/*******************************************************************************
* Copyright (c) 2000, 2005 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.draw2d;
/**
* The base class for accessible objects which provides accesibilty clients with a unique
* ID.
*/
public class AccessibleBase {
/**
* Returns the id of this accessible object using {@link Object#hashCode()}.
* @return the id
*/
public final int getAccessibleID() {
/* This assumes that the native implementation of hashCode in Object is to
* return the pointer to the Object, which should be U-unique.
*/
int value = super.hashCode();
/*
* Values -3, -2, and -1 are reserved by SWT's ACC class to have special meaning.
* Therefore, a child cannot have this value.
*/
if (value < 0)
value -= 4;
return value;
}
}