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Behavior of the project

If you move the slider with the mouse, you will see that the behavior is essentially the same as the Flex 3 version of the project, including the displayof a tool tip as shown in Figure 2 and the display of the slider value as shown in Figure 3.

The spark s:Application element

The Flex 4 spark s:Application element differs from the Flex 3 mx:Application element in several ways including the following:

  • Default layout: Unlike the mx:Application element, the s:Application element does not have a default vertical layout. By default, all components placed in the s:application element are placed in the upper-left corner. (The s:VGroup container element was used in Listing 7 to resolve this issue.)
  • Default background color: The default background color of the s:Application element is white, whereas the default background color of the mx:Application element is gray.
  • Horizontal positioning: Unlike the mx:Application element which centers it components horizontally by default, the defaultposition of components placed in the s:Application element is the upper-left corner.

The spark s:VGroup element

As shown in Listing 7, the s:VGroup element can be used to arrange the components in a vertical sequence from top to bottom. However,placing components in an s:VGroup element does not cause them to be centered horizontally. Instead, by default, the components end up on theleft side of the container as shown in Figure 7. If you want the components to be centered, you must write additional code to cause that to happen.

The Flash Builder 4 Components tab

When you create a new Flex project in Flash Builder 4, if you specify the use of the Flex 3 compiler, the Components tab in the resulting IDE will look like Figure 4. However, if you specify the Flex 4 compiler when youcreate the new project, the Components tab will look like Figure 8.

Flex builder 4 components tab exposed.

Missing image.
Flex Builder 4 Components tab exposed.

Numerous differences

If you compare Figure 8 with Figure 4, you will see numerous differences between the two lists. Some of the names are the same and some of the names aredifferent. Even though some of the names are the same, most of the components that you see in Listing 8 are Flex 4 spark components and the components that you see inFigure 4 are Flex 3 mx components and they are represented by different classes in the class library.

However, as you will see later, the Image component in the Flex 4 Component list is actually a Flex 3 mx component. Thatmay also be the case for some of the other components as well.

Same name doesn't guarantee same appearance or same behavior

While the appearance and behavior of a Flex 4 spark component may be the same as the appearance andbehavior of a Flex 3 mx component with the same name, there is no guarantee that will be the case. They are entirely different components and the only way youcan be sure is to study the documentation.

As you saw earlier, the appearance of an mx:HSlider used inside an s:Application element is different from an mx:HSlider used inside an mx:Application element. Therefore, if the appearance and behavior of the components in yourproject are really critical, you should probably avoid mixing Flex 3 and Flex 4 components.

Questions & Answers

can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
Commplementary angles
Idrissa Reply
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
is it 3×y ?
Joan Reply
J, combine like terms 7x-4y
Bridget Reply
im not good at math so would this help me
Rachael Reply
yes
Asali
I'm not good at math so would you help me
Samantha
what is the problem that i will help you to self with?
Asali
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele 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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