/*
 * SortableHeaderRenderer.java
 *
 * Copyright (C) 2002-2013 Takis Diakoumis
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 */

package org.underworldlabs.swing.table;

import java.awt.Component;

import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.table.TableCellRenderer;

/**
 * Header renderer for the table sorter model.
 * 
 * @author   Takis Diakoumis
 * @version  $Revision: 1185 $
 * @date     $Date: 2013-02-08 22:16:55 +1100 (Fri, 08 Feb 2013) $
 */
public class SortableHeaderRenderer extends DefaultTableHeaderRenderer
                                    implements TableCellRenderer {

    /** the up arrow icon */
    private ArrowIcon upIcon;
    
    /** the down arrow icon */
    private ArrowIcon downIcon;
    
    /** the table sorter for this header */
    private TableSorter sorter;
    
    public SortableHeaderRenderer(TableSorter sorter) {
        
        super(DEFAULT_HEIGHT);

        this.sorter = sorter;

        // init the icons
        upIcon = new ArrowIcon(ArrowIcon.UP);
        downIcon = new ArrowIcon(ArrowIcon.DOWN);

        // set the sort icon to the right of the text
        setHorizontalTextPosition(JLabel.LEFT);
    }

    public Component getTableCellRendererComponent(JTable table,
                                                   Object value,
                                                   boolean isSelected,
                                                   boolean hasFocus,
                                                   int row,
                                                   int column) {

        int modelColumn = table.convertColumnIndexToModel(column);
        int iconType = sorter.getHeaderRendererIcon(modelColumn);
        if (iconType == -1) {
            setIcon(null);
        } else {
            setIcon(iconType == ArrowIcon.UP ? upIcon : downIcon);
        }
        
        return super.getTableCellRendererComponent(
                            table, value, isSelected, hasFocus, row, column);
    }

}






