| /* |
| * Copyright (c) 1997, 1999, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package javax.accessibility; |
| |
| /** |
| * The AccessibleValue interface should be supported by any object |
| * that supports a numerical value (e.g., a scroll bar). This interface |
| * provides the standard mechanism for an assistive technology to determine |
| * and set the numerical value as well as get the minimum and maximum values. |
| * Applications can determine |
| * if an object supports the AccessibleValue interface by first |
| * obtaining its AccessibleContext (see |
| * {@link Accessible}) and then calling the |
| * {@link AccessibleContext#getAccessibleValue} method. |
| * If the return value is not null, the object supports this interface. |
| * |
| * @see Accessible |
| * @see Accessible#getAccessibleContext |
| * @see AccessibleContext |
| * @see AccessibleContext#getAccessibleValue |
| * |
| * @author Peter Korn |
| * @author Hans Muller |
| * @author Willie Walker |
| */ |
| public interface AccessibleValue { |
| |
| /** |
| * Get the value of this object as a Number. If the value has not been |
| * set, the return value will be null. |
| * |
| * @return value of the object |
| * @see #setCurrentAccessibleValue |
| */ |
| public Number getCurrentAccessibleValue(); |
| |
| /** |
| * Set the value of this object as a Number. |
| * |
| * @return True if the value was set; else False |
| * @see #getCurrentAccessibleValue |
| */ |
| public boolean setCurrentAccessibleValue(Number n); |
| |
| // /** |
| // * Get the description of the value of this object. |
| // * |
| // * @return description of the value of the object |
| // */ |
| // public String getAccessibleValueDescription(); |
| |
| /** |
| * Get the minimum value of this object as a Number. |
| * |
| * @return Minimum value of the object; null if this object does not |
| * have a minimum value |
| * @see #getMaximumAccessibleValue |
| */ |
| public Number getMinimumAccessibleValue(); |
| |
| /** |
| * Get the maximum value of this object as a Number. |
| * |
| * @return Maximum value of the object; null if this object does not |
| * have a maximum value |
| * @see #getMinimumAccessibleValue |
| */ |
| public Number getMaximumAccessibleValue(); |
| } |