Question

我在Adobe Flash Builder中创建了Columnchart。

现在我想用Slider控制那个柱形图。我想根据滑块的值更改柱形图。

我怎样才能做到这一点？

任何建议都有帮助。在此先感谢！

Answer 1

您需要为Slider组件添加Change事件的侦听器。然后更新图表的数据提供程序并将其重新分配给图表。以下是来自Tour de Flex的修改后的示例。

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" verticalAlign="top"
    horizontalAlign="center" backgroundGradientColors="[0x000000,0x323232]" paddingTop="0" viewSourceURL="srcview/index.html">

    <mx:Script>
        <![CDATA[

        import mx.collections.ArrayCollection;

        [Bindable]
        private var medalsAC:ArrayCollection = new ArrayCollection( [
            { Country: "USA", Gold: 35, Silver:39, Bronze: 29 },
            { Country: "China", Gold: 32, Silver:17, Bronze: 14 },
            { Country: "Russia", Gold: 27, Silver:27, Bronze: 38 } ]);
        //slider change handler
        private function columnSliderChanged(event:Event):void{
            trace(columnSlider.value);//print slider
            medalsAC.getItemAt(1).Gold = columnSlider.value * 10;//assign slider value to Gold for China (item index 1)
            column.dataProvider = medalsAC;//re-assign data provider
        }
        ]]>
    </mx:Script>

    <mx:Panel title="ColumnChart Control" layout="horizontal" color="0xffffff" borderAlpha="0.15" width="600" height="240"
         paddingTop="10" paddingRight="5" paddingBottom="10" paddingLeft="5" horizontalAlign="center">

         <mx:ColumnChart id="column" height="100%" color="0x323232"
            showDataTips="true" dataProvider="{medalsAC}">

            <mx:horizontalAxis>
                <mx:CategoryAxis categoryField="Country"/>
            </mx:horizontalAxis>

            <mx:series>
                <mx:ColumnSeries xField="Country" yField="Gold" displayName="Gold"/>
                <mx:ColumnSeries xField="Country" yField="Silver" displayName="Silver"/>
                <mx:ColumnSeries xField="Country" yField="Bronze" displayName="Bronze"/>
            </mx:series>
        </mx:ColumnChart>

        <mx:Legend dataProvider="{column}" color="0x323232"/>

    </mx:Panel>
    <!-- added a slider here, updates on dragging and has a change event handler -->
    <mx:HSlider id="columnSlider" liveDragging="true" change="columnSliderChanged(event);"/>
</mx:Application>

如何在Adobe Flash Builder中使用滑块控制柱形图？

1 个答案: