bundles/core/org.eclipse.apogy.core.environment.earth.surface.ui/src/org/eclipse/apogy/core/environment/earth/surface/ui/composites/EarthSkyTimeComposite.java

/*******************************************************************************
 * Copyright (c) 2018 Agence spatiale canadienne / Canadian Space Agency 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Pierre Allard,
 *     Regent L'Archeveque - initial API and implementation
 *     
 * SPDX-License-Identifier: EPL-1.0
 *******************************************************************************/
package org.eclipse.apogy.core.environment.earth.surface.ui.composites;

import java.text.DecimalFormat;
import java.text.SimpleDateFormat;

import org.eclipse.apogy.common.databinding.converters.DateToStringConverter;
import org.eclipse.apogy.common.emf.ApogyCommonEMFPackage;
import org.eclipse.apogy.core.environment.earth.EarthWorksite;
import org.eclipse.apogy.core.environment.earth.GeographicCoordinates;
import org.eclipse.apogy.core.environment.earth.surface.EarthSky;
import org.eclipse.apogy.core.environment.earth.surface.ui.databindings.DateToJulianDayStringConverter;
import org.eclipse.apogy.core.environment.earth.surface.ui.databindings.DateToSideralTimeStringConverter;
import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.UpdateValueStrategy;
import org.eclipse.core.databinding.beans.PojoProperties;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.emf.databinding.EMFProperties;
import org.eclipse.emf.databinding.FeaturePath;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class EarthSkyTimeComposite extends Composite {
	private static final Logger Logger = LoggerFactory.getLogger(EarthSkyTimeComposite.class);

	public static final String JULIAN_DAY_FORMAT_STRING = "0.0000000";
	public static final String DATE_FORMAT_STRING = "yyyy.MM.dd HH:mm:ss z";

	// Earth Sky
	private EarthSky earthSky = null;

	// Time Displays.
	private Text localTimeValueLabel = null;
	private Text julianDayValueLabel = null;
	private Text sideralTimeValueLabel = null;

	private DataBindingContext m_bindingContext;

	public EarthSkyTimeComposite(Composite parent, int style) {
		super(parent, style);

		setLayout(new GridLayout(2, false));

		// Local Time
		Label localLabel = new Label(this, SWT.NONE);
		localLabel.setText("Local Time:");

		GridData gridData1 = new GridData();
		gridData1.grabExcessHorizontalSpace = true;
		gridData1.widthHint = 180;
		gridData1.minimumWidth = 180;
		gridData1.horizontalAlignment = SWT.LEFT;
		this.localTimeValueLabel = new Text(this, SWT.NONE | SWT.RIGHT);
		this.localTimeValueLabel.setLayoutData(gridData1);
		this.localTimeValueLabel.setText("2000.01.01 HH:MM:ss zzz");
		this.localTimeValueLabel.setEditable(false);

		// Julian Day
		Label julianDateLabel = new Label(this, SWT.NONE);
		julianDateLabel.setText("Julian Day:");

		GridData gridData2 = new GridData();
		gridData2.grabExcessHorizontalSpace = true;
		gridData2.minimumWidth = 180;
		gridData2.widthHint = 180;
		gridData2.horizontalAlignment = SWT.LEFT;
		this.julianDayValueLabel = new Text(this, SWT.NONE | SWT.RIGHT);
		this.julianDayValueLabel.setLayoutData(gridData2);
		this.julianDayValueLabel.setText("0000000.00000");
		this.julianDayValueLabel.setEditable(false);

		// Sideral time.
		Label sideralTimeLabel = new Label(this, SWT.NONE);
		sideralTimeLabel.setText("Sideral Time:");

		GridData gridData3 = new GridData();
		gridData3.grabExcessHorizontalSpace = true;
		gridData3.widthHint = 180;
		gridData3.minimumWidth = 180;
		gridData3.horizontalAlignment = SWT.LEFT;
		this.sideralTimeValueLabel = new Text(this, SWT.NONE | SWT.RIGHT);
		this.sideralTimeValueLabel.setLayoutData(gridData3);
		this.sideralTimeValueLabel.setText("00:00:00");
		this.sideralTimeValueLabel.setEditable(false);

		addDisposeListener(new DisposeListener() {
			@Override
			public void widgetDisposed(DisposeEvent e) {
				if (EarthSkyTimeComposite.this.m_bindingContext != null)
					EarthSkyTimeComposite.this.m_bindingContext.dispose();

			}
		});
	}

	public EarthSky getEarthSky() {
		return this.earthSky;
	}

	public void setEarthSky(EarthSky earthSky) {
		setEarthSky(earthSky, true);
	}

	public void setEarthSky(EarthSky newEarthSky, boolean update) {
		// Updates EarthSky
		this.earthSky = newEarthSky;

		if (update) {
			if (this.m_bindingContext != null) {
				this.m_bindingContext.dispose();
				this.m_bindingContext = null;
			}
			if (newEarthSky != null) {
				this.m_bindingContext = initDataBindings();
			}
		}
	}

	@SuppressWarnings({ "unchecked", "rawtypes" })
	protected DataBindingContext initDataBindings() {
		DataBindingContext bindingContext = new DataBindingContext();

		EarthWorksite worksite = (EarthWorksite) getEarthSky().getWorksite();
		if (worksite != null) {
			GeographicCoordinates geographicCoordinates = worksite.getGeographicalCoordinates();

			// Local Time
			IObservableValue lbllocalTimeValueLabel = PojoProperties.value("text").observe(this.localTimeValueLabel);
			IObservableValue localTimeObserveValue = EMFProperties
					.value(FeaturePath.fromList(ApogyCommonEMFPackage.Literals.TIMED__TIME)).observe(getEarthSky());

			UpdateValueStrategy localTimeValueStrategy = new UpdateValueStrategy();
			localTimeValueStrategy.setConverter(new DateToStringConverter(new SimpleDateFormat(DATE_FORMAT_STRING)));

			bindingContext.bindValue(lbllocalTimeValueLabel, localTimeObserveValue,
					new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER), localTimeValueStrategy);

			// Julian Day
			IObservableValue lbljulianDayValueLabel = PojoProperties.value("text").observe(this.julianDayValueLabel);
			IObservableValue julianDayObserveValue = EMFProperties
					.value(FeaturePath.fromList(ApogyCommonEMFPackage.Literals.TIMED__TIME)).observe(getEarthSky());

			UpdateValueStrategy julianDayValueStrategy = new UpdateValueStrategy();
			julianDayValueStrategy
					.setConverter(new DateToJulianDayStringConverter(new DecimalFormat(JULIAN_DAY_FORMAT_STRING)));

			bindingContext.bindValue(lbljulianDayValueLabel, julianDayObserveValue,
					new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER), julianDayValueStrategy);

			try {
				// Sideral Time
				IObservableValue lblsideralTimeValueLabel = PojoProperties.value("text")
						.observe(this.sideralTimeValueLabel);
				IObservableValue sideralTimeObserveValue = EMFProperties
						.value(FeaturePath.fromList(ApogyCommonEMFPackage.Literals.TIMED__TIME)).observe(getEarthSky());

				UpdateValueStrategy sideralTimeValueStrategy = new UpdateValueStrategy();
				sideralTimeValueStrategy
						.setConverter(new DateToSideralTimeStringConverter(geographicCoordinates.getLongitude()));

				bindingContext.bindValue(lblsideralTimeValueLabel, sideralTimeObserveValue,
						new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER), sideralTimeValueStrategy);
			} catch (Exception e) {
				Logger.error(e.getMessage(), e);
			}
		}

		return bindingContext;
	}
}