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    1   /*
    2    * Copyright (c) 1997, 1999, 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   package java.awt.dnd;
   27   
   28   /**
   29    * This class contains constant values representing
   30    * the type of action(s) to be performed by a Drag and Drop operation.
   31    * @since 1.2
   32    */
   33   
   34   public final class DnDConstants {
   35   
   36       private DnDConstants() {} // define null private constructor.
   37   
   38       /**
   39        * An <code>int</code> representing no action.
   40        */
   41       public static final int ACTION_NONE         = 0x0;
   42   
   43       /**
   44        * An <code>int</code> representing a &quot;copy&quot; action.
   45        */
   46       public static final int ACTION_COPY         = 0x1;
   47   
   48       /**
   49        * An <code>int</code> representing a &quot;move&quot; action.
   50        */
   51       public static final int ACTION_MOVE         = 0x2;
   52   
   53       /**
   54        * An <code>int</code> representing a &quot;copy&quot; or
   55        * &quot;move&quot; action.
   56        */
   57       public static final int ACTION_COPY_OR_MOVE = ACTION_COPY | ACTION_MOVE;
   58   
   59       /**
   60        * An <code>int</code> representing a &quot;link&quot; action.
   61        *
   62        * The link verb is found in many, if not all native DnD platforms, and the
   63        * actual interpretation of LINK semantics is both platform
   64        * and application dependent. Broadly speaking, the
   65        * semantic is "do not copy, or move the operand, but create a reference
   66        * to it". Defining the meaning of "reference" is where ambiguity is
   67        * introduced.
   68        *
   69        * The verb is provided for completeness, but its use is not recommended
   70        * for DnD operations between logically distinct applications where
   71        * misinterpretation of the operations semantics could lead to confusing
   72        * results for the user.
   73        */
   74   
   75       public static final int ACTION_LINK         = 0x40000000;
   76   
   77       /**
   78        * An <code>int</code> representing a &quot;reference&quot;
   79        * action (synonym for ACTION_LINK).
   80        */
   81       public static final int ACTION_REFERENCE    = ACTION_LINK;
   82   
   83   }

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