org.eclipse.swt.accessibility
Interface AccessibleTextListener

All Known Subinterfaces:

AccessibleTextExtendedListener

All Known Implementing Classes:

AccessibleTextAdapter, AccessibleTextExtendedAdapter

public interface AccessibleTextListener

Classes that implement this interface provide methods that deal with the events that are generated when an accessibility client sends a message to a control.

After creating an instance of a class that implements this interface it can be added to a control using the addAccessibleTextListener method and removed using the removeAccessibleTextListener method. When a client requests information the appropriate method will be invoked.

Note: Accessibility clients use child identifiers to specify whether they want information about a control or one of its children. Child identifiers are increasing integers beginning with 0. The identifier CHILDID_SELF represents the control itself.

Note: This interface is typically used by implementors of a custom control to provide very detailed information about the control instance to accessibility clients.

Since:

1.4

See Also:

AccessibleTextAdapter, AccessibleTextEvent

Method Summary

void	getCaretOffset(AccessibleTextEvent e) Sent when an accessibility client requests the current character offset of the text caret.
void	getSelectionRange(AccessibleTextEvent e) Sent when an accessibility client requests the range of the current text selection.

Method Detail

getCaretOffset

void getCaretOffset(AccessibleTextEvent e)

Sent when an accessibility client requests the current character offset of the text caret.

Return the caret offset in the offset field of the event object.

Parameters:

e - an event object containing the following fields:

• childID [IN] - an identifier specifying a child of the control
• offset [OUT] - the current offset of the text caret

getSelectionRange

void getSelectionRange(AccessibleTextEvent e)

Sent when an accessibility client requests the range of the current text selection.

Return the selection start offset and non-negative length in the offset and length fields of the event object.

Parameters:

e - an event object containing the following fields:

• childID [IN] - an identifier specifying a child of the control
• offset [OUT] - the offset of the current text selection
• length [OUT] - the length of the current text selection