Can a Context menu recognize what component was right-clicked?

<zk>
	<window>
		<tabbox>
			<tabs>
				<tab id="tab1" label="Tab #1" context="editPopup"/>
				<tab id="tab2" label="Tab #2" context="editPopup"/>
				<tab id="tab3" label="Tab #3" context="editPopup"/>
			</tabs>
			<tabpanels>
				<tabpanel >
					<label value="Content for Tab #1"/>
				</tabpanel>
				<tabpanel>
					<label value="Content for Tab #2"/>
				</tabpanel>
				<tabpanel>
					<label value="Content for Tab #3"/>
				</tabpanel>
			</tabpanels>
		</tabbox>
		<menupopup id="editPopup">
			<attribute name="onOpen">
				if(event.isOpen()){
					Component callingComp = event.getReference();
					msg.setLabel("Called from "+callingComp.getLabel());
				}
			</attribute>
			<menuitem id="msg" />
			<menuseparator />
			<menuitem label="File" />
			<menuitem label="Edit" />
		</menupopup>
		
	</window>
</zk>