ExtJS /CQ Widget API Tips

How to get the component node path dialog listeners like beforeshow, afterrender ....etc
 beforeshow : function(compDialog){
  console.log(compDialog.path);//currentNode.getPath();
 }

How to do get an AJAX call for no-cache
 var curNodeRes =  CQ.Util.eval( CQ.HTTP.noCaching(compDialog.path+".json") );  // gives json of component node/currentNode

How to get the dialog fields in listeners
  1) by using the name
   selectionchanged : function(el,val,check){
           var dialog = el.findParentByType('dialog');//gives dialog
           var field = dialog.getField('./fieldNameGivenInDialog')
          }
  2) by using id -- if the item has an id
   selectionchanged : function(el,val,check){
           var field = CQ.Ext.getCmp('id-given-for-field');
          }