ConstantTransmittionLights.java

/*******************************************************************************
 * Copyright (c) 2003-2005, 2013 Till Zoppke.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors:
 *     Till Zoppke - initial API and implementation
 ******************************************************************************/
/*
 * Created on 29.05.2004
 */
package eniac.data.model.parent;

import java.util.Observable;
import java.util.Observer;

import eniac.data.model.EData;
import eniac.data.model.sw.Switch;
import eniac.data.model.unit.ConstantTransmitter1;
import eniac.data.type.EType;

/**
 * @author zoppke
 */
public class ConstantTransmittionLights extends ParentData implements Observer {

	public static final String PAINT_LIGHTS = "PAINT_LIGHTS"; //$NON-NLS-1$

	public void init() {
		super.init();

		// observe the constant transmitter unit
		EData data = getUnit();
		assertInit(data);
		data.addObserver(this);

		// observe the constant lights
		data = getConfiguration().getGarten().getKind(EType.CONSTANT_2_LIGHTS, 0);
		assertInit(data);
		data.addObserver(this);
	}

	public boolean hasPower() {
		ConstantTransmitter1 unit = getUnit();
		return unit.hasPower() && unit.isTransmitting();
	}

	private ConstantTransmitter1 getUnit() {
		EData unit = getConfiguration().getGarten().getKind(EType.CONSTANT_TRANSMITTER_1_UNIT, 0);
		return (ConstantTransmitter1) unit;
	}

	/**
	 * @param o
	 * @param arg
	 * @see java.util.Observer#update(java.util.Observable, java.lang.Object)
	 */
	public void update(Observable o, Object arg) {

		if (arg == PAINT_LIGHTS) {
			// set number to our ciphers
			EData[] ciphers = getGarten().getKinder(EType.CONSTANT_TRANSMITTION_CIPHER);
			ConstantTransmitter1 unit = getUnit();
			long number = unit.getNumber();
			for (int i = ciphers.length - 1; i >= 0; --i) {
				((Switch) ciphers[i]).setValue((int) (number % 10));
				number /= 10;
			}
			// set sign
			EData sign = getGarten().getKind(EType.CONSTANT_TRANSMITTION_SIGN, 0);
			((Switch) sign).setValue(unit.isNegative() ? 0 : 1);

			// notify for repaint
			setChanged();
			notifyObservers(EData.REPAINT);
		}
	}
}