    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
    046package org.jfree.ui;
    047
    048import java.awt.BorderLayout;
    049import java.awt.Stroke;
    050import java.awt.event.ActionEvent;
    051import java.awt.event.ActionListener;
    052
    053import javax.swing.DefaultComboBoxModel;
    054import javax.swing.JComboBox;
    055import 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 */
    063public 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}