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Changing the height of the image

If you grab the thumb with the mouse and move it to the left or the right, two obvious visual effects occur. The first is that the value representedby the current position of the thumb is displayed above the thumb as shown in Figure 3.

(As you will see later, the value is also displayed in a Flex 4 application, but by default the appearance is white numerals on a blackbackground.)

Changing the height of the image.

Missing image.
Changing the height of the image.

The second visual effect

The second visual effect of moving the thumb is that the height of the image changes to the value represented by the position of the thumb on the slider.

(An Image object has a property named maintainAspectRatio . By default, the value of this propertyis true. Therefore, when the height is changed, the width changes in a proportional manner.)

Note that the upper-left corner of the image remains anchored to the same point as the height of the image changes as shown in Figure 3.

Discussion and sample code

The Flex 3 project named SliderChangeEvent 01

Creating the layout

Once you create your new Flex 3 Project, there are at least three ways that you can create your layout using Flex Builder 3:

  1. Select the Design tab in the upper-middle panel of the IDE (see Figure 5) and drag your containers, controls, and other components from the Components tab onto your design window.
  2. Select the Source tab in Figure 5 and write the raw XML code that defines your layout.
  3. A combination of 1 and 2 above

Expose the components tab

When you select the Design tab in the upper-middle window of the IDE, the lower-left window changes to the appearance shown in Figure 4 with theFlex 3 (mx) Components tab exposed.

Flex builder 3 components tab exposed.

Missing image.
Flex Builder 3 Components tab exposed.
The list of available components that you see in Figure 4 also appears when you create a new project in Flash Builder 4 and specify the use ofthe Flex 3 compiler.

A list of available components

Although they aren't all shown in Figure 4 due to space limitations, the Flex Builder 3 Components tab lists all of the components that you can use in your Flex application grouped into the following categories:

  • Custom
  • Controls
  • Layout
  • Navigators
  • Charts

Expose the design window

Selecting the Design tab mentioned above also exposes the Flex Builder 3 designwindow shown in Figure 5.

Drag controls onto the flex builder 3 design tab.

Missing image.
Drag controls onto the Flex Builder 3 Design tab.
A similar design window is exposed when you create a new project in Flash Builder 4 specifying the Flex 3 compiler and then select the Design tab. The purpose is the same but some of the items at the top of the design window in Flash Builder 4 are different.

Drag components onto the Design tab

You can drag components from the Components tab shown in Figure 4 onto the Design tab shown in Figure 5 to create your layout in the Flex Builder 3design mode or in the Flash Builder 4 design mode. As you do that, the corresponding XML code is automatically generated for you.

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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