How to handle a return value from callback handler in Seam remoting

asookazian Aug 2, 2010 1:54 PM

Please describe how I can return the boolean value from the js function below to the caller in the onclick event handler. It's not working this way.

<script type="text/javascript">
     function showWarning() {     
         var myVar;     
         var callback = function(result) { 
                                  if (result == null || result == '') {
                                        myVar = confirm('No interchange programs were assigned to rate category.  Are you sure you want to proceed with saving?');
                                        alert('myVar = '+myVar);
                                                        //return myVar; <-- is it legal to return from here and will it get back to the caller in the onclick handler?                                        
                                 }
                                  else {
                                        myVar = true;
                                  }
                              };
         Seam.Remoting.getContext().setConversationId( #{conversation.id} );
         Seam.Component.getInstance("merchantBillingGroupEditorUI").getSelectedRateCategory(callback);   
         alert('myVar 2nd time = '+myVar);
         return myVar;      
         
         /*var result = Seam.Component.getInstance("merchantBillingGroupEditorUI").getSelectedRateCategory();
         alert('result = '+result);
         if (result == null || result == '') {
                  return confirm('No interchange programs were assigned to rate category.  Are you sure you want to proceed with saving?');                                        
         }*/
     }

<a4j:commandLink styleClass="widget_button"
                rendered="#{pageaction != 'view'}"
                style="float:right"
                action="#{merchantBillingGroupEditorUI.submit}"
                onclick="if (!showWarning()) return false;">
                <span><h:outputText value="Finish" /></span>
                <j4j:idProxy id="nextButton" />
            </a4j:commandLink>