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* Copyright (c) 2005-2010 Laf-Widget Kirill Grouchnikov. All Rights Reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* o Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* o Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* o Neither the name of Laf-Widget Kirill Grouchnikov nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package org.pushingpixels.lafwidget.tree.dnd;
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import java.util.EventListener;
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* TreeTreeDnDListener represents a listener that receives notifications when
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* some node from a tree is moved or copied into itself (or into another tree).
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* @author Antonio Vieiro (antonio@antonioshome.net), $Author: kirillcool $
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public interface TreeTreeDnDListener extends EventListener {
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* Invoked to verify that a node may be dropped into another node.
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* a TreeTreeDnDEvent the event containing information about the
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* Drag and Drop operation.
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* @throws DnDVetoException
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* if the drag and drop operation is not valid.
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public void mayDrop(TreeTreeDnDEvent anEvent) throws DnDVetoException;
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* Invoked when the drop operation happens.
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* a TreeTreeDnDEvent the event containing information about the
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* Drag and Drop operation.
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* @throws DnDVetoException
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* if the drag and drop operation is not valid.
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public void drop(TreeTreeDnDEvent anEvent) throws DnDVetoException;