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Identify the button that dispatched the event

Listing 12 extracts and uses the target property of the incoming MouseEvent object to identify which of the six buttons dispatched the click event that caused the method to be executed.

Call a corresponding method on the Resize object

For each of the first five buttons shown in Figure 4, Listing 12 calls a corresponding method from the above list on the Resize object. (Note that clicking the Start button causes the Start button to be disabled by the code in Listing 12. Note also that none of the buttons call the stop method from the above list.)

Service the Reset button

The sixth button, labeled Reset also calls the end method from the above list to cause the effect to immediately jump to the end. Then itexecutes some additional code to restore the image to its original size and to re-enable the Start button.

Service the creationComplete event dispatched by the Panel

That brings us to the final event handler method and the end of the program. The method shown in Listing 13 is executed when the Panel dispatches a creationComplete event.

Event handler for the creationcomplete event dispatched by the panel.

private function creationCompleteHandler( event:FlexEvent):void{textOut.text += "\nCreation Complete!"; } //end event handler

As you saw in Figure 4, the code in this method causes the text "Creation Complete!" to be displayed in the text area when the Panel and all of its children have been created, initialized, and drawn.

Run the program

I encourage you to run this program from the web. Then copy the code from Listing 14 through Listing 16. Use thatcode to create Flex projects. Compile and run the projects. Experiment with the code, making changes, and observing the results of yourchanges. Make certain that you can explain why your changes behave as they do.

Resources

I will publish a list containing links to ActionScript resources as a separate document. Search for ActionScript Resources in theConnexions search box.

Complete program listings

Complete listings of the programs discussed in this lesson are provided in Listing 14 through Listing 16.

The common mxml code.

<?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"xmlns:cc="CustomClasses.*"><cc:Driver/></mx:Application>

Driver class for activateevent01.

//Illustrates the activate and deactivate events of the // EventDispatcher class. Must run in debug mode to see// the text output. // Click on the browser to cause the Flash player// to gain focus and fire an activate event. // Click on the desktop to cause the Flash player to// lose focus and fire a deactivate event. package CustomClasses{import flash.events.Event; import mx.containers.VBox;import mx.controls.Label;public class Driver extends VBox{ public function Driver(){setStyle("borderStyle","inset"); setStyle("borderColor",0xFF0000);height=100;var label:Label = new Label(); label.text = "Click browser in debug mode"label.setStyle("color",0xFFFF00); addChild(label);addEventListener(Event.ACTIVATE,activateHandler);addEventListener(Event.DEACTIVATE, deActivateHandler);}//end constructorprivate function activateHandler(event:Event):void{trace("\nActivated\ncurrentTarget = " + event.currentTarget+ "\ntarget = " + event.target);}//end activateHandlerprivate function deActivateHandler(event:Event):void{ trace("\nDeactivated\ncurrentTarget = "+ event.currentTarget + "\ntarget = "+ event.target); }//end deActivateHandler}//end class }//end package

Questions & Answers

the diagram of the digestive system
Assiatu Reply
allimentary cannel
Ogenrwot
How does twins formed
William Reply
They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
Oluwatobi
what is genetics
Josephine Reply
Genetics is the study of heredity
Misack
how does twins formed?
Misack
What is manual
Hassan Reply
discuss biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles
Joseph Reply
what is biology
Yousuf Reply
the study of living organisms and their interactions with one another and their environments
AI-Robot
the study of living organisms and their interactions with one another and their environment.
Wine
discuss the biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles in an essay form
Joseph Reply
what is the blood cells
Shaker Reply
list any five characteristics of the blood cells
Shaker
lack electricity and its more savely than electronic microscope because its naturally by using of light
Abdullahi Reply
advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
Abdullahi
cell theory state that every organisms composed of one or more cell,cell is the basic unit of life
Abdullahi
is like gone fail us
DENG
cells is the basic structure and functions of all living things
Ramadan
What is classification
ISCONT Reply
is organisms that are similar into groups called tara
Yamosa
in what situation (s) would be the use of a scanning electron microscope be ideal and why?
Kenna Reply
A scanning electron microscope (SEM) is ideal for situations requiring high-resolution imaging of surfaces. It is commonly used in materials science, biology, and geology to examine the topography and composition of samples at a nanoscale level. SEM is particularly useful for studying fine details,
Hilary
cell is the building block of life.
Condoleezza Reply
what is cell divisoin?
Aron Reply
Diversity of living thing
ISCONT
what is cell division
Aron Reply
Cell division is the process by which a single cell divides into two or more daughter cells. It is a fundamental process in all living organisms and is essential for growth, development, and reproduction. Cell division can occur through either mitosis or meiosis.
AI-Robot
What is life?
Allison Reply
life is defined as any system capable of performing functions such as eating, metabolizing,excreting,breathing,moving,Growing,reproducing,and responding to external stimuli.
Mohamed
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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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