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AccessibleValue.java
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1998-02-26
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/*
* @(#)AccessibleValue.java 1.5 98/02/04
*
* Copyright (c) 1997 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the confidential and proprietary information of Sun
* Microsystems, Inc. ("Confidential Information"). You shall not
* disclose such Confidential Information and shall use it only in
* accordance with the terms of the license agreement you entered into
* with Sun.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
* SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
* SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
* THIS SOFTWARE OR ITS DERIVATIVES.
*
*/
package com.sun.java.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
* <a href="com.sun.java.accessibility.Accessible.html">Accessible</a>) and
* then calling the
* <a href="com.sun.java.accessibility.AccessibleContext.html#getAccessibleValue">
* getAccessibleValue</a> method of AccessibleContext. If the return
* value is not null, the object supports this interface.
*
* @see Accessible
* @see Accessible#getAccessibleContext
* @see AccessibleContext
* @see AccessibleContext#getAccessibleValue
*
* @version 1.5 02/04/98 11:49:35
* @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();
}