java.lang.Object
- org.eclipse.swt.accessibility.Accessible

```
public class Accessible
extends java.lang.Object
```
Instances of this class provide a bridge between application code and assistive technology clients. Many platforms provide default accessible behavior for most widgets, and this class allows that default behavior to be overridden. Applications can get the default Accessible object for a control by sending it getAccessible, and then add an accessible listener to override simple items like the name and help string, or they can add an accessible control listener to override complex items. As a rule of thumb, an application would only want to use the accessible control listener to implement accessibility for a custom control.

Since:

1.4

See Also:

Control.getAccessible(), AccessibleListener, AccessibleEvent, AccessibleControlListener, AccessibleControlEvent, Accessibility snippets, Sample code and further information

Constructor Summary

Constructors
Constructor Description

Accessible(Accessible parent)
Constructs a new instance of this class given its parent.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addAccessibleActionListener(AccessibleActionListener listener)`	Adds the listener to the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the `AccessibleAction` interface.
`void`	`addAccessibleAttributeListener(AccessibleAttributeListener listener)`	Adds the listener to the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the `AccessibleAttribute` interface.
`void`	`addAccessibleControlListener(AccessibleControlListener listener)`	Adds the listener to the collection of listeners who will be notified when an accessible client asks for custom control specific information.
`void`	`addAccessibleEditableTextListener(AccessibleEditableTextListener listener)`	Adds the listener to the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the `AccessibleEditableText` interface.
`void`	`addAccessibleHyperlinkListener(AccessibleHyperlinkListener listener)`	Adds the listener to the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the `AccessibleHyperlink` interface.
`void`	`addAccessibleListener(AccessibleListener listener)`	Adds the listener to the collection of listeners who will be notified when an accessible client asks for certain strings, such as name, description, help, or keyboard shortcut.
`void`	`addAccessibleTableCellListener(AccessibleTableCellListener listener)`	Adds the listener to the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the `AccessibleTableCell` interface.
`void`	`addAccessibleTableListener(AccessibleTableListener listener)`	Adds the listener to the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the `AccessibleTable` interface.
`void`	`addAccessibleTextListener(AccessibleTextListener listener)`	Adds the listener to the collection of listeners who will be notified when an accessible client asks for custom text control specific information.
`void`	`addAccessibleValueListener(AccessibleValueListener listener)`	Adds the listener to the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the `AccessibleValue` interface.
`void`	`addRelation(int type, Accessible target)`	Adds a relation with the specified type and target to the receiver's set of relations.
`void`	`dispose()`	Disposes of the operating system resources associated with the receiver, and removes the receiver from its parent's list of children.
`Control`	`getControl()`	Returns the control for this Accessible object.
`void`	`internal_dispose_Accessible()`	Invokes platform specific functionality to dispose an accessible object.
`static Accessible`	`internal_new_Accessible(Control control)`	Invokes platform specific functionality to allocate a new accessible object.
`int`	`internal_WM_GETOBJECT(int wParam, int lParam)`	Invokes platform specific functionality to handle a window message.
`void`	`removeAccessibleActionListener(AccessibleActionListener listener)`	Removes the listener from the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the `AccessibleAction` interface.
`void`	`removeAccessibleAttributeListener(AccessibleAttributeListener listener)`	Removes the listener from the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the `AccessibleAttribute` interface.
`void`	`removeAccessibleControlListener(AccessibleControlListener listener)`	Removes the listener from the collection of listeners who will be notified when an accessible client asks for custom control specific information.
`void`	`removeAccessibleEditableTextListener(AccessibleEditableTextListener listener)`	Removes the listener from the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the `AccessibleEditableText` interface.
`void`	`removeAccessibleHyperlinkListener(AccessibleHyperlinkListener listener)`	Removes the listener from the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the `AccessibleHyperlink` interface.
`void`	`removeAccessibleListener(AccessibleListener listener)`	Removes the listener from the collection of listeners who will be notified when an accessible client asks for certain strings, such as name, description, help, or keyboard shortcut.
`void`	`removeAccessibleTableCellListener(AccessibleTableCellListener listener)`	Removes the listener from the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the `AccessibleTableCell` interface.
`void`	`removeAccessibleTableListener(AccessibleTableListener listener)`	Removes the listener from the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the `AccessibleTable` interface.
`void`	`removeAccessibleTextListener(AccessibleTextListener listener)`	Removes the listener from the collection of listeners who will be notified when an accessible client asks for custom text control specific information.
`void`	`removeAccessibleValueListener(AccessibleValueListener listener)`	Removes the listener from the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the `AccessibleValue` interface.
`void`	`removeRelation(int type, Accessible target)`	Removes the relation with the specified type and target from the receiver's set of relations.
`void`	`selectionChanged()`	Sends a message to accessible clients that the child selection within a custom container control has changed.
`void`	`sendEvent(int event, java.lang.Object eventData)`	Sends a message with event-specific data to accessible clients indicating that something has changed within a custom control.
`void`	`setFocus(int childID)`	Sends a message to accessible clients indicating that the focus has changed within a custom control.
`void`	`textCaretMoved(int index)`	Sends a message to accessible clients that the text caret has moved within a custom control.
`void`	`textChanged(int type, int startIndex, int length)`	Sends a message to accessible clients that the text within a custom control has changed.
`void`	`textSelectionChanged()`	Sends a message to accessible clients that the text selection has changed within a custom control.

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

- Constructor Detail
  - Accessible
```
public Accessible(Accessible parent)
```
    Constructs a new instance of this class given its parent.
    Parameters:
    
    parent - the Accessible parent, which must not be null
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the parent is null
    
    See Also:
    
    Control.getAccessible()
- Method Detail
  - internal_new_Accessible
```
public static Accessible internal_new_Accessible(Control control)
```
    Invokes platform specific functionality to allocate a new accessible object.
    IMPORTANT: This method is not part of the public API for Accessible. It is marked public only so that it can be shared within the packages provided by SWT. It is not available on all platforms, and should never be called from application code.
    
    Parameters:
    
    control - the control to get the accessible object for
    
    Returns:
    
    the platform specific accessible object
  - addAccessibleListener
```
public void addAccessibleListener(AccessibleListener listener)
```
    Adds the listener to the collection of listeners who will be notified when an accessible client asks for certain strings, such as name, description, help, or keyboard shortcut. The listener is notified by sending it one of the messages defined in the AccessibleListener interface.
    Parameters:
    
    listener - the listener that should be notified when the receiver is asked for a name, description, help, or keyboard shortcut string
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleListener, removeAccessibleListener(org.eclipse.swt.accessibility.AccessibleListener)
  - removeAccessibleListener
```
public void removeAccessibleListener(AccessibleListener listener)
```
    Removes the listener from the collection of listeners who will be notified when an accessible client asks for certain strings, such as name, description, help, or keyboard shortcut.
    Parameters:
    
    listener - the listener that should no longer be notified when the receiver is asked for a name, description, help, or keyboard shortcut string
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleListener, addAccessibleListener(org.eclipse.swt.accessibility.AccessibleListener)
  - addAccessibleControlListener
```
public void addAccessibleControlListener(AccessibleControlListener listener)
```
    Adds the listener to the collection of listeners who will be notified when an accessible client asks for custom control specific information. The listener is notified by sending it one of the messages defined in the AccessibleControlListener interface.
    Parameters:
    
    listener - the listener that should be notified when the receiver is asked for custom control specific information
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleControlListener, removeAccessibleControlListener(org.eclipse.swt.accessibility.AccessibleControlListener)
  - removeAccessibleControlListener
```
public void removeAccessibleControlListener(AccessibleControlListener listener)
```
    Removes the listener from the collection of listeners who will be notified when an accessible client asks for custom control specific information.
    Parameters:
    
    listener - the listener that should no longer be notified when the receiver is asked for custom control specific information
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleControlListener, addAccessibleControlListener(org.eclipse.swt.accessibility.AccessibleControlListener)
  - addAccessibleTextListener
```
public void addAccessibleTextListener(AccessibleTextListener listener)
```
    Adds the listener to the collection of listeners who will be notified when an accessible client asks for custom text control specific information. The listener is notified by sending it one of the messages defined in the AccessibleTextListener and AccessibleTextExtendedListener interfaces.
    Parameters:
    
    listener - the listener that should be notified when the receiver is asked for custom text control specific information
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleTextListener, AccessibleTextExtendedListener, removeAccessibleTextListener(org.eclipse.swt.accessibility.AccessibleTextListener)
  - removeAccessibleTextListener
```
public void removeAccessibleTextListener(AccessibleTextListener listener)
```
    Removes the listener from the collection of listeners who will be notified when an accessible client asks for custom text control specific information.
    Parameters:
    
    listener - the listener that should no longer be notified when the receiver is asked for custom text control specific information
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleTextListener, AccessibleTextExtendedListener, addAccessibleTextListener(org.eclipse.swt.accessibility.AccessibleTextListener)
  - addAccessibleActionListener
```
public void addAccessibleActionListener(AccessibleActionListener listener)
```
    Adds the listener to the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the AccessibleAction interface.
    Parameters:
    
    listener - the listener that should be notified when the receiver is asked for AccessibleAction interface properties
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleActionListener, removeAccessibleActionListener(org.eclipse.swt.accessibility.AccessibleActionListener)
  - addAccessibleEditableTextListener
```
public void addAccessibleEditableTextListener(AccessibleEditableTextListener listener)
```
    Adds the listener to the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the AccessibleEditableText interface.
    Parameters:
    
    listener - the listener that should be notified when the receiver is asked for AccessibleEditableText interface properties
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleEditableTextListener, removeAccessibleEditableTextListener(org.eclipse.swt.accessibility.AccessibleEditableTextListener)
  - addAccessibleHyperlinkListener
```
public void addAccessibleHyperlinkListener(AccessibleHyperlinkListener listener)
```
    Adds the listener to the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the AccessibleHyperlink interface.
    Parameters:
    
    listener - the listener that should be notified when the receiver is asked for AccessibleHyperlink interface properties
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleHyperlinkListener, removeAccessibleHyperlinkListener(org.eclipse.swt.accessibility.AccessibleHyperlinkListener)
  - addAccessibleTableListener
```
public void addAccessibleTableListener(AccessibleTableListener listener)
```
    Adds the listener to the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the AccessibleTable interface.
    Parameters:
    
    listener - the listener that should be notified when the receiver is asked for AccessibleTable interface properties
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleTableListener, removeAccessibleTableListener(org.eclipse.swt.accessibility.AccessibleTableListener)
  - addAccessibleTableCellListener
```
public void addAccessibleTableCellListener(AccessibleTableCellListener listener)
```
    Adds the listener to the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the AccessibleTableCell interface.
    Parameters:
    
    listener - the listener that should be notified when the receiver is asked for AccessibleTableCell interface properties
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleTableCellListener, removeAccessibleTableCellListener(org.eclipse.swt.accessibility.AccessibleTableCellListener)
  - addAccessibleValueListener
```
public void addAccessibleValueListener(AccessibleValueListener listener)
```
    Adds the listener to the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the AccessibleValue interface.
    Parameters:
    
    listener - the listener that should be notified when the receiver is asked for AccessibleValue interface properties
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleValueListener, removeAccessibleValueListener(org.eclipse.swt.accessibility.AccessibleValueListener)
  - addAccessibleAttributeListener
```
public void addAccessibleAttributeListener(AccessibleAttributeListener listener)
```
    Adds the listener to the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the AccessibleAttribute interface.
    Parameters:
    
    listener - the listener that should be notified when the receiver is asked for AccessibleAttribute interface properties
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleAttributeListener, removeAccessibleAttributeListener(org.eclipse.swt.accessibility.AccessibleAttributeListener)
  - addRelation
```
public void addRelation(int type,
                        Accessible target)
```
    Adds a relation with the specified type and target to the receiver's set of relations.
    
    Parameters:
    
    type - an ACC constant beginning with RELATION_* indicating the type of relation
    
    target - the accessible that is the target for this relation
  - dispose
```
public void dispose()
```
    Disposes of the operating system resources associated with the receiver, and removes the receiver from its parent's list of children.
    This method should be called when an accessible that was created with the public constructor Accessible(Accessible parent) is no longer needed. You do not need to call this when the receiver's control is disposed, because all Accessible instances associated with a control are released when the control is disposed. It is also not necessary to call this for instances of Accessible that were retrieved with Control.getAccessible().
  - getControl
```
public Control getControl()
```
    Returns the control for this Accessible object.
    
    Returns:
    
    the receiver's control
  - removeAccessibleActionListener
```
public void removeAccessibleActionListener(AccessibleActionListener listener)
```
    Removes the listener from the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the AccessibleAction interface.
    Parameters:
    
    listener - the listener that should no longer be notified when the receiver is asked for AccessibleAction interface properties
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleActionListener, addAccessibleActionListener(org.eclipse.swt.accessibility.AccessibleActionListener)
  - removeAccessibleEditableTextListener
```
public void removeAccessibleEditableTextListener(AccessibleEditableTextListener listener)
```
    Removes the listener from the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the AccessibleEditableText interface.
    Parameters:
    
    listener - the listener that should no longer be notified when the receiver is asked for AccessibleEditableText interface properties
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleEditableTextListener, addAccessibleEditableTextListener(org.eclipse.swt.accessibility.AccessibleEditableTextListener)
  - removeAccessibleHyperlinkListener
```
public void removeAccessibleHyperlinkListener(AccessibleHyperlinkListener listener)
```
    Removes the listener from the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the AccessibleHyperlink interface.
    Parameters:
    
    listener - the listener that should no longer be notified when the receiver is asked for AccessibleHyperlink interface properties
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleHyperlinkListener, addAccessibleHyperlinkListener(org.eclipse.swt.accessibility.AccessibleHyperlinkListener)
  - removeAccessibleTableListener
```
public void removeAccessibleTableListener(AccessibleTableListener listener)
```
    Removes the listener from the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the AccessibleTable interface.
    Parameters:
    
    listener - the listener that should no longer be notified when the receiver is asked for AccessibleTable interface properties
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleTableListener, addAccessibleTableListener(org.eclipse.swt.accessibility.AccessibleTableListener)
  - removeAccessibleTableCellListener
```
public void removeAccessibleTableCellListener(AccessibleTableCellListener listener)
```
    Removes the listener from the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the AccessibleTableCell interface.
    Parameters:
    
    listener - the listener that should no longer be notified when the receiver is asked for AccessibleTableCell interface properties
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleTableCellListener, addAccessibleTableCellListener(org.eclipse.swt.accessibility.AccessibleTableCellListener)
  - removeAccessibleValueListener
```
public void removeAccessibleValueListener(AccessibleValueListener listener)
```
    Removes the listener from the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the AccessibleValue interface.
    Parameters:
    
    listener - the listener that should no longer be notified when the receiver is asked for AccessibleValue interface properties
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleValueListener, addAccessibleValueListener(org.eclipse.swt.accessibility.AccessibleValueListener)
  - removeAccessibleAttributeListener
```
public void removeAccessibleAttributeListener(AccessibleAttributeListener listener)
```
    Removes the listener from the collection of listeners that will be notified when an accessible client asks for any of the properties defined in the AccessibleAttribute interface.
    Parameters:
    
    listener - the listener that should no longer be notified when the receiver is asked for AccessibleAttribute interface properties
    
    Throws:
    
    java.lang.IllegalArgumentException -
    
    ERROR_NULL_ARGUMENT - if the listener is null
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    AccessibleAttributeListener, addAccessibleAttributeListener(org.eclipse.swt.accessibility.AccessibleAttributeListener)
  - removeRelation
```
public void removeRelation(int type,
                           Accessible target)
```
    Removes the relation with the specified type and target from the receiver's set of relations.
    
    Parameters:
    
    type - an ACC constant beginning with RELATION_* indicating the type of relation
    
    target - the accessible that is the target for this relation
  - sendEvent
```
public void sendEvent(int event,
                      java.lang.Object eventData)
```
    Sends a message with event-specific data to accessible clients indicating that something has changed within a custom control.
    Parameters:
    
    event - an ACC constant beginning with EVENT_* indicating the message to send
    
    eventData - an object containing event-specific data, or null if there is no event-specific data
    
    Throws:
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    ACC.EVENT_ACTION_CHANGED, ACC.EVENT_ATTRIBUTE_CHANGED, ACC.EVENT_DESCRIPTION_CHANGED, ACC.EVENT_DOCUMENT_LOAD_COMPLETE, ACC.EVENT_DOCUMENT_LOAD_STOPPED, ACC.EVENT_DOCUMENT_RELOAD, ACC.EVENT_HYPERLINK_ACTIVATED, ACC.EVENT_HYPERLINK_ANCHOR_COUNT_CHANGED, ACC.EVENT_HYPERLINK_END_INDEX_CHANGED, ACC.EVENT_HYPERLINK_SELECTED_LINK_CHANGED, ACC.EVENT_HYPERLINK_START_INDEX_CHANGED, ACC.EVENT_HYPERTEXT_LINK_COUNT_CHANGED, ACC.EVENT_HYPERTEXT_LINK_SELECTED, ACC.EVENT_LOCATION_CHANGED, ACC.EVENT_NAME_CHANGED, ACC.EVENT_PAGE_CHANGED, ACC.EVENT_SECTION_CHANGED, ACC.EVENT_SELECTION_CHANGED, ACC.EVENT_STATE_CHANGED, ACC.EVENT_TABLE_CAPTION_CHANGED, ACC.EVENT_TABLE_CHANGED, ACC.EVENT_TABLE_COLUMN_DESCRIPTION_CHANGED, ACC.EVENT_TABLE_COLUMN_HEADER_CHANGED, ACC.EVENT_TABLE_ROW_DESCRIPTION_CHANGED, ACC.EVENT_TABLE_ROW_HEADER_CHANGED, ACC.EVENT_TABLE_SUMMARY_CHANGED, ACC.EVENT_TEXT_ATTRIBUTE_CHANGED, ACC.EVENT_TEXT_CARET_MOVED, ACC.EVENT_TEXT_CHANGED, ACC.EVENT_TEXT_COLUMN_CHANGED, ACC.EVENT_TEXT_SELECTION_CHANGED, ACC.EVENT_VALUE_CHANGED
  - selectionChanged
```
public void selectionChanged()
```
    Sends a message to accessible clients that the child selection within a custom container control has changed.
    Throws:
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
  - textCaretMoved
```
public void textCaretMoved(int index)
```
    Sends a message to accessible clients that the text caret has moved within a custom control.
    Parameters:
    
    index - the new caret index within the control
    
    Throws:
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
  - textChanged
```
public void textChanged(int type,
                        int startIndex,
                        int length)
```
    Sends a message to accessible clients that the text within a custom control has changed.
    Parameters:
    
    type - the type of change, one of ACC.TEXT_INSERT or ACC.TEXT_DELETE
    
    startIndex - the text index within the control where the insertion or deletion begins
    
    length - the non-negative length in characters of the insertion or deletion
    
    Throws:
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
    
    See Also:
    
    ACC.TEXT_INSERT, ACC.TEXT_DELETE
  - textSelectionChanged
```
public void textSelectionChanged()
```
    Sends a message to accessible clients that the text selection has changed within a custom control.
    Throws:
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
  - setFocus
```
public void setFocus(int childID)
```
    Sends a message to accessible clients indicating that the focus has changed within a custom control.
    Parameters:
    
    childID - an identifier specifying a child of the control
    
    Throws:
    
    SWTException -
    
    ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed
    
    ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control
  - internal_dispose_Accessible
```
public void internal_dispose_Accessible()
```
    Invokes platform specific functionality to dispose an accessible object.
    IMPORTANT: This method is not part of the public API for Accessible. It is marked public only so that it can be shared within the packages provided by SWT. It is not available on all platforms, and should never be called from application code.
  - internal_WM_GETOBJECT
```
public int internal_WM_GETOBJECT(int wParam,
                                 int lParam)
```
    Invokes platform specific functionality to handle a window message.
    IMPORTANT: This method is not part of the public API for Accessible. It is marked public only so that it can be shared within the packages provided by SWT. It is not available on all platforms, and should never be called from application code.

Class Accessible

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Accessible

Method Detail

internal_new_Accessible

addAccessibleListener

removeAccessibleListener

addAccessibleControlListener

removeAccessibleControlListener

addAccessibleTextListener

removeAccessibleTextListener

addAccessibleActionListener

addAccessibleEditableTextListener

addAccessibleHyperlinkListener

addAccessibleTableListener

addAccessibleTableCellListener

addAccessibleValueListener

addAccessibleAttributeListener

addRelation

dispose

getControl

removeAccessibleActionListener

removeAccessibleEditableTextListener

removeAccessibleHyperlinkListener

removeAccessibleTableListener

removeAccessibleTableCellListener

removeAccessibleValueListener

removeAccessibleAttributeListener

removeRelation

sendEvent

selectionChanged

textCaretMoved

textChanged

textSelectionChanged

setFocus

internal_dispose_Accessible

internal_WM_GETOBJECT