notbuild/org.eclipse.papyrus.requirements.cheatsheet/src/org/eclipse/papyrus/requirements/cheatsheet/handlers/AbstractOpenWizardHandler.java

/*****************************************************************************
 * Copyright (c) 2017 CEA LIST.
 *
 *
 * 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:
 * 
 * 		Mauricio Alferez (mauricio.alferez@cea.fr) CEA LIST - Initial API and implementation
 *
 *****************************************************************************/
package org.eclipse.papyrus.requirements.cheatsheet.handlers;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.INewWizard;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.handlers.HandlerUtil;

public abstract class AbstractOpenWizardHandler extends AbstractHandler {

	private IStructuredSelection getSelection() {
		IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
		if (window != null) {
			ISelection selection = window.getSelectionService().getSelection();
			if (selection instanceof IStructuredSelection) {
				return (IStructuredSelection) selection;
			}
		}
		return StructuredSelection.EMPTY;
	}

	protected abstract INewWizard getConcreteWizard() throws CoreException;

	public Object execute(ExecutionEvent event) throws ExecutionException {
		Shell activeShell = HandlerUtil.getActiveShell(event);
		INewWizard wizard;
		try {
			wizard = getConcreteWizard();
			wizard.init(PlatformUI.getWorkbench(), getSelection());
			WizardDialog dialog = new WizardDialog(activeShell, wizard);
			dialog.create();
			dialog.open();
		} catch (CoreException e) {
			e.printStackTrace();
		}
		return null;
	}
}