AccessibleState (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

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Java™ Platform
Standard Ed. 6

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javax.accessibility
Class AccessibleState

java.lang.Object
  javax.accessibility.AccessibleBundle
      javax.accessibility.AccessibleState

public class AccessibleState
extends AccessibleBundle
extends AccessibleBundle

Class AccessibleState describes a component's particular state. The actual state of the component is defined as an AccessibleStateSet, which is a composed set of AccessibleStates.

The toDisplayString method allows you to obtain the localized string for a locale independent key from a predefined ResourceBundle for the keys defined in this class.

The constants in this class present a strongly typed enumeration of common object roles. A public constructor for this class has been purposely omitted and applications should use one of the constants from this class. If the constants in this class are not sufficient to describe the role of an object, a subclass should be generated from this class and it should provide constants in a similar manner.

Field Summary

static AccessibleState ACTIVE
          Indicates a window is currently the active window.

static AccessibleState ARMED
          Indicates that the object is armed.

static AccessibleState BUSY
          Indicates the current object is busy.

static AccessibleState CHECKED
          Indicates this object is currently checked.

static AccessibleState COLLAPSED
          Indicates this object is collapsed.

static AccessibleState EDITABLE
          Indicates the user can change the contents of this object.

static AccessibleState ENABLED
          Indicates this object is enabled.

static AccessibleState EXPANDABLE
          Indicates this object allows progressive disclosure of its children.

static AccessibleState EXPANDED
          Indicates this object is expanded.

static AccessibleState FOCUSABLE
          Indicates this object can accept keyboard focus, which means all events resulting from typing on the keyboard will normally be passed to it when it has focus.

static AccessibleState FOCUSED
          Indicates this object currently has the keyboard focus.

static AccessibleState HORIZONTAL
          Indicates the orientation of this object is horizontal.

static AccessibleState ICONIFIED
          Indicates this object is minimized and is represented only by an icon.

static AccessibleState INDETERMINATE
          Indicates that the object state is indeterminate.

static AccessibleState MANAGES_DESCENDANTS
          Indicates this object is responsible for managing its subcomponents.

static AccessibleState MODAL
          Indicates something must be done with this object before the user can interact with an object in a different window.

static AccessibleState MULTI_LINE
          Indicates this (text) object can contain multiple lines of text

static AccessibleState MULTISELECTABLE
          Indicates this object allows more than one of its children to be selected at the same time.

static AccessibleState OPAQUE
          Indicates this object paints every pixel within its rectangular region.

static AccessibleState PRESSED
          Indicates this object is currently pressed.

static AccessibleState RESIZABLE
          Indicates the size of this object is not fixed.

static AccessibleState SELECTABLE
          Indicates this object is the child of an object that allows its children to be selected, and that this child is one of those children that can be selected.

static AccessibleState SELECTED
          Indicates this object is the child of an object that allows its children to be selected, and that this child is one of those children that has been selected.

static AccessibleState SHOWING
          Indicates this object, the object's parent, the object's parent's parent, and so on, are all visible.

static AccessibleState SINGLE_LINE
          Indicates this (text) object can contain only a single line of text

static AccessibleState TRANSIENT
          Indicates this object is transient.

static AccessibleState TRUNCATED
          A state indicating that text is truncated by a bounding rectangle and that some of the text is not displayed on the screen.

static AccessibleState VERTICAL
          Indicates the orientation of this object is vertical.

static AccessibleState VISIBLE
          Indicates this object is visible.

Fields inherited from class javax.accessibility.AccessibleBundle

key

Constructor Summary

protected AccessibleState(String key)
          Creates a new AccessibleState using the given locale independent key.

Method Summary

Methods inherited from class javax.accessibility.AccessibleBundle

toDisplayString, toDisplayString, toDisplayString, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Summary
`static AccessibleState`	`ACTIVE` Indicates a window is currently the active window.
`static AccessibleState`	`ARMED` Indicates that the object is armed.
`static AccessibleState`	`BUSY` Indicates the current object is busy.
`static AccessibleState`	`CHECKED` Indicates this object is currently checked.
`static AccessibleState`	`COLLAPSED` Indicates this object is collapsed.
`static AccessibleState`	`EDITABLE` Indicates the user can change the contents of this object.
`static AccessibleState`	`ENABLED` Indicates this object is enabled.
`static AccessibleState`	`EXPANDABLE` Indicates this object allows progressive disclosure of its children.
`static AccessibleState`	`EXPANDED` Indicates this object is expanded.
`static AccessibleState`	`FOCUSABLE` Indicates this object can accept keyboard focus, which means all events resulting from typing on the keyboard will normally be passed to it when it has focus.
`static AccessibleState`	`FOCUSED` Indicates this object currently has the keyboard focus.
`static AccessibleState`	`HORIZONTAL` Indicates the orientation of this object is horizontal.
`static AccessibleState`	`ICONIFIED` Indicates this object is minimized and is represented only by an icon.
`static AccessibleState`	`INDETERMINATE` Indicates that the object state is indeterminate.
`static AccessibleState`	`MANAGES_DESCENDANTS` Indicates this object is responsible for managing its subcomponents.
`static AccessibleState`	`MODAL` Indicates something must be done with this object before the user can interact with an object in a different window.
`static AccessibleState`	`MULTI_LINE` Indicates this (text) object can contain multiple lines of text
`static AccessibleState`	`MULTISELECTABLE` Indicates this object allows more than one of its children to be selected at the same time.
`static AccessibleState`	`OPAQUE` Indicates this object paints every pixel within its rectangular region.
`static AccessibleState`	`PRESSED` Indicates this object is currently pressed.
`static AccessibleState`	`RESIZABLE` Indicates the size of this object is not fixed.
`static AccessibleState`	`SELECTABLE` Indicates this object is the child of an object that allows its children to be selected, and that this child is one of those children that can be selected.
`static AccessibleState`	`SELECTED` Indicates this object is the child of an object that allows its children to be selected, and that this child is one of those children that has been selected.
`static AccessibleState`	`SHOWING` Indicates this object, the object's parent, the object's parent's parent, and so on, are all visible.
`static AccessibleState`	`SINGLE_LINE` Indicates this (text) object can contain only a single line of text
`static AccessibleState`	`TRANSIENT` Indicates this object is transient.
`static AccessibleState`	`TRUNCATED` A state indicating that text is truncated by a bounding rectangle and that some of the text is not displayed on the screen.
`static AccessibleState`	`VERTICAL` Indicates the orientation of this object is vertical.
`static AccessibleState`	`VISIBLE` Indicates this object is visible.

Fields inherited from class javax.accessibility.AccessibleBundle
`key`

Constructor Summary
`protected`	`AccessibleState(String key)` Creates a new AccessibleState using the given locale independent key.

Methods inherited from class javax.accessibility.AccessibleBundle
`toDisplayString, toDisplayString, toDisplayString, toString`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

ACTIVE

public static final AccessibleState ACTIVE

Indicates a window is currently the active window. This includes windows, dialogs, frames, etc. In addition, this state is used to indicate the currently active child of a component such as a list, table, or tree. For example, the active child of a list is the child that is drawn with a rectangle around it.

See Also:: AccessibleRole.WINDOW, AccessibleRole.FRAME, AccessibleRole.DIALOG

PRESSED

public static final AccessibleState PRESSED

Indicates this object is currently pressed. This is usually associated with buttons and indicates the user has pressed a mouse button while the pointer was over the button and has not yet released the mouse button.

See Also:: AccessibleRole.PUSH_BUTTON

ARMED

public static final AccessibleState ARMED

Indicates that the object is armed. This is usually used on buttons that have been pressed but not yet released, and the mouse pointer is still over the button.

See Also:: AccessibleRole.PUSH_BUTTON

BUSY

public static final AccessibleState BUSY

Indicates the current object is busy. This is usually used on objects such as progress bars, sliders, or scroll bars to indicate they are in a state of transition.

See Also:: AccessibleRole.PROGRESS_BAR, AccessibleRole.SCROLL_BAR, AccessibleRole.SLIDER

CHECKED

public static final AccessibleState CHECKED

Indicates this object is currently checked. This is usually used on objects such as toggle buttons, radio buttons, and check boxes.

See Also:: AccessibleRole.TOGGLE_BUTTON, AccessibleRole.RADIO_BUTTON, AccessibleRole.CHECK_BOX

EDITABLE

public static final AccessibleState EDITABLE

Indicates the user can change the contents of this object. This is usually used primarily for objects that allow the user to enter text. Other objects, such as scroll bars and sliders, are automatically editable if they are enabled.

See Also:: ENABLED

EXPANDABLE

public static final AccessibleState EXPANDABLE

Indicates this object allows progressive disclosure of its children. This is usually used with hierarchical objects such as trees and is often paired with the EXPANDED or COLLAPSED states.

See Also:: EXPANDED, COLLAPSED, AccessibleRole.TREE

COLLAPSED

public static final AccessibleState COLLAPSED

Indicates this object is collapsed. This is usually paired with the EXPANDABLE state and is used on objects that provide progressive disclosure such as trees.

See Also:: EXPANDABLE, EXPANDED, AccessibleRole.TREE

EXPANDED

public static final AccessibleState EXPANDED

Indicates this object is expanded. This is usually paired with the EXPANDABLE state and is used on objects that provide progressive disclosure such as trees.

See Also:: EXPANDABLE, COLLAPSED, AccessibleRole.TREE

ENABLED

public static final AccessibleState ENABLED

Indicates this object is enabled. The absence of this state from an object's state set indicates this object is not enabled. An object that is not enabled cannot be manipulated by the user. In a graphical display, it is usually grayed out.

FOCUSABLE

public static final AccessibleState FOCUSABLE

Indicates this object can accept keyboard focus, which means all events resulting from typing on the keyboard will normally be passed to it when it has focus.

See Also:: FOCUSED

FOCUSED

public static final AccessibleState FOCUSED

Indicates this object currently has the keyboard focus.

See Also:: FOCUSABLE

ICONIFIED

public static final AccessibleState ICONIFIED

Indicates this object is minimized and is represented only by an icon. This is usually only associated with frames and internal frames.

See Also:: AccessibleRole.FRAME, AccessibleRole.INTERNAL_FRAME

MODAL

public static final AccessibleState MODAL

Indicates something must be done with this object before the user can interact with an object in a different window. This is usually associated only with dialogs.

See Also:: AccessibleRole.DIALOG

OPAQUE

public static final AccessibleState OPAQUE

Indicates this object paints every pixel within its rectangular region. A non-opaque component paints only some of its pixels, allowing the pixels underneath it to "show through". A component that does not fully paint its pixels therefore provides a degree of transparency.

See Also:: Accessible.getAccessibleContext(), AccessibleContext.getAccessibleComponent(), AccessibleComponent.getBounds()

RESIZABLE

public static final AccessibleState RESIZABLE

Indicates the size of this object is not fixed.

See Also:: Accessible.getAccessibleContext(), AccessibleContext.getAccessibleComponent(), AccessibleComponent.getSize(), AccessibleComponent.setSize(java.awt.Dimension)

MULTISELECTABLE

public static final AccessibleState MULTISELECTABLE

Indicates this object allows more than one of its children to be selected at the same time.

See Also:: Accessible.getAccessibleContext(), AccessibleContext.getAccessibleSelection(), AccessibleSelection

SELECTABLE

public static final AccessibleState SELECTABLE

Indicates this object is the child of an object that allows its children to be selected, and that this child is one of those children that can be selected.

See Also:: SELECTED, Accessible.getAccessibleContext(), AccessibleContext.getAccessibleSelection(), AccessibleSelection

SELECTED

public static final AccessibleState SELECTED

Indicates this object is the child of an object that allows its children to be selected, and that this child is one of those children that has been selected.

See Also:: SELECTABLE, Accessible.getAccessibleContext(), AccessibleContext.getAccessibleSelection(), AccessibleSelection

SHOWING

public static final AccessibleState SHOWING

Indicates this object, the object's parent, the object's parent's parent, and so on, are all visible. Note that this does not necessarily mean the object is painted on the screen. It might be occluded by some other showing object.

See Also:: VISIBLE

VISIBLE

public static final AccessibleState VISIBLE

Indicates this object is visible. Note: this means that the object intends to be visible; however, it may not in fact be showing on the screen because one of the objects that this object is contained by is not visible.

See Also:: SHOWING

VERTICAL

public static final AccessibleState VERTICAL

Indicates the orientation of this object is vertical. This is usually associated with objects such as scrollbars, sliders, and progress bars.

See Also:: VERTICAL, AccessibleRole.SCROLL_BAR, AccessibleRole.SLIDER, AccessibleRole.PROGRESS_BAR

HORIZONTAL

public static final AccessibleState HORIZONTAL

Indicates the orientation of this object is horizontal. This is usually associated with objects such as scrollbars, sliders, and progress bars.

See Also:: HORIZONTAL, AccessibleRole.SCROLL_BAR, AccessibleRole.SLIDER, AccessibleRole.PROGRESS_BAR

SINGLE_LINE

public static final AccessibleState SINGLE_LINE

Indicates this (text) object can contain only a single line of text

MULTI_LINE

public static final AccessibleState MULTI_LINE

Indicates this (text) object can contain multiple lines of text

TRANSIENT

public static final AccessibleState TRANSIENT

Indicates this object is transient. An assistive technology should not add a PropertyChange listener to an object with transient state, as that object will never generate any events. Transient objects are typically created to answer Java Accessibility method queries, but otherwise do not remain linked to the underlying object (for example, those objects underneath lists, tables, and trees in Swing, where only one actual UI Component does shared rendering duty for all of the data objects underneath the actual list/table/tree elements).

Since:: 1.5

MANAGES_DESCENDANTS

public static final AccessibleState MANAGES_DESCENDANTS

Indicates this object is responsible for managing its subcomponents. This is typically used for trees and tables that have a large number of subcomponents and where the objects are created only when needed and otherwise remain virtual. The application should not manage the subcomponents directly.

Since:: 1.5

INDETERMINATE

public static final AccessibleState INDETERMINATE

Indicates that the object state is indeterminate. An example is selected text that is partially bold and partially not bold. In this case the attributes associated with the selected text are indeterminate.

Since:: 1.5

TRUNCATED

public static final AccessibleState TRUNCATED

A state indicating that text is truncated by a bounding rectangle and that some of the text is not displayed on the screen. An example is text in a spreadsheet cell that is truncated by the bounds of the cell.

Since:: 1.5

Constructor Detail

AccessibleState

protected AccessibleState(String key)

Creates a new AccessibleState using the given locale independent key. This should not be a public method. Instead, it is used to create the constants in this file to make it a strongly typed enumeration. Subclasses of this class should enforce similar policy.

The key String should be a locale independent key for the state. It is not intended to be used as the actual String to display to the user. To get the localized string, use toDisplayString.

Parameters:: key - the locale independent name of the state.
See Also:: AccessibleBundle.toDisplayString(java.lang.String, java.util.Locale)