bundles/core/org.eclipse.apogy.core.environment.moon.surface.ui/src/org/eclipse/apogy/core/environment/moon/surface/ui/composites/MoonSkyEarthComposite.java

/*******************************************************************************
 * Copyright (c) 2020 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	- initial API and implementation
 *     
 * SPDX-License-Identifier: EPL-1.0
 *******************************************************************************/
package org.eclipse.apogy.core.environment.moon.surface.ui.composites;

import java.text.DecimalFormat;

import org.eclipse.apogy.common.emf.ui.emfforms.composites.TypedElementSimpleUnitsComposite;
import org.eclipse.apogy.core.environment.ApogyCoreEnvironmentPackage;
import org.eclipse.apogy.core.environment.moon.surface.ApogyMoonSurfaceEnvironmentPackage;
import org.eclipse.apogy.core.environment.moon.surface.MoonSky;
import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.emf.databinding.FeaturePath;
import org.eclipse.emf.ecore.EObject;
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;

public class MoonSkyEarthComposite extends Composite {
	public static String NO_VALUE_AVAILABLE_STRING = "N/A";

	public static final String AZIMUTH_FORMAT_STRING = "0.000";
	public static final String ELEVATION_FORMAT_STRING = "0.000";

	private static int LABEL_WIDTH = 100;
	private static int VALUE_WIDTH = 75;
	private static int BUTTON_WIDTH = 30;

	// Earth Sky
	private MoonSky moonSky = null;

	// Moon Displays.
	private TypedElementSimpleUnitsComposite moonAzimuthValueLabel = null;
	private TypedElementSimpleUnitsComposite moonElevationValueLabel = null;

	private DataBindingContext m_bindingContext;

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

		GridLayout layout = new GridLayout(1, true);
		layout.marginHeight = 0;
		layout.marginBottom = 0;
		layout.marginTop = 0;
		layout.marginLeft = 0;
		layout.marginRight = 0;
		setLayout(layout);

		// Moon Azimuth
		GridData gridDataAzimuth = new GridData();
		gridDataAzimuth.grabExcessHorizontalSpace = false;
		gridDataAzimuth.horizontalAlignment = SWT.LEFT;
		this.moonAzimuthValueLabel = new TypedElementSimpleUnitsComposite(this, SWT.NONE, true, true, true,
				NO_VALUE_AVAILABLE_STRING, LABEL_WIDTH, VALUE_WIDTH, BUTTON_WIDTH) {
			DecimalFormat format = new DecimalFormat(AZIMUTH_FORMAT_STRING);

			@Override
			protected DecimalFormat getDecimalFormat() {
				return this.format;
			}

			@Override
			protected String getLabelText() {
				return "Azimuth:";
			}

			@Override
			protected boolean isFeatureEditable() {
				return false;
			}			
			
			@Override
			protected Double resolveValue(EObject eObject, FeaturePath featurePath) 
			{	
				// Bring value between 0 and 2*Pi
				Double value = super.resolveValue(eObject, featurePath);
				if(value < 0.0) value += 2.0*Math.PI;				
				return value;
			}
		};
		this.moonAzimuthValueLabel.setTypedElement(FeaturePath.fromList(
				ApogyMoonSurfaceEnvironmentPackage.Literals.MOON_SKY__EARTH_HORIZONTAL_COORDINATES,
				ApogyCoreEnvironmentPackage.Literals.HORIZONTAL_COORDINATES__AZIMUTH), getMoonSky());
		this.moonAzimuthValueLabel.setLayoutData(gridDataAzimuth);

		// Moon Elevation
		GridData gridDataElevation = new GridData();
		gridDataElevation.grabExcessHorizontalSpace = false;
		gridDataElevation.horizontalAlignment = SWT.LEFT;
		this.moonElevationValueLabel = new TypedElementSimpleUnitsComposite(this, SWT.NONE, true, true, true,
				NO_VALUE_AVAILABLE_STRING, LABEL_WIDTH, VALUE_WIDTH, BUTTON_WIDTH) {
			DecimalFormat format = new DecimalFormat(ELEVATION_FORMAT_STRING);

			@Override
			protected DecimalFormat getDecimalFormat() {
				return this.format;
			}

			@Override
			protected String getLabelText() {
				return "Elevation:";
			}

			@Override
			protected boolean isFeatureEditable() {
				return false;
			}
		};
		this.moonElevationValueLabel.setLayoutData(gridDataElevation);
		this.moonElevationValueLabel.setTypedElement(FeaturePath.fromList(
				ApogyMoonSurfaceEnvironmentPackage.Literals.MOON_SKY__EARTH_HORIZONTAL_COORDINATES,
				ApogyCoreEnvironmentPackage.Literals.HORIZONTAL_COORDINATES__ALTITUDE), getMoonSky());

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

			}
		});
	}

	public MoonSky getMoonSky() {
		return this.moonSky;
	}

	public void setMoonSky(MoonSky earthSky) {
		setMoonSky(earthSky, true);
	}

	public void setMoonSky(MoonSky newEarthSky, boolean update) {
		// Updates EarthSky
		this.moonSky = newEarthSky;

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

	protected DataBindingContext initDataBindings() {
		DataBindingContext bindingContext = new DataBindingContext();

		this.moonAzimuthValueLabel.setInstance(getMoonSky());
		this.moonElevationValueLabel.setInstance(getMoonSky());

		return bindingContext;
	}
}