Hi Martin.

OK, thanks. That looks like a doable solution.
I'd go for the Listener but I'll probably have to ask some more when I'm
going to implement it.


Manfred



Martin Grigorov-4 wrote
> Hi Manfred,
> 
> The #refresh(PartialPageUpdateHandler) methods are useful if you update
> the
> specific component.
> They do not help if you repaint a parent of such a component.
> In your case you will need to destroy the component (grid, chart) in your
> action callback (e.g. onUpdate(), onClick()).
> You can do this in your code or with AjaxRequestTarget.Listener. If you do
> the Listener then you can donate it to Wicket JQuery UI project.
> 
> On Tue, Sep 10, 2019 at 10:52 AM Manfred Bergmann <

> mb@

> >
> wrote:
> 
>> Hi Sebastian.
>>
>> Thanks for the additional explanation.
>> But I'm not fully sure for how this is supposed to work in my case given
>> this structure/hierarchy:
>> page -> panel(a) -> panel(b) -> grid/chart
>>
>> Where panel (a) is replaced. Any instance of panel (b) can have a
>> grid/chart
>> but it can also host something else (depends on what is being displayed).
>> I understand that when panel (a) is replaced it is garbage collected and
>> all
>> content on it as well in which case a reload for the grid/chart on
>> panel(b)
>> won't work?
>>
>>
>> Regards,
>> Manfred
>>
>>
>>
>>
>> Sebastien wrote
>> > Hi Manfred,
>> >
>> > Sorry, my previous answer was incomplete.
>> > Kendo components do usually have two methods for ajax, #reload and
>> > #refresh.
>> > Reload aims to reload the component (ie reattach to the dom) while
>> refresh
>> > aim to refresh the data only.
>> > IIRC, grid and chart are different in the sense that grid does have its
>> > datasource aware of the request cycle so it is safe to reattach/reload
>> the
>> > component, the datasource will be destroyed from the dom. That's
>> > unfortunately not the case of the chart (you can open an issue, I can
>> try
>> > to figure out if it's achievable).
>> > One nice way to refresh the data without having the reload/reattach the
>> > component is to use the event bus. Your master page/component will
>> > send/broadcast a RefreshEvent or RefreshChatEvent that will be catched
>> by
>> > the component hosting the chart (or the chart itself if you have
>> overriden
>> > it). Then just call refesh...
>> >
>> > Thanks and best regards,
>> > Sebastien
>> >
>> >
>> > On Mon, Sep 9, 2019, 23:29 Manfred Bergmann <
>>
>> > mb@
>>
>> > > wrote:
>> >
>> >> Hi Sebastian.
>> >>
>> >> OK, but I don't really see how reusing instances of a Kendo Grid
>> really
>> >> works in a component based design where the parents of where the Grids
>> >> are
>> >> placed are replaced on the page.
>> >>
>> >> In particular we have a three panes border layout, kind of a
>> >> 'master-detail'
>> >> plus a tree on the left side.
>> >> The right most pane is the 'detail' pane where panels are replaced
>> >> depending
>> >> on selection on the 'master' pane. Those panels can contain Kendo Grid
>> >> but
>> >> some do not. So I have no other chance of creating new instances of
>> Kendo
>> >> Grids (DataTable).
>> >> So switching through the 'master' selections creates new Kendo Grids,
>> or
>> >> Charts adding up datasources on the DOM root.
>> >>
>> >> I don't see how just using Chart/DataTable#refresh really should work?
>> >>
>> >>
>> >> Manfred
>> >>
>> >>
>> >>
>> >> Sebastien wrote
>> >> > Hi Manfred,
>> >> >
>> >> > The recommended way to refresh kendo ui components - those bound to
>> a
>> >> > datasource - is to read from the datasource.
>> >> >
>> >> > See Chart#refresh, it should solve the problem.
>> >> >
>> >> > Thanks and best regards,
>> >> > Sébastien
>> >>
>> >>
>> >>
>> >> --
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>> >>
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>>
>>
>>
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