Primefaces, Menuitem ActionListener on Right Click - jsf

Question

i'm having some questions here. I will appreciate all of your helps.
I'm making some dynamic multilevel menu in primefaces, and i did it. There are parents, sub menus, and the menu items.
I want to give some CRUD action for each component via context menu, so I can edit the value/text for each level just with right-click.
I make the menu with bean called MenussBean.java, and you can see it below (just the correspond code).
public Submenu subMenus(Submenu parentMenus,String i, int id)
{
if(i==""&&parentMenus==null)
{
subList = menusdao.getRootMenu();
for(int a=0;a<subList.size();a++){
parentMenus = new Submenu();
parentMenus.setLabel(subList.get(a).getMenu());
model.addSubmenu(parentMenus);
i=subList.get(a).getMenu();
subMen = null;
id = a+1;
subList2 = subKategori(id);
for(Menus k:subList2){
if(String.valueOf(parentMenus.getLabel().toString()).equals(i)){
subMen = new Submenu();
subMen.setId("_"+k.getId());
subMen.setLabel(k.getMenu());
parentMenus.getChildren().add(subMen);
subMenus(subMen,k.getMenu(),k.getId());
}
}
}
}else{
subMen = null;
subList2 = subKategori(id);
for(Menus k:subList2){
if(String.valueOf(parentMenus.getLabel().toString()).equals(i)){
subList3=subKategori(k.getId());
if(subList3.size()==0)
{
UIParameter uiParam = new UIParameter();
UIParameter menuParam = new UIParameter();
UIParameter idParentParam = new UIParameter();
uiParam.setName("idParam");
uiParam.setValue(k.getId());
menuParam.setName("menuParam");
menuParam.setValue(k.getMenu());
idParentParam.setName("idParentParam");
idParentParam.setValue(k.getId_parent());
MenuItem mi = new MenuItem();
mi.setId("_"+k.getId());
Application app = FacesContext.getCurrentInstance().getApplication();
MethodExpression methodExpr = app.getExpressionFactory().createMethodExpression
(FacesContext.getCurrentInstance().getELContext(), "#{menussBean.onItemClick}", null ,new Class[]{ javax.faces.event.ActionEvent.class});
mi.addActionListener(new MethodExpressionActionListener(methodExpr));
mi.setOncomplete("");
mi.setValue(k.getMenu());
mi.setTarget("_self");
mi.setTitle(k.getLink());
mi.setAjax(false);
mi.getChildren().add(uiParam);
mi.getChildren().add(menuParam);
mi.getChildren().add(idParentParam);
mi.setProcess("#all");
parentMenus.getChildren().add(mi);
}
else if (subList3.size()!=0)
{
subMen = new Submenu();
subMen.setId("_"+k.getId());
subMen.setLabel(k.getMenu());
parentMenus.getChildren().add(subMen);
subMenus(subMen,k.getMenu(),k.getId());
}
}
}
}
return parentMenus;
}
public List<Menus> subKategori(int i)
{
arayList=new ArrayList<Menus>();
for(Menus k:getList()){
if(k.getId_parent()==i){
arayList.add(k);
}
}
return arayList;
}
public static List<Menus> getList() {
return list;
}
This is the value-getter method:
public void onItemClick() {
FacesContext context = FacesContext.getCurrentInstance();
idItem = context.getExternalContext().getRequestParameterMap().get("idParam");
menuItem = context.getExternalContext().getRequestParameterMap().get("menuParam");
idParentItem = context.getExternalContext().getRequestParameterMap().get("idParentParam");
}
And I want to use context menu to give the CRUD operations, so the user can right-click on the component he wants to edit. Here is my xhtml files.
<h:form>
<p:panelMenu id="panel" style="width:400px;font-size:12px"
model="#{menussBean.model}" var="detail" selectionMode="single" ajax="true"
widgetVar = "panelMen" styleClass="myMeineClass">
</p:panelMenu>
<p:contextMenu for="panel" style="font-size:12px">
<p:menuitem value="View" icon="ui-icon-search"
oncomplete="menuDialog.show()" update="display">
<f:param name="id_barangbaru" value="#{detail}" />
</p:menuitem>
<p:menuitem value="Add" icon="ui-icon-plus" />
<p:menuitem value="Edit" icon="ui-icon-pencil" />
<p:menuitem value="Delete" icon="ui-icon-close" />
</p:contextMenu>
<p:dialog header="Menu Detail" widgetVar="menuDialog"
resizable="false" width="200" showEffect="clip" hideEffect="fold"
id="dialog" appendToBody="true" modal="true">
<h:panelGrid id="display" columns="2" cellpadding="4" style="font-size:12px">
<h:outputText value="ID:" />
<h:outputText value="#{menussBean.idItem}"
style="font-weight:bold" />
<h:outputText value="Label:" />
<h:outputText value="#{menussBean.menuItem}"
style="font-weight:bold" />
<h:outputText value="Parent:" />
<h:outputText value="#{menussBean.idParentItem}"
style="font-weight:bold" />
</h:panelGrid>
</p:dialog>
</h:form>
Right now, I'm still getting the value into the context menu output text, but it needs to be left-clicked first. I need to pass the value directly just with right-click.
So, how can I get the value with actionListener with right-click? Please help...
I want to show the screenshot but I'm new here, so I haven't got any reputation.