extjs设置window的顶部图标

1，extjs设置window的顶部图标

tools:[ {

        type:'refresh',

        qtip: 'Refresh form Data',

        // hidden:true,

        handler: function(event, toolEl, panel){

            // refresh logic

        }

    },

     {

        type:'help',

        //qtip: 'Get Help',

        handler: function(event, toolEl, panel){

            // show help here

        }

    }, {

        type:'close',

        qtip: '关闭窗口',

        handler: function(event, toolEl, panel){

            // 关闭窗口的操作

            return;

        }

    }

    ]

2，取消默认关闭：closable:false,