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jeremybenn |
/* AccessibleAction.java -- aids in accessibly performing actions
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Copyright (C) 2000, 2002, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.accessibility;
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/**
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* If an object implements this interface then it must be able to perform one
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* or more actions. Accessibility software can use the implementations of this
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* interface to discover and perform actions on an object.
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*
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* <p>The <code>AccessibleContext.getAccessibleAction()</code> method should
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* return <code>null</code> if an object does not implement this interface.
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*
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* @author Eric Blake (ebb9@email.byu.edu)
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* @see Accessible
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* @see AccessibleContext
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* @see AccessibleContext#getAccessibleAction()
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* @since 1.2
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* @status updated to 1.4
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*/
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public interface AccessibleAction
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{
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/**
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* The name of an action which decrements a value.
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*
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* @since 1.5
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*/
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static final String DECREMENT = "decrement";
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/**
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* The name of an action which increments a value.
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*
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* @since 1.5
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*/
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static final String INCREMENT = "increment";
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/**
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* The name of an action which toggles the expansion of a tree node.
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*
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* @since 1.5
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*/
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static final String TOGGLE_EXPAND = "toggle expand";
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/**
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* The name of an action which causes a component to perform its default
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* action.
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*
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* @since 1.6
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*/
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static final String CLICK = "click";
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/**
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* The name of an action which toggles the state of a popup, causing a
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* hidden popup to be displayed and a visible popup to be hidden.
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*
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* @since 1.6
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*/
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static final String TOGGLE_POPUP = "toggle popup";
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/**
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* Get the number possible actions for this object, with the zeroth
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* representing the default action.
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*
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* @return the 0-based number of actions
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*/
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int getAccessibleActionCount();
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/**
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* Get a description for the specified action. Returns null if out of
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* bounds.
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*
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* @param i the action to describe, 0-based
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* @return description of the action
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*/
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String getAccessibleActionDescription(int i);
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/**
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* Perform the specified action. Does nothing if out of bounds.
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*
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* @param i the action to perform, 0-based
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* @return true if the action was performed
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*/
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boolean doAccessibleAction(int i);
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} // interface AccessibleAction
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