File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes JSF and the fly likes ajax and p:picklist (PrimeFaces) Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » JSF
Bookmark "ajax and p:picklist (PrimeFaces)" Watch "ajax and p:picklist (PrimeFaces)" New topic

ajax and p:picklist (PrimeFaces)

massimo tarantelli
Ranch Hand

Joined: Jun 19, 2012
Posts: 35

Hello guys, here the issue:
I need to update the disable attribute of a commandButton based of the number of item in the picklist target, in particular if the target size is 0 the button must be disabled.
here my code (i'm using PrimeFaces 3.4):


The idea was to use the setter method of the pickSize component in a non-ortodox way...
So, when an user transfer an item, the ajax will execute the hidden inputText trought its setter that in turn will set the size value in the pickSize, and finally it will change the value of the disabled attribute of the button.
...I have this is the track error:
any suggestion? thanks guys.

Tim Holloway
Saloon Keeper

Joined: Jun 25, 2001
Posts: 17417

You're doing this the hard way. The hidden control is not going to gain you anything.

You're also not defining the selectItems properly for the pickList. Unfortunately, you didn't include the definitions, and the stacktrace error messages for dropdown list-style controls are famously useless, so we'll need specific data.

An IDE is no substitute for an Intelligent Developer.
massimo tarantelli
Ranch Hand

Joined: Jun 19, 2012
Posts: 35

thanks for the answer, i have sorted out the problem in this way:

ajax now works.
Anyway it evaluates the target size before the transfer, so it's always one click shifted...
how can I sort out it?
I agree. Here's the link:
subject: ajax and p:picklist (PrimeFaces)
It's not a secret anymore!