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The folks who defined the Button class have already designed the desired characteristics into the Button class and its superclasses. We can use inheritance to take advantage of the existing characteristics and toadd new characteristics by defining unique subclasses of the Button class.

Three new button classes

The program named Skins01 that I will explain in this lesson defines three new button classes named ButterflyButton , FrogButton , and FancyButton . Each of these classes extends the Button class and inherits all of the characteristics of a standard Button object. However, the visual elements of the standard button are modified in thesubclasses through the use of the ActionScript skinning capability.

What is skinning?

According to About skinning ,

"Skinning is the process of changing the appearance of a component by modifying or replacing its visual elements. These elements can be made up ofbitmap images, SWF files, or class files that contain drawing methods that define vector images.

Skins can define the entire appearance, or only a part of the appearance, of a component in various states. For example, a Button controlhas eight possible states, and eight associated skin properties."

Will extend the Button class

In this lesson, I will extend the Button class into three new classes and will modify four of the eight skin properties for objects instantiated fromthe three new classes. I will also define a fourth class named Driver that is designed to exercise and show how to use the new buttons.

Images used as skins for the buttons

Figure 1 shows the images used to define new skins for the three buttons.

Images used as skins for the buttons.

Missing image
Images used as skins for the buttons.

The button class named ButterflyButton was skinned with the four butterfly images in the top row. The button class named FrogButton was skinned with the four frog images in the bottom row. The button classnamed FancyButton was skinned with both butterfly images and frog images and was given the ability to toggle back and forth between butterflies and frogs.

The toggleSkin method

The FancyButton class exposes a public method named toggleSkin . The rightmost button in Figure 2 is an object of the FancyButton class. Whenever this button is clicked, a click event handler registered on the button calls the toggleSkin method. Each time this method is called, the button's skins toggle from butterfly tofrog or vice versa. (See the rightmost button in Figure 5.) This illustrates the capability to change skins on an ActionScript component atruntime.

Spacebar -- Even though this text concentrates on the manipulation of the buttons with the mouse, a button can also be manipulated with thespace bar when it has the focus. Note, however, that this lesson doesn't address the topic of focus.

Skins versus button styles

The different skins on the buttons are exposed by associating the images in Figure 1 with various button styles.

The upSkin style

The two images in the first column in Figure 1 show what the buttons look like when the mouse is not hovering over or pointing at the button. Thiscorresponds to the button style named "upSkin" ,

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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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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