Jeff Olajos created FLEX-34768:
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Summary: Memory Leak - Chart Column/Bar Series
Key: FLEX-34768
URL: https://issues.apache.org/jira/browse/FLEX-34768
Project: Apache Flex
Issue Type: Bug
Components: Charts
Affects Versions: Apache Flex 4.13.0, Apache Flex 4.12.0, Adobe Flex SDK
4.6 (Release)
Environment: Air running on Windows (XP/Windows7 and Windows 8).
Havent tested running in web browser.
Reporter: Jeff Olajos
Priority: Minor
On Column Charts that display (Live) data, if setStyle("labelPosition","none")
is specified (even though it is the default) on the Bar series, the "Label"
class leaks memory on every series refresh (1 Label per Bar).
To demonstrate, run the following code and examine the "Label" class (need to
remove standard filters). If the setStyle("labelPosition","none") is omitted or
set to "inside" or "outside" the Label class instance count remains constant at
1 Label per bar. If the style is specified as "none", the Label class instance
count increments by 1 Label instance per bar each refresh. In the example
below, there are 2 bars displayed.
Here is a simple mxml example. Run as an Air application. It was tested on 4.6,
12 and 13 and always produces the memory leak:
<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009";
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
creationComplete="application1_creationCompleteHandler(event)">
<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
import mx.events.FlexEvent;
[Bindable]
public var data : ArrayCollection = new
ArrayCollection();
private var mytimer:Timer = new Timer(2000);
protected function
application1_creationCompleteHandler(event:FlexEvent):void
{
mytimer.addEventListener(TimerEvent.TIMER,ontimer);
mytimer.start();
}
protected function ontimer (e:TimerEvent) : void
{
data.removeAll();
var o : Object = new Object();
o.month= "january";
o.expenses = 10;
data.addItem(o);
o = new Object();
o.month= "february";
o.expenses = 10;
data.addItem(o);
}
protected function
mySeries_creationCompleteHandler(event:FlexEvent):void
{
mySeries.labelField = "expenses";
mySeries.xField="month"
mySeries.yField="expenses"
mySeries.setStyle("labelPosition","none");
}
]]>
</fx:Script>
<mx:ColumnChart dataProvider="{data}">
<mx:horizontalAxis>
<mx:CategoryAxis categoryField="month"/>
</mx:horizontalAxis>
<mx:series>
<mx:ColumnSeries id="mySeries"
creationComplete="mySeries_creationCompleteHandler(event)"/>
</mx:series>
</mx:ColumnChart>
</s:WindowedApplication>
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