bundles/common/org.eclipse.apogy.common.topology.ui/src/org/eclipse/apogy/common/topology/ui/wizards/AbstractViewPointWizardPage.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,
 *     Sebastien Gemme
 * 
 * SPDX-License-Identifier: EPL-1.0
 *******************************************************************************/
package org.eclipse.apogy.common.topology.ui.wizards;

import org.eclipse.apogy.common.topology.AbstractViewPoint;
import org.eclipse.apogy.common.topology.ui.composites.AbstractViewPointComposite;
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.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;

public class AbstractViewPointWizardPage extends WizardPage {
	private final static String WIZARD_PAGE_ID = "org.eclipse.apogy.common.topology.ui.wizards.AbstractViewPointWizardPage";

	private final AbstractViewPoint abstractViewPoint;
	private Adapter adapter;
	private AbstractViewPointComposite abstractViewPointComposite;

	public AbstractViewPointWizardPage(AbstractViewPoint abstractViewPoint) {
		super(WIZARD_PAGE_ID);
		this.abstractViewPoint = abstractViewPoint;

		setTitle("View Point");
		setDescription("Sets the View Point name and pose.");

		if (abstractViewPoint != null)
			abstractViewPoint.eAdapters().add(getAdapter());

		validate();
	}

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

		this.abstractViewPointComposite = new AbstractViewPointComposite(top, SWT.NONE, this.abstractViewPoint);
		this.abstractViewPointComposite.setAbstractViewPoint(this.abstractViewPoint);
		this.abstractViewPointComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

		setControl(top);

		top.addDisposeListener(new DisposeListener() {

			@Override
			public void widgetDisposed(DisposeEvent e) {
				if (AbstractViewPointWizardPage.this.abstractViewPointComposite != null
						&& !AbstractViewPointWizardPage.this.abstractViewPointComposite.isDisposed())
					AbstractViewPointWizardPage.this.abstractViewPointComposite.dispose();
				if (AbstractViewPointWizardPage.this.abstractViewPoint != null)
					AbstractViewPointWizardPage.this.abstractViewPoint.eAdapters().remove(getAdapter());

			}
		});
	}

	protected void validate() {
		setErrorMessage(null);

		if (this.abstractViewPoint.getName() == null) {
			setErrorMessage("Name is not set !");
		}

		setPageComplete(getErrorMessage() == null);
	}

	private Adapter getAdapter() {
		if (this.adapter == null) {
			this.adapter = new AdapterImpl() {
				@Override
				public void notifyChanged(Notification msg) {
					validate();
				}
			};
		}

		return this.adapter;
	}
}