Adobe FLEX 2 - CREATING AND EXTENDING COMPONENTS Manual page 244

RotationTransInstance(inst).angleTo = angleTo;
}
}
}
In the RotationTransInstance.as class, you modify the
values for the
angleFrom
actions:
Determines whether the user set values for the
1.
If not, determines whether the
2.
initialized with start and end values. If so, the method uses those values to configure the
effect.
If not, sets the
3. angleFrom
property, and 360 for the
angleFrom
The following example shows the RotationTransInstance.as class:
package myEffects
{
// myEffects/RotationTransInstance.as
import mx.effects.effectClasses.TweenEffectInstance;
import mx.effects.Tween;
public class RotationTransInstance extends TweenEffectInstance
{
// Define parameters for the effect.
public var angleFrom:Number;
public var angleTo:Number;
public function RotationTransInstance(targetObj:Object) {
super(targetObj);
}
// Override play() method class.
override public function play():void {
// All classes must call super.play().
super.play();
// Check whether angleFrom is set.
if (isNaN(angleFrom))
{
// If not, look in propertyChanges.start for a value.
// Otherwise, set it to 0.
angleFrom = (propertyChanges.start["rotation"] != undefined) ?
}
244 Creating Effects
and properties. This method performs the following
angleTo
Effectinstance.propertyChanges
and properties to the default values of 0 for the
angleTo
angleTo
propertyChanges.start["rotation"] : 0;
method to calculate the default
play()
and
angleFrom angleTo
property.
properties.
property was