/*

 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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 General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package javax.swing.plaf.basic;

import javax.swing.*;

import javax.swing.event.*;

import javax.swing.border.*;

import java.awt.*;

import java.io.Serializable;

/**

 * ComboBox renderer

 * <p>

 * <strong>Warning:</strong>

 * Serialized objects of this class will not be compatible with

 * future Swing releases. The current serialization support is

 * appropriate for short term storage or RMI between applications running

 * the same version of Swing.  As of 1.4, support for long term storage

 * of all JavaBeans™

 * has been added to the <code>java.beans</code> package.

 * Please see {@link java.beans.XMLEncoder}.

 *

 * @author Arnaud Weber

 */

@SuppressWarnings("serial") // Same-version serialization only

public class BasicComboBoxRenderer extends JLabel

implements ListCellRenderer, Serializable {

   /**

    * An empty <code>Border</code>. This field might not be used. To change the

    * <code>Border</code> used by this renderer directly set it using

    * the <code>setBorder</code> method.

    */

    protected static Border noFocusBorder = new EmptyBorder(1, 1, 1, 1);

    private final static Border SAFE_NO_FOCUS_BORDER = new EmptyBorder(1, 1, 1, 1);

    public BasicComboBoxRenderer() {

        super();

        setOpaque(true);

        setBorder(getNoFocusBorder());

    }

    private static Border getNoFocusBorder() {

        if (System.getSecurityManager() != null) {

            return SAFE_NO_FOCUS_BORDER;

        } else {

            return noFocusBorder;

        }

    }

    public Dimension getPreferredSize() {

        Dimension size;

        if ((this.getText() == null) || (this.getText().equals( "" ))) {

            setText( " " );

            size = super.getPreferredSize();

            setText( "" );

        }

        else {

            size = super.getPreferredSize();

        }

        return size;

    }

    public Component getListCellRendererComponent(

                                                 JList list,

                                                 Object value,

                                                 int index,

                                                 boolean isSelected,

                                                 boolean cellHasFocus)

    {

        /**if (isSelected) {

            setBackground(UIManager.getColor("ComboBox.selectionBackground"));

            setForeground(UIManager.getColor("ComboBox.selectionForeground"));

        } else {

            setBackground(UIManager.getColor("ComboBox.background"));

            setForeground(UIManager.getColor("ComboBox.foreground"));

        }**/

        if (isSelected) {

            setBackground(list.getSelectionBackground());

            setForeground(list.getSelectionForeground());

        }

        else {

            setBackground(list.getBackground());

            setForeground(list.getForeground());

        }

        setFont(list.getFont());

        if (value instanceof Icon) {

            setIcon((Icon)value);

        }

        else {

            setText((value == null) ? "" : value.toString());

        }

        return this;

    }

    /**

     * A subclass of BasicComboBoxRenderer that implements UIResource.

     * BasicComboBoxRenderer doesn't implement UIResource

     * directly so that applications can safely override the

     * cellRenderer property with BasicListCellRenderer subclasses.

     * <p>

     * <strong>Warning:</strong>

     * Serialized objects of this class will not be compatible with

     * future Swing releases. The current serialization support is

     * appropriate for short term storage or RMI between applications running

     * the same version of Swing.  As of 1.4, support for long term storage

     * of all JavaBeans™

     * has been added to the <code>java.beans</code> package.

     * Please see {@link java.beans.XMLEncoder}.

     */

    @SuppressWarnings("serial") // Same-version serialization only

    public static class UIResource extends BasicComboBoxRenderer implements javax.swing.plaf.UIResource {

    }

}