带有行号列的 Flex DataGrid [英] Flex DataGrid with row number column

问题描述

我想扩展 DataGrid 组件，以便为行号提供一个(只读)列，就像您在电子表格中看到的那样.我看到这篇文章 http://www.cflex.net/showFileDetails.cfm?ObjectID=735 但这取决于每一行的数据是唯一的，以便它可以索引到数组中.如果数据不是唯一的(例如空网格)，则它不起作用.我该如何实施?

I want to extend the DataGrid component so that there is a (read-only) column for the row number like you see in spreadsheets. I came across this article http://www.cflex.net/showFileDetails.cfm?ObjectID=735 but it depends on the data being unique for each row so that it can index into the array. If the data is not unique (like for an empty grid) it doesn't work. How can I implement that?

推荐答案

我能够通过实现自定义 itemRenderer RowNumberRenderer.as 来做到这一点

I was able to do this by implementing a custom itemRenderer, RowNumberRenderer.as

package com.domain
{
    import mx.collections.IList;
    import mx.controls.Label;
    import mx.controls.listClasses.ListBase;

    public class RowNumberRenderer extends Label
    {
        public function RowNumberRenderer()
        {
            super();
        }

        override public function set data(value:Object):void
        {
            super.data = value;
            this.text = String(IList(ListBase(listData.owner).dataProvider).getItemIndex(data) + 1);                     
        }

    }
}

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