    001    /* ========================================================================
    002     * JCommon : a free general purpose class library for the Java(tm) platform
    003     * ========================================================================
    004     *
    005     * (C) Copyright 2000-2009, by Object Refinery Limited and Contributors.
    006     *
    007     * Project Info:  http://www.jfree.org/jcommon/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     * StrokeChooserPanel.java
    029     * -----------------------
    030     * (C) Copyright 2000-2009, by Object Refinery Limited.
    031     *
    032     * Original Author:  David Gilbert (for Object Refinery Limited);
    033     * Contributor(s):   Dirk Zeitz;
    034     *
    035     * $Id: StrokeChooserPanel.java,v 1.8 2009/02/27 13:58:41 mungady Exp $
    036     *
    037     * Changes (from 26-Oct-2001)
    038     * --------------------------
    039     * 26-Oct-2001 : Changed package to com.jrefinery.ui.*;
    040     * 14-Oct-2002 : Fixed errors reported by Checkstyle (DG);
    041     * 16-Mar-2004 : Fix for focus problems (DZ);
    042     * 27-Feb-2009 : Fixed bug 2612649, NullPointerException (DG);
    043     *
    044     */
    045
    046    package org.jfree.ui;
    047
    048    import java.awt.BorderLayout;
    049    import java.awt.Stroke;
    050    import java.awt.event.ActionEvent;
    051    import java.awt.event.ActionListener;
    052
    053    import javax.swing.DefaultComboBoxModel;
    054    import javax.swing.JComboBox;
    055    import javax.swing.JPanel;
    056
    057    /**
    058     * A component for choosing a stroke from a list of available strokes.  This
    059     * class needs work.
    060     *
    061     * @author David Gilbert
    062     */
    063    public class StrokeChooserPanel extends JPanel {
    064
    065        /** A combo for selecting the stroke. */
    066        private JComboBox selector;
    067
    068        /**
    069         * Creates a panel containing a combo-box that allows the user to select
    070         * one stroke from a list of available strokes.
    071         *
    072         * @param current  the current stroke sample.
    073         * @param available  an array of 'available' stroke samples.
    074         */
    075        public StrokeChooserPanel(StrokeSample current, StrokeSample[] available) {
    076            setLayout(new BorderLayout());
    077            // we've changed the behaviour here to populate the combo box
    078            // with Stroke objects directly - ideally we'd change the signature
    079            // of the constructor too...maybe later.
    080            DefaultComboBoxModel model = new DefaultComboBoxModel();
    081            for (int i = 0; i < available.length; i++) {
    082                model.addElement(available[i].getStroke());
    083            }
    084            this.selector = new JComboBox(model);
    085            this.selector.setSelectedItem(current.getStroke());
    086            this.selector.setRenderer(new StrokeSample(null));
    087            add(this.selector);
    088            // Changes due to focus problems!! DZ
    089            this.selector.addActionListener(new ActionListener() {
    090                public void actionPerformed(final ActionEvent evt) {
    091                    getSelector().transferFocus();
    092                }
    093            });
    094        }
    095
    096
    097        /**
    098         * Returns the selector component.
    099         *
    100         * @return Returns the selector.
    101         */
    102        protected final JComboBox getSelector() {
    103            return this.selector;
    104        }
    105
    106        /**
    107         * Returns the selected stroke.
    108         *
    109         * @return The selected stroke (possibly <code>null</code>).
    110         */
    111        public Stroke getSelectedStroke() {
    112            return (Stroke) this.selector.getSelectedItem();
    113        }
    114
    115    }