extjs - Grid - button click handler -

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in grid, when click on action button (the delete , edit button shown in code below), need pop open window without alerting user alert message;

in following code using handler handler: buttonclicked , trying access row value clicked different function below; buttonclicked :function (){...

1.) don't know how this, can please me ?

2.) can access row clicked , display name controller class ?

   ext.define('countryapptest.view.user.gridview' ,{ extend: 'ext.grid.panel', initcomponent: function() {  this.store = 'store';         this.columns = [ {    xtype:'ac',        items: [{           {          icon: 'lib/extjs/examples/restful/images/delete.png',         handler  : buttonclicked     }] },         { text: "username", dataindex: 'username' }          ];               this.viewconfig = {                 forcefit: true         };         this.callparent(arguments);     },     buttonclicked:function  (grid, rowindex, colindex) {         var rec = grid.getstore().getat(rowindex);         ext.msg.alert("info","name " + rec.get('username'));     }     });

add parameters (grid, rowindex, colindex) buttonclicked declaration.


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