| /******************************************************************************* |
| * Copyright (c) 2000, 2010 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; |
| } |
| |
| } |
