Flex3 DataGrid拖拽到ClumnChart动态显示图表

支持多行同时拖拽，重复数据不重得添加，添加了图表右键菜单.

<? 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的数据源
     [Bindable]
     private var medalsAC:ArrayCollection = new ArrayCollection( [
         { Country: "美国", Gold: 35, Silver:39, Bronze: 29 },
         { Country: "中国", Gold: 99, Silver:17, Bronze: 14 },
         { Country: "日本", Gold: 32, Silver:27, Bronze: 38 },
         { Country: "韩国", Gold: 27, Silver:27, Bronze: 2 },
         { Country: "新加坡", Gold: 55, Silver:27, Bronze: 63 },
         { Country: "朝鲜", Gold: 11, Silver:21, Bronze: 16 },
         { Country: "马来西亚", Gold: 7, Silver:14, Bronze: 77 },
          { Country: "澳洲", Gold: 0, Silver:12, Bronze: 11 } 
          ]);
      
     //ColumnChart的数据源, 默认为空  
     [Bindable]
     private var chartData:ArrayCollection = new ArrayCollection();
       [Bindable]
       private var menu:ContextMenu = new ContextMenu();    
      //让columnChart监听拖拽事件 
     private function init():void{
         column.addEventListener(DragEvent.DRAG_ENTER,dragEnterHandle);
         column.addEventListener(DragEvent.DRAG_DROP,dragdropHandle);
         //初始化右键菜单
         initMenu();
     }
      //初始化chart右键菜单
      private function initMenu():void    
      {
          var clear:ContextMenuItem = new ContextMenuItem("清空图表"); 
          menu.customItems.push(clear);
          clear.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT,clearAction);
      }    
      //处理鼠标右键事件
      private function clearAction(event:ContextMenuEvent):void
      {
          this.chartData.removeAll();
      }
      
     //因为只有DataGrid推拽，所以直接允许，如果界面上有多个控件监听拖拽事件，需要判断后允许正确的数据进入
     private function dragEnterHandle(e:DragEvent):void{
         DragManager.acceptDragDrop(e.currentTarget as UIComponent)
     }
  
     //拖拽放开后处理
     private function dragdropHandle(e:DragEvent):void{
         //往column chart的dataprovider中添加拖拽数据。
         //如果只需要特定的数据进入column chart，可以先做数据筛选。
         var datas: Array =  (e.dragInitiator as DataGrid).selectedItems;
         for(var i:int = 0; i < datas.length; i ++)
         {
             //不包含已经存在的数据再添加
             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 ="国家"    />
             < mx:DataGridColumn  dataField ="Gold"  headerText ="金牌" />
             < mx:DataGridColumn  dataField ="Silver"  headerText ="银牌" />
             < mx:DataGridColumn  dataField ="Bronze"  headerText ="铜牌" />
         </ mx:columns >
     </ mx:DataGrid >
    
      <!--  定义颜色  -->
     < mx:SolidColor  id ="sc1"  color ="yellow"  alpha =".8" />
     < mx:SolidColor  id ="sc2"  color ="0xCCCCCC"  alpha =".6" />
     < mx:SolidColor  id ="sc3"  color ="0xFFCC66"  alpha =".6" />
    
     <!--  定义颜色  -->
     < 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设置成能解析Country: "Russia", Gold: 27, Silver:27, Bronze: 38这样的数据项 -->
     < mx:ColumnChart  id ="column"  contextMenu ="{menu}"
            height ="202"  
            width ="402"  
            paddingLeft ="5"  
            paddingRight ="5"  
            showDataTips ="true"  
            dataProvider ="{chartData}"
         x ="192"  y ="215" >      
              
               <!-- 设置水平轴 -->
             < mx:horizontalAxis >
             <!-- 水平轴拖动数据到chart后的文字显示 -->
                 < mx:CategoryAxis  categoryField ="Country"   />
             </ mx:horizontalAxis >
             <!-- 设置柱子 -->
             <!-- fill填充颜色,stroke边框颜色 -->
             < mx:series >
                 < mx:ColumnSeries 
                     xField ="Country"  
                    yField ="Gold"  
                    displayName ="金牌"
                    fill ="{sc1}"   
                    stroke ="{s1}"  
                 />
                 < mx:ColumnSeries 
                     xField ="Country"  
                    yField ="Silver"  
                    displayName ="银牌"
                    fill ="{sc2}"
                    stroke ="{s2}"
                 />
                 < mx:ColumnSeries 
                     xField ="Country"  
                    yField ="Bronze"  
                    displayName ="铜牌"
                    fill ="{sc3}"
                    stroke ="{s3}"
                 />
             </ mx:series >
         </ mx:ColumnChart >

</ mx:Application >

源码下载

々上善若水々 2009-04-22 10:46 发表评论