Spring Faces valueChangeListener actionChangeListener

[hcrubjeff]

Can someone give a pointer to a good explanation of how the change listener functionality works in the faces support?

I didn't see any references to the concept in the reference.

I would really like to understand how it works, but for a specific example of what I am trying to migrate.

I have two dropdowns. The selection of the first dropdown loads the values of the second dropdown.

<h:selectOneMenu id="topic"
value="#{model.topic}"
valueChangeListener="#{model.topicChanged}"
onchange=submit();">
<f:selectItems value="#{model.topicList}"/>
</h:selectOneMenu>

When a selection in the topic dropdown, the model.topicChanged loads the subtopic values.

<h:selectOneMenu id="subTopic"
rendered="#{model.displaysubTopic}"
value="#{model.utility}"
valueChangeListener="#{model.subTopicChanged}"
onchange="submit()">
<f:selectItems value="#{model.subTopicList}"/>
</h:selectOneMenu>

[davidsk]

I am also looking for the solution. Have you solved it?