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The initInstance method receives a reference to the instance object as the interface type IEffectInstance . The objective is to write values into the properties belonging to the instance object. However,the IEffectInstance interface doesn't know anything about properties having those names. Therefore, it is necessary to cast the instanceobject's reference to the type of the instance object before making each assignment. One such cast operation is shown by the statement that begins with CustomEffectInstance(instance) in Listing 4.

Call the initInstance method of the superclass

Also note that you must call the initInstance method of the superclass in your overridden method as shown in Listing 4.

This method provides the mechanism by which required property values make it all the way from the driver class to the instance class.

Override the getAffectedProperties method

According to About creating a custom effect , you must override the inherited method named getAffectedProperties in such a way as to return an array of strings. Each string is the name of a property of the target object that ischanged by the effect. If no properties are changed, you must return an empty array.

Listing 5 shows my overridden version of the getAffectedProperties method.

Override the getaffectedproperties method.

override public function getAffectedProperties():Array{return ["rotation","rotationX","rotationY","x","y"];} //end getAffectedProperties //--------------------------------------------------//} //end class } //end package

This is a little difficult

It is a little difficult to know exactly which properties belonging to the target component will be modified by the effect, particularly when the customeffect is a composite of existing effects. Also, I don't know whether a change must be permanent or whether a temporary change in the value of a propertyrequires that it be returned by the getAffectedProperties method. There are several target property values that are temporarily changed bythis custom effect.

In this program, the target component is a Button object but it could be any component. I went through the list of properties belonging to abutton and came up with the five shown in Listing 5 as those most likely to be modified.

The end of the CustomEffect class

Listing 5 also signals the end of the class named CustomEffect . In addition to the methods that were overridden above, the following two inherited methods may optionally be overridden as well:

  • effectStartHandler - called when the effect instance starts playing.
  • effectEndHandler - called when the effect instance finishes playing.

As the names and descriptions of these two methods suggest, they can be overridden to provide any special behavior that you need when the effect startsand finishes playing.

The class named CustomEffectInstance

The class named CustomEffectInstance begins in Listing 6. A complete listing of the class is provided in Listing 20 near the end of thelesson.

Beginning of the customeffectinstance class.

package CustomClasses{ import mx.effects.EffectInstance;import mx.effects.Glow; import mx.effects.Parallel;import mx.effects.Rotate; import mx.effects.WipeRight;import mx.events.FlexEvent;public class CustomEffectInstance extends EffectInstance{//Instantiate the individual effects that will be // combined in parallel to produce the custom effect.private var wipeEffect:WipeRight = new WipeRight(); private var rotateEffect:Rotate = new Rotate();private var glowEffect:Glow = new Glow();

Questions & Answers

A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
Aislinn Reply
cm
tijani
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John Reply
what is physics
Siyaka Reply
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Jude Reply
Can you compute that for me. Ty
Jude
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David Reply
what is viscosity?
David
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emma Reply
what is chemistry
Youesf Reply
what is inorganic
emma
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
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Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
Krampah Reply
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
Sahid Reply
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
Samuel Reply
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Joseph Reply
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
Ryan
what's motion
Maurice Reply
what are the types of wave
Maurice
answer
Magreth
progressive wave
Magreth
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fine, how about you?
Mohammed
hi
Mujahid
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
yasuo Reply
Who can show me the full solution in this problem?
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Source:  OpenStax, Object-oriented programming (oop) with actionscript. OpenStax CNX. Jun 04, 2010 Download for free at http://cnx.org/content/col11202/1.19
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