Java Reference
In-Depth Information
During the render response phase, the
render
attribute is examined. The identified com-
ponents are found and asked to render themselves and their children. The components are
then packaged up and sent back to the client as a response.
Grouping of Components
The previous sections describe how to associate a single UI component with Ajax func-
tionality. You can also associate Ajax with more than one component at a time by grouping
them together on a page. The following example shows how a number of components can
be grouped by using the
f:ajax
tag.
<f:ajax>
<h:form>
<h:inputText id="input1"/>
<h:commandButton id="Submit"/>
</h:form>
</f:ajax>
In the example, neither component is associated with any Ajax
event
or
render
attrib-
utes yet. Therefore, no action will take place in case of user input. You can associate the
above components with an
event
and a
render
attribute as follows:
<f:ajax event="click" render="@all">
<h:form>
<h:inputText id="input1" value="#{user.name}"/>
<h:commandButton id="Submit"/>
</h:form>
</f:ajax>
In the updated example, when the user clicks either component, the updated results will be
displayed for all components. You can further fine tune the Ajax action by adding specific
events to each of the components, in which case Ajax functionality becomes cumulative.
Consider the following example:
<f:ajax event="click" render="@all">
...
<h:commandButton id="Submit">
<f:ajax event="mouseover"/>
</h:commandButton>
...
</f:ajax>
