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jeremybenn |
/* DragSourceListener.java -- listen to events during the drag
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Copyright (C) 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 java.awt.dnd;
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import java.util.EventListener;
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/**
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* This class allows an object to listen for drag and drop events. It can
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* be used to provide appropriate feedback for "drag over" actions. You can
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* also use a <code>DragSourceAdapter</code> to filter the events you are
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* interested in.
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*
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* @author Eric Blake (ebb9@email.byu.edu)
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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 DragSourceListener extends EventListener
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{
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/**
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* Called when the cursor hotspot enters a drop site which will accept the
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* drag.
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*
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* @param e the drag source drag event
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*/
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void dragEnter(DragSourceDragEvent e);
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/**
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* Called when the cursor hotspot moves inside of a drop site which will
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* accept the drag.
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*
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* @param e the drag source drag event
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*/
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void dragOver(DragSourceDragEvent e);
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/**
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* Called when the user modifies the drop gesture. This is often the case
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* when additional mouse or key events are received during the drag.
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*
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* @param e the drag source drag event
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*/
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void dropActionChanged(DragSourceDragEvent e);
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/**
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* Called when the cursor hotspot moves outside of a drop site which will
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* accept the drag. This could also happen if the drop site is no longer
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* active, or no longer accepts the drag.
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*
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* @param e the drag source drag event
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*/
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void dragExit(DragSourceEvent e);
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/**
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* Called when the drag and drop operation is complete. After this event,
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* <code>getDropSuccess</code> of the event is valid, and
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* <code>getDropAction</code> holds the action requested by the drop site.
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* Furthermore, the <code>DragSourceContext</code> is invalidated.
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*
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* @param e the drag source drag event
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*/
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void dragDropEnd(DragSourceDropEvent e);
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} // interface DragSourceListener
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