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State

Package | mx.states
Class | public class State
Inheritance | State flash.events.EventDispatcher

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The State class defines a view state, a particular view of a component. For example, a product thumbnail could have two view states; a base view state with minimal information, and a rich view state with additional information. The `overrides` property specifies a set of child classes to add or remove from the base view state, and properties, styles, and event handlers to set when the view state is in effect.

You use the State class in the `states` property of Flex components. You can only specify a `states` property at the root of an application or a custom control, not on child controls.

You enable a view state by setting a component's `currentState` property.

MXML Syntax Show MXML Syntax
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The `<mx:State>` tag has the following attributes:

      <mx:State
      Properties
      basedOn="null"
      name="null"
      overrides="null"
      />

Default MXML Property `overrides`

See also

mx.states.AddChild
mx.states.RemoveChild
mx.states.SetEventHandler
mx.states.SetProperty
mx.states.SetStyle
mx.states.Transition

Public Properties

| Property | Defined By
--- | --- | ---
|  | basedOn : String The name of the view state upon which this view state is based, or null if this view state is not based on a named view state. | State
|  | name : String The name of the view state. | State
|  | overrides : Array The overrides for this view state, as an Array of objects that implement the IOverride interface. | State
|  | stateGroups : Array The state groups that this view state belongs to as an array of String. | State

Public Methods

| Method | Defined By
--- | --- | ---
|  | State(properties:Object = null) Constructor. | State

Events

| Event | Summary | Defined By
--- | --- | --- | ---
|  | enterState | Dispatched after a view state has been entered. | State
|  | exitState | Dispatched just before a view state is exited. | State

Property Detail

basedOn | property

`public var basedOn:String`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The name of the view state upon which this view state is based, or `null` if this view state is not based on a named view state. If this value is `null`, the view state is based on a root state that consists of the properties, styles, event handlers, and children that you define for a component without using a State class.

The default value is `null`.

name | property |

`public var name:String`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The name of the view state. State names must be unique for a given component. This property must be set.

overrides | property |

`public var overrides:Array`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The overrides for this view state, as an Array of objects that implement the IOverride interface. These overrides are applied in order when the state is entered, and removed in reverse order when the state is exited.

The following Flex classes implement the IOverride interface and let you define the view state characteristics:

- AddChild
- RemoveChild
- SetEventHandler
- SetProperty
- SetStyle

The `overrides` property is the default property of the State class. You can omit the `<mx:overrides>` tag and its child `<mx:Array>`tag if you use MXML tag syntax to define the overrides.

stateGroups | property |

`public var stateGroups:Array`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The state groups that this view state belongs to as an array of String.

Constructor Detail

State | () | Constructor

`public function State(properties:Object = null)`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Constructor.

Parameters

| `properties:Object` (default = `null`)`` — Object containing property settings for this State.

Event Detail

enterState | Event

Event Object Type: `mx.events.FlexEvent`
FlexEvent.type property = `mx.events.FlexEvent.ENTER_STATE`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Dispatched after a view state has been entered.

The `FlexEvent.ENTER_STATE` constant defines the value of the `type` property of the event object for a `enterState` event.

This event will only be dispatched when there are one or more relevant listeners attached to the dispatching object.

The properties of the event object have the following values:

Property | Value
--- | ---
`bubbles` | false
`cancelable` | false
`currentTarget` | The Object that defines the event listener that handles the event. For example, if you use `myButton.addEventListener()` to register an event listener, myButton is the value of the `currentTarget`.
`target` | The Object that dispatched the event; it is not always the Object listening for the event. Use the `currentTarget` property to always access the Object listening for the event.

exitState | Event |

Event Object Type: `mx.events.FlexEvent`
FlexEvent.type property = `mx.events.FlexEvent.EXIT_STATE`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Dispatched just before a view state is exited. This event is dispatched before the changes to the default view state have been removed.

The `FlexEvent.EXIT_STATE` constant defines the value of the `type` property of the event object for a `exitState` event.

This event will only be dispatched when there are one or more relevant listeners attached to the dispatching object.

The properties of the event object have the following values:

Property | Value
--- | ---
`bubbles` | false
`cancelable` | false
`currentTarget` | The Object that defines the event listener that handles the event. For example, if you use `myButton.addEventListener()` to register an event listener, myButton is the value of the `currentTarget`.
`target` | The Object that dispatched the event; it is not always the Object listening for the event. Use the `currentTarget` property to always access the Object listening for the event.

Wed Nov 15 2017, 09:50 AM +01:00