| 套件 | spark.accessibility |
| 類別 | public class ButtonBarBaseAccImpl |
| 繼承 | ButtonBarBaseAccImpl  ListBaseAccImpl AccImpl AccessibilityImplementation Object |
| 子類別 | TabBarAccImpl |
| 語言版本: | ActionScript 3.0 |
| 產品版本: | Flex 4 |
| 執行階段版本: | Flash Player 10, AIR 1.5 |
Although TabBar has its own accessibility implementation subclass, ButtonBar simply uses the one for ButtonBarBase. Therefore, the rest of this description refers to the commonly-used ButtonBar component rather than the ButtonBarBase base class.
When a Spark ButtonBar 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 ButtonBar.
See the mx.accessibility.AccImpl and
flash.accessibility.AccessibilityImplementation classes
for background information about accessibility implementation
classes and MSAA.
Children
The MSAA children of a ButtonBar are its buttons.
As described below, the accessibility of these Buttons
is managed by the ButtonBar;
their own accessibilityImplementation
and accessibilityProperties are ignored
by the Flash Player.
Role
The MSAA Role of a ButtonBar is ROLE_SYSTEM_TOOLBAR.
The Role of each Button in the ButtonBar is ROLE_SYSTEM_PUSHBUTTON.
Name
The MSAA Name of a ButtonBar is, by default, an empty string.
When wrapped in a FormItem element, the Name is the FormItem's label.
To override this behavior,
set the ButtonBar's accessibilityName property.
The Name of each Button is determined by the ButtonBar's
itemToLabel() method.
When the Name of the ButtonBar or one of its Buttons changes, a ButtonBar dispatches the MSAA event EVENT_OBJECT_NAMECHANGE with the proper childID for the Button or 0 for itself.
Description
The MSAA Description of a ButtonBar is, by default, an empty string,
but you can set the ButtonBar's accessibilityDescription
property.
The Description of each Button is the empty string.
State
The MSAA State of a ButtonBar is a combination of:
- STATE_SYSTEM_UNAVAILABLE (when enabled is false)
- STATE_SYSTEM_FOCUSABLE (when enabled is true)
- STATE_SYSTEM_FOCUSED (when enabled is true and the ButtonBar has focus)
The State of a Button in a ButtonBar is a combination of:
- STATE_SYSTEM_FOCUSED (when it has focus)
- STATE_SYSTEM_PRESSED (when it is selected)
When the State of the ButtonBar or one of its Buttons changes, a ButtonBar dispatches the MSAA event EVENT_OBJECT_STATECHANGE with the proper childID for the Button or 0 for itself.
Value
A ButtonBar, or a Button in a ButtonBar, does not have an MSAA Value.
Location
The MSAA Location of a ButtonBar, or a Button in a ButtonBar, is its bounding rectangle.
Default Action
A ButtonBar does not have an MSAA DefaultAction.
The DefaultAction for a Button in a ButtonBar is "Press".
Focus
Both the ButtonBar and its individual buttons accept focus. When they do so it dispatches the MSAA event EVENT_OBJECT_FOCUS. A button is not automatically selected when focused through arrow key navigation. To select a focused button, the user must press the spacebar.
Selection
MSAA Selection will press the button corresponding to the specified childID. Only one button can be pressed at a time.
隱藏繼承公用屬性
顯示繼承公用屬性| 方法 | 定義自 | ||
|---|---|---|---|
ButtonBarBaseAccImpl(master:UIComponent)
Constructor. | ButtonBarBaseAccImpl | ||
 |
IAccessible 方法會執行與組件關聯的預設動作，而該組件是由此 AccessibilityImplementation 或其子元素之一所代表。 | AccessibilityImplementation | |
|
MSAA 方法適用於傳回 DisplayObject 或 Rectangle，以便在 AccessibilityImplementation 中指定子系元素的範圍框。 | AccessibilityImplementation | |
|
用於改變組件中之選擇的 IAccessible 方法，該組件是由此 AccessibilityImplementation 所代表。 | AccessibilityImplementation | |
[靜態]
Enables accessibility in the ButtonBarBase class. | ButtonBarBaseAccImpl | ||
|
傳回組件預設動作的 MSAA 方法，該組件是由此 AccessibilityImplementation 或其子元素之一所代表。 | AccessibilityImplementation | |
|
傳回子元素 (如果有的話) 無正負號整數 ID 的 MSAA 方法，該子元素在組件中具有子元素焦點。 | AccessibilityImplementation | |
|
傳回組件名稱的 MSAA 方法，該組件是由此 AccessibilityImplementation 或其子元素之一所代表。 | AccessibilityImplementation | |
|
傳回組件系統角色的 MSAA 方法，該組件是由此 AccessibilityImplementation 或其子元素之一所代表。 | AccessibilityImplementation | |
|
傳回陣列的 MSAA 方法，該陣列包含所有選取子元素的 ID。 | AccessibilityImplementation | |
|
傳回組件目前執行階段狀態的 IAccessible 方法，該組件是由此 AccessibilityImplementation 或其子元素之一所代表。 | AccessibilityImplementation | |
|
傳回組件執行階段值的 MSAA 方法，該組件是由此 AccessibilityImplementation 或其子元素之一所代表。 | AccessibilityImplementation | |
| AccessibilityImplementation | ||
| AccessibilityImplementation | ||
|
傳回陣列，其中包含 AccessibilityImplementation 所有子元素的無正負號整數 ID。 | AccessibilityImplementation | |
| [靜態]
Method for supporting Form Accessibility. | AccImpl | |
|
指出物件是否有已定義的指定屬性。 | Object | |
| [靜態]
Returns true if an ancestor of the component has enabled set to false. | AccImpl | |
|
傳回 true 或 false，以指出具有由 x、y、width 與 height 所指定之範圍框的文字物件，是否應該被視為此 AccessibilityImplementation 所代表之組件的標籤。 | AccessibilityImplementation | |
|
指出 Object 類別的實體是否位於指定為參數的物件原型鏈中。 | Object | |
|
指出指定的屬性是否存在，以及是否可列舉。 | Object | |
|
為迴圈作業設定動態屬性的可用性。 | Object | |
|
傳回代表此物件的字串，根據地區特定慣例進行格式化。 | Object | |
|
會傳回指定之物件的字串形式。 | Object | |
|
會傳回指定之物件的基本值。 | Object | |
ButtonBarBaseAccImpl | () | 建構函式 |
public function ButtonBarBaseAccImpl(master:UIComponent)| 語言版本: | ActionScript 3.0 |
| 產品版本: | Flex 4 |
| 執行階段版本: | Flash Player 10, AIR 1.5 |
Constructor.
參數master:UIComponent — The UIComponent instance that this AccImpl instance
is making accessible.
|
enableAccessibility | () | 方法 |
public static function enableAccessibility():void| 語言版本: | ActionScript 3.0 |
| 產品版本: | Flex 4 |
| 執行階段版本: | Flash Player 10, AIR 1.5 |
Enables accessibility in the ButtonBarBase class.
This method is called by application startup code
that is autogenerated by the MXML compiler.
Afterwards, when instances of ButtonBarBase are initialized,
their accessibilityImplementation property
will be set to an instance of this class.
Tue Jun 12 2018, 03:47 PM Z