SlickGrid show dialog by button

HTML

<script src="http://mleibman.github.io/SlickGrid/lib/jquery.event.drag-2.2.js"></script>
<script src="http://mleibman.github.io/SlickGrid/slick.core.js"></script>
<script src="http://mleibman.github.io/SlickGrid/slick.grid.js"></script>
<link rel="stylesheet" href="http://mleibman.github.io/SlickGrid/slick.grid.css">
<script src="http://mleibman.github.io/SlickGrid/slick.dataview.js"></script>
<div id="myGrid" style="width: 600px; height: 500px;"></div>

CSS

body{
    font-size:10px;    
}

JavaScript

var grid;
var dataView;

var buttonFormat = function (row, cell, value, columnDef, dataContext) {
    return "<input type='button' value='Detail' class='btn' />";    
}

var columns = [
    {id: "title", name: "Title", field: "title"},
    {id: "term", name: "Term", field: "term"},
    {id: "%", name: "% Complete", field: "percentComplete"},
    {id: "detail", name: "Detail", field: "detail",formatter: buttonFormat}
];

var options = {
    enableCellNavigation: true,
    enableColumnReorder: false
};

$(function () {
    var data = [];
    for (var i = 0; i < 30; i++) {
        var days = Math.round(Math.random() * 10);
        data[i] = {
            id: i ,
            title: "Task " + i,
            term: days + " days",
            percentComplete: Math.round(Math.random() * 100),
            description: "We are working hard " + days + " days!",
            detail: null,
            toString:function(){
                var str = "";
                str += "Title:" + this.title + "<br/>";
                str += "Term:" + this.term + "<br/>";
                str += "Comp:" + this.percentComplete + "<br/>";
                str += "<b>" + this.description + "</b>";
                return str;
            }
        };
    }
    
    dataView = new Slick.Data.DataView();    
    dataView.beginUpdate();
    dataView.setItems(data);
    dataView.endUpdate();
    
    grid = new Slick.Grid("#myGrid", dataView, columns, options);
    
    grid.onClick.subscribe(function (e, args) {
        if ($(e.target).hasClass("btn")) {
            var item = dataView.getItem(args.row);
            openDialog(item);
        }
        grid.setSelectedRows([1]);
        e.stopImmediatePropagation();
    });
    
});

var openDialog = function(row){
    var dom = "<div>" + row.toString() + "</div>";
    $(dom).dialog();
};