Using XML for LineChart
<!--
Code from Flex 4 Documentation "Using Adobe Flex 4".
This user guide is licensed for use under the terms of the Creative Commons Attribution
Non-Commercial 3.0 License.
This License allows users to copy, distribute, and transmit the user guide for noncommercial
purposes only so long as
(1) proper attribution to Adobe is given as the owner of the user guide; and
(2) any reuse or distribution of the user guide contains a notice that use of the user guide is governed by these terms.
The best way to provide notice is to include the following link.
To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/
-->
<!-- 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>
Related examples in the same category
