extjs4 - how to a call listener of view from controller in extjs -

i made bar column chart using extjs mvc. in controller want add function click event catch selected value of column. here controller code:

ext.define('gamma.controller.controlfile', {    extend : 'ext.app.controller',    //define stores   stores : ['barcolumn','radarview','voicecallstore','smscallstore','mmscallstore','gprsusagestore'],   //define models    models : ['barcol','radar','voicecallmodel','smscallmodel','mmscallmodel','gprsusagemodel'],   //define views   views : ['barcolumnchart','linechart','radarchart','voicepie','smspie','mmspie','gprspie'],    init : function() {      this.control({      });   } }); 

please 1 me.

• on chart:

listeners : {      itemmousedown : function(obj) {                 this.fireevent('itemmousedownchartbar',obj);          } } 

at final on chart defined, after this.callparent():

this.addevents('itemmousedownchartbar'); 

• now, on controller:

'barchartview' : {       itemmousedownchartbar: this.function_to_call  }