<cfform format="flash" name="test" onload="setCellRenderer();">
<cfformitem type="script">

function setCellRenderer(){
testGrid.getColumnAt(2).cellRenderer = ComboBoxCell;
}
</cfformitem>
<cfformitem type="spacer"/>
<cfformgroup type="horizontal">
<cfgrid name="testGrid" width="260" selectmode="edit">
<cfgridcolumn name="dataCol" header="data col" width="100">
            <cfgridrow data="data,low">
            <cfgridrow data="data,medium">
            <cfgridrow data="data">
<cfgridcolumn name="sel" header="select" width="200">
</cfgrid>
       <cfinput type="button" name="testbtn" value="Show Value in Grid" onclick="alert(testGrid.selectedItem.sel);">
   </cfformgroup>
</cfform>

import mx.core.UIComponent
import mx.controls.ComboBox

class ComboBoxCell extends UIComponent
{
   var combo : MovieClip;
   var owner : MovieClip;   // The row that contains the cell.    var listOwner : MovieClip; // the reference we receive to the list    var getCellIndex : Function; // the function we receive from the list    var   getDataLabel : Function; // the function we receive from the list    private static var COMBOBOX_DATA_PROVIDER : Array = [{label:"", data:""},
                              {label: "unrated", data: "unrated"},
                              {label: "low", data: "low"},
                              {label: "medium", data: "medium"},
                              {label: "high", data: "high"}];
   function ComboBoxCellRenderer()
   {
   }

   function createChildren(Void) : Void
   {      
      //Creates a ComboBox object and listen to changes       combo = createObject("ComboBox", "Combo", 0, {styleName:this, owner:this});
      combo.addEventListener("change", this);
      combo.dataProvider = COMBOBOX_DATA_PROVIDER;
      size();
   }

   // note that setSize is implemented by UIComponent    //and calls size(), after setting    // __width and __height    function size(Void) : Void
   {
      
   var h = __height;
var w = __width;
combo.setSize(w - 2, Math.max(h, listOwner.rowHeight - 2));   
   }

public function setValue(str:String, item:Object, sel:Boolean) : Void
   {
      /* Sets the ComboBox to the correspoinding
      cell data from the list owner's data provider
      if the cell data matches
      with any items available for the ComboBox. */
      
      var drawCombo:Boolean = true;
      if (item[getDataLabel()]!=undefined)
      {
         /* For each item's data in the ComboBox, verify if it matches
         the assigned data for the cell this ComboBox is in.
         Set the selectedIndex of the ComboBox to what matches. */
         for(var i:Number = 0; i < combo.length; i++)
         {
            if( combo.getItemAt(i).data == item[getDataLabel()] )
            {
               combo.selectedIndex = i;
               break;
            }
            if ( i == combo.length - 1 )
            {
               // There was no matching data, the ComboBox should not be shown.                //drawCombo = false;                // The original function hid the combobox if no data, i leave it in             }
         }
      }
      else
      {
         // There was no data, set the combobox to blank          combo.selectedIndex = 0;
      }
      
      combo._visible = drawCombo;
   }

   function getPreferredHeight(Void) : Number
   {
      return owner.__height;
   }

   function getPreferredWidth(Void) : Number
   {
      return owner.__width;
   }
   // This re-builds the dataProvider, the selected item    // as the first in the array    function reorder(datos:Array, choice:String):Array {
      var index:Number = 0
      var newArray = new Array()
      for(var i=0; i<datos.length; i++){      
         if(datos[i].label!=choice){
            index++
            newArray[index] = datos[i]
         } else newArray[0] = datos[i]
      }   
      return newArray
   }


   
   public function change()
   {
      // Handler for the ComboBox change event.       
      // Set the listOwner's data to the currently selected item's data of the combo box.       listOwner.dataProvider.editField(getCellIndex().itemIndex, getDataLabel(), combo.selectedItem.data);   
      listOwner.selectedIndex = getCellIndex().itemIndex;
   }

}