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91 lines
3.4 KiB
Java
91 lines
3.4 KiB
Java
/*
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* Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package javax.accessibility;
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/**
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* The {@code AccessibleValue} interface should be supported by any object that
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* supports a numerical value (e.g., a scroll bar). This interface provides the
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* standard mechanism for an assistive technology to determine and set the
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* numerical value as well as get the minimum and maximum values. Applications
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* can determine if an object supports the {@code AccessibleValue} interface by
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* first obtaining its {@code AccessibleContext} (see {@link Accessible}) and
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* then calling the {@link AccessibleContext#getAccessibleValue} method. If the
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* return value is not {@code null}, the object supports this interface.
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*
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* @author Peter Korn
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* @author Hans Muller
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* @author Willie Walker
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* @see Accessible
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* @see Accessible#getAccessibleContext
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* @see AccessibleContext
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* @see AccessibleContext#getAccessibleValue
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*/
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public interface AccessibleValue {
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/**
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* Get the value of this object as a {@code Number}. If the value has not
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* been set, the return value will be {@code null}.
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*
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* @return value of the object
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* @see #setCurrentAccessibleValue
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*/
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public Number getCurrentAccessibleValue();
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/**
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* Set the value of this object as a {@code Number}.
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*
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* @param n the number to use for the value
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* @return {@code true} if the value was set; else {@code false}
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* @see #getCurrentAccessibleValue
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*/
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public boolean setCurrentAccessibleValue(Number n);
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// /**
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// * Get the description of the value of this object.
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// *
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// * @return description of the value of the object
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// */
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// public String getAccessibleValueDescription();
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/**
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* Get the minimum value of this object as a {@code Number}.
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*
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* @return minimum value of the object; {@code null} if this object does not
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* have a minimum value
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* @see #getMaximumAccessibleValue
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*/
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public Number getMinimumAccessibleValue();
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/**
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* Get the maximum value of this object as a {@code Number}.
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*
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* @return maximum value of the object; {@code null} if this object does not
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* have a maximum value
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* @see #getMinimumAccessibleValue
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*/
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public Number getMaximumAccessibleValue();
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}
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