    001    /* ===========================================================
    002     * JFreeChart : a free chart library for the Java(tm) platform
    003     * ===========================================================
    004     *
    005     * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
    006     *
    007     * Project Info:  http://www.jfree.org/jfreechart/index.html
    008     *
    009     * This library is free software; you can redistribute it and/or modify it
    010     * under the terms of the GNU Lesser General Public License as published by
    011     * the Free Software Foundation; either version 2.1 of the License, or
    012     * (at your option) any later version.
    013     *
    014     * This library is distributed in the hope that it will be useful, but
    015     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    016     * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
    017     * License for more details.
    018     *
    019     * You should have received a copy of the GNU Lesser General Public
    020     * License along with this library; if not, write to the Free Software
    021     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
    022     * USA.
    023     *
    024     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
    025     * in the United States and other countries.]
    026     *
    027     * -----------------------
    028     * ChartEditorManager.java
    029     * -----------------------
    030     * (C) Copyright 2005, by Object Refinery Limited.
    031     *
    032     * Original Author:  David Gilbert (for Object Refinery Limited);
    033     * Contributor(s):   ;
    034     *
    035     * $Id: ChartEditorManager.java,v 1.1.2.2 2005/11/28 15:19:32 mungady Exp $
    036     *
    037     * Changes
    038     * -------
    039     * 24-Nov-2005 : Version 1 (DG);
    040     *
    041     */
    042
    043    package org.jfree.chart.editor;
    044
    045    import org.jfree.chart.JFreeChart;
    046
    047    /**
    048     * The central point for obtaining {@link ChartEditor} instances for editing
    049     * charts.  Right now, the API is minimal - the plan is to extend this class
    050     * to provide customisation options for chart editors (for example, make some
    051     * editor items read-only).
    052     */
    053    public class ChartEditorManager {
    054
    055        /** This factory creates new {@link ChartEditor} instances as required. */
    056        static ChartEditorFactory factory = new DefaultChartEditorFactory();
    057
    058        /**
    059         * Private constructor prevents instantiation.
    060         */
    061        private ChartEditorManager() {
    062            // nothing to do
    063        }
    064
    065        /**
    066         * Returns the current factory.
    067         *
    068         * @return The current factory (never <code>null</code>).
    069         */
    070        public static ChartEditorFactory getChartEditorFactory() {
    071            return factory;
    072        }
    073
    074        /**
    075         * Sets the chart editor factory.
    076         *
    077         * @param f  the new factory (<code>null</code> not permitted).
    078         */
    079        public static void setChartEditorFactory(ChartEditorFactory f) {
    080            if (f == null) {
    081                throw new IllegalArgumentException("Null 'f' argument.");
    082            }
    083            factory = f;
    084        }
    085
    086        /**
    087         * Returns a component that can be used to edit the given chart.
    088         *
    089         * @param chart  the chart.
    090         *
    091         * @return The chart editor.
    092         */
    093        public static ChartEditor getChartEditor(JFreeChart chart) {
    094            return factory.createEditor(chart);
    095        }
    096    }