I use Wicket 1.5.10 and I'm stuck at problem with DataView.
I have overview page which contains filter and some container with elements.
You can see simple example prepared by me:
Filter contains TextField and AjaxLink.
*HTML:*
<p>
<label>Search field</label>
<input wicket:id="filteredField" type="text">
</p>
<p>
Filter Link
</p>
*JAVA*
TextField<String> filteredField = new TextField<String>("filteredField", new
PropertyModel<String>(HomePage.this, "searchLink"));
filteredField.add(new AjaxFormComponentUpdatingBehavior("onchange") {
private static final long serialVersionUID = -4317299769705904431L;
@Override
protected void onUpdate(AjaxRequestTarget target) {
//do nothing
}
});
filteredField.setOutputMarkupId(true);
add(filteredField);
add(new AjaxLink<Void>("filterLink") {
private static final long serialVersionUID = -1544074968276382557L;
@Override
public void onClick(AjaxRequestTarget target) {
target.add(dataViewContainer);
try {
// use to demonstare the problem
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
Container with elements is DataView where each element is Link.
*JAVA*:
private class MyDataView extends DataView<String> {
private static final long serialVersionUID = -4473460467718688831L;
protected MyDataView(String id) {
super(id, new MyDataProvider());
}
@Override
protected void populateItem(Item<String> item) {
Link<Void> link = new Link<Void>("elementLink") {
private static final long serialVersionUID =
1582520788088815276L;
@Override
public void onClick() {
}
};
link.add(new Label("label", item.getModelObject()));
item.add(link);
}
}
*HTML*:
<div wicket:id="dataViewContainer">
<div wicket:id="dataView">
</div>
</div>
If I click on "filterLink" and then immediately click on some link in
DataView, then Wicket throws exception:
<pre>
org.apache.wicket.request.handler.ComponentNotFoundException: Could not find
component 'dataViewContainer:dataView:5:elementLink' on page 'class
com.mycompany.HomePage
at
org.apache.wicket.request.handler.PageAndComponentProvider.getComponent(PageAndComponentProvider.java:181)
at
org.apache.wicket.request.handler.ListenerInterfaceRequestHandler.getComponent(ListenerInterfaceRequestHandler.java:92)
at
org.apache.wicket.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:239)
at
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:784)
at
org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
at
org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:255)
at
org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:212)
at
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:283)
at
org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:188)
at
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:244)
</pre>
We meet this problem very often when our customers do not wait for response
and click on a link in DataView.
What do I have to do in this case? What approach is the best here?
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