码迷,mamicode.com
首页 > Windows程序 > 详细

arcgis api for flex之专题图制作(饼状图,柱状图等)

时间:2015-08-16 19:43:47      阅读:306      评论:0      收藏:0      [点我收藏+]

标签:

      最近公司给我一个任务,就是利用arcgis api for flex实现在地图上点(业务数据)直接显示饼状图以及柱状图的专题图制作,而不是通过点击点显示气泡窗口的形式来实现,这个公司已经实现了。

      经过一段时间的摸索,参照一些网上资源,目前大概弄出来了,里面还有待完善的地方的。

     效果图如下:

技术分享

 

      (1)Chart.mxml,主要的展示地图专题图效果的页面 

<?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"
			   xmlns:esri="http://www.esri.com/2008/ags"
			   pageTitle="Charts in infowindow" xmlns:symbols="com.esri.ags.symbols.*">

	<fx:Style>
		.chartStyle
		{
			borderThickness: 0;
			infoPlacement: center;
			backgroundAlpha: 0;
			infoOffsetX: 0;
			infoOffsetY: 0;
			paddingLeft: 0;
			paddingRight: 0;
			paddingTop: 0;
			paddingBottom: 0;
		}
	</fx:Style>
	
	<fx:Script>
		<![CDATA[
			import com.esri.ags.geometry.MapPoint;
			import com.esri.ags.FeatureSet;
			import com.esri.ags.Graphic;
			import com.esri.ags.events.MapEvent;
			import com.esri.ags.tasks.QueryTask;
			import com.esri.ags.tasks.supportClasses.Query;
			
			import mx.collections.ArrayCollection;
			import mx.controls.Alert;
			import mx.events.FlexEvent;
			import mx.rpc.AsyncResponder;
			
			protected function myMap_initializeHandler(event:MapEvent):void
			{
				var pie:MapPoint = new MapPoint(113.55185,22.82289);
				var column:MapPoint = new MapPoint(113.59637985600011,22.758225999000047);
				var bar:MapPoint = new MapPoint(113.52757794,22.84012158);
				var gpie:Graphic = new Graphic(pie);
				var gcolumn:Graphic = new Graphic(column);
				var gbar:Graphic = new Graphic(bar);	
				//g.attributes = new Object();												
				var thematic:ArrayCollection = new ArrayCollection(
					[					
					{ Name: "危化品1", Rate: 25 },					
					{ Name: "危化品2", Rate: 15 },					
					{ Name: "危化品3", Rate: 23 } 
					]);	

				//g.attributes.thematic = thematic;	
				gpie.attributes = thematic;
				gcolumn.attributes = thematic;
				gbar.attributes = thematic;
								
				this.myGraphicsLayerpie.add(gpie);
				this.myGraphicsLayercolumn.add(gcolumn);
				this.myGraphicsLayerbar.add(gbar);
			}
		]]>
	</fx:Script>
	
	<fx:Declarations>
		<esri:InfoSymbol id="infoSymbolpie" infoRenderer="InfoRendererPieChart" containerStyleName="chartStyle">
		</esri:InfoSymbol>
		<esri:InfoSymbol id="infoSymbolcolumn" infoRenderer="InfoRendererColumnChart" containerStyleName="chartStyle">
		</esri:InfoSymbol>
		<esri:InfoSymbol id="infoSymbolbar" infoRenderer="InfoRendererBarChart" containerStyleName="chartStylee">
		</esri:InfoSymbol>
	</fx:Declarations>
	
	<esri:Map id="myMap" load="myMap_initializeHandler(event)">
		<esri:extent>
			<esri:Extent xmin="113.284171273203" ymin="22.6348519473499" xmax="113.774816132605" ymax="22.9103935318251">
				<esri:spatialReference>
					<esri:SpatialReference wkid="4326"/>
				</esri:spatialReference>
			</esri:Extent>
		</esri:extent>
		<esri:ArcGISTiledMapServiceLayer url="http://localhost:6080/ArcGIS/rest/services/ns_new/MapServer"/>
		<esri:GraphicsLayer id="myGraphicsLayercolumn" symbol="{infoSymbolcolumn}">
		</esri:GraphicsLayer>
		<esri:GraphicsLayer id="myGraphicsLayerpie" symbol="{infoSymbolpie}">
		</esri:GraphicsLayer>
		<esri:GraphicsLayer id="myGraphicsLayerbar" symbol="{infoSymbolbar}">
		</esri:GraphicsLayer>
	</esri:Map>
	
</s:Application>

(2)InfoRendererBarChart.mxml、InfoRendererColumnChart.mxml、InfoRendererPieChart.mxml,分别是柱状图以及饼状图实现的页面

1.InfoRendererBarChart.mxml

<?xml version="1.0" encoding="utf-8"?>
<s:VGroup 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"
          creationComplete="creationCompleteHandler()"
          implements="mx.core.IDataRenderer" width="100" height="100">
    <!--
         This is used by the QueryResultsWithChart sample.
    -->

    <fx:Script>
        <![CDATA[
            private var _data:Object;

            [Bindable]
            // implement IDataRenderer
            public function get data():Object
            {
                return _data;
            }

            public function set data(value:Object):void
            {
                _data = value;
            }

            private function creationCompleteHandler():void
            {

            }

        ]]>
    </fx:Script>
	<mx:BarChart id="columnChart"  width="100%" height="100%"
					dataProvider="{data}"
					showDataTips="true">
		<mx:series>
			<mx:BarSeries id="barSeries" xField="Rate"/>
		</mx:series>
		<mx:verticalAxis>
			<mx:CategoryAxis id="barAxis" categoryField="Name"/>
		</mx:verticalAxis>
		<mx:verticalAxisRenderers>
			<mx:AxisRenderer axis="{barAxis}" showLabels="false"/>
		</mx:verticalAxisRenderers>
	</mx:BarChart>

</s:VGroup>

2.InfoRendererColumnChart.mxml 

<?xml version="1.0" encoding="utf-8"?>
<s:VGroup 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"
          creationComplete="creationCompleteHandler()"
          implements="mx.core.IDataRenderer" width="100" height="100">
    <!--
         This is used by the QueryResultsWithChart sample.
    -->

    <fx:Script>
        <![CDATA[
            private var _data:Object;

            [Bindable]
            // implement IDataRenderer
            public function get data():Object
            {
                return _data;
            }

            public function set data(value:Object):void
            {
                _data = value;
            }

            private function creationCompleteHandler():void
            {

            }
        ]]>
    </fx:Script>	
	<mx:ColumnChart id="columnChart"  width="100%" height="100%"
					dataProvider="{data}"
					showDataTips="true">
		<mx:series>
			<mx:ColumnSeries id="columnSeries" yField="Rate"/>
		</mx:series>
		<mx:horizontalAxis>
			<mx:CategoryAxis id="columnAxis" categoryField="Name"/>
		</mx:horizontalAxis>
		<mx:horizontalAxisRenderers>
			<mx:AxisRenderer axis="{columnAxis}" showLabels="false"/>
		</mx:horizontalAxisRenderers>
	</mx:ColumnChart>

</s:VGroup>

3.InfoRendererPieChart.mxml

<?xml version="1.0" encoding="utf-8"?>
<s:VGroup 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"
          creationComplete="creationCompleteHandler()"
          implements="mx.core.IDataRenderer" width="100" height="100">
    <!--
         This is used by the QueryResultsWithChart sample.
    -->

    <fx:Script>
        <![CDATA[
            private var _data:Object;

            [Bindable]
            // implement IDataRenderer
            public function get data():Object
            {
                return _data;
            }

            public function set data(value:Object):void
            {
                _data = value;
            }

            private function creationCompleteHandler():void
            {

            }

        ]]>
    </fx:Script>

    <mx:PieChart id="pieChart"
                 width="100%" height="100%"
                 dataProvider="{data}"
                 showDataTips="true" >
        <mx:series>
            <mx:PieSeries field="Rate"
                          labelPosition="callout"
                          nameField="Name">
            </mx:PieSeries>
        </mx:series>
    </mx:PieChart>
	
</s:VGroup>

上述的总体实现思路是这样的:核心是InfoSymbol,InfoSymbol自定义infoRenderer绑定专题图的模版,比如InfoRendererBarChart.mxml、InfoRendererColumnChart.mxml、InfoRendererPieChart.mxml;程序初始化的时候生成了一些带有统计信息的Graphic添加到地图上,这些Graphic对象的attributes属性集合来保存各个统计的对象,每个统计的对象包含两个字段:Name表示危化品名称,Rate表示占有比重,下面我们会在InfoSymbol的定义中再次看到这两个字段。当定义好这些Graphic对象以后,我们就可以把它们添加到设置了InfoSymbol符号的GraphicLayer上了。在InfoSymbol的定义中,我们可以看到,在这个InfoSymbol中添加了一个饼图组件PieChart,这个饼图的dataProvider属性绑定的是{data},它代表的其实就是Graphic对象的attributes属性。你可以简单地这样认为:InfoSymbol中的data代表的就是其对应的Graphic对象的attributes属性。其他的柱状图也是同理的。

      既然在InfoSymbol中可以获得Graphic的属性信息,那么根据Graphic的属性信息来绘制不同的专题图就是水到渠成的事情了。

      样式代码解析:     

		.chartStyle
		{			
			borderThickness: 0; /*显示专题图的边框宽度*/
			infoPlacement: center;/*显示专题图的位置,这里是中心*/
			backgroundAlpha: 0;/*显示专题图的背景透明度,这里设置为0,是为了隐藏背景*/
			infoOffsetX: 0;/*显示专题图的X偏移,设置0,不然会偏离原始点位置*/
			infoOffsetY: 0;/*显示专题图的Y偏移,设置0,不然会偏离原始点位置*/
			paddingLeft: 0;/*显示专题图的位置偏移,设置0,不然会偏离原始点位置*/
			paddingRight: 0;/*显示专题图的位置偏移,设置0,不然会偏离原始点位置*/
			paddingTop: 0;/*显示专题图的位置偏移,设置0,不然会偏离原始点位置*/
			paddingBottom: 0;/*显示专题图的位置偏移,设置0,不然会偏离原始点位置*/
		}

需要完善优化之处:目前GraphicsLayer定义了三个(pie,bar,column),然后各自绑定不同的infoSymbol(pie,bar,column)。这样显的有点冗余了,其实只要定义一个GraphicsLayer,然后动态的判断绑定的是哪个infoSymbol。

备注:

GIS技术交流QQ群:432512093

 

       

arcgis api for flex之专题图制作(饼状图,柱状图等)

标签:

原文地址:http://www.cnblogs.com/oolili/p/4734751.html

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!