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For example, Figure 5 shows the results of dragging two Label controls, one HSlider control, and one Image control from the Components tab of Figure 4 to the Design tab of Figure 5. (No attempt has been made to set property values on any of the controls shown in Figure 5.) .

XML code before setting properties

If you select the Source tab at this point, you will see the XML code shown in Listing 1.

Xml code before setting properties for sliderchangeevent01.

<?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"><mx:Label text="Label"/><mx:Label text="Label"/><mx:HSlider/><mx:Image/></mx:Application>

Compile and run

As you can see, the XML code in Listing 1 is pretty sparse. You could compile and run the application at this point. All you would see would betwo labels each containing the text Label and a slider covering the default numeric range from 0 to 10.

Put some meat on the bones

We will need to put some meat on the bones of this skeleton mxml code in order to create our Flex application. We can accomplish that by settingattribute values that correspond to properties of the controls.

Setting attribute values

Once again, we have three choices:

  1. Go hardcore and edit the XML code shown in Listing 1 to add the necessary attributes.
  2. Stay in Design mode, select each component in the Design tab, and use the Flex Properties tab shown in Figure 6 to set the properties on that component.
  3. A combination of 1 and 2 above.

The flex builder 3 properties tab exposed.

Missing tab.
The Flex Builder 3 Properties tab exposed.

The Flex Properties tab

When you select the Design tab shown in Figure 5, the Flex Properties tab shown in Figure 6 appears in the bottom-right of the IDE.

The appearance of the Flex Properties tab depends on which component is selected in the Design tab. Figure 5 shows one of the Label controls selected, and Figure 6 shows the Flex Properties tab corresponding to a Label control.

You will see a very similar properties tab if you create a new Flash Builder 4 project and specify use of the Flex 3 compiler. Some of theitems are in different locations than Figure 6 but it appears that the Flash Builder 4 properties tab has the same items for a Flex 3 project.

A variety of user input controls

The Flex Properties tab contains a variety of user input controls that allow you to specify values for many of the commonly used properties that areallowed for the selected component.

Note, however, that the documentation for the Label control lists many properties that are not supported by the Flex Properties tab shown in Figure 6. You can increase the number of properties shown in the tab byselecting one of the controls at the top of the tab that converts the display into an alphabetical list of properties. However, even this doesn't seemto show all of the properties defined by and inherited by some components.

If you need to set properties that are not supported by the Flex Properties tab, you probably have no choice but to select the Source tab shown in Figure 5 and write mxml code for those properties.

Questions & Answers

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
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
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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