Packagemx.states
Classpublic class Transition
InheritanceTransition Inheritance Object

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

The Transition class defines a set of effects that play in response to a change of view state. While a view state definition defines how to change states, a transition defines the order in which visual changes occur during the state change.

To define a transition, you set the transitions property of an Application to an Array of Transition objects.

You use the toState and fromState properties of the Transition class to specify the state changes that trigger the transition. By default, both the fromState and toState properties are set to "*", meaning apply the transition to any changes to the view state.

You can use the fromState property to explicitly specify a view state that your are changing from, and the toState property to explicitly specify a view state that you are changing to. If a state change matches two transitions, the toState property takes precedence over the fromState property. If more than one transition match, Flex uses the first definition in the transition array.

You use the effect property to specify the Effect object to play when you apply the transition. Typically, this is a composite effect object, such as the Parallel or Sequence effect, that contains multiple effects, as the following example shows:

   <mx:Transition id="myTransition" fromState="*" toState="*">
    <mx:Parallel>
        ...
    </mx:Parallel>
  </mx:Transition>
  

MXML SyntaxexpandedHide MXML Syntax

The <mx:Transition> tag defines the following attributes:

  <mx:Transition
    Properties
    id="ID"
    effect=""
    fromState="*"
    toState="*"
    autoReverse="false"
  />
  

Default MXML Propertyeffect

See also

mx.effects.AddChildAction
mx.effects.RemoveChildAction
mx.effects.SetPropertyAction
mx.effects.SetStyleAction


Public Properties
 PropertyDefined By
  autoReverse : Boolean = false
Set to true to specify that this transition applies to both the forward and reverse view state changes.
Transition
  effect : IEffect
The IEffect object to play when you apply the transition.
Transition
  fromState : String = *
A String specifying the view state that your are changing from when you apply the transition.
Transition
  interruptionBehavior : String = end
Flex does not support the playing of multiple transitions simultaneously.
Transition
  toState : String = *
A String specifying the view state that you are changing to when you apply the transition.
Transition
Public Methods
 MethodDefined By
  
Constructor.
Transition
Property Detail
autoReverseproperty
public var autoReverse:Boolean = false

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Set to true to specify that this transition applies to both the forward and reverse view state changes. Therefore, use this transition on a change from view state A to view state B, and on the change from B to A.

While the transition from view state A to view state B is playing, the reverse transition can occur to interrupt the current transition. The reverse transition always halts the current transition at its current location. That is, the reverse transition always plays as if the interruptionBehavior property was set to stop, regardless of the real value of interruptionBehavior.

This property is only checked when the new transition is going in the exact opposite direction of the currently playing one. That is, if a transition is playing between states A and B and then a transition to return to A is started.

If a transition uses the toState and fromState properties to explicitly handle the transition from view state B to A, then Flex ignores the autoReverse property.

The default value is false.

See also

effectproperty 
public var effect:IEffect

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

The IEffect object to play when you apply the transition. Typically, this is a composite effect object, such as the Parallel or Sequence effect, that contains multiple effects.

The effect property is the default property of the Transition class. You can omit the <mx:effect> tag if you use MXML tag syntax.

fromStateproperty 
public var fromState:String = *

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

A String specifying the view state that your are changing from when you apply the transition. The default value is "*", meaning any view state.

You can set this property to an empty string, "", which corresponds to the base view state.

The default value is "*".

interruptionBehaviorproperty 
public var interruptionBehavior:String = end

Language Version : ActionScript 3.0
Product Version : Flex 4.5
Runtime Versions : Flash Player 10.2, AIR 2.5

Flex does not support the playing of multiple transitions simultaneously. If a transition is currently playing when a new transition occurs, the current transition is interrupted. This property controls how the current transition behaves when interrupted.

By default, the current transition ends, which snaps all effects in the transition to their end values. This corresponds to a property value of end. If the value of this property is stop, the current transition halts at its current location. The new transition start playing from the halt location of the previous transition.

The value of stop can smooth out the appearance of an interrupted transition. That is because the user does not see the current transition snap to its end state before the new transition begins.

In some cases, the interrupting transition can be the reverse of the current transition. For example, while the transition from view state A to view state B is playing, the reverse transition occurs to interrupt the current transition. If you set the autoReverse property of a transition instance to true, you can use the same transition to handle both the forward and reverse transitions. When the interrupting transition is the reverse transition of the current transition and has autoReverse set to true, the interrupting transition runs as if the interruptionBehavior property was set to stop, regardless of the real value of interruptionBehavior.

The mx.states.InterruptionBehavior class defines the possible values for this property.

The default value is end.

See also

toStateproperty 
public var toState:String = *

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

A String specifying the view state that you are changing to when you apply the transition. The default value is "*", meaning any view state.

You can set this property to an empty string, "", which corresponds to the base view state.

The default value is "*".

Constructor Detail
Transition()Constructor
public function Transition()

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Constructor.