Variable Series for LineChart : Line Chart « Chart « Flex






Variable Series for LineChart

Variable Series for LineChart
       

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    <!-- charts/VariableSeries.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
    xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:s="library://ns.adobe.com/flex/spark"
    creationComplete="initApp();" height="600">
    <fx:Script> 
        import mx.charts.series.LineSeries; 
        import mx.charts.DateTimeAxis; 
        [Bindable] 
        private var myXML:XML = <dataset> 
            <item> 
            <who>Tom</who> 
            <when>08/22/2006</when> 
            <hours>5.5</hours> 
            </item> 
            <item> 
            <who>Tom</who> 
            <when>08/23/2006</when> 
            <hours>6</hours> 
            </item> 
            <item> 
            <who>Tom</who> 
            <when>08/24/2006</when> 
            <hours>4.75</hours> 
            </item> 
            <item> 
            <who>Dick</who> 
            <when>08/22/2006</when> 
            <hours>6</hours> 
            </item> 
            <item> 
            <who>Dick</who> 
            <when>08/23/2006</when> 
            <hours>8</hours> 
            </item> 
            <item> 
            <who>Dick</who> 
            <when>08/24/2006</when> 
            <hours>7.25</hours> 
            </item> 
            <item> 
            <who>Jane</who> 
            <when>08/22/2006</when> 
            <hours>6.5</hours> 
            </item> 
            <item> 
            <who>Jane</who> 
            <when>08/23/2006</when> 
            <hours>9</hours> 
            </item> 
            <item> 
            <who>Jane</who> 
            <when>08/24/2006</when> 
            <hours>3.75</hours> 
            </item> 
            </dataset>; 
        public function initApp():void { 
            var wholist:Array = new Array(); 
            for each(var property:XML in myXML.item.who) { 
                // Create an Array of unique names. 
                if (wholist[property] != property) 
                    wholist[property] = property; 
            } 
            // Iterate over names and create a new series 
            // for each one. 
            for (var s:String in wholist) { 
                // Use all items whose name matches s. 
                var localXML:XMLList = myXML.item.(who==s); 
                // Create the new series and set its properties. 
                var localSeries:LineSeries = new LineSeries(); 
                localSeries.dataProvider = localXML; 
                localSeries.yField = "hours"; 
                localSeries.xField = "when"; 
                // Set values that show up in dataTips and Legend. 
                localSeries.displayName = s; 
                // Back up the current series on the chart. 
                var currentSeries:Array = myChart.series; 
                // Add the new series to the current Array of series. 
                currentSeries.push(localSeries); 
                // Add the new Array of series to the chart. 
                myChart.series = currentSeries; 
            } 
            // Create a DateTimeAxis horizontal axis. 
            var hAxis:DateTimeAxis = new DateTimeAxis(); 
            hAxis.dataUnits = "days"; 
            // Set this to false to display the leftmost label. 
            hAxis.alignLabelsToUnits = false; 
            // Take the date in its current format and create a Date 
            // object from it. 
            hAxis.parseFunction = createDate; 
            myChart.horizontalAxis = hAxis; 
        } 
        public function createDate(s:String):Date { 
            // Reformat the date input to create Date objects 
            // for the axis. 
            var a:Array = s.split("/"); 
            // The existing String s is in the format "MM/DD/YYYY". 
            // To create a Date object, you pass "YYYY,MM,DD", 
            // where MM is zero-based, to the Date() constructor. 
            var newDate:Date = new Date(a[2],a[0]-1,a[1]); 
            return newDate; 
        } 
      </fx:Script>
    <s:layout>
        <s:VerticalLayout />
    </s:layout>
    <s:Panel title="Line Chart with Variable Number of Series">
        <s:layout>
            <s:HorizontalLayout />
        </s:layout>
        <mx:LineChart id="myChart" showDataTips="true" />
        <mx:Legend dataProvider="{myChart}" />
    </s:Panel>
</s:Application>

   
    
    
    
    
    
    
  








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