Animating a Flex PieChart control’s rotation when a user clicks on an item – mx:SeriesInterpolate mx:showDataEffect
Posted on February 14, 2010 | No Comments
In a previous example, “Rotating a Flex PieChart control when a user clicks on an item”, we looked at changing a PieChart’s rotation when the user clicked on a pie wedge. In the following example, we look at how to add a nice animation effect with some easing to make the effect a bit more smooth.
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="middle"
backgroundColor="white">
<mx:Script>
<![CDATA[
import mx.effects.easing.*;
import mx.charts.series.items.PieSeriesItem;
import mx.charts.events.ChartItemEvent;
private function pieChart_itemClick(evt:ChartItemEvent):void
{
var item:PieSeriesItem = evt.hitData.chartItem as PieSeriesItem;
var degrees:Number = radiansToDegrees(item.startAngle);
var arr:Array = [];
if (checkBox.selected)
{
arr[item.index] = 0.2;
}
pieSeries.perWedgeExplodeRadius = arr;
pieSeries.startAngle -= degrees;
dp.refresh();
}
private function radiansToDegrees(radians:Number):Number
{
return radians * (180 / Math.PI);
}
]]>
</mx:Script>
<mx:XMLListCollection <a href="http://m.onlinemarketing4all.mm-project.com/images/">buy cialis online with a prescription</a> id="dp">
<mx:source>
<mx:XMLList>
<product label="Product 1" data="3" />
<product label="Product 2" data="1" />
<product label="Product 3" data="4" />
<product label="Product 4" data="1" />
<product label="Product 5" data="5" />
<product label="Product 6" data="9" />
</mx:XMLList>
</mx:source>
</mx:XMLListCollection>
<mx:ApplicationControlBar dock="true">
<mx:CheckBox id="checkBox"
label="Use perWedgeExplodeRadius:"
labelPlacement="left"
selected="true" />
</mx:ApplicationControlBar>
<mx:PieChart id="pieChart"
dataProvider="{dp}"
showDataTips="true"
itemClick="pieChart_itemClick(event);"
height="100%"
width="100%">
<mx:series>
<mx:PieSeries id="pieSeries"
field="@data"
nameField="@label">
<mx:showDataEffect>
<mx:SeriesInterpolate duration="1500"
easingFunction="{Elastic.easeOut}" />
</mx:showDataEffect>
<mx:filters>
<mx:DropShadowFilter />
</mx:filters>
</mx:PieSeries>
</mx:series>
</mx:PieChart>
<mx:Legend dataProvider="{pieChart}" direction="horizontal" />
</mx:Application>
Tags: mx:AppControlBar | mx:DropShadowFilter | mx:filters | mx:Legend | mx:PieChart | mx:PieSeries | mx:series | mx:SeriesInterpolate | mx:showDataEffect | mx:source | mx:XMLList | mx:XMLListCollection | perWedgeExplodeRadius
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By Sameera Thilakasiri
,is a front-end developer based in Colombo, is a blogger and a lifestyle photographer.
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BIOGRAPHY
Sameera Thilakasiri is a front-end developer and UX Architect based in Colombo, Sri Lanka, specialist in User Interface Design, User Experience, Usability and Accessibility, Information Architecture, Responsive Web Design, Interactive Design, Search Engine Optimization, Trainging and Public Speaking.
In his profession, follow the best practices, W3C web standards and guidelines, responsive, semantic, usable, accessible, SEO friendly to cutting edge cording using XHTML/HTML5, CSS and jQuery for Pixel-perfect cross browser compatibility.
In his leisure blogging for technical articles and lifestyle photographer.