Conditionally render p:selectOneRadio based on checked values of p:selectManyCheckbox - jsf

Question

I have two checkboxes.
<h:panelGrid id="userActivationGridcheckbox">
<p:selectManyCheckbox value="#{user.activationModecheckbox}" layout="pageDirection">
<f:selectItem itemLabel="Account Expiration(in days)" itemValue="byEmailcheckbox" />
<f:selectItem itemLabel="Reset User Password" itemValue="byAdmincheckbox" />
<f:ajax event="change" render="userActivationGridcheckbox" />
</p:selectManyCheckbox>
<h:panelGrid id="manualActivationGridcheckbox" rendered="#{user.manualActivationcheckbox}" columns="2">
<p:selectOneRadio value="#{user.activationModecheckbox}" layout="pageDirection">
<f:selectItem itemLabel="label1" itemValue="value1" />
<f:selectItem itemLabel="label2" itemValue="value2" />
<h:outputLabel>label</h:outputLabel>
<h:inputText value="" />
</p:selectOneRadio>
</h:panelGrid>
</h:panelGrid>
When the first checkbox is checked, then 2 more radio buttons should show up. When the second checkbox is not checked, then the radio buttons should not show up. How can I achieve this?

Answer 1

You need to decide in some listener method whether or not to show the radio group to the user, for example, by keeping a boolean in a backing bean. Then just render the component via AJAX.
Example usage:
The view:
<h:form>
<p:selectManyCheckbox id="check" value="#{bean.options}">
<p:ajax process="#this" update="radio" listener="#{bean.listener}" />
<f:selectItem itemLabel="Option 1" itemValue="Option 1" />
<f:selectItem itemLabel="Option 2" itemValue="Option 2" />
</p:selectManyCheckbox>
<h:panelGroup id="radio" layout="block">
<h:panelGrid rendered="#{bean.needsSuboptions}" columns="2">
<p:selectOneRadio value="#{bean.suboption1}" layout="pageDirection" >
<f:selectItem itemLabel="Select ---" itemValue="" />
<f:selectItem itemLabel="Suboption 1-1" itemValue="Suboption 1-1" />
<f:selectItem itemLabel="Suboption 1-2" itemValue="Suboption 1-2" />
</p:selectOneRadio>
<p:selectOneRadio value="#{bean.suboption2}" layout="pageDirection" >
<f:selectItem itemLabel="Select ---" itemValue="" />
<f:selectItem itemLabel="Suboption 2-1" itemValue="Suboption 2-1" />
<f:selectItem itemLabel="Suboption 2-2" itemValue="Suboption 2-2" />
</p:selectOneRadio>
</h:panelGrid>
</h:panelGroup>
</h:form>
And the bean:
List<String> options;//getter+setter
String suboption1;//getter+setter
String suboption2;//getter+setter
boolean needsSuboptions = false;//getter
public void listener() {
needsSuboptions = options.contains("Option 1");
}

Answer 2

You can also do with f:ajax as the code that skuntsel provided.
<f:ajax render="" execute="" listener=""/>
maps to:
<p:ajax update="" process="" listener=""/>
<p:selectManyCheckbox id="check" value="#{displayPanel.options}">
<f:ajax event="change" render="radio" listener="#{displayPanel.listener}" />
<f:selectItem itemLabel="Option 1" itemValue="Option 1" />
<f:selectItem itemLabel="Option 2" itemValue="Option 2" />
</p:selectManyCheckbox>
<h:panelGroup id="radio" layout="block">
<h:panelGrid rendered="#{displayPanel.n}" columns="2">
<p:selectOneRadio value="#{displayPanel.a}" layout="pageDirection">
<f:selectItem itemLabel="Select ---" itemValue="" />
<f:selectItem itemLabel="Suboption 1-1" itemValue="Suboption 1-1" />
<f:selectItem itemLabel="Suboption 1-2" itemValue="Suboption 1-2" />
</p:selectOneRadio>
<p:selectOneRadio value="#{displayPanel.b}" layout="pageDirection">
<f:selectItem itemLabel="Select ---" itemValue="" />
<f:selectItem itemLabel="Suboption 2-1" itemValue="Suboption 2-1" />
<f:selectItem itemLabel="Suboption 2-2" itemValue="Suboption 2-2" />
</p:selectOneRadio>
</h:panelGrid>
you forgot the provide listener for f:ajax.