将DateField图标放在TextInput字段的左侧

public class myDateField extends DateField
{
    override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
    {
        super.updateDisplayList(unscaledWidth,unscaledHeight);
        this.textInput.x=this.getChildAt(1).width;
        this.getChildAt(1).x = 0;
    }       
}

package com.escalationpoint.tagger.view.component
{
import mx.controls.DateField;
import mx.core.mx_internal;

use namespace mx_internal;


public class DateField extends mx.controls.DateField
{
    public function DateField()
    {
        super();
    }

    override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
    {
        // Unfortunate that we can't call super.super.updateDisplayList
        // since we're redoing work done in super.updateDisplayList.  Oh, well...
        super.updateDisplayList(unscaledWidth, unscaledHeight);

        var w:Number = unscaledWidth;
        var h:Number = unscaledHeight;

        var arrowWidth:Number = downArrowButton.getExplicitOrMeasuredWidth();
        var arrowHeight:Number = downArrowButton.getExplicitOrMeasuredHeight();

        textInput.setActualSize(w - arrowWidth - 2, h);
        textInput.move(arrowWidth + 4, 0);

        downArrowButton.setActualSize(arrowWidth, arrowHeight);
        downArrowButton.move(0, Math.round((h - arrowHeight) / 2));
    }
    }
}

override protected function updateDisplayList(unscaledWidth:Number,
                                              unscaledHeight:Number):void
{
    super.updateDisplayList(unscaledWidth, unscaledHeight);

    var w:Number = unscaledWidth;
    var h:Number = unscaledHeight;

    var arrowWidth:Number = downArrowButton.getExplicitOrMeasuredWidth();
    var arrowHeight:Number = downArrowButton.getExplicitOrMeasuredHeight();

    downArrowButton.setActualSize(arrowWidth, arrowHeight);
    downArrowButton.move(w - arrowWidth, Math.round((h - arrowHeight) / 2));

    textInput.setActualSize(w - arrowWidth - 2, h);
}