bundles/core/org.eclipse.apogy.core.invocator.ui/src/org/eclipse/apogy/core/invocator/ui/wizards/VariableFeatureReferenceWizardPage.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,
 *     Olivier L. Larouche - initial API and implementation
 * 
 * SPDX-License-Identifier: EPL-1.0
 * 
 *******************************************************************************/
package org.eclipse.apogy.core.invocator.ui.wizards;

import org.eclipse.apogy.core.invocator.ApogyCoreInvocatorPackage;
import org.eclipse.apogy.core.invocator.VariableFeatureReference;
import org.eclipse.apogy.core.invocator.VariablesList;
import org.eclipse.apogy.core.invocator.ui.composites.VariableFeatureReferenceComposite;
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.dialogs.IDialogPage;
import org.eclipse.jface.viewers.ISelection;
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.widgets.Composite;

public class VariableFeatureReferenceWizardPage extends WizardPage {

	private final static String WIZARD_PAGE_ID = "org.eclipse.apogy.core.invocator.ui.wizards.VariableFeatureReferenceWizardPage";
	private VariableFeatureReferenceComposite variableFeatureReferenceComposite;
	protected VariableFeatureReference variableFeatureReference;
	private VariablesList variablesList;
	protected AdapterImpl adapter;

	/**
	 * Constructor for the WizardPage.
	 * 
	 * @param pageName
	 */
	public VariableFeatureReferenceWizardPage() {
		super(WIZARD_PAGE_ID);
		setTitle("Variable / Type / Feature Selection");
		setDescription("Select the Variable/Type/Feature.");
	}

	public VariableFeatureReferenceWizardPage(VariablesList variablesList,
			VariableFeatureReference variableFeatureReference) {
		this();

		if (this.variableFeatureReference != null) {
			this.variableFeatureReference.eAdapters().remove(getAdapter());
		}

		this.variableFeatureReference = variableFeatureReference;
		this.variablesList = variablesList;

		variableFeatureReference.eAdapters().add(getAdapter());
	}

	protected Adapter getAdapter() {
		if (this.adapter == null) {
			this.adapter = new AdapterImpl() {
				@Override
				public void notifyChanged(Notification msg) {
					if (msg.getFeatureID(
							VariableFeatureReference.class) == ApogyCoreInvocatorPackage.VARIABLE_FEATURE_REFERENCE__VARIABLE
							|| msg.getFeatureID(
									VariableFeatureReference.class) == ApogyCoreInvocatorPackage.VARIABLE_FEATURE_REFERENCE__FEATURE_ROOT
							|| msg.getFeatureID(
									VariableFeatureReference.class) == ApogyCoreInvocatorPackage.VARIABLE_FEATURE_REFERENCE__TYPE_MEMBER_REFERENCE_LIST_ELEMENT) {
						validate();
					}
				}
			};
		}
		return this.adapter;
	}

	/**
	 * @see IDialogPage#createControl(Composite)
	 */
	@Override
	public void createControl(Composite parent) {
		this.variableFeatureReferenceComposite = new VariableFeatureReferenceComposite(parent, SWT.None) {
			@Override
			protected void newSelection(ISelection selection) {
				resetOperationCall();
			}
		};
		this.variableFeatureReferenceComposite.set(this.variablesList, this.variableFeatureReference);
		this.variableFeatureReferenceComposite.addDisposeListener(new DisposeListener() {

			@Override
			public void widgetDisposed(DisposeEvent e) {
				if (VariableFeatureReferenceWizardPage.this.variableFeatureReference != null) {
					VariableFeatureReferenceWizardPage.this.variableFeatureReference.eAdapters().remove(getAdapter());
				}
			}
		});
		setControl(this.variableFeatureReferenceComposite);

		validate();
	}

	protected void resetOperationCall() {
	}

	/**
	 * This method is invoked to validate the content.
	 */
	protected void validate() {
		String errorStr = null;

		if (this.variableFeatureReference.getVariable() == null) {
			errorStr = "Select the variable.";
		}

		setErrorMessage(errorStr);
		setPageComplete(errorStr == null);
	}
}