the action phase is finished Wicket starts rendering - the complete
page for non-Ajax requests or only the components added to
AjaxRequestTarget for the Ajax ones.
It works fine in the first request because it is a non-Ajax one and
RequestCycle.find(AjaxRequestTarget) returns an empty Optional, so nothing
is being done there.
You need to move this code either to the action phase or to onConfigure()
>
> On Wed, Apr 24, 2019 at 7:00 PM Martin Grigorov
> wrote:
>
> > Hi,
> >
> > On Wed, Apr 24, 2019 at 5:08 PM Sibgha Nazir
> wrote:
> >
> > > Hello wicket developer,
> > >
> > > I am facing the following exception on re-rendering a wicket panel
> using
> > > the code
> > >
> > >
> > >
> > > iPartialPageRequestHandler.add(chartPanel);
> > >
> >
> > In which method of your code do you make that call ?
> > How do you get a reference to iPartialPageRequestHandler? Is it passed
> as a
> > parameter to the method by Wicket or do you look it up by using
> > RequestCycle.find(Class) ?
> >
> >
> > >
> > > java.lang.IllegalStateException: A partial update of the page is being
> > > rendered, component [ChartPanel [Component id = chart-container]] can
> no
> > > longer be added
> > >
> > > It renders it perfectly the first time. But I want to call this again
> and
> > > again when user clicks refresh button. What does this mean?
> > >
> > > Best Regards,
> > > Sibgha Nazir
> > >
> >
>
Re: Partial
I make the call like this
@Override
*public* *void* renderHead(IHeaderResponse response)
{
*super*.renderHead(response);
Optional target = RequestCycle.*get*
().find(AjaxRequestTarget.*class*);
*if* (!target.equals(Optional.*empty*()))
renderChart(target.get());
}
On Wed, Apr 24, 2019 at 7:00 PM Martin Grigorov
wrote:
> Hi,
>
> On Wed, Apr 24, 2019 at 5:08 PM Sibgha Nazir wrote:
>
> > Hello wicket developer,
> >
> > I am facing the following exception on re-rendering a wicket panel using
> > the code
> >
> >
> >
> > iPartialPageRequestHandler.add(chartPanel);
> >
>
> In which method of your code do you make that call ?
> How do you get a reference to iPartialPageRequestHandler? Is it passed as a
> parameter to the method by Wicket or do you look it up by using
> RequestCycle.find(Class) ?
>
>
> >
> > java.lang.IllegalStateException: A partial update of the page is being
> > rendered, component [ChartPanel [Component id = chart-container]] can no
> > longer be added
> >
> > It renders it perfectly the first time. But I want to call this again and
> > again when user clicks refresh button. What does this mean?
> >
> > Best Regards,
> > Sibgha Nazir
> >
>
Re: Partial
In renderChart there is a line updating the chart panel like this
PartialPageRequestHandler.add(chartPanel);
On Wed, Apr 24, 2019 at 8:06 PM Sibgha Nazir wrote:
> I make the call like this
>
> @Override
>
> *public* *void* renderHead(IHeaderResponse response)
>
> {
>
> *super*.renderHead(response);
>
>
>
> Optional target = RequestCycle.*get*
> ().find(AjaxRequestTarget.*class*);
>
>
> *if* (!target.equals(Optional.*empty*()))
>
> renderChart(target.get());
>
> }
>
> On Wed, Apr 24, 2019 at 7:00 PM Martin Grigorov
> wrote:
>
>> Hi,
>>
>> On Wed, Apr 24, 2019 at 5:08 PM Sibgha Nazir wrote:
>>
>> > Hello wicket developer,
>> >
>> > I am facing the following exception on re-rendering a wicket panel using
>> > the code
>> >
>> >
>> >
>> > iPartialPageRequestHandler.add(chartPanel);
>> >
>>
>> In which method of your code do you make that call ?
>> How do you get a reference to iPartialPageRequestHandler? Is it passed as
>> a
>> parameter to the method by Wicket or do you look it up by using
>> RequestCycle.find(Class) ?
>>
>>
>> >
>> > java.lang.IllegalStateException: A partial update of the page is being
>> > rendered, component [ChartPanel [Component id = chart-container]] can no
>> > longer be added
>> >
>> > It renders it perfectly the first time. But I want to call this again
>> and
>> > again when user clicks refresh button. What does this mean?
>> >
>> > Best Regards,
>> > Sibgha Nazir
>> >
>>
>
Re: Partial
Hi, On Wed, Apr 24, 2019 at 5:08 PM Sibgha Nazir wrote: > Hello wicket developer, > > I am facing the following exception on re-rendering a wicket panel using > the code > > > > iPartialPageRequestHandler.add(chartPanel); > In which method of your code do you make that call ? How do you get a reference to iPartialPageRequestHandler? Is it passed as a parameter to the method by Wicket or do you look it up by using RequestCycle.find(Class) ? > > java.lang.IllegalStateException: A partial update of the page is being > rendered, component [ChartPanel [Component id = chart-container]] can no > longer be added > > It renders it perfectly the first time. But I want to call this again and > again when user clicks refresh button. What does this mean? > > Best Regards, > Sibgha Nazir >
Re: partial Updating dataview with ajax
http://wicketinaction.com/2008/10/repainting-only-newly-created-repeater-items-via-ajax/ -igor 2011/2/8 LePirlouit Benoît lepirlo...@hotmail.com: Hi All, I'm currently using an AbstractAjaxTimerBehavior witch refresh onTimer the dataview I want to append some components to my dataview . drax them on the page without refreshing all the others components that are allready on the page. eg in a realtime chat. you have only to load the new message in ajax without loading all the historical messages. in javascript I 'll do something like Append Before or Append After I don't know how to do this with wicket. also posted on : http://apache-wicket.1842946.n4.nabble.com/partial-Updating-dataview-with-ajax-td3275925.html Benoît de Biolley - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
