1 /*
   2  * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 
  27 
  28 package java.awt.dnd;
  29 
  30 import java.util.EventListener;
  31 
  32 /**
  33  * The listener interface for receiving drag gesture events.
  34  * This interface is intended for a drag gesture recognition
  35  * implementation. See a specification for {@code DragGestureRecognizer}
  36  * for details on how to register the listener interface.
  37  * Upon recognition of a drag gesture the {@code
  38  * DragGestureRecognizer} calls this interface's
  39  * {@link #dragGestureRecognized dragGestureRecognized()}
  40  * method and passes a {@code DragGestureEvent}.
  41 
  42  *
  43  * @see java.awt.dnd.DragGestureRecognizer
  44  * @see java.awt.dnd.DragGestureEvent
  45  * @see java.awt.dnd.DragSource
  46  */
  47 
  48  public interface DragGestureListener extends EventListener {
  49 
  50     /**
  51      * This method is invoked by the {@code DragGestureRecognizer}
  52      * when the {@code DragGestureRecognizer} detects a platform-dependent
  53      * drag initiating gesture. To initiate the drag and drop operation,
  54      * if appropriate, {@link DragGestureEvent#startDrag startDrag()} method on
  55      * the {@code DragGestureEvent} has to be invoked.
  56      *
  57      * @see java.awt.dnd.DragGestureRecognizer
  58      * @see java.awt.dnd.DragGestureEvent
  59      * @param dge the <code>DragGestureEvent</code> describing
  60      * the gesture that has just occurred
  61      */
  62 
  63      void dragGestureRecognized(DragGestureEvent dge);
  64 }
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