/*******************************************************************************
* Copyright (c) 2000, 2016 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.accessibility;
/**
* This adapter class provides default implementations for the
* methods described by the AccessibleTextListener
interface.
*
* Classes that wish to deal with AccessibleTextEvent
s can
* extend this class and override only the methods that they are
* interested in.
*
* 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. * When returning a child identifier to a client, you may use CHILDID_NONE * to indicate that no child or control has the required information. *
* Note: This adapter is typically used by implementors of * a custom control to provide very detailed information about * the control instance to accessibility clients. *
* * @see AccessibleTextListener * @see AccessibleTextEvent * @see Sample code and further information * * @since 3.0 */ public abstract class AccessibleTextAdapter implements AccessibleTextListener { /** * Sent when an accessibility client requests the current character offset * of the text caret. * The default behavior is to do nothing. *
* Return the caret offset in the offset
* field of the event object.
*
* Return the selection start offset and non-negative length in the
* offset
and length
fields of the event object.
*