bundles/core/org.eclipse.apogy.core.invocator.ui/src/org/eclipse/apogy/core/invocator/ui/wizards/OperationCallDetailsWizardPage.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.OperationCall;
import org.eclipse.apogy.core.invocator.ui.composites.OperationCallComposite;
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.TreeSelection;
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 OperationCallDetailsWizardPage extends WizardPage {

	private final static String WIZARD_PAGE_ID = "org.eclipse.apogy.core.invocator.ui.wizards.OperationCallDetailsWizardPage";
	private OperationCallComposite operationCallComposite;
	private OperationCall operationCall;
	private AdapterImpl adapter;

	/**
	 * Constructor for the WizardPage.
	 * 
	 * @param pageName
	 */
	public OperationCallDetailsWizardPage() {
		super(WIZARD_PAGE_ID);
		setTitle("Select the Operation");
		setDescription("Select the operation to execute.");
	}

	public OperationCallDetailsWizardPage(OperationCall operationCall) {
		this();

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

		this.operationCall = operationCall;

		this.operationCall.eAdapters().add(getAdapter());
	}

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

		return this.adapter;
	}

	/**
	 * @see IDialogPage#createControl(Composite)
	 */
	@Override
	public void createControl(Composite parent) {
		this.operationCallComposite = new OperationCallComposite(parent, SWT.None, false) {
			@Override
			protected void newSelection(TreeSelection selection) {
				validate();
			}
		};
		this.operationCallComposite.setOperationCall(this.operationCall);
		this.operationCallComposite.addDisposeListener(new DisposeListener() {

			@Override
			public void widgetDisposed(DisposeEvent e) {
				dispose();

			}
		});
		setControl(this.operationCallComposite);

		validate();
	}

	@Override
	public void dispose() {
		super.dispose();
		if (this.operationCall != null) {
			this.operationCall.eAdapters().remove(getAdapter());
		}
	}

	/**
	 * This method is invoked to validate the content.
	 */
	protected void validate() {
		String errorVariable = "";
		String errorEOperation = "";

		if (this.operationCall.getVariable() == null) {
			errorVariable = " <variable>";
		}
		if (this.operationCall.getEOperation() == null) {
			errorEOperation = " <operation>";
		}

		if (errorVariable != "" || errorEOperation != "") {
			setErrorMessage(errorVariable + errorEOperation + " must be provided");
		} else {
			setErrorMessage(null);
		}

		setPageComplete(getErrorMessage() == null);
	}
}