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///////////////////////////////////////////////////////////////////////////////
// For information as to what this class does, see the Javadoc, below.       //
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,       //
// 2007, 2008, 2009, 2010, 2014, 2015, 2022 by Peter Spirtes, Richard        //
// Scheines, Joseph Ramsey, and Clark Glymour.                               //
//                                                                           //
// This program is free software; you can redistribute it and/or modify      //
// it under the terms of the GNU General Public License as published by      //
// the Free Software Foundation; either version 2 of the License, or         //
// (at your option) any later version.                                       //
//                                                                           //
// This program is distributed in the hope that it will be useful,           //
// but WITHOUT ANY WARRANTY; without even the implied warranty of            //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             //
// GNU General Public License for more details.                              //
//                                                                           //
// You should have received a copy of the GNU General Public License         //
// along with this program; if not, write to the Free Software               //
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA //
///////////////////////////////////////////////////////////////////////////////

package edu.cmu.tetradapp.editor;

import edu.cmu.tetradapp.util.InternalClipboard;

import javax.swing.*;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.ClipboardOwner;
import java.awt.datatransfer.Transferable;
import java.awt.event.ActionEvent;
import java.util.List;

/**
 * Copies a selection of session nodes in the frontmost session editor, to the clipboard.
 *
 * @author josephramsey
 * @version $Id: $Id
 */
public class CopySubgraphAction extends AbstractAction implements ClipboardOwner {

    /**
     * The desktop containing the target session editor.
     */
    private final GraphEditable graphEditor;

    /**
     * Creates a new copy subsession action for the given desktop and clipboard.
     *
     * @param graphEditor a {@link edu.cmu.tetradapp.editor.GraphEditable} object
     */
    public CopySubgraphAction(GraphEditable graphEditor) {
        super("Copy Selected Items");

        if (graphEditor == null) {
            throw new NullPointerException("Desktop must not be null.");
        }

        this.graphEditor = graphEditor;
    }

    /**
     * {@inheritDoc}
     * 
     * Copies a parentally closed selection of session nodes in the frontmost session editor to the clipboard.
     */
    public void actionPerformed(ActionEvent e) {
        List modelComponents = this.graphEditor.getSelectedModelComponents();
        SubgraphSelection selection = new SubgraphSelection(modelComponents);
        InternalClipboard.getInstance().setContents(selection, this);
    }

    /**
     * {@inheritDoc}
     * 
     * Required by the AbstractAction interface; does nothing.
     */
    public void lostOwnership(Clipboard clipboard, Transferable contents) {
    }
}