MACROMEDIA COLDFUSION MX 7.0.2-USING COLDFUSION MX WITH FLEX 2 Guida Utente Scaricare il pdf (Pagina 171)

Create a transition 171

Create a transition

When you change the view states in your application, the check boxes immediately appear on

the screen. You can define a Flex transition that uses the WipeDown and Dissolve effects,

which make the check boxes appear gradually rather than immediately.

1. In Source mode, create a Transition object and specify the change in state that triggers it

by adding the following

<mx:transitions> tag immediately after the closing

<mx:states> tag:

<mx:transitions>

<mx:Transition id="myTransition" fromState="*" toState="Advanced">

</mx:Transition>

</mx:transitions>

The code defines one Transition object called myTransition. (You can define more than

one transition in the

<mx:transitions> tag.)

The code also specifies that the transition will be performed when the application changes

from any view state (

fromState="*") to the Advanced view state

(

toState="Advanced"). The value "*" is a wildcard character specifying any view state.

2. Specify the targeted component for the transition, and how you want the effects to play—

simultaneously or sequentially—by entering the following

<mx:Parallel> tag (in bold)

between the

<mx:Transition> tags:

<mx:Transition id="myTransition" fromState="*" toState="Advanced">

<mx:Parallel target="{myVBox}">

</mx:Parallel>

</mx:Transition>

The targeted component for the transition is the VBox container named myVBox.

Because you want two effects to play simultaneously during the transition, you use the

<mx:Parallel> tag. If you wanted the effects to play sequentially, you would use the

<mx:Sequence> tag instead. In that case, the second effect would not start until the first

effect finished playing.

3. Specify the effects to play during the transition by entering the following <mx:WipeDown>

and

<mx:Dissolve> tags (in bold) between the <mx:Parallel> tags:

<mx:Parallel target="{myVBox}">

<mx:WipeDown duration="2000"/>

<mx:Dissolve alphaFrom="0.0" alphaTo="1.0" duration="2000"/>

</mx:Parallel>

You want to play two effects, a WipeDown effect that causes the targeted container to

appear from top to bottom over a period of 2000 milliseconds, or 2 seconds, and a reverse

Dissolve effect that causes the contents of the container to gradually come into focus in 2

seconds.

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MACROMEDIA COLDFUSION MX 7.0.2-USING COLDFUSION MX WITH FLEX 2 Guida Utente Pagina 171

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