001/* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-present, by David Gilbert 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 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
025 * Other names may be trademarks of their respective owners.]
026 *
027 * -----------------------
028 * ChartEditorManager.java
029 * -----------------------
030 * (C) Copyright 2005-present, by David Gilbert.
031 *
032 * Original Author:  David Gilbert;
033 * Contributor(s):   ;
034 * 
035 */
036
037package org.jfree.chart.editor;
038
039import org.jfree.chart.JFreeChart;
040import org.jfree.chart.util.Args;
041
042/**
043 * The central point for obtaining {@link ChartEditor} instances for editing
044 * charts.  Right now, the API is minimal - the plan is to extend this class
045 * to provide customisation options for chart editors (for example, make some
046 * editor items read-only).
047 */
048public class ChartEditorManager {
049
050    /** This factory creates new {@link ChartEditor} instances as required. */
051    static ChartEditorFactory factory = new DefaultChartEditorFactory();
052
053    /**
054     * Private constructor prevents instantiation.
055     */
056    private ChartEditorManager() {
057        // nothing to do
058    }
059
060    /**
061     * Returns the current factory.
062     *
063     * @return The current factory (never {@code null}).
064     */
065    public static ChartEditorFactory getChartEditorFactory() {
066        return factory;
067    }
068
069    /**
070     * Sets the chart editor factory.
071     *
072     * @param f  the new factory ({@code null} not permitted).
073     */
074    public static void setChartEditorFactory(ChartEditorFactory f) {
075        Args.nullNotPermitted(f, "f");
076        factory = f;
077    }
078
079    /**
080     * Returns a component that can be used to edit the given chart.
081     *
082     * @param chart  the chart.
083     *
084     * @return The chart editor.
085     */
086    public static ChartEditor getChartEditor(JFreeChart chart) {
087        return factory.createEditor(chart);
088    }
089}