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AccessibleLayout.java
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1998-02-26
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/*
* @(#)AccessibleLayout.java 1.9 98/02/18
*
* 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;
import java.awt.*;
/**
* The AccessibleLayout interface is currently up for review and should
* only be used for experimental purposes. Interested parties should review
* this interface and send comments to
* <a href="mailto:access@sun.com">access@sun.com</a>. Based upon feedback
* from reviewers, we may add a method to AccessibleContext (e.g.,
* getAccessibleLayout) that will return an object that implements this
* interface if the Accessible object supports the layout of its children.
*
* @see Accessible
* @see AccessibleContext
*
* @version 1.9 02/18/98 14:38:33
* @author Willie Walker
* @author Peter Korn
*/
public interface AccessibleLayout {
/**
* Constant used to locate the object logically previous of the
* object passed in.
*/
public static final int LOGICAL_PREVIOUS = 0x00000001;
/**
* Constant used to locate the object logically next of the
* object passed in.
*/
public static final int LOGICAL_NEXT = 0x00000002;
/**
* Constant used to locate the first logical object in the container.
*/
public static final int LOGICAL_FIRST = 0x00000003;
/**
* Constant used to locate the last logical object in the container.
*/
public static final int LOGICAL_LAST = 0x00000004;
/**
* Constant used to locate the object physically above the
* object passed in.
*/
public static final int POSITION_ABOVE = 0x00000005;
/**
* Constant used to locate the object physically below the
* object passed in.
*/
public static final int POSITION_BELOW = 0x00000006;
/**
* Constant used to locate the object physically to the left of the
* object passed in.
*/
public static final int POSITION_LEFT = 0x00000007;
/**
* Constant used to locate the object physically to the right of the
* object passed in.
*/
public static final int POSITION_RIGHT = 0x00000008;
/**
* Constant used to locate the first physical object in the Container
*/
public static final int POSITION_FIRST = 0x00000009;
/**
* Constant used to locate the last physical object in the Container
*/
public static final int POSITION_LAST = 0x00000010;
/**
* Determine the object in the given relative direction
* from the Component passed in.
* @param comp the Component
* @param direction the direction to look in
* @return Component else null
*/
public abstract Component locate(Component comp, int direction);
/**
* Determine the object in the given relative direction
* from the Point passed in.
* @param p Point in screen coordinates
* @param direction the direction to look in
* @return Component else null
*/
public abstract Component locate(Point p, int direction);
/**
* Determine the first or last object in the Container.
* @param pos -- either POSITION_FIRST, POSITION_LAST,
* LOGICAL_FIRST, or LOGICAL_LAST
* @return Component else null
*/
public abstract Component locate(int pos);
/**
* Determine the focusable object in the given relative focus direction
* from the Component passed in. Note that this follows focus traversing
* rules, not the physical location of the Component itself.
* @param comp the Component
* @param pos -- either POSITION_PREVIOUS, POSITION_NEXT,
* LOGICAL_PREVIOUS, or LOGICAL_NEXT
* @return Component else null
*/
public abstract Component getFocusTraversable(Component comp, int direction);
/**
* Determine the first or last object in the Container that accepts focus.
* @param pos -- either POSITION_FIRST, POSITION_LAST,
* LOGICAL_FIRST, or LOGICAL_LAST
* @return Component else null
*/
public abstract Component getFocusTraversable(int pos);
}