Package | spark.accessibility |
Class | public class VideoPlayerAccImpl |
Inheritance | VideoPlayerAccImpl AccImpl AccessibilityImplementation Object |
Language Version: | ActionScript 3.0 |
Product Version: | Flex 4 |
Runtime Versions: | Flash Player 10, AIR 2.0 |
When a Spark VideoPlayer is created,
its accessibilityImplementation
property
is set to an instance of this class.
The Flash Player then uses this class to allow MSAA clients
such as screen readers to see and manipulate the VideoPlayer.
See the mx.accessibility.AccImpl and
flash.accessibility.AccessibilityImplementation classes
for background information about accessibility implementation
classes and MSAA.
Children
The VideoPlayer has six MSAA children:
- Play/Pause control
- Scrub control
- Play time indicator
- Mute control
- Volume control
- Full Screen control
The controls will always appear in the same order for accessibility regardless of the order of controls in the skin.
Role
The MSAA Role of a VideoPlayer is ROLE_SYSTEM_PANE.
The Role of each child control is:
- Play/Pause control: ROLE_SYSTEM_BUTTON
- Scrub control: ROLE_SYSTEM_SLIDER
- Play time indicator: ROLE_SYSTEM_STATICTEXT
- Mute control: ROLE_SYSTEM_BUTTON
- Volume control: ROLE_SYSTEM_SLIDER
- Full Screen control: ROLE_SYSTEM_BUTTON
Name
The MSAA Name of a VideoPlayer is, by default,
specified by a locale-dependent resource.
For the en_US locale, the name is "VideoPlayer".
When wrapped in a FormItem element,
this name is combined with the FormItem's label.
To override this behavior,
set the VideoPlayer's's accessibilityName
property.
The Name of each child control is similarly specified by a resource. The en_US names are:
- Play/Pause control: "Play" or "Pause"
- Scrub control: "Scrub Bar"
- Play time indicator: the displayed text
- Mute control: "Muted" or "Not muted"
- Volume control: "Volume Bar"
- Full Screen control: "Full Screen"
To override the names of these child controls, reskin the VideoPlayer
and set the accessibilityName
of the controls.
Note that the Play/Pause control and the Mute control
have MSAA Names which change as you interact with them.
To specify them, set accessibilityName
to a comma-separated list of MSAA Names,
such as "Play,Pause" or "Not Muted,Muted".
When the Name of the VideoPlayer or one of its child controls changes, a VideoPlayer dispatches the MSAA event EVENT_OBJECT_NAMECHANGE with the proper childID for the control or 0 for itself.
Description
The MSAA Description of a VideoPlayer is, by default, the empty string,
but you can set the VideoPlayer's accessibilityDescription
property.
The Description of each child control is the empty string.
State
The MSAA State of a VideoPlayer is STATE_SYSTEM_NORMAL.
The State of each child control is:
- Play/Pause control:
- STATE_SYSTEM_UNAVAILABLE
- STATE_SYSTEM_FOCUSABLE
- STATE_SYSTEM_FOCUSED
- Scrub control:
- STATE_SYSTEM_UNAVAILABLE
- STATE_SYSTEM_FOCUSABLE
- STATE_SYSTEM_FOCUSED
- Play time indicator:
- STATE_SYSTEM_UNAVAILABLE
- STATE_SYSTEM_READONLY
- Mute control:
- STATE_SYSTEM_UNAVAILABLE
- STATE_SYSTEM_FOCUSABLE
- STATE_SYSTEM_FOCUSED
- Volume control:
- STATE_SYSTEM_UNAVAILABLE
- STATE_SYSTEM_FOCUSABLE
- STATE_SYSTEM_FOCUSED
- Full Screen control:
- STATE_SYSTEM_UNAVAILABLE
- STATE_SYSTEM_FOCUSABLE
- STATE_SYSTEM_FOCUSED
When the State of the VideoPlayer or one of its child controls changes, a VideoPlayer dispatches the MSAA event EVENT_OBJECT_STATECHANGE with the proper childID for the control or 0 for itself.
Value
A VideoPlayer does not have an MSAA Value.
THe Value of each child control is:
- Play/Pause control: no Value
- Scrub control: Value of slider as an amount of time
- Play time indicator: no Value
- Mute control: no Value
- Volume control: Value of slider
- Full Screen control: no Value
When the Value of a child control changes, a VideoPlayer dispatches the MSAA event EVENT_OBJECT_VALUECHANGE with the proper childID for the control.
Location
The MSAA Location of a VideoPlayer, or one of its child controls, is its bounding rectangle.
Default Action
A VideoPlayer does not have an MSAA DefaultAction.
The DefaultAction of each child control is:
- Play/Pause control: "Press"
- Scrub control: none
- Play time indicator: none
- Mute control: "Press"
- Volume control: none
- Full Screen control: "Press"
Performing the default action of one of the child controls will have the following effect:
- Play/Pause control: toggle between Play and Pause
- Scrub control: none
- Play time indicator: none
- Mute control: toggle between Mute and Not Muted
- Volume control: none
- Full Screen control: toogle Full Screen on and off
Focus
A VideoPlayer accepts focus. When it does so, it dispatches the MSAA event EVENT_OBJECT_FOCUS event.
Some of its child controls also accept focus:
- Play/Pause control: accepts focus
- Scrub control: accepts focus
- Play time indicator: does not accept focus
- Mute control: transfers focus to Volume Bar
- Volume control: accepts focus
- Full Screen control: accepts focus
When reporting focus, the VideoPlayer reports itself if it is focused and none of its child controls is focused. Otherwise, the focus may be reported as being on the Play/Pause control, the Scrub control, the Volume control, or the Full Screen control.
Selection
A VideoPlayer does not support selection in the MSAA sense.
Method | Defined By | ||
---|---|---|---|
VideoPlayerAccImpl(master:UIComponent)
Constructor. | VideoPlayerAccImpl | ||
An IAccessible method that performs the default action associated with the component
that this AccessibilityImplementation represents or of one of its child elements. | AccessibilityImplementation | ||
MSAA method for returning a DisplayObject or Rectangle
specifying the bounding box of a child element in the AccessibilityImplementation. | AccessibilityImplementation | ||
IAccessible method for altering the selection in the component
that this AccessibilityImplementation represents. | AccessibilityImplementation | ||
[static]
Enables accessibility in the VideoPlayer class. | VideoPlayerAccImpl | ||
MSAA method for returning the default action of the component
that this AccessibilityImplementation represents or of one of its child elements. | AccessibilityImplementation | ||
MSAA method for returning the unsigned integer ID of the child element, if any,
that has child focus within the component. | AccessibilityImplementation | ||
MSAA method for returning the name for the component
that this AccessibilityImplementation represents or for one of its child elements. | AccessibilityImplementation | ||
MSAA method for returning the system role for the component
that this AccessibilityImplementation represents or for one of its child elements. | AccessibilityImplementation | ||
MSAA method for returning an array containing the IDs of all child elements that are selected. | AccessibilityImplementation | ||
IAccessible method for returning the current runtime state of the component that this
AccessibilityImplementation represents or of one of its child elements. | AccessibilityImplementation | ||
MSAA method for returning the runtime value of the component that this
AccessibilityImplementation represents or of one of its child elements. | AccessibilityImplementation | ||
Returns an array containing the unsigned integer IDs of all child elements
in the AccessibilityImplementation. | AccessibilityImplementation | ||
[static]
Method for supporting Form Accessibility. | AccImpl | ||
Indicates whether an object has a specified property defined. | Object | ||
[static]
Method for supporting state Accessibility. | AccImpl | ||
Indicates whether an instance of the Object class is in the prototype chain of the object specified
as the parameter. | Object | ||
Indicates whether the specified property exists and is enumerable. | Object | ||
Sets the availability of a dynamic property for loop operations. | Object | ||
Returns the string representation of this object, formatted according to locale-specific conventions. | Object | ||
Returns the string representation of the specified object. | Object | ||
Returns the primitive value of the specified object. | Object |
VideoPlayerAccImpl | () | Constructor |
public function VideoPlayerAccImpl(master:UIComponent)
Language Version: | ActionScript 3.0 |
Product Version: | Flex 4 |
Runtime Versions: | Flash Player 10, AIR 2.0 |
Constructor.
Parametersmaster:UIComponent — The UIComponent instance that this AccImpl instance
is making accessible.
|
enableAccessibility | () | method |
public static function enableAccessibility():void
Language Version: | ActionScript 3.0 |
Product Version: | Flex 4 |
Runtime Versions: | Flash Player 10, AIR 2.0 |
Enables accessibility in the VideoPlayer class.
This method is called by application startup code
that is autogenerated by the MXML compiler.
Afterwards, when instances of VideoPlayer are initialized,
their accessibilityImplementation
property
will be set to an instance of this class.
Fri Mar 19 2010, 02:45 AM -07:00