TableRefreshPropertyListener.java

/*
 * ====================================================================
 * 
 * The ObjectStyle Group Software License, Version 1.0
 * 
 * Copyright (c) 2006 The ObjectStyle Group and individual authors of the
 * software. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
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 * 1. Redistributions of source code must retain the above copyright notice,
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 * 3. The end-user documentation included with the redistribution, if any, must
 * include the following acknowlegement: "This product includes software
 * developed by the ObjectStyle Group (http://objectstyle.org/)." Alternately,
 * this acknowlegement may appear in the software itself, if and wherever such
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package org.objectstyle.wolips.eomodeler.utils;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

import org.eclipse.jface.viewers.TableViewer;

public class TableRefreshPropertyListener implements PropertyChangeListener {
	private SelectionThrottle _throttle;

	private TableViewer _tableViewer;

	public TableRefreshPropertyListener(String name, TableViewer tableViewer) {
		_tableViewer = tableViewer;
		_throttle = new SelectionThrottle(name, new SelectionThrottle.TableViewerSelectionHandler(tableViewer));
	}

	public void start() {
		_throttle.start();
	}

	public void stop() {
		_throttle.stop();
	}

	public void propertyChange(PropertyChangeEvent event) {
		Object source = event.getSource();
		Object oldValue = event.getOldValue();
		Object newValue = event.getNewValue();
		if (oldValue instanceof Collection && newValue instanceof Collection) {
			Set newSet = new HashSet((Collection) newValue);
			newSet.removeAll((Collection) oldValue);
			_tableViewer.add(newSet.toArray());
			Set oldSet = new HashSet((Collection) oldValue);
			oldSet.removeAll((Collection) newValue);
			_tableViewer.remove(oldSet.toArray());
			_throttle.objectsAdded(newSet);
			_throttle.objectsRemoved(oldSet);
			TableUtils.packTableColumns(_tableViewer);
		} else {
			//System.out.println("TableRefreshPropertyListener.propertyChange: refresh all " + oldValue + ", " + newValue);
			_tableViewer.refresh(source, true);
		}
		// myTableViewer.refresh(false);
	}
}