/*******************************************************************************
 * Breakout Cave Survey Visualizer
 *
 * Copyright (C) 2014 James Edwards
 *
 * jedwards8 at fastmail dot fm
 *
 * 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 2 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 General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *******************************************************************************/
package org.andork.swing;

import java.awt.Component;
import java.awt.Cursor;
import java.util.HashSet;
import java.util.Set;

import javax.swing.event.RowSorterEvent;
import javax.swing.event.RowSorterListener;

public class AnnotatingRowSorterCursorController implements RowSorterListener {
	Component target;

	Set<AnnotatingRowSorter<?, ?>> busySorters = new HashSet<AnnotatingRowSorter<?, ?>>();

	public AnnotatingRowSorterCursorController(Component target) {
		super();
		this.target = target;
	}

	@Override
	public void sorterChanged(RowSorterEvent e) {
		if (e.getSource() instanceof AnnotatingRowSorter) {
			AnnotatingRowSorter<?, ?> sorter = (org.andork.swing.AnnotatingRowSorter<?, ?>) e.getSource();
			if (sorter.isSortingInBackground()) {
				busySorters.add(sorter);
			} else {
				busySorters.remove(sorter);
			}

			target.setCursor(busySorters.isEmpty() ? null : Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
		}
	}
}