/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2014 by RapidMiner and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapidminer.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package com.rapidminer.gui.new_plotter.gui.dnd;

import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.Transferable;
import java.util.LinkedList;
import java.util.List;

import javax.swing.Icon;
import javax.swing.JComponent;
import javax.swing.JList;
import javax.swing.TransferHandler;

import com.rapidminer.gui.dnd.AbstractPatchedTransferHandler;
import com.rapidminer.gui.new_plotter.configuration.DataTableColumn;

/**
 * {@link TransferHandler} for exporting {@link DataTableColumn}s from Lists.
 * 
 * @author Nils Woehler
 * 
 */
public class DataTableColumnListTransferHandler extends AbstractPatchedTransferHandler {

	private static final long serialVersionUID = 1L;

	/*
	 * ***************** EXPORT **********************
	 */

	@Override
	public void exportToClipboard(JComponent comp, Clipboard clip, int action) throws IllegalStateException {
		return; // do not export data table columns
	}

	@Override
	public int getSourceActions(JComponent c) {
		return COPY;
	}

	@Override
	public Icon getVisualRepresentation(Transferable t) {
		//		String i18nKey = "plotter.configuration_dialog.table_column";
		//
		//		// set label icon
		//		String icon = I18N.getMessageOrNull(I18N.getGUIBundle(), "gui.label." + i18nKey + ".icon");
		//		if (icon != null) {
		//			ImageIcon iicon = SwingTools.createIcon("16/" + icon);
		//			return iicon;
		//		}
		return null;
	}

	@Override
	protected Transferable createTransferable(JComponent c) {
		JList source = (JList) c;
		Object[] selectedValues = source.getSelectedValues();
		List<DataTableColumn> columns = new LinkedList<DataTableColumn>();
		if (selectedValues != null) {
			int length = selectedValues.length;
			for(int i = 0; i<length; ++i) {
				columns.add((DataTableColumn) selectedValues[i]);
			}
		}
		return new DataTableColumnCollectionTransferable(new DataTableColumnCollection(columns));
	}

	@Override
	protected void exportDone(JComponent source, Transferable data, int action) {
		return;
	}

	/*
	 * ****************** IMPORT ******************
	 */

	@Override
	public boolean canImport(TransferSupport support) {
		return false;
	}

	@Override
	public boolean importData(TransferSupport support) {
		return false;
	}

}