InputEventBlocker.java

package org.japura.gui.util;

import java.awt.AWTEvent;
import java.awt.Toolkit;
import java.awt.event.AWTEventListener;
import java.awt.event.InputEvent;

/**
 * <P>
 * Copyright (C) 2011 Carlos Eduardo Leite de Andrade
 * <P>
 * This library is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any
 * later version.
 * <P>
 * 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 Lesser General Public License for more
 * details.
 * <P>
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <A
 * HREF="www.gnu.org/licenses/">www.gnu.org/licenses/</A>
 * <P>
 * For more information, contact: <A HREF="www.japura.org">www.japura.org</A>
 * <P>
 * 
 * @author Carlos Eduardo Leite de Andrade
 */
public class InputEventBlocker{

  private AWTEventListener listener;

  private AWTEventListener getListener() {
	if (listener == null) {
	  listener = new AWTEventListener() {
		@Override
		public void eventDispatched(AWTEvent event) {
		  if (event instanceof InputEvent) {
			InputEvent ie = (InputEvent) event;
			ie.consume();
		  }
		}
	  };
	}
	return listener;
  }

  public void apply() {
	try {
	  Toolkit.getDefaultToolkit().addAWTEventListener(getListener(),
		  Long.MAX_VALUE);
	} catch (SecurityException e) {
	  e.printStackTrace();
	  // ignore
	}
  }

  public void remove() {
	try {
	  Toolkit.getDefaultToolkit().removeAWTEventListener(getListener());
	} catch (SecurityException e) {
	  // ignore
	}
  }

}