selectOneMenu ajax events

Question

I am using an editable primefaces selectOneMenu to display some values  If the user selects an item from the List a textarea should be updated  However  if the user types something in the selectOneMenu  the textarea should not be updated   I  thought I could work this with ajax event out  However  I don t know which event I can use here  I only know the valueChange event  Are there any other events  like onSelect or onKeyUp   Here is my code    lt p selectOneMenu id  betreff  style  width  470px  important                 editable  true  value    post aktNachricht subject   gt               lt p ajax event  valueChange  update  msgtext                  listener    post subjectSelectionChanged     gt               lt f selectItems value    post subjectList     gt   lt  p selectOneMenu gt    lt p inputTextarea style  width 550px   rows  15  id  msgtext          value    post aktNachricht text     gt

User · Answer

Be carefull that the page does not contain any empty component which has "required" attribute as "true" before your selectOneMenu component running.
If you use a component such as

<p:inputText label="Nm:" id="id_name" value="#{ myHelper.name}" required="true"/>

then,

<p:selectOneMenu .....></p:selectOneMenu>

and forget to fill the required component, ajax listener of selectoneMenu cannot be executed.

User · Answer

The PrimeFaces ajax events sometimes are very poorly documented  so in most cases you must go to the source code and check yourself   p selectOneMenu supports change event    lt p selectOneMenu    gt       lt p ajax event  change  update  msgtext          listener    post subjectSelectionChanged     gt       lt  --   -- gt   lt  p selectOneMenu gt    which triggers listener with AjaxBehaviorEvent as argument in signature   public void subjectSelectionChanged final AjaxBehaviorEvent event

User · Answer

I d rather use more convenient itemSelect event  With this event you can use org primefaces event SelectEvent objects in your listener    lt p selectOneMenu     gt       lt p ajax event  itemSelect           update  messages          listener    beanMB onItemSelectedListener    gt   lt  p selectOneMenu gt    With such listener   public void onItemSelectedListener SelectEvent event       MyItem selectedItem    MyItem  event getObject          do something with selected value

User · Answer

You could check whether the value of your selectOneMenu component belongs to the list of subjects   Namely   public void subjectSelectionChanged            Cancel if subject is manually written     if   subjectList contains aktNachricht subject     return           Write your code here in case the user selected  or wrote  an item of the list                 Supposedly subjectList is a collection type  like ArrayList  Of course here your code will run in case the user writes an item of your selectOneMenu list

[ajax] selectOneMenu ajax events

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