根据Flex中的多个条件更改数据网格单元格的背景颜色

Question

嗨,我是Adobe Flex的新手,如果我的问题听起来很愚蠢,请道歉.无论如何这里是.我正在尝试简单的数据网格,它基本上检查2个条件1)如果艺术家是01而专辑是'专辑01',则将背景设置为列'年'中的相应单元格.

使用我的下面的代码'设置样式'到背景颜色,因为属性不起作用但更改字体颜色正在工作,其次我不知道如何编写代码以使上述嵌套条件工作？如果有人能在这方面帮助我,我将非常感激.谢谢!提前.

下面是代码:Newdatagrid.mxml

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
           xmlns:s="library://ns.adobe.com/flex/spark" 

           xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955"          minHeight="600" >
<fx:Script>
    <![CDATA[
        import mx.collections.ArrayCollection;
        import mx.controls.Alert;
        [Bindable]
        public static var initDG:ArrayCollection = new ArrayCollection([
            {Artist:'01', Album:'Album 01', Year:'2008'},
            {Artist:'01', Album:'Album 02', Year:'2009'},
            {Artist:'03', Album:'Album 03', Year:'2007'},
            {Artist:'03', Album:'Album 04', Year:'2003'},

        ]); 

    ]]>

</fx:Script>


<s:VGroup>
    <s:DataGrid id="myGrid" width="360" dataProvider="{initDG}">   
        <s:columns>
            <s:ArrayList>
                <s:GridColumn dataField="Artist"    headerText="Artist" itemRenderer="CellRenderer"/>
                <s:GridColumn dataField="Album" headerText="Album" itemRenderer="CellRenderer"/>
                <s:GridColumn dataField="Year" headerText="Year" itemRenderer="CellRenderer"/>
            </s:ArrayList>
        </s:columns>       
    </s:DataGrid> 
</s:VGroup>
</s:Application>

渲染:

<?xml version="1.0" encoding="utf-8"?>
<s:GridItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009" 
                xmlns:s="library://ns.adobe.com/flex/spark" 
                xmlns:mx="library://ns.adobe.com/flex/mx" 
                    implements="mx.controls.listClasses.IDropInListItemRenderer">
<fx:Script>
    <![CDATA[
        import mx.controls.dataGridClasses.DataGridListData;
        import mx.controls.listClasses.BaseListData;
        import mx.controls.Alert;

        private var _listData:BaseListData;

        [Bindable]private var isSelected:Boolean = false;

        override public function set data( value:Object ) : void 
        {
            super.data = value;
            lblData.text = data[column.dataField];

            if (data[column.dataField].valueOf() >= 2008){
                //styleName="myStyles.BgColor";
                setStyle('backgroundColor',0xFFFF00);
            }else{
                setStyle('backgroundColor',0x32CD32);
            }

        }

        [Bindable]public function get listData() : BaseListData
        {
            return _listData;
        }
        public function set listData( value:BaseListData ) : void
        {
            _listData = value;
        }

    ]]>
</fx:Script>
<s:Label id="lblData" top="9" left="7" width="100%" height="100%"    textAlign="center"/>

</s:GridItemRenderer>

我想要的输出:条件:如果Artist = 01且Year> = 2008,那么单元格背景将变为红色

Answer 1

GridItemRenderer类没有这样的样式backgroundColor.所以设置它没有任何效果.

你可以做的是在ItemRenderer中添加一个Rect,并根据你的条件设置它的颜色属性.

一个例子是这样的:

<?xml version="1.0" encoding="utf-8"?>
<s:GridItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009" 
                    xmlns:s="library://ns.adobe.com/flex/spark" 
                    xmlns:mx="library://ns.adobe.com/flex/mx" clipAndEnableScrolling="true">

    <fx:Script>
        <![CDATA[
            override public function prepare(hasBeenRecycled:Boolean):void {


                if(this.data) {

                    if(this.data.Year >= 2008 && this.data.Artist == '01' && column.dataField == 'Year') 
                        bgColor.color = 0xFF0000;
                    else
                        bgColor.color = 0xFFFFFF;
                }
            }
        ]]>
    </fx:Script>

    <s:Rect top="0" bottom="0" left="0" right="0">
        <s:fill>
            <s:SolidColor id="bgColor" color="0xFFFFFF"/>
        </s:fill>
    </s:Rect>
    <s:Label id="labelDisplay" top="9" left="7"/>

</s:GridItemRenderer>