On 11/16/2011 10:38 PM, Andrea Del Bene wrote: > Are you referring to the example from book "Apache-Wicket-Cookbook", > page n°34? If so, how do you populate the list of C? Maybe you should > not set to null B model when you change value in A. > If you can try to give an example of values from A,B and C.
I solved using Ajax. In onUpdate() of AjaxFormComponentUpdatingBehavior of A, I add both components (B and C) to the target. thanks for the help A > > > On 11/16/2011 07:33 PM, Alberto wrote: >> On 11/16/2011 06:06 PM, Andrea Del Bene wrote: >>> Hi, >>> >>> can you elaborate a little bit more what behavior you want to achieve? >>> I mean, C becomes empty because A#onSelectionChanged sets its model >>> to null. This should not be strange. >> Yes, sounds obvious to me too. But I found an examples with 2 >> dropdownchoice where in onSelectionChanged() of the first one is set to >> null the model of the second one. >> For two choices works well. >> Maybe is a wrong pattern, but I not found anything useful. >> Do you have other solutions? >> >> A >> >>>> I have a form with with 3 choice components: >>>> >>>> A) DropDownChoice >>>> B) DropDownChoice >>>> C) ListMultipleChoice >>>> >>>> The values of B depend on selected value of A. >>>> The values of C depend on selected values of A and B >>>> >>>> I override the wantOnSelectionChangedNotifications() and >>>> onSelectionChanged() methods of A and B. >>>> >>>> A#onSelectionChanged >>>> @Override >>>> protected void onSelectionChanged(IntegerSelectChoice newSelection) { >>>> super.onSelectionChanged(newSelection); >>>> SearchForm.this.getModelObject().setInstrument(null); >>>> SearchForm.this.getModelObject().setParams(null); >>>> } >>>> >>>> B#onSelectionChanged >>>> @Override >>>> protected void onSelectionChanged(IntegerSelectChoice newSelection) { >>>> super.onSelectionChanged(newSelection); >>>> SearchForm.this.getModelObject().setParams(null); >>>> } >>>> >>>> In A I set to null the model value of both B and C. >>>> In B I set to null the model value only of B. >>>> >>>> This code works only on the startup of the form. When I change the >>>> value in A the list of C become empty. I have to change the value of >>>> B to fill C. >>>> http://www.corriere.it/index.shtml?refresh_ce >>>> How can I manage this? >>>> >>>> A >>>> >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org >>> For additional commands, e-mail: users-h...@wicket.apache.org >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org >> For additional commands, e-mail: users-h...@wicket.apache.org >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org > For additional commands, e-mail: users-h...@wicket.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org