/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2014 by RapidMiner and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapidminer.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package com.rapidminer.gui.new_plotter.gui.cellrenderer;

import java.awt.BorderLayout;
import java.awt.Component;

import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JSeparator;
import javax.swing.ListCellRenderer;


/**
 * @author Nils Woehler
 *
 */
public abstract class ComboSeparatorsRenderer implements ListCellRenderer {
    private ListCellRenderer delegate;
    private JPanel separatorPanel = new JPanel(new BorderLayout());
    private JSeparator separator = new JSeparator();

    public ComboSeparatorsRenderer(ListCellRenderer delegate) {
        this.delegate = delegate;
    }

    public Component getListCellRendererComponent(JList list, Object value,
            int index, boolean isSelected, boolean cellHasFocus) {
        Component comp = delegate.getListCellRendererComponent(list, value,
                index, isSelected, cellHasFocus);
        if (index != -1 && addSeparatorAfter(list, value, index)) {
            separatorPanel.removeAll();
            separatorPanel.add(comp, BorderLayout.CENTER);
            separatorPanel.add(separator, BorderLayout.NORTH);
            return separatorPanel;
        } else
            return comp;
    }

    protected abstract boolean addSeparatorAfter(JList list, Object value,
            int index);
}