Flex3 DataGrid拖拽到ClumnChart動態顯示圖表

支援多行同時拖拽，重複資料不重得添加，添加了圖表右鍵菜單.

<?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="init()"><mx:Script>    <![CDATA[        import mx.controls.Alert;        import mx.controls.DataGrid;        import mx.managers.DragManager;        import mx.core.UIComponent;        import mx.collections.ArrayCollection;        import mx.events.DragEvent;                //DataGrid的資料來源     [Bindable]     private var medalsAC:ArrayCollection = new ArrayCollection( [         { Country: "美國", Gold: 35, Silver:39, Bronze: 29 },         { Country: "中國", Gold: 99, Silver:17, Bronze: 14 },         { Country: "日本", Gold: 32, Silver:27, Bronze: 38 },         { Country: "韓國", Gold: 27, Silver:27, Bronze: 2 },         { Country: "新加坡", Gold: 55, Silver:27, Bronze: 63 },         { Country: "朝鮮", Gold: 11, Silver:21, Bronze: 16 },         { Country: "馬來西亞", Gold: 7, Silver:14, Bronze: 77 },          { Country: "澳洲", Gold: 0, Silver:12, Bronze: 11 }           ]);           //ColumnChart的資料來源, 預設為空白       [Bindable]     private var chartData:ArrayCollection = new ArrayCollection();       [Bindable]       private var menu:ContextMenu = new ContextMenu();          //讓columnChart監聽拖拽事件      private function init():void{         column.addEventListener(DragEvent.DRAG_ENTER,dragEnterHandle);         column.addEventListener(DragEvent.DRAG_DROP,dragdropHandle);         //初始化右鍵菜單         initMenu();     }      //初始化chart右鍵菜單      private function initMenu():void          {          var clear:ContextMenuItem = new ContextMenuItem("清空圖表");           menu.customItems.push(clear);          clear.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT,clearAction);      }          //處理滑鼠右鍵事件      private function clearAction(event:ContextMenuEvent):void      {          this.chartData.removeAll();      }           //因為只有DataGrid推拽，所以直接允許，如果介面上有多個控制項監聽拖拽事件，需要判斷後允許正確的資料進入     private function dragEnterHandle(e:DragEvent):void{         DragManager.acceptDragDrop(e.currentTarget as UIComponent)     }       //拖拽放開後處理     private function dragdropHandle(e:DragEvent):void{         //往column chart的dataprovider中添加拖拽資料。         //如果只需要特定的資料進入column chart，可以先做資料篩選。         var datas: Array =  (e.dragInitiator as DataGrid).selectedItems;         for(var i:int = 0; i < datas.length; i ++)         {             //不包含已經存在的資料再添加             if(!chartData.contains(datas[i]))             {                 chartData.addItem(datas[i]);             }         }              }            ]]></mx:Script>    <mx:DataGrid dragEnabled="true" dataProvider="{medalsAC}"  x="192" y="52" allowMultipleSelection="true">        <mx:columns>            <mx:DataGridColumn dataField="Country" headerText="國家"  />            <mx:DataGridColumn dataField="Gold" headerText="金牌"/>            <mx:DataGridColumn dataField="Silver" headerText="銀牌"/>            <mx:DataGridColumn dataField="Bronze" headerText="銅牌"/>        </mx:columns>    </mx:DataGrid>         <!-- 定義顏色 -->    <mx:SolidColor id="sc1" color="yellow" alpha=".8"/>    <mx:SolidColor id="sc2" color="0xCCCCCC" alpha=".6"/>    <mx:SolidColor id="sc3" color="0xFFCC66" alpha=".6"/>        <!-- 定義顏色 -->    <mx:Stroke id="s1" color="yellow" weight="2"/>    <mx:Stroke id="s2" color="0xCCCCCC" weight="2"/>    <mx:Stroke id="s3" color="0xFFCC66" weight="2"/>        <!--Column chart設定成能解析Country: "Russia", Gold: 27, Silver:27, Bronze: 38這樣的資料項目-->    <mx:ColumnChart id="column" contextMenu="{menu}"            height="202"             width="402"             paddingLeft="5"             paddingRight="5"             showDataTips="true"             dataProvider="{chartData}"         x="192" y="215">                                 <!--設定水平軸-->            <mx:horizontalAxis>            <!--水平軸拖動資料到chart後的文字顯示-->                <mx:CategoryAxis categoryField="Country" />            </mx:horizontalAxis>            <!--設定柱子-->            <!--fill填充顏色,stroke邊框顏色-->            <mx:series>                <mx:ColumnSeries                     xField="Country"                     yField="Gold"                     displayName="金牌"                    fill="{sc1}"                      stroke="{s1}"                 />                <mx:ColumnSeries                     xField="Country"                     yField="Silver"                     displayName="銀牌"                    fill="{sc2}"                    stroke="{s2}"                />                <mx:ColumnSeries                     xField="Country"                     yField="Bronze"                     displayName="銅牌"                    fill="{sc3}"                    stroke="{s3}"                />            </mx:series>        </mx:ColumnChart></mx:Application>

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