Portal Showcase
f:valueChangeListener
It's easy to implement a custom ValueChangeListener and use it in any EditableValueHolder Facelet component.General Usage
Settype
attribute with a fully qualified Java class name implementing ValueChangeListener to be applied when the parent EditableValueHolder value changes. Important note: there is usually confusion about ValueChangeListener and client-side events. ValueChangeListener are only server-side related events. For using client-side ones, just use any of the provided mechanism (f:ajax
with event
attribute, etc).
Source Code
<ui:composition xmlns="http://www.w3.org/1999/xhtml" xmlns:f="http://xmlns.jcp.org/jsf/core" xmlns:h="http://xmlns.jcp.org/jsf/html" xmlns:ui="http://xmlns.jcp.org/jsf/facelets"> <h:form> <h:messages layout="table" /> <h:inputText value="#{validationModelBean.otherText}" label="#{i18n['f-validator-label']}"> <f:valueChangeListener type="com.liferay.faces.showcase.bean.ShowcaseValueChangeListener"/> </h:inputText> <h:commandButton value="#{i18n['submit']}"> <f:ajax execute="@form" render="@form"/> </h:commandButton> </h:form> </ui:composition>
public class ShowcaseValueChangeListener implements ValueChangeListener { @Override public void processValueChange(ValueChangeEvent event) throws AbortProcessingException { FacesContext facesContext = FacesContext.getCurrentInstance(); FacesMessage facesMessage = new FacesMessage("The valueChangeListener was called." + "The new value is " + event.getNewValue()); facesContext.addMessage(null, facesMessage); } }
Liferay Faces Bridge Implementation 5.0.0 + Liferay Faces Portal 5.0.0 + Showcase Common 3.1.1 + Liferay Faces Util 3.4.1 + Mojarra 2.2.20