bundles/addons/org.eclipse.apogy.addons.sensors.fov.ui/src/org/eclipse/apogy/addons/sensors/fov/ui/wizards/DistanceRangeWizardPage.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 - initial API and implementation
 * 	 	 Regent L'Archeveque
 * SPDX-License-Identifier: EPL-1.0
 *******************************************************************************/
package org.eclipse.apogy.addons.sensors.fov.ui.wizards;

import org.eclipse.apogy.addons.sensors.fov.DistanceRange;
import org.eclipse.apogy.addons.sensors.fov.ui.composites.DistanceRangeComposite;
import org.eclipse.emf.common.notify.Adapter;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.impl.AdapterImpl;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;

public class DistanceRangeWizardPage extends WizardPage {
	private final static String WIZARD_PAGE_ID = "org.eclipse.apogy.addons.sensors.fov.ui.wizards.DistanceRangeWizardPage";

	private final DistanceRange distanceRange;
	private DistanceRangeComposite distanceRangeComposite;

	private Adapter adapter;

	public DistanceRangeWizardPage(DistanceRange distanceRange) {
		super(WIZARD_PAGE_ID);
		this.distanceRange = distanceRange;

		setTitle("Distance Range");
		setDescription("Sets the distance range minium and maximum distances.");
	}

	@Override
	public void createControl(Composite parent) {
		Composite top = new Composite(parent, SWT.None);
		top.setLayout(new GridLayout(1, false));

		this.distanceRangeComposite = new DistanceRangeComposite(top, SWT.NONE);
		this.distanceRangeComposite.setDistanceRange(this.distanceRange);

		setControl(top);

		if (this.distanceRange != null)
			this.distanceRange.eAdapters().add(getAdapter());

		top.addDisposeListener(new DisposeListener() {

			@Override
			public void widgetDisposed(DisposeEvent arg0) {
				if (DistanceRangeWizardPage.this.distanceRange != null)
					DistanceRangeWizardPage.this.distanceRange.eAdapters().remove(getAdapter());
			}
		});

		validate();
	}

	protected void validate() {
		setErrorMessage(null);

		if (this.distanceRange.getMinimumDistance() < 0) {
			setErrorMessage("The specified minimum range should equal or greater than zero !");
		}

		if (this.distanceRange.getMaximumDistance() < 0) {
			setErrorMessage("The specified maximum range should equal or greater than zero !");
		}

		if (this.distanceRange.getMaximumDistance() <= this.distanceRange.getMinimumDistance()) {
			setErrorMessage("The specified maximum range should equal or greater than the minimum range !");
		}

		setPageComplete(getErrorMessage() == null);
	}

	protected Adapter getAdapter() {
		if (this.adapter == null) {
			this.adapter = new AdapterImpl() {
				@Override
				public void notifyChanged(Notification msg) {
					if (msg.getNotifier() instanceof DistanceRange) {
						validate();
					}
				}
			};
		}
		return this.adapter;
	}

}