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

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.

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

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   lt p inputText label  Nm   id  id name  value     myHelper name   required  true   gt    then    lt p selectOneMenu       gt  lt  p selectOneMenu gt    and forget to fill the required component  ajax listener of selectoneMenu cannot be executed

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

[ajax] selectOneMenu ajax events

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