org.eclipse.swt.accessibility
Interface AccessibleListener

All Known Implementing Classes:

AccessibleAdapter

public interface AccessibleListener

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 addAccessibleListener method and removed using the removeAccessibleListener 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.

Since:

1.4

See Also:

AccessibleAdapter, AccessibleEvent

Method Summary

void	getDescription(AccessibleEvent e) Sent when an accessibility client requests a description of the control, or a description of a child of the control.
void	getHelp(AccessibleEvent e) Sent when an accessibility client requests the help string of the control, or the help string of a child of the control.
void	getKeyboardShortcut(AccessibleEvent e) Sent when an accessibility client requests the keyboard shortcut of the control, or the keyboard shortcut of a child of the control.
void	getName(AccessibleEvent e) Sent when an accessibility client requests the name of the control, or the name of a child of the control.

Method Detail

getName

void getName(AccessibleEvent e)

Sent when an accessibility client requests the name of the control, or the name of a child of the control.

Return the name of the control or specified child in the result field of the event object. Returning an empty string tells the client that the control or child does not have a name, and returning null tells the client to use the platform name.

Parameters:

e - an event object containing the following fields:

• childID [IN] - an identifier specifying the control or one of its children
• result [OUT] - the requested name string, or null

getHelp

void getHelp(AccessibleEvent e)

Sent when an accessibility client requests the help string of the control, or the help string of a child of the control.

The information in this property should be similar to the help provided by toolTipText. It describes what the control or child does or how to use it, as opposed to getDescription, which describes appearance.

Return the help string of the control or specified child in the result field of the event object. Returning an empty string tells the client that the control or child does not have a help string, and returning null tells the client to use the platform help string.

Parameters:

e - an event object containing the following fields:

• childID [IN] - an identifier specifying the control or one of its children
• result [OUT] - the requested help string, or null

getKeyboardShortcut

void getKeyboardShortcut(AccessibleEvent e)

Sent when an accessibility client requests the keyboard shortcut of the control, or the keyboard shortcut of a child of the control.

A keyboard shortcut can either be a mnemonic, or an accelerator. As a general rule, if the control or child can receive keyboard focus, then you should expose its mnemonic, and if it cannot receive keyboard focus, then you should expose its accelerator.

Return the keyboard shortcut string of the control or specified child in the result field of the event object. Returning an empty string tells the client that the control or child does not have a keyboard shortcut string, and returning null tells the client to use the platform keyboard shortcut string.

Parameters:

e - an event object containing the following fields:

• childID [IN] - an identifier specifying the control or one of its children
• result [OUT] - the requested keyboard shortcut string (example: "ALT+N"), or null

getDescription

void getDescription(AccessibleEvent e)

Sent when an accessibility client requests a description of the control, or a description of a child of the control.

This is a textual description of the control or child's visual appearance, which is typically only necessary if it cannot be determined from other properties such as role.

Return the description of the control or specified child in the result field of the event object. Returning an empty string tells the client that the control or child does not have a description, and returning null tells the client to use the platform description.

Parameters:

e - an event object containing the following fields:

• childID [IN] - an identifier specifying the control or one of its children
• result [OUT] - the requested description string, or null