I have a wicket page with a data panel that makes use of the BreadCrumbBar
(org.apache.wicket.extensions.breadcrumb). If I go down a level a new breadcrumb is automatically added and the data panel is refreshed. If I click on one of the previous breadcrumbs my data panel gets updated correctly. Now I want to make sure some extra Component on the page (the title) also gets updated. This works fine when I control the link myself, but for the breadcrumb links I don't have full control.
Is there a method of BreadCrumbBar
I can overload to add the extra Component to be refreshed? I assume the links in the BreadCrumbBar
are ajax links, but I cannot find an ajax target in the BreadCrumbBar
(or any of the child components).
By default, BreadCrumbBar
uses BreadCrumbLink
s to render its links, which are usual Link
s (and not AjaxLink
s).
To get an ajax behavior, you could try to create your own link ( BreadCrumbAjaxLink
) implementation using AjaxLink
as a base and implement in onClick(AjaxRequestTarget)
the same logic that exists in BreadCrumbLink
's onClick()
.
Then create an analogue of BreadCrumbComponent
(let's call it AjaxBreadCrumbComponent
) using your BreadCrumbAjaxLink
instead of BreadCrumbLink
.
And then override BreadCrumbBar
's newBreadCrumbComponent()
method:
protected Component newBreadCrumbComponent(final String id, final long index, final int total,
final IBreadCrumbParticipant breadCrumbParticipant)
{
boolean enableLink = getEnableLinkToCurrent() || (index < (total - 1));
return new AjaxBreadCrumbComponent(id, getSeparatorMarkup(), index, this,
breadCrumbParticipant, enableLink);
}
In BreadCrumbAjaxLink
, you could update whatever additional component you want. (You would probably need to update the bar itself too).
Since extending several classes seemed a bit overkill for my use case, I tried something different that eventually worked.
By overloading the setActive
method of the BreadCrumbBar
I could set some text to the page title model. That text was then shown on the page.
I am still not sure how the BreadCrumbBar
handles this. I think the entire page is refreshed and no ajax call is done.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.