jkflist.java

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/*
 * $Log: JKFList.java,v $
 * Revision 1.4  2003/01/23 14:40:55  willaxt
 * changed semantics of setData()
 *
 * Revision 1.3  2003/01/23 14:34:21  willaxt
 * changed source comments
 *
 * Revision 1.2  2003/01/23 14:07:29  willaxt
 * changed javadoc comment
 *
 * Revision 1.1  2003/01/23 14:00:16  willaxt
 * initial version
 *
 */
package de.fhm.jkf.gui;

import java.util.Vector;

import javax.swing.DefaultListSelectionModel;
import javax.swing.JList;
import javax.swing.ListModel;

/**
 * <br><br><center><table border="1" width="80%"><hr>
 * <strong><a href="http://jkf.sourceforge.net">The JKF Project</a></strong>
 * <p>
 * Copyright (C) 2002 by Theodor Willax
 * <p>
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * <p>
 * This library 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
 * Lesser General Public License for more details.
 * <p>
 * You should have received a copy of the <a href="http://www.gnu.org/copyleft/lesser.html">
 * GNU Lesser General Public License</a> along with this library; if not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA  02111-1307  USA
 * <hr></table></center>
 * 
 * JKF implementation of a <code>JList</code>. Implements the
 * <code>DataExchangable</code> interface for automatic data exchange.
 * 
 * @author Theodor Willax
 * @version $Revision: 1.4 $
 */
public class JKFList extends JList implements DataExchangable {

	/**
	 * Constructs a <code>JKFList</code> that displays the
	 * elements in the specified, non-<code>null</code> model.
	 */
	public JKFList(ListModel dataModel) {
		super(dataModel);
	}

	/**
	 * Constructs a <code>JKFList</code> that displays the elements in the
	 * specified array.
	 */
	public JKFList(Object[] listData) {
		super(listData);
	}

	/**
	 *Constructs a <code>JKFList</code> that displays the elements in the
	 * specified <code>Vector</code> .
	 */
	public JKFList(Vector listData) {
		super(listData);
	}

	/**
	 * Constructs a <code>JKFList</code> with an empty model.
	 */
	public JKFList() {
		super();
	}

	/**
	 * Set's the lists selected items. Data has to be given in a
	 * <code>Vector</code>.
	 * 
	 * @param data The data to be selected, wrapped in a
	 * <code>Vector</code>.
	 * @see de.fhm.jkf.gui.DataExchangable#setData(Object)
	 */
	public void setData(Object data) {
		clearSelection();
		Vector v = (Vector) data;
		int size = v.size() - 1;
		for (int i=0; i < size; i++) {
			setSelectedValue(v.get(i), false);
		}
		// scroll only to the last element, scrolling for each would be to slow
		setSelectedValue(v.lastElement(), true);
	}

	/**
	 * Returns the lists selected data. In single selection mode,
	 * only one data object in a <code>Vector</code> is returned.
	 * If multiple selections are allowed, the selected values are
	 * all put into an <code>Vector</code> and returned.
	 * 
	 * @return Object The lists selected data in a <code>Vector</code>
	 * @see de.fhm.jkf.gui.DataExchangable#getData()
	 */
	public Object getData() {
		// are we in single selection mode
		if (getSelectionMode() == DefaultListSelectionModel.SINGLE_SELECTION) {
			Vector v = new Vector(1);
			v.add(getSelectedValue());
			return v;
		} else {
			Object o[] = getSelectedValues();
			Vector v = new Vector(o.length);
			for (int i=0; i < o.length; i++) {
				v.add(o[i]);
			}
			return v;
		}
	}
}