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Run the program

Before continuing, I suggest that you run the program named AppBackground01 to familiarize yourself with the screen output.

The Flex 3 version

The mxml file

An XML listing for the Flex 3 application named AppBackground01 is shown in Listing 2.

Flex 3 application namedappbackground01.

<?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"backgroundColor="#FF0000" backgroundGradientColors="[#00FF00, #0000FF]" backgroundAlpha="1.0"></mx:Application>

Background color, color gradient, and transparency

The output for this application is similar to that shown in Figure 2 except that in this case, the color, color gradient, and transparency for thebackground is being controlled through the use of the following attributes:

  • backgroundColor
  • backgroundGradientColors
  • backgroundAlpha

The code in Listing 2 uses the backgroundColor attribute of the Application element to set the background color of the Flash window to purered using the hexadecimal notation #FF0000.

A few words about color

For those who may not be familiar with this concept, the overall background color is controlled by a mixture of different contributions of the red, green,and blue primary colors. For example, pure red plus pure blue produces a color commonly known as magenta . Pure green plus pure blue produces cyan . Pure red plus pure green produces yellow . Pure red plus pure green plus pure blue produces white . The absence of all three colors produces black.

Three eight-bit bytes

The values for red, green, and blue respectively are specified by the values of three eight-bit bytes. The value of each byte can range from 0 to 255decimal (00 to FF in hexadecimal) . A value of 0 (00 in hexadecimal) means that the primary color is not included in the mixture and a value of 255 (FF in hexadecimal) means that the primary color is included full strength in the mixture.

Using this scheme, it is possible to generate more than sixteen million different colors.

The order of the red, green, and blue contributions to the overall color in hexadecimal notation is RRGGBB, where the letter pairs stand for red, green, andblue respectively.

A color gradient

The Flex 3 application shown in Listing 2 sets the backgroundGradientColors attribute of the Application element to range from pure green (#00FF00) at the top of the Flash window to pure blue (#0000FF) at the bottom. As mentioned earlier, the application sets the backgroundColor to pure red using the hexadecimal notation #FF0000.

As you will see later, the Application element of a Flex 4 application doesn't have an attribute named backgroundGradientColors , so we will have to find another way to create a color gradient in the Flash window for a Flex 4 application.

Alpha

The appearance of the resulting mix of colors can be controlled by changing the value of the backgroundAlpha attribute of the Application element. This attribute can take on values ranging between 0.0 and 1.0. (In other programming systems, alpha is often allowed to vary between 0 and 255 decimal, or between 00 and FF hexadecimal.)

Questions & Answers

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
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
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
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
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Introduction to xml. OpenStax CNX. Dec 02, 2014 Download for free at https://legacy.cnx.org/content/col11207/1.18
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