| Package | spark.accessibility |
| Class | public class PanelAccImpl |
| Inheritance | PanelAccImpl  AccImpl flash.accessibility.AccessibilityImplementation |
| Subclasses | TitleWindowAccImpl |
| Language Version : | ActionScript 3.0 |
| Product Version : | Flex 4 |
| Runtime Versions : | Flash Player 10, AIR 1.5 |
When a Spark Panel is created,
the accessibilityImplementation property
of a special child Sprite 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 Panel.
See the mx.accessibility.AccImpl and
flash.accessibility.AccessibilityImplementation classes
for background information about accessibility implementation
classes and MSAA.
Children
A Panel has no MSAA children. All children of the actual Panel are siblings of the Panel in the FlashPlayer's MSAA tree, because Flash Player does not support objects with accessibility implementations having children with their own accessibility implementations.
The PanelAccImpl is set as the accessibilityImplementation
of the titleDisplay object because setting it on the Panel
itself would not allow the Panel's children to be exposed in MSAA.
Because of this an invisible rectangle is drawn in the
titleDisplay making it the same size as the Panel as a whole
so that the MSAA Location is the bounding rectangle of the entire Panel.
Screen readers like JAWS rely on the MSAA Location to announce whether
some component is in the grouping since the MSAA structure is flat.
Role
The MSAA Role of a Panel is ROLE_SYSTEM_GROUPING.
Name
The MSAA Name of a Panel is, by default, the title that it displays.
To override this behavior, set the Panel's accessibilityName
property.
When the Name changes, a Panel dispatches the MSAA event EVENT_OBJECT_NAMECHANGE.
Description
The MSAA Description of a Panel is, by default, the empty string,
but you can set the Panel's accessibilityDescription
property.
State
The MSAA State of a Panel is always STATE_SYSTEM_NORMAL, indicating that no state flags are set.
Since the state does not change, a Panel does not dispatch the MSAA event EVENT_OBJECT_STATECHANGE.
Value
The MSAA Value of a Panel is always the empty string.
Location
The MSAA Location of a Panel is its bounding rectangle.
Default Action
A Panel does not have an MSAA DefaultAction .
Focus
A Panel does not accept focus.
Selection
A Panel does not support selection in the MSAA sense.
| Method | Defined By | ||
|---|---|---|---|
PanelAccImpl(master:UIComponent)
Constructor. | PanelAccImpl | ||
enableAccessibility():void [static]
Enables accessibility in the Panel class. | PanelAccImpl | ||
 | getFormName(component:UIComponent):String [static]
Method for supporting Form Accessibility. | AccImpl | |
| isAncestorDisabled(component:UIComponent):Boolean [static]
Returns true if an ancestor of the component has enabled set to false. | AccImpl | |
| PanelAccImpl | () | Constructor |
Hide Inherited Protected Properties
Show Inherited Protected Propertiespublic function PanelAccImpl(master:UIComponent)| Language Version : | ActionScript 3.0 |
| Product Version : | Flex 4 |
| Runtime Versions : | Flash Player 10, AIR 1.5 |
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 1.5 |
Enables accessibility in the Panel class.
This method is called by application startup code
that is autogenerated by the MXML compiler.
Afterwards, when instances of Panel are initialized,
the accessibilityImplementation property
of a special first child Sprite will be set to an instance
of this class.
If the PanelAccImpl were attached to the Panel itself
the accessibility implementations of the Panel's children
would be ignored.