自动伸缩LIST

/**
 * 自动伸缩LIST
 * Created by wenbo on 2015-05-08.
 */
Ext.define('Member.util.AutoHeightList', {
    extend: 'Ext.dataview.List',
    xtype : 'autoHeightList',
    constructor: function() {
        this.callParent(arguments);

        this.on({
            scope: this,
            painted: function (element, eOpts) {
                //每个item的高度相加
                var totalHeight = 0;
                var items = this.getViewItems();
                var itemsLn = items.length;
                for (i = 0; i < itemsLn; i++) {
                    item = items[i];
                    totalHeight = totalHeight + item.element.dom.clientHeight;
                }
                
                //分组标题和分组间隔相加
                var groups = this.getStore().getGroups();
                totalHeight = totalHeight + groups.length * (32+13);

                this.setHeight(totalHeight);
            }
        });
    }

});

使用场景：多个组件放在同一个panel中时